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Re: dpid
by Jorge Arellano Cid Dec. 9, 2003

Dec. 9, 2003

On Sat, 6 Dec 2003, Ferdi Franceschini wrote: > Hi Jorge, > > On Fri, Dec 05, 2003 at 09:25:20AM -0300, Jorge Arellano Cid wrote: > > > > Hi Ferdi, > > > > I've catched an API problem inside the capi/cache that may be > > the cause for the fork-hog. This note is just to keep you from > > wasting time reviewing it. I'll write to you soon. > Great. It _was_ the cause! There was a race condition hidden behind the lack of dpi-cache connection (the part we blamed) and a slightly broken API (the cloaked problem). As a matter of fact this bug had remained unnoticed maybe for years. In my patched tree (which is under test), the bug is fixed (both parts) and dillo works even better than before. > I think I have a new solution to the inf loop caused when a connection is not > accepted on a dpi socket for any reason. This new solution does not require > any code changes to the plugins. I will post more info to dillo-dev but I need > to experiment a bit first. That's good news. Cheers Jorge.-

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dead link behavior
by Peter Milne Dec. 5, 2003

Dec. 5, 2003

Greetings all, Was wondering if it is me or if it was normal. If I click a link and it turns out to be a dead link.....everything locks up hard and I have to 'xkill' Dillo. Thanks, -- ~~~Pete~~~ http://milneweb.com http://nomorevirus.com

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Re: [Dillo-dev] dead link behavior
by Jorge Arellano Cid Dec. 5, 2003

Dec. 5, 2003

On Thu, 4 Dec 2003, Peter Milne wrote: > > This is what Jorge Arellano Cid wrote prior to this response: > > > > >> > >> If I click a link and it turns out to be a dead link.....everything > >> locks > >> up hard and I have to 'xkill' Dillo. > > > > Definitely not normal. Anyway to reproduce it? [snip] > Sure thing, let me click on a dead link. Example: > > (Thu 13:44) happy %dillo > Setting locale to C... > dillo_dns_init: Here we go! > Enabling cookies as from cookiesrc... > Nav_open_url: Url=>about:splash< > Nav_open_url: Url=>http://www2.bsdhound.org< > Dns_server [0]: www2.bsdhound.org is 0x814fe78 > Connecting to 12.*.*.* > > > And there it hangs...... Doesn't happen here. Are you using 0.7.3 or CVS? With IPv6 or default? Has anyone seen this bug? Cheers Jorge.-

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Frames
by Peter Milne Dec. 5, 2003

Dec. 5, 2003

Tell me, if I recall, there is a way to view frames in Dillo...correct? Would love to use it for Squirrelmail. Would actually be willing to use another web based, imap mail client too. -- ~~~Pete~~~ http://milneweb.com http://nomorevirus.com

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Re: [Dillo-dev] gcc 2.95 doesn't know about -Wno-unused-parameter
by Jorge Arellano Cid Dec. 5, 2003

Dec. 5, 2003

On Wed, 3 Dec 2003, David McKee wrote: > On Tue, 2 Dec 2003, David McKee wrote: > > On Tue, 2 Dec 2003, Jorge Arellano Cid wrote: > > > On Tue, 25 Nov 2003, Andreas Schweitzer wrote: > > [attribution to me lost] > > > > > my gcc doesn't believe in -Wno-unused-parameters, > > [snip] > > > > Attached is a patch > > [snip] > > > Commited. > > > Does it work for you David? > > > Perfectly. Thanks. > > Having said that on the basis of my gcc 2.95 based debian machine at home, > I tried it on my work machine. > > The Redhat box actual uses: > > $ gcc -v > Reading specs from > /usr/lib/gcc-lib/i386-redhat-linux/egcs-2.91.66/specs > gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) > > *sigh* > [...] > Style question: > > Would it be better to test for the presence of the flag than to try to > exclude those compilers without it? Yes, that's the right way to do it, but I don't know how yet :) I commited a patch that tests for gcc version 3. Please test it and tell us. Cheers Jorge.-

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Re: dpid
by Jorge Arellano Cid Dec. 4, 2003

Dec. 4, 2003

[we've had this thread for a long time outside dillo-dev, it has some interesting information so I'm switching to dillo-dev] Ferdi, On Thu, 4 Dec 2003, Ferdi Franceschini wrote: > Hi Jorge, > > On Tue, Dec 02, 2003 at 09:03:08AM -0300, Jorge Arellano Cid wrote: > > > > Hi Ferdi, > > > > > > [...] > > > > Unfortunately the dpid is showing some problems with some https > > > > urls (also with some ftp ones). It sometimes ends in a loop of > > > > endless forking of dpi programs. > > > The https dpi appears to be implemented as a filter type plugin but it is installed as > > > https.dpi and not https.filter.dpi. > > > > Oh! > Does https work now? It does partly! (with the dpi-cache patch I'm developing). I'm planning to develop https.dpi as a dpi server so it can directly link against SSL lib or GNU TLS, instead of using wget. This ends the forking and allows for an easy implemetation of connection caching. BTW, https pages render OK with my tree, it's just the lack of reuse of the same connection what I suspect keeps it from working fully. I need to test a bit more too. Note: is there anybody here interested in working on the https dpi. I can quickly make the base (dpi server instead of filter) and then is a matter of knowing SSL or TLS and start implementing connection caching (no need to know about dillo internals). > [...] > > > The idea is interesting. Perhaps looking at the Volume III of > > Douglas Comer's book is well worth a try. I skimmed it yesterday > > and it has a lot of theory about this kind of servers. Do you > > have that volume? > I'm affraid not, I'll see if I can hunt down a cheap copy. Worth a read (although I prefer Richard Stevens' books). > > Now that filter dpis can run in parallel, they're also showing > > the fork hog problem. I'm attaching an example page; drop it > > inside an ftp directory of your local machine and try loading it > > from dillo. > > > > WARNING: don't do it on a server, it can bring down the machine! > > (I've had to switch-off mine to recover). > > > Dpid keeps on forking new instances of the ftp dpi until the > > machine is full of new processes. It looks like when the first > > child can't accept the connection, dpid regards the old request > > as a new one and forks another child. > But dpid accepts the connection from dillo on behalf of filter dpis so any > connections seen by dpid must be new requests. I'll double check that. (It could be that the service FD keeps showing in the select call because it was connected, but never serviced...) > I set up an ftp server on my old 486 and tried out the test page. > And it killed my Xserver! > It also really upset inetd on my 486 which was > running ftpd, inetd reported looping ftp connections and terminated the > service. It also refused further connections for some time afterwards, however > you can get things back to normal by restarting inetd. > > I redirected the messages to a file and tried again, I found multiple > occurences of the following message: > <q> > Dpi_get_server_uds_name:: /tmp/ferdi-khv5us/ftp.filter.dpi > </q> > > this suggests that dillo is actually making multiple requests. > I also found the following error messages from dpid: > <q> > main.c:153: get_command: dpid tag is NULL > : main.c:323: main: get_command failed > </q> > > I still don't know what's going wrong, I'll have another look at this in the > next couple of days, I hope the above information helps. I'll check it too. > > Some time ago I started a download with a graphical dpi, and > > the downloader was open twice! This hints towards the presence of > > a race condition. > What do you mean by graphical dpi? It's an idea I've been preaching on for a long time. But nobody seems to believe until they see! :-) --Blame St. Tomás. > Is there a shiny new downloads server that > I'm missing out on? Yes! MUUUAAHAHAHAHAHAHAA!! It needs polishing but illustrates the idea pretty good. You'd be surprised at how simple it is. BTW, it was developed by a complete newcomer to dillo I was advicing. I'll send it to you and Sebastian (to illustrate part of a response I owe him about preferences). List: I'll review the latest version and decide whether to share it in its current state for polishing. The required knowledge to work on it is minimal: just GTK+ (the server part is already done). More on this later... Anyone interested? > > a race condition: if the father continues running before its > > child accepts, the request may be served twice or more times. > Only if the child terminates before it accepts. > This is because dpid clears the downloader's socket from the > socket_set which > 'select' is watching before forking and the socket is then set again by > dpid.c:handle_sigchld() when the child terminates. Time to review. Regards Jorge.-

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by Sherrie Baily Dec. 4, 2003

Dec. 4, 2003

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Dec. 3, 2003

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gcc 2.95 doesn't know about -Wno-unused-parameter
by David McKee Dec. 3, 2003

Dec. 3, 2003

Jorge, I suppose you're getting tired of hearing about my ancient Redhat system, but my gcc doesn't believe in -Wno-unused-parameters, preferning "-Wno-unused". Easy enough to fix by hand. Perhaps I should look nto configure in my copious spare time. Thanks, -- -- David McKee -- dmckee(a)jlab.org -- (757) 269-7492 (Office)

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[INFRINGEMENT... errr PATCH] Html_image_menu signal propagation cleanup
by Frank de Lange Dec. 3, 2003

Dec. 3, 2003

Hi'all, First, forgive me the snide remark in the title, I am not that fond of lawyer-speak. Second, this is a small cleanup for html.c which removes the need for an explicit signal emission stop in Html_image_menu. The comment in html.c:Html_image_menu() reads: /* If the signal is not stopped, Dw_image_button_press will be called, * and return FALSE, so that the "button_press_event" signal is regarded * as not processed. The fact that here, TRUE is returned, does not seem * to play a role!? */ No, signal return values do not influence the current *emission*, only the *propagation* of it. And, when connected with gtk_signal_connect, the default handler is the last one to run - so it is the return value for the default handler which decides whether the signal will be propagated or not. To have the return value for a custom handler decide this, it needs to be connected with gtk_signal_connect_after so it is the last handler to run. That is all this simple patch does. Cheers//Frank -- WWWWW ________________________ ## o o\ / Frank de Lange \ }# \| / +46-734352015 \ \ `--| _/ <Hacker for Hire> \ `---' \ +31-640037120 / \ frank(a)unternet.org / `------------------------' [ "Omnis enim res, quae dando non deficit, dum habetur et non datur, nondum habetur, quomodo habenda est." ] --- dillo/src/html.c 2003-11-21 22:33:49.000000000 +0100 +++ dillo_patched/src/html.c 2003-12-02 12:59:46.455306584 +0100 @@ -355,11 +355,6 @@ a_Menu_popup_set_url(bw, image->url); gtk_menu_popup(GTK_MENU(bw->menu_popup.over_image), NULL, NULL, NULL, NULL, event->button, event->time); - /* If the signal is not stopped, Dw_image_button_press will be called, - * and return FALSE, so that the "button_press_event" signal is regarded - * as not processed. The fact that here, TRUE is returned, does not seem - * to play a role!? */ - gtk_signal_emit_stop_by_name (GTK_OBJECT (image), "button_press_event"); return TRUE; } @@ -2248,8 +2243,8 @@ Image = Html_add_new_image(html, tag, tagsize, &style_attrs, TRUE); Html_connect_signals(html, GTK_OBJECT(Image->dw)); - gtk_signal_connect(GTK_OBJECT(Image->dw), "button_press_event", - GTK_SIGNAL_FUNC(Html_image_menu), html->bw); + gtk_signal_connect_after(GTK_OBJECT(Image->dw), "button_press_event", + GTK_SIGNAL_FUNC(Html_image_menu), html->bw); /* Image maps */ if (Html_get_attr(html, tag, tagsize, "ismap")) {

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