How to send a string value in POST request body with Angular?-CodePudding

I need to send an HTML string to the backend to be processed. To do this I am using Angular's HttpClient. However, the framework refuses to give me any meaningful error message other than a 400 response code. Below is my code.

Service method:

exportTestAsPdf(testHtml: string): Observable<any> {
    return this.http.post<any>(this.baseTestApiUrl   "Print", `\"${testHtml}\"`, this.requestHeaders);
}

requestHeaders:

protected get requestHeaders(): { headers: HttpHeaders | { [header: string]: string | string[]; } } {
  const headers = new HttpHeaders({
    Authorization: `Bearer ${this.authService.accessToken}`,
    'Content-Type': "application/json",
    Accept: "application/json, text/plain, */*"
  });

  return { headers };
}

ASP.NET endpoint:

[HttpPost]
public IActionResult Print([FromBody] string testHtml)
{
    // Code here
}

It doesn't give me 404 so I know the endpoint is found. What is the problem?

I followed the answers in this SO post but those did not help me.

CodePudding user response：

Maybe use "${encodeURIComponent(testHtml)}" when posting your string

CodePudding user response：

Try to send the value like this.

  exportTestAsPdf(testHtml: string): Observable<any> {
  const body = { data : "Print"    `\"${testHtml}\"`};
        return this.http.post<any>(this.baseTestApiUrl , body, {this.requestHeaders});
    }

In your backend, declare string data type named data.