Procmail 内容作为 POST 变量

Question

Procmail should send my emails with the content to my api. No matter what I try, I get the subject etc., but I can't get to the content. The $CONTENT variable is filled with the subject.

:0
{
 :0 w
  | CONTENT= cat

 :0
 | URL=$(curl -d  "content=$CONTENT" -d "title=Logged Activity" https://myapi.de/fetch.php);

}

Answer 1

You have a repeated syntax error;

:0 w
| CONTENT= cat

means assign an empty string to CONTENT for the duration of the cat command. I guess your intent is to assign the message's contents to the variable. The syntax for that would be

CONTENT=| cat    

(not a recipe, so no :0 w is useful, necessary, or correct here); but if you don't use this variable for anything else, there really is no need to assign it separately.

:0
| URL=$(curl -d  "content=$(cat)" -d "title=Logged Activity" https://myapi.de/fetch.php);

As above, this also probably doesn't do what you actually want. If you expect the variable to be assigned within your .procmailrc , try

URL=|curl -d "content=$(cat)" -d "title=Logged Activity" https://myapi.de/fetch.php;

The trailing semicolon (or some other character from SHELLMETAS ) is required to force Procmail to run the subprocess in a shell (otherwise it would pass through the literal string content=$(cat) as the value of the option -d ).

In some more detail, the recipe

:0
| variable=$(cat)

would run a shell as a subprocess, and assign the message's contents as the value of the shell variable variable , but then immediately exit, which of course loses any effects of variable assignments which happened within that subprocess.