覆盖AngularJS URL验证 [英] Overwriting the AngularJS URL validator

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本文介绍了覆盖AngularJS URL验证的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

AngularJS接受这一个有效的网址:

<?pre> VAR URL_REGEXP = / ^(FTP | HTTP | HTTPS):\\ / \\ /(\\ w +:{0,1} \\ W * @)(\\ S +)(: ?[0-9] +)(\\ / | \\ /([!?!\\ w#+ =放大器;%@ \\ - \\ /]))$ /;

Django的接受这样的:

 正则表达式= re.compile(
    R'^(?:HTTP | FTP)S://'#http://或https://开头
    R'(:(:[A-Z0-9]([A-Z0-9 - ] {0,61} [A-Z0-9])\\)+(?:????[AZ] {2,6} \\ | [A-Z0-9 - ] {2} \\)|。?。?#domain ...
    r'localhost | #localhost ...
    R'\\ D {1,3} \\。\\ D {1,3} \\。\\ D {1,3} \\。\\ D {1,3})'#...或IP
    R'(?:: \\ D +)? #可选端口
    R'(?:?| [/?] / \\ S +)$',re.IGNORECASE)

主要的实际的区别在于AngularJS接受的http://一些主机且不TLD ,而Django的只允许的http://本地主机为无TLD有效的网址

由于它是有问题的覆盖Django的URL验证,我要覆盖AngularJS验证。我尝试了这种方式,其工作方式:

  app.overwriteUrlValidator =功能(ngModel){    // Django的正则表达式,移植到JS。
    VAR URL_REGEXP = /^(?:http|ftp)s?:\\/\\/(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\\.)+(?:[A-Z]{2,6}\\.?|[A-Z0-9-]{2,}\\.?)|localhost|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})(?::\\d+)?(?:\\/?|[\\/?]\\S+)$/gi;    //验证相同的AngularJS的,只是用不同的正则表达式。
    功能urlValidator(值){
        如果(ngModel。$的isEmpty(值)|| URL_REGEXP.test(值)){
            ngModel $ setValidity(URL,真正的)。
            返回值;
        }其他{
            ngModel $ setValidity(网址,假)。
            返回不确定的;
        }
    }    //这是我不满意的部分。我需要使用超时
    //因为我的code角被执行前会将其URL验证。
    //如果我加入我的角度做之前,它不会正常工作?原因。
    window.setTimeout(函数(){
        ngModel $ formatters.push(urlValidator)。
        ngModel $ parsers.push(urlValidator)。
    },100);
};
/ **
 *保持跟踪用户的交互输入字段
 * /
app.inputDirective =功能(){
    功能链接(范围,元素,ATTRS,ngModel){
        如果(ngModel&安培;&安培; attrs.type ===URL){
            app.overwriteUrlValidator(ngModel);
        }
    }    返回{
        限制:'A',
        要求:'?ngModel',
        链接:链接
    };
};
app.directive(输入,app.inputDirective);
app.directive('textarea的',app.inputDirective);

我宁愿不切换到另一个验证指令,因为我不得不更新,并检查了很多code的。

有谁知道这样做的扎实方式?


解决方案

由于角1.3,它现在是相对容易的,你可以完全覆盖现有​​的 $验证

  myApp.directive('输入',函数(){
    功能链接(范围,元素,ATTRS,ngModel){
        功能allowSchemelessUrls(){
            //匹配Django的URL验证,这使得schemeless的URL。
            VAR URL_REGEXP = /^((?:http|ftp)s?:\\/\\/)(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\\.)+(?:[A-Z]{2,6}\\.?|[A-Z0-9-]{2,}\\.?)|localhost|\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})(?::\\d+)?(?:\\/?|[\\/?]\\S+)$/i;            //默默prefixes schemeless网址以http://时,
            //转换期值模型的价值。
            ngModel。$ parsers.unshift(函数(值){
                如果(URL_REGEXP.test(值)及和放大器; URL_REGEXP.test(的http://!+值)){
                    回归的http://+价值;
                }其他{
                    返回值;
                }
            });            ngModel。$ validators.url =功能(值){
                返回ngModel。$的isEmpty(值)|| URL_REGEXP.test(值);
            };
        }        如果(ngModel&安培;&安培; attrs.type ===URL){
            allowSchemelessUrls();
        }
    }    返回{
        要求:'?ngModel',
        链接:链接
    };
});

AngularJS accepts this for a valid URL:

var URL_REGEXP = /^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/;

Django accepts this:

regex = re.compile(
    r'^(?:http|ftp)s?://' # http:// or https://
    r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' #domain...
    r'localhost|' #localhost...
    r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
    r'(?::\d+)?' # optional port
    r'(?:/?|[/?]\S+)$', re.IGNORECASE)

The main practical difference is that AngularJS accepts http://some-host-without-tld, while Django only allows http://localhost as a valid URL without TLD.

Since it's problematic to overwrite the Django URL Validator, I want to overwrite the AngularJS validator. I attempted that this way, which works:

app.overwriteUrlValidator = function(ngModel) {

    // Django RegExp, ported to JS.
    var URL_REGEXP = /^(?:http|ftp)s?:\/\/(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(?::\d+)?(?:\/?|[\/?]\S+)$/gi;

    // Same validator as AngularJS's, only with a different RegExp.
    function urlValidator(value) {
        if (ngModel.$isEmpty(value) || URL_REGEXP.test(value)) {
            ngModel.$setValidity('url', true);
            return value;
        } else {
            ngModel.$setValidity('url', false);
            return undefined;
        }
    }

    // This is the part I'm not happy about. I need to use a timeout
    // because my code is executed before Angular adds its URL validator.
    // If I add mine before Angular does, it will not work for ??? reason.
    window.setTimeout(function() {
        ngModel.$formatters.push(urlValidator);
        ngModel.$parsers.push(urlValidator);
    }, 100);
};


/**
 * Keep track of user's interaction with input fields
 */
app.inputDirective = function() {
    function link(scope, element, attrs, ngModel) {
        if (ngModel && attrs.type === 'url') {
            app.overwriteUrlValidator(ngModel);
        }
    }

    return {
        restrict: 'A',
        require : '?ngModel',
        link    : link
    };
};
app.directive('input', app.inputDirective);
app.directive('textarea', app.inputDirective);

I rather don't switch to another validation directive because I'd have to update and check a lot of code.

Does anyone know a solid way of doing this?

解决方案

As of Angular 1.3, it's relatively easy now that you can completely overwrite existing $validators:

myApp.directive('input', function() {
    function link(scope, element, attrs, ngModel) {
        function allowSchemelessUrls() {
            // Match Django's URL validator, which allows schemeless urls.
            var URL_REGEXP = /^((?:http|ftp)s?:\/\/)(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(?::\d+)?(?:\/?|[\/?]\S+)$/i;

            // Silently prefixes schemeless URLs with 'http://' when 
            // converting a view value to model value.    
            ngModel.$parsers.unshift(function(value) {
                if (!URL_REGEXP.test(value) && URL_REGEXP.test('http://' + value)) {
                    return 'http://' + value;
                } else {
                    return value;
                }
            });

            ngModel.$validators.url = function(value) {
                return ngModel.$isEmpty(value) || URL_REGEXP.test(value);
            };
        }

        if (ngModel && attrs.type === 'url') {
            allowSchemelessUrls();
        }
    }

    return {
        require: '?ngModel',
        link: link
    };
});

这篇关于覆盖AngularJS URL验证的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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