Print Alamofire request body

Question

I'm using Alamofire library for connecting with an API in iOs. I have a problem in one of the connection, and I don't know if it is because of the data encoded in the body or any other thing. In order to detect my error, I'm trying to print in the console the request body for checking if I'm sending the correct data structure.

My code is the following:

func updateUser (#user: User, completionHandler: (responseObject: User?, error: AnyObject?) -> ()) {
    let parameters = [
        "_id": "\(user._id!)",
        "email": "\(user.email!)",
        "media": "\(Mapper().toJSONArray(user.media!))",
        "blogs": "\(Mapper().toJSONArray(user.blogs!))"
    ]

    var manager = Alamofire.Manager.sharedInstance
    manager.request(.PUT, apiUrl + "/route/to/api", parameters: parameters, encoding: .JSON)
        .responseObject{ (req: NSURLRequest, res: NSHTTPURLResponse?, user: User?, data: AnyObject?, error: NSError?) in
            if(error != nil) {
                NSLog("Error API updateUser: \(error)")
            }
            else {
                completionHandler(responseObject: user as User?, error: data)
            }
    }
}

User is a Mappable object, since I'm using ObjectMapper combined with Alamofire. User is defined by the following code:

class User: Mappable {
   var _id: String?
   var name: String?
   var media: [Media]?

   init(_id: String, name: String, media: [Media]){
      self._id = _id;
      self.name = name;
      self.media = media
   }

   required init=(_ map: Map){
      mapping(map)
   }

   func mapping(map: Map){
      _id <- map["_id"]
      name <- map["name"]
      media <- map["media"]
   }
}

Media is defined like User, but with different variables.

Also, I would like to know, in addition of printing request body, if I could include the parameters to Alimofire request in a more efficient way (something like parsing the User object and substituting it for the parameters variable)

Any idea about my problems?

EDIT:

Following the suggestion of @Travis, finally I found the solution for printing the request body. Below you could find the code:

println("request body: \(NSString(data:req.HTTPBody!, encoding:NSUTF8StringEncoding) as String?)")

About passing as parameters an object I couldn't work it, I followed the official documentation, but I could do it.

Solution 1

The answer to your first question is,

println("request body: \(request.HTTPBody)")

As far as your 2nd question goes, there's a whole section on API Parameter Abstraction as well as CRUD & Authorization on the Alamofire main page.

Solution 2

For Swift 3+

print(NSString(data: (response.request?.httpBody)!, encoding: String.Encoding.utf8.rawValue))

Solution 3

Added the below extension for the Request class for printing the logs.

extension Request {
    public func debugLog() -> Self {
        #if DEBUG
            debugPrint("=======================================")
            debugPrint(self)
            debugPrint("=======================================")
        #endif
        return self
    }
}

To use the extension, just use debugLog() after defining your request, like so:

Alamofire.request(url).debugLog()
            .responseJSON( completionHandler: { response in
   })

reference url : link

Solution 4

Swift 5

print(response.debugDescription)

Solution 5

For Swift 4 & Swift 5, just like that :

String(data: data!, encoding: String.Encoding.utf8)

If not in DefaultDataResponse extension or object, replace data with yourObject.response.data

View more solutions

Comments

[Alfonso]

Thank you for your answer, but request.HTTBody return NSData object, and I cannot know if it is the string that I expect to have. I expect to obtain something like this: // HTTP body: {"foo": [1, 2, 3], "bar": {"baz": "qux"}} (with my own variables), and I obtain the following: <7b225f69 64223a22 35353962 61656165...

[Travis]

There are a myriad of ways to convert NSData to a string (or JSON). I'd suggest using the search on here to find one of them.

[Kevin]

That's really good demo based on Swift3.0, its working on my side.

[Anirudha Mahale]

How do I print the request body of Alamofire.upload() method? I am doing multipart.

[Anirudha Mahale]

How do I print the request body of Alamofire.upload() method? I am doing multipart.