108 lines
2.6 KiB
Bash
Executable File
108 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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set -e
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ADDR=127.0.0.1
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PORT=1234
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ROOT="$(realpath "${1:-$PWD}")"
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CR=$'\r'
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LF=$'\n'
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tmpdir="$(mktemp -d)"
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trap 'rm -r "$tmpdir"' EXIT
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trap 'exit' INT
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error() {
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code="$1"
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head="$2"
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message="$3"
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echo "HTTP/1.0 $code $head$CR"
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echo "Content-Type: text/plain$CR"
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echo "Connection: close$CR"
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echo "$CR"
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echo "$code $head$CR"
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echo "$CR"
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echo "$message"
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exit
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}
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handle() {
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connection_id="$1"
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response_pipe="$tmpdir/response-$connection_id.pipe"
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event_pipe="$tmpdir/event-$connection_id.pipe"
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mkfifo -m 0600 "$response_pipe" "$event_pipe"
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gnetcat --listen --source "$ADDR" --local-port "$PORT" --close < "$response_pipe" | sed -E -u 's/\r$//' | (
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read method url version || {
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echo "Connection broken" > "$event_pipe"
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exit
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}
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cat >& /dev/null & # read but ignore headers and whatever else
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echo "$method $url" > "$event_pipe"
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if ! [ "$version" = "HTTP/1.0" -o "$version" = "HTTP/1.1" ]; then
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error 505 'HTTP Version Not Supported' "Version $version is not supported.${LF}Only 1.0 is really supported."
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fi
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if ! [ "$method" = "GET" ]; then
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error 501 'Not Implemented' "Method $method is not implemented.${LF}Only GET is supported."
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fi
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url="$(echo "$url" | urlencode -d)"
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if ! echo "$url" | grep -q '^/'; then
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error 400 'Bad Request' "URL must be host-relative"
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fi
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if echo "$url" | grep -q '/\.'; then
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error 403 'Forbidden' "Dot-files are forbidden"
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fi
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target="$ROOT$url"
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name=$(basename "$url")
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if [ -f "$target" ]; then
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echo "HTTP/1.0 200 OK$CR"
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echo "Connection: close$CR"
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echo "$CR"
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cat "$target"
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exit
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fi
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if [ -d "$target" ]; then
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if ! echo "$url" | grep -q '/$'; then
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echo "HTTP/1.0 307 Temporary Redirect$CR"
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echo "Connection: close$CR"
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echo "Location: $url/$CR"
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exit
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fi
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ls "$target" 2>/dev/null | {
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echo "HTTP/1.0 200 OK$CR"
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echo "Content-Type: text/html; charset=utf-8$CR"
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echo "Connection: close$CR"
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echo "$CR"
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echo "<!DOCTYPE html>"
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echo "<title>Directory listing for $url</title>"
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echo "<h1>$name</h1>"
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echo "<p><a href=\"..\">up</a>"
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echo "<ul>"
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while read entry; do
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if [ -d "$target$entry" ]; then
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entry="$entry/";
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elif [ -f "$target$entry" ]; then
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true
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else
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continue
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fi
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echo "<li><a href=\"$entry\">$entry</a>"
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done
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echo "</ul>"
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} || error 403 'Forbidden' "Permission denied for $url"
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exit
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fi
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error 404 'Not Found' "Requested file $url is not found"
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) > "$response_pipe" &
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rm "$response_pipe"
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cat "$event_pipe"
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rm "$event_pipe"
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}
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echo "Listening at $ADDR:$PORT"
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echo "Serving $ROOT"
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for((i=0;;i++)); do
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handle $i
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done
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