Allow to set a custom User Agent

[mhugo]

Allow the plugin to use a custom User Agent when making HTTP requests.

Things that need to be set:

• when using gdal.OpenEx('/vsicurl...'), setting GDAL_HTTP_USER_AGENT https://trac.osgeo.org/gdal/wiki/ConfigOptions#GDAL_HTTP_USERAGENT
• with urllib2, use addheaders https://stackoverflow.com/questions/802134/changing-user-agent-on-urllib2-urlopen
• for owslib: not designed for, no simple solution

[mhugo]

User-Agent set for gdal and qgis / urllib

[sgrellet]

Great. Which tag/string did you use ? (to anticipate our resolver configuration)

[mhugo]

It's configurable in the settings

[sgrellet]

Nice

[sgrellet]

using v1.2.0-rc7 Version de Python : 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)] Version de QGIS : 3.0.1-Girona Girona, a86bec25eb

Opening plugin settings, not touching anything an pressing 'OK'.

NameError: name 'httpUserAgentEdit' is not defined Traceback (most recent call last): File "C:/Users/grellets/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\gml_application_schema_toolbox\gui\settings_dialog.py", line 103, in accept self.save_settings() File "C:/Users/grellets/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\gml_application_schema_toolbox\gui\settings_dialog.py", line 44, in save_settings settings.setValue('http_user_agent', self.http_user_agent()) File "C:/Users/grellets/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\gml_application_schema_toolbox\gui\settings_dialog.py", line 59, in http_user_agent return httpUserAgentEdit.text() NameError: name 'httpUserAgentEdit' is not defined

[sgrellet]

note : the User-Agent value is passed properly as it is logged by our resolver

[mhugo]

Fixed

[sgrellet]

ok under GMLAS toolbox plugin : v1.2.0 Version de Python : 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)] Version de QGIS : 3.0.1-Girona Girona, a86bec25eb