Jetty HTTP/2客户端接收服务器推送示例 [英] Jetty HTTP/2 client receive server push example
问题描述
Jetty 9.3 RC(链接).但是，我没有找到与此相关的任何文档或示例代码.任何人都可以提供示例代码来例如从该站点接收推送的资源: https://nghttp2.org (公开具有已启用http2服务器推送的服务器)
Jetty's HTTP/2 client with server push support has been implemented in Jetty 9.3 RC (Link). However, I have not found any documentation or example code related to this. Could any one provide an example code for example to receive the pushed resource from this site : https://nghttp2.org (public server which has enabled http2 server push)
---UPDATE 1--- I have tried to test this file as sbordet has said. However, after executing this line
mvn compile exec:java
我遇到了这个错误
[INFO] --- exec-maven-plugin:1.4.0:java (default-cli) @ http2client ---
2015-05-05 01:52:47.808:INFO::com.example.Client.main(): Logging initialized @3096ms
[WARNING]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.TimeoutException
at org.eclipse.jetty.util.FuturePromise.get(FuturePromise.java:130)
at com.example.Client.main(Client.java:55)
... 6 more
这是我的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>http2client</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>http2client</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.eclipse.jetty.http2</groupId>
<artifactId>http2-client</artifactId>
<version>9.3.0.M2</version>
</dependency>
<dependency>
<groupId>org.mortbay.jetty.alpn</groupId>
<artifactId>alpn-boot</artifactId>
<version>8.1.3.v20150130</version>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.4.0</version>
<executions>
<execution>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>com.example.Client</mainClass>
</configuration>
</plugin>
</plugins>
</build>
这是我的项目目录
|-- pom.xml
|-- src
| `-- main
| `-- java
| `-- com
| `-- example
| `-- Client.java
`-- target
|-- classes
| `-- com
| `-- example
| |-- Client$1.class
| `-- Client.class
`-- maven-status
`-- maven-compiler-plugin
`-- compile
`-- default-compile
|-- createdFiles.lst
`-- inputFiles.lst
---更新2 ---
将我的pom.xml <build>标记更改为此:(明确使用JDK 8并添加-Xbootclasspath指向Jetty提供的alpn-boot.jar).我正在使用Java 8 update 31
Changed my pom.xml <build> tag to this: (explicitly use JDK 8 and add -Xbootclasspath to point to the alpn-boot.jar provided by Jetty). I am using Java 8 update 31
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.4.0</version>
<executions>
<execution>
<goals>
<goal>exec</goal>
</goals>
</execution>
</executions>
<configuration>
<executable>java</executable>
<arguments>
<argument>-Xbootclasspath/p:/path/to/alpn-boot-8.1.3.v20150130.jar</argument>
<argument>-classpath</argument>
<classpath/>
<argument>com.example.Client</argument>
</arguments>
</configuration>
</plugin>
</plugins>
</build>
执行此命令后:
mvn clean compile exec:exec
尝试连接到 https://webtide.com/(客户端中的默认主机)时，出现此错误.java文件)
I got this error when trying to connect to https://webtide.com/ (the default host in Client.java file)
[INFO] --- exec-maven-plugin:1.4.0:exec (default-cli) @ http2client ---
2015-05-05 13:19:25.499:INFO::main: Logging initialized @153ms
Exception in thread "main" java.util.concurrent.TimeoutException
at org.eclipse.jetty.util.FuturePromise.get(FuturePromise.java:130)
at com.example.Client.main(Client.java:55)
[INFO] --- exec-maven-plugin:1.4.0:exec (default-cli) @ http2client ---
2015-05-05 13:29:12.106:INFO::main: Logging initialized @196ms
Exception in thread "main" java.util.concurrent.TimeoutException
at java.util.concurrent.Phaser.awaitAdvanceInterruptibly(Phaser.java:800)
at com.example.Client.main(Client.java:90)
---更新3 ---
采用另一种方法:当我拉动整个码头项目的所有主分支，然后在jetty.project/jetty-http2/http2-client创建一个Intellij项目时，它就可用于公共服务器 https://webtide.com 和 https://nghttp2.org .但是，当我在自签名证书http2服务器(使用nghttp2 + nginx，驻留在我的虚拟机中)上对其进行测试时，会出现此错误
Take a different approach: When I pull all the master branch of the whole jetty project, and then create an Intellij project at jetty.project/jetty-http2/http2-client then it works for public servers https://webtide.com and https://nghttp2.org . But when I test it on my self-signed certificate http2 server (using nghttp2 + nginx, resided in my virtual machine) then I get this error
2015-05-05 19:05:25.094:INFO::main: Logging initialized @220ms
Exception in thread "main" java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
at org.eclipse.jetty.util.FuturePromise.get(FuturePromise.java:138)
at org.eclipse.jetty.http2.client.Client.main(Client.java:55)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.nio.channels.ClosedChannelException
at org.eclipse.jetty.http2.HTTP2Flusher.append(HTTP2Flusher.java:110)
at org.eclipse.jetty.http2.HTTP2Session.frame(HTTP2Session.java:577)
at org.eclipse.jetty.http2.HTTP2Session.frames(HTTP2Session.java:559)
at org.eclipse.jetty.http2.client.HTTP2ClientConnectionFactory$HTTP2ClientConnection.onOpen(HTTP2ClientConnectionFactory.java:121)
推荐答案
问题中报告的链接显示了Jetty HttpClient的HTTP/2 传输.
The link reported in the question presents a HTTP/2 transport for Jetty's HttpClient.
Jetty的HttpClient向必须使用HTTP 1.0、1.1和2.0的应用程序公开通用的HTTP API，因此HttpClient不公开任何API来接收HTTP/2推送资源，因为这是一种特殊的机制仅限HTTP/2.
Jetty's HttpClient exposes a generic HTTP API to applications that has to work with HTTP 1.0, 1.1 and 2.0 and as such HttpClient does not expose any API to receive HTTP/2 push resources, since these are a peculiar mechanism of HTTP/2 only.
如果您确实想与HTTP/2 API进行交互，则可以使用Jetty的HTTP2Client，它向应用程序公开了一个较低级别的API(特定于HTTP/2).
If you really want to interact with a HTTP/2 API, you can use Jetty's HTTP2Client, which exposes a lower-level API, HTTP/2 specific, to applications.
您可以找到连接到可推送资源的网站的完整示例(在本例中为 https://webtide.com )
You can find a full fledged example of connecting to a website that pushes resources (in this case https://webtide.com) here.
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