如何扩展 jquery.validate URL 验证？

Question

我需要用户能够创建部分 URL，而无需每次都输入完整的 URL。

例如，假设我计划将 url 设为www.example.com/areas/{userinput}/home。我希望用户能够在文本框中输入一些文本，并且我想验证它是一个有效的 URL。

网址验证器功能如下：

url: function(value, element) {
        return this.optional(element) || /giantregex/.test(value);
}

我尝试通过以下方式向验证器添加验证方法：

$.validator.addMethod("exturl", function(value) {
    return $.validator.methods.url.call($.validator, "http://www.example.com/areas/" + value + "/home");
});

但是，当验证表单并调用我的扩展时，我不断收到此错误：

Uncaught TypeError: Object function (d,a){this.settings=b.extend(true,{},b.validator.defaults,d);this.currentForm=a;this.init()} has no method 'optional' 

optional 看起来是 $.validator 对象上的一个方法，但我不知道如何调用验证器 url 方法。

Answer 1

jQuery 验证插件 - v1.11.0

jQuery.validator.addMethod("complete_url", function(val, elem) {
    // if no url, don't do anything
    if (val.length == 0) { return true; }

    // if user has not entered http:// https:// or ftp:// assume they mean http://
    if(!/^(https?|ftp):\/\//i.test(val)) {
        val = 'http://'+val; // set both the value
        $(elem).val(val); // also update the form element
    }
    // now check if valid url
    // http://docs.jquery.com/Plugins/Validation/Methods/url
    // contributed by Scott Gonzalez: http://projects.scottsplayground.com/iri/
    return /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(val);
});

然后：

$("#form1").validate({
    rules: {
        complete_url:true
    }
});

来自http://www.robsearles.com/2010/05/jquery-validate-url-adding-http/

Answer 2

我设法让它没有错误地工作，这是我使用的 JS 代码：

$(document).ready(function(){

    function validateURL(value){
      // URL validation from http://stackoverflow.com/questions/3809401/what-is-a-good-regular-expression-to-match-a-url
      var expression = /[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?/gi;
      var regex = new RegExp(expression);
      return value.match(regex);
    }

    $.validator.addMethod("urlvalidation", function(value, element) {
      return this.optional(element) || validateURL(value);
    }, "URL is not valid");

    $('#frm_validation').validate({
      rules : {
          urlvalidation : { urlvalidation : true }
      }
    });  

});​

您可以在 this JSFiddle 上看到它的实际效果。