Enabling http2.0 in spring boot

hexiaoming123 2021-02-22 23:23:20
enabling http2.0 http spring boot

HTTP2.0 characteristic

Use HTTP/2 A few points for attention

To use HTTP/2 The following points need to be noted

  1. although HTTP/2 There is no explicit requirement to use TLS, But at present, almost all browsers only support HTTP/2 Over TLS. So we need to make a certificate before using it .
  2. If your project uses tomcat or jetty, They don't directly support HTTP/2, however undertow Sure . For details, please refer to Spring Boot Documents :https://docs.spring.io/spring-boot/docs/2.0.5.RELEASE/reference/htmlsingle/#howto-configure-http2
  3. The certificate we made is not approved by the browser , So there will be safety tips , Cannot be used in production environment .

In this example, we use undertow

Make a certificate

Use JDK Self contained keytool, The certificate type is :PKCS12

keytool -genkey -alias undertow -storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -dname "CN=localhost, OU=localhost, O=localhost, L=Zhengzhou, ST=Henan, C=CN"
 Enter the keystore password :
 Enter the new password again :

The certificate password will be required during execution , Here's the input 123456. After executing the command, a keystore.p12 The file of .

keytool Detailed usage : https://docs.oracle.com/javase/8/docs/technotes/tools/windows/keytool.html
Common certificate format and its description reference :http://www.cnblogs.com/xq1314/archive/2017/12/05/7987216.html

To configure Web Containers

spring boot The default is tomcat, We need to put tomcat remove , And then change to undertow.


If you don't remove tomcat Dependence will always be Tomcat Start as container .

And then I'll take what I just generated keystore.p12 copy to src/main/resources Next . And then in application.yml Configure server information in .

port: 8443 # port 
enabled: true
enabled: true # Enable http2
enabled: true
key-store: classpath:keystore.p12 # Enable http2
key-store-password: 123456 # Certificate password 
key-store-type: PKCS12 # Certificate type 
protocol: TLSv1.2 # Protocol type 
key-alias: undertow

If you start the server , Only support https Of .

@SpringBootApplication public class RabbitmqProducerApplication implements WebServerFactoryCustomizer<UndertowServletWebServerFactory> {  public static void main(String[] args) {  SpringApplication.run(RabbitmqProducerApplication.class, args); } @Override public void customize(UndertowServletWebServerFactory factory) {  factory.addBuilderCustomizers((UndertowBuilderCustomizer) builder -> {  builder.addHttpListener(8080, ""); }); } } 

Add... Here 8080 Port monitoring , Configure the reference :

After startup, you can see the following information printed by the console :

INFO 4288 --- [ main] o.s.b.w.e.u.UndertowServletWebServer : Undertow started on port(s) 8443 (https) 8080 (http) with context path ''


Add a test controller

@RestController @RequestMapping("/log") public class LogController {  private Logger logger = LoggerFactory.getLogger(LogController.class); @GetMapping("/info") public String info() {  logger.info("Info log"); return "info"; } } 

visit :https://localhost:8443/log/info, Observation console protocol by h2, Explain that this request uses HTTP/2 agreement .
 Insert picture description here

Ask again
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Look at two requests size, Once it was 236 Once it was 69, This is because HTTP/2 The head compression technology .

visit :http://localhost:8080/log/info, Looking at the console, you can see that you are still using HTTP/1.1 agreement
 Insert picture description here
And packets are better than HTTP/2 Packet size of , And no matter how many times , The size is constant .


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