Node.js http2session.state用法及代码示例

http2session.state是http2模块内的类http2session的内置应用程序编程接口，用于返回有关Http2Session当前状态的其他信息。

用法:

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当前状态的其他信息。

如何生成私钥和公共证书？

私钥：打开记事本并复制粘贴以下 key ：

现在将文件另存为private-key.pem

公开证书：打开记事本并复制粘贴以下 key ：

现在将文件另存为public-cert.pem

范例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

范例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

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js http2session.state Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。