安卓：org.apache.http.NoHtt presponseException：目标服务器无法响应 [英] Android: org.apache.http.NoHttpResponseException: The target server failed to respond
本文介绍了安卓：org.apache.http.NoHtt presponseException：目标服务器无法响应的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的Android应用程序使用的的HttpClient / HTTPGET访问REST API。我还设置：
httpGet.addHeader（授权，基本+ BASICAUTH）;
...它发送的Base64 EN codeD用户名：密码到服务器。测试时，我只使用HTTP和HTTPS无法连接到服务器。
每当我呼吁HttpClient的执行，我收到以下异常：
10月七号至28号：51：39.610：I /＃PA＃（12112）：org.apache.http.NoHtt presponseException：目标服务器无法响应
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.conn.DefaultResponseParser.parseHead（DefaultResponseParser.java:85）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.io.AbstractMessageParser.parse（AbstractMessageParser.java:174）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.protocol.Htt prequestExecutor.doReceiveResponse（Htt的prequestExecutor.java：279）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.protocol.Htt prequestExecutor.execute（Htt的prequestExecutor.java：121）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.client.DefaultRequestDirector.execute（DefaultRequestDirector.java:428）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:555）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:487）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:465）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.thomasamsler.android.app.tasks.HttpGetTask.doInBackground（HttpGetTask.java:87）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在org.foo.android.app.tasks.HttpGetTask.doInBackground（HttpGetTask.java:1）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在android.os.AsyncTask $ 2.call（AsyncTask.java:264）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在java.util.concurrent.FutureTask中$ Sync.innerRun（FutureTask.java:305）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在java.util.concurrent.FutureTask.run（FutureTask.java:137）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在android.os.AsyncTask $ SerialExecutor $ 1.运行（AsyncTask.java:208）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1076）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:569）
一十月7号至28号：51：39.610：I /＃PA＃（12112）：在java.lang.Thread.run（Thread.java:856）
请注意：
其实，我有不同的托管服务提供商三个发展服务器。当连接到他们两个，我得到上述错误。当连接到第三个服务器，一切正常。此外，其他GET和POST请求的工作就好了所有三个开发服务器。
所以，我想知道是否有具体的关于HTTP GET设置基本认证头时。
的东西我也可以拨打电话使用卷曲有问题的REST API没有任何问题。
code：
进口java.io.ByteArrayOutputStream中;
进口java.io.IOException异常;
进口org.apache.http.HttpEntity;
进口org.apache.http.Htt presponse;
进口org.apache.http.client.ClientProtocolException;
进口org.apache.http.client.HttpClient;
进口org.apache.http.client.methods.HttpGet;
进口org.apache.http.impl.client.DefaultHttpClient;
进口android.os.AsyncTask;
进口android.util.Log;
公共类HttpGetTask扩展的AsyncTask＆LT; HttpGetRequestArgs，太虚，字符串＆GT;实现AppConstants {
私人HttpTaskNotifier mNotifier;
私人的Htt presponse mHtt presponse;
私人诠释mHttpStatus $ C $库克群岛;
私人诠释mHttpStatus code;
私人诠释mError code = AppConstants.NO_ERROR;
公共HttpGetTask（INT则httpStatus $ C $库克群岛，HttpTaskNotifier通知）{
mNotifier =通知;
mHttpStatus $ C $库克群岛=则httpStatus $ C $库克群岛;
}
@覆盖
保护字符串doInBackground（HttpGetRequestArgs参数... args）{
HttpGetRequestArgs httpGetRequestArgs =的args [0];
HttpClient的HttpClient的=新DefaultHttpClient（）;
HTTPGET HTTPGET = NULL;
尝试 {
HTTPGET =新HTTPGET（httpGetRequestArgs.getUrl（））;
串apiKey = httpGetRequestArgs.getApiKey（）;
如果（空= apiKey和放大器;！＆安培;！等于（apiKey））{
httpGet.addHeader（授权，ApiKey+ apiKey）;
}
字符串BASICAUTH = httpGetRequestArgs.getBasicAuth（）;
如果（空= BASICAUTH和放大器;！＆安培;！等于（BASICAUTH））{
httpGet.addHeader（授权，基本+ BASICAUTH）;
}
}
赶上（抛出：IllegalArgumentException E）{
Log.e（LOG_TAG，异常，E）;
返回null;
}
尝试 {
mHtt presponse = httpClient.execute（HTTPGET）;
}
赶上（ClientProtocolException E）{
mError code = AppConstants.REST_ERROR;
返回null;
}
赶上（IOException异常E）{
mError code = AppConstants.REST_ERROR;
返回null;
}
赶上（抛出：IllegalArgumentException IAE）{
mError code = AppConstants.REST_ERROR;
返回null;
}
如果（空== mHtt presponse）{
mError code = AppConstants.REST_ERROR;
返回null;
}
。mHttpStatus code = mHtt presponse.getStatusLine（）的getStatus code（）;
如果（mHttpStatus $ C $库克群岛！= mHttpStatus code）{
mError code = AppConstants.REST_ERROR;
返回null;
}
ByteArrayOutputStream OUT =新ByteArrayOutputStream（）;
HttpEntity httpEntity = mHtt presponse.getEntity（）;
如果（空== httpEntity）{
mError code = AppConstants.REST_ERROR;
返回null;
}
尝试 {
httpEntity.writeTo（出）;
out.close（）;
}
赶上（IOException异常IOE）{
mError code = AppConstants.REST_ERROR;
返回null;
}
返回out.toString（）;
}
@覆盖
保护无效onPostExecute（字符串内容）{
如果（AppConstants.NO_ERROR！= mError code）{
mNotifier.onError（mError code）;
}
mNotifier.doProcess（内容）;
}
@覆盖
保护无效onCancelled（）{
mNotifier.doCancel（）;
}
}
解决方案
我终于想通了，问题是什么。当我这样做的用户名和密码的Base64编码，我使用了错误的标志Base64.en codeToString（...）。所以我改变falg：
FROM：
BASICAUTH = Base64.en codeToString（basicAuth.getBytes（），Base64.DEFAULT）;
要：
BASICAUTH = Base64.en codeToString（basicAuth.getBytes（），Base64.NO_WRAP）;
......，一切都工作得很好。
My Android app uses an HttpClient/HttpGet to access a REST API. I also set:
httpGet.addHeader("Authorization", "Basic " + basicAuth);
... which sends the Base64 encoded "username:password" to the server. For testing, I just use HTTP and not HTTPS to connect to the server.
Whenever I call "execute" on the HttpClient, I receive the following exception:
07-28 10:51:39.610: I/# PA #(12112): org.apache.http.NoHttpResponseException: The target server failed to respond
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:85)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
07-28 10:51:39.610: I/# PA #(12112): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
07-28 10:51:39.610: I/# PA #(12112): at org.thomasamsler.android.app.tasks.HttpGetTask.doInBackground(HttpGetTask.java:87)
07-28 10:51:39.610: I/# PA #(12112): at org.foo.android.app.tasks.HttpGetTask.doInBackground(HttpGetTask.java:1)
07-28 10:51:39.610: I/# PA #(12112): at android.os.AsyncTask$2.call(AsyncTask.java:264)
07-28 10:51:39.610: I/# PA #(12112): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-28 10:51:39.610: I/# PA #(12112): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-28 10:51:39.610: I/# PA #(12112): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
07-28 10:51:39.610: I/# PA #(12112): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
07-28 10:51:39.610: I/# PA #(12112): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
07-28 10:51:39.610: I/# PA #(12112): at java.lang.Thread.run(Thread.java:856)
NOTE:
I actually have three development servers with different hosting providers. When connecting to two of them, I get the above error. When connecting to the third server, everything works fine. Also, other GET and POST request work just fine on all three development servers.
So I am wondering if there is something specific about HTTP GET when setting the basic auth header.
I can also make a call using "curl" to the REST API in question without any issues.
Code:
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.os.AsyncTask;
import android.util.Log;
public class HttpGetTask extends AsyncTask<HttpGetRequestArgs, Void, String> implements AppConstants {
private HttpTaskNotifier mNotifier;
private HttpResponse mHttpResponse;
private int mHttpStatusCodeOk;
private int mHttpStatusCode;
private int mErrorCode = AppConstants.NO_ERROR;
public HttpGetTask(int httpStatusCodeOk, HttpTaskNotifier notifier) {
mNotifier = notifier;
mHttpStatusCodeOk = httpStatusCodeOk;
}
@Override
protected String doInBackground(HttpGetRequestArgs... args) {
HttpGetRequestArgs httpGetRequestArgs = args[0];
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = null;
try {
httpGet = new HttpGet(httpGetRequestArgs.getUrl());
String apiKey = httpGetRequestArgs.getApiKey();
if (null != apiKey && !"".equals(apiKey)) {
httpGet.addHeader("Authorization", "ApiKey " + apiKey);
}
String basicAuth = httpGetRequestArgs.getBasicAuth();
if (null != basicAuth && !"".equals(basicAuth)) {
httpGet.addHeader("Authorization", "Basic " + basicAuth);
}
}
catch (IllegalArgumentException e) {
Log.e(LOG_TAG, "EXCEPTION", e);
return null;
}
try {
mHttpResponse = httpClient.execute(httpGet);
}
catch (ClientProtocolException e) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
catch (IOException e) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
catch (IllegalArgumentException iae) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
if (null == mHttpResponse) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
mHttpStatusCode = mHttpResponse.getStatusLine().getStatusCode();
if (mHttpStatusCodeOk != mHttpStatusCode) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
HttpEntity httpEntity = mHttpResponse.getEntity();
if (null == httpEntity) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
try {
httpEntity.writeTo(out);
out.close();
}
catch (IOException ioe) {
mErrorCode = AppConstants.REST_ERROR;
return null;
}
return out.toString();
}
@Override
protected void onPostExecute(String content) {
if (AppConstants.NO_ERROR != mErrorCode) {
mNotifier.onError(mErrorCode);
}
mNotifier.doProcess(content);
}
@Override
protected void onCancelled() {
mNotifier.doCancel();
}
}
解决方案
I finally figured out what the problems is. When I do the Base64 encoding of the username and password, I use the wrong flag for Base64.encodeToString(...). So I change the falg:
FROM:
basicAuth = Base64.encodeToString(basicAuth.getBytes(), Base64.DEFAULT);
TO:
basicAuth = Base64.encodeToString(basicAuth.getBytes(), Base64.NO_WRAP);
... and everything is working just fine.
这篇关于安卓：org.apache.http.NoHtt presponseException：目标服务器无法响应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
