[sane-devel] [New backend] Web Services for Devices - wsd-scan
pzz at apevzner.com
Mon Jan 6 13:55:09 GMT 2020
On 1/6/20 10:06 AM, Klaus Kämpf wrote:
> based on previous discussions and out of personal need, I
> started to develop a new backend, implementing the Web Services for
> Devices standard.
Thank you very much!
I want to say one thing. Using libcurl in a project like this is very
dangerous. libcurl in general is thrad-safe, but its global
initialization is not.
This is not a problem, when libcurl is used from a main program, but it
becomes a problem when libcurl is used from a loadable plugin. If there
is 2 or more such a plugins on a program, sooner or later they will
crash a process.
OpenSSL has a similar problem. GnuTLS doesn't.
libsoup is safe. libsoup is not very pleasant to deal with, and it
brings a dependency on glib, but at least it is safe.
lubcups also looks as a considerable alternative, and it contains a
generic HTTP client. Though it will look a bit strange if scanner plugin
will depend on a CUPS API library :-)
Wishes, Alexander Pevzner (pzz at apevzner.com)
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