https://bugs.exim.org/show_bug.cgi?id=2917
Bug ID: 2917
Summary: Return list of headers from perl in transport
Product: Exim
Version: 4.95
Hardware: x86-64
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Transports
Assignee: unallocated@???
Reporter: d.dimix.d@???
CC: exim-dev@???
I came into a situation that possibly is buggy behavior.
There is transport that removes and adds headers generatPerly the perl script:
```
some_transport:
driver = smtp
...
headers_add = ${perl{get_headers_to_add}}
headers_remove = ${perl{get_headers_to_remove}}
```
- get_headers_to_add returns 'headerX: data\nheaderX2: data'
- get_headers_to_remove return a string like 'header1:header2:header3'
Data returned to headers_add acts normally and appends as many headers as
returned. 'headers_remove' instead works if only one header is returned, though
the returned string is a valid colon-separated list.
Consider the following:
14:20:47 1900121 âconsidering: ${perl{get_headers_to_remove}}
14:20:47 1900121 âconsidering: get_headers_to_remove}}
14:20:47 1900121 âââexpanding: get_headers_to_remove
14:20:47 1900121 â°âââââresult: get_headers_to_remove
14:20:47 1900121 âââexpanding: ${perl{get_headers_to_remove}}
14:20:47 1900121 â°âââââresult: header1:header2
'header1' and 'header2' must be removed, but actually, they are not. I tried
using ${map{${perl{func}}}{$item}} and ${filter{${perl{func}}}{$item}} as a
workaround, but no luck. However, when there is only one header removed from
the perl function, the returned header is removed as it should be.
I have hardcoded the required headers to be removed in the exim config, but
want to know if this is an expected behaviour of expansion.
P.S. Tested the returned string with "exim -be
'${listextract{1}{${perl{func}}}}'" - the returned string is interpreted as a
list and the valid index is returned.
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