angular5.x拦截器 给get post请求添加参数user_token

export class Interceptor implements HttpInterceptor {

public myAppListService;

constructor(private message: NzMessageService, private injector: Injector) {

}

public intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

this.myAppListService = this.injector.get(MyAppListService);

this.myAppListService.selectedUserToken = getQueryString(\'user_token\') || sessionStorage.getItem(\'user_token\');

if (this.myAppListService.selectedUserToken !== \'null\') {

let newParams;

let newBody;

if (req.method === \'GET\') {

let userToken = this.myAppListService.selectedUserToken;

if (userToken) {

newParams = req.params.set(\'user_token\', userToken);

const comReq = req.clone({

params: newParams,

body: newBody

});

return next.handle(comReq).do((res) => {

this.handleResponse(res);

});

}

} else if (req.method === \'POST\' && req.headers.get(\'content-type\').indexOf(\'application/x-www-form-urlencoded;\') > -1) {

// if (req.body.indexOf(\'user_token=\')) {

let userToken = this.myAppListService.selectedUserToken;

if (userToken) {

if (req.body.match(/(^|&)user_token=([^&]*)(&|$)/)) {

newBody = req.body.replace(req.body.match(/(^|&)user_token=([^&]*)(&|$)/)[0], \'\');

newBody = newBody + \'&user_token=\' + userToken;

} else {

newBody = \'&user_token=\' + userToken;

}

const comReq = req.clone({

params: newParams,

body: newBody

});

return next.handle(comReq).do((res) => {

this.handleResponse(res);

});

}

// }

}

}

const comReq = req.clone();

return next.handle(comReq).do((res) => {

this.handleResponse(res);

});

}

public handleResponse(res) {

if (res instanceof HttpResponse) {

const data = res.body;

if (data.status && data.status === 2) {

this.message.error(data.data);

location.href = \'/index.php?r=Login/Ulogin\';

}

if (data.status && data.status === 1 && data.data === \'应用不存在，或者您不是应用管理者\') {

location.href = \'/index.php?r=Login/Ulogin\';

return;

}

}

}

}