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73 lines
2.5 KiB
Bash
73 lines
2.5 KiB
Bash
#!/bin/bash
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# function used by fetch-all* to download server descriptors and
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# extra info documents
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# Copyright (c) 2005, 2006, 2007, 2008 Peter Palfrader
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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fetch_digest() {
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local digest
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local objecttype
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local urlpart
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local pathpart
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local target
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local targetdir
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local dirserver
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local ei
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digest="$1"
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objecttype="$2"
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if [ "$objecttype" = "server-descriptor" ] ; then
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urlpart="server"
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pathpart="server-descriptor"
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elif [ "$objecttype" = "extra-info" ] ; then
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urlpart="extra"
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pathpart="extra-info"
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else
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echo "Called fetch_digest with illegal objecttype '$objecttype'" >&2
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exit 1
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fi
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target=$( echo $digest | sed -e 's#^\(.\)\(.\)#'"$pathpart"'/\1/\2/\1\2#' )
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targetdir=$( dirname $target )
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[ -d "$targetdir" ] || mkdir -p "$targetdir"
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if ! [ -e "$target" ]; then
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for dirserver in $DIRSERVERS; do
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wget -q -O "$target" http://$dirserver/tor/$urlpart/d/"$digest" || rm -f "$target"
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if [ -s "$target" ]; then
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if egrep '^opt extra-info-digest ' "$target" > /dev/null; then
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ei=$( egrep '^opt extra-info-digest ' "$target" | awk '{print $3}' | tr 'A-F' 'a-f' )
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fetch_digest "$ei" "extra-info"
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elif egrep '^extra-info-digest ' "$target" > /dev/null; then
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ei=$( egrep '^extra-info-digest ' "$target" | awk '{print $2}' | tr 'A-F' 'a-f' )
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fetch_digest "$ei" "extra-info"
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fi
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break
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else
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rm -f "$target"
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fi
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done
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fi
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#if ! [ -e "$target" ]; then
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# echo "$objecttype $digest" >> failed
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#fi
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}
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