對所有傳入郵件執行bash命令（Postfix）

Question

我想對每個傳入郵件的正文執行命令。

sed ':a;N;$!ba;s/=\n//g' /path-to/message-file | sed 's/</\n\</g' | sed -r '/'"$(sed -r 's/\\/\\\\/g;s/\//\\\//g;s/\^/\\^/g;s/\[/\\[/g;s/'\''/'\'"\\\\"\'\''/g;s/\]/\\]/g;s/\*/\\*/g;s/\$/\\$/g;s/\./\\./g' whitelist | paste -s -d '|')"'/! s/http/httx/g' 

我認爲這可能是可能的Postfix After-Queue Content Filter，但我不知道該怎麼辦呢？

編輯：

afterqueue.sh

#!/bin/sh 
# Simple shell-based filter. It is meant to be invoked as follows: 
#  /path/to/script -f sender recipients... 

# Localize these. The -G option does nothing before Postfix 2.3. 
INSPECT_DIR=/var/spool/filter 
SENDMAIL="/usr/sbin/sendmail -G -i" # NEVER NEVER NEVER use "-t" here. 

# Exit codes from <sysexits.h> 
EX_TEMPFAIL=75 
EX_UNAVAILABLE=69 

# Clean up when done or when aborting. 
trap "rm -f in.$$" 0 1 2 3 15 

# Start processing. 
cd $INSPECT_DIR || { 
    echo $INSPECT_DIR does not exist; exit $EX_TEMPFAIL; } 

cat >in.$$ || { 
    echo Cannot save mail to file; exit $EX_TEMPFAIL; } 

# Specify your content filter here. 
sh /path/to/remove_links.sh <in.$$ 

$SENDMAIL "$@" <in.$$ 

exit $? 

remove_links .sh

#!/bin/bash 

sed ':a;N;$!ba;s/=\n//g' $1 | sed 's/</\n\</g' | sed -r '/'"$(sed -r 's/\\/\\\\/g;s/\//\\\//g;s/\^/\\^/g;s/\[/\\[/g;s/'\''/'\'"\\\\"\'\''/g;s/\]/\\]/g;s/\*/\\*/g;s/\$/\\$/g;s/\./\\./g' /path/to/whitelist | paste -s -d '|')"'/! s/http/httx/g' 

它是工作，如果我用手工調用它，但如果我把它添加到/etc/postfix/master.cf這樣的：

# ============================================================= 
    # service type private unpriv chroot wakeup maxproc command 
    #    (yes) (yes) (yes) (never) (100) 
    # ============================================================= 
    filter unix -  n  n  -  10  pipe 
    flags=Rq user=filter null_sender= 
    argv=/path/to/afterqueue.sh -f ${sender} -- ${recipient} 

有在郵件中沒有變化。 我得到以下系統日誌：

Apr 13 15:14:08 rs211184 postfix/qmgr[7492]: 3FFDF23CB5F: from=<test@gmail.com>, size=4358, nrcpt=1 (queue active) 
Apr 13 15:14:08 rs211184 postfix/pipe[7504]: 116E523CA8C: to=<example@example.de>, relay=filter, delay=0.2, delays=0.16/0/0/0.04, dsn=2.0.0, status=sent (delivered via filter service) 
Apr 13 15:14:08 rs211184 postfix/qmgr[7492]: 116E523CA8C: removed 
Apr 13 15:14:08 rs211184 postfix-local[7522]: postfix-local: from=test@gmail.com, to=example@example.de, dirname=/var/qmail/mailnames 
Apr 13 15:14:08 rs211184 postfix/pipe[7521]: 3FFDF23CB5F: to=<dsehlhoff@lcdev1.de>, relay=plesk_virtual, delay=0.02, delays=0.01/0/0/0.01, dsn=2.0.0, status=sent (delivered via plesk_virtual service) 
Apr 13 15:14:08 rs211184 postfix/qmgr[7492]: 3FFDF23CB5F: removed 

Answer 1

你似乎期望在文件的消息，奇怪的是一個靜態的文件名，但是這不是它的工作原理。該消息到達標準輸入。最起碼，只要刪除/path/to/message-file - 但真的，管道sed到sed往往是一個錯誤;你應該將它重構爲一個sed腳本（或Awk，或者Python，或者你有什麼）。

sed -e ':a;N;$!ba;s/=\n//g' -e 's/</\n\</g' | 
# This is too convoluted, really! 
sed -r '/'"$(sed -r 's/\\/\\\\/g;s/\//\\\//g;s/\^/\\^/g;s/\[/\\[/g;s/'\''/'\'"\\\\"\'\''/g;s/\]/\\]/g;s/\*/\\*/g;s/\$/\\$/g;s/\./\\./g' whitelist | 
paste -s -d '|')"'/! s/http/httx/g'