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