CODEWITHSUNDEEP
iosswiftswift3
KexAri
KexAri

Reputation: 3977

How to do parameter encoding in Alamofire 4?

having trouble getting my head around parameter encoding in Alamofire 4. Before I would use the ParameterEncoding enumeration and do something like this:

Alamofire.ParameterEncoding.URL.encode(mutableURLRequest, parameters: nil).0

However this has since been replaced with the ParameterEncoding protocol:

public typealias Parameters = [String: Any]

public protocol ParameterEncoding {
    func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest
}

How could I intergrate this into my current code? How do I encode my current mutableURLRequest?

EDIT:

static func urlRequestWithComponents(urlString:String, parameters:Dictionary<String, Any>, data:Data?, contentType: ContentType, parameterName: String) -> (URLRequestConvertible, Data) {

        var urlRequest = URLRequest(url: URL(string: urlString)!)
        urlRequest.cachePolicy = .reloadIgnoringLocalCacheData
        urlRequest.httpMethod = Alamofire.HTTPMethod.post.rawValue
        let boundaryConstant = "multipart-boundary";
        let multipartContentType = "multipart/form-data;boundary="+boundaryConstant
        urlRequest.setValue(multipartContentType, forHTTPHeaderField: "Content-Type")

        // Create upload data to send
        var uploadData = Data()

        if data != nil {
            // Add multipart data
            uploadData.append("\r\n--\(boundaryConstant)\r\n".data(using: String.Encoding.utf8)!)
            if contentType == .Image_JPEG {
                uploadData.append("Content-Disposition: form-data; name=\"\(parameterName)\"; filename=\"file.jpeg\"\r\n".data(using: String.Encoding.utf8)!)
                uploadData.append("Content-Type: image/jpeg\r\n\r\n".data(using: String.Encoding.utf8)!)
            } else if contentType == .Audio {
                let dateFormatter = DateFormatter()
                dateFormatter.dateFormat = "MMyyyyddsshhmmA" // superset of OP's format
                let audioFileName = "recording-\(dateFormatter.string(from: Date())).mp4"
                uploadData.append("Content-Disposition: form-data; name=\"\(parameterName)\"; filename=\"\(audioFileName)\"\r\n".data(using: String.Encoding.utf8)!)
                uploadData.append("Content-Type: audio/mpeg\r\n\r\n".data(using: String.Encoding.utf8)!)
            }
            uploadData.append(data!)
        }

        // Add parameters
        for (key, value) in parameters {
            uploadData.append("\r\n--\(boundaryConstant)\r\n".data(using: String.Encoding.utf8)!)
            uploadData.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n\(value)".data(using: String.Encoding.utf8)!)
        }
        uploadData.append("\r\n--\(boundaryConstant)--\r\n".data(using: String.Encoding.utf8)!)

        // return URLRequestConvertible and Data
        return (urlRequest, uploadData)
    }

When doing a request:

let urlRequest = urlRequestWithComponents(urlString: url, parameters: parameters, data: imageData, contentType: .Image_JPEG, parameterName: "question_img")


    alamoManager.upload(urlRequest.1, with: urlRequest.0).responseObject { (response: DataResponse<CustomResponse>) in

     //Some code
    }

Upvotes: 17

Views: 31806

Answers (3)

user
user

Reputation: 633

do { 
    let alamofireRequest = try Alamofire.URLEncoding().encode(urlRequest as URLRequestConvertible, with: parameters)
    Alamofire.request(alamofireRequest).response { (dataResponse) in 

    }
} catch {

}

Upvotes: 2

SHISHIR R AMIN
SHISHIR R AMIN

Reputation: 412

Use Alamofire.URLEncoding()

Code Example:

//finalRequest:URLRequest? = nil

    do {
        try   finalRequest =  Alamofire.URLEncoding().encode(urlRequest as! URLRequestConvertible, with: parameters)
    } catch {
        //Handle error
    }
    return finalRequest!

Upvotes: 4

user6375148
user6375148

Reputation:

You can do a simple Alamofire request like this.

import Alamofire
import AlamofireObjectMapper
import ObjectMapper

//
//

Alamofire.request("hello.com", method: .post, parameters: ["name": "alvin"], encoding: JSONEncoding.default, headers: nil).responseObject(completionHandler: { (response : DataResponse<YourModelHere>) in


 })

You can see that I have used JSONEncoding in this request. You can choose your way of encoding in there from any of these.

In JSONEncoding

  1. default

    Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: JSONEncoding.default)

  2. prettyPrinted

    Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: JSONEncoding. prettyPrinted)

And in URLEncoding

  1. default --

    Alamofire.request("https://httpbin.org/get", parameters: parameters, encoding: URLEncoding.default)

  2. methodDependent

    Alamofire.request("https://httpbin.org/get", parameters: parameters, encoding: URLEncoding(destination: .methodDependent))

  3. queryString

  4. httpBody

    Alamofire.request("https://httpbin.org/post", parameters: parameters, encoding: URLEncoding.httpBody)

And create your own Custom Encoding like this.

public struct MyCusomEncoding: ParameterEncoding {

    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {

        var urlRequest = try urlRequest.asURLRequest()

        guard let parameters = parameters else { return urlRequest }

        do {

            let data = //

            // Do your custom stuff here, convert your parameters it into JSON, String, Something else or may be encrypted...

        urlRequest.httpBody = data

        } catch {
            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
        }

        return urlRequest
    }
}

And you can use MyCusomEncoding in your Alamofire requests.

Upvotes: 39

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