中止/取消/放弃角度js中的http请求并再次重试 [英] Abort/cancel/abandon a http request in angular js and retry it again

问题描述

我正在处理一个应用程序，如果某个时间过去，我必须停止收听请求，就像在60秒内没有来自请求的响应那样我必须中止该请求，并且一次有多个请求。我不知道如何用中止时间（60秒）跟踪每个请求。我的意思是我怎么知道哪个请求会中止。

I am working on an application in which i have to stop listening to a request if certain time is passed like if there is no response from a request in 60 secs then i have to abort that request and also there are multiple requests are going at a time. I don't know know how to keep track of each request with abort time(60 secs). I mean how would i know which request is to abort.

我想在我的 AngularJS 拦截器中实现这个功能。我已经尝试了许多博客，并发布声称实现此功能，但没有任何帮助我

I want to implement this functionality in my AngularJS interceptor. I have tried many blogs and post that claims to achieve this functionality but nothing helps me

这里是我的拦截器代码

    $httpProvider.interceptors.push(['$cookies', '$rootScope', '$q', '$localStorage', '$sessionStorage','$timeout', function ($cookies, $rootScope, $q, $localStorage, $sessionStorage, $timeout) {
        return {
            'request': function (config) {
                config.headers = config.headers || {};
                if (typeof config.data !== 'object') {
                    config.headers['Content-Type'] = 'application/x-www-form-urlencoded';
                }
                config.headers.Accept = 'application/json;odata=verbose';
                config.headers['X-Requested-With'] = 'XMLHttpRequest';
                var token = $localStorage.authToken || $sessionStorage.authToken;                    
                if (token) {
                    config.headers.Authorization = 'Bearer ' + token;
                }

                return config;
            },
            'responseError': function (response) {
                var status = response.status;
                var error = '';
                if(response.data.error) {
                    error = response.data.error;
                }
                if(status === 401) {
                    $rootScope.unauthorizedLogout();
                } else if(status === 400 && (error === 'token_invalid' || error === 'token_not_provided')) {
                    $rootScope.unauthorizedLogout();
                } 
                return $q.reject(response);
            }
        };
    }]); 

我做过 $ q.defer 它是取消请求的解决方法，但它并没有帮助我在应用程序中实现我想要的功能。

I do tried the $q.defer and it's resolve method to cancel request but it's not helping me to achieve the functionality i want in application.

和平 V

推荐答案

这个答案对我有很大帮助

设置递增超时值以请求

    config.timeout = incrementalTimeout;

处理响应错误的拦截器应如下所示

Your interceptor for handling response error should look like this

   'responseError': function (response) {
    var status = response.status;
    var error = '';
    //functionality to for request aborting and resending
    if (status === -1 || status >= 500) {
        if (attempts <= 3) {
            attempts += 1;
            return retryRequest(response.config);
        }
    } else {
        // set incrementalTiemout and attempts to default value   
        incrementalTimeout = 4000;
        attempts = 1;
    }
    if(response.data.error) {
        error = response.data.error;
    }
    if(status === 401) {
        $rootScope.unauthorizedLogout();
    } else if(status === 400 && (error === 'token_invalid' || error === 'token_not_provided')) {
        $rootScope.unauthorizedLogout();
    }
    return $q.reject(response);
}

在拦截器中重新发送请求的代码

code to resend request in your interceptor

        // default request timeout is of 4 seconds and attempt is 1
        var incrementalTimeout = 4000;
        var attempts = 1;
        function retryRequest (httpConfig) {
            var thisTimeout = incrementalTimeout;
            incrementalTimeout += 1000;
            return $timeout(function() {
                var $http = $injector.get('$http');
                return $http(httpConfig);
            }, thisTimeout);
        }

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