The clienthttp2session.request() is an inbuilt application programming interface of class ClientHttp2Session within http2 module which is used to return the object of ClientHttp2Stream.
Syntax:
const clienthttp2session.request(headers[, options])
Parameters: This method takes the following argument as a parameter.
- header: Header object.
- options: It takes any of the arguments {endStream, exclusive, parent, weight, waitForTrailers}
Return Value: This method returns the object of ClientHttp2Stream.
How to generate private key and public certificate?
Private key:
Step — 1: Open notepad and copy and paste the following key.
-----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-----
Step — 2: Save as private-key.pem
Public certificate
Step — 1: Open notepad and copy and paste the following key
-----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-----
Step — 2: Save as public-cert.pem
Example 1: Filename: index.js
// Node.js program to demonstrate the // clienthttp2session.request() 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( 'session' , (session) => {
// Set origin frame
console.log( "ORIGIN frame is submitted" )
}); server.on( 'stream' , (stream, requestHeaders) => {
// Setting response header to client
// by using respond() method
stream.respond({
':status' : 200,
'content-type' : 'text/plain'
});
stream.write( 'hello ' );
// Checking if header is sent or not
// by using pushAllowed method
const status = stream.pushAllowed;
if (status)
stream.end( "push stream is accepted" );
else
stream.end( "push stream is not accepted" );
// 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( // Getting object of ClientHttp2Stream // by using request() method 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" );
})
}); |
Output:
ORIGIN frame is submitted status : 200 Received: hello Received: push stream is accepted client destroyed server destroyed
Run the index.js file using the following command:
node index.js
Example 2: Filename: index.js
// Node.js program to demonstrate the // clienthttp2session.request() 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) => {
// Setting response header to client
// by using respond() method
stream.respond({
':status' : 200,
'content-type' : 'text/plain'
});
stream.write( 'hello ' );
const session = stream.session;
// Set origin frame
stream.end( "ORIGIN frame is submitted" )
// 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( // Getting object of ClientHttp2Stream // by using request() method 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" );
})
}); |
Output:
status : 200 Received: hello Received: ORIGIN frame is submitted client destroyed server destroyed
Run the index.js file using the following command:
node index.js