Swift Alamofire upload image in variable for rails API - swift

Question

So here is my problem, I must upload an image in my swift application to a server that use rails. I got almost everything set up, except that the rails api must receive the file data in a variable document[:file]
here is the function I use to encode my image with alamofire:
static func getDocumentCreateUploadData(parameters: [String : AnyObject], imageData: NSData) -> (uploadData:NSMutableData, contentType:String) {
let boundaryConstant = "NET-POST-boundary-\(arc4random())-\(arc4random())";
let contentType = "multipart/form-data;boundary="+boundaryConstant
let uploadData = NSMutableData()
// add image
uploadData.appendData("\r\n--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
uploadData.appendData("Content-Disposition: form-data; name=\"file\"; filename=\"file.png\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
uploadData.appendData("Content-Type: image/png\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
uploadData.appendData(imageData)
// add parameters
for (key, value) in parameters {
uploadData.appendData("\r\n--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
uploadData.appendData("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n\(value)".dataUsingEncoding(NSUTF8StringEncoding)!)
}
uploadData.appendData("\r\n--\(boundaryConstant)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
return (uploadData, contentType)
}
And then I call my api with
var imageParameters = [
"documents": [
"documentable_type": "Profile",
"documentable_id": user.profile.id!
]
]
let data = Router.getDocumentCreateUploadData(imageParameters, imageData: imageData)
let urlRequest = Router.CreateDocument(contentType: data.contentType)
Alamofire.upload(urlRequest, data.uploadData).validate().responseSwiftyJSON({ (request, response, json, error) in
if error != nil {
...
What I would like to know is how can I encode the image so that it respect the api specification.
{
"documents" : {
"file": the_file,
"documentable_type": the_documentable_type,
"documentable_id": the_documentable_id
}
}
Is there a way to achieve this?
Thank in advance.

Answer 1

I simply misundertood the api, I didn't needed the root document in my upload call
All I needed to do was remove the document root but here is the way I did it :
let imageParameters = [
"documentable_type": "Comment",
"organization_id": organizationId,
"member_id": memberId,
"user_id": user.id
]
let uuid = NSUUID().UUIDString
composeBarView.enabled = false
ProgressHUDManager.uploadingStatus()
Alamofire.upload(
Router.CreateDocument,
multipartFormData: { multipartFormData in
multipartFormData.appendBodyPart(data: imageData!, name: "file", fileName: "\(uuid).jpg", mimeType: "image/jpeg")
for (key, value) in imageParameters {
multipartFormData.appendBodyPart(data: value.dataUsingEncoding(NSUTF8StringEncoding)!, name: key)
}
},
encodingCompletion: { encodingResult in
// Handle result
}
)
The API Evolved so the code is new but I hope it can help