/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.volley.toolbox;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import com.android.volley.Cache;
import com.android.volley.Header;
import com.android.volley.NetworkResponse;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
@RunWith(RobolectricTestRunner.class)
public class HttpHeaderParserTest {
private static long ONE_MINUTE_MILLIS = 1000L * 60;
private static long ONE_HOUR_MILLIS = 1000L * 60 * 60;
private static long ONE_DAY_MILLIS = ONE_HOUR_MILLIS * 24;
private static long ONE_WEEK_MILLIS = ONE_DAY_MILLIS * 7;
private NetworkResponse response;
private Map<String, String> headers;
@Before
public void setUp() throws Exception {
headers = new HashMap<String, String>();
response = new NetworkResponse(0, null, headers, false);
}
@Test
public void parseCacheHeaders_noHeaders() {
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEquals(0, entry.serverDate);
assertEquals(0, entry.lastModified);
assertEquals(0, entry.ttl);
assertEquals(0, entry.softTtl);
}
@Test
public void parseCacheHeaders_nullHeaders() {
response = new NetworkResponse(0, null, null, false);
assertNull(HttpHeaderParser.parseCacheHeaders(response));
}
@Test
public void parseCacheHeaders_headersSet() {
headers.put("MyCustomHeader", "42");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNotNull(entry.responseHeaders);
assertEquals(1, entry.responseHeaders.size());
assertEquals("42", entry.responseHeaders.get("MyCustomHeader"));
}
@Test
public void parseCacheHeaders_etag() {
headers.put("ETag", "Yow!");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertEquals("Yow!", entry.etag);
}
@Test
public void parseCacheHeaders_normalExpire() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Last-Modified", rfc1123Date(now - ONE_DAY_MILLIS));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(entry.serverDate, now, ONE_MINUTE_MILLIS);
assertEqualsWithin(entry.lastModified, (now - ONE_DAY_MILLIS), ONE_MINUTE_MILLIS);
assertTrue(entry.softTtl >= (now + ONE_HOUR_MILLIS));
assertTrue(entry.ttl == entry.softTtl);
}
@Test
public void parseCacheHeaders_expiresInPast() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now - ONE_HOUR_MILLIS));
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(entry.serverDate, now, ONE_MINUTE_MILLIS);
assertEquals(0, entry.ttl);
assertEquals(0, entry.softTtl);
}
@Test
public void parseCacheHeaders_serverRelative() {
long now = System.currentTimeMillis();
// Set "current" date as one hour in the future
headers.put("Date", rfc1123Date(now + ONE_HOUR_MILLIS));
// TTL four hours in the future, so should be three hours from now
headers.put("Expires", rfc1123Date(now + 4 * ONE_HOUR_MILLIS));
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertEqualsWithin(now + 3 * ONE_HOUR_MILLIS, entry.ttl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
}
@Test
public void parseCacheHeaders_cacheControlOverridesExpires() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
headers.put("Cache-Control", "public, max-age=86400");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(now + ONE_DAY_MILLIS, entry.ttl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
}
@Test
public void testParseCacheHeaders_staleWhileRevalidate() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
// - max-age (entry.softTtl) indicates that the asset is fresh for 1 day
// - stale-while-revalidate (entry.ttl) indicates that the asset may
// continue to be served stale for up to additional 7 days
headers.put("Cache-Control", "max-age=86400, stale-while-revalidate=604800");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(now + ONE_DAY_MILLIS, entry.softTtl, ONE_MINUTE_MILLIS);
assertEqualsWithin(now + ONE_DAY_MILLIS + ONE_WEEK_MILLIS, entry.ttl, ONE_MINUTE_MILLIS);
}
@Test
public void parseCacheHeaders_cacheControlNoCache() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
headers.put("Cache-Control", "no-cache");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNull(entry);
}
@Test
public void parseCacheHeaders_cacheControlMustRevalidateNoMaxAge() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
headers.put("Cache-Control", "must-revalidate");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(now, entry.ttl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
}
@Test
public void parseCacheHeaders_cacheControlMustRevalidateWithMaxAge() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
headers.put("Cache-Control", "must-revalidate, max-age=3600");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(now + ONE_HOUR_MILLIS, entry.ttl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
}
@Test
public void parseCacheHeaders_cacheControlMustRevalidateWithMaxAgeAndStale() {
long now = System.currentTimeMillis();
headers.put("Date", rfc1123Date(now));
headers.put("Expires", rfc1123Date(now + ONE_HOUR_MILLIS));
// - max-age (entry.softTtl) indicates that the asset is fresh for 1 day
// - stale-while-revalidate (entry.ttl) indicates that the asset may
// continue to be served stale for up to additional 7 days, but this is
// ignored in this case because of the must-revalidate header.
headers.put(
"Cache-Control", "must-revalidate, max-age=86400, stale-while-revalidate=604800");
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertNull(entry.etag);
assertEqualsWithin(now + ONE_DAY_MILLIS, entry.softTtl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
}
private void assertEqualsWithin(long expected, long value, long fudgeFactor) {
long diff = Math.abs(expected - value);
assertTrue(diff < fudgeFactor);
}
private static String rfc1123Date(long millis) {
DateFormat df = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.ENGLISH);
return df.format(new Date(millis));
}
// --------------------------
@Test
public void parseCharset() {
// Like the ones we usually see
headers.put("Content-Type", "text/plain; charset=utf-8");
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers));
// Charset specified, ignore default charset
headers.put("Content-Type", "text/plain; charset=utf-8");
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers, "ISO-8859-1"));
// Extra whitespace
headers.put("Content-Type", "text/plain; charset=utf-8 ");
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers));
// Extra parameters
headers.put("Content-Type", "text/plain; charset=utf-8; frozzle=bar");
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers));
// No Content-Type header
headers.clear();
assertEquals("ISO-8859-1", HttpHeaderParser.parseCharset(headers));
// No Content-Type header, use default charset
headers.clear();
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers, "utf-8"));
// Empty value
headers.put("Content-Type", "text/plain; charset=");
assertEquals("ISO-8859-1", HttpHeaderParser.parseCharset(headers));
// None specified
headers.put("Content-Type", "text/plain");
assertEquals("ISO-8859-1", HttpHeaderParser.parseCharset(headers));
// None charset specified, use default charset
headers.put("Content-Type", "application/json");
assertEquals("utf-8", HttpHeaderParser.parseCharset(headers, "utf-8"));
// None specified, extra semicolon
headers.put("Content-Type", "text/plain;");
assertEquals("ISO-8859-1", HttpHeaderParser.parseCharset(headers));
// No headers, use default charset
assertEquals("utf-8", HttpHeaderParser.parseCharset(null, "utf-8"));
}
@Test
public void parseCaseInsensitive() {
long now = System.currentTimeMillis();
List<Header> headers = new ArrayList<>();
headers.add(new Header("eTAG", "Yow!"));
headers.add(new Header("DATE", rfc1123Date(now)));
headers.add(new Header("expires", rfc1123Date(now + ONE_HOUR_MILLIS)));
headers.add(new Header("cache-control", "public, max-age=86400"));
headers.add(new Header("content-type", "text/plain"));
NetworkResponse response = new NetworkResponse(0, null, false, 0, headers);
Cache.Entry entry = HttpHeaderParser.parseCacheHeaders(response);
assertNotNull(entry);
assertEquals("Yow!", entry.etag);
assertEqualsWithin(now + ONE_DAY_MILLIS, entry.ttl, ONE_MINUTE_MILLIS);
assertEquals(entry.softTtl, entry.ttl);
assertEquals(
"ISO-8859-1", HttpHeaderParser.parseCharset(HttpHeaderParser.toHeaderMap(headers)));
}
}
