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Deno.Conn - Deno documentation
interface Deno.Conn
extends Disposable

Type Parameters

A extends Addr = Addr

Properties

readonly
localAddr: A

The local address of the connection.

readonly
remoteAddr: A

The remote address of the connection.

readonly
readable: ReadableStream<Uint8Array>
readonly
writable: WritableStream<Uint8Array>

Methods

read(p: Uint8Array): Promise<number | null>

Read the incoming data from the connection into an array buffer (p).

Resolves to either the number of bytes read during the operation or EOF (null) if there was nothing more to read.

It is possible for a read to successfully return with 0 bytes. This does not indicate EOF.

It is not guaranteed that the full buffer will be read in a single call.

// If the text "hello world" is received by the client:
const conn = await Deno.connect({ hostname: "example.com", port: 80 });
const buf = new Uint8Array(100);
const numberOfBytesRead = await conn.read(buf); // 11 bytes
const text = new TextDecoder().decode(buf);  // "hello world"
write(p: Uint8Array): Promise<number>

Write the contents of the array buffer (p) to the connection.

Resolves to the number of bytes written.

It is not guaranteed that the full buffer will be written in a single call.

const conn = await Deno.connect({ hostname: "example.com", port: 80 });
const encoder = new TextEncoder();
const data = encoder.encode("Hello world");
const bytesWritten = await conn.write(data); // 11
close(): void

Closes the connection, freeing the resource.

const conn = await Deno.connect({ hostname: "example.com", port: 80 });

// ...

conn.close();
closeWrite(): Promise<void>

Shuts down (shutdown(2)) the write side of the connection. Most callers should just use close().

ref(): void

Make the connection block the event loop from finishing.

Note: the connection blocks the event loop from finishing by default. This method is only meaningful after .unref() is called.

unref(): void

Make the connection not block the event loop from finishing.

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