Node.js http2stream.setTimeout() 方法

http2stream.setTimeout()方法是 http2 模块中类 Http2Stream 的内置应用程序编程接口，用于设置特定操作将发生的时间的持续时间。

句法：

const http2stream.setTimeout(msecs, callback)

参数：该方法取duration的整数值。

返回值：此方法只返回一个用于在超时后开始特定活动的回调函数。

如何生成私钥和公钥证书？

私钥：打开记事本并复制粘贴以下密钥：

现在将文件保存为private-key.pem
公共证书：打开记事本并复制粘贴以下密钥：

现在将文件保存为public-cert.pem

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// Http2Stream.setTimeout() API
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) => {
 
 
   // setting time out for the stream
   // by using setTimeout()
   stream.setTimeout(3000, ()=>{
     stream.respond({
       ':status': 200,
       'content-type': 'text/plain'
     });
 
     stream.end("surprise !!!");
   })
 
  // 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('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 destroyed");
  })
   
});

Javascript

// Node.js program to demonstrate the
// Http2Stream.setTimeout() API
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 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 destroyed");
  })
 
  // Cancel the stream if there's
  // no activity after 3 seconds
  req.setTimeout(3000, ()=>{
 
    req.close(NGHTTP2_CANCEL);
  })
   
});

输出：

status : 200
Received: surprise !!!
client destroyed
server destroyed

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
// Http2Stream.setTimeout() API
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 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 destroyed");
  })
 
  // Cancel the stream if there's
  // no activity after 3 seconds
  req.setTimeout(3000, ()=>{
 
    req.close(NGHTTP2_CANCEL);
  })
   
});

输出：

events.js:292
throw er; // Unhandled ‘error’ event
^
Error [ERR_HTTP2_STREAM_CANCEL]: The pending stream has been canceled (caused by: connect ECONNREFUSED 127.0.0.1:8000)
at ClientHttp2Session.destroy (internal/http2/core.js:1379:20)
at Socket.socketOnError (internal/http2/core.js:2758:13)
at Socket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21)
Emitted ‘error’ event on ClientHttp2Stream instance at:
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
cause: Error: connect ECONNREFUSED 127.0.0.1:8000
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16) {
errno: ‘ECONNREFUSED’,
code: ‘ECONNREFUSED’,
syscall: ‘connect’,
address: ‘127.0.0.1’,
port: 8000
},
code: ‘ERR_HTTP2_STREAM_CANCEL’
}

编程需要懂一点英语

使用以下命令运行 index.js 文件：

node index.js

参考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2stream_settimeout_msecs_callback