Alamofire POST Request - json

Question

I was hoping someone could explain what the POST request (with parameters) accomplishes. When I run the following command, provided by Alamofire's documentation, this is what is produced:
Code
let url = "https://httpbin.org/post"
let parameters: Parameters = [
"foo": "bar",
"baz": ["a", 1],
"qux": [
"x": 1,
"y": 2,
"z": 3
]
]
Alamofire.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default).responseJSON { response in
if((response.result.value) != nil) {
let jsonVar: JSON = JSON(response.result.value!)
print(jsonVar)
}
}
Result
{
"files" : {
},
"origin" : "192.104.181.247",
"data" : "{\"baz\":[\"a\",1],\"qux\" {\"y\":2,\"x\":1,\"z\":3},\"foo\":\"bar\"}",
"headers" : {
"Accept" : "*\/*",
"Accept-Encoding" : "gzip;q=1.0, compress;q=0.5",
"Content-Type" : "application\/json",
"Host" : "httpbin.org",
"Content-Length" : "53",
"User-Agent" : "HTTPRequest\/1.0 (com.dexstrum.HTTPRequest; build:1; iOS 10.2.0) Alamofire\/4.3.0",
"Accept-Language" : "en;q=1.0"
},
"json" : {
"baz" : [
"a",
1
],
"foo" : "bar",
"qux" : {
"x" : 1,
"y" : 2,
"z" : 3
}
},
"form" : {
},
"args" : {
},
"url" : "https:\/\/httpbin.org\/post"
}
What exactly is occurring with the parameters and the POST request?

Answer 1

The url you are hitting it allows a post request. You can get json response by get or post method. Usually you fetch data by get method and send data by post method. When sending data with post request it needs some parameter to satisfy its requirement , usually its predefined.
SO you are sending a post request here with alamofire and along with some parameter which satisfy its requirements. Here you are encoding the parameter as JSONEncoding.default which means it sends the parameter data encoded as json finally you get the response as json coz you declared .responseJSON . Hope that helps.