Add rate limiting to location detection and standardize error messages

Introduces rate limiting to the `detect-location` function and refactors error responses in `upload-image` to provide consistent, descriptive messages.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: b3d7d4df-59a9-4a9c-971d-175b92dadbfa
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/7cdf4e95-3f41-4180-b8e3-8ef56d032c0e/b3d7d4df-59a9-4a9c-971d-175b92dadbfa/1VcvPNb

.replit

@@ -33,3 +33,7 @@ outputType = "webview"
 [[ports]]
 localPort = 5000
 externalPort = 80
+
+[[ports]]
+localPort = 42463
+externalPort = 3000

supabase/functions/detect-location/index.ts

@@ -11,6 +11,40 @@ interface IPLocationResponse {
   measurementSystem: 'metric' | 'imperial';
 }
 
+// Simple in-memory rate limiter
+const rateLimitMap = new Map<string, { count: number; resetAt: number }>();
+const RATE_LIMIT_WINDOW = 60000; // 1 minute in milliseconds
+const MAX_REQUESTS = 10; // 10 requests per minute per IP
+
+function checkRateLimit(ip: string): { allowed: boolean; retryAfter?: number } {
+  const now = Date.now();
+  const existing = rateLimitMap.get(ip);
+
+  if (!existing || now > existing.resetAt) {
+    // Create new entry or reset expired entry
+    rateLimitMap.set(ip, { count: 1, resetAt: now + RATE_LIMIT_WINDOW });
+    return { allowed: true };
+  }
+
+  if (existing.count >= MAX_REQUESTS) {
+    const retryAfter = Math.ceil((existing.resetAt - now) / 1000);
+    return { allowed: false, retryAfter };
+  }
+
+  existing.count++;
+  return { allowed: true };
+}
+
+// Clean up old entries periodically to prevent memory leak
+setInterval(() => {
+  const now = Date.now();
+  for (const [ip, data] of rateLimitMap.entries()) {
+    if (now > data.resetAt) {
+      rateLimitMap.delete(ip);
+    }
+  }
+}, RATE_LIMIT_WINDOW);
+
 serve(async (req) => {
   // Handle CORS preflight requests
   if (req.method === 'OPTIONS') {
@@ -23,6 +57,26 @@ serve(async (req) => {
     const realIP = req.headers.get('x-real-ip');
     const clientIP = forwarded?.split(',')[0] || realIP || '8.8.8.8'; // fallback to Google DNS for testing
     
+    // Check rate limit
+    const rateLimit = checkRateLimit(clientIP);
+    if (!rateLimit.allowed) {
+      return new Response(
+        JSON.stringify({
+          error: 'Rate limit exceeded',
+          message: 'Too many requests. Please try again later.',
+          retryAfter: rateLimit.retryAfter
+        }),
+        {
+          status: 429,
+          headers: {
+            ...corsHeaders,
+            'Content-Type': 'application/json',
+            'Retry-After': String(rateLimit.retryAfter || 60)
+          }
+        }
+      );
+    }
+    
     console.log('Detecting location for IP:', clientIP);
 
     // Use configurable geolocation service with proper error handling

supabase/functions/upload-image/index.ts

@@ -30,7 +30,10 @@ serve(async (req) => {
       const authHeader = req.headers.get('Authorization')
       if (!authHeader) {
         return new Response(
-          JSON.stringify({ error: 'Authentication required for delete operations' }),
+          JSON.stringify({ 
+            error: 'Authentication required',
+            message: 'Authentication required for delete operations'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -49,7 +52,10 @@ serve(async (req) => {
       if (authError || !user) {
         console.error('Auth verification failed:', authError)
         return new Response(
-          JSON.stringify({ error: 'Invalid authentication' }),
+          JSON.stringify({ 
+            error: 'Invalid authentication',
+            message: 'Authentication token is invalid or expired'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -67,7 +73,10 @@ serve(async (req) => {
       if (profileError || !profile) {
         console.error('Failed to fetch user profile:', profileError)
         return new Response(
-          JSON.stringify({ error: 'User profile not found' }),
+          JSON.stringify({ 
+            error: 'User profile not found',
+            message: 'Unable to verify user profile'
+          }),
           { 
             status: 403, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -77,7 +86,10 @@ serve(async (req) => {
 
       if (profile.banned) {
         return new Response(
-          JSON.stringify({ error: 'Account suspended. Contact support for assistance.' }),
+          JSON.stringify({ 
+            error: 'Account suspended',
+            message: 'Account suspended. Contact support for assistance.'
+          }),
           { 
             status: 403, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -91,7 +103,10 @@ serve(async (req) => {
         requestBody = await req.json();
       } catch (error) {
         return new Response(
-          JSON.stringify({ error: 'Invalid JSON in request body' }),
+          JSON.stringify({ 
+            error: 'Invalid JSON',
+            message: 'Request body must be valid JSON'
+          }),
           { 
             status: 400, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -103,7 +118,10 @@ serve(async (req) => {
       
       if (!imageId || typeof imageId !== 'string' || imageId.trim() === '') {
         return new Response(
-          JSON.stringify({ error: 'imageId is required and must be a non-empty string' }),
+          JSON.stringify({ 
+            error: 'Invalid imageId',
+            message: 'imageId is required and must be a non-empty string'
+          }),
           { 
             status: 400, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -125,7 +143,10 @@ serve(async (req) => {
       } catch (fetchError) {
         console.error('Network error deleting image:', fetchError)
         return new Response(
-          JSON.stringify({ error: 'Network error: Unable to reach Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Network error',
+            message: 'Unable to reach Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -139,7 +160,10 @@ serve(async (req) => {
       } catch (parseError) {
         console.error('Failed to parse Cloudflare delete response:', parseError)
         return new Response(
-          JSON.stringify({ error: 'Invalid response from Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Invalid response',
+            message: 'Unable to parse response from Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -152,6 +176,7 @@ serve(async (req) => {
         return new Response(
           JSON.stringify({ 
             error: 'Failed to delete image',
+            message: deleteResult.errors?.[0]?.message || deleteResult.error || 'Unknown error occurred',
             details: deleteResult.errors || deleteResult.error 
           }),
           { 
@@ -174,7 +199,10 @@ serve(async (req) => {
       const authHeader = req.headers.get('Authorization')
       if (!authHeader) {
         return new Response(
-          JSON.stringify({ error: 'Authentication required for upload operations' }),
+          JSON.stringify({ 
+            error: 'Authentication required',
+            message: 'Authentication required for upload operations'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -193,7 +221,10 @@ serve(async (req) => {
       if (authError || !user) {
         console.error('Auth verification failed:', authError)
         return new Response(
-          JSON.stringify({ error: 'Invalid authentication' }),
+          JSON.stringify({ 
+            error: 'Invalid authentication',
+            message: 'Authentication token is invalid or expired'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -211,7 +242,10 @@ serve(async (req) => {
       if (profileError || !profile) {
         console.error('Failed to fetch user profile:', profileError)
         return new Response(
-          JSON.stringify({ error: 'User profile not found' }),
+          JSON.stringify({ 
+            error: 'User profile not found',
+            message: 'Unable to verify user profile'
+          }),
           { 
             status: 403, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -221,7 +255,10 @@ serve(async (req) => {
 
       if (profile.banned) {
         return new Response(
-          JSON.stringify({ error: 'Account suspended. Contact support for assistance.' }),
+          JSON.stringify({ 
+            error: 'Account suspended',
+            message: 'Account suspended. Contact support for assistance.'
+          }),
           { 
             status: 403, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -240,7 +277,10 @@ serve(async (req) => {
       // Validate request body structure
       if (requestBody && typeof requestBody !== 'object') {
         return new Response(
-          JSON.stringify({ error: 'Request body must be a valid JSON object' }),
+          JSON.stringify({ 
+            error: 'Invalid request body',
+            message: 'Request body must be a valid JSON object'
+          }),
           { 
             status: 400, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -274,7 +314,10 @@ serve(async (req) => {
       } catch (fetchError) {
         console.error('Network error getting upload URL:', fetchError)
         return new Response(
-          JSON.stringify({ error: 'Network error: Unable to reach Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Network error',
+            message: 'Unable to reach Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -288,7 +331,10 @@ serve(async (req) => {
       } catch (parseError) {
         console.error('Failed to parse Cloudflare upload response:', parseError)
         return new Response(
-          JSON.stringify({ error: 'Invalid response from Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Invalid response',
+            message: 'Unable to parse response from Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -301,6 +347,7 @@ serve(async (req) => {
         return new Response(
           JSON.stringify({ 
             error: 'Failed to get upload URL',
+            message: directUploadResult.errors?.[0]?.message || directUploadResult.error || 'Unable to create upload URL',
             details: directUploadResult.errors || directUploadResult.error 
           }),
           { 
@@ -328,7 +375,10 @@ serve(async (req) => {
       const authHeader = req.headers.get('Authorization')
       if (!authHeader) {
         return new Response(
-          JSON.stringify({ error: 'Authentication required for image status operations' }),
+          JSON.stringify({ 
+            error: 'Authentication required',
+            message: 'Authentication required for image status operations'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -347,7 +397,10 @@ serve(async (req) => {
       if (authError || !user) {
         console.error('Auth verification failed:', authError)
         return new Response(
-          JSON.stringify({ error: 'Invalid authentication' }),
+          JSON.stringify({ 
+            error: 'Invalid authentication',
+            message: 'Authentication token is invalid or expired'
+          }),
           { 
             status: 401, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -361,7 +414,10 @@ serve(async (req) => {
       
       if (!imageId || imageId.trim() === '') {
         return new Response(
-          JSON.stringify({ error: 'id query parameter is required and must be non-empty' }),
+          JSON.stringify({ 
+            error: 'Missing id parameter',
+            message: 'id query parameter is required and must be non-empty'
+          }),
           { 
             status: 400, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -382,7 +438,10 @@ serve(async (req) => {
       } catch (fetchError) {
         console.error('Network error fetching image status:', fetchError)
         return new Response(
-          JSON.stringify({ error: 'Network error: Unable to reach Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Network error',
+            message: 'Unable to reach Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -396,7 +455,10 @@ serve(async (req) => {
       } catch (parseError) {
         console.error('Failed to parse Cloudflare image status response:', parseError)
         return new Response(
-          JSON.stringify({ error: 'Invalid response from Cloudflare Images API' }),
+          JSON.stringify({ 
+            error: 'Invalid response',
+            message: 'Unable to parse response from Cloudflare Images API'
+          }),
           { 
             status: 500, 
             headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -409,6 +471,7 @@ serve(async (req) => {
         return new Response(
           JSON.stringify({ 
             error: 'Failed to get image status',
+            message: imageResult.errors?.[0]?.message || imageResult.error || 'Unable to retrieve image information',
             details: imageResult.errors || imageResult.error 
           }),
           { 
@@ -447,7 +510,10 @@ serve(async (req) => {
     }
 
     return new Response(
-      JSON.stringify({ error: 'Method not allowed' }),
+      JSON.stringify({ 
+        error: 'Method not allowed',
+        message: 'HTTP method not supported for this endpoint'
+      }),
       { 
         status: 405, 
         headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
@@ -459,7 +525,7 @@ serve(async (req) => {
     return new Response(
       JSON.stringify({ 
         error: 'Internal server error',
-        message: error instanceof Error ? error.message : 'Unknown error'
+        message: error instanceof Error ? error.message : 'An unexpected error occurred'
       }),
       { 
         status: 500,