这篇文章给大家分享的是有关Angular http 拦截器的使用方法。小编觉得挺实用的，因此分享给大家学习。如下资料是关于Angular http 拦截器的内容。

Angular http的拦截器一般用来处理每个http都需要添加的参数或者是统一处理错误信息

Angular1.x的http拦截器处理：

$httpProvider.interceptors.push(function ($q) { return { request: function (config) { var url = config.url; //这个token表示是在登录状态, 不要用在header中，options无法设置header if(TASApp["x-auth-token"]){ if(url.indexOf("?") == -1){ url+="?x-auth-token="+TASApp["x-auth-token"]; }else{ url+="&x-auth-token="+TASApp["x-auth-token"]; } } config.url = url; return config || $q.reject(config); }, response: function (res) { //统一处理返回信息，如果是错误则在这里统一处理，注意如果这样处理错误(reject)，那么所有的错误信息会进入http的error回调，在success里默认就是成功，都可以不判断data.success if (res.data.success == false) { TASApp.ajaxReturnErrorHandler(res.data["info"]); //TASApp是一个constant对象 return $q.reject(res.data); //will go to error callback } else if (res.data.success == "relogin") { TASApp.relogin(); return $q.reject(res.data); //will go to error callback } else { return res; //will go to success callback } }, responseError: function (res) { //统一处理请求没发成功的错误 TASApp.ajaxErrorHandler(); return $q.reject(res); } }; });

Angular2.x的http拦截器处理：

export class AddHttpHeaderInterceptor implements HttpInterceptor { constructor(private formService: FormService, private formHelper: FormHelper, private message: NzMessageService, private lang: Lang) { } intercept(req: HttpRequest<any>, next: HttpHandler) { // set X-Requested-With that serve need to for ajax let clonedReq = req.clone({headers: req.headers.set('X-Requested-With', 'XMLHttpRequest')}); if (this.formService.currentUser) { //options http can not add x-auth-token, use param //clonedReq = req.clone({headers: req.headers.set('x-auth-token', this.formService.currentUser['x-auth-token'])}); //global add param x-auth-token and clonedReq = req.clone({params: req.params.set('x-auth-token', this.formService.currentUser['x-auth-token']), headers: req.headers.set('X-Requested-With', 'XMLHttpRequest')}); } // =========================================================== // global handle error // =========================================================== return next.handle(clonedReq).pipe( catchError(this.formService.handleError), //handle success false filter(res => { if(res['statusText'] && res['statusText'] === 'OK'){ if(res['body'] && (res['body']['success'] == false || res['body']['success']=='relogin')){ if(res['body']['success'] == 'relogin'){ //handle relogin here, can add some message (<any>window).location.href = this.formHelper.getBaseUrl()+'login'; return false; } else { //if no info will have a code this.message.error(res['body']['info'] || this.lang.lang["errorCode"][res['body']['code']]); console.log(res); //if return false will not trigger subscribe function, if you need trigger return true return true; /* this will fire subscribe error handle, that means if backend error will go to subscribe->error, subscribe->next is only handle backend success, bug if services use like MyShares/getFormInfo that will have problem, need add error handle for every http request and run handler function this.http.get(url).subscribe(obj=>{handle when backend success},error=>{handle when backend error} */ //throw new Error("error"); } } } return true; }) ); }}@NgModule({ declarations: [ ], imports: [ ], providers: [ {provide: HTTP_INTERCEPTORS, useClass: AddHttpHeaderInterceptor, deps: [FormService, FormHelper, NzMessageService, Lang], multi: true}, {provide: APP_INITIALIZER, useFactory: loginAndInitForm, deps: [FormService], multi: true}, {provide: NZ_I18N, useValue: zh_CN}, {provide: NZ_MODAL_CONFIG, useValue: {autoBodyPadding: true}}, {provide: NZ_MESSAGE_CONFIG, useValue: {nzDuration: 3000}} ], bootstrap: [AppComponent]})

以上就是Angular http 拦截器的使用方法介绍，详细使用情况还得要大家自己使用过才能知道具体要领。如果想阅读更多相关内容的文章，欢迎关注亿速云行业资讯频道！