Ubuntu
cppreference-doc package

Can't be open by Devhelp with the user other than root

Bug #1668085 reported by Sagrer
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
cppreference-doc (Ubuntu)
New
Undecided
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Bug Description

Hi. Sorry for bad English :).

My Devhelp don't want to open CppReference pages, says that it has "Error opening the requested link.".

The situation is the same, as here https://aur.archlinux.org/packages/cppreference-devhelp/

I tried to fix this myself, but after 2 days it seems that i'm at a deadlock. What i know now:

1) All paths are correct, all files are readable, but Devhelp can open files like /usr/share/cppreference/doc/html/en/c.html only when it was done by root. When i try to do this by a regular user - webkit2gtk returns an error code WEBKIT_POLICY_ERROR_FRAME_LOAD_INTERRUPTED_BY_POLICY_CHANGE. Seems that webkit raise this error if it tried to load uri as a page, next it tried to load it as a file, and if all this was unsuccessfull - this error occurs.
2) If i change first line in /usr/share/cppreference/doc/html/en/c.html to something like <!DOCTYPE html> (as for html5) or any older html4 DOCTYPEs - Devhelp begin to work fine with this file. But if there is something like <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML (any XHTML) - Devhelp shows an error. Also i tried to use epiphany-browser - it has the same behavior with local urls (file://).

So, seems that it is a Webkit or Webkit2gtk bug. I tried to debug webkit2gtk, but it is too large and i has too low debugging skills - all stopped on multithreading and IPC - i cant trace full chain, i only see how Devhelp asks webkit to load an URL and then i see how IPC catches a message with error (in GUI thread). Seems i do something wrong or my breakpoints don't work or something else :(.

All this i see on two different computers with Ubuntu 16.10.

So, may be the best way to fix this is just simply to fix "<!DOCTYPE.." in html files? It is not a clean solution, but it will work :).

I use Ubuntu 16.10, cppreference-doc-en-html 20151129+dfsg0-1, devhelp 3.22.0-1, libwebkit2gtk-4.0-37-gtk2 2.14.5-0ubuntu0.16.10.1

Revision history for this message
Sagrer (sagrer) wrote :

made a walkaround
https://github.com/p12tic/cppreference-doc_debian/pull/3/files
and made ppa with modified package
https://launchpad.net/~sagrer/+archive/ubuntu/cppreference-doc

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