Android Multipart HTTP Post 不发送文件的 MIME 类型

Question

试图弄清楚我的编码有什么问题。我关注了来自 here 的博客文章.

我设法获得了将文件实际上传到 PHP 网络服务的代码。然而，出于某种原因，虽然我已经为文件明确设置了 MIME 类型，但 PHP 显示 MIME 只是一个空字符串，因此被拒绝。

这是我的代码:

public String SendPost(String fn, String bid, String caption, String uid, String APIKey, String postHash) 
        throws ParseException, ClientProtocolException, IOException {
    HttpClient httpclient = new DefaultHttpClient();
    httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);

    HttpPost httppost = new HttpPost(UrbURL);

    Log.i("POSTFN", fn);
    Log.i("POSTFN", bid);
    Log.i("POSTFN", caption);
    Log.i("POSTFN", uid);
    Log.i("POSTFN", APIKey);
    Log.i("POSTFN", postHash);

    String postAuth = uid + postHash;
    postAuth = md5(postAuth);
    postAuth = postAuth.substring(0, 16);
    //Log.i("POSTAUTH", postAuth);

    MultipartEntity mp = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

    /*File tempImg = new File(fn);
    FileBody bin = new FileBody(tempImg, "image/jpg");*/
    mp.addPart("business_photo", new FileBody(new File(fn), "image/jpg"));

    //StringBody s = new StringBody(bid, "text/plain", Charset.forName( "UTF-8" ));
    mp.addPart("business_id", new StringBody(bid, "text/plain", Charset.forName( "UTF-8" )));

    //s = new StringBody(caption, "text/plain", Charset.forName( "UTF-8" ));
    mp.addPart("photo_caption", new StringBody(caption, "text/plain", Charset.forName( "UTF-8" )));

    //s = new StringBody(uid, "text/plain", Charset.forName( "UTF-8" ));
    mp.addPart("user_id", new StringBody(uid, "text/plain", Charset.forName( "UTF-8" )));

    //s = new StringBody(APIKey, "text/plain", Charset.forName( "UTF-8" ));
    mp.addPart("apikey", new StringBody(APIKey, "text/plain", Charset.forName( "UTF-8" )));

    //s = new StringBody(postAuth, "text/plain", Charset.forName( "UTF-8" ));
    mp.addPart("auth", new StringBody(postAuth, "text/plain", Charset.forName( "UTF-8" )));

    httppost.setEntity(mp);

    String response = EntityUtils.toString( httpclient.execute( httppost ).getEntity(), "UTF-8" );

    httpclient.getConnectionManager().shutdown();

    return response;
}

非常感谢:)

Answer 1

我遇到了同样的问题，刚刚解决了它。

我发现使用 HttpMultipartMode.BROWSER_COMPATIBLE 阻止在我的请求中设置正确的 mimeType，当对图像使用 ByteArrayBody 时。我认为这可能与您遇到的问题相同。

当我改变这一行时:

MultipartEntity mp = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

到

MultipartEntity mp = new MultipartEntity();

然后 mime 类型设置正确，服务上传成功。

我看到人们使用 BROWSER_COMPATIBLE 来解决另一个问题，但希望您不需要它。