如何使Swift HTTP POST成为Flask服务器？

Question

我想发布一些数据，加入烧瓶中的服务器，其代码如下：

@app.route('/tasks', methods=['POST']) 
def create_task(): 
    if not request.json or not 'title' in request.json: 
     abort(400) 

    task = { 
     'title': request.json['title'], 
     'description': request.json.get('description', ""), 
    } 

    return jsonify({'task' : task}), 201 

当我运行它，它工作正常，我可以成功地使用curl使POST请求，与预期的行为在上面的后端和命令行中的预期返回值。然而，我想使用Swift发布到这个服务器上，并且遇到了麻烦。我已经按照教程详细说明了这种行为here。特别是，我将代码放在我的AppDelegate.swift中，以便在应用启动后立即执行。完整的代码是在发布的链接，但参考我也张贴如下：

func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool { 
    var request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:4567/login")) 
    var session = NSURLSession.sharedSession() 
    request.HTTPMethod = "POST" 

    var params = ["username":"jameson", "password":"password"] as Dictionary<String, String> 

    var err: NSError? 
    request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err) 
    request.addValue("application/json", forHTTPHeaderField: "Content-Type") 
    request.addValue("application/json", forHTTPHeaderField: "Accept") 

    var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in 
     println("Response: \(response)") 
     var strData = NSString(data: data, encoding: NSUTF8StringEncoding) 
     println("Body: \(strData)") 
     var err: NSError? 
     var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary 

     // Did the JSONObjectWithData constructor return an error? If so, log the error to the console 
     if(err != nil) { 
      println(err!.localizedDescription) 
      let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding) 
      println("Error could not parse JSON: '\(jsonStr)'") 
     } 
     else { 
      // The JSONObjectWithData constructor didn't return an error. But, we should still 
      // check and make sure that json has a value using optional binding. 
      if let parseJSON = json { 
       // Okay, the parsedJSON is here, let's get the value for 'success' out of it 
       var success = parseJSON["success"] as? Int 
       println("Succes: \(success)") 
      } 
      else { 
       // Woa, okay the json object was nil, something went worng. Maybe the server isn't running? 
       let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding) 
       println("Error could not parse JSON: \(jsonStr)") 
      } 
     } 
    }) 

    task.resume() 
    return true 
} 

然而，当我启动这个程序，我有以下的在我的Xcode

Response: <NSHTTPURLResponse: 0x7fc4dae218a0> { URL: http://localhost:5000/task } { status code: 404, headers { 
    "Content-Length" = 26; 
    "Content-Type" = "application/json"; 
    Date = "Tue, 07 Oct 2014 19:22:57 GMT"; 
    Server = "Werkzeug/0.9.6 Python/2.7.5"; 
} } 
Body: { 
    "error": "Not found" 
} 
Succes: nil 

我登录我一直在处理这个问题，并且对输入进行修改，似乎后端是好的，但我想知道这个前端有什么问题，不幸的是，Swift文档目前在这一点上相当有争议，似乎是这是目前唯一可用于RESTful API调用的解决方案。

Answer 1

您的烧瓶路线是'/tasks'，而您正尝试发送到http://localhost:5000/task。这是一个错字，还是你是复数失败的受害者？