<div dir="ltr"><div><div><div><div><div><div>Thanks for reply.<br><br></div>I tested myself yaws in revproxy and <br></div>I like it.<br><br></div><div>Although I don't know how to capture POST data<br></div><div>which should be present in Arg#arg.clidata field <br></div><div>which is also undefined.<br></div><div><br></div><div>I searched the web and docs and found nothing.<br></div><div><br></div><div>I wrongly assumed that field Arg#arg.querydata hold POST data<br></div><br></div>I want POST data to apply some regular expression checks <br>(like mod_rewrite in Apache) on them <br><br></div>Thanks,<br></div>Bogdan<br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 29, 2015 at 5:49 PM, Steve Vinoski <span dir="ltr"><<a href="mailto:vinoski@ieee.org" target="_blank">vinoski@ieee.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span class="">On Sun, Jun 28, 2015 at 11:20 AM, Bogdan Andu <span dir="ltr"><<a href="mailto:bog495@gmail.com" target="_blank">bog495@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div><div><div><div>Hi,<br><br></div>I know the docs<br></div><span class="">and I run internally Yaws in reverse proxy mode<br></span></div><span class=""><div>and I want this in Internet facing setup also<br></div><div><br></div>I searched the net 'yaws reverse proxy' and I found:<br><br>1) <a href="http://stackoverflow.com/questions/917546/has-anybody-used-yaws-server-as-an-http-proxy" target="_blank">http://stackoverflow.com/questions/917546/has-anybody-used-yaws-server-as-an-http-proxy</a><br></span></div><span class=""> although 6 years old, is Yaws in reverse proxy mode comparable or even<br></span></div><span class=""> better than varnis, haproxy, nginx?<br></span></div></div></div></div></div></div></div></div></div></div></blockquote><div><br></div><div>That question/answer is out of date, since revproxy code was largely refactored in the 2012-2014 timeframe.</div><span class=""><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div>2) <a href="http://osdir.com/ml/web.server.yaws.general/2007-12/msg00000.html" target="_blank">http://osdir.com/ml/web.server.yaws.general/2007-12/msg00000.html</a><br></div> this one is from klacke and he speaks about difficulties he<br></div> encountered writing revproxy <a href="http://engine.as" target="_blank">engine.as</a> well as an OTP limitation<br></div> being the main obstacle in overcoming these. <br></div> Are these still apply today?<br></div></div></div></div></div></div></blockquote><div><br></div></span><div>Probably not, given the rewrite.</div><span class=""><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div>3) also found this: <a href="http://www.erlang-factory.com/upload/presentations/752/reed-efsf2013-whatsapp.pdf" target="_blank">http://www.erlang-factory.com/upload/presentations/752/reed-efsf2013-whatsapp.pdf</a><br></div></div> it seems whatsapp useses or used yaws in revproxy mode with some tweaks<br><br></div>The setup I want is simple:<br><br></div><div>Because I have the applications written in other language<br></div><div>and for rewriting them in Erlang I dont have the time I must <br></div><div>use this setup:<br></div><div><br></div> - Yaws in front-end in revproxy mode with interception module with plenty of check<br></div>on headers, cookies, etc<br><div><div><div><div><div><div><div><div> - Twiggy/Starlet/Starman as back-end or psgi server<br></div><div> more info here: <a href="http://www.slideshare.net/kazeburo/yapc2013psgi-plack" target="_blank">http://www.slideshare.net/kazeburo/yapc2013psgi-plack</a><br><br></div><div> I want to keepalive connections between yaws and psgi servers to avoid<br></div><div> 3-way handshake overhead. Although with outside world I want disable keepalive<br></div><div> and set 'connection: close' and all of thiese can be done by altering the headers<br></div><div> tru interception module.<br><br></div><br><div>Is it safe to keepalive connections between Yaws and Twiggy for<br></div><div>example which is an Libevent implementation web server? <br>Or Starlet/Starman like web server which has a parallel pre-fork model?<br></div></div></div></div></div></div></div></div></div></blockquote><div><br></div></span><div>Seems like it should be OK but I've never used the backend servers you're talking about, so I can't say for sure whether it's safe or not. You might try asking on the erlyaws mailing list (see <a href="https://lists.sourceforge.net/lists/listinfo/erlyaws-list" target="_blank">https://lists.sourceforge.net/lists/listinfo/erlyaws-list</a>).</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>--steve</div></font></span><div><div class="h5"><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div></div><div> <br></div><div>Thanks and sorry for long post,<br><br></div><div>Bogdan<br></div><div><br><div><div><div><div><br><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Jun 28, 2015 at 4:51 AM, Steve Vinoski <span dir="ltr"><<a href="mailto:vinoski@ieee.org" target="_blank">vinoski@ieee.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On Sat, Jun 27, 2015 at 4:58 AM, Bogdan Andu <span dir="ltr"><<a href="mailto:bog495@gmail.com" target="_blank">bog495@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>Hi,<br><br></div>About yaws as reverse proxy..<br><br></div><div>I want to use yaws as a reverse proxy in a<br></div><div>http -> http setup. no ssl involved whatsoever.<br></div><div><br></div><div>I am interested in interception module where I want <br></div><div>to apply various checks on headers, query string, etc<br></div><div>making this some kind of www firewall .<br></div><div><br>Is this feature of yaws production ready ?<br></div></div></div></div></blockquote><div><br></div></span><div>Yes. You can find details about it in chapter 13 of <a href="http://yaws.hyber.org/yaws.pdf" target="_blank">http://yaws.hyber.org/yaws.pdf</a>, or under the revproxy section of <a href="http://yaws.hyber.org/yman.yaws?page=yaws.conf" target="_blank">http://yaws.hyber.org/yman.yaws?page=yaws.conf</a> .</div><span><font color="#888888"><div><br></div><div>--steve</div></font></span><span><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div></div><br><br></div>Thanks,<br></div>Bogdan<br><br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 13, 2015 at 6:14 PM, Steve Vinoski <span dir="ltr"><<a href="mailto:vinoski@ieee.org" target="_blank">vinoski@ieee.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">I don't recall seeing Yaws users asking for this config feature in the past, so it's unlikely we'll add it. But what you're asking for -- a configuration point for methods -- would be implemented much as I've shown in my previous emails, much like a dispatchmod. The dispatchmod is as early in the request handling process as you can get after the formation of the #arg{}. The dispatchmod code I provided requires less configuration than what you're showing, even for the default case, plus if having to have a new module concerns you, the dispatch/1 function can be added to some other existing module you already have instead.<span><font color="#888888"><div><br></div><div>--steve<br><div><div><br></div><div><br></div></div></div></font></span></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 13, 2015 at 4:30 AM, Bogdan Andu <span dir="ltr"><<a href="mailto:bog495@gmail.com" target="_blank">bog495@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div>Yes but the point is to have a default configuration that can be overridden by such a mechanism<br></div>if one is configured.<br></div>The 99 percent of cases only need a default behaviour.<br><br></div>The way I see this is to have something like that (all in one):<br><br></div><LIMIT POST GET><br></div><div> mod_405=my_405_handle_module<br>....<br></div></LIMIT><br><br></div>in this way we can also customize the response if a method other than GET or POST is sent to the server<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 13, 2015 at 10:17 AM, Imants Cekusins <span dir="ltr"><<a href="mailto:imantc@gmail.com" target="_blank">imantc@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><span>> Traffic with methods not allowed should be discarded with 405<br>
<br>
</span>you see, someone else might prefer another action depending on method<br>
not allowed.<br>
<br>
a dedicated attribute may be convenient but then someone would ask:<br>
"how do I change the response code? how do I redirect?". Current<br>
approach gives you choice.<br>
<br>
one of those cases when there is more than one approach, a prefers A,<br>
b prefers B. Both have a valid point.<br>
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