SpringCloud/spring-cloud-sleuth
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin/3.0.x' into main

Browse Source
This commit is contained in:
Marcin Grzejszczak
2021-08-09 13:58:11 +02:00
parent 8e925786a0 0cdf31de7b
commit 51dca96d73
3 changed files with 64 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
docs/src/main/asciidoc/howto.adoc
View File

@@ -368,30 +368,46 @@ class MyService {
[[how-to-add-headers-to-the-http-server-response]]
== How to Add Headers to the HTTP Server Response?
Register a bean of `HttpResponseParser` type whose name is `HttpServerResponseParser.NAME`.
Register an HTTP Filter that
====
[source,java,indent=0]
----
import org.springframework.cloud.sleuth.http.HttpResponseParser;
import org.springframework.cloud.sleuth.instrument.web.HttpServerResponseParser;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.cloud.sleuth.Span;
import org.springframework.cloud.sleuth.Tracer;
import javax.servlet.Filter;
import org.springframework.web.server.WebFilter;
@Configuration(proxyBeanMethods = false)
class MyConfig {
@Bean(name = HttpServerResponseParser.NAME)
HttpResponseParser myHttpResponseParser() {
return (response, context, span) -> {
Object unwrap = response.unwrap();
if (unwrap instanceof HttpServletResponse) {
HttpServletResponse resp = (HttpServletResponse) unwrap;
resp.addHeader("MyCustom", "Header");
}
};
}
// Example of a servlet Filter for non-reactive applications
@Bean
Filter traceIdInResponseFilter(Tracer tracer) {
return (request, response, chain) -> {
Span currentSpan = tracer.currentSpan();
if (currentSpan != null) {
HttpServletResponse resp = (HttpServletResponse) response;
// putting trace id value in [mytraceid] response header
resp.addHeader("mytraceid", currentSpan.context().traceId());
}
chain.doFilter(request, response);
};
}
// Example of a reactive WebFilter for reactive applications
@Bean
WebFilter traceIdInResponseFilter(Tracer tracer) {
return (exchange, chain) -> {
Span currentSpan = tracer.currentSpan();
if (currentSpan != null) {
// putting trace id value in [mytraceid] response header
exchange.getResponse().getHeaders().add("mytraceid", currentSpan.context().traceId());
}
return chain.filter(exchange);
};
}
}
----