/*
* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.net.www.protocol.http;
import java.security.PrivilegedAction;
import java.util.Arrays;
import java.net.URL;
import java.net.URLConnection;
import java.net.ProtocolException;
import java.net.HttpRetryException;
import java.net.PasswordAuthentication;
import java.net.Authenticator;
import java.net.HttpCookie;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.net.SocketTimeoutException;
import java.net.SocketPermission;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.URI;
import java.net.InetSocketAddress;
import java.net.CookieHandler;
import java.net.ResponseCache;
import java.net.CacheResponse;
import java.net.SecureCacheResponse;
import java.net.CacheRequest;
import java.net.URLPermission;
import java.net.Authenticator.RequestorType;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedActionException;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.Map;
import java.util.List;
import java.util.Locale;
import java.util.StringTokenizer;
import java.util.Iterator;
import java.util.HashSet;
import java.util.HashMap;
import java.util.Set;
import sun.net.*;
import sun.net.www.*;
import sun.net.www.http.HttpClient;
import sun.net.www.http.PosterOutputStream;
import sun.net.www.http.ChunkedInputStream;
import sun.net.www.http.ChunkedOutputStream;
import sun.util.logging.PlatformLogger;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import java.net.MalformedURLException;
import java.nio.ByteBuffer;
import static sun.net.www.protocol.http.AuthScheme.BASIC;
import static sun.net.www.protocol.http.AuthScheme.DIGEST;
import static sun.net.www.protocol.http.AuthScheme.NTLM;
import static sun.net.www.protocol.http.AuthScheme.NEGOTIATE;
import static sun.net.www.protocol.http.AuthScheme.KERBEROS;
import static sun.net.www.protocol.http.AuthScheme.UNKNOWN;
/**
* A class to represent an HTTP connection to a remote object.
*/
public class HttpURLConnection extends java.net.HttpURLConnection {
static String HTTP_CONNECT = "CONNECT";
static final String version;
public static final String userAgent;
/* max # of allowed re-directs */
static final int defaultmaxRedirects = 20;
static final int maxRedirects;
/* Not all servers support the (Proxy)-Authentication-Info headers.
* By default, we don't require them to be sent
*/
static final boolean validateProxy;
static final boolean validateServer;
/** A, possibly empty, set of authentication schemes that are disabled
* when proxying plain HTTP ( not HTTPS ). */
static final Set<String> disabledProxyingSchemes;
/** A, possibly empty, set of authentication schemes that are disabled
* when setting up a tunnel for HTTPS ( HTTP CONNECT ). */
static final Set<String> disabledTunnelingSchemes;
private StreamingOutputStream strOutputStream;
private final static String RETRY_MSG1 =
"cannot retry due to proxy authentication, in streaming mode";
private final static String RETRY_MSG2 =
"cannot retry due to server authentication, in streaming mode";
private final static String RETRY_MSG3 =
"cannot retry due to redirection, in streaming mode";
/*
* System properties related to error stream handling:
*
* sun.net.http.errorstream.enableBuffering = <boolean>
*
* With the above system property set to true (default is false),
* when the response code is >=400, the HTTP handler will try to
* buffer the response body (up to a certain amount and within a
* time limit). Thus freeing up the underlying socket connection
* for reuse. The rationale behind this is that usually when the
* server responds with a >=400 error (client error or server
* error, such as 404 file not found), the server will send a
* small response body to explain who to contact and what to do to
* recover. With this property set to true, even if the
* application doesn't call getErrorStream(), read the response
* body, and then call close(), the underlying socket connection
* can still be kept-alive and reused. The following two system
* properties provide further control to the error stream
* buffering behaviour.
*
* sun.net.http.errorstream.timeout = <int>
* the timeout (in millisec) waiting the error stream
* to be buffered; default is 300 ms
*
* sun.net.http.errorstream.bufferSize = <int>
* the size (in bytes) to use for the buffering the error stream;
* default is 4k
*/
/* Should we enable buffering of error streams? */
private static boolean enableESBuffer = false;
/* timeout waiting for read for buffered error stream;
*/
private static int timeout4ESBuffer = 0;
/* buffer size for buffered error stream;
*/
private static int bufSize4ES = 0;
/*
* Restrict setting of request headers through the public api
* consistent with JavaScript XMLHttpRequest2 with a few
* exceptions. Disallowed headers are silently ignored for
* backwards compatibility reasons rather than throwing a
* SecurityException. For example, some applets set the
* Host header since old JREs did not implement HTTP 1.1.
* Additionally, any header starting with Sec- is
* disallowed.
*
* The following headers are allowed for historical reasons:
*
* Accept-Charset, Accept-Encoding, Cookie, Cookie2, Date,
* Referer, TE, User-Agent, headers beginning with Proxy-.
*
* The following headers are allowed in a limited form:
*
* Connection: close
*
* See http://www.w3.org/TR/XMLHttpRequest2.
*/
private static final boolean allowRestrictedHeaders;
private static final Set<String> restrictedHeaderSet;
private static final String[] restrictedHeaders = {
/* Restricted by XMLHttpRequest2 */
//"Accept-Charset",
//"Accept-Encoding",
"Access-Control-Request-Headers",
"Access-Control-Request-Method",
"Connection", /* close is allowed */
"Content-Length",
//"Cookie",
//"Cookie2",
"Content-Transfer-Encoding",
//"Date",
//"Expect",
"Host",
"Keep-Alive",
"Origin",
// "Referer",
// "TE",
"Trailer",
"Transfer-Encoding",
"Upgrade",
//"User-Agent",
"Via"
};
private static String getNetProperty(String name) {
PrivilegedAction<String> pa = () -> NetProperties.get(name);
return AccessController.doPrivileged(pa);
}
private static Set<String> schemesListToSet(String list) {
if (list == null || list.isEmpty())
return Collections.emptySet();
Set<String> s = new HashSet<>();
String[] parts = list.split("\\s*,\\s*");
for (String part : parts)
s.add(part.toLowerCase(Locale.ROOT));
return s;
}
static {
maxRedirects = java.security.AccessController.doPrivileged(
new sun.security.action.GetIntegerAction(
"http.maxRedirects", defaultmaxRedirects)).intValue();
version = java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("java.version"));
String agent = java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("http.agent"));
if (agent == null) {
agent = "Java/"+version;
} else {
agent = agent + " Java/"+version;
}
userAgent = agent;
// A set of net properties to control the use of authentication schemes
// when proxing/tunneling.
String p = getNetProperty("jdk.http.auth.tunneling.disabledSchemes");
disabledTunnelingSchemes = schemesListToSet(p);
p = getNetProperty("jdk.http.auth.proxying.disabledSchemes");
disabledProxyingSchemes = schemesListToSet(p);
validateProxy = java.security.AccessController.doPrivileged(
new sun.security.action.GetBooleanAction(
"http.auth.digest.validateProxy")).booleanValue();
validateServer = java.security.AccessController.doPrivileged(
new sun.security.action.GetBooleanAction(
"http.auth.digest.validateServer")).booleanValue();
enableESBuffer = java.security.AccessController.doPrivileged(
new sun.security.action.GetBooleanAction(
"sun.net.http.errorstream.enableBuffering")).booleanValue();
timeout4ESBuffer = java.security.AccessController.doPrivileged(
new sun.security.action.GetIntegerAction(
"sun.net.http.errorstream.timeout", 300)).intValue();
if (timeout4ESBuffer <= 0) {
timeout4ESBuffer = 300; // use the default
}
bufSize4ES = java.security.AccessController.doPrivileged(
new sun.security.action.GetIntegerAction(
"sun.net.http.errorstream.bufferSize", 4096)).intValue();
if (bufSize4ES <= 0) {
bufSize4ES = 4096; // use the default
}
allowRestrictedHeaders = java.security.AccessController.doPrivileged(
new sun.security.action.GetBooleanAction(
"sun.net.http.allowRestrictedHeaders")).booleanValue();
if (!allowRestrictedHeaders) {
restrictedHeaderSet = new HashSet<String>(restrictedHeaders.length);
for (int i=0; i < restrictedHeaders.length; i++) {
restrictedHeaderSet.add(restrictedHeaders[i].toLowerCase());
}
} else {
restrictedHeaderSet = null;
}
}
static final String httpVersion = "HTTP/1.1";
static final String acceptString =
"text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2";
// the following http request headers should NOT have their values
// returned for security reasons.
private static final String[] EXCLUDE_HEADERS = {
"Proxy-Authorization",
"Authorization"
};
// also exclude system cookies when any might be set
private static final String[] EXCLUDE_HEADERS2= {
"Proxy-Authorization",
"Authorization",
"Cookie",
"Cookie2"
};
protected HttpClient http;
protected Handler handler;
protected Proxy instProxy;
private CookieHandler cookieHandler;
private final ResponseCache cacheHandler;
// the cached response, and cached response headers and body
protected CacheResponse cachedResponse;
private MessageHeader cachedHeaders;
private InputStream cachedInputStream;
/* output stream to server */
protected PrintStream ps = null;
/* buffered error stream */
private InputStream errorStream = null;
/* User set Cookies */
private boolean setUserCookies = true;
private String userCookies = null;
private String userCookies2 = null;
/* We only have a single static authenticator for now.
* REMIND: backwards compatibility with JDK 1.1. Should be
* eliminated for JDK 2.0.
*/
@Deprecated
private static HttpAuthenticator defaultAuth;
/* all the headers we send
* NOTE: do *NOT* dump out the content of 'requests' in the
* output or stacktrace since it may contain security-sensitive
* headers such as those defined in EXCLUDE_HEADERS.
*/
private MessageHeader requests;
/* The headers actually set by the user are recorded here also
*/
private MessageHeader userHeaders;
/* Headers and request method cannot be changed
* once this flag is set in :-
* - getOutputStream()
* - getInputStream())
* - connect()
* Access synchronized on this.
*/
private boolean connecting = false;
/* The following two fields are only used with Digest Authentication */
String domain; /* The list of authentication domains */
DigestAuthentication.Parameters digestparams;
/* Current credentials in use */
AuthenticationInfo currentProxyCredentials = null;
AuthenticationInfo currentServerCredentials = null;
boolean needToCheck = true;
private boolean doingNTLM2ndStage = false; /* doing the 2nd stage of an NTLM server authentication */
private boolean doingNTLMp2ndStage = false; /* doing the 2nd stage of an NTLM proxy authentication */
/* try auth without calling Authenticator. Used for transparent NTLM authentication */
private boolean tryTransparentNTLMServer = true;
private boolean tryTransparentNTLMProxy = true;
private boolean useProxyResponseCode = false;
/* Used by Windows specific code */
private Object authObj;
/* Set if the user is manually setting the Authorization or Proxy-Authorization headers */
boolean isUserServerAuth;
boolean isUserProxyAuth;
String serverAuthKey, proxyAuthKey;
/* Progress source */
protected ProgressSource pi;
/* all the response headers we get back */
private MessageHeader responses;
/* the stream _from_ the server */
private InputStream inputStream = null;
/* post stream _to_ the server, if any */
private PosterOutputStream poster = null;
/* Indicates if the std. request headers have been set in requests. */
private boolean setRequests=false;
/* Indicates whether a request has already failed or not */
private boolean failedOnce=false;
/* Remembered Exception, we will throw it again if somebody
calls getInputStream after disconnect */
private Exception rememberedException = null;
/* If we decide we want to reuse a client, we put it here */
private HttpClient reuseClient = null;
/* Tunnel states */
public enum TunnelState {
/* No tunnel */
NONE,
/* Setting up a tunnel */
SETUP,
/* Tunnel has been successfully setup */
TUNNELING
}
private TunnelState tunnelState = TunnelState.NONE;
/* Redefine timeouts from java.net.URLConnection as we need -1 to mean
* not set. This is to ensure backward compatibility.
*/
private int connectTimeout = NetworkClient.DEFAULT_CONNECT_TIMEOUT;
private int readTimeout = NetworkClient.DEFAULT_READ_TIMEOUT;
/* A permission converted from a URLPermission */
private SocketPermission socketPermission;
/* Logging support */
private static final PlatformLogger logger =
PlatformLogger.getLogger("sun.net.www.protocol.http.HttpURLConnection");
/*
* privileged request password authentication
*
*/
private static PasswordAuthentication
privilegedRequestPasswordAuthentication(
final String host,
final InetAddress addr,
final int port,
final String protocol,
final String prompt,
final String scheme,
final URL url,
final RequestorType authType) {
return java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<PasswordAuthentication>() {
public PasswordAuthentication run() {
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Requesting Authentication: host =" + host + " url = " + url);
}
PasswordAuthentication pass = Authenticator.requestPasswordAuthentication(
host, addr, port, protocol,
prompt, scheme, url, authType);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Authentication returned: " + (pass != null ? pass.toString() : "null"));
}
return pass;
}
});
}
private boolean isRestrictedHeader(String key, String value) {
if (allowRestrictedHeaders) {
return false;
}
key = key.toLowerCase();
if (restrictedHeaderSet.contains(key)) {
/*
* Exceptions to restricted headers:
*
* Allow "Connection: close".
*/
if (key.equals("connection") && value.equalsIgnoreCase("close")) {
return false;
}
return true;
} else if (key.startsWith("sec-")) {
return true;
}
return false;
}
/*
* Checks the validity of http message header and whether the header
* is restricted and throws IllegalArgumentException if invalid or
* restricted.
*/
private boolean isExternalMessageHeaderAllowed(String key, String value) {
checkMessageHeader(key, value);
if (!isRestrictedHeader(key, value)) {
return true;
}
return false;
}
/* Logging support */
public static PlatformLogger getHttpLogger() {
return logger;
}
/* Used for Windows NTLM implementation */
public Object authObj() {
return authObj;
}
public void authObj(Object authObj) {
this.authObj = authObj;
}
/*
* checks the validity of http message header and throws
* IllegalArgumentException if invalid.
*/
private void checkMessageHeader(String key, String value) {
char LF = '\n';
int index = key.indexOf(LF);
int index1 = key.indexOf(':');
if (index != -1 || index1 != -1) {
throw new IllegalArgumentException(
"Illegal character(s) in message header field: " + key);
}
else {
if (value == null) {
return;
}
index = value.indexOf(LF);
while (index != -1) {
index++;
if (index < value.length()) {
char c = value.charAt(index);
if ((c==' ') || (c=='\t')) {
// ok, check the next occurrence
index = value.indexOf(LF, index);
continue;
}
}
throw new IllegalArgumentException(
"Illegal character(s) in message header value: " + value);
}
}
}
public synchronized void setRequestMethod(String method)
throws ProtocolException {
if (connecting) {
throw new IllegalStateException("connect in progress");
}
super.setRequestMethod(method);
}
/* adds the standard key/val pairs to reqests if necessary & write to
* given PrintStream
*/
private void writeRequests() throws IOException {
/* print all message headers in the MessageHeader
* onto the wire - all the ones we've set and any
* others that have been set
*/
// send any pre-emptive authentication
if (http.usingProxy && tunnelState() != TunnelState.TUNNELING) {
setPreemptiveProxyAuthentication(requests);
}
if (!setRequests) {
/* We're very particular about the order in which we
* set the request headers here. The order should not
* matter, but some careless CGI programs have been
* written to expect a very particular order of the
* standard headers. To name names, the order in which
* Navigator3.0 sends them. In particular, we make *sure*
* to send Content-type: <> and Content-length:<> second
* to last and last, respectively, in the case of a POST
* request.
*/
if (!failedOnce) {
checkURLFile();
requests.prepend(method + " " + getRequestURI()+" " +
httpVersion, null);
}
if (!getUseCaches()) {
requests.setIfNotSet ("Cache-Control", "no-cache");
requests.setIfNotSet ("Pragma", "no-cache");
}
requests.setIfNotSet("User-Agent", userAgent);
int port = url.getPort();
String host = url.getHost();
if (port != -1 && port != url.getDefaultPort()) {
host += ":" + String.valueOf(port);
}
String reqHost = requests.findValue("Host");
if (reqHost == null ||
(!reqHost.equalsIgnoreCase(host) && !checkSetHost()))
{
requests.set("Host", host);
}
requests.setIfNotSet("Accept", acceptString);
/*
* For HTTP/1.1 the default behavior is to keep connections alive.
* However, we may be talking to a 1.0 server so we should set
* keep-alive just in case, except if we have encountered an error
* or if keep alive is disabled via a system property
*/
// Try keep-alive only on first attempt
if (!failedOnce && http.getHttpKeepAliveSet()) {
if (http.usingProxy && tunnelState() != TunnelState.TUNNELING) {
requests.setIfNotSet("Proxy-Connection", "keep-alive");
} else {
requests.setIfNotSet("Connection", "keep-alive");
}
} else {
/*
* RFC 2616 HTTP/1.1 section 14.10 says:
* HTTP/1.1 applications that do not support persistent
* connections MUST include the "close" connection option
* in every message
*/
requests.setIfNotSet("Connection", "close");
}
// Set modified since if necessary
long modTime = getIfModifiedSince();
if (modTime != 0 ) {
Date date = new Date(modTime);
//use the preferred date format according to RFC 2068(HTTP1.1),
// RFC 822 and RFC 1123
SimpleDateFormat fo =
new SimpleDateFormat ("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US);
fo.setTimeZone(TimeZone.getTimeZone("GMT"));
requests.setIfNotSet("If-Modified-Since", fo.format(date));
}
// check for preemptive authorization
AuthenticationInfo sauth = AuthenticationInfo.getServerAuth(url);
if (sauth != null && sauth.supportsPreemptiveAuthorization() ) {
// Sets "Authorization"
requests.setIfNotSet(sauth.getHeaderName(), sauth.getHeaderValue(url,method));
currentServerCredentials = sauth;
}
if (!method.equals("PUT") && (poster != null || streaming())) {
requests.setIfNotSet ("Content-type",
"application/x-www-form-urlencoded");
}
boolean chunked = false;
if (streaming()) {
if (chunkLength != -1) {
requests.set ("Transfer-Encoding", "chunked");
chunked = true;
} else { /* fixed content length */
if (fixedContentLengthLong != -1) {
requests.set ("Content-Length",
String.valueOf(fixedContentLengthLong));
} else if (fixedContentLength != -1) {
requests.set ("Content-Length",
String.valueOf(fixedContentLength));
}
}
} else if (poster != null) {
/* add Content-Length & POST/PUT data */
synchronized (poster) {
/* close it, so no more data can be added */
poster.close();
requests.set("Content-Length",
String.valueOf(poster.size()));
}
}
if (!chunked) {
if (requests.findValue("Transfer-Encoding") != null) {
requests.remove("Transfer-Encoding");
if (logger.isLoggable(PlatformLogger.Level.WARNING)) {
logger.warning(
"use streaming mode for chunked encoding");
}
}
}
// get applicable cookies based on the uri and request headers
// add them to the existing request headers
setCookieHeader();
setRequests=true;
}
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(requests.toString());
}
http.writeRequests(requests, poster, streaming());
if (ps.checkError()) {
String proxyHost = http.getProxyHostUsed();
int proxyPort = http.getProxyPortUsed();
disconnectInternal();
if (failedOnce) {
throw new IOException("Error writing to server");
} else { // try once more
failedOnce=true;
if (proxyHost != null) {
setProxiedClient(url, proxyHost, proxyPort);
} else {
setNewClient (url);
}
ps = (PrintStream) http.getOutputStream();
connected=true;
responses = new MessageHeader();
setRequests=false;
writeRequests();
}
}
}
private boolean checkSetHost() {
SecurityManager s = System.getSecurityManager();
if (s != null) {
String name = s.getClass().getName();
if (name.equals("sun.plugin2.applet.AWTAppletSecurityManager") ||
name.equals("sun.plugin2.applet.FXAppletSecurityManager") ||
name.equals("com.sun.javaws.security.JavaWebStartSecurity") ||
name.equals("sun.plugin.security.ActivatorSecurityManager"))
{
int CHECK_SET_HOST = -2;
try {
s.checkConnect(url.toExternalForm(), CHECK_SET_HOST);
} catch (SecurityException ex) {
return false;
}
}
}
return true;
}
private void checkURLFile() {
SecurityManager s = System.getSecurityManager();
if (s != null) {
String name = s.getClass().getName();
if (name.equals("sun.plugin2.applet.AWTAppletSecurityManager") ||
name.equals("sun.plugin2.applet.FXAppletSecurityManager") ||
name.equals("com.sun.javaws.security.JavaWebStartSecurity") ||
name.equals("sun.plugin.security.ActivatorSecurityManager"))
{
int CHECK_SUBPATH = -3;
try {
s.checkConnect(url.toExternalForm(), CHECK_SUBPATH);
} catch (SecurityException ex) {
throw new SecurityException("denied access outside a permitted URL subpath", ex);
}
}
}
}
/**
* Create a new HttpClient object, bypassing the cache of
* HTTP client objects/connections.
*
* @param url the URL being accessed
*/
protected void setNewClient (URL url)
throws IOException {
setNewClient(url, false);
}
/**
* Obtain a HttpsClient object. Use the cached copy if specified.
*
* @param url the URL being accessed
* @param useCache whether the cached connection should be used
* if present
*/
protected void setNewClient (URL url, boolean useCache)
throws IOException {
http = HttpClient.New(url, null, -1, useCache, connectTimeout, this);
http.setReadTimeout(readTimeout);
}
/**
* Create a new HttpClient object, set up so that it uses
* per-instance proxying to the given HTTP proxy. This
* bypasses the cache of HTTP client objects/connections.
*
* @param url the URL being accessed
* @param proxyHost the proxy host to use
* @param proxyPort the proxy port to use
*/
protected void setProxiedClient (URL url, String proxyHost, int proxyPort)
throws IOException {
setProxiedClient(url, proxyHost, proxyPort, false);
}
/**
* Obtain a HttpClient object, set up so that it uses per-instance
* proxying to the given HTTP proxy. Use the cached copy of HTTP
* client objects/connections if specified.
*
* @param url the URL being accessed
* @param proxyHost the proxy host to use
* @param proxyPort the proxy port to use
* @param useCache whether the cached connection should be used
* if present
*/
protected void setProxiedClient (URL url,
String proxyHost, int proxyPort,
boolean useCache)
throws IOException {
proxiedConnect(url, proxyHost, proxyPort, useCache);
}
protected void proxiedConnect(URL url,
String proxyHost, int proxyPort,
boolean useCache)
throws IOException {
http = HttpClient.New (url, proxyHost, proxyPort, useCache,
connectTimeout, this);
http.setReadTimeout(readTimeout);
}
protected HttpURLConnection(URL u, Handler handler)
throws IOException {
// we set proxy == null to distinguish this case with the case
// when per connection proxy is set
this(u, null, handler);
}
public HttpURLConnection(URL u, String host, int port) {
this(u, new Proxy(Proxy.Type.HTTP, InetSocketAddress.createUnresolved(host, port)));
}
/** this constructor is used by other protocol handlers such as ftp
that want to use http to fetch urls on their behalf.*/
public HttpURLConnection(URL u, Proxy p) {
this(u, p, new Handler());
}
protected HttpURLConnection(URL u, Proxy p, Handler handler) {
super(u);
requests = new MessageHeader();
responses = new MessageHeader();
userHeaders = new MessageHeader();
this.handler = handler;
instProxy = p;
if (instProxy instanceof sun.net.ApplicationProxy) {
/* Application set Proxies should not have access to cookies
* in a secure environment unless explicitly allowed. */
try {
cookieHandler = CookieHandler.getDefault();
} catch (SecurityException se) { /* swallow exception */ }
} else {
cookieHandler = java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<CookieHandler>() {
public CookieHandler run() {
return CookieHandler.getDefault();
}
});
}
cacheHandler = java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<ResponseCache>() {
public ResponseCache run() {
return ResponseCache.getDefault();
}
});
}
/**
* @deprecated. Use java.net.Authenticator.setDefault() instead.
*/
@Deprecated
public static void setDefaultAuthenticator(HttpAuthenticator a) {
defaultAuth = a;
}
/**
* opens a stream allowing redirects only to the same host.
*/
public static InputStream openConnectionCheckRedirects(URLConnection c)
throws IOException
{
boolean redir;
int redirects = 0;
InputStream in;
do {
if (c instanceof HttpURLConnection) {
((HttpURLConnection) c).setInstanceFollowRedirects(false);
}
// We want to open the input stream before
// getting headers, because getHeaderField()
// et al swallow IOExceptions.
in = c.getInputStream();
redir = false;
if (c instanceof HttpURLConnection) {
HttpURLConnection http = (HttpURLConnection) c;
int stat = http.getResponseCode();
if (stat >= 300 && stat <= 307 && stat != 306 &&
stat != HttpURLConnection.HTTP_NOT_MODIFIED) {
URL base = http.getURL();
String loc = http.getHeaderField("Location");
URL target = null;
if (loc != null) {
target = new URL(base, loc);
}
http.disconnect();
if (target == null
|| !base.getProtocol().equals(target.getProtocol())
|| base.getPort() != target.getPort()
|| !hostsEqual(base, target)
|| redirects >= 5)
{
throw new SecurityException("illegal URL redirect");
}
redir = true;
c = target.openConnection();
redirects++;
}
}
} while (redir);
return in;
}
//
// Same as java.net.URL.hostsEqual
//
private static boolean hostsEqual(URL u1, URL u2) {
final String h1 = u1.getHost();
final String h2 = u2.getHost();
if (h1 == null) {
return h2 == null;
} else if (h2 == null) {
return false;
} else if (h1.equalsIgnoreCase(h2)) {
return true;
}
// Have to resolve addresses before comparing, otherwise
// names like tachyon and tachyon.eng would compare different
final boolean result[] = {false};
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Void>() {
public Void run() {
try {
InetAddress a1 = InetAddress.getByName(h1);
InetAddress a2 = InetAddress.getByName(h2);
result[0] = a1.equals(a2);
} catch(UnknownHostException | SecurityException e) {
}
return null;
}
});
return result[0];
}
// overridden in HTTPS subclass
public void connect() throws IOException {
synchronized (this) {
connecting = true;
}
plainConnect();
}
private boolean checkReuseConnection () {
if (connected) {
return true;
}
if (reuseClient != null) {
http = reuseClient;
http.setReadTimeout(getReadTimeout());
http.reuse = false;
reuseClient = null;
connected = true;
return true;
}
return false;
}
private String getHostAndPort(URL url) {
String host = url.getHost();
final String hostarg = host;
try {
// lookup hostname and use IP address if available
host = AccessController.doPrivileged(
new PrivilegedExceptionAction<String>() {
public String run() throws IOException {
InetAddress addr = InetAddress.getByName(hostarg);
return addr.getHostAddress();
}
}
);
} catch (PrivilegedActionException e) {}
int port = url.getPort();
if (port == -1) {
String scheme = url.getProtocol();
if ("http".equals(scheme)) {
return host + ":80";
} else { // scheme must be https
return host + ":443";
}
}
return host + ":" + Integer.toString(port);
}
protected void plainConnect() throws IOException {
synchronized (this) {
if (connected) {
return;
}
}
SocketPermission p = URLtoSocketPermission(this.url);
if (p != null) {
try {
AccessController.doPrivilegedWithCombiner(
new PrivilegedExceptionAction<Void>() {
public Void run() throws IOException {
plainConnect0();
return null;
}
}, null, p
);
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
} else {
// run without additional permission
plainConnect0();
}
}
/**
* if the caller has a URLPermission for connecting to the
* given URL, then return a SocketPermission which permits
* access to that destination. Return null otherwise. The permission
* is cached in a field (which can only be changed by redirects)
*/
SocketPermission URLtoSocketPermission(URL url) throws IOException {
if (socketPermission != null) {
return socketPermission;
}
SecurityManager sm = System.getSecurityManager();
if (sm == null) {
return null;
}
// the permission, which we might grant
SocketPermission newPerm = new SocketPermission(
getHostAndPort(url), "connect"
);
String actions = getRequestMethod()+":" +
getUserSetHeaders().getHeaderNamesInList();
String urlstring = url.getProtocol() + "://" + url.getAuthority()
+ url.getPath();
URLPermission p = new URLPermission(urlstring, actions);
try {
sm.checkPermission(p);
socketPermission = newPerm;
return socketPermission;
} catch (SecurityException e) {
// fall thru
}
return null;
}
protected void plainConnect0() throws IOException {
// try to see if request can be served from local cache
if (cacheHandler != null && getUseCaches()) {
try {
URI uri = ParseUtil.toURI(url);
if (uri != null) {
cachedResponse = cacheHandler.get(uri, getRequestMethod(), getUserSetHeaders().getHeaders());
if ("https".equalsIgnoreCase(uri.getScheme())
&& !(cachedResponse instanceof SecureCacheResponse)) {
cachedResponse = null;
}
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Cache Request for " + uri + " / " + getRequestMethod());
logger.finest("From cache: " + (cachedResponse != null ? cachedResponse.toString() : "null"));
}
if (cachedResponse != null) {
cachedHeaders = mapToMessageHeader(cachedResponse.getHeaders());
cachedInputStream = cachedResponse.getBody();
}
}
} catch (IOException ioex) {
// ignore and commence normal connection
}
if (cachedHeaders != null && cachedInputStream != null) {
connected = true;
return;
} else {
cachedResponse = null;
}
}
try {
/* Try to open connections using the following scheme,
* return on the first one that's successful:
* 1) if (instProxy != null)
* connect to instProxy; raise exception if failed
* 2) else use system default ProxySelector
* 3) is 2) fails, make direct connection
*/
if (instProxy == null) { // no instance Proxy is set
/**
* Do we have to use a proxy?
*/
ProxySelector sel =
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<ProxySelector>() {
public ProxySelector run() {
return ProxySelector.getDefault();
}
});
if (sel != null) {
URI uri = sun.net.www.ParseUtil.toURI(url);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("ProxySelector Request for " + uri);
}
Iterator<Proxy> it = sel.select(uri).iterator();
Proxy p;
while (it.hasNext()) {
p = it.next();
try {
if (!failedOnce) {
http = getNewHttpClient(url, p, connectTimeout);
http.setReadTimeout(readTimeout);
} else {
// make sure to construct new connection if first
// attempt failed
http = getNewHttpClient(url, p, connectTimeout, false);
http.setReadTimeout(readTimeout);
}
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
if (p != null) {
logger.finest("Proxy used: " + p.toString());
}
}
break;
} catch (IOException ioex) {
if (p != Proxy.NO_PROXY) {
sel.connectFailed(uri, p.address(), ioex);
if (!it.hasNext()) {
// fallback to direct connection
http = getNewHttpClient(url, null, connectTimeout, false);
http.setReadTimeout(readTimeout);
break;
}
} else {
throw ioex;
}
continue;
}
}
} else {
// No proxy selector, create http client with no proxy
if (!failedOnce) {
http = getNewHttpClient(url, null, connectTimeout);
http.setReadTimeout(readTimeout);
} else {
// make sure to construct new connection if first
// attempt failed
http = getNewHttpClient(url, null, connectTimeout, false);
http.setReadTimeout(readTimeout);
}
}
} else {
if (!failedOnce) {
http = getNewHttpClient(url, instProxy, connectTimeout);
http.setReadTimeout(readTimeout);
} else {
// make sure to construct new connection if first
// attempt failed
http = getNewHttpClient(url, instProxy, connectTimeout, false);
http.setReadTimeout(readTimeout);
}
}
ps = (PrintStream)http.getOutputStream();
} catch (IOException e) {
throw e;
}
// constructor to HTTP client calls openserver
connected = true;
}
// subclass HttpsClient will overwrite & return an instance of HttpsClient
protected HttpClient getNewHttpClient(URL url, Proxy p, int connectTimeout)
throws IOException {
return HttpClient.New(url, p, connectTimeout, this);
}
// subclass HttpsClient will overwrite & return an instance of HttpsClient
protected HttpClient getNewHttpClient(URL url, Proxy p,
int connectTimeout, boolean useCache)
throws IOException {
return HttpClient.New(url, p, connectTimeout, useCache, this);
}
private void expect100Continue() throws IOException {
// Expect: 100-Continue was set, so check the return code for
// Acceptance
int oldTimeout = http.getReadTimeout();
boolean enforceTimeOut = false;
boolean timedOut = false;
if (oldTimeout <= 0) {
// 5s read timeout in case the server doesn't understand
// Expect: 100-Continue
http.setReadTimeout(5000);
enforceTimeOut = true;
}
try {
http.parseHTTP(responses, pi, this);
} catch (SocketTimeoutException se) {
if (!enforceTimeOut) {
throw se;
}
timedOut = true;
http.setIgnoreContinue(true);
}
if (!timedOut) {
// Can't use getResponseCode() yet
String resp = responses.getValue(0);
// Parse the response which is of the form:
// HTTP/1.1 417 Expectation Failed
// HTTP/1.1 100 Continue
if (resp != null && resp.startsWith("HTTP/")) {
String[] sa = resp.split("\\s+");
responseCode = -1;
try {
// Response code is 2nd token on the line
if (sa.length > 1)
responseCode = Integer.parseInt(sa[1]);
} catch (NumberFormatException numberFormatException) {
}
}
if (responseCode != 100) {
throw new ProtocolException("Server rejected operation");
}
}
http.setReadTimeout(oldTimeout);
responseCode = -1;
responses.reset();
// Proceed
}
/*
* Allowable input/output sequences:
* [interpreted as request entity]
* - get output, [write output,] get input, [read input]
* - get output, [write output]
* [interpreted as GET]
* - get input, [read input]
* Disallowed:
* - get input, [read input,] get output, [write output]
*/
@Override
public synchronized OutputStream getOutputStream() throws IOException {
connecting = true;
SocketPermission p = URLtoSocketPermission(this.url);
if (p != null) {
try {
return AccessController.doPrivilegedWithCombiner(
new PrivilegedExceptionAction<OutputStream>() {
public OutputStream run() throws IOException {
return getOutputStream0();
}
}, null, p
);
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
} else {
return getOutputStream0();
}
}
private synchronized OutputStream getOutputStream0() throws IOException {
try {
if (!doOutput) {
throw new ProtocolException("cannot write to a URLConnection"
+ " if doOutput=false - call setDoOutput(true)");
}
if (method.equals("GET")) {
method = "POST"; // Backward compatibility
}
if ("TRACE".equals(method) && "http".equals(url.getProtocol())) {
throw new ProtocolException("HTTP method TRACE" +
" doesn't support output");
}
// if there's already an input stream open, throw an exception
if (inputStream != null) {
throw new ProtocolException("Cannot write output after reading input.");
}
if (!checkReuseConnection())
connect();
boolean expectContinue = false;
String expects = requests.findValue("Expect");
if ("100-Continue".equalsIgnoreCase(expects) && streaming()) {
http.setIgnoreContinue(false);
expectContinue = true;
}
if (streaming() && strOutputStream == null) {
writeRequests();
}
if (expectContinue) {
expect100Continue();
}
ps = (PrintStream)http.getOutputStream();
if (streaming()) {
if (strOutputStream == null) {
if (chunkLength != -1) { /* chunked */
strOutputStream = new StreamingOutputStream(
new ChunkedOutputStream(ps, chunkLength), -1L);
} else { /* must be fixed content length */
long length = 0L;
if (fixedContentLengthLong != -1) {
length = fixedContentLengthLong;
} else if (fixedContentLength != -1) {
length = fixedContentLength;
}
strOutputStream = new StreamingOutputStream(ps, length);
}
}
return strOutputStream;
} else {
if (poster == null) {
poster = new PosterOutputStream();
}
return poster;
}
} catch (RuntimeException e) {
disconnectInternal();
throw e;
} catch (ProtocolException e) {
// Save the response code which may have been set while enforcing
// the 100-continue. disconnectInternal() forces it to -1
int i = responseCode;
disconnectInternal();
responseCode = i;
throw e;
} catch (IOException e) {
disconnectInternal();
throw e;
}
}
public boolean streaming () {
return (fixedContentLength != -1) || (fixedContentLengthLong != -1) ||
(chunkLength != -1);
}
/*
* get applicable cookies based on the uri and request headers
* add them to the existing request headers
*/
private void setCookieHeader() throws IOException {
if (cookieHandler != null) {
// we only want to capture the user defined Cookies once, as
// they cannot be changed by user code after we are connected,
// only internally.
synchronized (this) {
if (setUserCookies) {
int k = requests.getKey("Cookie");
if (k != -1)
userCookies = requests.getValue(k);
k = requests.getKey("Cookie2");
if (k != -1)
userCookies2 = requests.getValue(k);
setUserCookies = false;
}
}
// remove old Cookie header before setting new one.
requests.remove("Cookie");
requests.remove("Cookie2");
URI uri = ParseUtil.toURI(url);
if (uri != null) {
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("CookieHandler request for " + uri);
}
Map<String, List<String>> cookies
= cookieHandler.get(
uri, requests.getHeaders(EXCLUDE_HEADERS));
if (!cookies.isEmpty()) {
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Cookies retrieved: " + cookies.toString());
}
for (Map.Entry<String, List<String>> entry :
cookies.entrySet()) {
String key = entry.getKey();
// ignore all entries that don't have "Cookie"
// or "Cookie2" as keys
if (!"Cookie".equalsIgnoreCase(key) &&
!"Cookie2".equalsIgnoreCase(key)) {
continue;
}
List<String> l = entry.getValue();
if (l != null && !l.isEmpty()) {
StringBuilder cookieValue = new StringBuilder();
for (String value : l) {
cookieValue.append(value).append("; ");
}
// strip off the trailing '; '
try {
requests.add(key, cookieValue.substring(0, cookieValue.length() - 2));
} catch (StringIndexOutOfBoundsException ignored) {
// no-op
}
}
}
}
}
if (userCookies != null) {
int k;
if ((k = requests.getKey("Cookie")) != -1)
requests.set("Cookie", requests.getValue(k) + ";" + userCookies);
else
requests.set("Cookie", userCookies);
}
if (userCookies2 != null) {
int k;
if ((k = requests.getKey("Cookie2")) != -1)
requests.set("Cookie2", requests.getValue(k) + ";" + userCookies2);
else
requests.set("Cookie2", userCookies2);
}
} // end of getting cookies
}
@Override
public synchronized InputStream getInputStream() throws IOException {
connecting = true;
SocketPermission p = URLtoSocketPermission(this.url);
if (p != null) {
try {
return AccessController.doPrivilegedWithCombiner(
new PrivilegedExceptionAction<InputStream>() {
public InputStream run() throws IOException {
return getInputStream0();
}
}, null, p
);
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
} else {
return getInputStream0();
}
}
@SuppressWarnings("empty-statement")
private synchronized InputStream getInputStream0() throws IOException {
if (!doInput) {
throw new ProtocolException("Cannot read from URLConnection"
+ " if doInput=false (call setDoInput(true))");
}
if (rememberedException != null) {
if (rememberedException instanceof RuntimeException)
throw new RuntimeException(rememberedException);
else {
throw getChainedException((IOException)rememberedException);
}
}
if (inputStream != null) {
return inputStream;
}
if (streaming() ) {
if (strOutputStream == null) {
getOutputStream();
}
/* make sure stream is closed */
strOutputStream.close ();
if (!strOutputStream.writtenOK()) {
throw new IOException ("Incomplete output stream");
}
}
int redirects = 0;
int respCode = 0;
long cl = -1;
AuthenticationInfo serverAuthentication = null;
AuthenticationInfo proxyAuthentication = null;
AuthenticationHeader srvHdr = null;
/**
* Failed Negotiate
*
* In some cases, the Negotiate auth is supported for the
* remote host but the negotiate process still fails (For
* example, if the web page is located on a backend server
* and delegation is needed but fails). The authentication
* process will start again, and we need to detect this
* kind of failure and do proper fallback (say, to NTLM).
*
* In order to achieve this, the inNegotiate flag is set
* when the first negotiate challenge is met (and reset
* if authentication is finished). If a fresh new negotiate
* challenge (no parameter) is found while inNegotiate is
* set, we know there's a failed auth attempt recently.
* Here we'll ignore the header line so that fallback
* can be practiced.
*
* inNegotiateProxy is for proxy authentication.
*/
boolean inNegotiate = false;
boolean inNegotiateProxy = false;
// If the user has set either of these headers then do not remove them
isUserServerAuth = requests.getKey("Authorization") != -1;
isUserProxyAuth = requests.getKey("Proxy-Authorization") != -1;
try {
do {
if (!checkReuseConnection())
connect();
if (cachedInputStream != null) {
return cachedInputStream;
}
// Check if URL should be metered
boolean meteredInput = ProgressMonitor.getDefault().shouldMeterInput(url, method);
if (meteredInput) {
pi = new ProgressSource(url, method);
pi.beginTracking();
}
/* REMIND: This exists to fix the HttpsURLConnection subclass.
* Hotjava needs to run on JDK1.1FCS. Do proper fix once a
* proper solution for SSL can be found.
*/
ps = (PrintStream)http.getOutputStream();
if (!streaming()) {
writeRequests();
}
http.parseHTTP(responses, pi, this);
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(responses.toString());
}
boolean b1 = responses.filterNTLMResponses("WWW-Authenticate");
boolean b2 = responses.filterNTLMResponses("Proxy-Authenticate");
if (b1 || b2) {
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(">>>> Headers are filtered");
logger.fine(responses.toString());
}
}
inputStream = http.getInputStream();
respCode = getResponseCode();
if (respCode == -1) {
disconnectInternal();
throw new IOException ("Invalid Http response");
}
if (respCode == HTTP_PROXY_AUTH) {
if (streaming()) {
disconnectInternal();
throw new HttpRetryException (
RETRY_MSG1, HTTP_PROXY_AUTH);
}
// Read comments labeled "Failed Negotiate" for details.
boolean dontUseNegotiate = false;
Iterator<String> iter = responses.multiValueIterator("Proxy-Authenticate");
while (iter.hasNext()) {
String value = iter.next().trim();
if (value.equalsIgnoreCase("Negotiate") ||
value.equalsIgnoreCase("Kerberos")) {
if (!inNegotiateProxy) {
inNegotiateProxy = true;
} else {
dontUseNegotiate = true;
doingNTLMp2ndStage = false;
proxyAuthentication = null;
}
break;
}
}
// changes: add a 3rd parameter to the constructor of
// AuthenticationHeader, so that NegotiateAuthentication.
// isSupported can be tested.
// The other 2 appearances of "new AuthenticationHeader" is
// altered in similar ways.
AuthenticationHeader authhdr = new AuthenticationHeader (
"Proxy-Authenticate",
responses,
new HttpCallerInfo(url,
http.getProxyHostUsed(),
http.getProxyPortUsed()),
dontUseNegotiate,
disabledProxyingSchemes
);
if (!doingNTLMp2ndStage) {
proxyAuthentication =
resetProxyAuthentication(proxyAuthentication, authhdr);
if (proxyAuthentication != null) {
redirects++;
disconnectInternal();
continue;
}
} else {
/* in this case, only one header field will be present */
String raw = responses.findValue ("Proxy-Authenticate");
reset ();
if (!proxyAuthentication.setHeaders(this,
authhdr.headerParser(), raw)) {
disconnectInternal();
throw new IOException ("Authentication failure");
}
if (serverAuthentication != null && srvHdr != null &&
!serverAuthentication.setHeaders(this,
srvHdr.headerParser(), raw)) {
disconnectInternal ();
throw new IOException ("Authentication failure");
}
authObj = null;
doingNTLMp2ndStage = false;
continue;
}
} else {
inNegotiateProxy = false;
doingNTLMp2ndStage = false;
if (!isUserProxyAuth)
requests.remove("Proxy-Authorization");
}
// cache proxy authentication info
if (proxyAuthentication != null) {
// cache auth info on success, domain header not relevant.
proxyAuthentication.addToCache();
}
if (respCode == HTTP_UNAUTHORIZED) {
if (streaming()) {
disconnectInternal();
throw new HttpRetryException (
RETRY_MSG2, HTTP_UNAUTHORIZED);
}
// Read comments labeled "Failed Negotiate" for details.
boolean dontUseNegotiate = false;
Iterator<String> iter = responses.multiValueIterator("WWW-Authenticate");
while (iter.hasNext()) {
String value = iter.next().trim();
if (value.equalsIgnoreCase("Negotiate") ||
value.equalsIgnoreCase("Kerberos")) {
if (!inNegotiate) {
inNegotiate = true;
} else {
dontUseNegotiate = true;
doingNTLM2ndStage = false;
serverAuthentication = null;
}
break;
}
}
srvHdr = new AuthenticationHeader (
"WWW-Authenticate", responses,
new HttpCallerInfo(url),
dontUseNegotiate
);
String raw = srvHdr.raw();
if (!doingNTLM2ndStage) {
if ((serverAuthentication != null)&&
serverAuthentication.getAuthScheme() != NTLM) {
if (serverAuthentication.isAuthorizationStale (raw)) {
/* we can retry with the current credentials */
disconnectWeb();
redirects++;
requests.set(serverAuthentication.getHeaderName(),
serverAuthentication.getHeaderValue(url, method));
currentServerCredentials = serverAuthentication;
setCookieHeader();
continue;
} else {
serverAuthentication.removeFromCache();
}
}
serverAuthentication = getServerAuthentication(srvHdr);
currentServerCredentials = serverAuthentication;
if (serverAuthentication != null) {
disconnectWeb();
redirects++; // don't let things loop ad nauseum
setCookieHeader();
continue;
}
} else {
reset ();
/* header not used for ntlm */
if (!serverAuthentication.setHeaders(this, null, raw)) {
disconnectWeb();
throw new IOException ("Authentication failure");
}
doingNTLM2ndStage = false;
authObj = null;
setCookieHeader();
continue;
}
}
// cache server authentication info
if (serverAuthentication != null) {
// cache auth info on success
if (!(serverAuthentication instanceof DigestAuthentication) ||
(domain == null)) {
if (serverAuthentication instanceof BasicAuthentication) {
// check if the path is shorter than the existing entry
String npath = AuthenticationInfo.reducePath (url.getPath());
String opath = serverAuthentication.path;
if (!opath.startsWith (npath) || npath.length() >= opath.length()) {
/* npath is longer, there must be a common root */
npath = BasicAuthentication.getRootPath (opath, npath);
}
// remove the entry and create a new one
BasicAuthentication a =
(BasicAuthentication) serverAuthentication.clone();
serverAuthentication.removeFromCache();
a.path = npath;
serverAuthentication = a;
}
serverAuthentication.addToCache();
} else {
// what we cache is based on the domain list in the request
DigestAuthentication srv = (DigestAuthentication)
serverAuthentication;
StringTokenizer tok = new StringTokenizer (domain," ");
String realm = srv.realm;
PasswordAuthentication pw = srv.pw;
digestparams = srv.params;
while (tok.hasMoreTokens()) {
String path = tok.nextToken();
try {
/* path could be an abs_path or a complete URI */
URL u = new URL (url, path);
DigestAuthentication d = new DigestAuthentication (
false, u, realm, "Digest", pw, digestparams);
d.addToCache ();
} catch (Exception e) {}
}
}
}
// some flags should be reset to its initialized form so that
// even after a redirect the necessary checks can still be
// preformed.
inNegotiate = false;
inNegotiateProxy = false;
//serverAuthentication = null;
doingNTLMp2ndStage = false;
doingNTLM2ndStage = false;
if (!isUserServerAuth)
requests.remove("Authorization");
if (!isUserProxyAuth)
requests.remove("Proxy-Authorization");
if (respCode == HTTP_OK) {
checkResponseCredentials (false);
} else {
needToCheck = false;
}
// a flag need to clean
needToCheck = true;
if (followRedirect()) {
/* if we should follow a redirect, then the followRedirects()
* method will disconnect() and re-connect us to the new
* location
*/
redirects++;
// redirecting HTTP response may have set cookie, so
// need to re-generate request header
setCookieHeader();
continue;
}
try {
cl = Long.parseLong(responses.findValue("content-length"));
} catch (Exception exc) { };
if (method.equals("HEAD") || cl == 0 ||
respCode == HTTP_NOT_MODIFIED ||
respCode == HTTP_NO_CONTENT) {
if (pi != null) {
pi.finishTracking();
pi = null;
}
http.finished();
http = null;
inputStream = new EmptyInputStream();
connected = false;
}
if (respCode == 200 || respCode == 203 || respCode == 206 ||
respCode == 300 || respCode == 301 || respCode == 410) {
if (cacheHandler != null && getUseCaches()) {
// give cache a chance to save response in cache
URI uri = ParseUtil.toURI(url);
if (uri != null) {
URLConnection uconn = this;
if ("https".equalsIgnoreCase(uri.getScheme())) {
try {
// use reflection to get to the public
// HttpsURLConnection instance saved in
// DelegateHttpsURLConnection
uconn = (URLConnection)this.getClass().getField("httpsURLConnection").get(this);
} catch (IllegalAccessException |
NoSuchFieldException e) {
// ignored; use 'this'
}
}
CacheRequest cacheRequest =
cacheHandler.put(uri, uconn);
if (cacheRequest != null && http != null) {
http.setCacheRequest(cacheRequest);
inputStream = new HttpInputStream(inputStream, cacheRequest);
}
}
}
}
if (!(inputStream instanceof HttpInputStream)) {
inputStream = new HttpInputStream(inputStream);
}
if (respCode >= 400) {
if (respCode == 404 || respCode == 410) {
throw new FileNotFoundException(url.toString());
} else {
throw new java.io.IOException("Server returned HTTP" +
" response code: " + respCode + " for URL: " +
url.toString());
}
}
poster = null;
strOutputStream = null;
return inputStream;
} while (redirects < maxRedirects);
throw new ProtocolException("Server redirected too many " +
" times ("+ redirects + ")");
} catch (RuntimeException e) {
disconnectInternal();
rememberedException = e;
throw e;
} catch (IOException e) {
rememberedException = e;
// buffer the error stream if bytes < 4k
// and it can be buffered within 1 second
String te = responses.findValue("Transfer-Encoding");
if (http != null && http.isKeepingAlive() && enableESBuffer &&
(cl > 0 || (te != null && te.equalsIgnoreCase("chunked")))) {
errorStream = ErrorStream.getErrorStream(inputStream, cl, http);
}
throw e;
} finally {
if (proxyAuthKey != null) {
AuthenticationInfo.endAuthRequest(proxyAuthKey);
}
if (serverAuthKey != null) {
AuthenticationInfo.endAuthRequest(serverAuthKey);
}
}
}
/*
* Creates a chained exception that has the same type as
* original exception and with the same message. Right now,
* there is no convenient APIs for doing so.
*/
private IOException getChainedException(final IOException rememberedException) {
try {
final Object[] args = { rememberedException.getMessage() };
IOException chainedException =
java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction<IOException>() {
public IOException run() throws Exception {
return (IOException)
rememberedException.getClass()
.getConstructor(new Class<?>[] { String.class })
.newInstance(args);
}
});
chainedException.initCause(rememberedException);
return chainedException;
} catch (Exception ignored) {
return rememberedException;
}
}
@Override
public InputStream getErrorStream() {
if (connected && responseCode >= 400) {
// Client Error 4xx and Server Error 5xx
if (errorStream != null) {
return errorStream;
} else if (inputStream != null) {
return inputStream;
}
}
return null;
}
/**
* set or reset proxy authentication info in request headers
* after receiving a 407 error. In the case of NTLM however,
* receiving a 407 is normal and we just skip the stale check
* because ntlm does not support this feature.
*/
private AuthenticationInfo
resetProxyAuthentication(AuthenticationInfo proxyAuthentication, AuthenticationHeader auth) throws IOException {
if ((proxyAuthentication != null )&&
proxyAuthentication.getAuthScheme() != NTLM) {
String raw = auth.raw();
if (proxyAuthentication.isAuthorizationStale (raw)) {
/* we can retry with the current credentials */
String value;
if (proxyAuthentication instanceof DigestAuthentication) {
DigestAuthentication digestProxy = (DigestAuthentication)
proxyAuthentication;
if (tunnelState() == TunnelState.SETUP) {
value = digestProxy.getHeaderValue(connectRequestURI(url), HTTP_CONNECT);
} else {
value = digestProxy.getHeaderValue(getRequestURI(), method);
}
} else {
value = proxyAuthentication.getHeaderValue(url, method);
}
requests.set(proxyAuthentication.getHeaderName(), value);
currentProxyCredentials = proxyAuthentication;
return proxyAuthentication;
} else {
proxyAuthentication.removeFromCache();
}
}
proxyAuthentication = getHttpProxyAuthentication(auth);
currentProxyCredentials = proxyAuthentication;
return proxyAuthentication;
}
/**
* Returns the tunnel state.
*
* @return the state
*/
TunnelState tunnelState() {
return tunnelState;
}
/**
* Set the tunneling status.
*
* @param the state
*/
public void setTunnelState(TunnelState tunnelState) {
this.tunnelState = tunnelState;
}
/**
* establish a tunnel through proxy server
*/
public synchronized void doTunneling() throws IOException {
int retryTunnel = 0;
String statusLine = "";
int respCode = 0;
AuthenticationInfo proxyAuthentication = null;
String proxyHost = null;
int proxyPort = -1;
// save current requests so that they can be restored after tunnel is setup.
MessageHeader savedRequests = requests;
requests = new MessageHeader();
// Read comments labeled "Failed Negotiate" for details.
boolean inNegotiateProxy = false;
try {
/* Actively setting up a tunnel */
setTunnelState(TunnelState.SETUP);
do {
if (!checkReuseConnection()) {
proxiedConnect(url, proxyHost, proxyPort, false);
}
// send the "CONNECT" request to establish a tunnel
// through proxy server
sendCONNECTRequest();
responses.reset();
// There is no need to track progress in HTTP Tunneling,
// so ProgressSource is null.
http.parseHTTP(responses, null, this);
/* Log the response to the CONNECT */
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(responses.toString());
}
if (responses.filterNTLMResponses("Proxy-Authenticate")) {
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(">>>> Headers are filtered");
logger.fine(responses.toString());
}
}
statusLine = responses.getValue(0);
StringTokenizer st = new StringTokenizer(statusLine);
st.nextToken();
respCode = Integer.parseInt(st.nextToken().trim());
if (respCode == HTTP_PROXY_AUTH) {
// Read comments labeled "Failed Negotiate" for details.
boolean dontUseNegotiate = false;
Iterator<String> iter = responses.multiValueIterator("Proxy-Authenticate");
while (iter.hasNext()) {
String value = iter.next().trim();
if (value.equalsIgnoreCase("Negotiate") ||
value.equalsIgnoreCase("Kerberos")) {
if (!inNegotiateProxy) {
inNegotiateProxy = true;
} else {
dontUseNegotiate = true;
doingNTLMp2ndStage = false;
proxyAuthentication = null;
}
break;
}
}
AuthenticationHeader authhdr = new AuthenticationHeader (
"Proxy-Authenticate",
responses,
new HttpCallerInfo(url,
http.getProxyHostUsed(),
http.getProxyPortUsed()),
dontUseNegotiate,
disabledTunnelingSchemes
);
if (!doingNTLMp2ndStage) {
proxyAuthentication =
resetProxyAuthentication(proxyAuthentication, authhdr);
if (proxyAuthentication != null) {
proxyHost = http.getProxyHostUsed();
proxyPort = http.getProxyPortUsed();
disconnectInternal();
retryTunnel++;
continue;
}
} else {
String raw = responses.findValue ("Proxy-Authenticate");
reset ();
if (!proxyAuthentication.setHeaders(this,
authhdr.headerParser(), raw)) {
disconnectInternal();
throw new IOException ("Authentication failure");
}
authObj = null;
doingNTLMp2ndStage = false;
continue;
}
}
// cache proxy authentication info
if (proxyAuthentication != null) {
// cache auth info on success, domain header not relevant.
proxyAuthentication.addToCache();
}
if (respCode == HTTP_OK) {
setTunnelState(TunnelState.TUNNELING);
break;
}
// we don't know how to deal with other response code
// so disconnect and report error
disconnectInternal();
setTunnelState(TunnelState.NONE);
break;
} while (retryTunnel < maxRedirects);
if (retryTunnel >= maxRedirects || (respCode != HTTP_OK)) {
throw new IOException("Unable to tunnel through proxy."+
" Proxy returns \"" +
statusLine + "\"");
}
} finally {
if (proxyAuthKey != null) {
AuthenticationInfo.endAuthRequest(proxyAuthKey);
}
}
// restore original request headers
requests = savedRequests;
// reset responses
responses.reset();
}
static String connectRequestURI(URL url) {
String host = url.getHost();
int port = url.getPort();
port = port != -1 ? port : url.getDefaultPort();
return host + ":" + port;
}
/**
* send a CONNECT request for establishing a tunnel to proxy server
*/
private void sendCONNECTRequest() throws IOException {
int port = url.getPort();
requests.set(0, HTTP_CONNECT + " " + connectRequestURI(url)
+ " " + httpVersion, null);
requests.setIfNotSet("User-Agent", userAgent);
String host = url.getHost();
if (port != -1 && port != url.getDefaultPort()) {
host += ":" + String.valueOf(port);
}
requests.setIfNotSet("Host", host);
// Not really necessary for a tunnel, but can't hurt
requests.setIfNotSet("Accept", acceptString);
if (http.getHttpKeepAliveSet()) {
requests.setIfNotSet("Proxy-Connection", "keep-alive");
}
setPreemptiveProxyAuthentication(requests);
/* Log the CONNECT request */
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine(requests.toString());
}
http.writeRequests(requests, null);
}
/**
* Sets pre-emptive proxy authentication in header
*/
private void setPreemptiveProxyAuthentication(MessageHeader requests) throws IOException {
AuthenticationInfo pauth
= AuthenticationInfo.getProxyAuth(http.getProxyHostUsed(),
http.getProxyPortUsed());
if (pauth != null && pauth.supportsPreemptiveAuthorization()) {
String value;
if (pauth instanceof DigestAuthentication) {
DigestAuthentication digestProxy = (DigestAuthentication) pauth;
if (tunnelState() == TunnelState.SETUP) {
value = digestProxy
.getHeaderValue(connectRequestURI(url), HTTP_CONNECT);
} else {
value = digestProxy.getHeaderValue(getRequestURI(), method);
}
} else {
value = pauth.getHeaderValue(url, method);
}
// Sets "Proxy-authorization"
requests.set(pauth.getHeaderName(), value);
currentProxyCredentials = pauth;
}
}
/**
* Gets the authentication for an HTTP proxy, and applies it to
* the connection.
*/
@SuppressWarnings("fallthrough")
private AuthenticationInfo getHttpProxyAuthentication (AuthenticationHeader authhdr) {
/* get authorization from authenticator */
AuthenticationInfo ret = null;
String raw = authhdr.raw();
String host = http.getProxyHostUsed();
int port = http.getProxyPortUsed();
if (host != null && authhdr.isPresent()) {
HeaderParser p = authhdr.headerParser();
String realm = p.findValue("realm");
String scheme = authhdr.scheme();
AuthScheme authScheme = UNKNOWN;
if ("basic".equalsIgnoreCase(scheme)) {
authScheme = BASIC;
} else if ("digest".equalsIgnoreCase(scheme)) {
authScheme = DIGEST;
} else if ("ntlm".equalsIgnoreCase(scheme)) {
authScheme = NTLM;
doingNTLMp2ndStage = true;
} else if ("Kerberos".equalsIgnoreCase(scheme)) {
authScheme = KERBEROS;
doingNTLMp2ndStage = true;
} else if ("Negotiate".equalsIgnoreCase(scheme)) {
authScheme = NEGOTIATE;
doingNTLMp2ndStage = true;
}
if (realm == null)
realm = "";
proxyAuthKey = AuthenticationInfo.getProxyAuthKey(host, port, realm, authScheme);
ret = AuthenticationInfo.getProxyAuth(proxyAuthKey);
if (ret == null) {
switch (authScheme) {
case BASIC:
InetAddress addr = null;
try {
final String finalHost = host;
addr = java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction<InetAddress>() {
public InetAddress run()
throws java.net.UnknownHostException {
return InetAddress.getByName(finalHost);
}
});
} catch (java.security.PrivilegedActionException ignored) {
// User will have an unknown host.
}
PasswordAuthentication a =
privilegedRequestPasswordAuthentication(
host, addr, port, "http",
realm, scheme, url, RequestorType.PROXY);
if (a != null) {
ret = new BasicAuthentication(true, host, port, realm, a);
}
break;
case DIGEST:
a = privilegedRequestPasswordAuthentication(
host, null, port, url.getProtocol(),
realm, scheme, url, RequestorType.PROXY);
if (a != null) {
DigestAuthentication.Parameters params =
new DigestAuthentication.Parameters();
ret = new DigestAuthentication(true, host, port, realm,
scheme, a, params);
}
break;
case NTLM:
if (NTLMAuthenticationProxy.supported) {
/* tryTransparentNTLMProxy will always be true the first
* time around, but verify that the platform supports it
* otherwise don't try. */
if (tryTransparentNTLMProxy) {
tryTransparentNTLMProxy =
NTLMAuthenticationProxy.supportsTransparentAuth;
/* If the platform supports transparent authentication
* then normally it's ok to do transparent auth to a proxy
* because we generally trust proxies (chosen by the user)
* But not in the case of 305 response where the server
* chose it. */
if (tryTransparentNTLMProxy && useProxyResponseCode) {
tryTransparentNTLMProxy = false;
}
}
a = null;
if (tryTransparentNTLMProxy) {
logger.finest("Trying Transparent NTLM authentication");
} else {
a = privilegedRequestPasswordAuthentication(
host, null, port, url.getProtocol(),
"", scheme, url, RequestorType.PROXY);
}
/* If we are not trying transparent authentication then
* we need to have a PasswordAuthentication instance. For
* transparent authentication (Windows only) the username
* and password will be picked up from the current logged
* on users credentials.
*/
if (tryTransparentNTLMProxy ||
(!tryTransparentNTLMProxy && a != null)) {
ret = NTLMAuthenticationProxy.proxy.create(true, host, port, a);
}
/* set to false so that we do not try again */
tryTransparentNTLMProxy = false;
}
break;
case NEGOTIATE:
ret = new NegotiateAuthentication(new HttpCallerInfo(authhdr.getHttpCallerInfo(), "Negotiate"));
break;
case KERBEROS:
ret = new NegotiateAuthentication(new HttpCallerInfo(authhdr.getHttpCallerInfo(), "Kerberos"));
break;
case UNKNOWN:
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Unknown/Unsupported authentication scheme: " + scheme);
}
/*fall through*/
default:
throw new AssertionError("should not reach here");
}
}
// For backwards compatibility, we also try defaultAuth
// REMIND: Get rid of this for JDK2.0.
if (ret == null && defaultAuth != null
&& defaultAuth.schemeSupported(scheme)) {
try {
URL u = new URL("http", host, port, "/");
String a = defaultAuth.authString(u, scheme, realm);
if (a != null) {
ret = new BasicAuthentication (true, host, port, realm, a);
// not in cache by default - cache on success
}
} catch (java.net.MalformedURLException ignored) {
}
}
if (ret != null) {
if (!ret.setHeaders(this, p, raw)) {
ret = null;
}
}
}
if (logger.isLoggable(PlatformLogger.Level.FINER)) {
logger.finer("Proxy Authentication for " + authhdr.toString() +" returned " + (ret != null ? ret.toString() : "null"));
}
return ret;
}
/**
* Gets the authentication for an HTTP server, and applies it to
* the connection.
* @param authHdr the AuthenticationHeader which tells what auth scheme is
* preferred.
*/
@SuppressWarnings("fallthrough")
private AuthenticationInfo getServerAuthentication (AuthenticationHeader authhdr) {
/* get authorization from authenticator */
AuthenticationInfo ret = null;
String raw = authhdr.raw();
/* When we get an NTLM auth from cache, don't set any special headers */
if (authhdr.isPresent()) {
HeaderParser p = authhdr.headerParser();
String realm = p.findValue("realm");
String scheme = authhdr.scheme();
AuthScheme authScheme = UNKNOWN;
if ("basic".equalsIgnoreCase(scheme)) {
authScheme = BASIC;
} else if ("digest".equalsIgnoreCase(scheme)) {
authScheme = DIGEST;
} else if ("ntlm".equalsIgnoreCase(scheme)) {
authScheme = NTLM;
doingNTLM2ndStage = true;
} else if ("Kerberos".equalsIgnoreCase(scheme)) {
authScheme = KERBEROS;
doingNTLM2ndStage = true;
} else if ("Negotiate".equalsIgnoreCase(scheme)) {
authScheme = NEGOTIATE;
doingNTLM2ndStage = true;
}
domain = p.findValue ("domain");
if (realm == null)
realm = "";
serverAuthKey = AuthenticationInfo.getServerAuthKey(url, realm, authScheme);
ret = AuthenticationInfo.getServerAuth(serverAuthKey);
InetAddress addr = null;
if (ret == null) {
try {
addr = InetAddress.getByName(url.getHost());
} catch (java.net.UnknownHostException ignored) {
// User will have addr = null
}
}
// replacing -1 with default port for a protocol
int port = url.getPort();
if (port == -1) {
port = url.getDefaultPort();
}
if (ret == null) {
switch(authScheme) {
case KERBEROS:
ret = new NegotiateAuthentication(new HttpCallerInfo(authhdr.getHttpCallerInfo(), "Kerberos"));
break;
case NEGOTIATE:
ret = new NegotiateAuthentication(new HttpCallerInfo(authhdr.getHttpCallerInfo(), "Negotiate"));
break;
case BASIC:
PasswordAuthentication a =
privilegedRequestPasswordAuthentication(
url.getHost(), addr, port, url.getProtocol(),
realm, scheme, url, RequestorType.SERVER);
if (a != null) {
ret = new BasicAuthentication(false, url, realm, a);
}
break;
case DIGEST:
a = privilegedRequestPasswordAuthentication(
url.getHost(), addr, port, url.getProtocol(),
realm, scheme, url, RequestorType.SERVER);
if (a != null) {
digestparams = new DigestAuthentication.Parameters();
ret = new DigestAuthentication(false, url, realm, scheme, a, digestparams);
}
break;
case NTLM:
if (NTLMAuthenticationProxy.supported) {
URL url1;
try {
url1 = new URL (url, "/"); /* truncate the path */
} catch (Exception e) {
url1 = url;
}
/* tryTransparentNTLMServer will always be true the first
* time around, but verify that the platform supports it
* otherwise don't try. */
if (tryTransparentNTLMServer) {
tryTransparentNTLMServer =
NTLMAuthenticationProxy.supportsTransparentAuth;
/* If the platform supports transparent authentication
* then check if we are in a secure environment
* whether, or not, we should try transparent authentication.*/
if (tryTransparentNTLMServer) {
tryTransparentNTLMServer =
NTLMAuthenticationProxy.isTrustedSite(url);
}
}
a = null;
if (tryTransparentNTLMServer) {
logger.finest("Trying Transparent NTLM authentication");
} else {
a = privilegedRequestPasswordAuthentication(
url.getHost(), addr, port, url.getProtocol(),
"", scheme, url, RequestorType.SERVER);
}
/* If we are not trying transparent authentication then
* we need to have a PasswordAuthentication instance. For
* transparent authentication (Windows only) the username
* and password will be picked up from the current logged
* on users credentials.
*/
if (tryTransparentNTLMServer ||
(!tryTransparentNTLMServer && a != null)) {
ret = NTLMAuthenticationProxy.proxy.create(false, url1, a);
}
/* set to false so that we do not try again */
tryTransparentNTLMServer = false;
}
break;
case UNKNOWN:
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Unknown/Unsupported authentication scheme: " + scheme);
}
/*fall through*/
default:
throw new AssertionError("should not reach here");
}
}
// For backwards compatibility, we also try defaultAuth
// REMIND: Get rid of this for JDK2.0.
if (ret == null && defaultAuth != null
&& defaultAuth.schemeSupported(scheme)) {
String a = defaultAuth.authString(url, scheme, realm);
if (a != null) {
ret = new BasicAuthentication (false, url, realm, a);
// not in cache by default - cache on success
}
}
if (ret != null ) {
if (!ret.setHeaders(this, p, raw)) {
ret = null;
}
}
}
if (logger.isLoggable(PlatformLogger.Level.FINER)) {
logger.finer("Server Authentication for " + authhdr.toString() +" returned " + (ret != null ? ret.toString() : "null"));
}
return ret;
}
/* inclose will be true if called from close(), in which case we
* force the call to check because this is the last chance to do so.
* If not in close(), then the authentication info could arrive in a trailer
* field, which we have not read yet.
*/
private void checkResponseCredentials (boolean inClose) throws IOException {
try {
if (!needToCheck)
return;
if ((validateProxy && currentProxyCredentials != null) &&
(currentProxyCredentials instanceof DigestAuthentication)) {
String raw = responses.findValue ("Proxy-Authentication-Info");
if (inClose || (raw != null)) {
DigestAuthentication da = (DigestAuthentication)
currentProxyCredentials;
da.checkResponse (raw, method, getRequestURI());
currentProxyCredentials = null;
}
}
if ((validateServer && currentServerCredentials != null) &&
(currentServerCredentials instanceof DigestAuthentication)) {
String raw = responses.findValue ("Authentication-Info");
if (inClose || (raw != null)) {
DigestAuthentication da = (DigestAuthentication)
currentServerCredentials;
da.checkResponse (raw, method, url);
currentServerCredentials = null;
}
}
if ((currentServerCredentials==null) && (currentProxyCredentials == null)) {
needToCheck = false;
}
} catch (IOException e) {
disconnectInternal();
connected = false;
throw e;
}
}
/* The request URI used in the request line for this request.
* Also, needed for digest authentication
*/
String requestURI = null;
String getRequestURI() throws IOException {
if (requestURI == null) {
requestURI = http.getURLFile();
}
return requestURI;
}
/* Tells us whether to follow a redirect. If so, it
* closes the connection (break any keep-alive) and
* resets the url, re-connects, and resets the request
* property.
*/
private boolean followRedirect() throws IOException {
if (!getInstanceFollowRedirects()) {
return false;
}
final int stat = getResponseCode();
if (stat < 300 || stat > 307 || stat == 306
|| stat == HTTP_NOT_MODIFIED) {
return false;
}
final String loc = getHeaderField("Location");
if (loc == null) {
/* this should be present - if not, we have no choice
* but to go forward w/ the response we got
*/
return false;
}
URL locUrl;
try {
locUrl = new URL(loc);
if (!url.getProtocol().equalsIgnoreCase(locUrl.getProtocol())) {
return false;
}
} catch (MalformedURLException mue) {
// treat loc as a relative URI to conform to popular browsers
locUrl = new URL(url, loc);
}
final URL locUrl0 = locUrl;
socketPermission = null; // force recalculation
SocketPermission p = URLtoSocketPermission(locUrl);
if (p != null) {
try {
return AccessController.doPrivilegedWithCombiner(
new PrivilegedExceptionAction<Boolean>() {
public Boolean run() throws IOException {
return followRedirect0(loc, stat, locUrl0);
}
}, null, p
);
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
} else {
// run without additional permission
return followRedirect0(loc, stat, locUrl);
}
}
/* Tells us whether to follow a redirect. If so, it
* closes the connection (break any keep-alive) and
* resets the url, re-connects, and resets the request
* property.
*/
private boolean followRedirect0(String loc, int stat, URL locUrl)
throws IOException
{
disconnectInternal();
if (streaming()) {
throw new HttpRetryException (RETRY_MSG3, stat, loc);
}
if (logger.isLoggable(PlatformLogger.Level.FINE)) {
logger.fine("Redirected from " + url + " to " + locUrl);
}
// clear out old response headers!!!!
responses = new MessageHeader();
if (stat == HTTP_USE_PROXY) {
/* This means we must re-request the resource through the
* proxy denoted in the "Location:" field of the response.
* Judging by the spec, the string in the Location header
* _should_ denote a URL - let's hope for "http://my.proxy.org"
* Make a new HttpClient to the proxy, using HttpClient's
* Instance-specific proxy fields, but note we're still fetching
* the same URL.
*/
String proxyHost = locUrl.getHost();
int proxyPort = locUrl.getPort();
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkConnect(proxyHost, proxyPort);
}
setProxiedClient (url, proxyHost, proxyPort);
requests.set(0, method + " " + getRequestURI()+" " +
httpVersion, null);
connected = true;
// need to remember this in case NTLM proxy authentication gets
// used. We can't use transparent authentication when user
// doesn't know about proxy.
useProxyResponseCode = true;
} else {
// maintain previous headers, just change the name
// of the file we're getting
url = locUrl;
requestURI = null; // force it to be recalculated
if (method.equals("POST") && !Boolean.getBoolean("http.strictPostRedirect") && (stat!=307)) {
/* The HTTP/1.1 spec says that a redirect from a POST
* *should not* be immediately turned into a GET, and
* that some HTTP/1.0 clients incorrectly did this.
* Correct behavior redirects a POST to another POST.
* Unfortunately, since most browsers have this incorrect
* behavior, the web works this way now. Typical usage
* seems to be:
* POST a login code or passwd to a web page.
* after validation, the server redirects to another
* (welcome) page
* The second request is (erroneously) expected to be GET
*
* We will do the incorrect thing (POST-->GET) by default.
* We will provide the capability to do the "right" thing
* (POST-->POST) by a system property, "http.strictPostRedirect=true"
*/
requests = new MessageHeader();
setRequests = false;
super.setRequestMethod("GET"); // avoid the connecting check
poster = null;
if (!checkReuseConnection())
connect();
} else {
if (!checkReuseConnection())
connect();
/* Even after a connect() call, http variable still can be
* null, if a ResponseCache has been installed and it returns
* a non-null CacheResponse instance. So check nullity before using it.
*
* And further, if http is null, there's no need to do anything
* about request headers because successive http session will use
* cachedInputStream/cachedHeaders anyway, which is returned by
* CacheResponse.
*/
if (http != null) {
requests.set(0, method + " " + getRequestURI()+" " +
httpVersion, null);
int port = url.getPort();
String host = url.getHost();
if (port != -1 && port != url.getDefaultPort()) {
host += ":" + String.valueOf(port);
}
requests.set("Host", host);
}
}
}
return true;
}
/* dummy byte buffer for reading off socket prior to closing */
byte[] cdata = new byte [128];
/**
* Reset (without disconnecting the TCP conn) in order to do another transaction with this instance
*/
private void reset() throws IOException {
http.reuse = true;
/* must save before calling close */
reuseClient = http;
InputStream is = http.getInputStream();
if (!method.equals("HEAD")) {
try {
/* we want to read the rest of the response without using the
* hurry mechanism, because that would close the connection
* if everything is not available immediately
*/
if ((is instanceof ChunkedInputStream) ||
(is instanceof MeteredStream)) {
/* reading until eof will not block */
while (is.read (cdata) > 0) {}
} else {
/* raw stream, which will block on read, so only read
* the expected number of bytes, probably 0
*/
long cl = 0;
int n = 0;
String cls = responses.findValue ("Content-Length");
if (cls != null) {
try {
cl = Long.parseLong (cls);
} catch (NumberFormatException e) {
cl = 0;
}
}
for (long i=0; i<cl; ) {
if ((n = is.read (cdata)) == -1) {
break;
} else {
i+= n;
}
}
}
} catch (IOException e) {
http.reuse = false;
reuseClient = null;
disconnectInternal();
return;
}
try {
if (is instanceof MeteredStream) {
is.close();
}
} catch (IOException e) { }
}
responseCode = -1;
responses = new MessageHeader();
connected = false;
}
/**
* Disconnect from the web server at the first 401 error. Do not
* disconnect when using a proxy, a good proxy should have already
* closed the connection to the web server.
*/
private void disconnectWeb() throws IOException {
if (usingProxy() && http.isKeepingAlive()) {
responseCode = -1;
// clean up, particularly, skip the content part
// of a 401 error response
reset();
} else {
disconnectInternal();
}
}
/**
* Disconnect from the server (for internal use)
*/
private void disconnectInternal() {
responseCode = -1;
inputStream = null;
if (pi != null) {
pi.finishTracking();
pi = null;
}
if (http != null) {
http.closeServer();
http = null;
connected = false;
}
}
/**
* Disconnect from the server (public API)
*/
public void disconnect() {
responseCode = -1;
if (pi != null) {
pi.finishTracking();
pi = null;
}
if (http != null) {
/*
* If we have an input stream this means we received a response
* from the server. That stream may have been read to EOF and
* dependening on the stream type may already be closed or the
* the http client may be returned to the keep-alive cache.
* If the http client has been returned to the keep-alive cache
* it may be closed (idle timeout) or may be allocated to
* another request.
*
* In other to avoid timing issues we close the input stream
* which will either close the underlying connection or return
* the client to the cache. If there's a possibility that the
* client has been returned to the cache (ie: stream is a keep
* alive stream or a chunked input stream) then we remove an
* idle connection to the server. Note that this approach
* can be considered an approximation in that we may close a
* different idle connection to that used by the request.
* Additionally it's possible that we close two connections
* - the first becuase it wasn't an EOF (and couldn't be
* hurried) - the second, another idle connection to the
* same server. The is okay because "disconnect" is an
* indication that the application doesn't intend to access
* this http server for a while.
*/
if (inputStream != null) {
HttpClient hc = http;
// un-synchronized
boolean ka = hc.isKeepingAlive();
try {
inputStream.close();
} catch (IOException ioe) { }
// if the connection is persistent it may have been closed
// or returned to the keep-alive cache. If it's been returned
// to the keep-alive cache then we would like to close it
// but it may have been allocated
if (ka) {
hc.closeIdleConnection();
}
} else {
// We are deliberatly being disconnected so HttpClient
// should not try to resend the request no matter what stage
// of the connection we are in.
http.setDoNotRetry(true);
http.closeServer();
}
// poster = null;
http = null;
connected = false;
}
cachedInputStream = null;
if (cachedHeaders != null) {
cachedHeaders.reset();
}
}
public boolean usingProxy() {
if (http != null) {
return (http.getProxyHostUsed() != null);
}
return false;
}
// constant strings represent set-cookie header names
private final static String SET_COOKIE = "set-cookie";
private final static String SET_COOKIE2 = "set-cookie2";
/**
* Returns a filtered version of the given headers value.
*
* Note: The implementation currently only filters out HttpOnly cookies
* from Set-Cookie and Set-Cookie2 headers.
*/
private String filterHeaderField(String name, String value) {
if (value == null)
return null;
if (SET_COOKIE.equalsIgnoreCase(name) ||
SET_COOKIE2.equalsIgnoreCase(name)) {
// Filtering only if there is a cookie handler. [Assumption: the
// cookie handler will store/retrieve the HttpOnly cookies]
if (cookieHandler == null || value.length() == 0)
return value;
sun.misc.JavaNetHttpCookieAccess access =
sun.misc.SharedSecrets.getJavaNetHttpCookieAccess();
StringBuilder retValue = new StringBuilder();
List<HttpCookie> cookies = access.parse(value);
boolean multipleCookies = false;
for (HttpCookie cookie : cookies) {
// skip HttpOnly cookies
if (cookie.isHttpOnly())
continue;
if (multipleCookies)
retValue.append(','); // RFC 2965, comma separated
retValue.append(access.header(cookie));
multipleCookies = true;
}
return retValue.length() == 0 ? "" : retValue.toString();
}
return value;
}
// Cache the filtered response headers so that they don't need
// to be generated for every getHeaderFields() call.
private Map<String, List<String>> filteredHeaders; // null
private Map<String, List<String>> getFilteredHeaderFields() {
if (filteredHeaders != null)
return filteredHeaders;
Map<String, List<String>> headers, tmpMap = new HashMap<>();
if (cachedHeaders != null)
headers = cachedHeaders.getHeaders();
else
headers = responses.getHeaders();
for (Map.Entry<String, List<String>> e: headers.entrySet()) {
String key = e.getKey();
List<String> values = e.getValue(), filteredVals = new ArrayList<>();
for (String value : values) {
String fVal = filterHeaderField(key, value);
if (fVal != null)
filteredVals.add(fVal);
}
if (!filteredVals.isEmpty())
tmpMap.put(key, Collections.unmodifiableList(filteredVals));
}
return filteredHeaders = Collections.unmodifiableMap(tmpMap);
}
/**
* Gets a header field by name. Returns null if not known.
* @param name the name of the header field
*/
@Override
public String getHeaderField(String name) {
try {
getInputStream();
} catch (IOException e) {}
if (cachedHeaders != null) {
return filterHeaderField(name, cachedHeaders.findValue(name));
}
return filterHeaderField(name, responses.findValue(name));
}
/**
* Returns an unmodifiable Map of the header fields.
* The Map keys are Strings that represent the
* response-header field names. Each Map value is an
* unmodifiable List of Strings that represents
* the corresponding field values.
*
* @return a Map of header fields
* @since 1.4
*/
@Override
public Map<String, List<String>> getHeaderFields() {
try {
getInputStream();
} catch (IOException e) {}
return getFilteredHeaderFields();
}
/**
* Gets a header field by index. Returns null if not known.
* @param n the index of the header field
*/
@Override
public String getHeaderField(int n) {
try {
getInputStream();
} catch (IOException e) {}
if (cachedHeaders != null) {
return filterHeaderField(cachedHeaders.getKey(n),
cachedHeaders.getValue(n));
}
return filterHeaderField(responses.getKey(n), responses.getValue(n));
}
/**
* Gets a header field by index. Returns null if not known.
* @param n the index of the header field
*/
@Override
public String getHeaderFieldKey(int n) {
try {
getInputStream();
} catch (IOException e) {}
if (cachedHeaders != null) {
return cachedHeaders.getKey(n);
}
return responses.getKey(n);
}
/**
* Sets request property. If a property with the key already
* exists, overwrite its value with the new value.
* @param value the value to be set
*/
@Override
public synchronized void setRequestProperty(String key, String value) {
if (connected || connecting)
throw new IllegalStateException("Already connected");
if (key == null)
throw new NullPointerException ("key is null");
if (isExternalMessageHeaderAllowed(key, value)) {
requests.set(key, value);
if (!key.equalsIgnoreCase("Content-Type")) {
userHeaders.set(key, value);
}
}
}
MessageHeader getUserSetHeaders() {
return userHeaders;
}
/**
* Adds a general request property specified by a
* key-value pair. This method will not overwrite
* existing values associated with the same key.
*
* @param key the keyword by which the request is known
* (e.g., "<code>accept</code>").
* @param value the value associated with it.
* @see #getRequestProperties(java.lang.String)
* @since 1.4
*/
@Override
public synchronized void addRequestProperty(String key, String value) {
if (connected || connecting)
throw new IllegalStateException("Already connected");
if (key == null)
throw new NullPointerException ("key is null");
if (isExternalMessageHeaderAllowed(key, value)) {
requests.add(key, value);
if (!key.equalsIgnoreCase("Content-Type")) {
userHeaders.add(key, value);
}
}
}
//
// Set a property for authentication. This can safely disregard
// the connected test.
//
public void setAuthenticationProperty(String key, String value) {
checkMessageHeader(key, value);
requests.set(key, value);
}
@Override
public synchronized String getRequestProperty (String key) {
if (key == null) {
return null;
}
// don't return headers containing security sensitive information
for (int i=0; i < EXCLUDE_HEADERS.length; i++) {
if (key.equalsIgnoreCase(EXCLUDE_HEADERS[i])) {
return null;
}
}
if (!setUserCookies) {
if (key.equalsIgnoreCase("Cookie")) {
return userCookies;
}
if (key.equalsIgnoreCase("Cookie2")) {
return userCookies2;
}
}
return requests.findValue(key);
}
/**
* Returns an unmodifiable Map of general request
* properties for this connection. The Map keys
* are Strings that represent the request-header
* field names. Each Map value is a unmodifiable List
* of Strings that represents the corresponding
* field values.
*
* @return a Map of the general request properties for this connection.
* @throws IllegalStateException if already connected
* @since 1.4
*/
@Override
public synchronized Map<String, List<String>> getRequestProperties() {
if (connected)
throw new IllegalStateException("Already connected");
// exclude headers containing security-sensitive info
if (setUserCookies) {
return requests.getHeaders(EXCLUDE_HEADERS);
}
/*
* The cookies in the requests message headers may have
* been modified. Use the saved user cookies instead.
*/
Map<String, List<String>> userCookiesMap = null;
if (userCookies != null || userCookies2 != null) {
userCookiesMap = new HashMap<>();
if (userCookies != null) {
userCookiesMap.put("Cookie", Arrays.asList(userCookies));
}
if (userCookies2 != null) {
userCookiesMap.put("Cookie2", Arrays.asList(userCookies2));
}
}
return requests.filterAndAddHeaders(EXCLUDE_HEADERS2, userCookiesMap);
}
@Override
public void setConnectTimeout(int timeout) {
if (timeout < 0)
throw new IllegalArgumentException("timeouts can't be negative");
connectTimeout = timeout;
}
/**
* Returns setting for connect timeout.
* <p>
* 0 return implies that the option is disabled
* (i.e., timeout of infinity).
*
* @return an <code>int</code> that indicates the connect timeout
* value in milliseconds
* @see java.net.URLConnection#setConnectTimeout(int)
* @see java.net.URLConnection#connect()
* @since 1.5
*/
@Override
public int getConnectTimeout() {
return (connectTimeout < 0 ? 0 : connectTimeout);
}
/**
* Sets the read timeout to a specified timeout, in
* milliseconds. A non-zero value specifies the timeout when
* reading from Input stream when a connection is established to a
* resource. If the timeout expires before there is data available
* for read, a java.net.SocketTimeoutException is raised. A
* timeout of zero is interpreted as an infinite timeout.
*
* <p> Some non-standard implementation of this method ignores the
* specified timeout. To see the read timeout set, please call
* getReadTimeout().
*
* @param timeout an <code>int</code> that specifies the timeout
* value to be used in milliseconds
* @throws IllegalArgumentException if the timeout parameter is negative
*
* @see java.net.URLConnectiongetReadTimeout()
* @see java.io.InputStream#read()
* @since 1.5
*/
@Override
public void setReadTimeout(int timeout) {
if (timeout < 0)
throw new IllegalArgumentException("timeouts can't be negative");
readTimeout = timeout;
}
/**
* Returns setting for read timeout. 0 return implies that the
* option is disabled (i.e., timeout of infinity).
*
* @return an <code>int</code> that indicates the read timeout
* value in milliseconds
*
* @see java.net.URLConnection#setReadTimeout(int)
* @see java.io.InputStream#read()
* @since 1.5
*/
@Override
public int getReadTimeout() {
return readTimeout < 0 ? 0 : readTimeout;
}
public CookieHandler getCookieHandler() {
return cookieHandler;
}
String getMethod() {
return method;
}
private MessageHeader mapToMessageHeader(Map<String, List<String>> map) {
MessageHeader headers = new MessageHeader();
if (map == null || map.isEmpty()) {
return headers;
}
for (Map.Entry<String, List<String>> entry : map.entrySet()) {
String key = entry.getKey();
List<String> values = entry.getValue();
for (String value : values) {
if (key == null) {
headers.prepend(key, value);
} else {
headers.add(key, value);
}
}
}
return headers;
}
/* The purpose of this wrapper is just to capture the close() call
* so we can check authentication information that may have
* arrived in a Trailer field
*/
class HttpInputStream extends FilterInputStream {
private CacheRequest cacheRequest;
private OutputStream outputStream;
private boolean marked = false;
private int inCache = 0;
private int markCount = 0;
private boolean closed; // false
public HttpInputStream (InputStream is) {
super (is);
this.cacheRequest = null;
this.outputStream = null;
}
public HttpInputStream (InputStream is, CacheRequest cacheRequest) {
super (is);
this.cacheRequest = cacheRequest;
try {
this.outputStream = cacheRequest.getBody();
} catch (IOException ioex) {
this.cacheRequest.abort();
this.cacheRequest = null;
this.outputStream = null;
}
}
/**
* Marks the current position in this input stream. A subsequent
* call to the <code>reset</code> method repositions this stream at
* the last marked position so that subsequent reads re-read the same
* bytes.
* <p>
* The <code>readlimit</code> argument tells this input stream to
* allow that many bytes to be read before the mark position gets
* invalidated.
* <p>
* This method simply performs <code>in.mark(readlimit)</code>.
*
* @param readlimit the maximum limit of bytes that can be read before
* the mark position becomes invalid.
* @see java.io.FilterInputStream#in
* @see java.io.FilterInputStream#reset()
*/
@Override
public synchronized void mark(int readlimit) {
super.mark(readlimit);
if (cacheRequest != null) {
marked = true;
markCount = 0;
}
}
/**
* Repositions this stream to the position at the time the
* <code>mark</code> method was last called on this input stream.
* <p>
* This method
* simply performs <code>in.reset()</code>.
* <p>
* Stream marks are intended to be used in
* situations where you need to read ahead a little to see what's in
* the stream. Often this is most easily done by invoking some
* general parser. If the stream is of the type handled by the
* parse, it just chugs along happily. If the stream is not of
* that type, the parser should toss an exception when it fails.
* If this happens within readlimit bytes, it allows the outer
* code to reset the stream and try another parser.
*
* @exception IOException if the stream has not been marked or if the
* mark has been invalidated.
* @see java.io.FilterInputStream#in
* @see java.io.FilterInputStream#mark(int)
*/
@Override
public synchronized void reset() throws IOException {
super.reset();
if (cacheRequest != null) {
marked = false;
inCache += markCount;
}
}
private void ensureOpen() throws IOException {
if (closed)
throw new IOException("stream is closed");
}
@Override
public int read() throws IOException {
ensureOpen();
try {
byte[] b = new byte[1];
int ret = read(b);
return (ret == -1? ret : (b[0] & 0x00FF));
} catch (IOException ioex) {
if (cacheRequest != null) {
cacheRequest.abort();
}
throw ioex;
}
}
@Override
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
ensureOpen();
try {
int newLen = super.read(b, off, len);
int nWrite;
// write to cache
if (inCache > 0) {
if (inCache >= newLen) {
inCache -= newLen;
nWrite = 0;
} else {
nWrite = newLen - inCache;
inCache = 0;
}
} else {
nWrite = newLen;
}
if (nWrite > 0 && outputStream != null)
outputStream.write(b, off + (newLen-nWrite), nWrite);
if (marked) {
markCount += newLen;
}
return newLen;
} catch (IOException ioex) {
if (cacheRequest != null) {
cacheRequest.abort();
}
throw ioex;
}
}
/* skip() calls read() in order to ensure that entire response gets
* cached. same implementation as InputStream.skip */
private byte[] skipBuffer;
private static final int SKIP_BUFFER_SIZE = 8096;
@Override
public long skip (long n) throws IOException {
ensureOpen();
long remaining = n;
int nr;
if (skipBuffer == null)
skipBuffer = new byte[SKIP_BUFFER_SIZE];
byte[] localSkipBuffer = skipBuffer;
if (n <= 0) {
return 0;
}
while (remaining > 0) {
nr = read(localSkipBuffer, 0,
(int) Math.min(SKIP_BUFFER_SIZE, remaining));
if (nr < 0) {
break;
}
remaining -= nr;
}
return n - remaining;
}
@Override
public void close () throws IOException {
if (closed)
return;
try {
if (outputStream != null) {
if (read() != -1) {
cacheRequest.abort();
} else {
outputStream.close();
}
}
super.close ();
} catch (IOException ioex) {
if (cacheRequest != null) {
cacheRequest.abort();
}
throw ioex;
} finally {
closed = true;
HttpURLConnection.this.http = null;
checkResponseCredentials (true);
}
}
}
class StreamingOutputStream extends FilterOutputStream {
long expected;
long written;
boolean closed;
boolean error;
IOException errorExcp;
/**
* expectedLength == -1 if the stream is chunked
* expectedLength > 0 if the stream is fixed content-length
* In the 2nd case, we make sure the expected number of
* of bytes are actually written
*/
StreamingOutputStream (OutputStream os, long expectedLength) {
super (os);
expected = expectedLength;
written = 0L;
closed = false;
error = false;
}
@Override
public void write (int b) throws IOException {
checkError();
written ++;
if (expected != -1L && written > expected) {
throw new IOException ("too many bytes written");
}
out.write (b);
}
@Override
public void write (byte[] b) throws IOException {
write (b, 0, b.length);
}
@Override
public void write (byte[] b, int off, int len) throws IOException {
checkError();
written += len;
if (expected != -1L && written > expected) {
out.close ();
throw new IOException ("too many bytes written");
}
out.write (b, off, len);
}
void checkError () throws IOException {
if (closed) {
throw new IOException ("Stream is closed");
}
if (error) {
throw errorExcp;
}
if (((PrintStream)out).checkError()) {
throw new IOException("Error writing request body to server");
}
}
/* this is called to check that all the bytes
* that were supposed to be written were written
* and that the stream is now closed().
*/
boolean writtenOK () {
return closed && ! error;
}
@Override
public void close () throws IOException {
if (closed) {
return;
}
closed = true;
if (expected != -1L) {
/* not chunked */
if (written != expected) {
error = true;
errorExcp = new IOException ("insufficient data written");
out.close ();
throw errorExcp;
}
super.flush(); /* can't close the socket */
} else {
/* chunked */
super.close (); /* force final chunk to be written */
/* trailing \r\n */
OutputStream o = http.getOutputStream();
o.write ('\r');
o.write ('\n');
o.flush();
}
}
}
static class ErrorStream extends InputStream {
ByteBuffer buffer;
InputStream is;
private ErrorStream(ByteBuffer buf) {
buffer = buf;
is = null;
}
private ErrorStream(ByteBuffer buf, InputStream is) {
buffer = buf;
this.is = is;
}
// when this method is called, it's either the case that cl > 0, or
// if chunk-encoded, cl = -1; in other words, cl can't be 0
public static InputStream getErrorStream(InputStream is, long cl, HttpClient http) {
// cl can't be 0; this following is here for extra precaution
if (cl == 0) {
return null;
}
try {
// set SO_TIMEOUT to 1/5th of the total timeout
// remember the old timeout value so that we can restore it
int oldTimeout = http.getReadTimeout();
http.setReadTimeout(timeout4ESBuffer/5);
long expected = 0;
boolean isChunked = false;
// the chunked case
if (cl < 0) {
expected = bufSize4ES;
isChunked = true;
} else {
expected = cl;
}
if (expected <= bufSize4ES) {
int exp = (int) expected;
byte[] buffer = new byte[exp];
int count = 0, time = 0, len = 0;
do {
try {
len = is.read(buffer, count,
buffer.length - count);
if (len < 0) {
if (isChunked) {
// chunked ended
// if chunked ended prematurely,
// an IOException would be thrown
break;
}
// the server sends less than cl bytes of data
throw new IOException("the server closes"+
" before sending "+cl+
" bytes of data");
}
count += len;
} catch (SocketTimeoutException ex) {
time += timeout4ESBuffer/5;
}
} while (count < exp && time < timeout4ESBuffer);
// reset SO_TIMEOUT to old value
http.setReadTimeout(oldTimeout);
// if count < cl at this point, we will not try to reuse
// the connection
if (count == 0) {
// since we haven't read anything,
// we will return the underlying
// inputstream back to the application
return null;
} else if ((count == expected && !(isChunked)) || (isChunked && len <0)) {
// put the connection into keep-alive cache
// the inputstream will try to do the right thing
is.close();
return new ErrorStream(ByteBuffer.wrap(buffer, 0, count));
} else {
// we read part of the response body
return new ErrorStream(
ByteBuffer.wrap(buffer, 0, count), is);
}
}
return null;
} catch (IOException ioex) {
// ioex.printStackTrace();
return null;
}
}
@Override
public int available() throws IOException {
if (is == null) {
return buffer.remaining();
} else {
return buffer.remaining()+is.available();
}
}
public int read() throws IOException {
byte[] b = new byte[1];
int ret = read(b);
return (ret == -1? ret : (b[0] & 0x00FF));
}
@Override
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int rem = buffer.remaining();
if (rem > 0) {
int ret = rem < len? rem : len;
buffer.get(b, off, ret);
return ret;
} else {
if (is == null) {
return -1;
} else {
return is.read(b, off, len);
}
}
}
@Override
public void close() throws IOException {
buffer = null;
if (is != null) {
is.close();
}
}
}
}
/** An input stream that just returns EOF. This is for
* HTTP URLConnections that are KeepAlive && use the
* HEAD method - i.e., stream not dead, but nothing to be read.
*/
class EmptyInputStream extends InputStream {
@Override
public int available() {
return 0;
}
public int read() {
return -1;
}
}
