backend: Limitation d'appel à l'api openweathermap.org pour la fonction weatherRequest

backend/assets/functions/main/weatherRequest.js

@@ -1,8 +1,24 @@
 const axios               = require('axios');
+const Queue               = require('smart-request-balancer');
 const sendResponse        = require('../../utils/sendResponse');
 const { requiredFields }  = require('../../config/errors');
 const { WEATHER_API_KEY } = require('../../config/config');
 
+const queue = new Queue({
+    /*
+        rate: number of requests
+            per
+        limit: number of seconds
+    */
+    rules: {
+        weatherRequest: { 
+            rate: 50,            
+            limit: 60,           
+            priority: 1
+        },
+    }
+});
+
 /* OUTPUTS */
 exports.weatherRequestOutput = async (res, argsObject) => {
     let { cityName } = argsObject;
@@ -12,8 +28,10 @@ exports.weatherRequestOutput = async (res, argsObject) => {
         return sendResponse(res, requiredFields);
     }
 
-    // Récupère les données météo grâce à l'API : openweathermap.org.
-    axios.get(`https://api.openweathermap.org/data/2.5/weather?q=${cityName}&lang=fr&units=metric&appid=${WEATHER_API_KEY}`)
-        .then((response) => sendResponse(res, { result: response.data }, true))
-        .catch(() => sendResponse(res, { result: "La ville n'existe pas (dans l'API de openweathermap.org)." }));
+    // Récupère les données météo grâce à l'API : openweathermap.org. (→ avec limite de 50 requêtes par minute)
+    queue.request(() => {
+        axios.get(`https://api.openweathermap.org/data/2.5/weather?q=${cityName}&lang=fr&units=metric&appid=${WEATHER_API_KEY}`)
+            .then((response) => sendResponse(res, { result: response.data }, true))
+            .catch(() => sendResponse(res, { result: "La ville n'existe pas (dans l'API de openweathermap.org).", httpStatus: 404 }));
+    }, 'everyone', 'weatherRequest');
 }

backend/assets/utils/sendResponse.js

@@ -4,7 +4,7 @@
  * @param {Object} object { httpStatus, customProperties{Object}, result }
  * @param {Boolean} isSuccess (false par defaut)
  */
-function sendResponse (res, object, isSuccess = false) {
+function sendResponse(res, object, isSuccess = false) {
     res.status(object.httpStatus || 200).json({ isSuccess, ...object.customProperties, result: object.result }); 
 }
 

backend/package-lock.json

@@ -1219,6 +1219,30 @@
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
       "dev": true
     },
+    "smart-request-balancer": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/smart-request-balancer/-/smart-request-balancer-2.1.1.tgz",
+      "integrity": "sha512-4AnMhV4amviBUGKeACOricuj4dhihf2P9Z/s3+cvZ3kjFxUwEV74JL9JTdK3/7Im84cC3J9ANeg+sUjSv0buxQ==",
+      "requires": {
+        "debug": "^4.1.1",
+        "uuid": "^3.3.2"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        }
+      }
+    },
     "statuses": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
@@ -1372,6 +1396,11 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
+    "uuid": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",

backend/package.json

@@ -13,7 +13,8 @@
     "axios": "^0.19.2",
     "cors": "^2.8.5",
     "express": "^4.17.1",
-    "helmet": "^3.21.3"
+    "helmet": "^3.21.3",
+    "smart-request-balancer": "^2.1.1"
   },
   "devDependencies": {
     "dotenv": "^8.2.0",