[BUG] configparser screws up case sensitivity

[MikeSchiessl]

Describe the bug
When running ULS with the section specified in UPPERCASE e.g. ULS_SECTION=DEFAULT but specified the section name within the .edgerc lowercase [default], config parser seems to be able to find the section but the config value (e.g. 'host') cannot be found.

ULS will return something weird like this:

ULS D Section 'DEFAULT' found.
ULS C Required configuration value 'host' not found in section / file. Please see: https://github.com/akamai/uls/blob/main/docs/AKAMAI_API_CREDENTIALS.md - Exiting

To Reproduce

bin/uls.py -i etp -f threat -o raw --loglevel debug --edgerc /opt/akamai-uls/my-edge --section DEFAULT
...
ULS D Section 'DEFAULT' found.
ULS C Required configuration value 'host' not found in section / file. Please see: ..... 

bin/uls.py -i etp -f threat -o raw --loglevel debug --edgerc /opt/akamai-uls/my-edge --section default
...
ULS starts running as expected 

bin/uls.py -i etp -f threat -o raw --loglevel debug --edgerc /opt/akamai-uls/my-edge --section DeFauLt
...
ULS C Section 'DeFauLt' not found. Available sections: '['default']'. - Exiting

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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ULS Version output
please run the following and attach the output here.

Akamai Unified Log Streamer Version information
ULS Version             1.3.0

EAA Version             0.4.5
ETP Version             0.3.6
MFA Version             0.0.6

OS Plattform            Linux-5.4.172-90.336.amzn2.x86_64-x86_64-with-glibc2.31
OS Version              5.4.172-90.336.amzn2.x86_64
Python Version          3.10.1
Docker Status           True
RootPath                /opt/akamai-uls/uls

Additional context
Seems to be a bug inside the configparser module - we will need to dig into this little deeper.
As "QuickFix" and for reference, I'll create a FAQ entry and leave this issue as reference.

[MikeSchiessl]

QuickFix:

Please watch out to specify the section exactly the same way (case sensitivity) as you have specified it in your .edgerc file.

[bitonio]

That seems to follow the original specs:
https://docs.python.org/3.10/library/configparser.html#supported-ini-file-structure

By default, section names are case sensitive but keys are not.

[mschiessl]

@bitonio - agreed and actually being case sensitive would be awesome, but then this could not happen at all:

.edgerc

[default]
host=aka-....
...

command

bin/uls.py -i etp -f threat -o raw --loglevel debug --edgerc /opt/akamai-uls/my-edge --section DEFAULT
...
ULS D Section 'DEFAULT' found.
ULS C Required configuration value 'host' not found in section / file. Please see: ..... 

So this is the mismatch that broke my nose today ;)

[MikeSchiessl]

added to FAQ in v. 1.3.2 / 1.3.3