From cdf588ae28284f0d447d5f0a1ca525a603197fed Mon Sep 17 00:00:00 2001
From: Sunita Prajapati <sprajapati@twilio.com>
Date: Fri, 31 Jan 2025 15:45:03 +0530
Subject: [PATCH] fix: Unable to configure Custom Domain for React-Native

---
 packages/core/src/analytics.ts                | 28 +++++++++++--------
 packages/core/src/constants.ts                |  4 +--
 .../core/src/plugins/SegmentDestination.ts    |  4 +--
 packages/core/src/util.ts                     |  5 ++++
 4 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/packages/core/src/analytics.ts b/packages/core/src/analytics.ts
index 374b4b9e..3fbe1c28 100644
--- a/packages/core/src/analytics.ts
+++ b/packages/core/src/analytics.ts
@@ -57,7 +57,12 @@ import {
   UserInfoState,
   UserTraits,
 } from './types';
-import { allSettled, getPluginsWithFlush, getPluginsWithReset } from './util';
+import {
+  allSettled,
+  getPluginsWithFlush,
+  getPluginsWithReset,
+  getURL,
+} from './util';
 import { getUUID } from './uuid';
 import type { FlushPolicy } from './flushPolicies';
 import {
@@ -160,15 +165,13 @@ export class SegmentClient {
     if (ofType !== undefined) {
       return [...(plugins[ofType] ?? [])];
     }
-    return (
-      [
-        ...this.getPlugins(PluginType.before),
-        ...this.getPlugins(PluginType.enrichment),
-        ...this.getPlugins(PluginType.utility),
-        ...this.getPlugins(PluginType.destination),
-        ...this.getPlugins(PluginType.after),
-      ]
-    );
+    return [
+      ...this.getPlugins(PluginType.before),
+      ...this.getPlugins(PluginType.enrichment),
+      ...this.getPlugins(PluginType.utility),
+      ...this.getPlugins(PluginType.destination),
+      ...this.getPlugins(PluginType.after),
+    ];
   }
 
   /**
@@ -320,10 +323,11 @@ export class SegmentClient {
 
   async fetchSettings() {
     const settingsPrefix: string = this.config.cdnProxy ?? settingsCDN;
-    const settingsEndpoint = `${settingsPrefix}/${this.config.writeKey}/settings`;
+    const settingsEndpoint = `/projects/${this.config.writeKey}/settings`;
+    const settingsURL = getURL(settingsPrefix, settingsEndpoint);
 
     try {
-      const res = await fetch(settingsEndpoint, {
+      const res = await fetch(settingsURL, {
         headers: {
           'Cache-Control': 'no-cache',
         },
diff --git a/packages/core/src/constants.ts b/packages/core/src/constants.ts
index a9dd5b87..fed45d0e 100644
--- a/packages/core/src/constants.ts
+++ b/packages/core/src/constants.ts
@@ -1,8 +1,8 @@
 import type { Config } from './types';
 
-export const defaultApiHost = 'https://api.segment.io/v1/b';
+export const defaultApiHost = 'api.segment.io/v1';
 
-export const settingsCDN = 'https://cdn-settings.segment.com/v1/projects';
+export const settingsCDN = 'cdn-settings.segment.com/v1';
 
 export const defaultConfig: Config = {
   writeKey: '',
diff --git a/packages/core/src/plugins/SegmentDestination.ts b/packages/core/src/plugins/SegmentDestination.ts
index b3717b8e..cc9dc007 100644
--- a/packages/core/src/plugins/SegmentDestination.ts
+++ b/packages/core/src/plugins/SegmentDestination.ts
@@ -6,7 +6,7 @@ import {
   SegmentEvent,
   UpdateType,
 } from '../types';
-import { chunk, createPromise } from '../util';
+import { chunk, createPromise, getURL } from '../util';
 import { uploadEvents } from '../api';
 import type { SegmentClient } from '../analytics';
 import { DestinationMetadataEnrichment } from './DestinationMetadataEnrichment';
@@ -90,7 +90,7 @@ export class SegmentDestination extends DestinationPlugin {
 
   private getEndpoint(): string {
     const config = this.analytics?.getConfig();
-    return config?.proxy ?? this.apiHost ?? defaultApiHost;
+    return getURL(config?.proxy ?? this.apiHost ?? defaultApiHost, '/b');
   }
 
   configure(analytics: SegmentClient): void {
diff --git a/packages/core/src/util.ts b/packages/core/src/util.ts
index c2e2ccca..106c57f0 100644
--- a/packages/core/src/util.ts
+++ b/packages/core/src/util.ts
@@ -257,3 +257,8 @@ export const createPromise = <T>(
     resolve: resolver!,
   };
 };
+
+export function getURL(host: string, path: string) {
+  const s = `https://${host}${path}`;
+  return s;
+}