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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.

STATUS: This project is maintained. I will respond to issues, pull requests, and feature requests within a few days. I am primarily maintaining functionality. 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/eyedeekay/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 SAM by default, as a proxy for all HTTP Clients used by a Go application

This will make the SAM transport dialer the default for all HTTP clients. 

package main

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

	"github.com/eyedeekay/goSam"
)

func main() {
	sam, err := goSam.NewDefaultClient()
	checkErr(err)

	log.Println("Client Created")

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

	http.DefaultClient = httpClient
	return nil
}

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

Get the source code:
Show license 
The MIT License (MIT)

Copyright (c) 2014 Henry

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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