MM-8681 Adding config settings necessary for using CloudFront. (#8307)

* Adding config settings nessisary for using CloudFront.

* Adding new config settings to diagnostics.

app/config.go

@@ -12,6 +12,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"net/url"
 	"runtime/debug"
 
 	l4g "github.com/alecthomas/log4go"
@@ -254,3 +255,12 @@ func (a *App) Desanitize(cfg *model.Config) {
 		cfg.SqlSettings.DataSourceSearchReplicas[i] = actual.SqlSettings.DataSourceSearchReplicas[i]
 	}
 }
+
+func (a *App) GetCookieDomain() string {
+	if *a.Config().ServiceSettings.AllowCookiesForSubdomains {
+		if siteURL, err := url.Parse(*a.Config().ServiceSettings.SiteURL); err == nil {
+			return siteURL.Hostname()
+		}
+	}
+	return ""
+}

app/diagnostics.go

@@ -243,6 +243,8 @@ func (a *App) trackConfig() {
 		"isdefault_image_proxy_type":                              isDefault(*cfg.ServiceSettings.ImageProxyType, ""),
 		"isdefault_image_proxy_url":                               isDefault(*cfg.ServiceSettings.ImageProxyURL, ""),
 		"isdefault_image_proxy_options":                           isDefault(*cfg.ServiceSettings.ImageProxyOptions, ""),
+		"websocket_url":                                           isDefault(*cfg.ServiceSettings.WebsocketURL, ""),
+		"allow_cookies_for_subdomains":                            *cfg.ServiceSettings.AllowCookiesForSubdomains,
 	})
 
 	a.SendDiagnostic(TRACK_CONFIG_TEAM, map[string]interface{}{

app/login.go

@@ -113,6 +113,7 @@ func (a *App) DoLogin(w http.ResponseWriter, r *http.Request, user *model.User,
 		secure = true
 	}
 
+	domain := a.GetCookieDomain()
 	expiresAt := time.Unix(model.GetMillis()/1000+int64(maxAge), 0)
 	sessionCookie := &http.Cookie{
 		Name:     model.SESSION_COOKIE_TOKEN,
@@ -121,6 +122,7 @@ func (a *App) DoLogin(w http.ResponseWriter, r *http.Request, user *model.User,
 		MaxAge:   maxAge,
 		Expires:  expiresAt,
 		HttpOnly: true,
+		Domain:   domain,
 		Secure:   secure,
 	}
 
@@ -130,6 +132,7 @@ func (a *App) DoLogin(w http.ResponseWriter, r *http.Request, user *model.User,
 		Path:    "/",
 		MaxAge:  maxAge,
 		Expires: expiresAt,
+		Domain:  domain,
 		Secure:  secure,
 	}