Rewrite to other server - apache

Question

I have application hosted in tomcat under port 8050; mydomain:8050. Now, I want to have friendly url, say mydomain.com to be used to access mydomain:8050 without the client seeing the port number in the URL. Client should always see mydomain.com that should be internally resolved to mydomain:8050.
I have IIS server running on port 80. I created a site in it just to use rewrite option that can resolve to mydomain:8050. It didn't work with the pattern I used
Pattern: ((?:[^\/\n]|\/\/)+)(.*)
Rewrite URL: {R:1}:8050{R:2}
Then I installed apache http server on port 90. Used redirection in IIS site to redirect the URL to mydomain:90$S$Q and then used rewrite in Apache to internally redirect it to mydomain:8050. This works when I have a query string in it, like mydomain.com/queryString, but doesn't work if I type just mydomain.com. I can see it redirecting to mydomain:90 and stops there without any rewrite rules being executed. This also changes the URL to mydomain:90 and is visible to client.
My requirement is that when user enters mydomain.com it should internally resolve to mydomain:8050 (with query string if any) without client seeing it. I have IIS running at port 80 and apache running on port 90. How can I achieve this? I am sure this can be handled in rewrite rule of IIS, but I am not sure how to do that.

Answer 1

Rewriting to another server is basically proxying. What we need is a
reverse proxy setup in IIS which basically proxy all your requests
from http://example.com to to http://example:8050/(or better
http://localhost:8050)
Make sure you have ARR module installed on IIS
Create a reverse proxy rule like this
<rule name="ReverseProxyInboundRule1" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{CACHE_URL}" pattern="^(https?)://" />
</conditions>
<action type="Rewrite" url="{C:1}://mydomain:8050/{R:1}" />
</rule>
Please note that since both Apcahe and IIS are in the same server,you can use localhost:8050 as backend proxy.
EDIT:
Also if you have any redirect coming back from the backend proxy and you do not want to redirect the Location header coming ,You can do that by unchecking "Reverse rewritehost in response headers" in Application Request Routing
Select the server node in IIS manager
Go to Application Request routing Cache
Click on Server proxy Settings
UnCheck "Reverse rewritehost in response headers"