git.plutz.net Git - shellwiki/blob - attachment.sh

   1 #!/bin/sh
   2
   3 attachment_convert(){
   4   local attpath="$1"
   5   local cachepath="${attpath%/#attachments/*}/#cache/${attpath#*/#attachments/}"
   6   local res junk
   7
   8   case $attpath in
   9     *.webm|*.mp4|*.mkv|*.avi)
  10       cachepath="${cachepath}.webm"
  11       ;;
  12   esac
  13
  14   if [ -s "$cachepath" ]; then
  15     printf %s "$cachepath"
  16     return 0
  17   elif [ -f "$cachepath" ]; then
  18     printf %s "$attpath"
  19     return 0
  20   elif ! mkdir -p -- "${cachepath%/*}" && touch "$cachepath"; then
  21     printf %s "$attpath"
  22     return 0
  23   fi
  24
  25   case $attpath in
  26     *.jpg|*.jpeg|*.png)
  27       read junk junk res junk <<-EOF
  28         $(identify "$attpath")
  29         EOF
  30       if [ "${res%x*}" -gt 2048 ]; then
  31         convert "$attpath" -resize 1920x-2 -quality 85 "$cachepath"
  32       else
  33         convert "$attpath" -quality 85 "$cachepath"
  34       fi
  35       printf %s "$cachepath"
  36       return 0
  37     ;;
  38     *.webm|*.mp4|*.mkv|*.avi)
  39       res=$(ffprobe -show_entries stream=width "$attpath" 2>&-)
  40       res="${res#*width=}" res="${res%%${BR}*}"
  41       if [ "$res" -gt 1280 ]; then
  42         ( exec >&- 2>&1;
  43           ffmpeg -y -nostdin -i "$attpath" \
  44           -c:v libvpx -vf scale=1280:-2 -crf 28 -b:v 0 \
  45           -c:a libvorbis -q:a 6 \
  46           "${cachepath%.*}.tmp.webm" \
  47           && mv -- "${cachepatch%.*}.tmp.webm" "${cachepath}" \
  48         & ) &
  49
  50       else
  51         ( exec >&- 2>&1;
  52           ffmpeg -y -nostdin -i "$attpath" \
  53           -c:v libvpx -crf 28 -b:v 0 \
  54           -c:a libvorbis -q:a 6 \
  55           "${cachepath%.*}.tmp.webm" \
  56           && mv -- "${cachepatch%.*}.tmp.webm" "${cachepath}" \
  57         & ) &
  58       fi
  59       printf %s "$attpath"
  60       return 0
  61     ;;
  62   esac
  63 }
  64
  65 if [ "${PATH_INFO%/\[attachment\]/}"  != "${PATH_INFO}" ]; then
  66   tsid="$(POST session_key)"; tsid="${tsid%% *}"
  67   attachment_delete="$(POST delete)"
  68
  69   if [ "${CONTENT_TYPE%%;*}" = "multipart/form-data" ] && acl_write "${PATH_INFO%\[attachment\]/}"; then
  70     . "$_EXEC/multipart.sh"
  71     multipart_cache
  72
  73     # Validate session id from form to prevent CSRF
  74     # Only validate if username is present, because no username means
  75     # anonymous uploads are allowed via acl and cgilite/session.sh does not
  76     # validate anonymous sessions from a multipart/formdata
  77     if [ "$USER_NAME" -a "$(multipart session_id)" != "$SESSION_ID" ]; then
  78       rm -- "$multipart_cachefile"
  79       printf 'Refresh: %i\r\n' 4
  80       theme_403
  81       exit 0
  82     fi
  83
  84     mkdir -p "$_DATA/pages/${PATH_INFO%/\[attachment\]/}/#attachments/"
  85     n=1; while filename=$(multipart_filename "file" "$n"); do
  86       filename="$(printf %s "$filename" |tr /\\0 __)"
  87       multipart "file" "$n" >"$_DATA/pages/${PATH_INFO%/\[attachment\]/}/#attachments/$filename"
  88       n=$((n + 1))
  89     done
  90     rm -- "$multipart_cachefile"
  91     REDIRECT "${_BASE}${PATH_INFO}"
  92   elif [ "${CONTENT_TYPE%%;*}" = "multipart/form-data" ]; then
  93     printf 'Refresh: %i\r\n' 4
  94     theme_403
  95     head -c $((CONTENT_LENGTH)) >/dev/null
  96   elif [ "$attachment_delete" -a "$SESSION_ID" = "$tsid" ]; then
  97     rm -- "$_DATA/pages/${PATH_INFO%/\[attachment\]/}/#attachments/$attachment_delete"
  98     REDIRECT "${_BASE}${PATH_INFO}"
  99   elif [ "$attachment_delete" ]; then
 100     printf 'Refresh: %i\r\n' 4
 101     theme_403
 102   elif acl_read "${PATH_INFO%\[attachment\]/}"; then
 103     theme_attachments "${PATH_INFO%\[attachment\]/}"
 104   else
 105     theme_404
 106   fi
 107
 108 elif [ "${PATH_INFO%/\[attachment\]/*}" != "${PATH_INFO}" ]; then
 109   attpath="${PATH_INFO%/\[attachment\]/*}/#attachments/${PATH_INFO##*/}"
 110
 111   if ! acl_read "${PATH_INFO%/\[attachment\]/*}"; then
 112     theme_403
 113   elif [ -f "$_DATA/pages/$attpath" ]; then
 114     FILE "$_DATA/pages/$attpath"
 115   elif [ -f "$_EXEC/pages/$attpath" ]; then
 116     FILE "$_EXEC/pages/$attpath"
 117   else
 118     theme_404
 119   fi
 120 #  exit 0;
 121
 122 elif [ "${PATH_INFO%/}" = "${PATH_INFO}" ]; then
 123   attpath="${PATH_INFO%/*}/#attachments/${PATH_INFO##*/}"
 124
 125   if ! acl_read "${PATH_INFO%/*}/"; then
 126     theme_403
 127   elif [ -f "$_DATA/pages/$attpath" ]; then
 128     FILE "$(attachment_convert "$_DATA/pages/$attpath")"
 129   elif [ -f "$_EXEC/pages/$attpath" ]; then
 130     FILE "$(attachment_convert "$_EXEC/pages/$attpath")"
 131   elif [ -d "$_DATA/pages/${PATH_INFO}" -o -d "$_EXEC/pages/${PATH_INFO}" ]; then
 132     REDIRECT "${_BASE}${PATH_INFO}/"
 133   elif [ "${PATH_INFO%\[*\]}" = "${PATH_INFO}" ]; then
 134     theme_404
 135   fi
 136 fi