feat: add cookie support to kijiji scraper

Add optional cookie parameter to bypass bot detection (403 errors).
Cookies can be provided via parameter, KIJIJI_COOKIE env var, or
cookies/kijiji.json file. Supports both JSON array and string formats.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/core/src/scrapers/kijiji.ts

@@ -2,6 +2,11 @@ import cliProgress from "cli-progress";
 import { parseHTML } from "linkedom";
 import unidecode from "unidecode";
 import type { HTMLString } from "../types/common";
+import {
+  type CookieConfig,
+  formatCookiesForHeader,
+  loadCookiesOptional,
+} from "../utils/cookies";
 import { formatCentsToCurrency } from "../utils/format";
 import {
   fetchHtml,
@@ -13,6 +18,14 @@ import {
   ValidationError,
 } from "../utils/http";
 
+// Kijiji cookie configuration
+const KIJIJI_COOKIE_CONFIG: CookieConfig = {
+  name: "Kijiji",
+  domain: ".kijiji.ca",
+  envVar: "KIJIJI_COOKIE",
+  filePath: "./cookies/kijiji.json",
+};
+
 // ----------------------------- Types -----------------------------
 
 type SearchListing = {
@@ -110,6 +123,7 @@ export interface SearchOptions {
   maxPages?: number; // Default: 5
   priceMin?: number;
   priceMax?: number;
+  cookies?: string; // Optional: Cookie string or JSON (helps bypass bot detection)
 }
 
 export interface ListingFetchOptions {
@@ -691,6 +705,16 @@ export default async function fetchKijijiItems(
 ) {
   const DELAY_MS = Math.max(1, Math.floor(1000 / REQUESTS_PER_SECOND));
 
+  // Load Kijiji cookies (optional - helps bypass bot detection)
+  const cookies = await loadCookiesOptional(
+    KIJIJI_COOKIE_CONFIG,
+    searchOptions.cookies,
+  );
+  const cookieHeader =
+    cookies.length > 0
+      ? formatCookiesForHeader(cookies, "www.kijiji.ca")
+      : undefined;
+
   // Set defaults for configuration
   const finalSearchOptions: Required<SearchOptions> = {
     location: searchOptions.location ?? 1700272, // Default to GTA
@@ -701,6 +725,7 @@ export default async function fetchKijijiItems(
     maxPages: searchOptions.maxPages ?? 5, // Default to 5 pages
     priceMin: searchOptions.priceMin as number,
     priceMax: searchOptions.priceMax as number,
+    cookies: searchOptions.cookies ?? "",
   };
 
   const finalListingOptions: Required<ListingFetchOptions> = {
@@ -733,6 +758,7 @@ export default async function fetchKijijiItems(
           );
         }
       },
+      headers: cookieHeader ? { cookie: cookieHeader } : undefined,
     });
 
     const searchResults = parseSearch(searchHtml, BASE_URL);
@@ -782,6 +808,7 @@ export default async function fetchKijijiItems(
                 );
               }
             },
+            headers: cookieHeader ? { cookie: cookieHeader } : undefined,
           });
           const parsed = await parseDetailedListing(
             html,