如何将http请求打印到控制台

是否可以在执行实际请求之前打印整个http(s)请求？

这是我的代码:

let postsEndpoint: String = "https://www.example.com/api/"
guard let postsURL = NSURL(string: postsEndpoint) else {
    throw APICallError.other("cannot create URL")
}
let postsURLRequest = NSMutableURLRequest(URL: postsURL)
postsURLRequest.HTTPMethod = "POST"
print(UTF8EncodedJSON)
postsURLRequest.HTTPBody = UTF8EncodedJSON
print(postsURLRequest) 

let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)

let task = session.dataTaskWithRequest(postsURLRequest, completionHandler: {
    (data, response, error) in
    //handle response
})

这先打印十六进制的json,然后:

{ URL: https://www.ritzie.nl/api/v2 }

这对我没有多大帮助.我只想打印我的整个请求,就像你在Firefox上的firebug中看到它一样.

- 编辑 -

为了澄清,我不打算打印我的json.关于SO已经有足够的问题了.我希望我的完整请求打印出来像这样:

POST /api/v2/ HTTP/1.1

HTTP headers:
Host: www.example.ocm
Origin: http://www.example.com
Connection: keep-alive
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/\*;q=0.8
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/601.3.9 (KHTML, like Gecko) Version/9.0.2 Safari/601.3.9
Referer: http://www.ritzie.nl/api/test.php
Accept-Language: en-us
Accept-Encoding: gzip, deflate

request body:
data=%7B%22action%22%3A+%22vehicleRecords%22%2C%0D%0A%22token%22%3A+%22token_04e01fdc78205f0f6542bd523519e12fd3329ba9%22%2C%0D%0A%22vehicle%22%3A+%22vehicle_e5b79b2e%22%7D

或这个: