updateweb

backend/middleware/compression.js

@@ -0,0 +1,35 @@
+/**
+ * Response Compression Middleware
+ * Compresses API responses to reduce payload size
+ */
+const compression = require("compression");
+
+const compressionMiddleware = compression({
+  // Only compress responses larger than 1kb
+  threshold: 1024,
+  // Compression level (0-9, higher = better compression but slower)
+  level: 6,
+  // Filter function - don't compress already compressed formats
+  filter: (req, res) => {
+    if (req.headers["x-no-compression"]) {
+      return false;
+    }
+    // Check content-type
+    const contentType = res.getHeader("Content-Type");
+    if (!contentType) return compression.filter(req, res);
+
+    // Don't compress images, videos, or already compressed formats
+    if (
+      contentType.includes("image/") ||
+      contentType.includes("video/") ||
+      contentType.includes("application/zip") ||
+      contentType.includes("application/pdf")
+    ) {
+      return false;
+    }
+
+    return compression.filter(req, res);
+  },
+});
+
+module.exports = compressionMiddleware;