multipart POST request directly in ASIFormDataRequest - cocoa

Question

So you think it would be easy to find a direct example of POST information to ASIFormDataRequest, but I havent found a 1:1 in these formats. Here's the POST request I want to send:
POST /fileXfer HTTP/1.1
Content-Type: multipart/form-data; boundary=AaB03x
Content-Length: 200
AppID:myID
TransferID:abcd1234
-- AaB03x
Content-Disposition: form-data; name="data"; filename="xxx"
Content-Type: application/octet-stream
Content-Length: 100
... contents of file ...
--AaB03x--
EDIT:
Turns out my problems were more with the server receiving the data. But this is what I ended up with!
NSURL *url = [NSURL URLWithString:#"http://IP:PORT/fileXfer"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostFormat:ASIMultipartFormDataPostFormat];
//Sets headers of POST
[request addRequestHeader:#"X-Application-Id" value:#"myID"];
[request addRequestHeader:#"X-Transfer-Id" value:#"abcd1234"];
//Sets data
NSData *fileData = [NSData dataWithContentsOfFile:kEncryptedFilePath];
[request setData:fileData withFileName:#"xxx" andContentType:#"application/octet-stream" forKey:#"data"];
[request setDelegate:self];
[request startAsynchronous];
I also added the following line to ASIFormDataRequest's buildMultipartFormDataPostBody where Content-Disposition and Content-Type are set:
[self appendPostString:[NSString stringWithFormat:#"Content-Length: %lu\r\n\r\n", [data length]]];`
I'm not sure if there's an easier way to add that line directly from the request, but out of the things I tried, this seemed to be the one that worked.

Answer 1

Rather than building the HTTP body manually, which may lead to errors, you should better use the methods provided by ASIFormDataRequest.
NSURL *url = [NSURL URLWithString:#"http://IP:PORT/fileXfer"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request addRequestHeader:#"X-Application-Id" value:#"myID"];
[request addRequestHeader:#"X-Transfer-Id" value:#"abcd1234"];
[request setData:[self fileData] withFileName:#"xxx" andContentType:#"application/octet-stream" forKey:#"data"];
[request setDelegate:self];
[request startAsynchronous];