[Bug]: `OTEL_RESOURCE_ATTRIBUTES` doesn't support some characters in the accepted range

[wperron]

What happened?

Some characters in the W3C Baggage octet-range, namely the equal sign (=) breaks Resource initialization from env.

API Version

0.24

SDK Version

0.24

What Exporter(s) are you seeing the problem on?

N/A

Relevant log output

No response

[cijothomas]

Can you elaborate? Resources are expected to support OTel Attributes. What part is it missing, so we can fix it

[wperron]

Sure! If I pass something like a base64-encoded value (anything that ends with an equal sign really) with OTEL_RESOURCE_ATTRIBUTES, it simply doesn't get picked up by the Resource constructor. For example OTEL_RESOURCE_ATTRIBUTES='key=value='.