javascript - 如何在 Angular 的请求 header 中发送时区偏移量？

Question

我想在请求 header 中发送时区偏移。但我还没有找到任何方法来做到这一点。

我的代码如下:

import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs';
import { Injectable } from '@angular/core';
import { SessionProvider } from './session.provider';

@Injectable({ providedIn: 'root' })
export class TokenInterceptor implements HttpInterceptor {

  constructor(private provider: SessionProvider) {}

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    const update = addHeaders(req, this.provider.session);
    const request = req.clone(update);
    return next.handle(request);
  }
}

function addHeaders(req: HttpRequest<any>, session: any): any {
  let headers = req.headers;
  if (session?.stationId) {
    headers = headers.set('wid', session.stationId);
  }
  if (session?.accessToken) {
    headers = headers.set('Authorization', 'Bearer ' + session.accessToken);
  }
  return { headers };
}

我想在 addHeaders 函数中添加时区偏移。如果有人知道如何做到这一点，请分享您的想法

Answer 1

可以按如下方式完成:

function addHeaders(req: HttpRequest<any>, session: any): any {
  let headers = req.headers;
  if (session?.stationId) {
    headers = headers.set('wid', session.stationId);
  }
  if (session?.accessToken) {
    headers = headers.set('Authorization', 'Bearer ' + session.accessToken);
  }
  headers = headers.set('tz-offset', getTimeZoneOffset());

  return { headers };
}


function getTimeZoneOffset(): string {
  const tzOffset = new Date().toTimeString().match(/([\+-]\d{4})/)[0];
  return [tzOffset.slice(0, 3), ':', tzOffset.slice(3)].join('');
}