Uploading a file with Swift 3 and Alamofire

Question

I am having difficulty getting the right Alamofire syntax to upload a file. The server interface is a Rest API. I have a number of parameters I need to pass to hit the correct database and the specific record. Example:

"https://ram23jtog.tt.rp.com/ewws/EWUpdate/.json?$KB=ITIL&$table=asset_table&$login=testuser2&$password=pwd123&$lang=en&id=18005&tdd_form=2017-5-8-911-6633442.pdf"

One thing to note on the parameters is the "ID" parameter needs to be toward the end so that the table and login information is read first - or so it would appear.

I have tried to load the parameters up then append them later:

 let parameters: Parameters = [ "&tdd_form" : "test", "&id" : "\(self.inventoryDeviceVal.recId!)", "$lang" : "en", "$password" : "\(self.sharedDataVal.appUserPassword!)", "$login" : "\(self.sharedDataVal.appUserID!)", "$table" : "asset_table", "$KB" : "ITIL" ] for (key, value) in parameters { multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8.rawValue)!, withName: key) }

It looks to me like the parameters are getting truncated or there is an error that is preventing some of them from loading.

Alamofire Request:

 Alamofire.upload( multipartFormData: { multipartFormData in for (key, value) in parameters { multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8.rawValue)!, withName: key) } multipartFormData.append(fileURL, withName: fileName, fileName: fileName, mimeType: "application/pdf") }, to: updateCriteria) { (result) in switch result { case .success(let upload, _, _): upload.responseJSON { response in //self.delegate?.showSuccessAlert() print(response.request!) // original URL request print(response.response!) // URL response print(response.data!) // server data print(response.result) // result of response serialization // self.showSuccesAlert() if let JSON = response.result.value { print("JSON: \(JSON)") } } case .failure(let encodingError): //self.delegate?.showFailAlert() print(encodingError) } } }

Any Suggestions? Would it be easier to do a simple Alamofire request instead of a multipart upload?

RESOLUTION

Reconfigured my parameters per Musa's suggestion:

 let parameters = [ [ "name" : "$KB", "value" : "ITIL" ], [ "name" : "$table", "value" : "asset_table" ], [ "name" : "$login", "value" : "\(self.sharedDataVal.appUserID!)" ], [ "name" : "$password", "value" : "\(self.sharedDataVal.appUserPassword!)" ], [ "name" : "$lang", "value" : "en" ], [ "name" : "id", "value" : "\(self.inventoryDeviceVal.recId!)" ] ]

I had the parameter "tdd_form" up in the parameters definition. I adjusted the append so that it is coded correctly with the "tdd_form" parameter in the right section now that the parameters were passing correctly.

 Alamofire.upload( multipartFormData: { multipartFormData in for param in parameters { multipartFormData.append((param["value"]?.data(using: .utf8)!)!, withName: param["name"]!) } multipartFormData.append(fileURL, withName: "tdd_form", fileName: fileName, mimeType: "application/pdf") }, to: updateCriteria) { (result) in switch result { case .success(let upload, _, _): upload.responseJSON { response in //self.delegate?.showSuccessAlert() print(response.request!) // original URL request print(response.response!) // URL response print(response.data!) // server data print(response.result) // result of response serialization // self.showSuccesAlert() if let JSON = response.result.value { print("JSON: \(JSON)") } } case .failure(let encodingError): //self.delegate?.showFailAlert() print(encodingError) } }

Works perfectly!!

Personally I couldn't get the URL query parameters to work with MultipartFormData, so I'm not too sure. The way I solved it in my application was to build the URL with the query params myself, and then only append the file to the MultipartFormData and upload to that URL. Example: multipartFormData.append(file, withName: "file") and then the to: parameter on the upload method is to: "\(url)?email=\(email)&type=\(type)" but replace the query parameters with the ones you need. — Rohan
– Rohan, Commented May 8, 2017 at 15:50

Musa almatri · Accepted Answer · 2017-05-08 16:16:59Z

I had the same issue and this is how I solved it

 var parameters = [ [ "name": "tdd_form", "value": "test" ], [ "name": "id", "value": "\(self.inventoryDeviceVal.recId!)" ] . . . etc ] Alamofire.upload( multipartFormData: { multipartFormData in //convert parameters to data for param in parameters { multipartFormData.append((param["value"]?.data(using: .utf8)!)!, withName: param["name"]!) } //Add the data //Mine was image , this is how I did it //let uuid = UUID().uuidString.lowercased() //multipartFormData.append(imgData, withName: "images[]", fileName: "\(uuid).jpg", mimeType: "image/jpeg") multipartFormData.append(fileURL, withName: fileName, fileName: fileName, mimeType: "application/pdf") }, to: updateCriteria){ (result) in switch result { case .success(let upload, _, _): upload.responseJSON { response in //self.delegate?.showSuccessAlert() print(response.request!) // original URL request print(response.response!) // URL response print(response.data!) // server data print(response.result) // result of response serialization // self.showSuccesAlert() if let JSON = response.result.value { print("JSON: \(JSON)") } } case .failure(let encodingError): //self.delegate?.showFailAlert() print(encodingError) } }

Musa, You were absolutely right with how you set up your parameters. I had to massage some of those parameters for my own purpose, but it set me down the right path. Been working on this for weeks. I will post my changes so everyone can see.

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