swift - Alamofire 2.0 的放置请求失败

Question

我最近升级到 Alamofire 2.0，现在我的 Put 请求失败并出现 400 错误，而之前它工作正常。我使用代码执行调用:

Alamofire.request(Router.Put(query: url, params: params, encoding: .JSON))
    .validate()
    .responseJSON() {
        (request, response, result) in

        print("request: \(request)")
        print("response: \(response)")
        print("result: \(result)")

        switch result {
        case .Success(_):
            // success
        case .Failure(let data, _):
            // error occured
        }
}

和我的自定义路由器类:

enum Router: URLRequestConvertible {

    case Get(query: String, params: [String: AnyObject]?)
    case Post(query: String, params: [String: AnyObject]?)
    case Put(query: String, params: [String: AnyObject]?, encoding: ParameterEncoding)
    case Delete(query: String, params: [String: AnyObject]?)

    var URLRequest: NSMutableURLRequest {
        var encodeMethod: Alamofire.ParameterEncoding = Alamofire.ParameterEncoding.URL

        // Default to GET
        var httpMethod: String = Alamofire.Method.GET.rawValue

        let (path, parameters): (String, [String: AnyObject]?) = {
            switch self {
            case .Get(let query, let params):
                // Set the request call
                httpMethod = Alamofire.Method.GET.rawValue
                // Return the query
                return (query, params)
            case .Post(let query, let params):
                // Set the request call
                httpMethod = Alamofire.Method.POST.rawValue
                // Return the query
                return (query, params)
            case .Put(let query, let params, let encoding):
                // Set the request call
                httpMethod = Alamofire.Method.PUT.rawValue
                // Set the encoding
                encodeMethod = encoding
                // Return the query
                return (query, params)
            case .Delete(let query, let params):
                // Set the request call
                httpMethod = Alamofire.Method.DELETE.rawValue
                // Return the query
                return (query, params)
            }
        }()

        // Create the URL Request
        let URLRequest = NSMutableURLRequest(URL: NSURL(string: Globals.BASE_URL + path)!)
        // set header fields
        if let key = NSUserDefaults.standardUserDefaults().stringForKey(Globals.NS_KEY_SESSION) {
            URLRequest.setValue(key, forHTTPHeaderField: "X-XX-API")
        }
        // Add user agent
        if let userAgent = NSUserDefaults.standardUserDefaults().stringForKey(Globals.NS_KEY_USER_AGENT) {
        URLRequest.setValue(userAgent, forHTTPHeaderField: "User-Agent")
        }

        // Set the HTTP method
        URLRequest.HTTPMethod = httpMethod

        URLRequest.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData

        return encodeMethod.encode(URLRequest, parameters: parameters).0
    }
}

响应不是调用成功，而是:

response: Optional(<NSHTTPURLResponse: 0x7fcee15b34d0> { URL: https://apiurl } { status code: 400, headers {
"Cache-Control" = "no-cache";
"Content-Length" = 26;
"Content-Type" = "application/json; charset=utf-8";
Date = "Tue, 15 Sep 2015 15:33:50 GMT";
Expires = "-1";
Pragma = "no-cache";
Server = "Microsoft-IIS/8.5";
} })

我调查了这个问题，在服务器端，Content-Type 对于请求来说是空白的，而它应该以 application/json 的形式出现。当请求中有正文数据时，Content-Type 应自动添加。我已设置参数:

// Save the profile
var params: [String: AnyObject] = ["indexPhoto": userProfile.indexPhoto,
    "dob": df.stringFromDate(userProfile.dob) as NSString,
    "identAs": userProfile.identAs]
// Add manually since creating the dictionary all at once is too much for swift to handle
params.updateValue(String(format:"%.2f", userProfile.heightIn), forKey: "heightIn")
params.updateValue(String(format:"%.2f", userProfile.weightLbs), forKey: "weightLbs")
params.updateValue(userProfile.eyes, forKey: "eyes")
params.updateValue(userProfile.hair, forKey: "hair")
...

我可能会遗漏什么吗？在我升级到 Alamofire 2.0 之前，这个调用工作得很好。

Answer 1

也许有不同的方法，但我通过发送空参数而不是 nil 解决了同样的问题。使用 .PUT 时我不使用任何参数，因为该服务器不知道如何对请求和响应进行编码(即使我在 header 内显式设置内容类型，我也会在服务器上收到空白内容类型)，所以我的解决方案是发送空参数，如下面的代码所示。希望它对某人有帮助。

var url = https://api.mysite.com/v1/issue/369613/delete

let params = ["":""]

let headers = NetworkConnection.addAuthorizationHeader(token, tokenType: tokenType)
manager.request(.PUT, url, parameters: params, encoding: .JSON, headers: headers)
        .responseJSON { response in
            if let JSONdata = response.result.value {
                print("JSONdata: \(JSONdata)")
            }
}