Bug#1055971: atril: should not use the filename extension to determine the file type

[Vincent Lefevre <vincent@vinc17.net>]

Package: atril
Version: 1.26.0-2+b1
Severity: normal

Consider a gzipped postscript file with 2 different names:

  file.ps.gz
  file.ps-1.gz

While file.ps.gz can be read correctly by atril, for file.ps-1.gz,
atril gives the following error:

  Unable to open document
  File type Gzip archive (application/gzip) is not supported

Using filename extensions is a bad idea, as filenames may not have
the expected extensions for files downloaded from the web. In
particular, when downloading a file file.ps.gz, Firefox uses this
filename if the file doesn't exist yet, but if it already exists,
Firefox renames it to "file.ps-1.gz" (increasing the number for
each additional download).

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
merged-usr: no
Architecture: amd64 (x86_64)

Kernel: Linux 6.5.0-4-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=POSIX, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages atril depends on:
ii  atril-common                                 1.26.0-2
ii  dconf-gsettings-backend [gsettings-backend]  0.40.0-4
ii  libatk1.0-0                                  2.50.0-1
ii  libatrildocument3                            1.26.0-2+b1
ii  libatrilview3                                1.26.0-2+b1
ii  libc6                                        2.37-12
ii  libcaja-extension1                           1.26.1-1
ii  libgdk-pixbuf-2.0-0                          2.42.10+dfsg-3
ii  libglib2.0-0                                 2.78.1-4
ii  libgtk-3-0                                   3.24.38-6
ii  libice6                                      2:1.0.10-1
ii  libsecret-1-0                                0.21.1-1
ii  libsm6                                       2:1.2.3-1
ii  libxml2                                      2.9.14+dfsg-1.3
ii  shared-mime-info                             2.2-1

Versions of packages atril recommends:
hi  dbus-user-session [default-dbus-session-bus]  1.14.10-1
hi  dbus-x11 [dbus-session-bus]                   1.14.10-1
ii  gvfs                                          1.52.1-1

Versions of packages atril suggests:
pn  caja          <none>
ii  poppler-data  0.4.12-1
pn  unrar         <none>

-- no debconf information

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)