78 lines
2.0 KiB
Nix
78 lines
2.0 KiB
Nix
{ config, lib, pkgs, ... }:
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with import <stockholm/lib>;
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let
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cfg = config.krebs.go;
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out = {
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options.krebs.go = api;
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config = lib.mkIf cfg.enable imp;
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};
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api = {
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enable = mkEnableOption "Enable go url shortener";
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port = mkOption {
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type = types.int;
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default = 1337;
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description = "on which port go should run on";
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};
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};
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imp = {
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services.redis = {
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enable = true;
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};
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krebs.htgen.go = {
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port = cfg.port;
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script = ''. ${pkgs.writeDash "go" ''
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set -x
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case "$Method $Request_URI" in
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"GET /"*)
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if item=$(${pkgs.redis}/bin/redis-cli --raw get "''${Request_URI#/}"); then
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printf 'HTTP/1.1 302 Found\r\n'
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printf 'Content-Type: text/plain\r\n'
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printf 'Connection: closed\r\n'
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printf 'Location: %s\r\n' "$item"
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printf '\r\n'
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exit
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fi
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;;
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"POST /")
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uri_candidate=$(head -c "$req_content_length" \
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| sed 's/+/ /g;s/%\(..\)/\\x\1/g;' \
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| xargs -0 echo -e \
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)
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if $(echo "$uri_candidate" | grep -q '^uri=//.*'); then
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# fix urls with missing https: in front
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uri_candidate=$(echo "$uri_candidate" | sed 's,//,https://,g')
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fi
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uri=$(echo "$uri_candidate" | ${pkgs.urix}/bin/urix \
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| head -1 \
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)
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sha256=$(echo "$uri" | sha256sum -b | cut -d\ -f1)
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base32=$(${pkgs.nixStable}/bin/nix-hash --to-base32 --type sha256 "$sha256")
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base32short=$(echo "$base32" | cut -c48-52)
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${pkgs.redis}/bin/redis-cli set "$base32short" "$uri" >/dev/null
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ref="http://$req_host/$base32short"
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printf 'HTTP/1.1 200 OK\r\n'
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printf 'Content-Type: text/plain; charset=UTF-8\r\n'
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printf 'Connection: close\r\n'
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printf '\r\n'
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printf '%s\n' "$ref"
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exit
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;;
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esac
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''}'';
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};
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};
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in out
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