Node.js http2session.state 方法

http2session.state是 http2 模块中 http2session 类的内置应用程序编程接口，用于返回有关 Http2Session 当前状态的各种信息。

句法：

const http2session.state

参数：此方法不接受任何参数。

返回值：此方法返回有关 Http2Session 当前状态的各种信息。

如何生成私钥和公钥证书？

1. 私钥：打开记事本并复制粘贴以下密钥：

   -----BEGIN RSA PRIVATE KEY-----
   MIICXQIBAAKBgQC38R9wXcUbhOd44FavgmE5R3K4JeYOHLnI7dUq1B8/Gv7l3SOg
   JKef/m9gM1KvUx951mapXGtcWgwB08J3vUE2YOZ4tWJArrVZES0BI/RmFAyhQFP5
   HcWl3LSM9LRihP98F33oIkKaCxA5LxOrkgpV4HrUzIKTABDYah7RPex1WQIDAQAB
   AoGBAIXR71xxa9gUfc5L7+TqBs+EMmrUb6Vusp8CoGXzQvRHMJCMrMFySV0131Nu
   o0YYRDsAh1nJefYLMNcXd1BjqI+qY8IeRsxaY+9CB2KKGVVDO2uLdurdC2ZdlWXT
   Vwr3dDoyR0trnXJMmH2ijTeO6bush8HuXxvxJBjvEllM5QYxAkEA3jwny9JP+RFu
   0rkqPBe/wi5pXpPl7PUtdNAGrh6S5958wUoR4f9bvwmTBv1nQzExKWu4EIp+7vjJ
   fBeRZhnBvQJBANPjjge8418PS9zAFyKlITq6cxmM4gOWeveQZwXVNvav0NH+OKdQ
   sZnnDiG26JWmnD/B8Audu97LcxjxcWI8Jc0CQEYA5PhLU229lA9EzI0JXhoozIBC
   TlcKFDuLm88VSmlHqDyqvF9YNOpEdc/p2rFLuZS2ndB4D+vu6mjwc5iZ3HECQCxy
   GBHRclQ3Ti9w76lpv+2kvI4IekRMZWDWnnWfwta+DGxwCgw2pfpleBZkWqdBepb5
   JFQbcxQJ0wvRYXo8qaUCQQCgTvWswBj6OTP7LTvBlU1teAN2Lnrk/N5AYHZIXW6m
   nUG9lYvH7DztWDTioXMrruPF7bdXfZOVJD8t0I4OUzvC
   -----END RSA PRIVATE KEY-----
   

   现在将文件保存为private-key.pem

2. 公共证书：打开记事本并复制粘贴以下密钥：

   -----BEGIN CERTIFICATE-----
   MIICfzCCAegCCQDxxeXw914Y2DANBgkqhkiG9w0BAQsFADCBgzELMAkGA1UEBhMC
   SU4xEzARBgNVBAgMCldlc3RiZW5nYWwxEDAOBgNVBAcMB0tvbGthdGExFDASBgNV
   BAoMC1BhbmNvLCBJbmMuMRUwEwYDVQQDDAxSb2hpdCBQcmFzYWQxIDAeBgkqhkiG
   9w0BCQEWEXJvZm9mb2ZAZ21haWwuY29tMB4XDTIwMDkwOTA1NTExN1oXDTIwMTAw
   OTA1NTExN1owgYMxCzAJBgNVBAYTAklOMRMwEQYDVQQIDApXZXN0YmVuZ2FsMRAw
   DgYDVQQHDAdLb2xrYXRhMRQwEgYDVQQKDAtQYW5jbywgSW5jLjEVMBMGA1UEAwwM
   Um9oaXQgUHJhc2FkMSAwHgYJKoZIhvcNAQkBFhFyb2ZvZm9mQGdtYWlsLmNvbTCB
   nzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAt/EfcF3FG4TneOBWr4JhOUdyuCXm
   Dhy5yO3VKtQfPxr+5d0joCSnn/5vYDNSr1MfedZmqVxrXFoMAdPCd71BNmDmeLVi
   QK61WREtASP0ZhQMoUBT+R3Fpdy0jPS0YoT/fBd96CJCmgsQOS8Tq5IKVeB61MyC
   kwAQ2Goe0T3sdVkCAwEAATANBgkqhkiG9w0BAQsFAAOBgQATe6ixdAjoV7BSHgRX
   bXM2+IZLq8kq3s7ck0EZrRVhsivutcaZwDXRCCinB+OlPedbzXwNZGvVX0nwPYHG
   BfiXwdiuZeVJ88ni6Fm6RhoPtu2QF1UExfBvSXuMBgR+evp+e3QadNpGx6Ppl1aC
   hWF6W2H9+MAlU7yvtmCQQuZmfQ==
   -----END CERTIFICATE-----
   

   现在将文件保存为public-cert.pem

示例 1：文件名：index.js

// Node.js program to demonstrate the
// http2session.state method
  
const http2 = require('http2');
const fs = require('fs');
  
// Private key and public certificate
// for access
const options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem'),
};
  
// Creating and initializing server
// by using http2.createServer() method
const server = http2.createServer(options);
  
server.on('stream', (stream, requestHeaders) => {
    stream.respond({ 
        ':status': 200, 
        'content-type': 'text/plain' 
    });
      
    stream.write('hello ');
  
    const http2session = stream.session;
  
    // Getting state associated with this 
    // session by using state method
    const status = http2session.state;
  
    stream.end("local window size : " 
        + status.localWindowSize);
  
    // Stopping the server
    // by using the close() method
    server.close(() => {
        console.log("server localSettings");
    })
});
  
server.listen(8000);
  
// Creating and initializing client
// by using tls.connect() method
const client = http2.connect(
        'http://localhost:8000');
  
const req = client.request({ 
    ':method': 'GET', 
    ':path': '/' 
});
  
req.on('response', (responseHeaders) => {
    console.log("status : " 
        + responseHeaders[":status"]);
});
  
req.on('data', (data) => {
    console.log('Received: %s ',
        data.toString().replace(/(\n)/gm, ""));
});
  
req.on('end', () => {
    client.close(() => {
        console.log("client localSettings");
    })
});

使用以下命令运行 index.js 文件：

node index.js

输出：

status : 200
Received: hello
Received: local window size : 65535
client localSettings
server localSettings

示例 2：文件名：index.js

// Node.js program to demonstrate the
// http2session.state method
  
const http2 = require('http2');
const fs = require('fs');
  
// Private key and public certificate
// for access
const options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem'),
};
  
// Creating and initializing server
// by using http2.createServer() method
const server = http2.createServer(options);
  
server.on('stream', (stream, requestHeaders) => {
  
    // Getting session object
    // by using session method
    const http2session = stream.session;
  
    // Getting state associated with this
    // session by using state method
    const status = http2session.state;
  
    stream.end("numeric id of recent data : " 
            + status.lastProcStreamID);
  
    // Stopping the server
    // by using the close() method
    server.close(() => {
        console.log("server destroyed");
    })
});
  
server.listen(8000);
  
// Creating and initializing client
// by using tls.connect() method
const client = http2.connect(
        'http://localhost:8000');
  
const req = client.request({ 
    ':method': 'GET', 
    ':path': '/' 
});
  
req.on('data', (data) => {
    console.log('Received: %s ',
        data.toString().replace(/(\n)/gm, ""));
});
  
req.on('end', () => {
    client.close(() => {
        console.log("client destroyed");
    })
});

使用以下命令运行 index.js 文件：

node index.js

输出：

Received: numeric id of recent data : 1
client destroyed
server destroyed

参考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2session_state