amazon web services - Angular and API Gateway: how to implement the PUT method? -


i'm developing web application angular 4 using typescript language (frontend side) , aws api gateway (backend side). have problem: api gateway configured data update put request works perfectly. if use code in application (correcturl string refers correct url)

  putobject(myobject: myobject) {    if (this.authservice.getauthtoken()) {     let cognitotoken = this.authservice.getauthtoken();     let headers = new headers({'content-type': 'application/json'});      headers.append('authorization', cognitotoken); //jwt token     let url = correcturl;     return this.http.put(url, json.stringify(myobject) ,           {headers})       .map(data => data.json())       .catch(this.handleerror);     } else {         let errmsg = 'error retrieving authrization token cognito                        user session';         console.error('error message: ' + errmsg);         return observable.throw(errmsg);     }   }

if invoke method (which seems correctly written), put request not executed (although json object matches perfectly) , appears on consoles: method put not allowed access-control-allow-methods in preflight response. strange, because if go "enable cors", there checkboxes in 3 methods: put, get, options (just because put has check mark, don't understand error this. invoking request in same way , works perfectly, don't explain because not happen same put!


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