Access raw JSON from inside asp.net WebMethod
-
30-09-2019 - |
Question
I have a System.Web.Services.WebService
containing several WebMethods
. If any of these WebMethods
raises an exception, I want to log the values passed to that WebMethod. I want to handle this in a way that is generic enough that I can use the same method regardless of the number or type of parameters. I thought I would log the raw JSON but I am unable to determine how to access it. I have searched throughout the Context.Request object (including the InputStream
property) without finding it.
Here is what I would like to do:
[WebMethod(EnableSession = true)]
public IEnumerable MyWebMethod(int a, string b)
{
try
{
//do something
}
catch (Exception e)
{
LogException(e, this.Context);
throw;
}
}
//All WebMethods should be able to call LogExceoption regardless of param type/count
protected void LogException(Exception ex, HttpContext context)
{
string parameters = context.Request. //?? i don't know how to get to the JSON
//write exception detail to log
}
I am using C# with .net Framework 3.5
Solution
Here is how to access the raw JSON:
protected void LogException(Exception ex, HttpContext context)
{
context.Request.InputStream.Position = 0;
string rawJson = null;
using (StreamReader reader = new StreamReader(context.Request.InputStream))
{
rawJson = reader.ReadToEnd();
}
//write exception detail to log
}
OTHER TIPS
See: http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapextension(VS.71).aspx
See TraceExtension, in the example. It handles all web methods and logs the results to a file. Should be straightforward to adapt that to your needs.