Android httpclient 文件上传数据损坏和超时问题 [英] Android httpclient file upload data corruption and timeout issues
问题描述
我在 android 中上传图片时遇到问题.
i'm having issues with uploading images in android.
我使用的是 apache httpmime 4.1 lib代码是这样的:
i'm using apache httpmime 4.1 lib the code is like this:
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("image", new FileBody(new File(AndorraApplication.getPhotosPath() + "/" + entity.getFileName()), "image/jpeg"));
resp = NetworkUtils.sendHttpRequestMultipart(EXPORT_PHOTOS_URI, reqEntity);
NetworkUtils 类:
NetworkUtils class:
public class NetworkUtils {
public static final int REGISTRATION_TIMEOUT = 3 * 1000;
public static final int WAIT_TIMEOUT = 5 * 1000;
public static HttpResponse sendHttpRequestMultipart(String uri, MultipartEntity entity) {
HttpClient mHttpClient = new DefaultHttpClient();
final HttpParams params = mHttpClient.getParams();
HttpConnectionParams.setConnectionTimeout(params, REGISTRATION_TIMEOUT);
HttpConnectionParams.setSoTimeout(params, WAIT_TIMEOUT);
ConnManagerParams.setTimeout(params, WAIT_TIMEOUT);
HttpPost post = new HttpPost(uri);
post.addHeader(entity.getContentType());
post.setEntity(entity);
HttpResponse resp = mHttpClient.execute(post);
}
}
有时一切正常，但有时(尤其是在连接速度较慢的情况下)上传的图像非常损坏.示例在这里:http://pixelbirthcloud.com/574_orig.jpg
sometimes everything works fine, but sometimes (especially on a slow connection) the image is uploaded very corrupted. the example is here: http://pixelbirthcloud.com/574_orig.jpg
它不会抛出任何异常.上传文件的长度与原始文件的长度相同..尝试将 mime 类型更改为 application/octet-stream 或完全删除它.尝试玩超时.结果还是一样.最终用户几乎一直在上传损坏的图像(尽管我只设法获得了 2 次 Bronem 图像).图像大小最初是 2.5 兆，但后来我将其减小到 500-700 kb.虽然没有解决问题.
it doesn't throw any exceptions. the lenght of the uploaded file is same as the original one.. tried to change mime type to application/octet-stream or remove it at all. tries playing with timeouts. still same result. end users upload corrupted images almost all the time (although i managed to get bronem images just 2 times only).. the image size was 2.5 megs at first, but then i reduced it to 500-700 kb. didn't fix the problem though.
还没有尝试更改 apache 的库.. 也许是问题所在.. 但据我阅读网络，没有人在 httpmime 库中遇到过这种情况.
haven't tried to change the apache's library.. maybe it is the problem.. but as far as i read the net, nobody was experiencing this with httpmime library.
它可以是什么?我现在完全迷失了:(
what can it be? i'm completely lost now :(
另一个问题是超时有时不起作用.
the other issue is that timeouts sometimes not working.
就像说到这一行:HttpResponse resp = mHttpClient.execute(post);我禁用了 3g 连接，它只等待 17-20 分钟而不是 3 或 5 秒......然后才抛出异常.尝试了不同的方法.像这样:
like when it comes to this line: HttpResponse resp = mHttpClient.execute(post); and i disable 3g connection it just waits for like 17-20 minutes instead of 3 or 5 seconds.. and only then throws exception. tried different methods. like this:
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
HttpProtocolParams.setUseExpectContinue(params, false);
HttpConnectionParams.setConnectionTimeout(params, 10000);
HttpConnectionParams.setSoTimeout(params, 10000);
ConnManagerParams.setMaxTotalConnections(params, 5);
ConnManagerParams.setTimeout(params, 30000);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http",PlainSocketFactory.getSocketFactory(), 80));
registry.register(new Scheme("https",PlainSocketFactory.getSocketFactory(), 80));
ThreadSafeClientConnManager manager = new ThreadSafeClientConnManager(params, registry);
HttpClient httpclient = new DefaultHttpClient(manager, params);
但还是不行:)
推荐答案
See My Code of Image Uploader，它对我很有用此类将文件上传到服务器并最终读取 XML 回复.根据您的要求过滤代码..它对我来说非常顺利
See My Code of Image Uploader and it worked great for me This class Uploads a file to the server plus in the end read the XML reply also. Filter the code as per your requirement.. It worked pretty smooth for me
package com.classifieds;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import android.util.Log;
public class Uploader
{
private String Tag = "UPLOADER";
private String urlString ;//= "YOUR_ONLINE_PHP";
HttpURLConnection conn;
String exsistingFileName ;
private void uploadImageData(String existingFileName , String urlString)
{
String lineEnd = "
";
String twoHyphens = "--";
String boundary = "*****";
try {
// ------------------ CLIENT REQUEST
Log.e(Tag, "Inside second Method");
FileInputStream fileInputStream = new FileInputStream(new File(
exsistingFileName));
// open a URL connection to the Servlet
URL url = new URL(urlString);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos
.writeBytes("Content-Disposition: post-data; name=uploadedfile;filename="
+ exsistingFileName + "" + lineEnd);
dos.writeBytes(lineEnd);
Log.v(Tag, "Headers are written");
// create a buffer of maximum size
int bytesAvailable = fileInputStream.available();
int maxBufferSize = 1000;
// int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bytesAvailable];
// read file and write it into form...
int bytesRead = fileInputStream.read(buffer, 0, bytesAvailable);
while (bytesRead > 0) {
dos.write(buffer, 0, bytesAvailable);
bytesAvailable = fileInputStream.available();
bytesAvailable = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bytesAvailable);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// close streams
Log.v(Tag, "File is written");
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
Log.e(Tag, "error: " + ex.getMessage(), ex);
}
catch (IOException ioe) {
Log.e(Tag, "error: " + ioe.getMessage(), ioe);
}
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = null;
try {
sp = spf.newSAXParser();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Get the XMLReader of the SAXParser we created.
XMLReader xr = null;
try {
xr = sp.getXMLReader();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Create a new ContentHandler and apply it to the XML-Reader
MyExampleHandler1 myExampleHandler = new MyExampleHandler1();
xr.setContentHandler(myExampleHandler);
// Parse the xml-data from our URL.
try {
xr.parse(new InputSource(conn.getInputStream()));
//xr.parse(new InputSource(new java.io.FileInputStream(new java.io.File("login.xml"))));
} catch (MalformedURLException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
}
// Parsing has finished.
}
public Uploader(String existingFileName, boolean isImageUploading , String urlString ) {
this.exsistingFileName = existingFileName;
this.urlString = urlString;
}
class MyExampleHandler1 extends DefaultHandler
{
// ===========================================================
// Methods
// ===========================================================
@Override
public void startDocument() throws SAXException {
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
@Override
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts) throws SAXException {
}
/** Gets be called on closing tags like:
* </tag> */
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
}
/** Gets be called on the following structure:
* <tag>characters</tag> */
@Override
public void characters(char ch[], int start, int length) {
}
}
}
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