Android-Java HTTPCLIENT 通过 Content-Disposition 图片上传发送 http 参数

Question

我在 java 中有一个使用 HttpClient 的图像上传器功能，我正在使用 Content-Disposition。 但是我被困在那里我没有意识到如何在这个帖子请求中插入另一个身体形式参数。 例如我想添加一个参数，如：

description = "my image's description"

我的代码：

File file = new File(filepath);
        FileInputStream fileInputStream = new FileInputStream(file);
        URL url = new URL(UPLOAD_SERVER);
        connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setUseCaches(false);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("User-Agent", "Android Multipart HTTP Client 1.0");
        connection.setRequestProperty("Content-Type", "multipart/form-data; boundary="+boundary);
        outputStream = new DataOutputStream(connection.getOutputStream());
        outputStream.writeBytes("--" + boundary + "\r\n");
        outputStream.writeBytes("Content-Disposition: form-data; name=\"" + "img_upload" + "\"; filename=\"" + q[idx] +"\"" + "\r\n");
        outputStream.writeBytes("Content-Type: image/jpeg" + "\r\n");
        outputStream.writeBytes("Content-Transfer-Encoding: binary" + "\r\n");
        outputStream.writeBytes("\r\n");
        bytesAvailable = fileInputStream.available();
        bufferSize = Math.min(bytesAvailable, 1048576);
        buffer = new byte[bufferSize];
        bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        while(bytesRead > 0) {
            outputStream.write(buffer, 0, bufferSize);
            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, 1048576);
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }
        outputStream.writeBytes("\r\n");
        outputStream.writeBytes("--" + boundary + "--" + "\r\n");
        inputStream = connection.getInputStream();
        int status = connection.getResponseCode();
        if (status == HttpURLConnection.HTTP_OK) {
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            inputStream.close();
            connection.disconnect();
            fileInputStream.close();
            outputStream.flush();
            outputStream.close();
            return response.toString();
        } else {
            throw new Exception("Non ok response returned");
        }

Answer 1

我会尝试这样做：

outputStream.writeBytes("--" + boundary + "\r\n");
outputStream.writeBytes("Content-Disposition: form-data; name=\"" + "img_upload" + "\"; filename=\"" + q[idx] +"\"" + "\r\n");
outputStream.writeBytes("Content-Type: image/jpeg" + "\r\n");
outputStream.writeBytes("Content-Transfer-Encoding: binary" + "\r\n");
outputStream.writeBytes("--" + boundary + "\r\n");
outputStream.writeBytes("Content-Disposition: form-data; name=\"" + "description" + "\"" + "\r\n");
outputStream.writeBytes("\r\n");
outputStream.writeBytes(description);
outputStream.writeBytes("--" + boundary + "\r\n");