interface WikipediaImage { source: string; width: number; height: number; } interface WikipediaPageData { title: string; pageId: number; extract: string; image?: WikipediaImage; url: string; } export const fetchWikipediaImage = async (request: Request): Promise => { const url = new URL(request.url); const pageName = url.searchParams.get("title"); const format = url.searchParams.get("format")?.toLowerCase() ?? "text"; if (!pageName) { return new Response("Page name is required", { status: 400 }); } try { const pageData = await getWikipediaPageData(pageName); if (!pageData) { return new Response("Page not found", { status: 404 }); } return formatResponse(pageData, format); } catch (error) { console.error("Error fetching Wikipedia image:", error); return new Response("An error occurred while fetching the image", { status: 500 }); } }; async function enhancedWikipediaSearch(pageName: string): Promise { const apiUrl = new URL("https://en.wikipedia.org/w/api.php"); apiUrl.searchParams.append("action", "query"); apiUrl.searchParams.append("list", "search"); apiUrl.searchParams.append("srsearch", pageName); apiUrl.searchParams.append("srnamespace", "0"); apiUrl.searchParams.append("srlimit", "1"); apiUrl.searchParams.append("format", "json"); const response = await fetch(apiUrl.toString()); const data = await response.json(); if (!data.query || !data.query.search || data.query.search.length === 0) { return null; } return data.query.search[0]; } async function getWikipediaPageData(pageName: string): Promise { const searchResult = await enhancedWikipediaSearch(pageName); if (!searchResult) { return null; } const apiUrl = new URL("https://en.wikipedia.org/w/api.php"); apiUrl.searchParams.append("action", "query"); apiUrl.searchParams.append("titles", searchResult.title); apiUrl.searchParams.append("prop", "pageimages|extracts|info|images|pageprops"); apiUrl.searchParams.append("piprop", "original|name"); apiUrl.searchParams.append("pithumbsize", "1000"); apiUrl.searchParams.append("pilimit", "1"); apiUrl.searchParams.append("exintro", "1"); apiUrl.searchParams.append("explaintext", "1"); apiUrl.searchParams.append("redirects", "1"); apiUrl.searchParams.append("inprop", "url"); apiUrl.searchParams.append("format", "json"); const response = await fetch(apiUrl.toString()); const data = await response.json(); console.log("API Response:", JSON.stringify(data, null, 2)); if (!data.query || !data.query.pages) { return null; } const pages = Object.values(data.query.pages); if (pages.length === 0) { return null; } const page = pages[0] as any; const image = await getImageFromPage(page); return { title: page.title, pageId: page.pageid, extract: page.extract || "No description available.", image: image, url: page.fullurl, }; } async function getImageFromPage(page: any): Promise { console.log("Page data:", JSON.stringify(page, null, 2)); // Check for page_image in pageprops (this is usually the main image) if (page.pageprops && page.pageprops.page_image) { const imageData = await getImageInfo(page.pageprops.page_image); if (imageData) return imageData; } // If no main image found, try the original image if (page.original) { return { source: page.original.source, width: page.original.width, height: page.original.height, }; } // If still no image, try the images array if (page.images && page.images.length > 0) { for (const image of page.images) { const imageData = await getImageInfo(image.title); if (imageData) return imageData; } } console.log("No image found for the page."); return undefined; } async function getImageInfo(filename: string): Promise { // Remove 'File:' prefix if it exists filename = filename.replace(/^File:/, ""); const apiUrl = new URL("https://en.wikipedia.org/w/api.php"); apiUrl.searchParams.append("action", "query"); apiUrl.searchParams.append("titles", `File:${filename}`); apiUrl.searchParams.append("prop", "imageinfo"); apiUrl.searchParams.append("iiprop", "url|size"); apiUrl.searchParams.append("format", "json"); const response = await fetch(apiUrl.toString()); const data = await response.json(); console.log("Image info response:", JSON.stringify(data, null, 2)); const pages = Object.values(data.query.pages); if (pages.length > 0) { const page = pages[0] as any; if (page.imageinfo && page.imageinfo[0]) { const imageInfo = page.imageinfo[0]; return { source: imageInfo.url, width: imageInfo.width, height: imageInfo.height, }; } } console.log("No image info found for:", filename); return undefined; } function formatResponse( pageData: WikipediaPageData, format: string, ): Response { const responseData = { imageUrl: pageData.image ? pageData.image.source : "No image available", pageTitle: pageData.title, pageUrl: pageData.url, extract: pageData.extract, }; console.log("Response data:", JSON.stringify(responseData, null, 2)); switch (format) { case "json": return new Response(JSON.stringify(responseData), { headers: { "Content-Type": "application/json" }, }); case "html": const htmlContent = `

${responseData.pageTitle}

${ responseData.imageUrl !== "No image available" ? `

` : "

No image available

" }

${responseData.extract}

Source: ${responseData.pageTitle} on Wikipedia

`; return new Response(htmlContent, { headers: { "Content-Type": "text/html" }, }); default: return new Response(responseData.imageUrl, { headers: { "Content-Type": "text/plain" }, }); } }

WikiImage