Angular 6：无法正确设置 http Header 的 Content-Type

Question

I'm trying to make a post call using HttpHeader in angular 6 And I set Content-Type to application/json. But the server get x-www-form-urlencoded instead of application/json for Content-Type.

service.ts

 myFunction(id: string, name: string, fields: string[]) { const body = { id: id, name: name, fields: fields }; let headers = new HttpHeaders(); headers= headers.set('content-type', 'application/json'); return this.http.post(this.URL , body, {headers}); }

component.ts

 submit(){ this.myService.myFunction(this.id, this.form.value.name, this.form.value.fields).subscribe((res:any) => { console.log(this.form); }, error => { console.log(JSON.parse(error.error).errors); }) }

Answer 1

您需要在选项中设置标题。

return this.http.post(this.URL , body, {headers : new HttpHeaders({ 'Content-Type': 'application/json' })});

Answer 2

Just use append function to add new headers and finally set the headers on options

Try something like this

let header = new HttpHeaders();
headers= headers.append('content-type', 'application/json');
return this.http.post(this.URL , body, {headers : header});

If it doesn't work try to add header like this

let header = new HttpHeaders({'content-type': 'application/json'});

Hope it helps - happy coding :)