scripts -> modules

modules/debug_proxy/src/index.js

@@ -0,0 +1,66 @@
+async function sendTelegramMessage(message, botToken, chatId) {
+  const url = `https://api.telegram.org/bot${botToken}/sendMessage`
+  const payload = {
+    chat_id: chatId,
+    text: message,
+  }
+
+  try {
+    const response = await fetch(url, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(payload),
+    })
+
+    if (!response.ok) {
+      console.error('Failed to send message:', await response.text())
+    }
+  } catch (error) {
+    console.error('Error sending Telegram message:', error)
+  }
+}
+
+export default {
+  async fetch(request, env, ctx) {
+    const url = new URL(request.url)
+    const userIP = request.headers.get('CF-Connecting-IP')
+
+    if (url.pathname === '/b') {
+      url.pathname = '/styles/bright'
+    }
+
+    // // no failure, just warning
+    // if (request.method !== 'GET') {
+    //   const warningMessage = `Non-GET request ${request.method} ${url.pathname} ${userIP}`
+    //   console.error(warningMessage)
+    //   await sendTelegramMessage(warningMessage, env.TELEGRAM_TOKEN, env.TELEGRAM_CHAT_ID)
+    // }
+
+    if (!url.pathname.startsWith('/styles')) {
+      const errorMessage = 'Bad path'
+      return new Response(errorMessage, { status: 500 })
+    }
+
+    const proxyUrl = new URL(url.pathname, 'https://tiles.openfreemap.org')
+
+    try {
+      const response = await fetch(proxyUrl)
+
+      if (response.status !== 200) {
+        const errorMessage = `Proxy error: Bad status ${response.status} ${url.pathname} ${userIP}`
+        console.error(errorMessage)
+        await sendTelegramMessage(errorMessage, env.TELEGRAM_TOKEN, env.TELEGRAM_CHAT_ID)
+        return new Response('Proxy error: Bad status', { status: 500 })
+      }
+
+      return response
+    } catch (error) {
+      const errorMessage = `Proxy error: ${error.message} ${url.pathname} ${userIP}`
+      console.error(errorMessage)
+      await sendTelegramMessage(errorMessage, env.TELEGRAM_TOKEN, env.TELEGRAM_CHAT_ID)
+      return new Response('Proxy error: Fetch failed', { status: 500 })
+    }
+  },
+}