go: store urls in redis

krebs/3modules/go.nix

@@ -20,61 +20,41 @@ let
   };
 
   imp = {
+    services.redis = {
+      enable = true;
+    };
+
     krebs.htgen.go = {
       port = cfg.port;
       script = ''. ${pkgs.writeDash "go" ''
-        find_item() {
-          if test ''${#1} -ge 7; then
-            set -- "$(find "$STATEDIR/items" -mindepth 1 -maxdepth 1 \
-                -regex "$STATEDIR/items/$1[0-9A-Za-z]*$")"
-            if test -n "$1" && test $(echo "$1" | wc -l) = 1; then
-              echo "$1"
-              return 0
-            fi
-          fi
-          return 1
-        }
-
-        STATEDIR=$HOME
-        mkdir -p "$STATEDIR/items"
+        set -x
 
         case "$Method $Request_URI" in
           "GET /"*)
-            if item=$(find_item "''${Request_URI#/}"); then
-              uri=$(cat "$item")
+            if item=$(${pkgs.redis}/bin/redis-cli --raw get "''${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' "$uri"
+              printf 'Location: %s\r\n' "$item"
               printf '\r\n'
               exit
             fi
           ;;
           "POST /")
-            uri=$(mktemp -t htgen.$$.content.XXXXXXXX)
-            trap 'rm $uri >&2' EXIT
-
-            head -c "$req_content_length" \
+            uri=$(head -c "$req_content_length" \
               | sed 's/+/ /g;s/%\(..\)/\\x\1/g;' \
               | xargs -0 echo -e \
               | tee /tmp/tee.log \
               | ${pkgs.urix}/bin/urix \
               | head -1 \
-              > "$uri"
-            sha256=$(sha256sum -b "$uri" | cut -d\  -f1)
+            )
+
+            sha256=$(echo "$uri" | sha256sum -b | cut -d\  -f1)
             base32=$(${pkgs.nixStable}/bin/nix-hash --to-base32 --type sha256 "$sha256")
-            item="$STATEDIR/items/$base32"
-            ref="http://$req_host/$base32"
+            base32short=$(echo "$base32" | cut -b-5)
+            ${pkgs.redis}/bin/redis-cli set "$base32short" "$uri" >/dev/null
 
-            if ! test -e "$item"; then
-              mkdir -v -p "$STATEDIR/items" >&2
-              cp -v "$uri" "$item" >&2
-            fi
-
-            base32short=$(echo "$base32" | cut -b-7)
-            if item=$(find_item "$base32short"); then
-              ref="http://$req_host/$base32short"
-            fi
+            ref="http://$req_host/$base32short"
 
             printf 'HTTP/1.1 200 OK\r\n'
             printf 'Content-Type: text/plain; charset=UTF-8\r\n'