http - How to perform callback in angular2? -

i have following code in angular2 service:

this.returned: string;  parseresponse() : void {   console.log("response:",this.returned);  }  sendhttp(text: string): void {   var to_send = json.stringify({"text": text});   var headers = new headers();    headers.append('content-type', 'application/json');   this.http    .post('http://localhost:8080/',       to_send, {        headers: headers      })    .map(res => {        this.parseresponse()    })    .subscribe(      function(response) { console.log("success response" + response)},      function(error) { console.log("error happened" + error)},      function() { parseresponse(); }    );  } 

but unfortunately parseresponse() not running after nodejs server returns "testing". however, request received correctly. me please?

edit:

this actual code. nothing console.logged. request sent. no callbacks executed.

parseresponse(res: response) : void {   console.log("response:",res);   }   sendhttp(text: string): void {   var to_send = "sending";   var headers = new headers();    headers.append('content-type', 'application/json');   this.http    .post('http://localhost:8080/',       to_send, {        headers: headers      })    .map((res) => res.json() )    .subscribe(      (response) => { console.log("success response" + response)},      (error) => { console.log("error happened" + error)},      () => { this.parseresponse(res); }    );  } 

you want either pass response method:

.map(res => this.parseresponse(res)) 

or pass method reference:

.map(this.parseresponse) 

also parseresponse method should return "parsed" response:

parseresponse(res: response): any{     let jsonres = res.json();     console.log("response:", jsonres);      return jsonres; }