Rename server => modules

modules/middleware/checkBlacklist.js

@@ -0,0 +1,26 @@
+const BlacklistAPI = require("../BlacklistAPI");
+
+function checkBlacklist(req, res, next) {
+  BlacklistAPI.includesPackage(req.packageName).then(
+    blacklisted => {
+      // Disallow packages that have been blacklisted.
+      if (blacklisted) {
+        res
+          .status(403)
+          .type("text")
+          .send(`Package "${req.packageName}" is blacklisted`);
+      } else {
+        next();
+      }
+    },
+    error => {
+      console.error(error);
+
+      res.status(500).send({
+        error: "Unable to fetch the blacklist"
+      });
+    }
+  );
+}
+
+module.exports = checkBlacklist;