android - 发送带有多个参数的多部分/表单请求？

Question

我正在尝试将图片上传到服务器，但我从服务器收到不同的响应，具体取决于我发送的实体。

当我发送

FileBody fb = new FileBody(new File(filePath), "image/jpeg");
StringBody contentString = new StringBody(directoryID + "");

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
entity.addPart("file", fb);
entity.addPart("directory_id", contentString);
postRequest.setEntity(entity);

HttpResponse response = httpClient.execute(postRequest);
// Read the response
String jsonString = EntityUtils.toString(response.getEntity());

我得到的响应是 {"status":"Success","code":"200","message":"File has been uploaded Successfully"

如果我以这种方式发送相同的文件

Bitmap bitmapOrg = BitmapFactory.decodeFile(filePath);
ByteArrayOutputStream bao = new ByteArrayOutputStream();
bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 90, bao);
byte[] data = bao.toByteArray();

StringBody contentString = new StringBody(directoryID + "");
ByteArrayBody ba = new ByteArrayBody(data, "image/jpeg", "file");

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
entity.addPart("file", ba);
entity.addPart("directory_id", contentString);

postRequest.setEntity(entity);
HttpResponse response = httpClient.execute(postRequest);
// Read the response
String jsonString = EntityUtils.toString(response.getEntity());

我现在得到的响应是 {"status":"Failure","code":"501","message":"Invalid File to upload"}

• 所以我想知道为什么两个响应之间存在差异？
• 我发送 post 请求参数的方式是否正确？
• 我需要做什么才能以同样的方式发布视频？

下面是完整的代码供引用

public void uploadFile(int directoryID, String filePath) {
    Bitmap bitmapOrg = BitmapFactory.decodeFile(filePath);
    ByteArrayOutputStream bao = new ByteArrayOutputStream();

    String upload_url = BASE_URL + UPLOAD_FILE;
    bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 90, bao);

    byte[] data = bao.toByteArray();

    HttpClient httpClient = new DefaultHttpClient();
    HttpPost postRequest = new HttpPost(upload_url);
    MultipartEntity entity = new MultipartEntity(
            HttpMultipartMode.BROWSER_COMPATIBLE);

    try {
        // Set Data and Content-type header for the image
        FileBody fb = new FileBody(new File(filePath), "image/jpeg");
        ByteArrayBody ba = new ByteArrayBody(data, "image/jpeg", "file");
        StringBody contentString = new StringBody(directoryID + "");

        // If i do this 
        entity.addPart("file", fb);
        // I get a valid response

        // If i do this
        entity.addPart("file", ba);
        // I get an invalid response

        entity.addPart("directory_id", contentString);
        postRequest.setEntity(entity);

        HttpResponse response = httpClient.execute(postRequest);
        // Read the response
        String jsonString = EntityUtils.toString(response.getEntity());
        Log.e("response after uploading file ", jsonString);

    } catch (Exception e) {
        Log.e("Error in uploadFile", e.getMessage());
    }

}

Answer 1

我能够解决这个问题，所以我发布了这个答案，因为它可能会帮助其他面临同样问题的人。

问题是我上传图片文件的服务器只解析了扩展名为 JPEG、PNG、GIF 等的文件，而忽略了其余文件。

我以 ByteArrayBody 形式发送的图像文件的 filename 属性没有扩展名，因此导致了这个问题。

ByteArrayBody ba = new ByteArrayBody(data, "image/jpeg", "file");
entity.addPart("file", ba);

我把它换成了

ByteArrayBody ba = new ByteArrayBody(data, "image/jpeg", "file.jpeg");
entity.addPart("file", ba);

它奏效了。