fix(livestream): Enable custom livestream host (#26106)

frontend/src/lib/utils/apiHost.ts

@@ -1,3 +1,5 @@
+import { getAppContext } from './getAppContext';
+
 export function apiHostOrigin(): string {
     const appOrigin = window.location.origin
     if (appOrigin === 'https://us.posthog.com') {
@@ -10,6 +12,8 @@ export function apiHostOrigin(): string {
 
 export function liveEventsHostOrigin(): string | null {
     const appOrigin = window.location.origin
+    const appContext = getAppContext()
+
     if (appOrigin === 'https://us.posthog.com') {
         return 'https://live.us.posthog.com'
     } else if (appOrigin === 'https://eu.posthog.com') {
@@ -19,6 +23,6 @@ export function liveEventsHostOrigin(): string | null {
     } else if (process.env.STORYBOOK) {
         return 'http://localhost:6006'
     }
-
-    return 'http://localhost:8666'
+  
+    return appContext?.livestream_host || 'http://localhost:8666'
 }

frontend/src/types.ts

@@ -3455,6 +3455,7 @@ export interface AppContext {
     year_in_hog_url?: string
     /** Support flow aid: a staff-only list of users who may be impersonated to access this resource. */
     suggested_users_with_access?: UserBasicType[]
+    livestream_host?: string
 }
 
 export type StoredMetricMathOperations = 'max' | 'min' | 'sum'

posthog/utils.py

@@ -349,6 +349,8 @@ def render_template(
         context["sentry_environment"] = sentry_environment
     if stripe_public_key := os.environ.get("STRIPE_PUBLIC_KEY"):
         context["stripe_public_key"] = stripe_public_key
+    if livestream_host := os.environ.get("LIVESTREAM_HOST"):
+        context["livestream_host"] = livestream_host
 
     context["git_rev"] = get_git_commit_short()  # Include commit in prod for the `console.info()` message
     if settings.DEBUG and not settings.TEST:
@@ -411,6 +413,7 @@ def render_template(
             "switched_team": getattr(request, "switched_team", None),
             "suggested_users_with_access": getattr(request, "suggested_users_with_access", None),
             "commit_sha": context["git_rev"],
+            "livestream_host": context["livestream_host"],
             **posthog_app_context,
         }