javascript - URL Validation for jQuery paste input - Stack Overflow

admin管理员组

文章数量:1291148

I'm trying to determine if a pasted URL is valid. I'm using the bind() function to detect a paste event. I'm using a regex that I found on here for the validation (which works and is fine for the time being). I'm also appending some text to tell the user if it's a valid url or not.

The only thing that isn't working when it's inside the bind() is the URL validation. It works when placed outside of it, though.

JS:

 function validateURL(textval) {
  var urlregex = new RegExp( "^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
  return urlregex.test(textval);
}

$(document).ready(function(){   

    // assign whatever is in the inputbox to a variable
    var url = $("#ent").val()

    //this is if they paste the url from somewhere
    $("#ent").bind('paste', function() {

        if(validateURL(url)) {
            $("#ent").css("background-color","green");
            $("#status").append("Valid URL");
            $("#submit").attr('disabled', 'disabled');
        }
    });

});

HTML:

<input type="text" name="ent" id="ent">
<input type="submit" name="submit" id="submit">
<div id="status"></div>

I'm trying to determine if a pasted URL is valid. I'm using the bind() function to detect a paste event. I'm using a regex that I found on here for the validation (which works and is fine for the time being). I'm also appending some text to tell the user if it's a valid url or not.

The only thing that isn't working when it's inside the bind() is the URL validation. It works when placed outside of it, though.

JS:

 function validateURL(textval) {
  var urlregex = new RegExp( "^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
  return urlregex.test(textval);
}

$(document).ready(function(){   

    // assign whatever is in the inputbox to a variable
    var url = $("#ent").val()

    //this is if they paste the url from somewhere
    $("#ent").bind('paste', function() {

        if(validateURL(url)) {
            $("#ent").css("background-color","green");
            $("#status").append("Valid URL");
            $("#submit").attr('disabled', 'disabled');
        }
    });

});

HTML:

<input type="text" name="ent" id="ent">
<input type="submit" name="submit" id="submit">
<div id="status"></div>

• javascript
• jquery
• validation
• paste

Share Improve this question Follow edited Mar 28, 2011 at 7:56 S L 14.3k1818 gold badges7979 silver badges119119 bronze badges asked Mar 28, 2011 at 7:47 bob_cobbbob_cobb 2,2691111 gold badges5252 silver badges115115 bronze badges 3

• 1 Just a side ment: You can validate the URL by making a request and looking for a 200 OK return code. More reliable than regex. (If its an existing URL) – Elad Lachmi Commented Mar 28, 2011 at 7:50
• @Elad, I'm unfamiliar with this method. I tried to find something on here about it, but couldn't. api.jquery. is currently down for me as well. – bob_cobb Commented Mar 28, 2011 at 8:19
• You can use jquery.ajax to make a call to the URL and check the status code returned. I would give you a refrence, but jquery. is down, as you said. – Elad Lachmi Commented Mar 28, 2011 at 8:38

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 7

you can try this:

$(document).ready(function(){   
     function validateURL(textval) {
  var urlregex = new RegExp( "^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
  return urlregex.test(textval);
}
    // assign whatever is in the inputbox to a variable


    //this is if they paste the url from somewhere
    $("#ent").live('input paste', function() {
        var url = $("#ent").val();
        if(validateURL(url)) {
            $("#ent").css("background-color","green");
            $("#status").append("Valid URL");
            $("#submit").attr('disabled', 'disabled');
        }
    });

});

jsfiddle

Hmm, couldn't you write it slightly different? I'm not sure if the $("#ent") exists on document ready, that could stop the behaviour.

$(document).ready(function(){

    //this is if they paste the url from somewhere
    $("#ent").bind('paste', function() {
        // assign whatever is in the inputbox to a variable
        var that = $(this);
        if(validateURL(that.val())) {
            that.css("background-color","green");
            $("#status").append("Valid URL");
            $("#submit").attr('disabled', 'disabled');
        }
    });
});

user blur event instead.

<script src="jquery.js"></script>
<script>
 function validateURL(textval) {
      var urlregex = new RegExp( "^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&amp;%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&amp;%\$#\=~_\-]+))*$");

  return urlregex.test(textval);
}

$(document).ready(function(){   

    $("#ent").bind('blur',
        function ()
        {
            if(validateURL($(this).val())){
                $('#result').html('Valid url')          
            }
            else{
                $('#result').html('Invalid url')
            }
        }    
    )
    });

</script>
<input type="text" name="ent" id="ent">
<input type="submit" name="submit" id="submit">
<label id="result"></label>
<div id="status"></div>

I am using .change method because .live method not working... code run when you hit enter or tab

$(document).ready(function() {

    function validateURL(textval) {
      var urlregex = new RegExp( "^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
      return urlregex.test(textval);
    }

    $('#myurl').change(function(){
        var url = $("#myurl").val();
        if(!validateURL(url)) {
            $("#status").html("enter Valid URL");
        }
        else {
                $("#status").hide();
        }
    }); //event handler
}); //document.ready

jsfiddle

本文标签： javascriptURL Validation for jQuery paste inputStack Overflow