HTTP Error 414. The request URL is too long

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I am using ckeditor to format some data inside my textarea

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                <span>2020-12-15 12:01</span>
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<p>In my case, there was a run-time error just before the post call. Fixing it resolved the problem.</p>

<p>The run-time error was trying to read <code>$('#example').val()</code> where <code>$('#example')</code> element does not exist (i.e. <code>undefined</code>).</p>

<p>I'm sure this will, certainly, help someone.</p>
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<p>For me, changing <code>type:"get"</code> to <code>type:"post"</code> worked, as <code>get</code> reveals all queries and hence make it bigger url.<br>
Just change <code>type</code> from <code>get</code> to <code>post</code>.<br>
This should help. :)</p>
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                <span>2020-12-15 12:04</span>
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<p>According to this question the maximum practical length of a URL is 2000 characters. This isn't going to be able to hold a massive Wikipedia article like you're trying to send.</p>

<p>Instead of putting the data on the URL you should be putting it in the body of a POST request.  You need to add a <code>data</code> value to the object you're passing to the ajax function call. Like this:</p>

<pre><code>function editAbout(){

    var about=escape( $("#editorAbout").text());
    $.ajax({
        url: "Allcammand.aspx?cmd=EditAboutCompany&idCompany="+getParam("idCompany"),
        type:"post",
        async: false,
        data: {
            about: about
        },
        success: function(response){                                       
        },
        error:function(xhr, ajaxOptions, thrownError){alert(xhr.responseText); ShowMessage("??? ?? ?????? ??????? ????","fail");}
    });
}
</code></pre>
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                <span>2020-12-15 12:12</span>
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<p>In my case, the error was raised even though I was using 'POST' and the call to the server was successful. It turned to be that I was missing the dataType attribute...strange but now it works</p>

<pre><code>            return $.ajax({
            url: url,
            type: 'POST',
            dataType: 'json',
            data: JSON.stringify(data)
        })
</code></pre>
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