angular请求标头字段错误

Question

错误：预检响应中的Access-Control-Allow-Headers不允许使用请求标头字段内容类型。

这是我的代码：

import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';

import 'rxjs/add/operator/map';

@Injectable()

export class JobSearch{

constructor(private _http: Http){}

private _jobListUrl = 'https://api.shiftjobapp.com/api/v3/job_list?token=xxxx';

private _jobDetailsUrl = 'https://api.shiftjobapp.com/api/v3/job_detailed?token=xxxx';  

getJobs(){
    return this._http.post(this._jobListUrl)
        .map((response: Response) => response.json());
}

getJobDetails(){
    return this._http.post(this._jobDetailsUrl, {job_id: 1390})
        .map((response: Response) => console.log(response.json()));
}

}