border/goauth2-example.go

## goauth2-example.go
package main

import (
	"code.google.com/p/goauth2/oauth"
	"crypto/tls"
	"io/ioutil"
	"log"
	"net/http"
	"text/template"
)

var notAuthenticatedTemplate = template.Must(template.New("").Parse(`
<html><body>
You have currently not given permissions to access your data. Please authenticate this app with the Google OAuth provider.
<form action="/authorize" method="POST"><input type="submit" value="Ok, authorize this app with my id"/></form>
</body></html>
`))

var userInfoTemplate = template.Must(template.New("").Parse(`
<html><body>
This app is now authenticated to access your Google user info.  Your details are:<br />
{{.}}
</body></html>
`))

// variables used during oauth protocol flow of authentication
var (
	code  = ""
	token = ""
)

var oauthCfg = &oauth.Config{
	//TODO: put your project's Client Id here.  To be got from https://code.google.com/apis/console
	ClientId: "531571078206.apps.googleusercontent.com",

	//TODO: put your project's Client Secret value here https://code.google.com/apis/console
	ClientSecret: "jgZSS8pDBKQb8Mzm4gB0XnJ1",

	//For Google's oauth2 authentication, use this defined URL
	AuthURL: "https://accounts.google.com/o/oauth2/auth",

	//For Google's oauth2 authentication, use this defined URL
	TokenURL: "https://accounts.google.com/o/oauth2/token",

	//To return your oauth2 code, Google will redirect the browser to this page that you have defined
	//TODO: This exact URL should also be added in your Google API console for this project within "API Access"->"Redirect URIs"
	RedirectURL: "http://127.0.0.1:8080/oauth2callback",

	//This is the 'scope' of the data that you are asking the user's permission to access. For getting user's info, this is the url that Google has defined.
	Scope: "https://www.googleapis.com/auth/userinfo.profile",
}

//This is the URL that Google has defined so that an authenticated application may obtain the user's info in json format
const profileInfoURL = "https://www.googleapis.com/auth2/v1/userinfo"
const port = ":8080"

func main() {
	http.HandleFunc("/", handleRoot)
	http.HandleFunc("/authorize", handleAuthorize)

	//Google will redirect to this page to return your code, so handle it appropriately
	http.HandleFunc("/oauth2callback", handleOAuth2Callback)

	log.Println("Listen On: " + port)
	http.ListenAndServe(port, nil)
}

func handleRoot(w http.ResponseWriter, r *http.Request) {
	notAuthenticatedTemplate.Execute(w, nil)
}

// Start the authorization process
func handleAuthorize(w http.ResponseWriter, r *http.Request) {
	//Get the Google URL which shows the Authentication page to the user
	url := oauthCfg.AuthCodeURL("")

	//redirect user to that page
	http.Redirect(w, r, url, http.StatusFound)
}

// Function that handles the callback from the Google server
func handleOAuth2Callback(w http.ResponseWriter, r *http.Request) {
	//Get the code from the response
	code := r.FormValue("code")

	t := &oauth.Transport{oauth.Config: oauthCfg}

	// Exchange the received code for a token
	tok, _ := t.Exchange(code)

	{
		tokenCache := oauth.CacheFile("./request.token")

		err := tokenCache.PutToken(tok)
		if err != nil {
			log.Fatal("Cache write:", err)
		}
		log.Printf("Token is cached in %v\n", tokenCache)
	}

	// Skip TLS Verify
	t.Transport = &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}

	// Make the request.
	req, err := t.Client().Get(profileInfoURL)
	if err != nil {
		log.Fatal("Request Error:", err)
	}
	defer req.Body.Close()

	body, _ := ioutil.ReadAll(req.Body)

	log.Println(string(body))
	userInfoTemplate.Execute(w, string(body))
}
	package main

	import (
	"code.google.com/p/goauth2/oauth"
	"crypto/tls"
	"io/ioutil"
	"log"
	"net/http"
	"text/template"
	)

	var notAuthenticatedTemplate = template.Must(template.New("").Parse(`
	<html><body>
	You have currently not given permissions to access your data. Please authenticate this app with the Google OAuth provider.
	<form action="/authorize" method="POST"><input type="submit" value="Ok, authorize this app with my id"/></form>
	</body></html>
	`))

	var userInfoTemplate = template.Must(template.New("").Parse(`
	<html><body>
	This app is now authenticated to access your Google user info. Your details are:<br />
	{{.}}
	</body></html>
	`))

	// variables used during oauth protocol flow of authentication
	var (
	code = ""
	token = ""
	)

	var oauthCfg = &oauth.Config{
	//TODO: put your project's Client Id here. To be got from https://code.google.com/apis/console
	ClientId: "531571078206.apps.googleusercontent.com",

	//TODO: put your project's Client Secret value here https://code.google.com/apis/console
	ClientSecret: "jgZSS8pDBKQb8Mzm4gB0XnJ1",

	//For Google's oauth2 authentication, use this defined URL
	AuthURL: "https://accounts.google.com/o/oauth2/auth",

	//For Google's oauth2 authentication, use this defined URL
	TokenURL: "https://accounts.google.com/o/oauth2/token",

	//To return your oauth2 code, Google will redirect the browser to this page that you have defined
	//TODO: This exact URL should also be added in your Google API console for this project within "API Access"->"Redirect URIs"
	RedirectURL: "http://127.0.0.1:8080/oauth2callback",

	//This is the 'scope' of the data that you are asking the user's permission to access. For getting user's info, this is the url that Google has defined.
	Scope: "https://www.googleapis.com/auth/userinfo.profile",
	}

	//This is the URL that Google has defined so that an authenticated application may obtain the user's info in json format
	const profileInfoURL = "https://www.googleapis.com/auth2/v1/userinfo"
	const port = ":8080"

	func main() {
	http.HandleFunc("/", handleRoot)
	http.HandleFunc("/authorize", handleAuthorize)

	//Google will redirect to this page to return your code, so handle it appropriately
	http.HandleFunc("/oauth2callback", handleOAuth2Callback)

	log.Println("Listen On: " + port)
	http.ListenAndServe(port, nil)
	}

	func handleRoot(w http.ResponseWriter, r *http.Request) {
	notAuthenticatedTemplate.Execute(w, nil)
	}

	// Start the authorization process
	func handleAuthorize(w http.ResponseWriter, r *http.Request) {
	//Get the Google URL which shows the Authentication page to the user
	url := oauthCfg.AuthCodeURL("")

	//redirect user to that page
	http.Redirect(w, r, url, http.StatusFound)
	}

	// Function that handles the callback from the Google server
	func handleOAuth2Callback(w http.ResponseWriter, r *http.Request) {
	//Get the code from the response
	code := r.FormValue("code")

	t := &oauth.Transport{oauth.Config: oauthCfg}

	// Exchange the received code for a token
	tok, _ := t.Exchange(code)

	{
	tokenCache := oauth.CacheFile("./request.token")

	err := tokenCache.PutToken(tok)
	if err != nil {
	log.Fatal("Cache write:", err)
	}
	log.Printf("Token is cached in %v\n", tokenCache)
	}

	// Skip TLS Verify
	t.Transport = &http.Transport{
	TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}

	// Make the request.
	req, err := t.Client().Get(profileInfoURL)
	if err != nil {
	log.Fatal("Request Error:", err)
	}
	defer req.Body.Close()

	body, _ := ioutil.ReadAll(req.Body)

	log.Println(string(body))
	userInfoTemplate.Execute(w, string(body))
	}