Re: Proxy adding headers
On Mon, 27 Nov 2000, Sander van Zoest wrote:
Unfortunately, it seems that when I proxy I get the above added so I have
to serve streaming audio directly from the mod_perl server, which is less
than ideal in terms of resource use.
If you mena you rewrite to mod_proxy, then mod_proxy does not fill
headers{in} it simply ships what it gets from the remote server with the
content and ships that. You would need to hack mod_proxy for it parse
the headers and provide them to you in the normal request_rec structures.
I have don't this before, but do not have rights to the code to post the
patch, sorry. :-(
Actually, something is _adding_ headers and I want it to stop doing it.
It may not be mod_proxy, perhaps it is mod_rewrite. I really don't know.
-dave
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Re: Proxy adding headers
On Mon, 27 Nov 2000, Dave Rolsky wrote: Actually, something is _adding_ headers and I want it to stop doing it. It may not be mod_proxy, perhaps it is mod_rewrite. I really don't know. Normally the mod_proxy code doesn't touch the headers, it simply sends the headers on from the remote server you are proxying too. I doubt it is mod_rewrite but it could be. The extra headers are probably coming from your remote server you are proxying to. -- Sander van Zoest [[EMAIL PROTECTED]] Covalent Technologies, Inc. http://www.covalent.net/ (415) 536-5218 http://www.vanzoest.com/sander/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
On Mon, 27 Nov 2000, Sander van Zoest wrote: Normally the mod_proxy code doesn't touch the headers, it simply sends the headers on from the remote server you are proxying too. I doubt it is mod_rewrite but it could be. The extra headers are probably coming from your remote server you are proxying to. I don't think so. If I do a telnet to the proxy server (port 80, no mod_perl) I get the extra headers. If I telnet to the mod_perl enabled server (port 12345), I get what I want (no extra headers). -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] Re: Proxy adding headers
On Mon, 27 Nov 2000, Dave Rolsky wrote: On Mon, 27 Nov 2000, Sander van Zoest wrote: Normally the mod_proxy code doesn't touch the headers, it simply sends the headers on from the remote server you are proxying too. I doubt it is mod_rewrite but it could be. The extra headers are probably coming from your remote server you are proxying to. I don't think so. If I do a telnet to the proxy server (port 80, no mod_perl) I get the extra headers. If I telnet to the mod_perl enabled server (port 12345), I get what I want (no extra headers). Ah, are you trying to send ICY headers or something? mod_proxy only knows of HTTP and sends the appropriate status itself rather then what it gets from the remote server. This will also require some hacks in mod_proxy to make it aware of the protocol you are trying to proxy. Cheers, -- Sander van Zoest [[EMAIL PROTECTED]] Covalent Technologies, Inc. http://www.covalent.net/ (415) 536-5218 http://www.vanzoest.com/sander/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Re: Proxy adding headers
On Mon, 27 Nov 2000, Sander van Zoest wrote: Ah, are you trying to send ICY headers or something? mod_proxy only knows of HTTP and sends the appropriate status itself rather then what it gets from the remote server. This will also require some hacks in mod_proxy to make it aware of the protocol you are trying to proxy. That is the exact problem. Ok, the chances of me hacking mod_proxy are next to nil. At least now I know what I can't do to fix the problem though ;) -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
Dave Rolsky [EMAIL PROTECTED] writes: On Mon, 27 Nov 2000, Sander van Zoest wrote: Normally the mod_proxy code doesn't touch the headers, it simply sends the headers on from the remote server you are proxying too. I doubt it is mod_rewrite but it could be. The extra headers are probably coming from your remote server you are proxying to. I don't think so. If I do a telnet to the proxy server (port 80, no mod_perl) I get the extra headers. If I telnet to the mod_perl enabled server (port 12345), I get what I want (no extra headers). Technically mod_proxy doesn't generate headers (here I'm taking the simple case of a non-cacheing http request). After stripping the connection header, it simply passes the headers it got from the backend server right on along to r-connection via ap_proxy_send_hdr_line (or ap_proxy_send_headers for cached files IIRC). Moreover if your backend server calls ap_send_http_header during its response, it *must* return a Server and Date field unless your request is assbackwards. See the src for ap_basic_http_header in src/main/http_protocol.c. mod_proxy will upgrade assbackwards requests to HTTP/1.0 before passing them along to the backend server, which may explain why the date field shows up in your telnet experiments. Why not post the full output of your telnet sessions so we can see what is really going on? HTH. -- Joe Schaefer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
On 27 Nov 2000, Joe Schaefer wrote: mod_proxy will upgrade assbackwards requests to HTTP/1.0 before passing them along to the backend server, which may explain why the date field shows up in your telnet experiments. Why not post the full output of your telnet sessions so we can see what is really going on? Actually, this totally explains the problem, as did Sander's previous post. I'm attempting to use Apache as a non-HTTP server (sending ICY headers for streaming MP3 instead). So yes, its an assbackwards request and its upgrading it. Which is annoying. It would be nice if this were configurable in mod_proxy.c. Maybe I will have to look at the code. But I'm afraid of C. -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
Dave Rolsky [EMAIL PROTECTED] writes: I'm afraid of C. Don't be. (perl is C with cream and sugar added ;) Grab a copy of Kernighan and Ritchie's _The C Programming Language_ (it's authoritative, and all of 274 pages cover to cover). Then start monkeying around in src/modules/proxy/proxy_http.c and/or src/main/http.protocol.c and see what you can cook up. Tweaking and/or commenting out a few lines should do the trick. Just be sure to back up your apache tree before you start tinkering. Best. -- Joe Schaefer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Re: Proxy adding headers
On Mon, 27 Nov 2000, Sander van Zoest wrote: Ah, are you trying to send ICY headers or something? mod_proxy only knows of HTTP and sends the appropriate status itself rather then what it gets from the remote server. This will also require some hacks in mod_proxy to make it aware of the protocol you are trying to proxy. Well, I guess C is easier than I thought. I got it working via a new config directive for mod_proxy, ProxyAddHeaders. By default its true and this means that mod_proxy will add minimal headers for wack responses from the proxy server (like HTTP 0.9 or ICY or whatever). However, if you turn it off it will _not_ add these headers. There is a bug in the current state of the code in that if the caching code is called, it will add a Date header if none exists. I'm currently working around this by turning off caching. I'm going to see if there is interest in the Apache core team in having this submitted as a patch. Is so, I'll work around the remaining bug. In the meantime, if anybody on this list is interested I can send you my current patch, which is against 1.3.12. Its not many lines so porting it to a different Apache version should be trivial. -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
Dave's company could also *pay* someone to do what he wants. It would probably take about a day of someone at Covalent (probably less) to whip something up to stop doing the headers (and they would probably be able to feed the change back into the mod_proxy part of the Apache CVS directly so others would benefit). At 10:10 PM 11/27/2000 -0500, Joe Schaefer wrote: Dave Rolsky [EMAIL PROTECTED] writes: I'm afraid of C. Don't be. (perl is C with cream and sugar added ;) Grab a copy of Kernighan and Ritchie's _The C Programming Language_ (it's authoritative, and all of 274 pages cover to cover). Then start monkeying around in src/modules/proxy/proxy_http.c and/or src/main/http.protocol.c and see what you can cook up. Tweaking and/or commenting out a few lines should do the trick. Just be sure to back up your apache tree before you start tinkering. Best. -- Joe Schaefer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Gunther Birznieks ([EMAIL PROTECTED]) eXtropia - The Web Technology Company http://www.extropia.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Proxy adding headers
On Tue, 28 Nov 2000, Gunther Birznieks wrote: Dave's company could also *pay* someone to do what he wants. It would probably take about a day of someone at Covalent (probably less) to whip something up to stop doing the headers (and they would probably be able to feed the change back into the mod_proxy part of the Apache CVS directly so others would benefit). Great, as soon as I can find a company willing to fund my work on a personal MP3 server I'll be all set ;) Actually, I already did most of the patch and I sent a message to the new-httpd list to discuss the possibility of making this a part of a future release. Of course, if someone at Covalent wants to help that's great too. And for the record, it took a lot less than a day. About 1.5-2 hours, I'd say. -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Proxy adding headers
This sort of a mod_perl question. When I use mod_rewrite to proxy to my mod_perl backend servers, it seems that even if I explicitly don't send headers I still get something like: HTTP/1.0 OK Date: blah bah in front of anything I said. The issue here is that I wrote some MP3 serving code based on Lincoln Stein's Apache::MP3 module. To send streaming mp3 data to a client like Winamp or XMMS, I need to be able to have absolute control over the headers that are generated. Unfortunately, it seems that when I proxy I get the above added so I have to serve streaming audio directly from the mod_perl server, which is less than ideal in terms of resource use. Any ideas? -dave /*== www.urth.org We await the New Sun ==*/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
