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authortv <tv@krebsco.de>2020-05-05 16:38:59 +0200
committertv <tv@krebsco.de>2020-05-05 17:49:28 +0200
commitd437145ae1c3f5b4a4975cc681e6c0eadf05712f (patch)
treeb648fdf910f2b64a0c8bac0c64542eadf01591a2
parent66a3597034c0f400a948b551e95234f94c227859 (diff)
htgen-imgur: init at 1.0.0
-rw-r--r--krebs/5pkgs/simple/htgen-imgur/default.nix29
-rw-r--r--krebs/5pkgs/simple/htgen-imgur/src/htgen-imgur209
2 files changed, 238 insertions, 0 deletions
diff --git a/krebs/5pkgs/simple/htgen-imgur/default.nix b/krebs/5pkgs/simple/htgen-imgur/default.nix
new file mode 100644
index 000000000..fe0b2ab04
--- /dev/null
+++ b/krebs/5pkgs/simple/htgen-imgur/default.nix
@@ -0,0 +1,29 @@
+with import <stockholm/lib>;
+{ attr, coreutils, exiv2, findutils, gnugrep, jq, nix, utillinux, stdenv }:
+stdenv.mkDerivation rec {
+ pname = "htgen-imgur";
+ version = "1.0.0";
+
+ src = ./src;
+
+ buildPhase = ''
+ (
+ exec > htgen-imgur
+ echo PATH=${makeBinPath [
+ attr
+ coreutils
+ exiv2
+ findutils
+ gnugrep
+ jq
+ nix utillinux
+ ]}
+ echo STATEDIR=${shell.escape "\${STATEDIR-$HOME}"}
+ cat $src/htgen-imgur
+ )
+ '';
+
+ installPhase = ''
+ install -D htgen-imgur $out/bin/htgen-imgur
+ '';
+}
diff --git a/krebs/5pkgs/simple/htgen-imgur/src/htgen-imgur b/krebs/5pkgs/simple/htgen-imgur/src/htgen-imgur
new file mode 100644
index 000000000..af092d007
--- /dev/null
+++ b/krebs/5pkgs/simple/htgen-imgur/src/htgen-imgur
@@ -0,0 +1,209 @@
+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
+}
+
+# https://api.imgur.com/models/basic
+basic_response() {(
+ status_code=$1
+ status_reason=$2
+ data=${3-null}
+
+ response_body=$(jq -cn \
+ --argjson data "$data" \
+ --argjson status "$status_code" \
+ '
+ {
+ data: $data,
+ status: $status,
+ success: (200 <= $status and $status <= 299),
+ }
+ ')
+
+ printf "HTTP/1.1 $status_code $status_reason\r\n"
+ printf 'Connection: close\r\n'
+ printf 'Content-Length: %d\r\n' $(expr ${#response_body} + 1)
+ printf 'Content-Type: application/json; charset=UTF-8\r\n'
+ printf 'Server: %s\r\n' "$Server"
+ printf '\r\n'
+ printf '%s\n' "$response_body"
+
+)}
+
+file_response() {
+ jq -n -r \
+ --argjson data "$(attr -q -g data "$1")" \
+ --arg server "$Server" \
+ '
+ [ "HTTP/1.1 200 OK\r"
+ , "Connection: close\r"
+ , "Content-Length: \($data.size)\r"
+ , "Content-Type: \($data.type)\r"
+ , "Server: \($server)\r"
+ , "\r"
+ ][]
+ '
+ cat "$1"
+}
+
+read_uri() {
+ jq -cn --arg uri "$1" '
+ $uri |
+ capture("^((?<scheme>[^:]*):)?(//(?<authority>[^/]*))?(?<path>[^?#]*)([?](?<query>[^#]*))?([#](?<fragment>.*))?$") |
+ . + {
+ query: (.query | if . != null then
+ split("&") |
+ map(split("=") | {key:.[0],value:.[1]}) |
+ from_entries
+ else . end)
+ }
+ '
+}
+
+uri=$(read_uri "$Request_URI")
+path=$(jq -nr --argjson uri "$uri" '$uri.path')
+
+case "$Method $path" in
+ 'POST /image')
+ echo create image >&2
+
+ content=$(mktemp -t htgen.$$.content.XXXXXXXX)
+ trap "rm $content >&2" EXIT
+
+ case ${req_expect-} in 100-continue)
+ printf 'HTTP/1.1 100 Continue\r\n\r\n'
+ esac
+
+ head -c $req_content_length > $content
+
+ sha256=$(sha256sum -b $content | cut -d\ -f1)
+ base32=$(nix-hash --to-base32 --type sha256 $sha256)
+ item=$STATEDIR/items/$base32
+
+ if ! test -e $item; then
+ mkdir -v -p $STATEDIR/items >&2
+ cp -v $content $item >&2
+ fi
+
+ base32short=$(echo $base32 | cut -b-7)
+
+ scheme=${req_x_forwarded_proto-http}
+ link=$scheme://$req_host/image/$base32short
+
+ if item=$(find_item $base32short); then
+
+ deletehash=$(uuidgen)
+
+ info=$(
+ exiv2 print "$item" |
+ jq -csR '
+ split("\n") |
+ map(
+ match("^(.*\\S)\\s*:\\s*(.*)").captures |
+ map(.string) |
+ {key:.[0],value:.[1]}
+ ) |
+ from_entries |
+
+ . + (
+ .["Image size"] |
+ match("^(?<width>[0-9]+)\\s*x\\s*(?<height>[0-9]+)$").captures |
+ map({key:.name,value:(.string|tonumber)}) |
+ from_entries
+ ) |
+ . + (
+ .["File size"] |
+ match("^(?<size>[0-9]+)\\s*Bytes$").captures |
+ map({key:.name,value:(.string|tonumber)}) |
+ from_entries
+ ) |
+ .
+ '
+ )
+
+ data=$(jq -cn \
+ --arg deletehash "$deletehash" \
+ --arg id "$base32" \
+ --arg link "$link" \
+ --argjson info "$info" \
+ --argjson uri "$uri" \
+ '
+ {
+ id: $id,
+ title: $uri.query.title,
+ description: $uri.query.description,
+ datetime: now,
+ type: $info["MIME type"],
+ animated: false,
+ width: $info.width,
+ height: $info.height,
+ size: $info.size,
+ views: 0,
+ bandwidth: 0,
+ vote: null,
+ favorite: false,
+ nsfw: null,
+ section: null,
+ account_url: null,
+ acount_id: 0,
+ is_ad: false,
+ is_most_viral: false,
+ tags: [],
+ ad_type: 0,
+ ad_url: "",
+ in_gallery: false,
+ deletehash: @uri "\($id)?deletehash=\($deletehash)",
+ name: "",
+ link: $link,
+ }
+ ')
+
+ attr -q -s deletehash -V "$deletehash" "$item"
+ attr -q -s data -V "$data" "$item"
+
+ basic_response 200 OK "$data"
+ exit
+ fi
+ ;;
+ 'GET /image/'*)
+ basename=$(basename "$path")
+ if printf %s "$basename" | grep -q '^[0-9a-z]\+$'; then
+ if item=$(find_item "$basename"); then
+ echo get image >&2
+ file_response "$item"
+ exit
+ fi
+ fi
+ ;;
+ 'DELETE /image/delete/'*)
+ basename=$(basename "$path")
+ if printf %s "$basename" | grep -q '^[0-9a-z]\+$'; then
+ if item=$(find_item "$basename"); then
+
+ deletehash=$(jq -nr --argjson uri "$uri" '$uri.query.deletehash')
+
+ stored_deletehash=$(attr -q -g deletehash "$item")
+
+ if test "$deletehash" = "$stored_deletehash"; then
+ echo "delete image" >&2
+
+ rm -v "$item" >&2
+
+ basic_response 200 OK
+ exit
+ else
+ echo "delete image error: bad deletehash provided: $deletehash" >&2
+ basic_response 401 'Unauthorized'
+ exit
+ fi
+ fi
+ fi
+ ;;
+esac