REST Windows Phone Photo upload - rest

Question

I'm trying to upload a photo to a REST api in a Windows Phone 7 application using RestSharp for my Gets/Posts.
The post parameters are as follows:
photo:
The photo, encoded as multipart/form-data
photo_album_id:
Identifier of an existing photo album, which may be an event or group
album
I've created my request, but every time I get back "{\"details\":\"missing photo parameter\",\"problem\":\"The API request is malformed\"}\n
My photo parameter looks like this:
"---------------------------8cd9bfbafb3ca00\r\nContent-Disposition: form-data; name=\"filename\"; filename=\"somefile.jpg\"\r\nContent-Type: image/jpg\r\n\r\n(some binary junk listed here)\r\n-----------------------------8cd9bfbafb3ca00--"
I'm not quite sure if it's a problem with how I'm presenting the binary data for the image (currently in my PhotoTaskCompleted event, I read the contents of e.ChosenPhoto into a byte[] and pass that to a helper method to create the form data) or if I just don't create the form correctly.
I'm just trying to do this a simple as possible, then I can refactor once I know how it all works.
void ImageObtained(object sender, PhotoResult e)
{
var photo = ReadToEnd(e.ChosenPhoto);
var form = PostForm(photo);
var request = new RequestWrapper("photo", Method.POST);
request.AddParameter("photo_album_id", _album.album_id);
request.AddParameter("photo", form);
request.Client.ExecuteAsync<object>(request, (response) =>
{
var s = response.Data;
});
}
private string CreateBoundary()
{
return "---------------------------" + DateTime.Now.Ticks.ToString("x");
}
private string PostForm(byte[] data)
{
string boundary = CreateBoundary();
StringBuilder post = new StringBuilder();
post.Append(boundary);
post.Append("\r\n");
post.Append("Content-Disposition: form-data; name=\"filename\"; filename=\"somefile.jpg\"");
post.Append("\r\n");
post.Append("Content-Type: image/jpg");
post.Append("\r\n\r\n");
post.Append(ConvertBytesToString(data));
post.Append("\r\n");
post.Append("--");
post.Append(boundary);
post.Append("--");
return post.ToString();
}
public static string ConvertBytesToString(byte[] bytes)
{
string output = String.Empty;
MemoryStream stream = new MemoryStream(bytes);
stream.Position = 0;
using (StreamReader reader = new StreamReader(stream))
{
output = reader.ReadToEnd();
}
return output;
}

Answer 1

Hammock for Windows Phone makes this real simple.
You just add the file to the request using the AddFile method and pass it the photo stream.
var request = new RestRequest("photo", WebMethod.Post);
request.AddParameter("photo_album_id", _album.album_id);
request.AddFile("photo", filename, e.ChosenPhoto);

Answer 2

Hum are you sure that your PostForm is correct ? The content-* params should be set in the headers of your POST and not in the body ?
var request = (HttpWebRequest)WebRequest.Create(url);
request.Headers.Add(HttpRequestHeader.Authorization,"blabla");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";