go-multiaddr
multiaddr implementation in go
Multiaddr is a standard way to represent addresses that:
- Support any standard network protocols.
- Self-describe (include protocols).
- Have a binary packed format.
- Have a nice string representation.
- Encapsulate well.
Table of Contents
Install
go get github.com/multiformats/go-multiaddrUsage
Example
Simple
import ma "github.com/multiformats/go-multiaddr"
// construct from a string (err signals parse failure)
m1, err := ma.NewMultiaddr("/ip4/127.0.0.1/udp/1234")
// construct from bytes (err signals parse failure)
m2, err := ma.NewMultiaddrBytes(m1.Bytes())
// true
strings.Equal(m1.String(), "/ip4/127.0.0.1/udp/1234")
strings.Equal(m1.String(), m2.String())
bytes.Equal(m1.Bytes(), m2.Bytes())
m1.Equal(m2)
m2.Equal(m1)Protocols
// get the multiaddr protocol description objects
m1.Protocols()
// []Protocol{
// Protocol{ Code: 4, Name: 'ip4', Size: 32},
// Protocol{ Code: 17, Name: 'udp', Size: 16},
// }En/decapsulate
import ma "github.com/multiformats/go-multiaddr"
m, err := ma.NewMultiaddr("/ip4/127.0.0.1/udp/1234")
// <Multiaddr /ip4/127.0.0.1/udp/1234>
sctpMA, err := ma.NewMultiaddr("/sctp/5678")
m.Encapsulate(sctpMA)
// <Multiaddr /ip4/127.0.0.1/udp/1234/sctp/5678>
udpMA, err := ma.NewMultiaddr("/udp/1234")
m.Decapsulate(udpMA) // up to + inc last occurrence of subaddr
// <Multiaddr /ip4/127.0.0.1>Tunneling
Multiaddr allows expressing tunnels very nicely.
printer, _ := ma.NewMultiaddr("/ip4/192.168.0.13/tcp/80")
proxy, _ := ma.NewMultiaddr("/ip4/10.20.30.40/tcp/443")
printerOverProxy := proxy.Encapsulate(printer)
// /ip4/10.20.30.40/tcp/443/ip4/192.168.0.13/tcp/80
proxyAgain := printerOverProxy.Decapsulate(printer)
// /ip4/10.20.30.40/tcp/443Contribute
Contributions welcome. Please check out the issues.
Check out our contributing document for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS Code of Conduct.
Small note: If editing the README, please conform to the standard-readme specification.
License
MIT © 2014 Juan Batiz-Benet