Java PostData and MultiForm - http-post

Question

I am trying to post some data to a server but not getting results as expected.
I get 200 OK response but the returned html source has a string saying
"Error - 404 Page not found"
I think I'm doing something wrong with the set of data that I'm sending.
Maybe I'm missing something as I never worked with multiform data before.
Here is the multiform data that is sent over(I've used tamper data to check what is sent over
POSTDATA =-----------------------------124853047628807
Content-Disposition: form-data; name="mgnlModelExecutionUUID"
4ee01e05-dc16-4535-a222-693b98ec9b69
-----------------------------124853047628807
Content-Disposition: form-data; name="field"
-----------------------------124853047628807
Content-Disposition: form-data; name="name"
test
-----------------------------124853047628807
Content-Disposition: form-data; name="surname"
test
-----------------------------124853047628807
Content-Disposition: form-data; name="age"
test
-----------------------------124853047628807--
In order to send this data, what I did is create a MultipartEntityBuilder like below:
StringBody name = new StringBody("test", ContentType.MULTIPART_FORM_DATA);
StringBody surname = new StringBody("test", ContentType.MULTIPART_FORM_DATA);
StringBody age = new StringBody("test", ContentType.MULTIPART_FORM_DATA);
StringBody field = new StringBody("", ContentType.MULTIPART_FORM_DATA);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
builder.addPart("name", name);
builder.addPart("surname", surname);
builder.addPart("age", age);
builder.addPart("field",field);
return builder;
On top of that the headers that I'm sending are as follow:
post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0");
post.addHeader("Accept", "text/html,application/xhtml xml,application/xml;q=0.9,*/*;q=0.8");
I tried to set the multiform header but it doesn't work
post.addHeader("Content-type", "multipart/form-data");
Any advice on what I might be missing?
THank you

Answer 1

I know i had problems using my code that i have written in order to post some text and also some binary files and ended up writing it for myself the whole application/multipartform .
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundry);
conn.setRequestProperty("Authorization", "----------------------------");
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"user_id\""+lineend+lineend);
out.writeBytes("1"+lineend);
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"preview_id\""+lineend+lineend);
out.writeBytes("1"+lineend);
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"categories_id\""+lineend+lineend);
out.writeBytes("2"+lineend);
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"title\""+lineend+lineend);
out.writeBytes("Mama"+lineend);
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"tags\""+lineend+lineend);
out.writeBytes("mama"+lineend);
out.flush();
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"video\"; filename=\""+file.getName()+"\""+lineend);
out.writeBytes(lineend);
Log.d("UPLOAD", "Titlul video-ului ="+file.getName());
//decoding of bytes from video
FileInputStream file_stream = new FileInputStream(file);
bytesAvailable =file_stream.available();
bufferSize = Math.min(bytesAvailable,maxBufferSize);
buffer = new byte[bufferSize];
Log.d("UPLOAD", "Bytes Read Video =" +bytesRead);
bytesRead = file_stream.read(buffer);
//writting to outputstream
while (bytesRead >0){
out.write(buffer, 0, bytesRead);
bytesRead=file_stream.read(buffer);
}
Log.d("UPLOAD", "Done Loading first buffer");
file_stream.close();
out.writeBytes(twoHiphens+boundry+lineend);
out.writeBytes("Content-Disposition: form-data; name=\"thumb\"; filename=\""+image.getName()+"\""+lineend);
out.writeBytes(lineend);
Log.d("UPLOAD", "Titlul preview-ului ="+image.getName());
//decodint image bytes
FileInputStream image_stream = new FileInputStream(image);
int bytesRead2;
int bytesAvailable2, bufferSize2 ;
bytesAvailable2 = image_stream.available();
bufferSize2 = Math.min(bytesAvailable2, maxBufferSize);
byte []buffer2 = new byte[bufferSize2];
//writing to outputstream
bytesRead2 = image_stream.read(buffer2);
while(bytesRead2>0){
out.write(buffer2, 0, bytesRead2); // bytesAvailable2 = image_stream.available();
bytesRead2 = image_stream.read(buffer2);
}
image_stream.close();
Log.d("UPLOAD", "Done loading the second buffer");
out.writeBytes(twoHiphens+boundry+twoHiphens+lineend);
out.writeBytes(lineend);
out.flush();
out.close();
Log.d("UPLOAD","Response Code = "+conn.getResponseCode());
String responseMessage = conn.getResponseMessage();
Log.d("UPLOAD", "Response Message = "+responseMessage);
InputStream in;
if(conn.getResponseCode() >= 400){
in = conn.getErrorStream();
}else{
in = conn.getInputStream();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
StringBuilder response = new StringBuilder();
char []bytes = new char[512];
int read ;
while((read = reader.read(bytes))!=-1){
response.append(bytes, 0, read);
}
Log.d("UPLOAD", "Response " +response);
conn.disconnect();
You can omit the code that referrers to binary data . Hope it would give you some help

Answer 2

Maybe the Content Type of each StringBody mustn't be ContentType.MULTIPART_FORM_DATA . Maybe it should be "text/plain "

Answer 3

Try this !
File file = new File(path);
File image = new File("/storage/emulated/0/DCIM/100MEDIA/a_thumbnail.jpg");
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(urls[0]);
HttpResponse response = null ;
post.setHeader("Authorization","----------------------------");
MultipartEntity ent = new MultipartEntity();
try {
ent.addPart("user_id",new StringBody("1"));
ent.addPart("categories_id",new StringBody("3"));
ent.addPart("tags",new StringBody("mama"));
ent.addPart("title",new StringBody("mama"));
ent.addPart("preview_id",new StringBody("2"));
ent.addPart("thumb", new FileBody(image));
ent.addPart("video", new FileBody(file));
post.setEntity(ent);
response = client.execute(post);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
answer= answer+bufferedReader.readLine();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return answer;
}