httpClient，在分块模式下执行多部分 POST 时出现问题...

发布于 2024-12-01 18:05:11 字数 998 浏览 3 评论 0原文

好吧，我想知道如何才能以分块模式发布多部分。我有 3 个部分，文件可能很大，因此必须分块发送。

这是我所做的：

    MultipartEntity multipartEntity = new MultipartEntity() {
        @Override
        public boolean isChunked() {
            return true;
        }
    };

    multipartEntity.addPart("theText", new StringBody("some text", Charset.forName("UTF-8")));

    FileBody fileBody1 = new FileBody(file1);
    multipartEntity.addPart("theFile1", fileBody1);

    FileBody fileBody2 = new FileBody(file2);
    multipartEntity.addPart("theFile2", fileBody2);

    httppost.setEntity(multipartEntity);

    HttpParams params = new BasicHttpParams();
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpClient httpClient = new DefaultHttpClient(params);

    HttpResponse httpResponse = httpClient.execute(httppost);

在服务器端，我确实收到了 3 个部分，但文件没有被分块，它们被作为一个整体接收...基本上总共我看到仅出现 4 个边界：3 --xxx, 1 at结束--xxx--。我认为重写 isChunked 可以解决问题，但没有...;(

我想做的事情可行吗？我怎样才能做到这一点？

非常感谢。极品

原文

Well I am wondering how I can achieve to post a multipart in chunked mode. I have 3 parts, and the files which can be big so must be sent in chunks.

Here what I do :

    MultipartEntity multipartEntity = new MultipartEntity() {
        @Override
        public boolean isChunked() {
            return true;
        }
    };

    multipartEntity.addPart("theText", new StringBody("some text", Charset.forName("UTF-8")));

    FileBody fileBody1 = new FileBody(file1);
    multipartEntity.addPart("theFile1", fileBody1);

    FileBody fileBody2 = new FileBody(file2);
    multipartEntity.addPart("theFile2", fileBody2);

    httppost.setEntity(multipartEntity);

    HttpParams params = new BasicHttpParams();
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpClient httpClient = new DefaultHttpClient(params);

    HttpResponse httpResponse = httpClient.execute(httppost);

On the server side, I do receive the 3 parts but the files for example are not chunked, they are received as one piece... basically total I see 4 boundaries appearing only : 3 --xxx, 1 at the end --xxx-- .
I thought the override of isChunked would do the trick but no... ;(

Is what I am trying to do feasible ? How could I make that work ?

Thanks a lot.
Fab

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离笑几人歌 2024-12-08 18:05:12

要生成分块的多部分主体，其中一个部分的大小必须不可用。就像正在流式传输的部分一样。

例如，假设您的 file2 是一个非常大的视频。您可以用该代码替换代码的一部分

FileBody fileBody2 = new FileBody(file2);
multipartEntity.addPart("theFile2", fileBody2);

：

final InputStreamBody binVideo = new InputStreamBody(new FileInputStream(file2), "video/mp4", file2.getName());
multipartEntity.addPart("video", binVideo);

由于现在第三部分是 InputStream 而不是 File，因此您的多部分 HTTP 请求将具有标头 Transfer-Encoding: chunked。

To generate a multipart body chunked, one of the part must have it size unavailable. Like a part that is streaming.

For example let assume your file2 is a really big video. You could replace the part of your code:

FileBody fileBody2 = new FileBody(file2);
multipartEntity.addPart("theFile2", fileBody2);

wtih that code:

final InputStreamBody binVideo = new InputStreamBody(new FileInputStream(file2), "video/mp4", file2.getName());
multipartEntity.addPart("video", binVideo);

since now the third part is an InputStream instead of File, your multipart HTTP request will have the header Transfer-Encoding: chunked.

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