bug#40425: 26.3; eww-open-file is not working with a Tramp file name

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[H. Dieter Wilhelm]

Hello

here's an example:

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  url-file-asynch-callback(nil nil nil
"/:/ssh:stories:/home/larsi/.emacs.d/bookiez.data" #<buffer
*url-file*-73983> eww-render (nil
"file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." nil #<buffer
*eww*>))
  url-file(#s(url :type "file" :user nil :password nil :host ""
:portspec nil :filename
"/ssh:stories:/home/larsi/.emacs.d/bookiez.data" :target nil
:attributes nil :fullness t :silent nil :use-cookies t :asynchronous
t) eww-render (nil
"file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." nil #<buffer
*eww*>))
  url-retrieve-internal("file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..."
eww-render (nil
"file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." nil #<buffer
*eww*>) nil nil)
  url-retrieve("file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." eww-render ("file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." nil #<buffer *eww*>))
  eww("file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d...")
  eww-open-file("/ssh:stories:.emacs.d/bookiez.data")
  funcall-interactively(eww-open-file "/ssh:stories:.emacs.d/bookiez.data")

Thank you

      Dieter


In GNU Emacs 26.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2019-12-14 built on ping
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description:	Ubuntu 18.04 LTS (beaver-three-eyed-raven X92)

Recent messages:
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Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM THREADS LCMS2

Important settings:
  value of $LC_MONETARY: de_DE.UTF-8
  value of $LC_NUMERIC: de_DE.UTF-8
  value of $LC_TIME: de_DE.UTF-8
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Info

Minor modes in effect:
  recentf-mode: t
  diff-auto-refine-mode: t
  global-flycheck-mode: t
  display-battery-mode: t
  display-time-mode: t
  show-paren-mode: t
  electric-pair-mode: t
  shell-dirtrack-mode: t
  async-bytecomp-package-mode: t
  ivy-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: 1

Load-path shadows:
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/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-hledger hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-hledger
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-datetree hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-datetree
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-css hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-css
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-io hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-io
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-sed hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-sed
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-sqlite hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-sqlite
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-compat hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-compat
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-org hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-org
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-publish hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-publish
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ref hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ref
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-java hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-java
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-perl hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-perl
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-org hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-org
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-entities hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-entities
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-R hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-R
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-forth hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-forth
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-inlinetask hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-inlinetask
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-capture hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-capture
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-duration hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-duration
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-C hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-C
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/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-dot hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-dot
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-plot hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-plot
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-clojure hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-clojure
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-lint hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-lint
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-asymptote hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-asymptote
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-stan hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-stan
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-version hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-version
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-indent hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-indent
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-exp hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-exp
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/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ruby hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ruby
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-agenda hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-agenda
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-mobile hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-mobile
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-latex hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-latex
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-mouse hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-mouse
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-makefile hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-makefile
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-list hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-list
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-eval hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-eval
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-lua hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-lua
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-man hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-man
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-odt hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-odt
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-sql hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-sql
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ebnf hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ebnf
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-calc hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-calc
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-feed hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-feed
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-shen hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-shen
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-mscgen hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-mscgen
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/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-plantuml hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-plantuml
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-sass hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-sass
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-element hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-element
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-J hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-J
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-fortran hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-fortran
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-table hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-table
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-colview hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-colview
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-icalendar hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-icalendar
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-scheme hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-scheme
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-core hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-core
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-src hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-src
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-awk hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-awk
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-timer hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-timer
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ledger hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ledger
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-latex hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-latex
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-tangle hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-tangle
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-lob hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-lob
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-archive hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-archive
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-processing hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-processing
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-habit hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-habit
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-crypt hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-crypt
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-comint hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-comint
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org hides /usr/local/src/emacs/emacs-26.3/lisp/org/org
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ditaa hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ditaa
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-html hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-html
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-ascii hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-ascii
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-install hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-install
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-coq hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-coq
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-attach hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-attach
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-footnote hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-footnote
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-haskell hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-haskell
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-md hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-md
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-vala hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-vala
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-texinfo hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-texinfo
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-ctags hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-ctags
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-macro hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-macro
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-picolisp hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-picolisp
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-js hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-js
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-groovy hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-groovy
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-clock hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-clock
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-screen hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-screen
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-emacs-lisp hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-emacs-lisp
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-lilypond hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-lilypond
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-macs hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-macs
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-loaddefs hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-loaddefs
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-python hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-python
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-shell hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-shell
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-lisp hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-lisp
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-faces hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-faces
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-pcomplete hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-pcomplete
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-octave hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-octave
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-gnuplot hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-gnuplot
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-abc hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-abc
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/org-id hides /usr/local/src/emacs/emacs-26.3/lisp/org/org-id
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-matlab hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-matlab
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ox-beamer hides /usr/local/src/emacs/emacs-26.3/lisp/org/ox-beamer
/home/dieter/.emacs.d/elpa/org-plus-contrib-20200330/ob-ocaml hides /usr/local/src/emacs/emacs-26.3/lisp/org/ob-ocaml
/home/dieter/.emacs.d/elpa/soap-client-3.1.5/soap-inspect hides /usr/local/src/emacs/emacs-26.3/lisp/net/soap-inspect
/home/dieter/.emacs.d/elpa/soap-client-3.1.5/soap-client hides /usr/local/src/emacs/emacs-26.3/lisp/net/soap-client
/home/dieter/.emacs.d/elpa/let-alist-1.0.6/let-alist hides /usr/local/src/emacs/emacs-26.3/lisp/emacs-lisp/let-alist

Features:
(shadow emacsbug gnus-dup smtpmail ivy-hydra ibuf-ext ibuffer
ibuffer-loaddefs autoload eieio-opt speedbar sb-image ezimage dframe
cus-edit cus-start cus-load lisp-mnt rmailkwd term ehelp ispell pcase
recentf tree-widget bookmark canlock misearch multi-isearch mailalias
bbdb-message sendmail sort gnus-cite smiley shr-color mm-archive
mail-extr gnus-async gnus-bcklg qp gnus-ml disp-table nndraft nnmh
nnmbox utf-7 nnfolder bbdb-gnus bbdb-mua bbdb-com crm epa-file
network-stream starttls gnus-agent gnus-srvr gnus-score score-mode
nnvirtual gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime dig
nntp gnus-cache mhtml-mode css-mode js cc-mode cc-fonts cc-guess
cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs sgml-mode
files-x tramp-cache tramp-sh ffap tramp tramp-compat tramp-loaddefs
trampver ucs-normalize pp cl-print help-fns radix-tree time-stamp
term/xterm xterm url-file url-dired url-cache eww mm-url shr svg dom
apdl-mode align apdl-wb-template apdl-template apdl-process
apdl-initialise apdl-keyword sh-script smie executable cursor-sensor
vc-mtn vc-hg vc-git diff-mode vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs
vc vc-dispatcher imenu ess-r-mode ess-r-flymake flymake-proc flymake
thingatpt ess-r-xref xref ess-trns ess-r-package ess-r-completion
ess-roxy ess-r-syntax ess-rd hideshow ess-s-lang ess-help ess-mode
ess-inf project ess-tracebug ess ess-utils ess-custom compile flycheck
cl-extra help-mode rx subr-x cal-china lunar solar cal-dst cal-bahai
cal-islam cal-hebrew holidays hol-loaddefs appt diary-lib diary-loaddefs
battery time server org-eldoc ol-eww ol-rmail ol-mhe ol-irc ol-info
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multi-tty make-network-process emacs)

Memory information:
((conses 16 3029733 168528)
 (symbols 48 68707 4)
 (miscs 40 1516 1649)
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 (string-bytes 1 19330469)
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 (intervals 56 379929 12954)
 (buffers 992 85))

-- 
Best wishes
H. Dieter Wilhelm
Zwingenberg, Germany

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

dieter@duenenhof-wilhelm.de (H. Dieter Wilhelm) writes:

> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>   url-file-asynch-callback(nil nil nil
> "/:/ssh:stories:/home/larsi/.emacs.d/bookiez.data" #<buffer
> *url-file*-73983> eww-render (nil
> "file:///ssh:stories:/home/larsi/.emacs.d/bookiez.d..." nil #<buffer
> *eww*>))

This is due to the following patch, and the moron who committed it
neglected to say what problem it was trying to fix:

commit 023ec128fd95eadac7b607177969267cc8b9accf
Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
Date:   Tue Nov 16 14:46:12 2010 +0100

    Avoid interpreting file:/foo:/bar URLs via tramp.

The following patch makes the test case work again...  but this is
basically what I added in 2010:

diff --git a/lisp/url/url-file.el b/lisp/url/url-file.el
index eec7cdfbe8..77495d7e57 100644
--- a/lisp/url/url-file.el
+++ b/lisp/url/url-file.el
@@ -110,9 +110,6 @@ url-file-build-filename
 		    ((and (string-match "\\`/[a-zA-Z]:/" file)
 			  (memq system-type '(ms-dos windows-nt)))
 		     (substring file 1))
-		    ;; file: URL with a file:/bar:/foo-like spec.
-		    ((string-match "\\`/[^/]+:/" file)
-		     (concat "/:" file))
 		    (t
 		     file))))
 
*sigh*

My guess is that this attempt to fix the problem of file names that
contain colons without actually being tramp files?

I don't quite know what the solution is here...  it does seem odd for a
low-level library like URL to call out to tramp -- that may even have
security implications: It's very unexpected that (say) hitting a link on
a web page ends up with you ssh-ing to a local machine.  So in that
regard I agree with my 2010 self.

But it does make eww-open-file, which should accept tramp file names,
very awkward to implement...

Any opinions?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Michael Albinus]

Lars Ingebrigtsen <larsi@gnus.org> writes:

Hi Lars,

> I don't quite know what the solution is here...  it does seem odd for a
> low-level library like URL to call out to tramp -- that may even have
> security implications: It's very unexpected that (say) hitting a link on
> a web page ends up with you ssh-ing to a local machine.  So in that
> regard I agree with my 2010 self.
>
> But it does make eww-open-file, which should accept tramp file names,
> very awkward to implement...
>
> Any opinions?

You could do something around (or (file-local-copy file) file)

Best regards, Michael.

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

Michael Albinus <michael.albinus@gmx.de> writes:

> You could do something around (or (file-local-copy file) file)

Thanks...  eww would have to delete the local copy of the file after
rendering, I guess?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Michael Albinus]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Thanks...  eww would have to delete the local copy of the file after
> rendering, I guess?

Yes. And it should handle links to relative files similar.

Best regards, Michael.

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

Michael Albinus <michael.albinus@gmx.de> writes:

>> Thanks...  eww would have to delete the local copy of the file after
>> rendering, I guess?
>
> Yes. And it should handle links to relative files similar.

I'm not sure I follow you.  Why should eww copy files that are pointed
to by relative URLs?

Anyway, I'm not very enthusiastic at the idea of making local file
copies -- cleaning up isn't guaranteed (if Emacs crashes, for instance),
and files left behind may be a security concern.

Perhaps eww-open-file could just be rewritten to load the file into a
temporary buffer, parse it and then render it, and avoid the URL library
altogether...  I don't see any huge downside to doing it that way.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Perhaps eww-open-file could just be rewritten to load the file into a
> temporary buffer, parse it and then render it, and avoid the URL library
> altogether...  I don't see any huge downside to doing it that way.

I've now done this in Emacs 28.1.

One downside is that relative links in a non-local HTML file still won't
work...  but I'm not sure whether that's really much of an issue.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[H. Dieter Wilhelm]

Dear Emacs maintainers

Please let me explain the background of the bug report:

I'm providing a library for a programming mode (apdl-mode) where you can
request manual entries for the language keywords.  Usually these html
manuals are either stored in the cloud or locally on a workstation where
you are, both, coding and running the finite element code.

But now a user is applying Tramp to code remotely on his workstation and
also wants to access the said html manual pages which are stored on his
remote machine.

Actually I think this is a reasonable use case for EWW. :-)

Granted, a possible solution would be to copy the whole manual locally
to his laptop.  But this would require some extra configuration and
tinkering on the user's side. :-/

Lars Ingebrigtsen <larsi@gnus.org> writes:
> I've now done this in Emacs 28.1.

Thank very much you but ...

> One downside is that relative links in a non-local HTML file still won't
> work...  but I'm not sure whether that's really much of an issue.

Unfortunately, in this case it is!  Not aware of the downside I tried
this idea before in apdl-mode but the user is - with reason -
complaining about this workaround.  You know, reference links are so
essential for manuals.

Maybe the context information will persuade you to think about another
approach?

Thank you for your help and have a good time

      Dieter

-- 
Best wishes
H. Dieter Wilhelm
Zwingenberg, Germany

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

dieter@duenenhof-wilhelm.de (H. Dieter Wilhelm) writes:

> I'm providing a library for a programming mode (apdl-mode) where you can
> request manual entries for the language keywords.  Usually these html
> manuals are either stored in the cloud or locally on a workstation where
> you are, both, coding and running the finite element code.
>
> But now a user is applying Tramp to code remotely on his workstation and
> also wants to access the said html manual pages which are stored on his
> remote machine.
>
> Actually I think this is a reasonable use case for EWW. :-)

Yeah, that's true.  I've now reopened this bug report.

If the base document is fetched via Tramp, then relative links to
further documents via Tramp isn't a security concern at all.

I'm just wondering on what level this should be fixed at.  eww could add
further support for these relative links itself, or the url-file.el
library could grow some overrides to allow following Tramp file
names...  Hm...  The latter seems easier to implement, but I feel that
perhaps the former is what makes most sense.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Michael Albinus]

Lars Ingebrigtsen <larsi@gnus.org> writes:

Hi Lars,

> I'm just wondering on what level this should be fixed at.  eww could add
> further support for these relative links itself, or the url-file.el
> library could grow some overrides to allow following Tramp file
> names...  Hm...  The latter seems easier to implement, but I feel that
> perhaps the former is what makes most sense.

There is url-tramp-file-handler, called from url-file-handler (package
url-handlers.el). I haven't tried it for a long time, prick me if there
are problems.

Best regards, Michael.

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

Michael Albinus <michael.albinus@gmx.de> writes:

> There is url-tramp-file-handler, called from url-file-handler (package
> url-handlers.el). I haven't tried it for a long time, prick me if there
> are problems.

Hm...  I don't think that needs to be involved, though -- eww just needs
to know that the base document is a non-local file, and then do the
right thing when computing relative links (instead of punting to the url
library).

I think.  I haven't started implementing it.  :-/

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Hm...  I don't think that needs to be involved, though -- eww just needs
> to know that the base document is a non-local file, and then do the
> right thing when computing relative links (instead of punting to the url
> library).

I've now fixed this in Emacs 29.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[H. Dieter Wilhelm]

[-- Attachment #1: Type: text/plain, Size: 662 bytes --]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
>> Hm...  I don't think that needs to be involved, though -- eww just needs
>> to know that the base document is a non-local file, and then do the
>> right thing when computing relative links (instead of punting to the url
>> library).
>
> I've now fixed this in Emacs 29.

Thank you for your efforts Lars and Michael.

Just did in the master branch folder

  git pull
  make bootstrap
  emacs -Q
  eww-open-file /ssh:wawa:/srv/public/en-us/help/ans_elem/Hlp_E_CONTA178.html

But I don't see images from relative links within above file.  Please
see the attached image.


[-- Attachment #2: Emacs-29_2022-02-20.png --]
[-- Type: image/png, Size: 332983 bytes --]

[-- Attachment #3: Type: text/plain, Size: 975 bytes --]



Can I check something else?

The following is an excerpt from the html file on the remote machine for
the respective link (the graphics/ folder and its contents are also
present on the remote machine).

<a class="link" href="Hlp_E_COMBIN40.html" title="COMBIN40"><span class="structname">COMBIN40</span></a>, are also available.</p><div class="figure"><a name="CONTA178.fig.1"></a><p class="title"><b>Figure 178.1:  CONTA178 Geometry</b></p><div class="figure-contents"><div><img src="graphics/gelem178-1.svg" alt="CONTA178 Geometry"></div></div></div><br class="figure-break"></div><div class="refsect1" title="CONTA178 Input Data"><a name="CONTA178.input"></a><h2>CONTA178 Input Data</h2><p>The geometry, node locations, and the coordinate system for this element are shown in
            the <span class="structname">CONTA178</span> figure above. The element is defined by two nodes,

Thanks a lot

       Dieter


-- 
Best wishes
H. Dieter Wilhelm
Zwingenberg, Germany

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[Lars Ingebrigtsen]

"H. Dieter Wilhelm" <dieter@duenenhof-wilhelm.de> writes:

> But I don't see images from relative links within above file.  Please
> see the attached image.

Ah, this worked for me because url.el had already cached the images.  I
think I've now fixed this, too.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#40425: 26.3; eww-open-file is not working with a Tramp file name

[H. Dieter Wilhelm]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "H. Dieter Wilhelm" <dieter@duenenhof-wilhelm.de> writes:
>
>> But I don't see images from relative links within above file.  Please
>> see the attached image.
>
> Ah, this worked for me because url.el had already cached the images.  I
> think I've now fixed this, too.

Right, the images are showing up now, great stuff! :-)

        Dieter
-- 
Best wishes
H. Dieter Wilhelm
Zwingenberg, Germany