Pandoc: User Agent argument switch if downloading content/images

[mehmetaergun]

Is it possible to allow the user to select/input a specific user agent for when pandoc retrieves files or data from a server?

For instance, I am unable to retrieve images from Facebook, which instead complains that the browser I am using is not supported. Unfortunately, I could not find a way to change the user agent myself.

Many thanks in advance :)

[mb21]

pandoc does not support this out of the box. however, you can either:

• write a script (or pandoc filter) to download the files with curl or wget to the file system, or
• use a proxy server transparently, pandoc respects the environment variable, e.g.: export http_proxy=http://127.0.0.1:3142/

[jgm]

Maybe we shouldn't close this. After all, it would be
possible to have pandoc do something like

setDefaultHeader "User-Agent" $ Just "A very popular browser"

when fetching if a PANDOC_USER_AGENT environment variable is
set, or if a command-line option is used...

So I think it's worth keeping this open as a feature
request.

[mb21]

Okay, sure.. if this feature request is common enough and easy enough to implement...

btw, this would probably go into the openURL function

[mehmetaergun]

Thank you so very much for both the guidance and reconsidering the ticket :)

[jgm]

Note: I've removed this behavior, since we now have a --request-header option and you can do --request-header User-Agent:foo