358.8. HTTP/2 示例
在这个示例中，我们将 camel-undertow 组件配置为支持 HTTP/2 协议，并在 http://localhost:7766/foo/bar 公开 HTTP 服务。
这个示例的目录结构如下：
├── pom.xml 1 ├── README.md └── src └── main └── resources └── META-INF └── spring └── camel-context.xml 2
以下文件对于将 camel-undertow 组件配置为支持 HTTP/2 协议非常重要：
- 1
- pom.xml ：包含以下属性和依赖项：
<properties> <camel.version>2.23.1</camel.version> </properties> <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-core</artifactId> <version>${camel.version}</version> </dependency> <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-spring</artifactId> <version>${camel.version}</version> </dependency> <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-undertow</artifactId> <version>${camel.version}</version> </dependency> <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-http-common</artifactId> <version>${camel.version}</version> </dependency> <plugin> <groupId>org.apache.camel</groupId> <artifactId>camel-maven-plugin</artifactId> <version>${camel.version}</version> <configuration> <fileApplicationContextUri>src/main/resources/META-INF/spring/camel-context.xml</fileApplicationContextUri> </configuration> </plugin> - 2
- camel-context.xml ：配置 camel-undertow 组件，如下所示：
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd"> <camelContext id="cbr-example-context" xmlns="http://camel.apache.org/schema/spring"> <route id="cbr-route" trace="true"> <from id="_from1" uri="undertow:http://localhost:7766/foo/bar"/> <setBody id="_setBody1"> <constant>Sending Response</constant> </setBody> <log id="_log5" message="Headers ${in.headers}"/> <log id="_log5" message="Done processing ${body}"/> </route> </camelContext> <bean class="org.apache.camel.component.undertow.UndertowComponent" id="undertow"> <property name="hostOptions" ref="undertowHostOptions"/> </bean> <bean class="org.apache.camel.component.undertow.UndertowHostOptions" id="undertowHostOptions"> <property name="http2Enabled" value="true"/> </bean> </beans>
注意
默认情况下，对于 UndertowHostOptions 类，http2Enabled 属性设置为 false。然后，此类被称为 UndertowComponent，在 camel 路由中使用。
在本例中，通过在 pom.xml 文件中使用 camel-maven-plugin，我们在执行 Maven 命令 mvn camel:run 时，可以在 http://localhost:7766/foo/bar 中公开 HTTP 服务。
我们可以使用 curl 命令测试这个示例，如下所示：
$ curl -v --http2 http://localhost:7766/foo/bar * Trying ::1... * TCP_NODELAY set * connect to ::1 port 7766 failed: Connection refused * Trying 127.0.0.1... * TCP_NODELAY set * Connected to localhost (127.0.0.1) port 7766 (#0) > GET /foo/bar HTTP/1.1 > Host: localhost:7766 > User-Agent: curl/7.53.1 > Accept: */* > Connection: Upgrade, HTTP2-Settings > Upgrade: h2c > HTTP2-Settings: AAMAAABkAARAAAAAAAIAAAAA > < HTTP/1.1 101 Switching Protocols < Connection: Upgrade < Upgrade: h2c < Date: Sun, 10 Dec 2017 08:43:58 GMT * Received 101 * Using HTTP2, server supports multi-use * Connection state changed (HTTP/2 confirmed) * Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0 * Connection state changed (MAX_CONCURRENT_STREAMS updated)! < HTTP/2 200 < accept: */* < http2-settings: AAMAAABkAARAAAAAAAIAAAAA < breadcrumbid: ID-dhcppc1-1512886066149-0-25 < content-length: 16 < user-agent: curl/7.53.1 < date: Sun, 10 Dec 2017 08:43:58 GMT < * Connection #0 to host localhost left intact Sending Response
