dispatch/vendor/github.com/eyedeekay/goSam

goSam

A go library for using the I2P Simple Anonymous Messaging (SAM version 3.0) bridge. It has support for all streaming features SAM version 3.2.

This is widely used and easy to use, but thusfar, mostly by me. It sees a lot of testing and no breaking changes to the API are expected.

Installation

go get github.com/eyedeekay/goSam

Using it for HTTP Transport

Client.Dial implements net.Dial so you can use go's library packages like http.

package main

import (
	"io"
	"log"
	"net/http"
	"os"

	"github.com/cryptix/goSam"
)

func main() {
	// create a default sam client
	sam, err := goSam.NewDefaultClient()
	checkErr(err)

	log.Println("Client Created")

	// create a transport that uses SAM to dial TCP Connections
	tr := &http.Transport{
		Dial: sam.Dial,
	}

	// create  a client using this transport
	client := &http.Client{Transport: tr}

	// send a get request
	resp, err := client.Get("http://stats.i2p/")
	checkErr(err)
	defer resp.Body.Close()

	log.Printf("Get returned %+v\n", resp)

	// create a file for the response
	file, err := os.Create("stats.html")
	checkErr(err)
	defer file.Close()

	// copy the response to the file
	_, err = io.Copy(file, resp.Body)
	checkErr(err)

	log.Println("Done.")
}

func checkErr(err error) {
	if err != nil {
		log.Fatal(err)
	}
}

Using it as a SOCKS proxy

client also implements a resolver compatible with getlantern/go-socks5, making it very easy to implement a SOCKS5 server.

package main

import (
  "flag"

	"github.com/eyedeekay/goSam"
	"github.com/getlantern/go-socks5"
	"log"
)

var (
  samaddr = flag.String("sam", "127.0.0.1:7656", "SAM API address to use")
  socksaddr = flag.String("socks", "127.0.0.1:7675", "SOCKS address to use")
)

func main() {
	sam, err := goSam.NewClient(*samaddr)
	if err != nil {
		panic(err)
	}
	log.Println("Client Created")

	// create a transport that uses SAM to dial TCP Connections
	conf := &socks5.Config{
		Dial:     sam.DialContext,
		Resolver: sam,
	}
	server, err := socks5.New(conf)
	if err != nil {
		panic(err)
	}

	// Create SOCKS5 proxy on localhost port 8000
	if err := server.ListenAndServe("tcp", *socksaddr); err != nil {
		panic(err)
	}
}

.deb package

A package for installing this on Debian is buildable, and a version for Ubuntu is available as a PPA and mirrored via i2p. To build the deb package, from the root of this repository with the build dependencies installed(git, i2p, go, debuild) run the command

    debuild -us -uc

to produce an unsigned deb for personal use only. For packagers,

    debuild -S

will produce a viable source package for use with Launchpad PPA's and other similar systems.

TODO

• Improve recovery on failed sockets
• Implement STREAM FORWARD
• Implement datagrams (Repliable and Anon)