using Alamofire 5 to upload file to RocketChat server - swift

Question

I'm using Alamofire 5, and I'm trying to upload an image to a Rocket Chat server. The corresponding curl statement that I need to duplicate using AF is at the following link:
(link to documentation: https://docs.rocket.chat/api/rest-api/methods/rooms/upload)
I've been trying to upload using multipartFormData with no success. I've also attempted to bypass Alamofire altogether and use Swift URLSession. The best I can do is get the same error message from the server, which is "errorType": invalid-field."
My code as it stands right now:
let url = URL_MESSAGES + "rooms.upload/\(_group._id ?? "")"
let boundary = UUID().uuidString
let headers: HTTPHeaders = [
"X-Auth-Token": authToken,
"X-User-Id": me._id ?? "",
"Content-type":"multipart/form-data; boundary=\(boundary)"
]
if let data = image.jpeg(.medium) {
print(data.count)
AF.upload(
multipartFormData: { multipartFormData in
multipartFormData.append(data, withName: "image", fileName: "image.jpeg", mimeType: "image/jpeg")
},
to: url, method: .post , headers: header)
.response { resp in
print(resp)
}
.cURLDescription { description in
print(description)
}
.responseString { [weak self] (response) in
DispatchQueue.main.async {
if response.error == nil {
guard let data = response.data else {
return completion(true,[:])
}
if let json = try? JSON(data: data) {
let dictionaryIn = json.rawValue as! [String : Any]
if (self?.isSuccess(data: dictionaryIn))! {
completion(true,json.rawValue as! [String : Any])
}else{
completion(false,[:])
self?.handleError(data: dictionaryIn)
}
}
}else{
completion(false,[:])
self?.handleError(data: [:])
}
}
}
}
}

Answer 1

I think you're breaking the upload by trying to set your own boundary. Alamofire will that for you automatically. Try removing the header.

Answer 2

The above code works perfectly, when I changed this:
AF.upload(
multipartFormData: { multipartFormData in
multipartFormData.append(data, withName: "image", fileName: "image.jpeg", mimeType: "image/jpeg")
to:
AF.upload(
multipartFormData: { multipartFormData in
multipartFormData.append(data, withName: "file", fileName: "image.jpeg", mimeType: "image/jpeg")
Swapping out "image" for "file" fixed everything. I went with "image" because this is what every Alamofire tutorial I could find said to do. However, RocketChat requires it to be "file". It is in the documentation, but I didn't realize that's what it was telling me to do. Specifically, in the documentation, it says:
"Note: For some file types if uploading via curl you may need to set the mime type.
With some file types, curl will upload the file as application/octet-stream. You can pass a custom mime type like this: -F "file=#file.wav;type=audio/wav" "
I was trying -F "image=#file.wav;type=audio/wav" when translated from Alamofire. It needs to be: -F "file=#file.wav;type=audio/wav"