109 lines
4.0 KiB
Bash
Executable File
109 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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#A script that interacts with 4chans API to checks for media to download out of threads.
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#It uses the file name used by the uploader.
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#consider using it in a cronjob intermittently with something like
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#*/10 * * * * /home/<yourname>/.local/bin/threadwatcher scan
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THREADWATCHER_DIR=${XDG_DATA_HOME:-$HOME/.local/share}/4chan_watcher
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URLFILE="$THREADWATCHER_DIR/threads"
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TMP_URLFILE=/tmp/4chan_thread_watcher_tmp$$
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[ -d "$THREADWATCHER_DIR" ] || mkdir -p "$THREADWATCHER_DIR"
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[ -f "$URLFILE" ] || touch "$URLFILE"
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scan(){
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if [ $(wc -l "$URLFILE"| cut -d ' ' -f1) -gt 0 ]; then
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echo "scanning threads..."
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else
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echo "no threads to watch over currently"
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exit
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fi
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while read -r line; do
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running_dls=0
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url="$(echo "$line" | cut -f1)"
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echo "scanning $url"
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dl_location="$(echo "$line" | cut -f2)"
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mkdir -p "$dl_location"
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echo "downloading to $dl_location"
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mkdir -p "$dl_location"
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json_url="$(echo "$url" | sed -E 's/boards\.(4chan|4channel)/a.4cdn/; s/$/.json/')"
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curl -s -L "$json_url" | jq . > /tmp/content$$
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#delete archived threads from watchlist
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if [ -z "$(</tmp/content$$)" ]; then
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echo "Thread $url not found ($dl_location) deleting from cached list of threads to watch"
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continue
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else
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echo "$line" >> "$TMP_URLFILE"
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fi
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files_json="$(jq '.posts[] | if has("filename") then {filename: "\(.no)_\(.filename)\(.ext)", location: "\(.tim)\(.ext)", md5: .md5} else null end ' < /tmp/content$$ | grep -vE '^null$')"
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echo "$files_json" | jq '.filename' | tr -d '"' >> /tmp/filename$$
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echo "$files_json" | jq '.location' | tr -d '"' >> /tmp/location$$
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echo "$files_json" | jq '.md5' | tr -d '"' >> /tmp/md5$$
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paste /tmp/filename$$ /tmp/location$$ >> /tmp/tmp$$
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files="$(paste /tmp/tmp$$ /tmp/md5$$)"
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rm /tmp/tmp$$ /tmp/md5$$ /tmp/location$$ /tmp/filename$$ /tmp/content$$
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echo "$files" | while read -r file_line; do
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filename="$(echo "$file_line" | cut -f1)"
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master_location="$(echo "$file_line" | cut -f2 | tr -d '"')"
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filelocation="$dl_location/$filename"
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correct_md5="$(echo "$file_line" | cut -f3)"
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[ -f "$filelocation" ] && slave_md5="$(openssl dgst -md5 -binary "$filelocation" | openssl enc -base64)"
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board="$(echo "$url" | cut -d '/' -f4)"
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file_url="https://i.4cdn.org/$board/$master_location"
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if [ -f "$filelocation" ] && [ "$correct_md5" = "$slave_md5" ]; then
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true
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else
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if [ "$correct_md5" != "$slave_md5" ] && [ -f "$filelocation" ]; then
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rm "$filelocation"
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echo "removed $filename because of incorrect checksum, redownloading."
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fi
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[ -f "$filelocation" ] ||
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touch "$filelocation" #to keep atime order correct?
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#limit concurrent dls
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if [ $running_dls -gt 25 ]; then
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wait
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running_dls=0
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fi
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wget -q -O "$filelocation" "$file_url" &
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echo downloading "$filelocation"
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((running_dls=running_dls+1))
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fi
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done
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wait
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done<"$URLFILE"
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mv "$TMP_URLFILE" "$URLFILE"
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}
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case "$1" in
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"add") if echo "$3" | grep -qE '^/'; then
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dl_location="$3"
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else
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dl_location="$HOME/$3"
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fi
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if grep -qP "^$2\t" "$URLFILE"; then
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dl_location_already="$(grep -P "^$2\t" "$URLFILE" | cut -f2)"
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notify-send "threadwatcher" "Thread already being watched. currently downloads to $dl_location_already"
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choice="$(dmenuinput "If you want to change location of thread to download, please insert new directory now:")"
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if echo "$choice" | grep -qE '^/'; then
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new_location="$3"
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else
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new_location="$HOME/$3"
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fi
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[ -z "$new_location" ] && exit
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sed -i "s|$dl_location_already|$new_location|" "$URLFILE"
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mv $dl_location_already/* "$new_location"
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notify-send "threadwatcher" "already downloaded files moved to $new_location. New files will also be downloaded there"
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else
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printf "%s\t%s\n" "$2" "$dl_location" | tee -ai "$URLFILE"
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echo "added $2 to threadwatcher list. Downloading to $dl_location"
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fi
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scan;;
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"scan") scan;;
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"list") printf "Thread:\t\t\t\t\t\tDownload location:\n"
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sed "s|$HOME|~|" "$URLFILE";;
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"clean")
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echo "Watchlist used up to now:"
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cat "$URLFILE"
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echo "Deleting..."
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rm "$URLFILE"
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touch "$URLFILE";;
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esac
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