--- /dev/null
+cgilite
+serverkey
+users.db
--- /dev/null
+#!/bin/sh
+
+# Copyright 2017 - 2021 Paul Hänsch
+#
+# This is CGIlite.
+# A collection of posix shell functions for writing CGI scripts.
+#
+# CGIlite is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# CGIlite is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with CGIlite. If not, see <http://www.gnu.org/licenses/>.
+
+[ -n "$include_cgilite" ] && return 0
+# guard set after webserver part
+
+# ksh and zsh workaround
+# set -o posix # ksh, not portable
+setopt -o OCTAL_ZEROES 2>&-
+
+# Integrated webserver request timeout
+cgilite_timeout=2
+
+# General environment variables
+# $_EXEC - directory containing application itself
+# $_DATA - direcotry where application data may be stored
+# $_BASE - optional prefix for http path, e.g. "/myapp"
+#
+# Programmers should take care to use those variables throughout the
+# application.
+# Variables may be set via CLI argument, in environment, or left as default.
+
+for cgilite_arg in "$@"; do case $cgilite_arg in
+ --exec=*) _EXEC="${cgilite_arg#*=}";;
+ --data=*) _DATA="${cgilite_arg#*=}";;
+ --base=*) _BASE="${cgilite_arg#*=}";;
+esac; done
+unset cgilite_arg
+
+_EXEC="${_EXEC:-${0%/*}}"
+_DATA="${_DATA:-.}"
+_EXEC="${_EXEC%/}" _DATA="${_DATA%/}" _BASE="${_BASE%/}"
+
+export _EXEC _DATA _BASE
+
+# Carriage Return and Line Break characters for convenience
+CR="\r"
+BR='
+'
+
+PATH(){
+ local str seg out
+ # normalize path
+ # read from stdin if no arguments are provided
+
+ [ $# -eq 0 ] && str="$(cat)" || str="$*"
+ while [ "$str" ]; do
+ seg=${str%%/*}; str="${str#*/}"
+ case $seg in
+ ..) out="${out%/}"; out="${out%/*}/";;
+ .|'') out="${out%/}/";;
+ *) out="${out%/}/${seg}";;
+ esac;
+ [ "$seg" = "$str" ] && break
+ done
+ [ "${str}" -a "${out}" ] && printf %s "$out" || printf %s/ "${out%/}"
+}
+
+HEX_DECODE(){
+ local pfx="$1" in="$2" out
+ # Print out Data encoded as Hex
+ #
+ # Arguments:
+ # pfx - required, prefix for a hex tupel, e.g. "\x", "%" "\", may be empty
+ # in - required, string to be decoded
+ #
+ # anything that does not constitute a tupel of valid Hex numerals
+ # will be copied to the output literally
+
+ while [ "$in" ]; do
+ case $in in
+ "$pfx"[0-9a-fA-F][0-9a-fA-F]*) in="${in#${pfx}}";;
+ \\*) in="${in#?}"; out="${out}\\\\"; continue;;
+ %*) in="${in#?}"; out="${out}%%"; continue;;
+ *) out="${out}${in%"${in#?}"}"; in="${in#?}"; continue;;
+ esac;
+
+ # Hex escapes for printf (e.g. \x41) are not portable
+ # The portable way for Hex output is transforming Hex to Octal
+ # (e.g. \x41 = \101)
+ case $in in
+ [0123]?*) out="${out}\\0";;
+ [4567]?*) out="${out}\\1";;
+ [89aAbB]?*) out="${out}\\2";;
+ [c-fC-F]?*) out="${out}\\3";;
+ esac
+ case $in in
+ [048cC][0-7]*) out="${out}0";;
+ [048cC][89a-fA-F]*) out="${out}1";;
+ [159dD][0-7]*) out="${out}2";;
+ [159dD][89a-fA-F]*) out="${out}3";;
+ [26aAeE][0-7]*) out="${out}4";;
+ [26aAeE][89a-fA-F]*) out="${out}5";;
+ [37bBfF][0-7]*) out="${out}6";;
+ [37bBfF][89a-fA-F]*) out="${out}7";;
+ esac
+ case $in in
+ ?[08]*) out="${out}0";;
+ ?[19]*) out="${out}1";;
+ ?[2aA]*) out="${out}2";;
+ ?[3bB]*) out="${out}3";;
+ ?[4cC]*) out="${out}4";;
+ ?[5dD]*) out="${out}5";;
+ ?[6eE]*) out="${out}6";;
+ ?[7fF]*) out="${out}7";;
+ esac
+ in="${in#?}"
+ in="${in#?}"
+ done
+ printf -- "$out"
+}
+
+if [ -z "$REQUEST_METHOD" ]; then
+ # no webserver variables means we are running via inetd / ncat
+ # so use builtin web server
+
+ # Use env from inetd as webserver variables
+ REMOTE_ADDR="${TCPREMOTEIP}"
+ SERVER_NAME="${TCPLOCALIP}"
+ SERVER_PORT="${TCPLOCALPORT}"
+
+ # Wait 2 seconds for request or kill connection through watchdog.
+ # Once Request is received the watchdog will be suspended (killed).
+ # At the end of the loop the watchdog will be restarted to enable
+ # timeout for the subsequent request.
+
+ (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
+ while read REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL; do
+ [ "${SERVER_PROTOCOL#HTTP/1.[01]${CR}}" ] && break
+ kill $cgilite_watchdog
+
+ SERVER_PROTOCOL="${SERVER_PROTOCOL%${CR}}"
+ PATH_INFO="$(HEX_DECODE % "${REQUEST_URI%\?*}" |PATH)"
+ [ "${REQUEST_URI}" = "${REQUEST_URI#*\?}" ] \
+ && QUERY_STRING='' \
+ || QUERY_STRING="${REQUEST_URI#*\?}"
+ cgilite_headers=''; while read -r hl; do
+ hl="${hl%${CR}}"; [ "$hl" ] || break
+ case $hl in
+ 'Content-Length: '*) CONTENT_LENGTH="${hl#*: }";;
+ 'Content-Type: '*) CONTENT_TYPE="${hl#*: }";;
+ esac
+ cgilite_headers="${cgilite_headers}${hl}${BR}"
+ done
+
+ export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
+ PATH_INFO QUERY_STRING CONTENT_TYPE CONTENT_LENGTH
+
+ # Try to serve multiple requests, provided that script serves a
+ # Content-Length header.
+ # Without Content-Length header, connection will terminate after
+ # script.
+
+ cgilite_status='200 OK'; cgilite_response=''; cgilite_cl="Connection: close${CR}${BR}";
+ . "$0" | while read -r l; do case $l in
+ Status:*)
+ cgilite_status="${l#Status: }";;
+ Content-Length:*)
+ cgilite_cl=""
+ cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";;
+ Connection:*)
+ cgilite_cl="${l}${BR}";;
+ $CR) printf '%s %s\r\n%s%s\r\n' \
+ 'HTTP/1.1' "${cgilite_status%${CR}}" \
+ "${cgilite_response}${cgilite_response:+${BR}}" "${cgilite_cl}"
+ cat || kill $$
+ [ "${cgilite_cl#Connection}" = "${cgilite_cl}" ]; exit;;
+ *) cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";;
+ esac; done || exit 0;
+ (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
+ done
+ kill $cgilite_watchdog
+ exit 0
+fi
+
+include_cgilite="$0"
+
+if [ "${REQUEST_METHOD}" = POST -a "${CONTENT_LENGTH:-0}" -gt 0 -a \
+ "${CONTENT_TYPE}" = "application/x-www-form-urlencoded" ]; then
+ cgilite_post="$(head -c "$CONTENT_LENGTH")"
+fi
+
+PATH_INFO="$(PATH "/${PATH_INFO#${_BASE}}")"
+
+debug(){ [ $# -gt 0 ] && printf '%s\n' "$@" >&2 || tee -a /dev/stderr; }
+[ "${DEBUG+x}" ] && env >&2
+
+# general helper functions, see GET, POST, and REF below
+
+cgilite_count(){
+ printf %s "&$1" \
+ | grep -oE '&'"$2"'=[^&]*' \
+ | wc -l
+}
+
+cgilite_value(){
+ local str="&$1" name="$2" cnt="${3:-1}"
+ while [ $cnt -gt 0 ]; do
+ [ "${str}" = "${str#*&${name}=}" ] && return 1
+ str="${str#*&${name}=}"
+ cnt=$((cnt - 1))
+ done
+ HEX_DECODE % "$(printf %s "${str%%&*}" |tr + \ )"
+}
+
+cgilite_keys(){
+ local str="&$1"
+ while [ "${str#*&}" != "${str}" ]; do
+ str="${str#*&}"
+ printf '%s\n' "${str%%=*}"
+ done \
+ | sort -u
+}
+
+# Read arguments from GET, POST, or the query string of the referrer (REF).
+# Example:
+# GET varname n
+#
+# where n is number for the Nth occurence of a variable and defaults to 1
+#
+# *_COUNT varname
+# -> returns number of ocurences
+# *_KEYS
+# -> returns list of available varnames
+
+GET(){ cgilite_value "${QUERY_STRING}" "$@"; }
+GET_COUNT(){ cgilite_count "${QUERY_STRING}" $1; }
+GET_KEYS(){ cgilite_keys "${QUERY_STRING}"; }
+
+POST(){ cgilite_value "${cgilite_post}" "$@"; }
+POST_COUNT(){ cgilite_count "${cgilite_post}" $1; }
+POST_KEYS(){ cgilite_keys "${cgilite_post}"; }
+
+REF(){ cgilite_value "${HTTP_REFERER#*\?}" "$@"; }
+REF_COUNT(){ cgilite_count "${HTTP_REFERER#*\?}" $1; }
+REF_KEYS(){ cgilite_keys "${HTTP_REFERER#*\?}"; }
+
+HEADER(){
+ # Read value of header line. Use this instead of
+ # referencing HTTP_* environment variables.
+ if [ -n "${cgilite_headers+x}" ]; then
+ local str="${BR}${cgilite_headers}"
+ [ "${str}" = "${str#*${BR}${1}: }" ] && return 1
+ str="${str#*${BR}${1}: }"
+ printf %s "${str%%${BR}*}"
+ else
+ local var="HTTP_$(printf %s "$1" |tr a-z- A-Z-)"
+ eval "[ \"\$$var\" ] && printf %s \"\$$var\" || return 1"
+ # eval "printf %s \"\$HTTP_$(printf %s "${1}" |tr a-z A-Z |tr -c A-Z _)\""
+ fi
+}
+
+COOKIE(){
+ # Read value of cookie
+ HEX_DECODE % "$(
+ HEADER Cookie \
+ | grep -oE '(^|; ?)'"$1"'=[^;]*' \
+ | sed -En "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
+ )"
+}
+
+HTML(){
+ # Escape HTML cahracters
+ # Also escape [, ], and \n for use in html-sh
+ local str out
+ [ $# -eq 0 ] && str="$(cat)" || str="$*"
+ while [ "$str" ]; do case $str in
+ \&*) out="${out}&"; str="${str#?}";;
+ \<*) out="${out}<"; str="${str#?}";;
+ \>*) out="${out}>"; str="${str#?}";;
+ \"*) out="${out}""; str="${str#?}";;
+ \'*) out="${out}'"; str="${str#?}";;
+ \[*) out="${out}["; str="${str#?}";;
+ \]*) out="${out}]"; str="${str#?}";;
+ "${CR}"*) out="${out}
"; str="${str#?}";;
+ "${BR}"*) out="${out}
"; str="${str#?}";;
+ *) out="${out}${str%%[]&<>\"\'[]*}"; str="${str#"${str%%[]&<>\"\'[]*}"}";;
+ esac; done
+ printf %s "$out"
+}
+
+URL(){
+ # Escape pathes, so they can be used in link tags and HTTP Headers
+ local str out
+ [ $# -eq 0 ] && str="$(cat)" || str="$*"
+ while [ "$str" ]; do case $str in
+ \&*) out="${out}%26"; str="${str#?}";;
+ \"*) out="${out}%22"; str="${str#?}";;
+ \'*) out="${out}%27"; str="${str#?}";;
+ \?*) out="${out}%3F"; str="${str#?}";;
+ \#*) out="${out}%23"; str="${str#?}";;
+ \[*) out="${out}%5B"; str="${str#?}";;
+ \]*) out="${out}%5D"; str="${str#?}";;
+ \ *) out="${out}%20"; str="${str#?}";;
+ " "*) out="${out}%09"; str="${str#?}";;
+ "${CR}"*) out="${out}%0D"; str="${str#?}";;
+ "${BR}"*) out="${out}%0A"; str="${str#?}";;
+ %*) out="${out}%25"; str="${str#?}";;
+ *) out="${out}${str%%[]&\"\'\?# ${CR}${BR}%[]*}"; str="${str#"${str%%[]&\"\'\?# ${CR}${BR}%[]*}"}";;
+ esac; done
+ printf %s "$out"
+}
+
+SET_COOKIE(){
+ # Param: session | +seconds | [date]
+ # Param: name=value
+ # Param: Path= | Domain= | Secure
+ local expire cookie
+ case "$1" in
+ ''|0|session) expire='';;
+ [+-][0-9]*) expire="$(date -R -d @$(($(date +%s) + $1)))";;
+ *) expire="$(date -R -d "$1")";;
+ esac
+ cookie="$2"
+
+ printf 'Set-Cookie: %s; HttpOnly; SameSite=Lax' "$cookie"
+ [ -n "$expire" ] && printf '; Expires=%s' "${expire%+????}${expire:+GMT}"
+ [ $# -ge 3 ] && shift 2 && printf '; %s' "$@"
+ printf '\r\n'
+}
+
+REDIRECT(){
+ # Trigger redirct and terminate script
+ printf '%s: %s\r\n' \
+ Status "303 See Other" \
+ Content-Length 0 \
+ Location "$*"
+ printf '\r\n'
+ exit 0
+}
--- /dev/null
+/* ======= GENERIC HTML STYLES ======= */
+
+* {
+ box-sizing: border-box;
+ position: relative;
+ font: inherit;
+ text-decoration: inherit;
+ color: inherit; background: transparent;
+ max-width: 100%;
+ margin: 0; padding: 0;
+ border: none;
+}
+
+body {
+ font: normal normal normal medium/1.5em sans-serif;
+ color: #000; background: #FFF;
+}
+
+ul, ol, dl, table, p { margin-bottom: .5em; }
+
+a {
+ font-style: italic;
+ text-decoration: underline;
+ color: #068;
+}
+a.button {
+ font-style: inherit;
+ text-decoration: inherit;
+ color: inherit;
+}
+
+sup { vertical-align: super; }
+sub { vertical-align: sub; }
+small { font-size: .75em; }
+big { font-size: 1.25em; }
+strike, del, s { text-decoration: line-through; }
+u {text-decoration: underline; }
+i, em { font-style: italic; }
+b, strong { font-weight: bolder; }
+tt, code, var, samp, kbd { font-family: monospace; }
+kbd { font-style: italic; }
+
+ul, ol { margin-left: 1.125em; }
+dl dt { font-weight: bolder; }
+table th { font-weight: bold; }
+
+h1, h2, h3 {
+ font-weight: bold;
+ margin-top: .75em;
+ margin-bottom: .5em;
+}
+
+h4, h5, h6, form legend {
+ font-weight: bolder;
+ margin-bottom: .25em;
+}
+
+h1 { font-size: 1.5em; }
+h2 { font-size: 1.125em; }
+
+select, input, button, textarea, a.button {
+ display: inline-block;
+ color: #000; background-color: #FFF;
+ border: .5pt solid;
+ padding: .25em .75em;
+ vertical-align: text-bottom;
+ border: .5pt solid #000;
+ border-radius: 2pt;
+}
+select { padding: .375em 0; }
+textarea { min-height: 7em; }
+
+input[type=radio], input[type=checkbox] {
+ vertical-align: baseline;
+}
+input[type=number] { text-align: right; padding-right: 0; }
+
+button, input[type=button], a.button {
+ box-shadow: .125em .125em .25em;
+ cursor: pointer;
+}
+input[type=radio], input[type=checkbox], label[for] {
+ cursor: pointer;
+}
+
+label { margin-right: .75em; }
+input + label {
+ margin-left: .375em;
+}
+
+@media print {
+ @page { margin: 20mm; }
+
+ h1 { text-align: center; }
+
+ h1, h2, h3, h4, h5, h6, form legend {
+ page-break-inside: avoid;
+ page-break-after: avoid;
+ page-break-before: auto;
+ }
+ li { page-break-inside: avoid; }
+ th, dt { page-break-after: avoid; }
+}
+
+/* ======= End Generic Styles ======= */
+
+/* ======= Common Styles ======= */
+
+*[tooltip]:hover:after {
+ display: block;
+ position: absolute;
+ min-width: 12em;
+ bottom: 100%; left: 50%; transform: translate(-50%, 0);
+ content: attr(tooltip);
+ padding: .5em;
+ color: #000; background-color: #FFC;
+ border: .5pt solid;
+ z-index: 1;
+}
+
+input[type=radio].tab { display: none; }
+input[type=radio].tab + label {
+ display: table-cell;
+ padding: .5em 1em;
+ color: #000; background-color: #EEE;
+ border: .5pt solid;
+}
+input[type=radio].tab:checked + label {
+ background-color: #FFF;
+ border-bottom: none;
+ box-shadow: .125em -.125em .125em #888;
+ z-index: 1;
+}
+input[type=radio].tab ~ *.tab {
+ display: none;
+ width: 100%;
+ margin-top: -.5pt; padding: .25em .75em;
+ border: .5pt solid;
+ border-radius: 0;
+ box-shadow: .125em .125em .125em #888;
+}
+
+/* ======= End Common Styles ======= */
--- /dev/null
+#!/bin/sh
+
+# Copyright 2016 - 2019 Paul Hänsch
+#
+# This file is part of cgilite.
+#
+# cgilite is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cgilite is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with cgilite. If not, see <http://www.gnu.org/licenses/>.
+
+[ -n "$include_fileserve" ] && return 0
+include_fileserve="$0"
+
+file_type(){
+ case ${1##*.} in
+ html|html) printf 'text/html';;
+ css) printf 'text/css';;
+ js) printf 'text/javascript';;
+ txt) printf 'text/plain';;
+ sh) printf 'text/shellscript';;
+ jpg|jpeg) printf 'image/jpeg';;
+ png) printf 'image/png';;
+ svg) printf 'image/svg+xml';;
+ gif) printf 'image/gif';;
+ webm) printf 'video/webm';;
+ mp4|m4v) printf 'video/mp4';;
+ m4a) printf 'audio/mp4';;
+ ogg) printf 'audio/ogg';;
+ xml) printf 'application/xml';;
+ m3u8) printf 'application/x-mpegURL';;
+ ts) printf 'video/MP2T';;
+ mpd) printf 'application/dash+xml';;
+ m4s) printf 'video/iso.segment';;
+ *) printf 'application/octet-stream';;
+ esac
+}
+
+FILE(){
+ local file file_size file_date http_date cachedate range mime
+ file="$1" mime="$2"
+
+ if ! [ -f "$file" ]; then
+ printf 'Content-Length: 0\r\nStatus: 404 Not Found\r\n\r\n'
+ exit 0
+ elif ! [ -r "$file" ]; then
+ printf 'Content-Length: 0\r\nStatus: 403 Forbidden\r\n\r\n'
+ exit 0
+ fi
+
+ file_size="$(stat -Lc %s "$file")"
+ file_date="$(stat -Lc %Y "$file")"
+ http_date="$(date -ud "@$file_date" +"%a, %d %b %Y %T GMT")"
+ cachedate="$(
+ # Parse the allowable date formats from Section 3.3.1 of
+ # https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html
+ HEADER If-Modified-Since \
+ | sed -E 's;^[^ ]+, ([0-9]{2}) (...) ([0-9]{4}) (..:..:..) GMT$;\3-\2-\1 \4;;
+ s;^[^ ]+, ([0-9]{2})-(...)-([789][0-9]) (..:..:..) GMT$;19\3-\2-\1 \4;;
+ s;^[^ ]+, ([0-9]{2})-(...)-([0-6][0-9]) (..:..:..) GMT$;20\3-\2-\1 \4;;
+ s;^[^ ]+ (...) ([0-9]{2}) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;;
+ s;^[^ ]+ (...) ([0-9]) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;;
+ s;Jan;01;; s;Feb;02;; s;Mar;03;; s;Apr;04;; s;May;05;; s;Jun;06;;
+ s;Jul;07;; s;Aug;08;; s;Sep;09;; s;Oct;10;; s;Nov;11;; s;Dec;12;;' \
+ | xargs -r0 date +%s -ud 2>&-
+ )"
+
+ range="$(HEADER Range |sed -nE 's;^bytes=([0-9]+-[0-9]*|-[0-9]+)$;\1;p;q;')"
+ case "$range" in
+ *-) range="${range}$((file_size - 1))";;
+ -*) [ ${range#-} -le $file_size ] \
+ && range="$((file_size - ${range#-}))-$((file_size - 1))" \
+ || range="0-$((file_size - 1))";;
+ *-*) [ ${range#*-} -ge $file_size ] \
+ && range="${range%-*}-$((file_size - 1))";;
+ esac
+
+ if [ "$file_date" -lt "$cachedate" ] 2>&-; then
+ printf '%s: %s\r\n' \
+ Status '304 Not Modified' \
+ Content-Length 0 \
+ Last-Modified "$http_date"
+ printf '\r\n'
+
+ elif [ -z "$range" ]; then
+ printf '%s: %s\r\n' \
+ Status "200 OK" \
+ Accept-Ranges bytes \
+ Last-Modified "$http_date" \
+ Content-Type "${mime:-$(file_type "$file")}" \
+ Content-Length $file_size
+ printf '\r\n'
+
+ [ "$REQUEST_METHOD" != HEAD ] && cat "$file"
+
+ elif [ "${range%-*}" -le "${range#*-}" ]; then
+ printf '%s: %s\r\n' \
+ Status "206 Partial Content" \
+ Accept-Ranges bytes \
+ Last-Modified "$http_date" \
+ Content-Type "${mime:-$(file_type "$file")}" \
+ Content-Range "bytes ${range}/${file_size}" \
+ Content-Length "$((${range#*-} - ${range%-*} + 1))"
+ printf '\r\n'
+
+ [ "$REQUEST_METHOD" != HEAD ] \
+ && tail -c+$((${range%-*} + 1)) "$file" \
+ | head -c "$((${range#*-} - ${range%-*} + 1))"
+
+ elif [ "${range%-*}" -gt "${range#*-}" ]; then
+ printf '%s: %s\r\n' \
+ Status "216 Range Not Satisfiable" \
+ Content-Length 0 \
+ Content-Range \*/${file_size}
+ printf '\r\n'
+ fi
+}
--- /dev/null
+#!/bin/sed -nEf
+
+:Escapes
+s,\\\\,\\,g; s,\\&,\&,g;
+s,\\<,\<,g; s,\\>,\>,g;
+s,\\",\",g; s,\\',\',g;
+s,\\\[,\[,g; s,\\\],\],g;
+s,\\\.,\.,g; s,\\#,\#,g;
+s,\\,,g;
+
+:CommentHandle
+x; /^<\/!-->/{
+ x; /--]/{
+ H; s;^(.*)--].*$;\1-->;p;
+ g; s;^.*--]([^\n]*)$;\1;
+ x; s;^</!-->\n(.*)\n[^\n]*$;\1;; x;
+ bCommentEnd
+ }
+ p; b;
+}
+x;
+:CommentEnd
+
+:shortcuts
+s;\[hidden[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="hidden" name="\1" value="\2";g;
+s;\[checkbox[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="checkbox" name="\1" value="\2";g;
+s;\[radio[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="radio" name="\1" value="\2";g;
+s;\[submit[ \t]+"([^"]*)"[ \t]+"([^"]*)";[button type="submit" name="\1" value="\2";g;
+s;\[a[ \t]+"([^"]*)";[a href="\1";g;
+s;\[img[ \t]+"([^"]*)"[ \t]+"([^"]*)";[img src="\1" alt="\2";g;
+
+s;\[!([^]\[]*)\];<!\1>;g;
+s;\[!--([^]\[]*)--\];<!--\1-->;g;
+
+:tags
+s;\[([^]\[< \t]+)([^]\[]*)\];<\1>\2</\1>;g;
+t tags;
+
+G;
+:tagclose
+s;^([^]\n]*)\]([^\n]*)\n([^\n]+);\1\3\2;
+t tagclose;
+h; s;^([^\n]*)\n;;; x; s;\n.*$;;;
+
+:tagopen
+s;^([^\[\n]*)\[([^]\[< \t\n]+)([^\n]*);\1<\2>\3\n</\2>;
+t tagopen;
+G; h; s;^[^\n]*\n+;;; x; s;\n.*$;;;
+
+:attribs
+s;class="([^>]+)>[ \t]*\.([^< \t]+);class="\2 \1>;g; t attribs;
+s;(<[^/][^>]*)>[ \t]*\.([^< \t]+);\1 class="\2">;g;
+s;(<[^/][^>]*)>[ \t]*#([^< \t]+);\1 id="\2">;g;
+s;(<[^/][^>]*)>[ \t]*([^ \t=<]+=("[^"]*"|'[^']*'|[^< \t]*));\1 \2>;g;
+t attribs;
+s;(<input ([^>]+ )?type=(radio|"radio"|'radio')( [^>]+)?)>[ \t]*(checked|selected);\1 checked="checked">;g;
+s;(<input ([^>]+ )?type=(checkbox|"checkbox"|'checkbox')( [^>]+)?)>[ \t]*(checked|selected);\1 checked="checked">;g;
+s;(<option( [^>]+)?)>[ \t]*(checked|selected);\1 selected="selected">;g;
+s;(<select( [^>]+)?)>[ \t]*multiple;\1 multiple="multiple">;g;
+t attribs;
+s;(<[^/][^>]*>)[ \t]*\.[ \t];\1;g;
+
+s;(<[^/][^>]*>)[ \t]*;\1;g;
+# s;(<[^/][^>]*)>[ \t]*</[^>]+>;\1/>;g;
+s;(<(br|hr|img|input|link|meta|area|base|col|command|embed|keygen|param|source|track|wbr)[^>]*)>[ \t]*</\1>;\1>;g;
+
+s;<!-->;<!--;;
+
+p; ${g; s;\n+;;g; p;}
--- /dev/null
+#!/bin/sh
+
+# LOGLEVEL 1: Crash condition
+# LOGLEVEL 2: Unexpected condition
+# LOGLEVEL 3: Failed action (i.e. due to config error)
+# LOGLEVEL 4: Debug
+
+[ -n "$include_logging" ] && return 0
+include_logging="$0"
+
+LOGLEVEL="${LOGLEVEL:-3}"
+LOGFILE="${LOGFILE:-/dev/stderr}"
+
+logmsg(){
+ local ll="${1:-3}"
+ shift 1
+ if [ "$ll" -le "$LOGLEVEL" -a "$#" -gt 0 ]; then
+ printf %s\\n "$*" >>"${LOGFILE}"
+ elif [ "$ll" -le "$LOGLEVEL" ]; then
+ tee -a "${LOGFILE}"
+ elif [ ! "$#" -gt 0 ]; then
+ cat
+ fi
+}
+
+die(){
+ [ "$#" -gt 0 ] && logmsg 1 "$@"
+ exit 1
+}
+panic(){ logmsg 2 "$@"; }
+error(){ logmsg 3 "$@"; }
+debug(){ logmsg 4 "$@"; }
--- /dev/null
+#!/bin/awk -f
+#!/opt/busybox/awk -f
+
+# EXPERIMENTAL Markdown processor with minimal dependencies.
+# Meant to support all features of John Grubers basic Markdown
+# + a number of common extensions, mostly inspired by Pandoc Markdown
+#
+# ToDo:
+# - HTML processing / escaping (according to environment flag)
+# - em-dashes and arrows
+
+# Supported Features / TODO:
+# ==========================
+# [x] done [ ] todo [-] not planned ? unsure
+#
+# Basic Markdown - Block elements:
+# -------------------------------
+# - [x] Paragraphs
+# - [x] Double space line breaks
+# - [x] Proper block element nesting
+# - [x] Headings
+# - [x] ATX-Style Headings
+# - [x] Blockquotes
+# - [x] Lists (ordered, unordered)
+# - [x] Code blocks (using indention)
+# - [x] Horizontal rules
+# - [x] Verbatim HTML block (disabled by default)
+#
+# Basic Markdown - Inline elements:
+# ---------------------------------
+# - [x] Links
+# - [x] Reference style links
+# - [x] Emphasis *em*/**strong** (*Asterisk*, _Underscore_)
+# - [x] `code`, also ``code containing `backticks` ``
+# - [x] Images / reference style images
+# - [x] <automatic links>
+# - [x] backslash escapes
+# - [x] Verbatim HTML inline (disabled by default)
+# - [x] HTML escaping
+#
+# NOTE: Set the environment variable MD_HTML=true to enable verbatim HTML
+#
+# Extensions - Block elements:
+# ----------------------------
+# - ? Heading identifiers (php md, pandoc)
+# - [x] Automatic heading identifiers (custom)
+# - [x] Fenced code blocks (php md, pandoc)
+# - [-] Fenced code attributes
+# - [ ] Tables
+# - ? Simple table (pandoc)
+# - ? Multiline table (pandoc)
+# - ? Grid table (pandoc)
+# - ? Pipe table (php md pandoc)
+# - [x] Line blocks (pandoc)
+# - [x] Task lists (pandoc)
+# - [ ] Definition lists (php md, pandoc)
+# - [-] Numbered example lists (pandoc)
+# - [-] Metadata blocks (pandoc)
+# - [-] Fenced Divs (pandoc)
+#
+# Extensions - Inline elements:
+# ----------------------------
+# - [x] Ignore embedded_underscores (php md, pandoc)
+# - [x] ~~strikeout~~ (pandoc)
+# - [x] ^Superscript^ ~Subscript~ (pandoc)
+# - [-] Bracketed spans (pandoc)
+# - [-] Inline attributes (pandoc)
+# - [-] TEX-Math (pandoc)
+# - ? Footnotes (php md)
+# - ? Abbreviations (php md)
+# - ? "Curly quotes" (smartypants)
+# - [ ] em-dashes (--) (smartypants old)
+# - ? ... three-dot ellipsis (smartypants)
+# - [-] en-dash (smartypants)
+# - [ ] Automatic em-dash / en-dash
+# - [ ] Automatic -> Arrows <-
+
+function debug(text) { printf "\n---\n%s\n---\n", text > "/dev/stderr"; }
+
+function HTML ( text ) {
+ gsub( /&/, "\\&", text );
+ gsub( /</, "\\<", text );
+ gsub( />/, "\\>", text );
+ gsub( /"/, "\\"", text );
+ gsub( /'/, "\\'", text );
+ gsub( /\\/, "\\\", text );
+ return text;
+}
+
+function inline( line, LOCAL, len, code, href, guard ) {
+ nu = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\_]|_[[:alnum:]])*" # not underline (except when escaped)
+ na = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\\\*])*" # not asterisk (except when escaped)
+ ieu = "_([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])_" # inner <em> (underline)
+ isu = "__([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])__" # inner <strong> (underline)
+ iea = "\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*" # inner <em> (asterisk)
+ isa = "\\*\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*\\*" # inner <strong> (asterisk)
+
+ if ( line ~ /^$/ ) { # Recursion End
+ return "";
+
+ # omit processing of escaped characters
+ } else if ( line ~ /^\\[]\\`\*_\{\}\(\)#\+-\.![]/) {
+ return substr(line, 2, 1) inline( substr(line, 3) );
+
+ # hard brakes
+ } else if ( match(line, /^ \n/) ) {
+ return "<br />\n" inline( substr(line, RLENGTH + 1) );
+
+ # ``code spans``
+ } else if ( match( line, /^`+/) ) {
+ len = RLENGTH
+ guard = substr( line, 1, len )
+ if ( match(line, guard ".*" guard) ) {
+ code = substr( line, len + 1, match( substr(line, len + 1), guard ) - 1)
+ len = 2 * length(guard) + length(code)
+ # strip single surrounding white spaces
+ code = gensub( / (.*) /, "\\1", "1" , code)
+ # escape HTML within code span
+ gsub( /&/, "\\&", code ); gsub( /</, "\\<", code ); gsub( />/, "\\>", code );
+ return "<code>" code "</code>" inline( substr( line, len + 1 ) )
+ }
+
+ # quick links ("automatic links" in md doc)
+ } else if ( match( line, /^<[a-zA-Z]+:\/\/([-\.[:alnum:]]+)(:[0-9]*)?(\/[^>]*)?>/ ) ) {
+ len = RLENGTH;
+ href = HTML( substr( line, 2, len - 2) );
+ return "<a href=\"" href "\">" href "</a>" inline( substr( line, len + 1) );
+
+ # inline links
+ } else if ( match(line, /^\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/) ) {
+ len = RLENGTH;
+ text = gensub(/^\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\1", "g", line);
+ href = gensub(/^\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\2", "g", line);
+ title = gensub(/^\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\4", "g", line);
+ if ( title ) {
+ return "<a href=\"" HTML(href) "\" title=\"" HTML(title) "\">" inline( text ) "</a>" inline( substr( line, len + 1) );
+ } else {
+ return "<a href=\"" HTML(href) "\">" inline( text ) "</a>" inline( substr( line, len + 1) );
+ }
+
+ # reference style links
+ } else if ( match(line, /^\[([^]]+)\] ?\[([^]]*)\]/ ) ) {
+ len = RLENGTH;
+ text = gensub(/^\[([^\n]+)\] ?\[([^\n]*)\].*/, "\\1", 1, line);
+ id = gensub(/^\[([^\n]+)\] ?\[([^\n]*)\].*/, "\\2", 1, line);
+ if ( ! id ) id = text;
+ if ( rl_href[id] && rl_title[id] ) {
+ return "<a href=\"" rl_href[id] "\" title=\"" rl_title[id] "\">" inline(text) "</a>" inline( substr( line, len + 1) );
+ } else if ( rl_href[id] ) {
+ return "<a href=\"" rl_href[id] "\">" inline(text) "</a>" inline( substr( line, len + 1) );
+ } else {
+ return "" substr(line, 1, len) inline( substr(line, len + 1) );
+ }
+
+ # inline images
+ } else if ( match(line, /^!\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/) ) {
+ len = RLENGTH;
+ text = gensub(/^!\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\1", "g", line);
+ href = gensub(/^!\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\2", "g", line);
+ title = gensub(/^!\[([^]]+)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)/, "\\4", "g", line);
+ if ( title ) {
+ return "<img src=\"" HTML(href) "\" alt=\"" HTML(text) "\" title=\"" HTML(title) "\" />" inline( substr( line, len + 1) );
+ } else {
+ return "<img src=\"" HTML(href) "\" alt=\"" HTML(text) "\" />" inline( substr( line, len + 1) );
+ }
+
+ # reference style images
+ } else if ( match(line, /^!\[([^]]+)\] ?\[([^]]*)\]/ ) ) {
+ len = RLENGTH;
+ text = gensub(/^!\[([^\n]+)\] ?\[([^\n]*)\].*/, "\\1", 1, line);
+ id = gensub(/^!\[([^\n]+)\] ?\[([^\n]*)\].*/, "\\2", 1, line);
+ if ( ! id ) id = text;
+ if ( rl_href[id] && rl_title[id] ) {
+ return "<img src=\"" rl_href[id] "\" alt=\"" HTML(text) "\" title=\"" rl_title[id] "\" />" inline( substr( line, len + 1) );
+ } else if ( rl_href[id] ) {
+ return "<img src=\"" rl_href[id] "\" alt=\"" HTML(text) "\" />" inline( substr( line, len + 1) );
+ } else {
+ return "" substr(line, 1, len) inline( substr(line, len + 1) );
+ }
+
+ # ~~strikeout~~ (pandoc)
+ } else if ( match(line, /^~~([[:graph:]]|[[:graph:]]([^~]|~[^~])*[[:graph:]])~~/) ) {
+ len = RLENGTH;
+ return "<del>" inline( substr( line, 3, len - 4 ) ) "</del>" inline( substr( line, len + 1 ) );
+
+ # ^superscript^ (pandoc)
+ } else if ( match(line, /^\^([^[:space:]^]|\\[ ^])+\^/) ) {
+ len = RLENGTH;
+ return "<sup>" inline( substr( line, 2, len - 2 ) ) "</sup>" inline( substr( line, len + 1 ) );
+
+ # ~subscript~ (pandoc)
+ } else if ( match(line, /^~([^[:space:]~]|\\[ ~])+~/) ) {
+ len = RLENGTH;
+ return "<sub>" inline( substr( line, 2, len - 2 ) ) "</sub>" inline( substr( line, len + 1 ) );
+
+ # ignore embedded underscores (pandoc, php md)
+ } else if ( match(line, "^[[:alnum:]](__|_)") ) {
+ return substr( line, 1, RLENGTH) inline( substr(line, RLENGTH + 1) );
+
+ # __strong__$
+ } else if ( match(line, "^__(([^_[:space:]]|" ieu ")|([^_[:space:]]|" ieu ")(" nu "|" ieu ")*([^_[:space:]]|" ieu "))__$") ) {
+ len = RLENGTH;
+ return "<strong>" inline( substr( line, 3, len - 4 ) ) "</strong>" inline( substr( line, len + 1 ) );
+
+ # __strong__
+ } else if ( match(line, "^__(([^_[:space:]]|" ieu ")|([^_[:space:]]|" ieu ")(" nu "|" ieu ")*([^_[:space:]]|" ieu "))__[[:space:][:punct:]]") ) {
+ len = RLENGTH;
+ return "<strong>" inline( substr( line, 3, len - 5 ) ) "</strong>" inline( substr( line, len) );
+
+ # **strong**
+ } else if ( match(line, "^\\*\\*(([^\\*[:space:]]|" iea ")|([^\\*[:space:]]|" iea ")(" na "|" iea ")*([^\\*[:space:]]|" iea "))\\*\\*") ) {
+ len = RLENGTH;
+ return "<strong>" inline( substr( line, 3, len - 4 ) ) "</strong>" inline( substr( line, len + 1 ) );
+
+ # _em_$
+ } else if ( match(line, "^_(([^_[:space:]]|" isu ")|([^_[:space:]]|" isu ")(" nu "|" isu ")*([^_[:space:]]|" isu "))_$") ) {
+ len = RLENGTH;
+ return "<em>" inline( substr( line, 2, len - 2 ) ) "</em>" inline( substr( line, len + 1 ) );
+
+ # _em_
+ } else if ( match(line, "^_(([^_[:space:]]|" isu ")|([^_[:space:]]|" isu ")(" nu "|" isu ")*([^_[:space:]]|" isu "))_[[:space:][:punct:]]") ) {
+ len = RLENGTH;
+ return "<em>" inline( substr( line, 2, len - 3 ) ) "</em>" inline( substr( line, len ) );
+
+ # *em*
+ } else if ( match(line, "^\\*(([^\\*[:space:]]|" isa ")|([^\\*[:space:]]|" isa ")(" na "|" isa ")*([^\\*[:space:]]|" isa "))\\*") ) {
+ len = RLENGTH;
+ return "<em>" inline( substr( line, 2, len - 2 ) ) "</em>" inline( substr( line, len + 1 ) );
+
+ # Verbatim inline HTML
+ } else if ( AllowHTML && match( line, /^(<!--([^-]|-[^-]|--[^>])*-->|<\?([^\?]|\?[^>])*\?>|<![A-Z][^>]*>|<!\[CDATA\[([^\]]|\][^\]]|\]\][^>])*\]\]>|<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)/) ) {
+ len = RLENGTH;
+ return substr( line, 1, len) inline(substr(line, len + 1));
+
+ # Literal HTML entities
+ } else if ( match( line, /^&([a-zA-Z]{2,32}|#[0-9]{1,7}|#[xX][0-9a-fA-F]{1,6});/) ) {
+ len = RLENGTH;
+ return substr( line, 1, len ) inline(substr(line, len + 1));
+
+ # Escape lone HTML character
+ } else if ( match( line, /^[&<>"']/) ) {
+ return HTML(substr(line, 1, 1)) inline(substr(line, 2));
+
+ # continue walk over string
+ } else {
+ return substr(line, 1, 1) inline( substr(line, 2) );
+ }
+}
+
+function _block( block, LOCAL, st, len, hlvl, htxt, guard, code, indent ) {
+ gsub( /^\n+|\n+$/, "", block );
+
+ if ( block == "" ) {
+ return "";
+
+ # HTML #2 #3 #4 $5
+ } else if ( AllowHTML && match( block, /(^|\n) ? ? ?(<!--([^-]|-[^-]|--[^>])*(-->|$)|<\?([^\?]|\?[^>])*(\?>|$)|<![A-Z][^>]*(>|$)|<!\[CDATA\[([^\]]|\][^\]]|\]\][^>])*(\]\]>|$))/) ) {
+ len = RLENGTH; st = RSTART;
+ return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len));
+
+ # HTML #6
+ } else if ( AllowHTML && match( tolower(block), /(^|\n) ? ? ?<\/?(address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h[123456]|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|nav|noframes|ol|optgroup|option|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)([[:space:]\n>]|\/>)([^\n]|\n[ \t]*[^\n])*(\n[[:space:]]*\n|$)/) ) {
+ len = RLENGTH; st = RSTART;
+ return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len));
+
+ # HTML #1
+ } else if ( AllowHTML && match( tolower(block), /(^|\n) ? ? ?<(script|pre|style)([[:space:]\n>]).*(<\/script>|<\/pre>|<\/style>|$)/) ) {
+ len = RLENGTH; st = RSTART;
+ match( tolower(substr(block, st, len)), /(<\/script>|<\/pre>|<\/style>)/);
+ len = RSTART + RLENGTH;
+ return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len));
+
+ # HTML #7
+ } else if ( AllowHTML && match( block, /^ ? ? ?(<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)([[:space:]]*\n)([^\n]|\n[ \t]*[^\n])*(\n[[:space:]]*\n|$)/) ) {
+ len = RLENGTH; st = RSTART;
+ return substr(block, st, len) _block(substr(block, st + len));
+
+ # Blockquote (leading >)
+ } else if ( match( block, /^> /) ) {
+ match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match(block, /$/);
+ len = RLENGTH; st = RSTART;
+ return "<blockquote>\n" _block( gensub( /(^|\n)> /, "\n", "g", substr(block, 1, st - 1) ) ) "</blockquote>\n\n" \
+ _block( substr(block, st + len) );
+
+ # Line Blocks (pandoc)
+ } else if ( match(block, /^\| [^\n]*(\n|$)(\| [^\n]*(\n|$)|[ \t]+[^\n[:space:]][^\n]*(\n|$))*/) ) {
+ len = RLENGTH; st = RSTART;
+ code = substr(block, 1, len);
+ gsub(/\n[[:space:]]+/, " ", code);
+ gsub(/\n\| /, "\n", code);
+ gsub(/^\| |\n$/, "", code);
+ return "<div class=\"line-block\">" gensub(/\n/, "<br />\n", "g", inline( code )) "</div>\n" \
+ _block( substr( block, len + 1) );
+
+ # Indented Code Block
+ } else if ( match(block, /^( |\t)[^\n]+(\n|$)(( |\t)[^\n]+(\n|$)|[ \t]*(\n|$))*/) ) {
+ len = RLENGTH; st = RSTART;
+ code = substr(block, 1, len);
+ gsub(/(^|\n)( |\t)/, "\n", code);
+ gsub(/^\n|\n+$/, "", code);
+ return "<pre><code>" HTML( code ) "</code></pre>\n" \
+ _block( substr( block, len + 1 ) );
+
+ # Fenced Code Block (pandoc)
+ } else if ( match( block, /^(~~~+|```+)/ ) ) {
+ guard = substr( block, 1, RLENGTH );
+ code = gensub(/^[^\n]+\n/, "", 1, block);
+ if ( match(code, "(^|\n)" guard "+(\n|$)" ) ) {
+ len = RLENGTH; st = RSTART;
+ return "<pre><code>" HTML( substr(code, 1, st - 1) ) "</code></pre>\n" \
+ _block( substr( code, st + len ) );
+ } else {
+ match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match( block, /$/ );
+ len = RLENGTH; st = RSTART;
+ return "<p>" inline( substr(block, 1, st - 1) ) "</p>\n" \
+ _block( substr(block, st + len) );
+ }
+
+ # Unordered list
+ } else if ( match( block, "^ ? ? ?[-+*][ \t]+[^\n]+(\n|$)" \
+ "(([ \t]*\n)* ? ? ?[-+*][ \t]+[^\n]+(\n|$)" \
+ "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
+ "|[^\n]+(\n|$))*" ) ) {
+ list = substr( block, 1, RLENGTH);
+ block = substr( block, RLENGTH + 1);
+ indent = length( gensub(/[-+*][ \t]+[^\n]+.*$/, "", 1, list) );
+
+ gsub("(^|\n) {0," indent "}", "\n", list);
+ return "\n<ul>\n" _list( substr(list, 2) ) "</ul>\n" _block( block );
+
+ # Ordered list
+ } else if ( match( block, "^ ? ? ?([0-9]+|#)\\.[ \t]+[^\n]+(\n|$)" \
+ "(([ \t]*\n)* ? ? ?([0-9]+|#)\\.[ \t]+[^\n]+(\n|$)" \
+ "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
+ "|[^\n]+(\n|$))*" ) ) {
+ list = substr( block, 1, RLENGTH);
+ block = substr( block, RLENGTH + 1);
+ indent = length( gensub(/([0-9]+|#)\.[ \t]+[^\n]+.*$/, "", 1, list) );
+
+ gsub("(^|\n) {0," indent "}", "\n", list);
+ return "\n<ol>\n" _list( substr(list, 2) ) "</ol>\n" _block( block );
+
+ # First Order Heading
+ } else if ( match( block, /^[^\n]+\n===+(\n|$)/ ) ) {
+ len = RLENGTH;
+ HL[1]++; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
+ return "<h1 id=\"" HL[1] " - " HTML(gensub( /\n.*$/, "", "g", block )) "\">" inline( gensub( /\n.*$/, "", "g", block ) ) "</h1>\n\n" \
+ _block( substr( block, len + 1 ) );
+
+ # Second Order Heading
+ } else if ( match( block, /^[^\n]+\n---+(\n|$)/ ) ) {
+ len = RLENGTH;
+ HL[2]++; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
+ return "<h2 id=\"" HL[1] "." HL[2] " - " HTML(gensub( /\n.*$/, "", "g", block )) "\">" inline( gensub( /\n.*$/, "", "g", block ) ) "</h2>\n\n" \
+ _block( substr( block, len + 1) );
+
+ # Nth Order Heading
+ } else if ( match( block, /^#{1,6}[ \t]*[^\n]+([ \t]*#*)(\n|$)/ ) ) {
+ len = RLENGTH;
+ hlvl = length( gensub( /^(#{1,6}).*$/, "\\1", "g", block ) );
+ htxt = gensub(/^#{1,6}[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[^\n#])+)([ \t]*#*)(\n.*)?$/, "\\1", 1, block);
+ HL[hlvl]++; for ( n = hlvl + 1; n < 7; n++) { HL[n] = 0;}
+ hid = HL[1]; for ( n = 2; n <= hlvl; n++) { hid = hid "." HL[n] ; }
+ return "<h" hlvl " id=\"" hid " - " HTML(htxt) "\">" inline( htxt ) "</h" hlvl ">\n\n" \
+ _block( substr( block, len + 1) );
+
+ # Horizontal rule
+ } else if ( match( block, /(^|\n) ? ? ?((\* *){3,}|(- *){3,}|(_ *){3,})($|\n)/) ) {
+ len = RLENGTH; st = RSTART;
+ return _block(substr(block, 1, st - 1)) "<hr />\n" _block(substr(block, st + len));
+
+ # Plain paragraph
+ } else {
+ match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match( block, /$/ );
+ len = RLENGTH; st = RSTART;
+ return "<p>" inline( substr(block, 1, st - 1) ) "</p>\n" \
+ _block( substr(block, st + len) );
+ }
+}
+
+function _list( block, last, LOCAL, p) {
+ if ( ! length(block) ) return "";
+ gsub(/^([-+*]|[0-9]+\.|#\.)( ? ? ?|\t)/, "", block)
+
+ # slice next list item from input
+ if ( match( block, /\n([-+*]|[0-9]+\.|#\.)[ \t]+[^\n]+/) ) {
+ p = substr( block, 1, RSTART);
+ block = substr( block, RSTART + 1);
+ } else {
+ p = block; block = "";
+ }
+ sub( /\n +([-+*]|[0-9]+\.|#\.)/, "\n&", p );
+
+ # if this should be a paragraph item
+ # either previous item (last) or current item (p) contains blank lines
+ if (match(last, /\n[[:space:]]*\n/) || match(p, /\n[[:space:]]*\n/) ) {
+ last = p; p = _block(p);
+ } else {
+ last = p; p = _block(p);
+ sub( /^<p>/, "", p );
+ sub( /<\/p>\n/, "", p );
+ }
+ sub( /\n$/, "", p );
+
+ # Task List (pandoc)
+ if ( p ~ /^\[ \].*/ ) { p = "<input type=checkbox disabled />" substr(p, 4); }
+ else if ( p ~ /^\[[xX]\].*/ ) { p = "<input type=checkbox disabled checked />" substr(p, 4); }
+ else if ( p ~ /^<p>\[ \].*/ ) { p = "<p><input type=checkbox disabled />" substr(p, 7); }
+ else if ( p ~ /^<p>\[[xX]\].*/ ) { p = "<p><input type=checkbox disabled checked />" substr(p, 7); }
+ return "<li>" p "</li>\n" _list( block, last );
+}
+
+BEGIN {
+ # Global Vars
+ file = ""; rl_href[""] = ""; rl_title[""] = "";
+ if (ENVIRON["MD_HTML"] == "true") { AllowHTML = "true"; }
+ HL[1] = 0; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
+
+ # Buffering of full file ist necessary, e.g. to find reference links
+ while (getline) { file = file $0 "\n"; }
+ # Clean up MS-DOS line breaks
+ gsub(/\r\n/, "\n", file);
+
+ # Fill array of reference links
+ f = file; rl_id;
+ re_reflink = "(^|\n) ? ? ?\\[([^]\n]+)\\]: ([^ \t\n]+)(\n?[ \t]+(\"([^\"]+)\"|'([^']+)'|\\(([^)]+)\\)))?(\n|$)";
+ # /(^|\n) ? ? ?\[([^]\n]+)\]: ([^ \t\n]+)(\n?[ \t]+("([^"]+)"|'([^']+)'|\(([^)]+)\)))?(\n|$)/
+ while ( match(f, re_reflink ) ) {
+ rl_id = gensub( re_reflink, "\\2", 1, substr(f, RSTART, RLENGTH) );
+ rl_href[rl_id] = gensub( re_reflink, "\\3", 1, substr(f, RSTART, RLENGTH) );
+ rl_title[rl_id] = gensub( re_reflink, "\\5", 1, substr(f, RSTART, RLENGTH) );
+ f = substr(f, RSTART + RLENGTH);
+ rl_title[rl_id] = substr( rl_title[rl_id], 2, length(rl_title[rl_id]) - 2 );
+ if ( rl_href[rl_id] ~ /<.*>/ ) rl_href[rl_id] = substr( rl_href[rl_id], 2, length(rl_href[rl_id]) - 2 );
+ }
+ # Clear reflinks from File
+ while( gsub(re_reflink, "\n", file ) );
+ # for (n in rl_href) { debug(n " | " rl_href[n] " | " rl_title[n] ); }
+
+ # Run Block Processing -> The Actual Markdown!
+ printf "%s", _block( file );
+}
--- /dev/null
+#!/bin/sh
+
+[ -n "$include_session" ] && return 0
+include_session="$0"
+
+_DATE="$(date +%s)"
+SESSION_TIMEOUT="${SESSION_TIMEOUT:-7200}"
+
+if ! which uuencode >/dev/null; then
+ uuencode() { busybox uuencode "$@"; }
+fi
+if ! which sha256sum >/dev/null; then
+ sha256sum() { busybox sha256sum "$@"; }
+fi
+
+if which openssl >/dev/null; then
+ session_mac(){ { [ $# -gt 0 ] && printf %s "$*" || cat; } | openssl dgst -sha1 -hmac "$(server_key)" -binary |slopecode; }
+else
+ # Gonzo MAC if openssl is unavailable
+ session_mac(){
+ { server_key | dd status=none bs=256 count=1 skip=1
+ { server_key | dd status=none bs=256 count=1
+ [ $# -gt 0 ] && printf %s "$*" || cat
+ } \
+ | sha256sum -;
+ } \
+ | sha256sum | cut -d\ -f1
+ }
+fi
+
+server_key(){
+ IDFILE="${IDFILE:-${_DATA:-.}/serverkey}"
+ if [ "$(stat -c %s "$IDFILE")" -ne 512 ] || ! cat "$IDFILE"; then
+ dd count=1 bs=512 if=/dev/urandom \
+ | tee "$IDFILE"
+ fi 2>&-
+}
+
+slopecode(){
+ # 6-Bit Code that retains sort order of input data, while beeing safe to use
+ # in ascii transmissions, unix file names, HTTP URLs, and HTML attributes
+
+ { [ $# -gt 0 ] && printf %s "$*" || cat; } \
+ | uuencode -m - | sed '
+ 1d;$d;
+ y;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/;0123456789:=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz;
+ '
+}
+
+randomid(){
+ dd bs=12 count=1 if=/dev/urandom 2>&- \
+ | slopecode
+}
+
+timeid(){
+ d=$(($_DATE % 4294967296))
+ { printf "$(
+ printf \\%o \
+ $((d / 16777216 % 256)) \
+ $((d / 65536 % 256)) \
+ $((d / 256 % 256)) \
+ $((d % 256))
+ )"
+ dd bs=8 count=1 if=/dev/urandom 2>&-
+ } | slopecode
+}
+
+transid(){
+ # transaction ID to modify a given file
+ local file="$1"
+ session_mac "$(stat -c %F%i%n%N%s%Y "$file" 2>&-)" "$SESSION_ID"
+}
+
+checkid(){ { [ $# -gt 0 ] && printf %s "$*" || cat; } | grep -m 1 -xE '[0-9a-zA-Z:=]{16}'; }
+
+update_session(){
+ local session sid time sig checksig
+ unset SESSION_KEY SESSION_ID
+
+ read -r sid time sig <<-END
+ $(POST session_key || COOKIE session)
+ END
+
+ checksig="$(session_mac "$sid" "$time")"
+
+ if [ "$checksig" = "$sig" \
+ -a "$time" -ge "$_DATE" \
+ -a "$(checkid "$sid")" ] 2>&-
+ then
+ time=$(( $_DATE + $SESSION_TIMEOUT ))
+ sig="$(session_mac "$sid" "$time")"
+
+ SESSION_KEY="${sid} ${time} ${sig}"
+ SESSION_ID="${sid}"
+ return 0
+ else
+ return 1
+ fi
+
+}
+
+new_session(){
+ local sid time sig
+
+ debug "Setting up new session"
+ sid="$(randomid)"
+ time=$(( $_DATE + $SESSION_TIMEOUT ))
+ sig="$(session_mac "$sid" "$time")"
+
+ SESSION_KEY="${sid} ${time} ${sig}"
+ SESSION_ID="${sid}"
+}
+
+SESSION_BIND() {
+ # Set tamper-proof authenticated cookie
+ local key="$1" value="$2"
+ SET_COOKIE session "$key"="${value} $(session_mac "$value" "$SESSION_ID")" Path="/${_BASE#/}" SameSite=Strict HttpOnly
+}
+
+SESSION_VAR() {
+ # read authenticated cookie
+ # fail if value has been tampered with
+ local key="$1" value sig
+ value="$(COOKIE "$key")"
+ sig="${value##* }" value="${value% *}"
+ if [ "$sig" = "$(session_mac "$value" "$SESSION_ID")" ]; then
+ printf %s\\n "$value"
+ else
+ return 1
+ fi
+}
+
+SESSION_COOKIE() {
+ [ "$1" = new ] && new_session
+ SET_COOKIE 0 session="$SESSION_KEY" Path="/${_BASE#/}" SameSite=Strict HttpOnly
+}
+
+update_session || new_session
+
+[ "$1" = nocookie ] || SESSION_COOKIE
--- /dev/null
+#!/bin/sh
+
+# Copyright 2018, 2019, 2021 Paul Hänsch
+#
+# This is a file format helper, part of CGIlite.
+#
+# CGIlite is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# CGIlite is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with CGIlite. If not, see <http://www.gnu.org/licenses/>.
+
+[ -n "$include_storage" ] && return 0
+include_storage="$0"
+
+CR="\r"
+BR='
+'
+
+LOCK(){
+ local lock="${1}.lock" timeout="${2-20}" block
+
+ if [ \! -w "${lock%/*}" ] || [ -e "$lock" -a \! -f "$lock" ]; then
+ debug "Impossible to get lock: $lock"
+ return 1
+ fi
+
+ while [ $timeout -gt 0 ]; do
+ printf '%i\n' $$ >>"${lock}"
+ read block <"$lock"
+ if [ "$block" = $$ ]; then
+ return 0
+ elif ! { ps -eo pid |grep -qwF "$block"; }; then
+ debug "Trying to override stale lock: $lock"
+ if LOCK "$lock" 1; then
+ rm -- "$lock"
+ RELEASE "$lock"
+ fi
+ else
+ timeout=$((timeout - 1))
+ [ $timeout -gt 0 ] && sleep 1
+ fi
+ done
+
+ debug "Timeout while trying to get lock: $lock"
+ return 1
+}
+
+RELEASE(){
+ local lock="${1}.lock" block
+
+ read block <"$lock"
+ if [ "$block" = $$ ]; then
+ rm -- "$lock"
+ return 0
+ else
+ debug "Refusing to release foreign lock: $lock"
+ return 1
+ fi
+}
+
+STRING(){
+ local in out=''
+ [ $# -gt 0 ] && in="$*" || in="$(cat)"
+ while [ "$in" ]; do case $in in
+ \\*) out="${out}\\\\"; in="${in#\\}" ;;
+ "$BR"*) out="${out}\\n"; in="${in#${BR}}" ;;
+ "$CR"*) out="${out}\\r"; in="${in#${CR}}" ;;
+ " "*) out="${out}\\t"; in="${in# }" ;;
+ +*) out="${out}\\+"; in="${in#+}" ;;
+ " "*) out="${out}+"; in="${in# }" ;;
+ *) out="${out}${in%%[\\${CR}${BR} + ]*}"; in="${in#"${in%%[\\${BR}${CR} + ]*}"}" ;;
+ esac; done
+ printf '%s' "${out:-\\}"
+}
+
+UNSTRING(){
+ local in out=''
+ [ $# -gt 0 ] && in="$*" || in="$(cat)"
+ while [ "$in" ]; do case $in in
+ \\\\*) out="${out}\\"; in="${in#\\\\}" ;;
+ \\n*) out="${out}${BR}"; in="${in#\\n}" ;;
+ \\r*) out="${out}${CR}"; in="${in#\\r}" ;;
+ \\t*) out="${out} "; in="${in#\\t}" ;;
+ \\+*) out="${out}+"; in="${in#\\+}" ;;
+ +*) out="${out} "; in="${in#+}" ;;
+ \\*) in="${in#\\}" ;;
+ *) out="${out}${in%%[\\+]*}"; in="${in#"${in%%[\\+]*}"}" ;;
+ esac; done
+ printf '%s\n' "$out"
+}
+
+DBM() {
+ local file="$1" cmd="$2"
+ local k v key value
+ shift 2;
+
+ case "$cmd" in
+ check|contains)
+ key="$(STRING "$1")"
+ while read -r k v; do if [ "$k" = "$key" ]; then
+ return 0
+ fi; done <"$file" 2>&-
+ return 1
+ ;;
+ get)
+ key="$(STRING "$1")"
+ while read -r k v; do if [ "$k" = "$key" ]; then
+ UNSTRING "$v"
+ return 0
+ fi; done <"$file" 2>&-
+ return 1
+ ;;
+ set|store)
+ key="$(STRING "$1")" value="$(STRING "$2")"
+ LOCK "$file" || return 1
+ { while read -r k v; do
+ [ "$k" = "$key" ] || printf '%s\t%s\n' "$k" "$v"
+ done <"$file" 2>&-
+ printf '%s\t%s\n' "$key" "$value"
+ } >"${file}.$$.tmp"
+ mv "${file}.$$.tmp" "${file}"
+ RELEASE "$file"
+ return 0
+ ;;
+ add|insert)
+ k="$1" key="$(STRING "$1")" value="$(STRING "$2")"
+ LOCK "$file" || return 1
+ if DBM "$file" check "$k"; then
+ RELEASE "$file"
+ return 1
+ else
+ printf '%s\t%s\n' "$key" "$value" >>"${file}"
+ RELEASE "$file"
+ return 0
+ fi
+ ;;
+ update|replace)
+ k="$1" key="$(STRING "$1")" value="$(STRING "$2")"
+ LOCK "$file" || return 1
+ if ! DBM "$file" check "$k"; then
+ RELEASE "$file"
+ return 1
+ fi
+ { while read -r k v; do
+ [ "$k" = "$key" ] \
+ && printf '%s\t%s\n' "$key" "$value" \
+ || printf '%s\t%s\n' "$k" "$v"
+ done <"$file" 2>&-
+ } >"${file}.$$.tmp"
+ mv "${file}.$$.tmp" "${file}"
+ RELEASE "$file"
+ return 0
+ ;;
+ append)
+ key="$(STRING "$1")" value="$(STRING "$2")"
+ LOCK "$file" || return 1
+ if ! DBM "$file" check "$1"; then
+ RELEASE "$file"
+ return 1
+ fi
+ { while read -r k v; do
+ [ "$k" = "$key" ] \
+ && printf '%s\t%s\n' "$key" "$v$value" \
+ || printf '%s\t%s\n' "$k" "$v"
+ done <"$file" 2>&-
+ } >"${file}.$$.tmp"
+ mv "${file}.$$.tmp" "${file}"
+ RELEASE "$file"
+ return 0
+ ;;
+ delete|remove)
+ key="$(STRING "$1")"
+ LOCK "$file" || return 1
+ { while read -r k v; do
+ [ "$k" = "$key" ] || printf '%s\t%s\n' "$k" "$v"
+ done <"$file" 2>&-
+ } >"${file}.$$.tmp"
+ mv "${file}.$$.tmp" "${file}"
+ RELEASE "$file"
+ return 0
+ ;;
+ esac
+}
--- /dev/null
+#!/bin/sh
+
+[ -n "$include_users" ] && return 0
+include_users="$0"
+
+. "${_EXEC}/cgilite/session.sh"
+. "${_EXEC}/cgilite/storage.sh"
+
+USER_REGISTRATION="${USER_REGISTRATION:-true}"
+USER_REQUIREEMAIL="${USER_REQUIREEMAIL:-true}"
+
+HTTP_HOST="$(HEADER Host)"
+MAILFROM="${MAILDOMAIN:-noreply@${HTTP_HOST%:*}}"
+
+# == FILE FORMAT ==
+# UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+# (pending|active|deleted)
+
+# == GLOBALS ==
+UNSET_USER='unset \
+ USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \
+ USER_EXPIRE USER_DEVICES USER_FUTUREUSE
+'
+
+LOCAL_USER='local \
+ USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \
+ USER_EXPIRE USER_DEVICES USER_FUTUREUSE
+'
+
+unset USER_IDMAP
+eval "$UNSET_USER"
+
+user_db="${user_db:-${_DATA}/users.db}"
+
+read_user() {
+ local user="$1"
+
+ # Global exports
+ USER_ID='' USER_NAME='' USER_STATUS='' USER_EMAIL='' USER_PWSALT=''
+ USER_PWHASH='' USER_EXPIRE='' USER_DEVICES='' USER_FUTUREUSE=''
+
+ if [ $# -eq 0 ]; then
+ read -r USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \
+ USER_EXPIRE USER_DEVICES USER_FUTUREUSE
+ elif [ "$user" -a -f "$user_db" -a -r "$user_db" ]; then
+ read -r USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \
+ USER_EXPIRE USER_DEVICES USER_FUTUREUSE <<-EOF
+ $(grep "^${user} " "${user_db}")
+ EOF
+ fi
+ if [ "$USER_ID" -a "${USER_EXPIRE:-0}" -gt "$_DATE" ]; then
+ USER_NAME="$(UNSTRING "$USER_NAME")"
+ USER_EMAIL="$(UNSTRING "$USER_EMAIL")"
+ USER_DEVICES="$(UNSTRING "$USER_DEVICES")"
+ unset USER_PWSALT USER_PWHASH
+ else
+ eval "$UNSET_USER"
+ return 1
+ fi
+}
+
+update_user() {
+ # internal function for user update
+ local uid="$1" uname status email pwsalt pwhash expire devices futureuse
+ local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+ local arg
+
+ for arg in "$@"; do case $arg in
+ uname=*) uname="${arg#*=}";;
+ status=*) status="${arg#*=}";;
+ email=*) email="${arg#*=}";;
+ password=*) pwsalt="$(randomid)"; pwhash="$(user_pwhash "$pwsalt" "${arg#*=}")";;
+ expire=*) expire="${arg#*=}";;
+ devices=*) devices="${arg#*=}";;
+ esac; done
+
+ if LOCK "$user_db"; then
+ while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES \
+ FUTUREUSE; do
+ if [ "$UID" = "$uid" ]; then
+ printf '%s %s %s %s %s %s %i %s %s\n' \
+ "$uid" "$(STRING "${uname-$(UNSTRING "$UNAME")}")" \
+ "${status:-${status-${STATUS}}${status+\\}}" \
+ "${email:-${email-${EMAIL}}${email+\\}}" \
+ "${pwsalt:-${PWSALT}}" "${pwhash:-${PWHASH}}" \
+ "${expire:-$((_DATE + 86400 * 730))}" \
+ "$(STRING "${devices-$(UNSTRING "$DEVICES")}")" \
+ "${FUTUREUSE:-\\}"
+ elif [ "$STATUS" = pending -a ! "$EXPIRE" -ge "$_DATE" ]; then
+ # omit expired invitations from output
+ :
+ else
+ printf '%s %s %s %s %s %s %i %s %s\n' \
+ "$UID" "$UNAME" "$STATUS" "$EMAIL" "$PWSALT" "$PWHASH" \
+ "$EXPIRE" "$DEVICES" "$FUTUREUSE"
+ fi
+ done <"$user_db" >"${user_db}.$$"
+ mv -- "${user_db}.$$" "$user_db"
+ RELEASE "$user_db"
+ else
+ return 1
+ fi
+}
+
+new_user(){
+ local user="${1:-$(timeid)}"
+ shift 1
+
+ if LOCK "$user_db"; then
+ if grep -q "^${user} " "$user_db"; then
+ RELEASE "$user_db"
+ return 1
+ fi
+ printf '%s \\ %s \\ \\ \\ %i \\ \\\n' \
+ "$user" "pending" "$(( $_DATE + 86400 ))" >>"$user_db"
+ else
+ return 1
+ fi
+
+ if [ $# -eq 0 ]; then
+ RELEASE "$user_db"
+ return 0
+ elif update_user "$user" "$@"; then
+ return 0
+ else
+ RELEASE "$user_db"
+ return 1
+ fi
+}
+
+user_idmap(){
+ local uid="$1" ret
+ eval "$LOCAL_USER"
+
+ if [ ! "$USER_IDMAP" ]; then
+ while read_user; do
+ USER_IDMAP="${USER_IDMAP}${USER_ID} ${USER_NAME}${BR}"
+ done <"$user_db"
+ fi
+ if [ "$uid" -a "$USER_IDMAP" != "${USER_IDMAP##*${uid} }" ]; then
+ ret="${USER_IDMAP##*${uid} }"; ret="${ret%%${BR}*}";
+ printf '%s\n' "$ret"
+ return 0
+ elif [ "$uid" ]; then
+ return 1
+ else
+ printf '%s' "$USER_IDMAP"
+ return 0
+ fi
+}
+
+user_idof(){
+ local name="$(STRING "$1")" ret
+ [ "$USER_IDMAP" ] || user_idmap >/dev/null
+
+ if [ "${name%\\}" -a "$USER_IDMAP" != "${USER_IDMAP% ${name}${BR}*}" ]; then
+ ret="${USER_IDMAP% ${name}${BR}*}"; ret="${ret##*${BR}}"
+ printf '%s\n' "$ret"
+ return 0
+ else
+ return 1
+ fi
+}
+
+user_checkname(){
+ { [ $# -gt 0 ] && printf %s "$*" || cat; } \
+ | sed -nE '
+ :X; $!{N;bX;}
+ s;[ \t\r\n]+; ;g;
+ s;^ ;;; s; $;;;
+ /@/d;
+ /^[a-zA-Z][a-zA-Z0-9 -~]{2,127}$/!d;
+ p;
+ '
+}
+
+user_checkemail(){
+ { [ $# -gt 0 ] && printf %s "$*" || cat; } \
+ | sed -nE '
+ # W3C recommended email regex
+ # https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email)
+ /^[a-zA-Z0-9.!#$%&'\''*+\/=?^_`{|}~-]+@[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/p;
+ '
+}
+
+user_nameexist(){
+ local uname="$(STRING "$1")"
+ local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+ [ -f "$user_db" -a -r "$user_db" ] \
+ && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do
+ [ "$EXPIRE" -gt "$_DATE" -a "$UNAME" = "$uname" ] && return 0
+ done <"$user_db"
+ return 1
+}
+
+user_emailexist(){
+ local email="$(STRING "$1")"
+ local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+ [ -f "$user_db" -a -r "$user_db" ] \
+ && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do
+ [ "$EXPIRE" -gt "$_DATE" -a "$EMAIL" = "$email" ] && return 0
+ done <"$user_db"
+ return 1
+}
+
+user_pwhash(){
+ local salt="$1" secret="$2" hash
+ hash="$(printf '%s\n%s\n' "$secret" "$salt" |sha256sum)"
+ printf '%s\n' "${hash%% *}"
+}
+
+user_register(){
+ # reserve account, send registration mail
+ # preliminary uid, expiration, signature
+ local uid="$(timeid)"
+ local uname="$(POST uname |user_checkname)"
+ local email="$(POST email |user_checkemail)"
+ local pwsalt="$(randomid)"
+ local pw="$(POST pw |grep -m1 -xE '.{6,}' )" pwconfirm="$(POST pwconfirm)"
+
+ if [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_REGISTRATION_DISABLED"
+ fi
+
+ if [ "$USER_REQUIREEMAIL" = true ]; then
+ if [ ! "email" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID"
+ elif user_emailexist "$email"; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS"
+ elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then
+ debug "Sending Activation Link:" \
+ "https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
+ sendmail -t -f "$MAILFROM" <<-EOF
+ From: ${MAILFROM}
+ To: ${email}
+ Subject: Your account registration at ${HTTP_HOST%:*}
+
+ Someone tried to sign up for a user account using this email address.
+
+ You can activate your account using this link:
+
+ https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
+
+ This registration link will expire after 24 hours.
+
+ If you did not request an account at ${HTTP_HOST%:*}, then someone else
+ probably entered your email address by accident. In this case you shoud
+ simply ignore this message and we will remove your email address from
+ our database within the next day.
+
+ This is an automatic email. Any direct reply will not be received.
+ Your Account Registration Robot.
+ EOF
+ REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
+ else
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
+ fi
+
+ elif [ "$USER_REQUIREEMAIL" != true ]; then
+ if [ ! "$uname" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_UNAME_INVALID"
+ elif user_nameexist "$uname"; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_UNAME_EXISTS"
+ elif [ ! "$pw" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_EMPTYTOOSHORT"
+ elif [ "$pw" != "$pwconfirm" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_MISMATCH"
+ elif new_user "$uid" uname="$uname" status=active email="$email" password="$pw" expire="$((_DATE + 86400 * 730))"; then
+ SESSION_COOKIE new
+ SESSION_BIND user_id "$uid"
+
+ REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
+ else
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
+ fi
+ fi
+}
+
+user_invite(){
+ local uid="$(timeid)"
+ local email="$(POST email |user_checkemail)"
+ local message="$(POST message)"
+
+ if [ ! "email" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID"
+ elif user_emailexist "$email"; then
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS"
+ elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then
+ debug "Sending Invitation Link:" \
+ "https://${HTTP_HOST}${BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")"
+ sendmail -t -f "$MAILFROM" <<-EOF
+ From: ${MAILFROM}
+ To: ${email}
+ Subject: You have been invited to ${HTTP_HOST%:*}
+
+ ${USER_NAME:-Someone} has offered an invitation to this email address.
+
+ ${message}
+
+ You can create your account using this link:
+
+ https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")
+
+ This registration link will expire after 24 hours.
+
+ If you do not know what this is about, then someone else probably
+ entered your email address by accident. In this case you shoud
+ simply ignore this message and we will remove your email address from
+ our database within the next day.
+
+ This is an automatic email. Any direct reply will not be received.
+ Your Account Registration Robot.
+ EOF
+ REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM"
+ else
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
+ fi
+}
+
+user_confirm(){
+ # enable account
+ eval "$LOCAL_USER"
+ local uid="$(POST uid |checkid || printf invalid)"
+ local signature="$(POST signature)"
+ local uname="$(POST uname |user_checkname)"
+ local pwsalt="$(randomid)"
+ local pw="$(POST pw |grep -m1 -xE '.{6,}' )" pwconfirm="$(POST pwconfirm)"
+
+ read_user "${uid}"
+
+ if [ "$signature" != "$(session_mac "$uid")" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_LINK_INVALID"
+ elif [ ! "$uname" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_UNAME_INVALID"
+ elif user_nameexist "$uname"; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_UNAME_EXISTS"
+ elif [ ! "$pw" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_PW_EMPTYTOOSHORT"
+ elif [ "$pw" != "$pwconfirm" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_PW_MISMATCH"
+ elif [ "$USER_STATUS" != pending -o \! "$USER_EXPIRE" -gt "$_DATE" ]; then
+ REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_LINK_INVALID"
+ elif update_user "$USER_ID" uname="$uname" status=active password="$pw"; then
+ SESSION_COOKIE new
+ SESSION_BIND user_id "$USER_ID"
+ REDIRECT "${_BASE}${PATH_INFO}?user_register=confirm#USER_REGISTER_CONFIRM"
+ else
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK"
+ fi
+}
+
+user_login(){
+ # set cookie
+ # keep logged in - device cookie?
+ # initialize new session!
+ local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+ local uname="$(POST uname |STRING)" pw="$(POST pw)"
+
+ [ -f "$user_db" -a -r "$user_db" ] \
+ && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do
+ if [ "$UNAME" = "$uname" -o "$EMAIL" = "$uname" ]; then
+ if [ "$STATUS" = active -a "$EXPIRE" -gt "$_DATE" -a "$PWHASH" = "$(user_pwhash "$PWSALT" "$pw")" ]; then
+ SESSION_COOKIE new
+ SESSION_BIND user_id "$UID"
+ REDIRECT "${_BASE}${PATH_INFO}#USER_LOGGED_IN"
+ fi
+ fi
+ done <"$user_db"
+ REDIRECT "${_BASE}${PATH_INFO}#ERROR_INVALID_LOGIN"
+}
+
+user_logout(){
+ # destroy cookie, destroy session
+ # keep device cookie
+ new_session
+ SESSION_COOKIE new
+ SET_COOKIE 0 user_id="" Path="/${_BASE#/}" SameSite=Strict HttpOnly
+ REDIRECT "${_BASE}${PATH_INFO}#USER_LOGGED_OUT"
+}
+
+user_update(){
+ # passphrase, email
+ :
+}
+user_recover(){
+ # send recover link
+ :
+}
+user_disable(){
+ :
+}
+
+read_user "$(SESSION_VAR user_id)"
+[ "$USER_STATUS" -a "$USER_STATUS" != active ] && eval $UNSET_USER
+
+[ "$REQUEST_METHOD" = POST ] && case "$(POST action)" in
+ user_register) user_register ;;
+ user_confirm) user_confirm ;;
+ user_invite) user_invite ;;
+ user_login) user_login ;;
+ user_logout) user_logout ;;
+ user_update)
+ :;;
+ user_recover)
+ :;;
+ user_disable)
+ :;;
+esac
+
+w_user_register(){
+ if [ "$(GET user_confirm)" ]; then
+ w_user_confirm
+ elif [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then
+ cat <<-EOF
+ [div #user_register .disabled
+ User Registration is disabled.
+ ]
+ EOF
+ elif [ "$USER_REQUIREEMAIL" = true ]; then
+ cat <<-EOF
+ [form #user_register .registeremail method=POST
+ [p We will send an activation mail to your email address.
+ You can continue the signup process when you click on the
+ activation link in this email.]
+ [input type=email name=email placeholder="Email"]
+ [submit "action" "user_register" Sign Up]
+ ]
+ EOF
+ elif [ "$USER_REQUIREEMAIL" != true ]; then
+ cat <<-EOF
+ [form #user_register .registername method=POST
+ [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off]
+ [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"]
+ [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"]
+ [submit "action" "user_register" Sign Up]
+ ]
+ EOF
+ fi
+}
+
+w_user_confirm(){
+ local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE
+ local user_confirm="$(GET user_confirm)"
+ local uid="${user_confirm% *}" signature="${user_confirm#* }"
+
+ if [ "$signature" = "$(session_mac "$uid")" ]; then
+ read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE <<-EOF
+ $(grep "^${uid} " "$user_db")
+ EOF
+ if [ "$STATUS" = pending -a "$EXPIRE" -gt "$_DATE" ]; then
+ cat <<-EOF
+ [form #user_confirm method=POST
+ [input type=hidden name=uid value="${uid}"]
+ [input type=hidden name=signature value="${signature}"]
+ [input disabled=disabled value="$(HTML "$EMAIL")"]
+ [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off]
+ [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"]
+ [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"]
+ [submit "action" "user_confirm" Finish Registration]
+ ]
+ EOF
+ else
+ cat <<-EOF
+ [div #user_confirm .expired
+ [p This activation link is not valid anymore.]
+ ]
+ EOF
+ fi
+ else
+ cat <<-EOF
+ [div #user_confirm .invalid
+ [p This activation link is invalid. Make sure you copied the whole activation link from your email and be careful not to include any line breaks.]
+ ]
+ EOF
+ fi
+}
+
+w_user_invite(){
+ if [ "$(GET user_confirm)" ]; then
+ w_user_confirm
+ elif [ "$USER_ID" ]; then
+ cat <<-EOF
+ [form #user_invite method=POST
+ [input placeholder="Email Recipient" name=email autocomplete=off]
+ [textarea name="message" placeholder="Message to recipient" . ]
+ [submit "action" "user_invite" Send Invitation]
+ ]
+ EOF
+ else
+ cat <<-EOF
+ [div #user_invite .notallowed
+ Only registered users may send an invitation to another user.
+ ]
+ EOF
+ fi
+}
+
+w_user_login(){
+ if [ ! "$USER_ID" ]; then
+ cat <<-EOF
+ [form #user_login .login method=POST
+ [input name=uname placeholder="Username or Email" autocomplete=off]
+ [input type=password name=pw placeholder="Passphrase"]
+ [submit "action" "user_login" Login]
+ ]
+ EOF
+ elif [ "$USER_ID" ]; then
+ cat <<-EOF
+ [form #user_login .logout method=POST
+ [p Logged in as [span . $(HTML ${USER_NAME})]]
+ [submit "action" "user_logout" Logout]
+ ]
+ EOF
+ fi
+}
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