41. Notes go language--communication

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41. Notes go language--communication

The I/O core of Go is interface Io.reader and Io.writer.

In go, it is very easy to read (or write) from a file.

Io. Reader

Io. The reader interface is important for the go language. Many (if not all) functions need to pass IO. Reader reads some data as input. To satisfy this interface, you only need to implement a method: Read (P []byte) (n int, err error). The Write is (as you might have guessed) implemented the io.writer of the Write method. If you have your own program or the type in the package implemented IO. Reader or Io.writer interface, then the entire Go standard library can use this type!

Internet

All network-related types and functions can be found in the net package. The most important of these functions is dial. When dial to a remote system, this function returns the Conn interface type, which can be used to send or receive information. The function dial concise abstraction of the network layer and the Transport layer. So IPv4 or ipv6,tcp or UDP can share an interface.