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|
#!/bin/bash
# dillo-gemini
# © 2019 cel @f/6sQ6d2CMxRUhLpspgGIulDxDCwYD7DzFzPNr7u5AU=.ed25519
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved. This file is offered as-is,
# without any warranty.
read -d '>' auth
read -d '>' cmd
case "$cmd" in
"<cmd='open_url' url='"*);;
*) echo $cmd; exit;;
esac
url=${cmd#"<cmd='open_url' url='"}
url=${url%"' '"}
serve_404() {
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/plain\r\n\r\n"
echo Not found
}
render_gemini() {
printf "Content-type: text/html\r\n\r\n"
if which ansi2html 2>&1 >/dev/null
then
ansi2html | sed 's/^\(=>\s*\)\(\S*\)*\(.*\)/\1<a href="\2">\2<\/a>\3/'
else
printf "<!doctype html><pre>"
sed 's/^\(=>\s*\)\(\S*\)*\(.*\)/\1<a href="\2">\2<\/a>\3/'
printf "%s" "</pre>"
fi
}
send_status_msg() {
printf "<cmd='send_status_message' msg='%s' '>" "$*"
}
serve_status_not_supported() {
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/plain\r\n\r\n"
echo Status not implemented: $1
echo $2
}
serve_missing_status() {
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/plain\r\n\r\n"
echo Empty status response. $2
}
serve_success() {
printf "<cmd='start_send_page' url='' '>\n"
type=$1
case "$type" in
text/gemini*) render_gemini;;
*) printf "Content-type: $type\r\n\r\n"; cat;;
esac
}
serve_redirect() {
url=$1
send_status_msg "Redirected"
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/html\r\n\r\n"
# TODO: html-escape url
cat <<-EOF
<!doctype html>
<html>
<head>
<title>Redirect to $url</title>
</head>
<body>
<h3>Redirect to <a href="$url">$url</a></3>
</body>
</html>
EOF
}
serve_error() {
status=$1
meta=$2
send_status_msg "Request failed"
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/html\r\n\r\n"
cat <<-EOF
<!doctype html>
<html>
<head>
<title>Request failed</title>
</head>
<body>
<h3>Request failed: $status</h3>
<code>$meta</code>
</body>
</html>
EOF
}
serve_fail() {
meta="$1"
send_status_msg "Client certificate required"
printf "<cmd='start_send_page' url='' '>\n"
printf "Content-type: text/html\r\n\r\n"
cat <<-EOF
<!doctype html>
<html>
<head>
<title>Client certificate required</title>
</head>
<body>
<h3>Client certificate required</h3>
<p>Not implemented!</p>
<code>$meta</code>
</body>
</html>
EOF
}
serve_gemini() {
url=$1
url1=${url#gemini://}
hostname=${url1%%/*}
host=${hostname%%:*}
port=${hostname##*:}
if [ "$host" = "$port" ]; then port=1965; fi
send_status_msg "Sending request..."
printf "%s\r\n" "$url" | openssl s_client -verify_quiet -quiet "$host:$port" | {
read status meta
send_status_msg "Status: $status"
meta=$(echo "$meta" | sed 's/\s*$//')
case "$status" in
1*) serve_input "$meta";;
2*) serve_success "$meta";;
3*) serve_redirect "$meta";;
4*) serve_error "$status" "$meta";;
5*) serve_error "$meta";;
6*) serve_client_cert_required "$meta";;
'') serve_missing_status "$meta";;
*) serve_status_not_supported "$status" "$meta";;
esac
}
}
case "$url" in
gemini:*) serve_gemini "$url";;
*) serve_404;;
esac
|
