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Allow isSecure property of LoadBalancer ServiceInstance to determine the scheme of the URL. Fixes #641

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Ryan Baxter
2018-12-18 15:51:19 -05:00
parent f06edbaf19
commit 077b647ec4
5 changed files with 70 additions and 7 deletions
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docs/src/main/asciidoc/spring-cloud-gateway.adoc
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@@ -876,6 +876,13 @@ spring:
- Path=/service/**
----
NOTE: The `isSecure` value of the `ServiceInstance` returned from the `LoadBalancer` will override
the scheme specified in the request made to the Gateway. For example, if the request comes into the Gateway over `HTTPS`
but the `ServiceInstance` indicates it is not secure, then the downstream request will be made over
`HTTP`. The opposite situation can also apply. However if `GATEWAY_SCHEME_PREFIX_ATTR` is specified for the
route in the Gateway configuration, the prefix will be stripped and the resulting scheme from the
route URL will override the `ServiceInstance` configuration.
=== Netty Routing Filter
The Netty Routing Filter runs if the url located in the `ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR` exchange attribute has a `http` or `https` scheme. It uses the Netty `HttpClient` to make the downstream proxy request. The response is put in the `ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR` exchange attribute for use in a later filter. (There is an experimental `WebClientHttpRoutingFilter` that performs the same function, but does not require netty)