Node.js http2session.localSettings 方法

http2session.localSettings是 http2 模块中 http2session 类的内置应用程序编程接口，用于获取描述此 Http2Session 当前本地设置的无原型对象。

句法：

const http2session.localSettings

参数：此方法不接受任何参数。

返回值：此方法返回一个无原型对象，描述此 Http2Session 的当前本地设置。

如何生成私钥和公共证书

私钥

步骤 - 1：打开记事本并复制粘贴以下密钥

第 2 步：另存为private-key.pem

公共证书

步骤 - 1：打开记事本并复制粘贴以下密钥

第 2 步：另存为public-cert.pem

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// http2session.localSettings 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() api
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 local setting by
   // using localSetting API
   const status = http2session.localSettings;
 
   stream.end("Max header size : "
     + status.maxHeaderListSize);
 
  // 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");
  })
   
});

Javascript

// Node.js program to demonstrate the
// http2session.localSettings 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() api
const server = http2.createServer(options);
 
server.on('stream', (stream, requestHeaders) => {
 
   // Getting session object
   // by using session api
   const http2session = stream.session;
 
   // Getting local setting by
   // using localSetting API
   const status = http2session.localSettings;
 
   stream.end("header table size : "
      + status.headerTableSize);
 
  // 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");
  })
});

输出：

status : 200
Received: hello
Received: Max header size : 4294967295
client localSettings
server localSettings

使用以下命令运行 index.js 文件：

node index.js

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// http2session.localSettings 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() api
const server = http2.createServer(options);
 
server.on('stream', (stream, requestHeaders) => {
 
   // Getting session object
   // by using session api
   const http2session = stream.session;
 
   // Getting local setting by
   // using localSetting API
   const status = http2session.localSettings;
 
   stream.end("header table size : "
      + status.headerTableSize);
 
  // 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");
  })
});

输出：

Received: header table size: 4096
client destroyed
server destroyed

使用以下命令运行 index.js 文件：

节点索引.js

参考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2session_localsettings