Merge pull request #725 from magieno/2024-09-add-response-time-to-htt…

…p-client

- Calculates the response time

packages/http/src/interfaces/http-response.interface.ts

@@ -25,4 +25,14 @@ export interface HttpResponseInterface {
      * The request that was sent for getting this response.
      */
     request: HttpRequestInterface;
+
+    /**
+     * The time it took to get the response (in ms).
+     */
+    responseTime?: number;
+
+    /**
+     * The time it took to get the first byte of the response (in ms).
+     */
+    timeToFirstByte?: number;
 }

packages/http/src/wrappers/http.wrapper.ts

@@ -24,6 +24,8 @@ export class HttpWrapper implements HttpWrapperInterface {
     executeRequest(request: HttpRequestInterface): Promise<HttpResponseInterface> {
         return new Promise((resolve, reject) => {
             // Define the options required by the http and https modules.
+            let now: number = -1;
+
             const url = new URL(request.url);
             const options: RequestOptions = {
                 host: url.hostname,
@@ -48,20 +50,25 @@ export class HttpWrapper implements HttpWrapperInterface {
                 let body = '';
 
                 res.on('data', chunk => {
+                    response.timeToFirstByte = performance.now() - now;
                     body = body + "" + chunk;
                 });
 
                 res.on('error', error => {
+                    response.responseTime = performance.now() - now;
                     return reject(error);
                 })
 
                 res.on('end', async () => {
                     response.body = body;
+                    response.responseTime = performance.now() - now;
 
                     return resolve(response);
                 });
             }
 
+            now = performance.now();
+
             // Make the http or https call depending on the url.
             if (url.protocol === "http://" || url.protocol === "http:" || url.protocol === "http") {
                 const req = httpRequest(options, callback);