Files: 02044cb4be75b9a46439f79179efc828aceb7d50 / gemini.filter.dpi
3294 bytesRaw
| 1 | #!/bin/bash |
| 2 | # dillo-gemini |
| 3 | # © 2019 cel @f/6sQ6d2CMxRUhLpspgGIulDxDCwYD7DzFzPNr7u5AU=.ed25519 |
| 4 | # Copying and distribution of this file, with or without modification, |
| 5 | # are permitted in any medium without royalty provided the copyright |
| 6 | # notice and this notice are preserved. This file is offered as-is, |
| 7 | # without any warranty. |
| 8 | |
| 9 | read -d '>' auth |
| 10 | read -d '>' cmd |
| 11 | case "$cmd" in |
| 12 | "<cmd='open_url' url='"*);; |
| 13 | *) echo $cmd; exit;; |
| 14 | esac |
| 15 | url=${cmd#"<cmd='open_url' url='"} |
| 16 | url=${url%"' '"} |
| 17 | |
| 18 | serve_404() { |
| 19 | printf "<cmd='start_send_page' url='' '>\n" |
| 20 | printf "Content-type: text/plain\r\n\r\n" |
| 21 | echo Not found |
| 22 | } |
| 23 | |
| 24 | render_gemini() { |
| 25 | printf "Content-type: text/html\r\n\r\n" |
| 26 | if which ansi2html 2>&1 >/dev/null |
| 27 | then |
| 28 | ansi2html | sed 's/^\(=>\s*\)\(\S*\)*\(.*\)/\1<a href="\2">\2<\/a>\3/' |
| 29 | else |
| 30 | printf "<!doctype html><pre>" |
| 31 | sed 's/^\(=>\s*\)\(\S*\)*\(.*\)/\1<a href="\2">\2<\/a>\3/' |
| 32 | printf "%s" "</pre>" |
| 33 | fi |
| 34 | } |
| 35 | |
| 36 | send_status_msg() { |
| 37 | printf "<cmd='send_status_message' msg='%s' '>" "$*" |
| 38 | } |
| 39 | |
| 40 | serve_status_not_supported() { |
| 41 | printf "<cmd='start_send_page' url='' '>\n" |
| 42 | printf "Content-type: text/plain\r\n\r\n" |
| 43 | echo Status not implemented: $1 |
| 44 | echo $2 |
| 45 | } |
| 46 | |
| 47 | serve_missing_status() { |
| 48 | printf "<cmd='start_send_page' url='' '>\n" |
| 49 | printf "Content-type: text/plain\r\n\r\n" |
| 50 | echo Empty status response. $2 |
| 51 | } |
| 52 | |
| 53 | serve_success() { |
| 54 | printf "<cmd='start_send_page' url='' '>\n" |
| 55 | type=$1 |
| 56 | case "$type" in |
| 57 | text/gemini*) render_gemini;; |
| 58 | *) printf "Content-type: $type\r\n\r\n"; cat;; |
| 59 | esac |
| 60 | } |
| 61 | |
| 62 | serve_redirect() { |
| 63 | url=$1 |
| 64 | send_status_msg "Redirected" |
| 65 | printf "<cmd='start_send_page' url='' '>\n" |
| 66 | printf "Content-type: text/html\r\n\r\n" |
| 67 | # TODO: html-escape url |
| 68 | cat <<-EOF |
| 69 | <!doctype html> |
| 70 | <html> |
| 71 | <head> |
| 72 | <title>Redirect to $url</title> |
| 73 | </head> |
| 74 | <body> |
| 75 | <h3>Redirect to <a href="$url">$url</a></3> |
| 76 | </body> |
| 77 | </html> |
| 78 | EOF |
| 79 | } |
| 80 | |
| 81 | serve_error() { |
| 82 | status=$1 |
| 83 | meta=$2 |
| 84 | send_status_msg "Request failed" |
| 85 | printf "<cmd='start_send_page' url='' '>\n" |
| 86 | printf "Content-type: text/html\r\n\r\n" |
| 87 | cat <<-EOF |
| 88 | <!doctype html> |
| 89 | <html> |
| 90 | <head> |
| 91 | <title>Request failed</title> |
| 92 | </head> |
| 93 | <body> |
| 94 | <h3>Request failed: $status</h3> |
| 95 | <code>$meta</code> |
| 96 | </body> |
| 97 | </html> |
| 98 | EOF |
| 99 | } |
| 100 | |
| 101 | serve_fail() { |
| 102 | meta="$1" |
| 103 | send_status_msg "Client certificate required" |
| 104 | printf "<cmd='start_send_page' url='' '>\n" |
| 105 | printf "Content-type: text/html\r\n\r\n" |
| 106 | cat <<-EOF |
| 107 | <!doctype html> |
| 108 | <html> |
| 109 | <head> |
| 110 | <title>Client certificate required</title> |
| 111 | </head> |
| 112 | <body> |
| 113 | <h3>Client certificate required</h3> |
| 114 | <p>Not implemented!</p> |
| 115 | <code>$meta</code> |
| 116 | </body> |
| 117 | </html> |
| 118 | EOF |
| 119 | } |
| 120 | |
| 121 | serve_gemini() { |
| 122 | url=$1 |
| 123 | url1=${url#gemini://} |
| 124 | hostname=${url1%%/*} |
| 125 | host=${hostname%%:*} |
| 126 | port=${hostname##*:} |
| 127 | if [ "$host" = "$port" ]; then port=1965; fi |
| 128 | send_status_msg "Sending request..." |
| 129 | printf "%s\r\n" "$url" | openssl s_client -verify_quiet -quiet "$host:$port" | { |
| 130 | read status meta |
| 131 | send_status_msg "Status: $status" |
| 132 | meta=$(echo "$meta" | sed 's/\s*$//') |
| 133 | case "$status" in |
| 134 | 1*) serve_input "$meta";; |
| 135 | 2*) serve_success "$meta";; |
| 136 | 3*) serve_redirect "$meta";; |
| 137 | 4*) serve_error "$status" "$meta";; |
| 138 | 5*) serve_error "$meta";; |
| 139 | 6*) serve_client_cert_required "$meta";; |
| 140 | '') serve_missing_status "$meta";; |
| 141 | *) serve_status_not_supported "$status" "$meta";; |
| 142 | esac |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | case "$url" in |
| 147 | gemini:*) serve_gemini "$url";; |
| 148 | *) serve_404;; |
| 149 | esac |
| 150 |
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