Cherry-pick #20232 to 7.9: [Filebeat Input][HTTP_endpoint] Add possibility to override content-type header#20237

Merged

marc-gr merged 1 commit intoelastic:7.9from marc-gr:backport_20232_7.9

Jul 27, 2020

+20-1

Commits on Jul 27, 2020

adding possibility to override content-type checks, it was breaking certain webhooks that is not able to set content-headers at all. Still defaults to application/json (elastic#20232 )

P1llus
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marc-gr
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