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#!/bin/sh
# aerc filter to view HTML emails with w3m.
#
# Networking access will be disabled unless the script is named 'html-unsafe'.
#
# If stdout is connected to a TTY, the interactive pager of w3m will be enabled.
set -- w3m \
-I UTF-8 -O UTF-8 -T text/html \
-s -graph \
-o fold_textarea=true \
-o fold_line=true \
-o decode_url=true \
-o display_link=true \
"$@"
if [ -t 1 ]; then
# stdout is connected to a terminal, enable interactive mode
set -- "$@" -o display_borders=true
if w3m --help 2>&1 | head -n1 | grep -q "options.*image"; then
# display inline images if support is enabled
set -- "$@" -o display_image=true -o auto_image=true
fi
else
# stdout is connected to a pager, dump output without interaction
set -- "$@" -cols 100 -dump -o disable_center=true
fi
if ! [ "$(basename $0)" = "html-unsafe" ]; then
# attempt network isolation to prevent any phoning home by rendered emails
set -- "$@" -o no_cache=true -o use_cookie=false
if command -v unshare >/dev/null 2>&1; then
# run the command in a separate network namespace
set -- unshare --map-root-user --net "$@"
elif command -v socksify >/dev/null 2>&1; then
# if socksify (from dante-utils) is available, use it
export SOCKS_SERVER="127.0.0.1:1"
set -- socksify "$@"
else
# best effort, use an invalid address as http proxy
set -- "$@" \
-o use_proxy=true \
-o http_proxy='127.0.0.1:1' \
-o https_proxy='127.0.0.1:1' \
-o gopher_proxy='127.0.0.1:1' \
-o ftp_proxy='127.0.0.1:1'
fi
fi
exec "$@"
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