Android httpclient 文件上传数据损坏和超时问题

Question

我在 android 中上传图片时遇到问题。

我正在使用 apache httpmime 4.1 库代码是这样的:

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:

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

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 或将其完全删除。尝试玩超时。还是一样的结果。最终用户几乎总是上传损坏的图像(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。

还没有尝试更改 apache 的库..也许这是问题所在..但据我所知，没有人在使用 httpmime 库时遇到过这种情况。

它会是什么？我现在完全迷路了:(

另一个问题是超时有时不起作用。

就像谈到这一行时: HttpResponse resp = mHttpClient.execute(post);我禁用 3g 连接它只是等待 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:

        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:)

Answer 1

查看我的图片上传程序代码，它对我来说非常有用此类将文件上传到服务器，最后还读取 XML 回复。根据您的要求过滤代码。它对我来说非常流畅

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 = "\r\n";
        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) {

     }
    }

}