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|
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
|
