oauth: add twitter

api/oauth_twitter_redirect.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+func twitterRedirectHandler(w http.ResponseWriter, r *http.Request) {
+	if twitterClient == nil {
+		logger.Errorf("twitter oauth access attempt without configuration")
+		fmt.Fprintf(w, "error: this website has not configured twitter OAuth")
+		return
+	}
+
+	commenterToken := r.FormValue("commenterToken")
+
+	_, err := commenterGetByCommenterToken(commenterToken)
+	if err != nil && err != errorNoSuchToken {
+		fmt.Fprintf(w, "error: %s\n", err.Error())
+		return
+	}
+
+	cred, err := twitterClient.RequestTemporaryCredentials(nil, os.Getenv("ORIGIN")+"/api/oauth/twitter/callback", nil)
+	if err != nil {
+		logger.Errorf("cannot get temporary twitter credentials: %v", err)
+		fmt.Fprintf(w, "error: %v", errorInternal.Error())
+		return
+	}
+
+	twitterCredMapLock.Lock()
+	twitterCredMap[cred.Token] = twitterOauthState{
+		CommenterToken: commenterToken,
+		Cred:           cred,
+	}
+	twitterCredMapLock.Unlock()
+
+	http.Redirect(w, r, twitterClient.AuthorizationURL(cred, nil), http.StatusFound)
+}