Why is IIS stripping web page extensions all of a sudden? - asp.net

This morning I pushed a new .Net web site (fw 4.6.1, previously 4.5.1) out to production. IIS (I assume) stripped the extensions from all web pages (ie. index.aspx just became index). I've had these web sites running for 8+ years using IIS rewrites. It looks like then IIS saw the "extensionless" web pages, the rewrite kicked in and sent it to a non-existent location, producing a 404.
I also did a Windows update 3 days ago (could have missed this issue since but unlikely). The rewrite rule basically says, if you can't find the page, look for the page in the "Clients" subdirectory. The rule looks like:
<rewrite>
<rules>
<rule name="Client Relocation" patternSyntax="Wildcard" stopProcessing="true">
<match url="*" negate="false" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
</conditions>
<action type="Rewrite" url="Clients/{R:0}" />
</rule>
</rules>
</rewrite>
I was able to work around the issue by removing the rewrite rule in a subdirectory:
<rewrite>
<rules>
<remove name="Client Relocation" />
</rules>
</rewrite>
So, it would appear the extension was stripped, then IIS gets the page and thinks it doesn't exist so the rewrite rule takes effect.
So, my question is: who/what is stripping the extension and how can I stop it from doing so?

Lex Li put me on the right track with the comment about the application and failed request tracing. Turned out to be the App_Start/RouteConfig.cs file got modified and added:
var settings = new FriendlyUrlSettings();
settings.AutoRedirectMode = RedirectMode.Permanent;
routes.EnableFriendlyUrls(settings);
Not exactly sure how or why but commenting out the AutoRedirectMode put the extensions back on. If I could give the answer to Lex's comment, I would have.

Related

IIS URL Rewriting and MVC

My hosting plan has a limited number of web applications for use, but unlimited subdomains. I plan to take advantage of these subdomains by using IIS rewriting, like the following:
<rule name="Home Rewrite" enabled="true">
<match url="^(.*)$" />
<conditions>
<add input="{HTTP_HOST}" pattern="^home\.mydomain\.com$" />
</conditions>
<action type="Rewrite" url="home/{R:1}" />
</rule>
This works fine for the most part, I can go to http://home.mydomain.com and it'll take me to what is essentially http://www.mydomain.com/home as expected.
I am publishing using Web Deploy, and I believe the host is IIS7.
The problem is that I want to take advantage of #Html.ActionLink, but when viewing the source, this resolves out to include the virtual directory.
So what I end up with is a site that works when I go to the original address:
http://www.mydomain.com/home/application
And a site that loads, but doesn't function correctly, at the redirected address:
http://home.mydomain.com/application
With generated URLs in the page source pointing relative to the original address:
/home/application/Account/Login
This applies to links to other pages/routes, bundles, basically anywhere that ~/ or #Html.ActionLink is used.
How do I get around this? I'm hoping to keep the use of #Html.ActionLink at least, I think I can live without the tildes.
I finally found a solution!
https://support.gearhost.com/entries/23689272-URL-Rewrite-Subdomain
My web.config rewrite rule required an extra line:
<rule name="Home Rewrite" enabled="true">
<match url="^(.*)$" />
<conditions>
<add input="{HTTP_HOST}" pattern="^home\.mydomain\.com$" />
<add input="{PATH_INFO}" pattern="^/home/" negate="true" /> <!-- This one! -->
</conditions>
<action type="Rewrite" url="home/{R:1}" />
</rule>
Now everyone is happy :)
You could write a custom HtmlHelper so instead of using ActionLink you can use MyActionLink and it can generate the url you need.

IIS Rewrite not working (but redirection does)

I was trying to play with URL re-writing using the Rewrite Module 2.0 but I had no luck getting it to work. What I'm trying to do is re-write all calls to web app at port 80 to other applications hosted in IIS (or maybe on different servers on the network). Using the GUI provided by IIS I created the following rule:
<rewrite>
<rules>
<rule name="ReverseProxyInboundRule1" stopProcessing="true">
<match url="site1/(.*)" />
<action type="Rewrite" url="http://localhost:7001/{R:1}" />
</rule>
</rules>
</rewrite>
Quiet simple, but unfortunately it does not work. On the other hand, when I change the action type to Redirect, it works fine.
What could be the problem?
I ran into this same issue yesterday, and it took me a long time to figure out.
The key here is that you've got an http:// prefix in your rewrite action; that makes this a special case that needs to be handled by Application Request Routing. The first step is to make sure that the Application Request Routing module is installed. You can find the module at https://www.iis.net/downloads/microsoft/application-request-routing. Once that is installed, go to your IIS web server (a level up from your web site), and open the Application Request Routing Cache feature. From the actions on the right, choose Server.Proxy.Settings, and make sure that the "Enable Proxy" checkbox is checked. This allows the URL rewrite task to be re-routed to Application Request Routing, and your reverse proxy should work for external requests.
The idea came from this excellent blog post from 2009: http://ruslany.net/2009/04/10-url-rewriting-tips-and-tricks/
Stumbled across this old post when I was trying to solve the same issue.
SOLVED!
Using Rewrite URL feature in IIS Services Manager I created a friendly URL rule.
This worked ok and when I looked at the rule in the web.config file (www root) it showed 1 rule to redirect and 1 rule to rewrite.
I edited this to suit 1 match. Then I just duplicated this code editing the product ID for each. Example below:
<rule name="RedirectUserFriendlyURL1" stopProcessing="true">
<match url="^product\.php$" />
<conditions>
<add input="{REQUEST_METHOD}" pattern="^POST$" negate="true" />
<add input="{QUERY_STRING}" pattern="^id_product=\b35\b" />
</conditions>
<action type="Redirect" url="990mm-bohemia-cast-iron-electric-radiator"
appendQueryString="false" />
</rule>
The first rule looks for the string "product.php" in the URL and "id_product=35", it then redirects to "990mm-bohemia-cast-iron-electric-radiator" which currently does not exist. Then (see below)
<rule name="RewriteUserFriendlyURL1" stopProcessing="true">
<match url="^\b990mm-bohemia-cast-iron-electric-radiator\b" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
</conditions>
<action type="Rewrite" url="product.php?id_product=35" />
</rule>
This rule rewrites the "product.php?id_product=35" bit to `990mm-bohemia-cast-iron-electric-radiator", creating the new location for the redirect.
Do make sure MVC routing doesn't steal your request. To prevent that from happening, ignore the route you're trying to rewrite:
RouteTable.Routes.Ignore("blog/{*pathInfo}");
Inspired by: https://sitecore.stackexchange.com/questions/3645/how-to-setup-a-reverse-proxy-with-sitecore
Change the Rewrite URL to AbsolutePath instead putting http://...
it should be
<action type="Rewrite" url="{R:1}" />
It worked for me, but in my case, I have been rewrite to a fixed webpage.

IIS Forces Slash even with URL Rewrite to remove it

I am unable to remove the trailing slash my site's URLs even with the URL rewrite from: http://ruslany.net/2009/04/10-url-rewriting-tips-and-tricks/.
Frustrating really since it should be so simple but my attempts have not produced any results.
I even went as far as to create a test directory and added file called desktops.aspx and and sub folder called desktops.
without the sub directory "/test/desktops" loads fine since i set the default document to look at desktops.aspx.
with a subfolder created and still referencing "/test/desktops" it forces the slash and looks at the sub directory.
Why does IIS does this since its supposed to look for the file first then the sub directory correct? Are there any settings on the server side that would force back the slash?
URL Rewrite Snippet:
<rule name="SEO - Remove trailing slash" stopProcessing="false">
<match url="(.+)/$" />
<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
<add input="{HTTP_METHOD}" pattern="GET" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
</conditions>
<action type="Rewrite" url="_{R:1}" />
</rule>
any help would be welcome
You are using an action of type Rewrite but you want a Redirect.
Change your configuration to:
<rule name="SEO - Remove trailing slash" stopProcessing="false">
<match url="(.*)/$" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
</conditions>
<action type="Redirect" url="{R:1}" />
</rule>
You also need to change url="(.+)/$" to url="(.*)/$".
TIP:
The best way to test your pattern is to use the IIS test pattern tool.
At the root of your website -> URL Rewrite -> Create a blank rule -> click on test pattern:
I was having this same problem and here is what I found.
My intent was to use this rule on an MVC website but I didnt want to test in production so I tested the rule on a site already setup which happened to be web forms asp.net.
I encountered the same problem as you. Navigating to www.example.com/test redirected to www.example.com/test/ even with the rule in place.
So I noticed the conditions to check if the requested url is a file or directory and I removed them.
Now going to www.example.com/test/ redirected to www.example.com/test. Yay! No. IIS automatically added another redirect back to www.example.com/test/ resulting in a redirect loop. Boo.
I then found this article https://support.microsoft.com/en-us/kb/298408 which relates to IIS 6 but is obviously still an issue.
So because I am in an asp.net web forms site, in my case /test is a physical directory and there is something in IIS that forces the trailing slash for directories. And sorry to say but I couldn't find a way to easily turn it off.
However! My requirement was for MVC and configured routes that are NOT directories. So I tried it again on a MVC website and the redirect to remove the trailing slash worked perfectly.
The rule I ended up with is:
<rule name="RemoveDatSlash" stopProcessing="true">
<match url="(.*)/$" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
</conditions>
<action type="Redirect" redirectType="Permanent" url="{R:1}" />
</rule>
Hope this helps!
The problem I had were links to PDF files having trailing forward slashes, so what worked for me in Windows Server 2008 R2 running IIS 6.1:
Click on the website that needs the rule and in the Features view open up URL Rewrite and then on the Actions section (right pane) choose Add Rule(s) and select Append or Remove the trailing slash symbol. In the next window on the drop down choose remove if exists.
Hope this helps.

MVC3 + WordPress IIS Url Rewriting Rules

I have a ASP.NET MVC3 website located at http://mydomain.com/mymvcapp/. However, the root of the webiste (mydomain.com) contains a WordPress site running PHP. Therefore, I put the following IIS URL Rewrite rule to allow WordPress to function correctly via its rewriting mechanisms:
<rewrite>
<rules>
<rule name="wordpress" patternSyntax="Wildcard">
<match url="*" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
</conditions>
<action type="Rewrite" url="index.php"/>
</rule>
</rules>
</rewrite>
So with this rule in place my WordPress functions perfectly, however, my MVC rewriting does NOT work. How would I alter this rule to allow both WordPress and MVC (under the /mymvcapp/ folder) to coexist nicely?
Figured it out on my own. Regex is probably one of the most powerful YET complicated / confusing technologies there is. But in this case the patternSyntax flag was set to Wildcard, not Regex, which caused my confusion. Hope this helps someone else out there! =]
<rewrite>
<rules>
<rule name="wordpress" patternSyntax="Wildcard">
<match url="*" />
<conditions logicalGrouping="MatchAll">
<add input="{PATH_INFO}" pattern="/mymvcapp/*" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
</conditions>
<action type="Rewrite" url="index.php" />
</rule>
</rules>
</rewrite>
This is one of the very few posts anywhere that talks about making WordPress and ASP.NET coexist nicely in an IIS setup. So Kudos for that.
I was thinking to post this as comment to either your original question or the answer, but I chose to write an "answer" only because this is an honest question and I need some formatting capabilities.
I have multiple ASP.NET apps running on by site. In particular the root website is running an MVC4 app.
Since I cannot have WordPress installed at the root, my plan was to have it on its own app folder http://mydomain.com/wordpress/ and then have a URL-rewrite rule that to do the following (using peudo-code):
blog.mydomain.com/{path} --> mydomain.com/wordpress/{path}
I've only caused a mess with this approach and have not been successful using pretty permalinks, sometimes getting into redirect-loops and other times breaking links to .css files, admin pages, etc...
Have you ever given this a thought, i.e., having wordpress as a subapp instead and do sub-domain URL-rewriting?!?!
I had a similar situation but I had no need to edit my web.config file. Instead I followed instructions here at https://wordpress.org/support/article/giving-wordpress-its-own-directory/ where this is documented.
At point 7) within Moving WordPress process to a subfolder Method II (With URL change) you find options for a IIS installation.

ASP.NET / IIS7 Url Rewrite maps not working

I've followed the instructions Learn IIS's webpage for adding static redirects with a rewrite map for my asp.net application.
The following is the config:
<rule name="Redirect rule1 for Information" stopProcessing="true">
<match url=".*" />
<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
<add input="{Information:{REQUEST_URI}}" pattern="(.+)" />
</conditions>
<action type="Rewrite" url="{C:1}" appendQueryString="true" />
</rule>
And
<rewriteMaps>
<rewriteMap name="Information">
<add key="/Information/CorporateSales.aspx"
value="/KB/Information/CorporateSales" />
<add key="/Information/ComputerRepair.aspx"
value="/KB/Information/ComputerRepair" />
</rewriteMap>
</rewriteMaps>
This was even originally created by the wizard in IIS's manager for using rewrite maps.
So the idea is that /Information/CorporateSales.aspx --> /KB/Information/CorporateSales with a 301 redirect (MOVED PERMANENTLY).
However I'm just getting the original aspx page (Which we're removing later) loading. I've even deleted the file incase it was defaulting to an existing resource, and with that i just get a plain 404 without the redirect.
Anyone have an idea?
Let me clarify something:
Rewrite module works, it's installed and running. My standard regex rules work nicely. But my rewrite map does not.
This article http://www.iis.net/learn/extensions/url-rewrite-module/using-rewrite-maps-in-url-rewrite-module and code below worked for me.
<rewrite>
<rules>
<rule name="Redirect rule1 for RedirectURLs">
<match url=".*" />
<conditions>
<add input="{RedirectURLs:{REQUEST_URI}}" pattern="(.+)" />
</conditions>
<action type="Redirect" url="{C:1}" appendQueryString="false" />
</rule>
</rules>
<rewriteMaps>
<rewriteMap name="RedirectURLs">
<add key="/privacy.php" value="/privacy" />
</rewriteMap>
</rewriteMaps>
</rewrite>
I was having a similar problem and found this question. It took me a little while, but I was able to figure out what the problem was.
My rewriteMap contained the urls "/Default2.aspx" and "/Dashboard.aspx".
When I would go to Default2.aspx, I would get a 404 rather than get redirected to Dashboard.aspx as expected.
The issue I found was that on my machine, the application was running in a subdirectory. The rewriteMap paths would only work if I used the full path (including the application folder), e.g., "/TestSite/Default2.aspx".
So I could have added duplicate entries in my rewriteMap to account for application directories on developer machines, but that seemed messy. I looked at the other rewrite rules in the application that did not have this issue and I noticed that they were using the {REQUEST_FILENAME} variable, rather than {REQUEST_URI}. So I switched the rule to use {REQUEST_FILENAME} and remove the first slash from the urls in my rewriteMap.
Do you have Url rewriting installed as part of IIS7/7.5? This is not installed by default. Also, make sure your app pool is set to integrated pipline mode, no classic.
Edit
From this:
http://learn.iis.net/page.aspx/469/using-rewrite-maps-in-url-rewrite-module/
This only thing I see that you're doing is adding the 'stopProcessing' attribute. Have you tried removing that?
Previously I had same problem as you described.
Could you update your code to
<match url="(.*)" />
and I hope you aware,
<add input="{Information:{REQUEST_URI}}" pattern="(.+)" />
this condition will capture full URL except the domain.
example on this url:
www.example.com/Information/CorporateSales.aspx
it will check matching condition of
Information/CorporateSales.aspx on rewriteMap
and for sure it wont be match with this url
www.example.com/old/Information/CorporateSales.aspx
Did you reset the app pool and the iis site ?
In some cases it can take up to 72 hours (iirc) to propagate throughout the world.

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