Dynamically built links for stac-fast-api-pgstac behind proxy are wrong

[brunifrancesco]

Dears,

I got stac-fast-api application deployed behind a Spring cloud application that add an authorization layer on top of it.
Everything works, except for dynamic-build links that look messed up due to (probably) duplicated header values:

{"collections":[],"links":[{"rel":"root","type":"application/json","href":"https,https,https://XXX,XXX,XXX"}}

where XXX is my domain name.
As you see, the href attribute is bad-formatted, causing the any further interaction not working.

In order to fix it, I'm trying to understand how the application builds those urls to inspect the right pieces of data that cause the issue.
Any suggestions?

FB

[vincentsarago]

@brunifrancesco it would help if you shared which backend you're using and also the version of the modules

looking at stac-fastapi only the links are dynamically created in

stac-fastapi/stac_fastapi/types/stac_fastapi/types/links.py

Lines 36 to 38 in 6d65525

	def root(self) -> Dict[str, Any]:
	"""Return the catalog root."""
	return dict(rel=Relations.root, type=MimeTypes.json, href=self.base_url)

and using base_url from

stac-fastapi/stac_fastapi/types/stac_fastapi/types/requests.py

Lines 6 to 12 in 6d65525

	def get_base_url(request: Request) -> str:
	"""Get base URL with respect of APIRouter prefix."""
	app = request.app
	if not app.state.router_prefix:
	return str(request.base_url)
	else:
	return "{}{}/".format(str(request.base_url), app.state.router_prefix.lstrip("/"))

it all comes down to request.base_url defined by starlette.requests.Request https://github.com/encode/starlette/blob/0109dce29b76c64e93c56c01fa5020860f935ed3/starlette/requests.py#L105-L120

messed up due to (probably) duplicated header values

Yeah it seems so

[brunifrancesco]

Thanks Vincent, I'm actually using pgstac as backend.
I'll give a look at starlette, trying to understand which header has been duplicated.
Thanks for the insightful tips,

FB