add seedingAlliance Adapter

[SeedingAllianceTech]

Type of change

• New bidder adapter

Description of change

• test parameters for validating bids

{
	bidder: 'seedingAlliance',
	params: {
		url  : "https://mockup.seeding-alliance.de/ssp-testing/native.html",
		adUnitId: "2sq2o"
	}
}

• contact email of the adapter’s maintainer
  tech@seeding-alliance.de
• official adapter submission

For any changes that affect user-facing APIs or example code documented on http://prebid.org, please provide:

• A link to a PR on the docs repo at https://github.com/prebid/prebid.github.io/
  New seedingAlliance Adapter prebid.github.io#1701

[jsnellbaker]

Hi @SeedingAllianceTech

Thanks for submitting this adapter.

When I tried to test the adapter with the provided test params, I was getting a CORS error against the endpoint. I have copied it below for reference:
Access to XMLHttpRequest at 'https://b.nativendo.de/cds/rtb/bid?format=openrtb2.5&ssp=nativendo' from origin 'http://test.localhost:9999' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header has a value 'http://test.localhost' that is not equal to the supplied origin.

Can you please take a look into this error?

Thanks.

[SeedingAllianceTech]

Hi @jsnellbaker

i have solved the problem on the server side, can you check again please?

[jsnellbaker]

Hi @SeedingAllianceTech

I just checked again. While I'm not getting the CORS error anymore, I don't seem to be getting an actual response. The request to the endpoint is completing as a 204 response. Is that expected?

Below is a copy of the request payload for reference:

{"id":"c0cda811-e41f-487b-a76a-11387a5cdeb4","site":{"page":"https://mockup.seeding-alliance.de/ssp-testing/native.html"},"device":{"ua":"Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1"},"cur":["EUR"],"imp":[{"id":"1","tagid":"2sq2o","tid":"5e206b51-d637-438b-aa4f-5d7651047257","pt":"net","native":{"request":{"assets":[{"required":1,"id":0,"title":{"len":50}},{"required":1,"id":1,"data":{"len":350,"type":2}},{"required":1,"id":3,"img":{"type":3,"w":300,"h":175}},{"required":1,"id":2,"data":{"type":1}}]}}}],"user":{"buyeruid":"5dff3779-43ee-45b0-b242-8264bda55fc3"}}

[SeedingAllianceTech]

Hi @jsnellbaker

not really, there was no line items for your country, i have add some.

now you should see correct bids.

[jsnellbaker]

Hi @SeedingAllianceTech

Thanks for making the update for the test bid. I checked again and saw a bid was returning.

LGTM