oauth2_proxy/main.go
2012-12-10 20:59:23 -05:00

91 lines
3.1 KiB
Go

package main
import (
"flag"
"log"
"net"
"net/http"
"net/url"
"strings"
"fmt"
)
const VERSION = "0.0.1"
var (
showVersion = flag.Bool("version", false, "print version string")
httpAddr = flag.String("http-address", "0.0.0.0:4180", "<addr>:<port> to listen on for HTTP clients")
redirectUrl = flag.String("redirect-url", "", "the OAuth Redirect URL. ie: \"https://internalapp.yourcompany.com/oauth2/callback\"")
clientID = flag.String("client-id", "", "the Google OAuth Client ID: ie: \"123456.apps.googleusercontent.com\"")
clientSecret = flag.String("client-secret", "", "the OAuth Client Secret")
passBasicAuth = flag.Bool("pass-basic-auth", true, "pass HTTP Basic Auth information to upstream")
htpasswdFile = flag.String("htpasswd-file", "", "additionally authenticate against a htpasswd file. Entries must be created with \"htpasswd -s\" for SHA encryption")
cookieSecret = flag.String("cookie-secret", "", "the seed string for secure cookies")
cookieDomain = flag.String("cookie-domain", "", "an optional cookie domain to force cookies to")
googleAppsDomain = flag.String("google-apps-domain", "", "authenticate against the given google apps domain")
authenticatedEmailsFile = flag.String("authenticated-emails-file", "", "authenticate against emails via file (one per line)")
upstreams = StringArray{}
)
func init() {
flag.Var(&upstreams, "upstream", "the http url(s) of the upstream endpoint. If multiple, routing is based on path")
}
func main() {
flag.Parse()
if *showVersion {
fmt.Printf("google_auth_proxy v%s\n", VERSION)
return
}
if len(upstreams) < 1 {
log.Fatal("missing --upstream")
}
if *cookieSecret == "" {
log.Fatal("missing --cookie-secret")
}
if *clientID == "" {
log.Fatal("missing --client-id")
}
if *clientSecret == "" {
log.Fatal("missing --client-secret")
}
var upstreamUrls []*url.URL
for _, u := range upstreams {
upstreamUrl, err := url.Parse(u)
if err != nil {
log.Fatalf("error parsing --upstream %s", err.Error())
}
upstreamUrls = append(upstreamUrls, upstreamUrl)
}
redirectUrl, err := url.Parse(*redirectUrl)
if err != nil {
log.Fatalf("error parsing --redirect-url %s", err.Error())
}
validator := NewValidator(*googleAppsDomain, *authenticatedEmailsFile)
oauthproxy := NewOauthProxy(upstreamUrls, *clientID, *clientSecret, validator)
oauthproxy.SetRedirectUrl(redirectUrl)
if *googleAppsDomain != "" && *authenticatedEmailsFile == "" {
oauthproxy.SignInMessage = fmt.Sprintf("using a %s email address", *googleAppsDomain)
}
if *htpasswdFile != "" {
oauthproxy.HtpasswdFile = NewHtpasswdFile(*htpasswdFile)
}
listener, err := net.Listen("tcp", *httpAddr)
if err != nil {
log.Fatalf("FATAL: listen (%s) failed - %s", *httpAddr, err.Error())
}
log.Printf("listening on %s", *httpAddr)
server := &http.Server{Handler: oauthproxy}
err = server.Serve(listener)
if err != nil && !strings.Contains(err.Error(), "use of closed network connection") {
log.Printf("ERROR: http.Serve() - %s", err.Error())
}
log.Printf("HTTP: closing %s", listener.Addr().String())
}