System.Net.WebException Error dispalying while running a WCFRestful Service method using HttpWebResponse

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1.00/5 (1 vote)

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Hi,

I am trying to get a response from a URL using the HttpWebRequest
object. This is my code below:

HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url);
WebResponse myResp = myReq.GetResponse();
Stream stream = myResp.GetResponseStream();
System.Drawing.Image oImg = System.Drawing.Image.FromStream(stream);

here my URL length is 2080 characters and I need to send up to 5000 characters. Is there any solutions for this scenario? Please let me know.

When I'm running the sample console application, I'm getting the following error:
"the remote server returned an error 404 not found at system.net.httpwebrequest.getresponse"

URL:
http://localhost/RestfulService/Service.svc/runPowershell?strQuery=<?xml version='1.0'?><wql host='10.10.10.10'' username='abcd' password='12545'><query id='0.' ><![CDATA[ Get-WmiObject -query 'select CSName from Win32_OperatingSystem']]></query><query id='1.' ><![CDATA[ Get-WmiObject -query 'select Caption from Win32_OperatingSystem ']]></query><query id='2.' ><![CDATA[ Get-WmiObject -query 'select CSDVersion from Win32_OperatingSystem']]></query><query id='3.' ><![CDATA[ Get-WmiObject -query 'select FreePhysicalMemory from Win32_OperatingSystem']]></query><query id='4.' ><![CDATA[ Get-WmiObject -query 'select TotalVisibleMemorySize from Win32_OperatingSystem']]></query><query id='5.' ><![CDATA[ Get-WmiObject -query 'select NumberOfProcesses from Win32_OperatingSystem']]></query><query id='6.' ><![CDATA[ Get-WmiObject -query 'select Size from Win32_DiskDrive']]></query><query id='7.' ><![CDATA[ Get-WmiObject -query 'select LoadPercentage from Win32_Processor']]></query><query id='8.1' ><![CDATA[ Get-WmiObject -query 'select FreePhysicalMemory from Win32_OperatingSystem']]></query><query id='8.2' ><![CDATA[ Get-WmiObject -query 'select TotalVisibleMemorySize from Win32_OperatingSystem']]></query><query id='9.1' ><![CDATA[ Get-WmiObject -query 'select FreeSpace from Win32_LogicalDisk']]></query><query id='9.2' ><![CDATA[ Get-WmiObject -query 'select size from Win32_LogicalDisk']]></query><query id='10.1' ><![CDATA[ Get-WmiObject -query 'select FreeSpace from Win32_LogicalDisk']]></query><query id='10.2' ><![CDATA[ Get-WmiObject -query 'select size from Win32_LogicalDisk']]></query><query id='11.1' ><![CDATA[ Get-WmiObject -query 'select FreeSpace from Win32_LogicalDisk']]></query><query id='11.2' ><![CDATA[ Get-WmiObject -query 'select size from Win32_LogicalDisk']]></query></wql>

URL Lenght: 2371

Posted 15-Feb-11 18:39pm

laxman2jasmi

Updated 5-Dec-19 21:47pm

v5

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Comments

Sandeep Mewara 16-Feb-11 1:48am

I doubt but lets see other responses. URL length is just too much.

Abdul Quader Mamun 16-Feb-11 5:07am

Complex URL. Not Understandable.

2 solutions

Solution 2

XML

Request Filtering is a built-in security feature that was introduced in Internet Information Services (IIS) 7.0, and replaces much of the functionality that was available through the UrlScan add-on for IIS 6.0. All of the settings for the request filtering feature are located within the <requestFiltering> element, which contains several child elements for each of the following feature areas:



1- Go to IIS.
2-Click on "Request Filtering"
3- Right Click and select Edit Feature Settings
4- Adjust Request Limits

Adjust Request Limits is where the limits to length of the request and the lenth of the query string are set.

Posted 21-Nov-14 8:06am

Assil

Updated 23-Nov-14 6:16am

v2

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sjelen · Accepted Answer · 2011-02-17T07:28:00

You have invalid characters in your query string.
On client side you need to escape it before you send request by using
Uri.EscapeUriString(string) or
Uri.EscapeDataString(string)
Both these methods are limited to 32766 characters in input strings.

The limitation could also be on service side.
If your service is hosted in IIS, I think default max query string is about 4KB.

For IIS 7 you can change maximum allowed url and query string length:
appcmd set config /section:requestfiltering /requestlimits.maxurl:<size in bytes>
and
appcmd set config /section:requestfiltering /requestlimits.maxquerystring:<size in bytes>

You can find more details here[^].
You can also use IIS Manager as described here[^]