79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
package main
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import (
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"fmt"
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"net/http"
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"github.com/bwmarrin/discordgo"
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"golang.org/x/oauth2"
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)
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const htmlIndex = `<html><body>
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<a href="/discordLogin">Log in with discord</a>
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</body></html>
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`
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var (
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discordOauthConfig = &oauth2.Config{
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RedirectURL: "",
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ClientID: "",
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ClientSecret: "",
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Scopes: []string{"connections",
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"email",
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"identify",
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"guilds"},
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Endpoint: *endp,
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}
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// Some random string, random for each request
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oauthStateString = "random"
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endp = &oauth2.Endpoint{
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AuthURL: "https://discordapp.com/api/oauth2/authorize",
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TokenURL: "https://discordapp.com/api/oauth2/token",
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}
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)
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// startWebServer with the port provided
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func startWebServer(port string, ci string, cs string, redirectURL string) {
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discordOauthConfig.ClientID = ci
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discordOauthConfig.ClientSecret = cs
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discordOauthConfig.RedirectURL = redirectURL + "/discordCallback"
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http.HandleFunc("/", handleMain)
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http.HandleFunc("/discordLogin", handlediscordLogin)
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http.HandleFunc("/discordCallback", handlediscordCallback)
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fmt.Println(http.ListenAndServe(":"+port, nil))
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}
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func handleMain(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, htmlIndex)
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}
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func handlediscordLogin(w http.ResponseWriter, r *http.Request) {
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url := discordOauthConfig.AuthCodeURL(oauthStateString)
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http.Redirect(w, r, url, http.StatusTemporaryRedirect)
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}
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func handlediscordCallback(w http.ResponseWriter, r *http.Request) {
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state := r.FormValue("state")
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if state != oauthStateString {
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fmt.Printf("invalid oauth state, expected '%s', got '%s'\n", oauthStateString, state)
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http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
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return
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}
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code := r.FormValue("code")
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token, err := discordOauthConfig.Exchange(oauth2.NoContext, code)
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if err != nil {
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fmt.Println("Code exchange failed with ", err)
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http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
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return
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}
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dg, err := discordgo.New("Bearer " + token.AccessToken)
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if err != nil {
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fmt.Println("Error while creating discord session: ", err)
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return
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}
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user, _ := dg.User("@me")
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fmt.Fprintf(w, user.Username)
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}
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