com.android.volley.NetworkResponse Java Examples

@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
    if (mType == null && mJavaClass == null) return Response.error(new ParseError());
    try {
        String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
        T parsedGSON = null;
        if (mType != null) {
            parsedGSON = mGson.fromJson(jsonString, mType);
        } else {
            parsedGSON = mGson.fromJson(jsonString, mJavaClass);
        }
        return Response.success(parsedGSON,
                HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    } catch (JsonSyntaxException je) {
        return Response.error(new ParseError(je));
    }
}
 

@Test public void parseCaseInsensitive() {

        long now = System.currentTimeMillis();

        Header[] headersArray = new Header[5];
        headersArray[0] = new BasicHeader("eTAG", "Yow!");
        headersArray[1] = new BasicHeader("DATE", rfc1123Date(now));
        headersArray[2] = new BasicHeader("expires", rfc1123Date(now + ONE_HOUR_MILLIS));
        headersArray[3] = new BasicHeader("cache-control", "public, max-age=86400");
        headersArray[4] = new BasicHeader("content-type", "text/plain");

        Map<String, String> headers = BasicNetwork.convertHeaders(headersArray);
        NetworkResponse response = new NetworkResponse(0, null, headers, false);
        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(headers));
    }
 

@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)));
}
 

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
    String parsed;
    try {
        /*
         * 1. HttpHeaderParser 解析编码集
         * 2. 将请求结果 Response 的数据 （ data ）通过编码集实例化一个数据 （ data ） String 类型
         */
        parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
    } catch (UnsupportedEncodingException e) {
        // 出现编码异常，就不进行编码处理，直接实例化一个 String
        parsed = new String(response.data);
    }
    /*
     * 解析成功，没有异常
     * 1. 将保存好 通过编码解析的 String 数据 返回
     * 2. 再通过 HttpHeaderParser 从网络请求回来的请求结果 NetworkResponse 的 Header 中提取出一个用于缓存的 Cache.Entry
     */
    return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
 

private void verifyResize(
        NetworkResponse networkResponse,
        int maxWidth,
        int maxHeight,
        ScaleType scaleType,
        int expectedWidth,
        int expectedHeight) {
    ImageRequest request =
            new ImageRequest("", null, maxWidth, maxHeight, scaleType, Config.RGB_565, null);
    Response<Bitmap> response = request.parseNetworkResponse(networkResponse);
    assertNotNull(response);
    assertTrue(response.isSuccess());
    Bitmap bitmap = response.result;
    assertNotNull(bitmap);
    assertEquals(expectedWidth, bitmap.getWidth());
    assertEquals(expectedHeight, bitmap.getHeight());
}
 

@Test public void publicMethods() throws Exception {
    // Catch-all test to find API-breaking changes.
    assertNotNull(Response.class.getMethod("success", Object.class, Cache.Entry.class));
    assertNotNull(Response.class.getMethod("error", VolleyError.class));
    assertNotNull(Response.class.getMethod("isSuccess"));

    assertNotNull(Response.Listener.class.getDeclaredMethod("onResponse", Object.class));

    assertNotNull(Response.ErrorListener.class.getDeclaredMethod("onErrorResponse",
            VolleyError.class));

    assertNotNull(NetworkResponse.class.getConstructor(int.class, byte[].class, Map.class,
            boolean.class, long.class));
    assertNotNull(NetworkResponse.class.getConstructor(int.class, byte[].class, Map.class,
            boolean.class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class, Map.class));
}
 

@Test
public void publicMethods() throws Exception {
    // Catch-all test to find API-breaking changes.
    assertNotNull(Response.class.getMethod("success", Object.class, Cache.Entry.class));
    assertNotNull(Response.class.getMethod("error", VolleyError.class));
    assertNotNull(Response.class.getMethod("isSuccess"));

    assertNotNull(Response.Listener.class.getDeclaredMethod("onResponse", Object.class));

    assertNotNull(
            Response.ErrorListener.class.getDeclaredMethod(
                    "onErrorResponse", VolleyError.class));

    assertNotNull(
            NetworkResponse.class.getConstructor(
                    int.class, byte[].class, Map.class, boolean.class, long.class));
    assertNotNull(
            NetworkResponse.class.getConstructor(
                    int.class, byte[].class, Map.class, boolean.class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class, Map.class));
}
 

@Override
public void fetchVolleyError(final ArtworkRequestModel model, final Context context, final VolleyError error) {
    if (BuildConfig.DEBUG) {
        Log.e(TAG, "VolleyError for request: " + model.getLoggingString());
    }

    if (error != null) {
        NetworkResponse networkResponse = error.networkResponse;
        if (networkResponse != null && networkResponse.statusCode == 503) {
            finishedLoading();
            return;
        }
    }

    ImageResponse imageResponse = new ImageResponse();
    imageResponse.model = model;
    imageResponse.image = null;
    imageResponse.url = null;
    new InsertImageTask(context, this).execute(imageResponse);
}
 

@Test
public void publicMethods() throws Exception {
    // Catch-all test to find API-breaking changes.
    assertNotNull(Response.class.getMethod("success", Object.class, Cache.Entry.class));
    assertNotNull(Response.class.getMethod("error", VolleyError.class));
    assertNotNull(Response.class.getMethod("isSuccess"));

    assertNotNull(Response.Listener.class.getDeclaredMethod("onResponse", Object.class));

    assertNotNull(Response.ErrorListener.class.getDeclaredMethod("onErrorResponse",
            VolleyError.class));

    assertNotNull(NetworkResponse.class.getConstructor(int.class, byte[].class, Map.class,
            boolean.class, long.class));
    assertNotNull(NetworkResponse.class.getConstructor(int.class, byte[].class, Map.class,
            boolean.class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class));
    assertNotNull(NetworkResponse.class.getConstructor(byte[].class, Map.class));
}
 

@Override
public NetworkResponse performRequest(Request<?> request) throws VolleyError {
    if (mNumExceptionsToThrow > 0 || mNumExceptionsToThrow == ALWAYS_THROW_EXCEPTIONS) {
        if (mNumExceptionsToThrow != ALWAYS_THROW_EXCEPTIONS) {
            mNumExceptionsToThrow--;
        }
        throw new ServerError();
    }

    requestHandled = request;
    return new NetworkResponse(mDataToReturn);
}
 

@Test public void specifiedCharsetJsonArray() throws Exception {
    byte[] data = jsonArrayString().getBytes(Charset.forName("ISO-8859-2"));
    Map<String, String> headers = new HashMap<String, String>();
    headers.put("Content-Type", "application/json; charset=iso-8859-2");
    NetworkResponse network = new NetworkResponse(data, headers);
    JsonArrayRequest arrayRequest = new JsonArrayRequest("", null, null);
    Response<JSONArray> arrayResponse = arrayRequest.parseNetworkResponse(network);

    assertNotNull(arrayResponse);
    assertTrue(arrayResponse.isSuccess());
    assertEquals(TEXT_VALUE, arrayResponse.result.getString(TEXT_INDEX));
    // don't check the copyright symbol, ISO-8859-2 doesn't have it, but it has Czech characters
}
 

@Test public void specifiedCharsetJsonObject() throws Exception {
    byte[] data = jsonObjectString().getBytes(Charset.forName("ISO-8859-1"));
    Map<String, String> headers = new HashMap<String, String>();
    headers.put("Content-Type", "application/json; charset=iso-8859-1");
    NetworkResponse network = new NetworkResponse(data, headers);
    JsonObjectRequest objectRequest = new JsonObjectRequest("", null, null, null);
    Response<JSONObject> objectResponse = objectRequest.parseNetworkResponse(network);

    assertNotNull(objectResponse);
    assertTrue(objectResponse.isSuccess());
    //don't check the text in Czech, ISO-8859-1 doesn't support some Czech characters
    assertEquals(COPY_VALUE, objectResponse.result.getString(COPY_NAME));
}
 

@Test public void defaultCharsetJsonArray() throws Exception {
    // UTF-8 is default charset for JSON
    byte[] data = jsonArrayString().getBytes(Charset.forName("UTF-8"));
    NetworkResponse network = new NetworkResponse(data);
    JsonArrayRequest arrayRequest = new JsonArrayRequest("", null, null);
    Response<JSONArray> arrayResponse = arrayRequest.parseNetworkResponse(network);

    assertNotNull(arrayResponse);
    assertTrue(arrayResponse.isSuccess());
    assertEquals(TEXT_VALUE, arrayResponse.result.getString(TEXT_INDEX));
    assertEquals(COPY_VALUE, arrayResponse.result.getString(COPY_INDEX));
}
 

@Test public void defaultCharsetJsonObject() throws Exception {
    // UTF-8 is default charset for JSON
    byte[] data = jsonObjectString().getBytes(Charset.forName("UTF-8"));
    NetworkResponse network = new NetworkResponse(data);
    JsonObjectRequest objectRequest = new JsonObjectRequest("", null, null, null);
    Response<JSONObject> objectResponse = objectRequest.parseNetworkResponse(network);

    assertNotNull(objectResponse);
    assertTrue(objectResponse.isSuccess());
    assertEquals(TEXT_VALUE, objectResponse.result.getString(TEXT_NAME));
    assertEquals(COPY_VALUE, objectResponse.result.getString(COPY_NAME));
}
 

/***
     * 緩存的數據
     *
     * @param response
     * @param maxAge        缓存的有效时间，默认60秒
     * @param oldSoftExpire
     * @return
     */
    private Cache.Entry cache(NetworkResponse response, long maxAge, long oldSoftExpire) {
        long now = System.currentTimeMillis();
        if (maxAge == 0) maxAge = CACHE_MAXAGE;
//        （如果判断服务器是用的缓存的，还是从网络上获取的呢，当前时间与之前记录的时间对比？如果大于60秒则表示是新的么？可以有）
        long softExpire = now + maxAge * 1000;
        Log.e("", "wenjun request cache() oldSoftExpire - now = " + (oldSoftExpire - now) + ", oldSoftExpire = " + oldSoftExpire + ", softExpire = " + softExpire);
        if ((oldSoftExpire > now) && (oldSoftExpire < softExpire)) {
            //如果之前的时间一定大于现在的时间，并且之前的时间减去现在的时间如果在60秒内，则表示是同一个，不用再更新缓存了
            return null;
        }

        Map<String, String> headers = response.headers;

        long serverDate = 0;
        String serverEtag = null;
        String headerValue;

        headerValue = headers.get("Date");
        if (headerValue != null) {
            serverDate = HttpHeaderParser.parseDateAsEpoch(headerValue);
        }
        Cache.Entry entry = new Cache.Entry();
        entry.data = response.data;
        entry.etag = serverEtag;
        entry.softTtl = softExpire;
        entry.ttl = entry.softTtl;
        entry.serverDate = serverDate;
        entry.responseHeaders = headers;
        return entry;
    }
 

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
    String parsed;
    try {
        parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
    } catch (UnsupportedEncodingException e) {
        parsed = new String(response.data);
    }
    return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
 

@Override
protected Response<Bitmap> parseNetworkResponse(NetworkResponse response) {
    // Serialize all decode on a global lock to reduce concurrent heap usage.
    synchronized (sDecodeLock) {
        try {
            return doParse(response);
        } catch (OutOfMemoryError e) {
            VolleyLog.e("Caught OOM for %d byte image, url=%s", response.data.length, getUrl());
            return Response.error(new ParseError(e));
        }
    }
}
 

@Override
protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
    try {
        String jsonString = new String(response.data,
                HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
        return Response.success(new JSONArray(jsonString),
                HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    } catch (JSONException je) {
        return Response.error(new ParseError(je));
    }
}
 

@Override
protected Response<Bitmap> parseNetworkResponse(NetworkResponse response) {
    // Serialize all decode on a global lock to reduce concurrent heap usage.
    synchronized (sDecodeLock) {
        try {
            return doParse(response);
        } catch (OutOfMemoryError e) {
            VolleyLog.e("Caught OOM for %d byte image, url=%s", response.data.length, getUrl());
            return Response.error(new ParseError(e));
        }
    }
}
 

private String convertNetworkResponseData2String(NetworkResponse response, String encoding) throws IOException, ServerError {
    String content = new String();

    if (response == null) {
        return content;
    }

    byte[] datas;
    if (response instanceof StreamBasedNetworkResponse) {
        InputStream inputStream = ((StreamBasedNetworkResponse) response).inputStream;
        if (inputStream != null) {
            datas = StreamBasedNetwork.entityToBytes(inputStream, ((StreamBasedNetworkResponse) response).contentLength, RVNetwork.DEFAULT_POOL_SIZE);
        } else {
            datas = response.data;
        }
    } else {
        datas = response.data;
    }

    if (datas != null) {
        try {
            content = new String(datas, HttpHeaderParser.parseCharset(response.headers, encoding));
        } catch (Exception e) {
            content = new String(datas);
        }
    }

    return content;
}
 

@Override
protected Response<JsonObject> parseNetworkResponse(NetworkResponse response) {
    try {
        String json = new String(
                response.data, HttpHeaderParser.parseCharset(response.headers));

        return Response.success(
                gson.fromJson(json, JsonObject.class), HttpHeaderParser.parseCacheHeaders(response));

    } catch (UnsupportedEncodingException | JsonSyntaxException e) {
        HTLogger.e(TAG, "parseNetworkResponse: ", e);
        ParseError parseError = new ParseError(response);
        return Response.error(parseError);
    }
}
 

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
  String parsed;
  try {
    parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
  } catch (UnsupportedEncodingException e) {
    parsed = new String(response.data);
  }
  return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
 

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
  String parsed;
  try {
    parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
  } catch (UnsupportedEncodingException e) {
    parsed = new String(response.data);
  }
  return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
 

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
  String parsed;
  try {
    parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
  } catch (UnsupportedEncodingException e) {
    parsed = new String(response.data);
  }
  return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(@NonNull final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(@NonNull final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(@NonNull final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(@NonNull final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Used for debugging only to view verbose error information
 *
 * @param error the {@link VolleyError}
 */
private void verboseError(@NonNull final VolleyError error) {

    final NetworkResponse response = error.networkResponse;

    if (response != null && error instanceof ServerError) {

        try {
            final String result = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            MyLog.i(CLS_NAME, "result: " + result);
        } catch (final UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}