Alamofire接受和内容类型JSON

Question

我正试图在Swift中向Alamofire提出GET请求.我需要设置以下标题:

Content-Type: application/json
Accept: application/json

我可以破解它并直接指定请求的标题,但我想这样做ParameterEncoding,如库中建议的那样.到目前为止我有这个:

Alamofire.request(.GET, url, encoding: .JSON)
    .validate()
    .responseJSON { (req, res, json, error) in
        if (error != nil) {
            NSLog("Error: \(error)")
            println(req)
            println(res)
        } else {
            NSLog("Success: \(url)")
            var json = JSON(json!)
        }
}

Content-Type设定,但不是Accept.我该怎么做呢？

Answer 1

我最终使用URLRequestConvertible https://github.com/Alamofire/Alamofire#urlrequestconvertible

enum Router: URLRequestConvertible {
    static let baseUrlString = "someUrl"

    case Get(url: String)

    var URLRequest: NSMutableURLRequest {
        let path: String = {
            switch self {
            case .Get(let url):
                return "/\(url)"
            }
        }()

        let URL = NSURL(string: Router.baseUrlString)!
        let URLRequest = NSMutableURLRequest(URL:
                           URL.URLByAppendingPathComponent(path))

        // set header fields
        URLRequest.setValue("application/json",
                            forHTTPHeaderField: "Content-Type")
        URLRequest.setValue("application/json",
                            forHTTPHeaderField: "Accept")

        return URLRequest.0
    }
}

然后就是:

Alamofire.request(Router.Get(url: ""))
    .validate()
    .responseJSON { (req, res, json, error) in
        if (error != nil) {
            NSLog("Error: \(error)")
            println(req)
            println(res)
        } else {
            NSLog("Success")
            var json = JSON(json!)
            NSLog("\(json)")
        }
}

另一种方法是为整个会话指定它,检查上面@ David的评论:

Alamofire.Manager.sharedInstance.session.configuration
         .HTTPAdditionalHeaders?.updateValue("application/json",
                                             forKey: "Accept")

Answer 2

直接来自Alamofire github页面的示例:

Alamofire.request(.GET, "http://httpbin.org/get", parameters: ["foo": "bar"])
         .validate(statusCode: 200..<300)
         .validate(contentType: ["application/json"])
         .response { (_, _, _, error) in
                  println(error)
         }

在你的情况下添加你想要的:

Alamofire.request(.GET, "http://httpbin.org/get", parameters: ["foo": "bar"])
         .validate(statusCode: 200..<300)
         .validate(contentType: ["application/json"])
         .validate(Accept: ["application/json"])
         .response { (_, _, _, error) in
                  println(error)
         }