JavaAndroid:Volley HTTP补丁请求
我刚开始从我现有的网络库移植到Android的Volley。到目前为止,我已经成功地实现了适用的截击ImageLoader。现在,我正在尝试启动并运行我的第一个http调用,但发现了这个错误
注意:我故意从一个补丁请求开始,因为我会经常使用它们。此外,我的Volley版本也支持补丁: https://安卓.googlesource.com/platform/frameworks/volley/+/master/src/com/安卓/volley/Request.java https://安卓.googlesource.com/platform/frameworks/volley/+/master/src/com/安卓/volley/toolbox/HurlStack.java
堆栈跟踪:
E/InputDialogFragment(27940): VolleyError: java.net.ProtocolException: Connection already established
D/Volley (27940): [1] MarkerLog.finish: (67 ms) [ ] https://mobile.example.com/m/api/v1/user/ 0xb33a3c8d NORMAL 2
D/Volley (27940): [1] MarkerLog.finish: (+0 ) [ 1] add-to-queue
D/Volley (27940): [1] MarkerLog.finish: (+0 ) [544] cache-queue-take
D/Volley (27940): [1] MarkerLog.finish: (+0 ) [544] cache-miss
D/Volley (27940): [1] MarkerLog.finish: (+0 ) [545] network-queue-take
D/Volley (27940): [1] MarkerLog.finish: (+14 ) [545] post-error
D/Volley (27940): [1] MarkerLog.finish: (+53 ) [ 1] done
补丁请求
HashMap<String, Object> values = new HashMap<String, Object>();
values.put(mParam, val);
JsonObjectRequest request = new JsonObjectRequest(Request.Method.PATCH, APIConstants.URL_USER, new JSONObject(values),
new Response.Listener<JSONObject>(){
@Override
public void onResponse(JSONObject response){
// Blah do stuff here
mProgressDialog.dismiss();
}
},
new Response.ErrorListener(){
@Override
public void onErrorResponse(VolleyError error){
Log.e(TAG, "VolleyError: " + error.getMessage());
}
}){
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
VolleySingleton.getInstance().addCookie(headers);
return headers;
}
};
VolleySingleton.getInstance().getRequestQueue().add(request);
是的,我计划最终为StringRequest、JsonObjectRequest等构建类。。。但目前我只想启动一个
此外,如果你想了解addCookie,现在我更喜欢将我的cookie保存在preferences中,因为我对CookieManager不太熟悉
单打
public class VolleySingleton {
private static final String COOKIE_KEY = "Cookie";
private static VolleySingleton mInstance = null;
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
private SharedPreferences mPreferences;
private VolleySingleton(){
mRequestQueue = Volley.newRequestQueue(MyApplication.getAppContext());
mImageLoader = new ImageLoader(this.mRequestQueue, new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap> mCache = new LruCache<String, Bitmap>(10);
public void putBitmap(String url, Bitmap bitmap) {
mCache.put(url, bitmap);
}
public Bitmap getBitmap(String url) {
return mCache.get(url);
}
});
mPreferences = MyApplication.getAppContext().getSharedPreferences(PrefConstants.PREFERENCES, 0);
}
public static VolleySingleton getInstance(){
if(mInstance == null){
mInstance = new VolleySingleton();
}
return mInstance;
}
public RequestQueue getRequestQueue(){
return this.mRequestQueue;
}
public ImageLoader getImageLoader(){
return this.mImageLoader;
}
public final void addCookie(Map<String, String> headers) {
String cookie = mPreferences.getString(PrefConstants.PREF_COOKIE, null);
if(cookie != null){
headers.put(COOKIE_KEY, cookie);
}
}
}
# 1 楼答案
我也有这个问题,我的解决方案是放弃底层内置的Apache HTTP组件,使用Square中的OkHttp库,使用this ^{} implementation 进行截击,使用OkHttp作为其传输。效果很好
# 2 楼答案
我知道这个问题由来已久,但提供解决方案可以帮助尚未遇到同样挑战的人
# 3 楼答案
问题:
Volleys HurlStack(HttpUrlConnection)确实有补丁的支持代码。然而,每当您试图发出补丁请求时,它似乎仍会抛出“我的标题”和“堆栈跟踪”中发布的异常
黑客解决方案:
1)强制截击使用HttpClientStack
下面是我的截击单例构造函数的更新版本。这“有效”,但显然浪费了Hurl实现,如果(Build.VERSION.SDK_INT>;=9),则认为Hurl实现更好。更不用说谷歌计划在未来完全放弃apache HttpClient
2)继续使用上述截击动作,仅限于打补丁;将其重命名为VolleySingletonPatch(),然后为所有其他非补丁调用创建默认的VolleySingleton()。(优于1,但仍不是最优)
3)解决HurlStack中抛出的异常,尽管Volley已经实现了补丁。这将是最好的,但我宁愿避免直接修补凌空或不必要地扩展自己的httpstack
我没有回答这个问题,因为我非常感谢任何见解,当然还有比我在这里提出的更好的选择