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From MM KP <sbc...@gmail.com>
Subject Re: [users@httpd] Need help with reverse proxying and image loading
Date Mon, 27 Jan 2014 18:45:37 GMT
hello!

Thanks for your response, but is this the same case for a reverse proxy? I
am trying to build a reverse proxy not a forward one.

Thanks though!

any other responses are greatly welcome!

SBC


On Mon, Jan 27, 2014 at 12:57 PM, Mark Brodis <mabrodis@colorado4x4.net>wrote:

> I am a n00b with Apache also but I'll take a stab at this.
>
> What you are wanting is actually 2 things.  A fully functional (for at
> least one website) forward HTTP proxy and also a domain name change.  In my
> opinion you will never get a functional webpage (at least not something as
> complex and interconnected as a CNN site) with static mappings.  Static
> mappings such as mysite.com be translated to cnn.com could work...but as
> you pointed out what about the rest of the items on the CNN page.  There
> will be images from Facebook, Twitter, 4space, Yahoo, Google..and everyone
> of those could have 50 different hosts the images could come from, the
> hostnames that you will pull content from will vary throughout the day and
> your region.
>
> So, for that to work you are going to need to use a real outbound forward
> HTTP proxy which your workstation/browser will know how to use (read up on
> forward proxies versus reverse proxies, same software can be used in very
> different ways).  Now, using that method in theory you could still try to
> change domain names of the site, though I'm not exactly sure how you would
> do that and I don't think it would work right.  Here's why...when a browser
> requests an item from a server it sends the hostname in the HTTP header.
> This seems redundant usually, as the CNN servers know they are CNN so why
> send "cnn" in the header.  This is because the server can serve up
> different content based on the header value (look up virtual hosts, and
> this is not virtual machine stuff).  So while some web-servers will serve
> up the same content whether you request it from the IP or a hostname,
> others will serve up something different.  Also the issue of SSL
> certificates.  The SSL cert has to match the site that the browser is going
> to by name.  SSL certs cannot be tied to an IP address and if you try to
> forward a SSL cert through a domain-name-changed proxy service then the
> name the browser has for a site will not match the CN (common name) value
> in the SSL cert itself..and thus the browser will throw it's arms up,
> complain, warn, etc.
>
> For a normal forward HTTP proxy there is a way to set them up as a secure
> proxy which will handle the SSL certs correctly but that is because there
> is no domain-name changing happening in the process.
>
> So, I'm not sure if what you're trying to do will work for a site as
> complex as CNN.  Could you do a domain-name-change on a buddy's site with
> very little interconnecting..sure..but it would still be a very statically
> defined setup.
>
> Good Luck...
> -Mark
>
>
> On Sun, Jan 26, 2014 at 8:08 PM, MM KP <sbctwc@gmail.com> wrote:
>
>> Hello all
>>
>> I am new to apache & the apache mailing list so PLEASE forgive me for my
>> long message :
>>
>>
>> I am trying to configure a nice reverse proxy using Apache. Basically
>> this is what I want : i want to be able to browse to something like
>> testproxy.myproxy.com and proxy to www.cnn.com. I want to be able to see
>> images and i want javascript and css and all that good  stuff loaded as
>> well. I already created a DNS record for testproxy.myproxy.com and this
>> is the configuration im using for the virtual host:
>>
>>
>> <VirtualHost [::]:80>
>>    ServerName testproxy.myproxy.com
>>    ProxyRequests off
>>    ProxyPass / http://www.cnn.com/
>>    ProxyPassReverse / http://www.cnn.com/
>> </VirtualHost>
>>
>>
>> now when i restart the httpd service (By the way I am using RHEL 6.5), I
>> can browse to testproxy.myproxy.com but allthat appears in the browser
>> are text and links. No images are loaded nor any CSS/javascript. What am I
>> missing in my virtualhost configuration thats preventing me from loading
>> images? Ive noticed that some of the images on cnn.com are hosted on a
>> different site such as :
>>
>> http://i2.cdn.turner.com/cnn/dam/assets/
>>
>> Im guessing that since the images are hosted in the /cnn/dam/assets/
>> folder on i2.cdn.turner.com , and the virtualhost/reverse proxy is only
>> set up to proxy pass to www.cnn.com , it is not loading images and
>> scripts that are hosted on http://i2.cdn.turner.com/cnn/dam/assets/. I
>> dont know if i am even close to being accurate with my assumptions. Apache
>> is a very new thing to me.
>>
>>
>> my question is how do I go about configuring my virtualhosts properly so
>> that every image and script that is on www.cnn.com, will be URL
>> rewritten as testproxy.myproxy.com/ blah blah blah as opposed to
>> i2.cdn.turner.com/etcetcetcetc? for example one of the images on CNN's
>> homepage is:
>>
>>
>> http://i2.cdn.turner.com/cnn/dam/assets/140123154723-07-super-bowl-prep-bin-tease.jpg
>>
>> I want to be able to go to a browser, type in testproxy.myproxy.com in
>> the address bar, proxy to www.cnn.com and when i right click on the
>> image, i want the FQDN of the image to be something like
>> http://testproxy.myproxy.com/images/super-bowl-prep-bin-tease.jpg.
>> Basically i want all URLs to be rewritten as
>> http://testproxy.myproxy.com/.......etc etc etc.
>>
>> All help is GREATLY appreciated because well, i am totally lost here lol.
>> Ive done research on using mod_proxy_html and what not, but im still
>> confused as to how I go about doing this in my situation.
>>
>> Please assist me!
>>
>>
>> Thanks!!
>>
>> SBC
>>
>>
>

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