What Causes an Http 405 "Invalid Method (Http Verb)" Error When Posting a Form to PHP on Iis

What causes an HTTP 405 invalid method (HTTP verb) error when POSTing a form to PHP on IIS?

I managed to get FTP access to the customer's server and so was able to track down the problem.

After the form is POSTed, I authenticate the user and then redirect to the main part of the app.

Util::redirect('/apps/content');

The error was occurring not on the posting of the form, but on the redirect immediately following it. For some reason, IIS was continuing to presume the POST method for the redirect, and then objecting to the POST to /apps/content as it's a directory.

The error message never indicated that it was the following page that was generating the error - thanks Microsoft!

The solution was to add a trailing slash:

Util::redirect('/apps/content/');

IIS could then resolve the redirect to a default document as is no longer attempting to POST to a directory.

How to fix 405 - HTTP verb used to access this page is not allowed?

It turns out that in the directory that the website is was a file called "web.config"

When I copied the files of the website, I have accidentally deleted it. This file defined which handler to use for my *.py files. (or any other language files you might use).

Using this: https://community.rackspace.com/products/f/25/t/484 I have added a handler to my IIS and it has solved the problem

IIS 7.5, 405 - HTTP verb used to access this page is not allowed

After trying all other solutions and debugging my service project as a separate virtual host in IIS - I found that my web.config within my service project was inheriting the previous directory's web.config

So, I wrapped my system.web & system.webServer sections with:

<location path="." inheritInChildApplications="false">

So my entire web.config in my root site, looked like this:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<location path="." inheritInChildApplications="false">
...
</location>
</configuration>

HTTP Error 405.0 - Method Not Allowed in IIS Express

I seem to pick up on a bit of frustration in the question, so the actual question is a bit unclear. What specifically is it that you are trying, but failing, to do? What do you expect of the answer?

Anyway, based on this comment in the question:

This is all by way to trying to use HTTP verbs:

and the corresponding samples involving a generic handler, I'll take a stab at showing what is needed to make it possible to PUT and DELETE a generic handler.

In order to allow PUT and DELETE on a generic handler, you must allow it in the web.config of the application. To do that you should register a handler for *.ashx as follows:

<system.webServer>
    <handlers>
        <add name="SimpleHandlerFactory-Integrated-WithPutDelete"
            path="*.ashx"
            verb="GET,HEAD,POST,DEBUG,PUT,DELETE"
            type="System.Web.UI.SimpleHandlerFactory"
            resourceType="Unspecified"
            requireAccess="Script"
            preCondition="integratedMode" />
    </handlers>
</system.webServer>

Depending on how you originally set up the web site/application, there may or may not be a handler registered for type="System.Web.UI.SimpleHandlerFactory" in your web.config file. If there is one, you should be able to just modify that entry and add the verbs you want to allow.

You'll note that this entry has the preCondition="integratedMode". This should, I believe, work when debugging in Visual Studio using IIS Express. In a real IIS deployment, the handler registration may need to be modified to match the application pool that will run the application. For an application running in classic mode (not integrated), it would look something like this (not tested so may be wrong):

<system.webServer>
    <handlers>
        <add name="SimpleHandlerFactory-ISAPI-4.0_64bit-WithPutDelete" 
            path="*.ashx" 
            verb="GET,HEAD,POST,DEBUG,PUT,DELETE" 
            modules="IsapiModule" 
            scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" 
            preCondition="classicMode,runtimeVersionv4.0,bitness64" 
            responseBufferLimit="0" />
    </handlers>
</system.webServer>

The exact details would depend on the framework version an bit-ness of the application pool.

If you are debugging in Visual Studio using IIS Express, you should have a look at the applicationhost.config which sets up a lot of the defaults regarding IIS Express. It is located in:

My Documents\IISExpress\config

The untested handler registration above for a classic pipeline application pool is a slight modification of a handler registration in that file. There are in my environment 6 separate entries for *.ashx, with varying preconditions, in that file.

It might be a good idea to explicitly remove all of these in your web.config if you want to have your own registration which allows PUT and DELETE. Not all of them would actually be active/registered at the same time since the preconditions are (I suppose) mutually exclusive, but at least for me it works to just remove them all, one after the other. In my environment the section with the removes looks like this:

<remove name="SimpleHandlerFactory-ISAPI-4.0_64bit"/>
<remove name="SimpleHandlerFactory-ISAPI-4.0_32bit"/>
<remove name="SimpleHandlerFactory-Integrated-4.0"/>
<remove name="SimpleHandlerFactory-Integrated"/>
<remove name="SimpleHandlerFactory-ISAPI-2.0"/>
<remove name="SimpleHandlerFactory-ISAPI-2.0-64"/>

Hope this shines at least a bit of light into dark places!

Web API Put Request generates an Http 405 Method Not Allowed error

So, I checked Windows Features to make sure I didn't have this thing called WebDAV installed, and it said I didn't. Anyways, I went ahead and placed the following in my web.config (both front end and WebAPI, just to be sure), and it works now. I placed this inside <system.webServer>.

<modules runAllManagedModulesForAllRequests="true">
    <remove name="WebDAVModule"/> <!-- add this -->
</modules>

Additionally, it is often required to add the following to web.config in the handlers. Thanks to Babak

<handlers>
    <remove name="WebDAV" />
    ...
</handlers>

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