api: Add go files

I know this is a huge commit, but I can't be bothered to check this in part by part.
2025-06-29 22:56:37 -04:00 · 2018-05-27 20:10:42 +05:30
parent 60e7e59841
commit a090770b73
95 changed files with 4203 additions and 0 deletions
--- a/api/oauth_google_callback.go
+++ b/api/oauth_google_callback.go
@ -0,0 +1,85 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"golang.org/x/oauth2"
+	"io/ioutil"
+	"net/http"
+)
+
+func googleCallbackHandler(w http.ResponseWriter, r *http.Request) {
+	session := r.FormValue("state")
+	code := r.FormValue("code")
+
+	cs, err := commenterSessionGet(session)
+	if err != nil {
+		fmt.Fprintf(w, "Error: %s\n", err.Error())
+		return
+	}
+
+	if cs.Session != "none" {
+		fmt.Fprintf(w, "Error: %v", errorSessionAlreadyInUse.Error())
+		return
+	}
+
+	token, err := googleConfig.Exchange(oauth2.NoContext, code)
+	if err != nil {
+		fmt.Fprintf(w, "Error: %s", err.Error())
+		return
+	}
+
+	resp, err := http.Get("https://www.googleapis.com/oauth2/v2/userinfo?access_token=" + token.AccessToken)
+	defer resp.Body.Close()
+
+	contents, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Fprintf(w, "Error: %s", errorCannotReadResponse.Error())
+		return
+	}
+
+	user := make(map[string]interface{})
+	if err := json.Unmarshal(contents, &user); err != nil {
+		fmt.Fprintf(w, "Error: %s", errorInternal.Error())
+		return
+	}
+
+	exists, err := commenterIsProviderUser("google", user["email"].(string))
+	if err != nil {
+		fmt.Fprintf(w, "Error: %s", err.Error())
+		return
+	}
+
+	var commenterHex string
+
+	// TODO: in case of returning users, update the information we have on record?
+	if !exists {
+		var email string
+		if _, ok := user["email"]; ok {
+			email = user["email"].(string)
+		} else {
+			fmt.Fprintf(w, "error: %s", errorInvalidEmail.Error())
+			return
+		}
+
+		var link string
+		if val, ok := user["link"]; ok {
+			link = val.(string)
+		} else {
+			link = "undefined"
+		}
+
+		commenterHex, err = commenterNew(email, user["name"].(string), link, user["picture"].(string), "google")
+		if err != nil {
+			fmt.Fprintf(w, "Error: %s", err.Error())
+			return
+		}
+	}
+
+	if err := commenterSessionUpdate(session, commenterHex); err != nil {
+		fmt.Fprintf(w, "Error: %s", err.Error())
+		return
+	}
+
+	fmt.Fprintf(w, "<html><script>window.parent.close()</script></html>")
+}