fix: use addEventListener for reliable response capture

The previous implementation overrode onreadystatechange directly,
which failed when handlers were set after send() was called.

This fix uses addEventListener('readystatechange', ...) instead,
which reliably captures responses regardless of when other handlers
are attached.

fix: implement custom XHRInterceptor to avoid RN private API warnings

Replace dependency on React Native's internal XHRInterceptor with a
custom implementation that directly patches XMLHttpRequest prototype.

This fixes the deprecation warning in React Native 0.80+:
"Deep imports from the 'react-native' package are deprecated"

The new implementation:
- Patches XMLHttpRequest.prototype.open, send, setRequestHeader
- Captures response headers and body via onreadystatechange
- Properly restores original methods when interception is disabled
- Maintains the same callback API for compatibility with Logger.ts
- Works across all React Native versions without version-specific paths

Author: ignaciotcrespo

src/XHRInterceptor.ts

@@ -1,32 +1,227 @@
-type XHRInterceptorModule = {
-  isInterceptorEnabled: () => boolean;
-  setOpenCallback: (...props: any[]) => void;
-  setRequestHeaderCallback: (...props: any[]) => void;
-  setSendCallback: (...props: any[]) => void;
-  setHeaderReceivedCallback: (...props: any[]) => void;
-  setResponseCallback: (...props: any[]) => void;
-  enableInterception: () => void;
-  disableInterception: () => void;
-};
+// Type declarations for globals provided by React Native runtime
+declare class URL {
+  constructor(url: string, base?: string);
+  toString(): string;
+}
+
+declare class XMLHttpRequest {
+  static readonly UNSENT: number;
+  static readonly OPENED: number;
+  static readonly HEADERS_RECEIVED: number;
+  static readonly LOADING: number;
+  static readonly DONE: number;
+
+  readonly readyState: number;
+  readonly response: any;
+  readonly responseText: string;
+  responseType: string;
+  readonly responseURL: string;
+  readonly status: number;
+  timeout: number;
+
+  onreadystatechange: ((this: XMLHttpRequest, ev: any) => any) | null;
+
+  open(method: string, url: string | URL, async?: boolean, username?: string | null, password?: string | null): void;
+  send(body?: any): void;
+  setRequestHeader(header: string, value: string): void;
+  getResponseHeader(name: string): string | null;
+  getAllResponseHeaders(): string;
+  addEventListener(type: string, listener: (this: XMLHttpRequest, ev: any) => any): void;
+}
+
+// Callback types use 'any' to match React Native's XHRInterceptor API
+// This allows Logger.ts to use its own types (RequestMethod, XHR, etc.)
+type OpenCallback = (...args: any[]) => void;
+type RequestHeaderCallback = (...args: any[]) => void;
+type SendCallback = (...args: any[]) => void;
+type HeaderReceivedCallback = (...args: any[]) => void;
+type ResponseCallback = (...args: any[]) => void;
+
+// Store original XMLHttpRequest methods
+let originalXHROpen: typeof XMLHttpRequest.prototype.open | null = null;
+let originalXHRSend: typeof XMLHttpRequest.prototype.send | null = null;
+let originalXHRSetRequestHeader: typeof XMLHttpRequest.prototype.setRequestHeader | null =
+  null;
+
+// Callbacks
+let openCallback: OpenCallback = () => {};
+let requestHeaderCallback: RequestHeaderCallback = () => {};
+let sendCallback: SendCallback = () => {};
+let headerReceivedCallback: HeaderReceivedCallback = () => {};
+let responseCallback: ResponseCallback = () => {};
 
-let XHRInterceptor: XHRInterceptorModule;
-try {
-  // new location for React Native 0.80+
-  const module = require('react-native/src/private/devsupport/devmenu/elementinspector/XHRInterceptor');
-  XHRInterceptor = module.default ?? module;
-} catch {
-  try {
-    // new location for React Native 0.79+
-    const module = require('react-native/src/private/inspector/XHRInterceptor');
-    XHRInterceptor = module.default ?? module;
-  } catch {
-    try {
-      const module = require('react-native/Libraries/Network/XHRInterceptor');
-      XHRInterceptor = module.default ?? module;
-    } catch {
-      throw new Error('XHRInterceptor could not be found in either location');
+let isInterceptorEnabled = false;
+
+function parseResponseHeaders(headersString: string): Record<string, string> {
+  const headers: Record<string, string> = {};
+  if (!headersString) return headers;
+
+  const headerLines = headersString.trim().split('\r\n');
+  for (const line of headerLines) {
+    const index = line.indexOf(':');
+    if (index > 0) {
+      const key = line.substring(0, index).trim();
+      const value = line.substring(index + 1).trim();
+      headers[key] = value;
     }
   }
+  return headers;
+}
+
+function enableInterception(): void {
+  if (isInterceptorEnabled) return;
+
+  // Store original methods
+  originalXHROpen = XMLHttpRequest.prototype.open;
+  originalXHRSend = XMLHttpRequest.prototype.send;
+  originalXHRSetRequestHeader = XMLHttpRequest.prototype.setRequestHeader;
+
+  // Override open
+  XMLHttpRequest.prototype.open = function (
+    method: string,
+    url: string | URL,
+    async: boolean = true,
+    username?: string | null,
+    password?: string | null
+  ): void {
+    const xhr = this as any;
+    xhr._interception = {
+      method,
+      url: url.toString(),
+    };
+
+    openCallback(method, url.toString(), this);
+
+    return originalXHROpen!.call(
+      this,
+      method,
+      url,
+      async,
+      username ?? null,
+      password ?? null
+    );
+  };
+
+  // Override setRequestHeader
+  XMLHttpRequest.prototype.setRequestHeader = function (
+    header: string,
+    value: string
+  ): void {
+    requestHeaderCallback(header, value, this);
+    return originalXHRSetRequestHeader!.call(this, header, value);
+  };
+
+  // Override send
+  XMLHttpRequest.prototype.send = function (body?: any): void {
+    const xhr = this as any;
+
+    const dataString = body === null || body === undefined ? '' : String(body);
+    sendCallback(dataString, xhr);
+
+    // Use addEventListener which is more reliable than overriding onreadystatechange
+    // This works even when handlers are set after send() is called
+    this.addEventListener('readystatechange', function () {
+      if (this.readyState === XMLHttpRequest.HEADERS_RECEIVED) {
+        if (!xhr._interception?.hasCalledHeaderReceived) {
+          if (xhr._interception) {
+            xhr._interception.hasCalledHeaderReceived = true;
+          }
+          const contentType = this.getResponseHeader('content-type') || '';
+          const contentLength = this.getResponseHeader('content-length');
+          const responseSize = contentLength ? parseInt(contentLength, 10) : 0;
+          const responseHeaders = parseResponseHeaders(
+            this.getAllResponseHeaders()
+          );
+
+          // Set responseHeaders on xhr for compatibility with Logger.ts
+          xhr.responseHeaders = responseHeaders;
+
+          headerReceivedCallback(contentType, responseSize, responseHeaders, xhr);
+        }
+      }
+
+      if (this.readyState === XMLHttpRequest.DONE) {
+        if (!xhr._interception?.hasCalledResponse) {
+          if (xhr._interception) {
+            xhr._interception.hasCalledResponse = true;
+          }
+          let responseData = '';
+          if (this.responseType === '' || this.responseType === 'text') {
+            responseData = this.responseText || '';
+          } else if (this.responseType === 'json' && this.response) {
+            try {
+              responseData = JSON.stringify(this.response);
+            } catch {
+              responseData = '[Unable to stringify response]';
+            }
+          } else if (this.response) {
+            responseData = '[Non-text response]';
+          }
+
+          responseCallback(
+            this.status,
+            this.timeout,
+            responseData,
+            this.responseURL,
+            this.responseType,
+            xhr
+          );
+        }
+      }
+    });
+
+    return originalXHRSend!.call(this, body);
+  };
+
+  isInterceptorEnabled = true;
+}
+
+function disableInterception(): void {
+  if (!isInterceptorEnabled) return;
+
+  // Restore original methods
+  if (originalXHROpen) {
+    XMLHttpRequest.prototype.open = originalXHROpen;
+    originalXHROpen = null;
+  }
+  if (originalXHRSend) {
+    XMLHttpRequest.prototype.send = originalXHRSend;
+    originalXHRSend = null;
+  }
+  if (originalXHRSetRequestHeader) {
+    XMLHttpRequest.prototype.setRequestHeader = originalXHRSetRequestHeader;
+    originalXHRSetRequestHeader = null;
+  }
+
+  // Reset callbacks
+  openCallback = () => {};
+  requestHeaderCallback = () => {};
+  sendCallback = () => {};
+  headerReceivedCallback = () => {};
+  responseCallback = () => {};
+
+  isInterceptorEnabled = false;
 }
 
+const XHRInterceptor = {
+  isInterceptorEnabled: () => isInterceptorEnabled,
+  setOpenCallback: (callback: OpenCallback) => {
+    openCallback = callback;
+  },
+  setRequestHeaderCallback: (callback: RequestHeaderCallback) => {
+    requestHeaderCallback = callback;
+  },
+  setSendCallback: (callback: SendCallback) => {
+    sendCallback = callback;
+  },
+  setHeaderReceivedCallback: (callback: HeaderReceivedCallback) => {
+    headerReceivedCallback = callback;
+  },
+  setResponseCallback: (callback: ResponseCallback) => {
+    responseCallback = callback;
+  },
+  enableInterception,
+  disableInterception,
+};
+
 export default XHRInterceptor;