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In a standard team site, I have a document library that host a static website with html files as well json files loaded asynchronously with javascript.

This was working well in SharePoint 2007. unfortunately, since we migrated to SharePoint 2010, a http GET request on a JSON file fails with:

An error occured while processing resource /foo/bar.json. The page must have a <%@ webservice class="MyNamespace.MyClass" ... %> directive.

This just doesn't make sense. I want the json file to be served as a plain-text resource.

How can I fix this error?

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I translated the error message from French to English myself. Please edit the question if you know how the genuine message. – rds Feb 11 '13 at 10:32
I am facing the same problem, which web.config file I should modify? I just want to modify only for one site not for the whole server. Thanks in advance. Raghu – Raghu Jul 4 '13 at 6:56
up vote 1 down vote accepted

The default web.config contains in <system.webServer><handlers> this handler:

<add name="JSONHandlerFactory" path="*.json" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35" resourceType="Unspecified" preCondition="integratedMode" />

As such, SharePoint thinks that URLs ending with .json are backed up by a web service.

I don't know whether native fonctionnalities rely on such services, hence I don't think it's a good idea to disable this handler. Apparently, Microsoft didn't think that the storage of JSON files in a document library is a valid use case.

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Already added this string in web.config still getting this error. – DOM Feb 3 at 12:14

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