ios - statusCode should be 200, but is 415 -


i trying post simple string, continuously getting http 415 unsupported media type error. tried converting parameter json still didn't work.

method updated

func requestusingpostmethod(url: string, parameter: string, completion: @escaping (_ success: [string : anyobject]) -> void) {      //@escaping...if closure passed argument function , invoked after function returns, closure @escaping.      var request = urlrequest(url: url(string: url)!)     request.addvalue("application/json", forhttpheaderfield: "content-type")     request.addvalue("application/json", forhttpheaderfield: "accept")     request.httpmethod = "post"     let poststring = parameter       request.httpbody = try? jsonserialization.data(withjsonobject: [poststring])       //  request.httpbody = poststring.data(using: .utf8)     let task = urlsession.shared.datatask(with: request) { data, response, error in          guard let data = data, error == nil else {  // check fundamental networking error              print("error=\(string(describing: error))")             return         }          if let httpstatus = response as? httpurlresponse, httpstatus.statuscode != 200 {  // check http errors              print("statuscode should 200, \(httpstatus.statuscode)")             print(response!)             return          }          let responsestring  = try! jsonserialization.jsonobject(with: data, options: .allowfragments) as! [string : anyobject]         completion(responsestring)       }      task.resume()  }

request

networkcall().requestusingpostmethod(url: "http://192.168.50.119:8181/rest/items/wemo_lamp_switch", parameter: "on", completion: { response in              print("--------------------------------------------------------------")             print(response)            // let jsonresults = json(string: response)         })

error

statuscode should 200, 415 { url: http://192.168.50.119:8181/rest/items/wemo_lamp_switch } { status code: 415, headers { "content-length" = 282; "content-type" = "application/json"; date = "tue, 12 sep 2017 08:33:16 gmt"; server = "jetty(9.2.19.v20160908)"; } }

i updated question answers still getting same error.

postman data

{     "id": "6f5d4f8a-612a-10f9-71b5-6dc8ba668885",     "name": "simpledata",     "description": "",     "order": [         "65df8736-1069-b0f0-3a1d-c318ce1810e0"     ],     "folders": [],     "folders_order": [],     "timestamp": 1505208950131,     "owner": 0,     "public": false,     "requests": [         {             "id": "65df8736-1069-b0f0-3a1d-c318ce1810e0",             "headers": "",             "headerdata": [],             "url": "http://192.168.50.119:8181/rest/items/wemo_lamp_switch",             "queryparams": [],             "pathvariables": {},             "pathvariabledata": [],             "prerequestscript": null,             "method": "post",             "collectionid": "6f5d4f8a-612a-10f9-71b5-6dc8ba668885",             "data": [],             "datamode": "raw",             "name": "http://192.168.50.119:8181/rest/items/wemo_lamp_switch",             "description": "",             "descriptionformat": "html",             "time": 1505208951279,             "version": 2,             "responses": [],             "tests": null,             "currenthelper": "normal",             "helperattributes": {},             "rawmodedata": "off"         }     ] } 

request.addvalue("application/json", forhttpheaderfield: "content-type") request.addvalue("application/json", forhttpheaderfield: "accept")

also

let theparam = jsonserialization.data(withjsonobject: parameter)

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