Question:
I’m currently trying to upload an Image to amazon with pre-signed url.
The way it works is, I make a GET request to get the pre-signed URL and than a PUT request to upload the image by using the url returned from the GET request.
The two rules are: the Content-Type needs to be image\jpeg and the http methods must be PUT.
So, currently my upload code returns 200 but amazon rejects the data.
Here is my code:
The actual url returned for the upload is: https://mimik-apps-channel.s3-us-west-2.amazonaws.com/profiles/2312528782074206653.jpg?X-Amz-Expires=3600&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJ36SCZW7WGBAW7CQ/20170202/us-west-2/s3/aws4_request&X-Amz-Date=20170202T102202Z&X-Amz-SignedHeaders=host&X-Amz-Signature=007ad8694fe1ed83b08d4890f17b9985e169f7ab8fcd7b0d648a383c69ebc748
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var headers = Alamofire.SessionManager.defaultHTTPHeaders headers["Content-Type"] = "image/jpeg" let URL = try! URLRequest(url: url, method: .put, headers: headers) Alamofire.upload(multipartFormData: { (multipartFormData) in let compressionQuality: CGFloat = 0.8 guard let imageData = UIImageJPEGRepresentation(image, compressionQuality) else { print("Unable to get JPEG representation for image \(image)") return } multipartFormData.append(imageData, withName: "image.jpg", mimeType: "image/jpeg") // code }, with: URL, encodingCompletion: { (result) in switch result { case .success(let upload, _, _): upload.responseJSON { response in print("SUCCESS -> \(response.request?.allHTTPHeaderFields)") } case .failure(let encodingError): print(encodingError) } }) |
I suspect that when I print the http headers the Content-Type always shows multipart/form-data and not the image/jpeg that I need, but currently I’m lost on what to do to solve this.
Answer:
I actually recently had the same requirements (except I needed PNG instead of JPG).
Here is how you go about it.
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let compressionQuality: CGFloat = 0.8 guard let imageData = UIImageJPEGRepresentation(image, compressionQuality) else { print("Unable to get JPEG representation for image \(image)") return } let headers = [ "Content-Type": "image/jpeg" ] // presignedUrl is a String Alamofire.upload(imageData, to: presignedUrl, method: .put, headers: headers) .responseData { response in guard let httpResponse = response.response else { print("Something went wrong uploading") return } if let publicUrl = presignedUrl.components(separatedBy: "?").first { print(publicUrl) } } |