Android上如何使用multipart/form-data上传图片/图片

How use multipart/form-data upload picture/image on Android

提问by Joseph

This is my code.

这是我的代码。

I got Http 400 error, can someone help me?

我收到 Http 400 错误，有人可以帮助我吗？

HttpClient   httpClient;
HttpPost     httpPost;
HttpResponse response;
HttpContext  localContext;
FileEntity   tmp = null;   
String       ret = null;

httpClient = new DefaultHttpClient( );
httpClient.getParams().setParameter( ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109) ;

httpPost = new HttpPost(url);
tmp      = new FileEntity( data,"UTF-8" );

httpPost.setEntity( tmp );
httpPost.setHeader( "Content-Type", "multipart/form-data" );
httpPost.setHeader( "access_token", facebook.getAccessToken( ) );
httpPost.setHeader( "source",       data.getAbsolutePath( ) );
httpPost.setHeader( "message",      "Caption for the photo" );

localContext = new BasicHttpContext( );
response     = httpClient.execute( httpPost,localContext );

---

---

bobince, thanks this is my new id, I will try put OAuth to my connection header.

bobince，谢谢这是我的新 ID，我将尝试将 OAuth 放入我的连接标头。

And this is my old code, I will update it soon.

这是我的旧代码，我会尽快更新。

private void uploadPicture( ) throws ParseException, IOException {
    HttpClient httpclient = new DefaultHttpClient();
    httpclient.getParams( ).setParameter( CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1 );

    HttpPost httppost = new HttpPost( "https://graph.facebook.com/me/photos" );
    File file = new File( sdpicturePath );

    // DEBUG
    Log.d( "TSET", "FILE::" + file.exists( ) ); // IT IS NOT NULL
    Log.d( "TEST", "AT:" + fbAccessToken ); // I GOT SOME ACCESS TOKEN

    MultipartEntity mpEntity  = new MultipartEntity( );
    ContentBody cbFile        = new FileBody( file, "image/png" );
    ContentBody cbMessage     = new StringBody( "TEST TSET" );
    ContentBody cbAccessToken = new StringBody( fbAccessToken );

    mpEntity.addPart( "access_token", cbAccessToken );
    mpEntity.addPart( "source",       cbFile        );
    mpEntity.addPart( "message",      cbMessage     );        

    httppost.setEntity( mpEntity );

    // DEBUG
    System.out.println( "executing request " + httppost.getRequestLine( ) );
    HttpResponse response = httpclient.execute( httppost );
    HttpEntity resEntity = response.getEntity( );

    // DEBUG
    System.out.println( response.getStatusLine( ) );
    if (resEntity != null) {
      System.out.println( EntityUtils.toString( resEntity ) );
    } // end if

    if (resEntity != null) {
      resEntity.consumeContent( );
    } // end if

    httpclient.getConnectionManager( ).shutdown( );
} // end of uploadPicture( )

采纳答案by bobince

setEntitysets the source of the whole request body, so this would only work if the datafile was an already-encoded multipart/form-datablock.

setEntity设置整个请求正文的来源，因此这仅在data文件是已经编码的multipart/form-data块时才有效。

To create a multipart/form-data-encoded form submission for use as a POST request body, you'll need a MIME multipart encoder, typically org.apache.http.entity.mime.MultipartEntity. Unfortunately, this is not bundled by Android so if you want it you'll have to pull in a newer HttpClientfrom Apache.

要创建multipart/form-data用作 POST 请求正文的-encoded 表单提交，您需要一个 MIME 多部分编码器，通常是org.apache.http.entity.mime.MultipartEntity. 不幸的是，这不是由 Android 捆绑的，因此如果您想要它，则必须从 Apache 中获取更新的HttpClient。

See this questionfor example code and this threadfor background.

请参阅此问题的示例代码和此线程的背景。

回答by Krystian

There is my working solution for sending image with post, using apache http libraries:

我有一个使用 apache http 库通过 post 发送图像的工作解决方案：

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
            byte[] imageBytes = baos.toByteArray();

            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(StaticData.AMBAJE_SERVER_URL + StaticData.AMBAJE_ADD_AMBAJ_TO_GROUP);

            String boundary = "-------------" + System.currentTimeMillis();

            httpPost.setHeader("Content-type", "multipart/form-data; boundary="+boundary);

            ByteArrayBody bab = new ByteArrayBody(imageBytes, "pic.png");
            StringBody sbOwner = new StringBody(StaticData.loggedUserId, ContentType.TEXT_PLAIN);
            StringBody sbGroup = new StringBody("group", ContentType.TEXT_PLAIN);

            HttpEntity entity = MultipartEntityBuilder.create()
                    .setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
                    .setBoundary(boundary)
                    .addPart("group", sbGroup)
                    .addPart("owner", sbOwner)
                    .addPart("image", bab)
                    .build();

            httpPost.setEntity(entity);

            try {
                HttpResponse response = httpclient.execute(httpPost);
                ...then reading response

回答by Shaw

as for facebook graph api, this code works perfect. however, sometimes, you need to use nameinstead of filename, graph api seems to conflict with rfc document.

至于 facebook graph api，这段代码完美无缺。但是，有时，您需要使用name而不是filename，图形 api 似乎与 rfc 文档冲突。

final String BOUNDERY = "3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f";
final String CRLF = "\r\n";
StringBuilder sbBody_1 = new StringBuilder();
sbBody_1.append("--" + BOUNDERY + CRLF);
sbBody_1.append("Content-Disposition: form-data; filename=\"source\"" + CRLF);
sbBody_1.append(CRLF);
StringBuilder sbBody_2 = new StringBuilder();
sbBody_2.append(CRLF + "--" + BOUNDERY + "--");
URL url = new URL("https://graph.facebook.com/me/photos?access_token=" + accessToken);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDERY);
connection.setChunkedStreamingMode(0);
OutputStream out = new BufferedOutputStream(connection.getOutputStream());
out.write(sbBody_1.toString().getBytes());
out.write(bFile);// bFile is byte array of the bitmap
out.write(sbBody_2.toString().getBytes());
out.close();
BufferedReader bips = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String temp = null;
while ((temp = bips.readLine()) != null) {
    Log.d("fbnb", temp);
}
bips.close();
connection.disconnect();