working but i think proxy is useless protection for row limiter...

.gitignore

@@ -8,3 +8,6 @@
 
 # IDE files
 /.idea
+
+# proxy limiter
+proxy_limiter/node_modules

proxy_limiter/package-lock.json

+{
+  "name": "tata",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "tata",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
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+        "axios": "^1.6.8",
+        "fastify": "^4.26.2",
+        "graphql": "^16.8.1"
+      }
+    },
+    "node_modules/@fastify/ajv-compiler": {
+      "version": "3.5.0",
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+      "dependencies": {
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+        "ajv-formats": "^2.1.1",
+        "fast-uri": "^2.0.0"
+      }
+    },
+    "node_modules/@fastify/error": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/@fastify/error/-/error-3.4.1.tgz",
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+    },
+    "node_modules/@fastify/fast-json-stringify-compiler": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/@fastify/fast-json-stringify-compiler/-/fast-json-stringify-compiler-4.3.0.tgz",
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+      "dependencies": {
+        "fast-json-stringify": "^5.7.0"
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/@fastify/merge-json-schemas/-/merge-json-schemas-0.1.1.tgz",
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+      "dependencies": {
+        "fast-deep-equal": "^3.1.3"
+      }
+    },
+    "node_modules/@fastify/rate-limit": {
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/@fastify/rate-limit/-/rate-limit-9.1.0.tgz",
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+      "dependencies": {
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+        "fastify-plugin": "^4.0.0",
+        "toad-cache": "^3.3.1"
+      }
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+      "engines": {
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+      }
+    },
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+      "dependencies": {
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+      },
+      "engines": {
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+      }
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+    },
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+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
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+      }
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+      "peerDependenciesMeta": {
+        "ajv": {
+          "optional": true
+        }
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+    },
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+    },
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+      "resolved": "https://registry.npmjs.org/atomic-sleep/-/atomic-sleep-1.0.0.tgz",
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+      "engines": {
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+      }
+    },
+    "node_modules/avvio": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/avvio/-/avvio-8.3.0.tgz",
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+      "dependencies": {
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+        "archy": "^1.0.0",
+        "debug": "^4.0.0",
+        "fastq": "^1.17.1"
+      }
+    },
+    "node_modules/axios": {
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+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.6.8.tgz",
+      "integrity": "sha512-v/ZHtJDU39mDpyBoFVkETcd/uNdxrWRrg3bKpOKzXFA6Bvqopts6ALSMU3y6ijYxbw2B+wPrIv46egTzJXCLGQ==",
+      "dependencies": {
+        "follow-redirects": "^1.15.6",
+        "form-data": "^4.0.0",
+        "proxy-from-env": "^1.1.0"
+      }
+    },
+    "node_modules/base64-js": {
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+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
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+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
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+      "dependencies": {
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+    }
+  }
+}

proxy_limiter/package.json

+{
+  "name": "tata",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "dependencies": {
+    "@fastify/rate-limit": "^9.1.0",
+    "axios": "^1.6.8",
+    "fastify": "^4.26.2",
+    "graphql": "^16.8.1"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}

proxy_limiter/server.js

+const fastify = require("fastify")();
+const axios = require("axios");
+const { parse, visit, Kind } = require("graphql");
+const rateLimit = require("@fastify/rate-limit");
+
+const HASURA_ENDPOINT = "http://localhost:8080";
+const MAX_DEPTH = 5; // Set the maximum allowed depth
+const MAX_ROWS = 5; // Set the maximum allowed rows per response
+
+fastify.register(rateLimit, {
+  max: 100, // Maximum number of requests per time window
+  timeWindow: "1 minute", // Time window for rate limiting
+});
+
+// Function to calculate the depth of a GraphQL query
+function getDepth(ast) {
+  let depth = 0;
+
+  visit(ast, {
+    [Kind.SELECTION_SET](node) {
+      depth++;
+    },
+  });
+
+  return depth;
+}
+
+// Function to check if a query is an introspection query
+function isIntrospectionQuery(ast) {
+  let isIntrospection = false;
+
+  visit(ast, {
+    [Kind.FIELD](node) {
+      if (node.name.value === "__schema" || node.name.value === "__type") {
+        isIntrospection = true;
+      }
+    },
+  });
+
+  return isIntrospection;
+}
+
+// Function to count the number of rows in a response
+function countRows(response) {
+  let count = 0;
+
+  function traverseObject(obj) {
+    for (const key in obj) {
+      if (Array.isArray(obj[key])) {
+        count += obj[key].length;
+        obj[key].forEach(traverseObject);
+      } else if (typeof obj[key] === "object") {
+        traverseObject(obj[key]);
+      }
+    }
+  }
+
+  traverseObject(response);
+  return count;
+}
+
+// Middleware function for depth, row count, and rate limiting checks
+async function graphqlMiddleware(request, reply) {
+  try {
+    const query = request.body.query;
+    const parsedQuery = parse(query);
+
+    // Check if it's an introspection query
+    if (isIntrospectionQuery(parsedQuery)) {
+      // Forward the introspection query to Hasura and return the response
+      const response = await axios.post(
+        HASURA_ENDPOINT + request.url,
+        request.body,
+        {
+          headers: request.headers,
+        }
+      );
+      reply.status(response.status).send(response.data);
+      return;
+    }
+
+    // Check the depth of the GraphQL query
+    const depth = getDepth(parsedQuery);
+    if (depth > MAX_DEPTH) {
+      reply.status(400).send({
+        errors: [
+          {
+            message: `The query depth (${depth}) exceeds the allowed limit (${MAX_DEPTH})`,
+          },
+        ],
+      });
+      return;
+    }
+
+    // Forward the request to Hasura and get the response
+    const response = await axios.post(
+      HASURA_ENDPOINT + request.url,
+      request.body,
+      {
+        headers: request.headers,
+      }
+    );
+
+    // Check the number of rows in the response
+    const rowCount = countRows(response.data);
+    if (rowCount > MAX_ROWS) {
+      reply.status(400).send({
+        errors: [
+          {
+            message: `The response contains too many rows (${rowCount}). The maximum allowed is ${MAX_ROWS}.`,
+          },
+        ],
+      });
+      return;
+    }
+
+    // Forward Hasura's response to the client
+    reply.status(response.status).send(response.data);
+  } catch (error) {
+    // Handle request errors
+    reply
+      .status(error.response ? error.response.status : 500)
+      .send(error.response ? error.response.data : { message: error.message });
+  }
+}
+
+// Route for /v1/graphql
+fastify.post("/v1/graphql", graphqlMiddleware);
+
+// Route for /v1beta1/relay
+fastify.post("/v1beta1/relay", graphqlMiddleware);
+
+const start = async () => {
+  try {
+    await fastify.listen({ port: 3000, host: "0.0.0.0" });
+    console.log(`Server running on port ${fastify.server.address().port}`);
+  } catch (err) {
+    fastify.log.error(err);
+    process.exit(1);
+  }
+};
+start();