我在前端使用angularjs2 &Java Spring作为后台rest api &获取错误。
XMLHttpRequest cannot load 'Some url'. Request header field appkey is not allowed by Access-Control-Allow-Headers in preflight response.
这是我的angular代码
private logInUrl = 'Some url'; // URL to JSON file
authenticateUserCredentials(logIn: LogIn): Observable<ResponseClass> {
let body = JSON.stringify(logIn);
let headers = new Headers();
headers.append('Content-type', 'application/json');
headers.append('appKey', 'superadmin');
let options = new RequestOptions({ headers: headers });
return this.http.post(this.logInUrl, body, options)
.map(this.extractData)
.catch(this.handleError);
}
和我们使用过滤器的服务器端代码。
public final class CorsFilter extends OncePerRequestFilter{
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
// CORS "pre-flight" request
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
// response.addHeader("Access-Control-Allow-Headers", "Content-type,X-Requested-With,Origin,accept");
response.addHeader("x-access_token","Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");
response.addHeader("Access-Control-Max-Age", "1800");//30 min
filterChain.doFilter(request, response);
}
}
在PostMan app中,其余api与头文件appKey &内容类型
这是正确的方式来实现appKey头或请建议任何其他方式来发送自定义头或自定义数据在预定义头
Angular2将头文件小写!
所以Content-Type
将是content-type
,检查你的后端是否允许!:)
参见这个问题:在谷歌浏览器的api调用的交叉起源错误
我解释了如何测试angular2 -post方法来验证angular部分是否正常工作。