We got this email After September 30, HTTP(S) Load Balancers will convert HTTP/1.1 header names to lowercase in the request and response directions; header values will not be affected.
As header names are case-insensitive, this change will not affect clients and servers that follow the HTTP/1.1 specification (including all popular web browsers and open source servers). Similarly, as HTTP/2 and QUIC protocols already require lowercase header names, traffic arriving at load balancers over these protocols will not be affected. However, we recommend testing projects that use custom clients or servers prior to the rollout to ensure minimal impact. However I do not understand if this will affect headers injected by google, like "HTTP_X_APPENGINE_COUNTRY" which we use on our project, is this going to change or will it remain unaffected? -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/13ecb398-15ea-47cc-841c-57cbd0398df7%40googlegroups.com.
