c# - Cross-Origin-request Blocked - Missing Token 'Access-Control-Allow-Headers' (No Web.config) -


there many questions regarding issue, no answers questions fix mine, , since lost on 3rd page of google, time ask question..

issue 1: trying make requests localhost external api.

for external api, cors preflight returns 200 actual method never fired: enter image description here

service:

   /**      *       * @param postalcode      * @param housenumber      */     getaddressfrompostalcode(postalcode: string, housenumber: string) {         // initialize empty object         this.addressfrompostalcode = '';          //  search parameters         let params: urlsearchparams = new urlsearchparams();         params.set('postcode', postalcode);         params.set('number', housenumber);          //  apply headers         let headers = new headers();         headers.append('access-control-allow-headers', 'content-type');         headers.append('access-control-allow-methods', 'get');         headers.append('access-control-allow-origin', '*');         headers.append('x-api-key', this.apikey);          //  request options         let options = new requestoptions({ headers: headers, search: params });          //  request         return this.http.get(this.basepostalcodeurl, options)             .map(response => response.json());     }

component

getaddressfrompostalcode() {         this.isrequesting = true;          this.postalcodeservice.getaddressfrompostalcode(this.contract.postalcode, this.contract.housenumber)             .finally(() => this.isrequesting = false)             .subscribe(                 result => {                     if (result) {                             this.deliveryaddress.street = json.stringify(result)                         } else {                             this.delivery.street = 'no address found';                         }                     },                     error => this.errors = error             );      }

it seems failing @ service, not returning result in component.

my startup.cs

// method gets called runtime. use method add services container.     public void configureservices(iservicecollection services)     {        // ********************       // setup cors       // ********************       // add service , create policy options       services.addcors(options =>       {         options.addpolicy("allowall",             builder => builder.allowanyorigin()             .allowanymethod()             //corsbuilder.withorigins(             //"http://localhost:4200",              //"http://localhost:5000",              //"https://api.postcodeapi.nu/v2/addresses"             .allowanyheader()             .allowcredentials());       });        // adds services required building       services.addmvc();  ...    // method gets called runtime. use method configure http request pipeline.     public void configure(iapplicationbuilder app, ihostingenvironment env, iloggerfactory loggerfactory)     {       //  apply cors requests       app.usecors("allowall");        app.useexceptionhandler(appbuilder =>       {         appbuilder.run(async context =>         {           context.response.headers.add("access-control-allow-origin", "*");           context.response.statuscode = 500;           await context.response.writeasync("internal server error");         });       });  ...   app.usemvc();

issue 2: when posting data internal asp web api receive same header ‘access-control-allow-origin’ missing error, but does post data server (weird)

thanks in advance,

edit: request issue 1 accepted when using firefox plugin: https://addons.mozilla.org/en-us/firefox/addon/cors-everywhere/

but why?


Comments

Post a Comment

Popular posts from this blog

PHP and MySQL WP -

i trying accomplish 2 things here code. writing php directly wp page using insert php plugin. 1) query mysql database , return results 1 column 4 columns. 2) make each result own hyperlink directs user new wp page runs new query on page. i able query show results , turn results dynamic hyperlink, cannot formatting down. right returns result 1 column. here have: [insert_php] $servername = "localhost"; $username = "login"; //edited privacy $password = "password"; //edited privacy $database = "database"; //edited privacy // create connection $conn = new mysqli($servername, $username, $password, $database); // check connection if ($conn->connect_error) { die("connection failed: " . $conn->connect_error); } echo "connected successfully"; //get results database $result = mysqli_query($conn,"select mine mines order mine"); $all_property = array(); //declare array saving property //showing proper...
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

go - golang pprof for c library code -

i have been trying profile golang application pprof, seems details of c code(linked static library) missed in output result. flame graph from frame graph can see c code time consuming reported within "runtime._externalcode", no details @ all. , sure static library compiled debug enable. so there way make pprof details(like stack trace) of 3rd party c code? or there other golang profiling tool this?
Read more