URI too long error on POST (will not place data in body)

[Derrick Sullivan]

I am attempting to load a large amount of text with a parameter.  The server is responding that it does not see the label. When I post it using standard addparameter, it works with small test strings but with my large block of text I get a URI too long.

What I am reading tells me that this large block should travel in the body, not the URI.

Am I missing something?

[Patrick Steele]

In general, your URI shouldn't be longer than 2000 characters:

http://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url-in-different-browsers

---
Patrick Steele
http://weblogs.asp.net/psteele

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[Rahul Bhansali]

I ran into the same issue. The message Uri is too long completely threw me off since I wasn't expecting my data to travel in the URL at all. After much research I found a resolution to my problem.

Here's what I did. 

- Downloaded the source code from GitHub. 

- Began debugging to identify the point of failure. I traced it down to a part which tries to HTML encode the text using the method Uri.EscapeDataString() 

- The problem is it can only process a string with max length of 65519 characters. See http://stackoverflow.com/questions/6695208/uri-escapedatastring-invalid-uri-the-uri-string-is-too-long

- So in order to resolve this issue: I replaced the default UrlEncode() extension method which used to look like this: 

public static string UrlEncode(this string input)

{ return Uri.EscapeDataString(input); }

to 

public static string UrlEncode(this string input)

{

            int limit = 65519;

            StringBuilder sb = new StringBuilder();

            int loops = input.Length / limit;

            for (int i = 0; i <= loops; i++)

            {

                if (i < loops)

                {

                    sb.Append(Uri.EscapeDataString(input.Substring(limit * i, limit)));

                }

                else

                {

                    sb.Append(Uri.EscapeDataString(input.Substring(limit * i)));

                }

            }

            return sb.ToString();

}

- Rebuilt the solution and copied the new dlls

- Problem resolved :)