Running in an Azure Function

[Ayiadim]

Hello,

This isn't really an issue with the package itself but more of a question to see if anyone else has had this problem.

I've added this package to a .NET azure function, it works fine locally but as soon as it is deployed to the cloud I get these errors:

Encoding web name: ; code page: ''

Force kill process on cancellation: 'True'

Traceback (most recent call last):

return _run_code(code, main_globals, None,

exec(code, run_globals)

File "scripts\weasyprint.exe\__main__.py", line 4, in <module>

from .css import preprocess_stylesheet # noqa isort:skip

from . import computed_values, media_queries

from .. import text

import cairocffi as cairo

cairo = dlopen(

raise OSError(error_message) # pragma: no cover

OSError: no library called "cairo" was found

cannot load library 'gtk3\libcairo-2.dll': error 0x7f

cannot load library 'libcairo.so': error 0x7e

cannot load library 'libcairo.2.dylib': error 0x7e

cannot load library 'libcairo-2.dll': error 0x7f

Finished process 4688 with exit code 1, and elapsed time 00:00:01.7287848.

It looks like the dependencies are failing, I've added python 3.6.4 x64 and x86 as an extension but it didn't seem to solve the problem.

Any help would be appreciated, thanks.

[berthertogen]

Is your function running in Windows? This package needs to run under windows.

[jektvik]

Have the same problem on my Azure WebApp -> exact same crash response OSError: no library called "cairo" was found. It's a windows based instance indeed.

[berthertogen]

I've created an alternate package https://github.com/berthertogen/weasyprint.wrapped which supports Windows as well as Linux. Haven't tested it in a azure function though. You might give that a try?

[jektvik]

That alternate package also fails with a missing library, this time it's:

cannot load library 'pango-1.0-0'

We're still on a managed web app environment in Azure. It works locally on my machine so I don't know how these environments are different but there must be something different. I'm not a python developer to debug this efficiently enough i.e. mostly would be good to understand why he finds these missing libraries on my local machine but not on azure.

[berthertogen]

Hello @jektvik, I've done some more research on the subject after having an issue submitted on the other repo as well. More info here https://github.com/berthertogen/weasyprint.wrapped/issues/39#issuecomment-1367331090.

TLDR: The Azure App Services/Functions are missing components which aren't in python packages (and thus cannot be packaged). The provided solution provides an asp.net container with the necessary components, Azure App Services/Functions can run this container (or an extension of that container with your sources on it).

I have researched the Azure App Service Container options and got it working, if you like to use it in an Azure App Function as well could you give me a poke in this issue and I'll investigate and provide an example.

[jektvik]

Hi @berthertogen thanks for reverting. Containers are unfortunately a headache for us at this moment as we do not have the facility to build containers yet (not even locally, no comment, but it is what it is).