android使用appache httpclient混淆后错误排除总结
引用出处：http://blog.csdn.net/chenrunhua/article/details/50054225
android上使用appache httpclient上传文件时报一下错误：
[html]view plaincopy
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: org.apache.http.client.ClientProtocolException
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:756)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:519)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:497)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cloudapm.agent.android.instrumentation.HttpInstrumentation.execute(SourceFile:188)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.ecloud.netapi.a.m.a(SourceFile:130)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.ecloud.f.j.dY(SourceFile:160)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.e.dX(SourceFile:52)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.d.run(SourceFile:459)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.b.dS(SourceFile:316)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.b.a(SourceFile:14)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.c.run(SourceFile:62)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at java.lang.Thread.run(Thread.java:864)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: Caused by: org.apache.http.client.NonRepeatableRequestException: Cannot retry request with a non-repeatable request entity
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:427)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:519)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:497)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cloudapm.agent.android.instrumentation.HttpInstrumentation.execute(SourceFile:188)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.ecloud.netapi.a.m.a(SourceFile:130)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.ecloud.f.j.dY(SourceFile:160)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.e.dX(SourceFile:52)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.d.run(SourceFile:459)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.b.dS(SourceFile:316)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.b.a(SourceFile:14)?
11-20 12:49:59.572 7360-22466/com.cn21.ecloud D/d: at com.cn21.android.b.c.run(SourceFile:62)?
代码如下
[html]view plaincopy
RandomAccessFilefile=newRandomAccessFile(localFile, "r");
// 仅上传未完成的文件内容
file.seek(status._size);
InternalFileStreamfs=newInternalFileStream(new FileInputStream(
file.getFD()), status._size, observer);
InputStreamEntityentity=newInputStreamEntity(fs, fileLength
- status._size);
request.setEntity(entity);
DLog.d(TAG,"entity is repeatable ? = " + entity.isRepeatable());
DLog.write2File(TAG, "entity is repeatable ? = " + entity.isRepeatable(), DLog.LOG_PATH_TRANSFER);
if(ConstantConfig.DEBUG){
dumpRequest(request, null);
}
try {
HttpResponseresponse=mHttpClient.execute(request);
InternalFileStream是继承FilterInputStream类，实现进度得回调；
问题的表现：在混淆中，上传文件时就会报这个问题；不混淆则一直没有没有问题；
解决：
1.一开始被这个问题领向错误的方向；因为是混淆出问题，不混淆则一直没问题，所以在查混淆是否导致问题这个方向上：到最后添加了所有的类都不混淆的也不能解决问题
-keep class **{*;}
2.查看错误的log：貌似是NonRepeatableRequestException是不可重读的问题，
用filebody不好替换；
3.用HttpURLConnection替换http client，最后报错如下：
[html]view plaincopy
11-25 18:17:41.783 26180-26378/com.cn21.ecloud D/e: Release UploadService:com.cn21.ecloud.netapi.a.m@24817145
11-25 18:17:41.783 26180-26378/com.cn21.ecloud D/d: Transfer Ex
java.io.IOException: File descriptor closed
at libcore.io.Posix.readBytes(Native Method)
at libcore.io.Posix.read(Posix.java:147)
at libcore.io.BlockGuardOs.read(BlockGuardOs.java:230)
at libcore.io.IoBridge.read(IoBridge.java:472)
at java.io.FileInputStream.read(FileInputStream.java:177)
at java.io.DataInputStream.read(DataInputStream.java:63)
at java.io.InputStream.read(InputStream.java:162)
at java.io.DataInputStream.read(DataInputStream.java:59)
at com.cn21.ecloud.netapi.a.m.a(SourceFile:145)
at com.cn21.ecloud.f.j.dY(SourceFile:160)
at com.cn21.android.b.e.dX(SourceFile:52)
at com.cn21.android.b.d.run(SourceFile:459)
at com.cn21.android.b.b.dS(SourceFile:316)
at com.cn21.android.b.b.a(SourceFile:14)
at com.cn21.android.b.c.run(SourceFile:62)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
11-25 18:17:41.783 26180-26378/com.cn21.ecloud D/transferLoop: Transfer task:20151124_111841.mp4 stopped
报文件无效问题；
检查文件的读方面发现有个getFD()，获取文件的通道；进入FileInputStream这个类构造方法去发现这个stream流需要手动关闭：
[html]view plaincopy
/**
* Constructs a new {@code FileInputStream} that reads from {@code fd}.
*
* @param fd
* the FileDescriptor from which this stream reads.
* @throws NullPointerException
* if {@code fd} is {@code null}.
*/
public FileInputStream(FileDescriptor fd) {
if (fd== null) {
throw new NullPointerException("fd== null");
}
this.fd=fd;
this.shouldClose=false;
// Note that we do not call guard.open here because the
// FileDescriptor is not owned by the stream.
}
this.shouldClose = false;这个问题有点大，因此需要最后文件上传完再finally中关闭之前用RandomAccessFile打开的文件的句柄。
但是这个问题有点怪异，为什么不混淆时就不会出问题？而在混淆过后才能爆出这个问题？
总结：
最终问题的表面现在也许不是问题发生的根本原因；因为最后表现出来的问题可能是上一个问题引发的；因此需要往前面走点查查。