How to configure the web.config to allow requests of any length

user_981190 0
Viewed 258411

I am building a site in which i would like to create a file client side from the value of a textarea element.

I have the code in place to do this, but i am getting this error

HTTP Error 404.15 - Not Found The request filtering module is configured to deny a request where the query string is too long.

Is there a way to override this so that I am able to process requests of any size?

If not, is there a way to generate files client side without using the filesystem/active x object?

thanks

query-string web-config asp.net-mvc javascript c#
10 Answers

If you run into this issue when running an IIS 8.5 web server you can use the following method.

First, find the "Request Filtering" module in the IIS site you are working on, then double click it...

enter image description here

Next, you need to right click in the white area shown below then click the context menu option called "Edit Feature Settings".

enter image description here

Then the last thing to do is change the "Maximum query string (Bytes)" value from 2048 to something more appropriate such as 5000 for your needs.

enter image description here

user_10397530

It will also generate error when you pass large string in ajax call parameter.

so for that alway use type post in ajax will resolve your issue 100% and no need to set the length in web.config.

// var UserId= array of 1000 userids

$.ajax({
        global: false,
        url: SitePath + "/User/getAussizzMembersData",
        "data": { UserIds: UserId},
        "type": "POST",
        "dataType": "JSON"
}}
user_88979090

For someone who experiences this while running the apps from Visual Studio, while using IIS Express, first you have to locate the applicationhost.config file being used by the application. See the answer at https://stackoverflow.com/a/41553876/1849880 on how to locate the applicationhost.config file. Then, you can change the maxQueryString value as explained above.

user_18498800
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