Uploading multipart/form-data on Android using OKHttp - okhttp

Question

I was trying to upload Multipart/form-data on Android using Okhttp, but it does not work.
The request header is
POST /api/texttospeech/v3.0-beta1//datasets/upload HTTP/1.1
Host: koreacentral.customvoice.api.speech.microsoft.com
Connection: keep-alive
Content-Length: 201455
Accept: application/json, text/plain, /
Correlation-Id: 290c5850-f621-11ea-ac4a-9dac0e19cc7b
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36 Edg/85.0.564.51
Ocp-Apim-Subscription-Key: 38fae10960fc477ba614c6dfe64613ba
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryZAaHsREIpzJ9sBHS
Origin: https://speech.microsoft.com
Sec-Fetch-Site: same-site
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Accept-Encoding: gzip, deflate, br
Accept-Language: ko,en;q=0.9,en-US;q=0.8
and the multipart/form-data is
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="projectId"
1a685f5d-400b-4801-8adb-9d359cad27cb
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="name"
16151
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="description"
51561
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="dataImportKind"
CustomVoice
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="locale"
en-US
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="properties"
{"Gender":"Male","IsMixLingual":"false","PortalAPIVersion":"3"}
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="audiodata"; filename="1.zip"
Content-Type: application/x-zip-compressed
------WebKitFormBoundaryZAaHsREIpzJ9sBHS
Content-Disposition: form-data; name="transcriptions"; filename="transcript.txt"
Content-Type: text/plain
------WebKitFormBoundaryZAaHsREIpzJ9sBHS--
The code I created is something like this.
String boundary = "----WebKitFormBoundary" + result; //result is the random digits
String Url = String.format("https://%s.customvoice.api.speech.microsoft.com/api/texttospeech/v3.0-beta1//datasets/upload", region);
String audioPath = getFilesDir().getAbsolutePath()+"/audios.zip";
String scriptPath = getFilesDir().getAbsolutePath()+"/script.txt";
System.out.println("properties to String"+ properties.toString());
File audioFile = new File(audioPath);
File scriptFile = new File(scriptPath);
//Create request body (params or json)
System.out.println("audiopath is " + audioPath);
System.out.println("scriptpath is "+ scriptPath);
MultipartBody formBody = new MultipartBody.Builder(boundary)
.setType(MultipartBody.FORM)
.addFormDataPart("projectId", projectId)
.addFormDataPart("name", defaultVal)
.addFormDataPart("description", defaultVal)
.addFormDataPart("dataImportKind", "CustomVoice")
.addFormDataPart("locale", "en-US")
.addFormDataPart("properties", properties.toString())
.addFormDataPart("audiodata", "audios.zip", RequestBody.create(MediaType.parse("application/x-zip-compressed"), audioFile))
.addFormDataPart("transcriptions", "script.txt", RequestBody.create(MediaType.parse("text/plain"), scriptFile))
.build();
System.out.println(formBody);
Request request = new Request.Builder()
.header("Ocp-Apim-Subscription-Key", subKey)
.addHeader("Ocp-Apim-Subscription-Key", subKey)
.addHeader("Content-Type", formBody.contentType().toString())
.post(formBody)
.url(Url)
.build();
System.out.println("Data upload request : "+ request);
System.out.println("Data upload request : "+ request.body());
System.out.println("Data upload request : "+ request.body().toString());
//Response response = client.newCall(request).execute();
//System.out.println("data upload response "+response.body().string());
//response.close();
Call call = client.newCall(request);
call.enqueue(new Callback() {
#Override
public void onFailure(#NotNull Call call, #NotNull IOException e) {
e.printStackTrace();
}
#Override
public void onResponse(#NotNull Call call, #NotNull Response response) throws IOException {
System.out.println("Response "+response);
}
});
return null;
}
The error is
Response{protocol=http/1.1, code=500, message=Internal Server Error, url=https://koreacentral.customvoice.api.speech.microsoft.com/api/texttospeech/v3.0-beta1//datasets/upload}
The Internal Server Error seems to be wrong, since it works if I send the request through Python, using
from requests_toolbelt.multipart.encoder import MultipartEncoder

Answer 1

Code 500 means the server receives your request but fail to complete it.As the server performs well while using python according to your description, I guess that you got something wrong in your HTTP-Header or multipart/form-data.But it cannot be find out yet by the only info.I suggest that you should compare the data you send through okhttp and python to find out the difference.