# issue-4250

Getting HTTP headers of the url page response directly in a Nightwatch test nightwatchjs#4250

github- Harshit-7373

lib/api/expect/assertions/headerTest.js

@@ -0,0 +1,28 @@
+module.exports = {
+  'Test if headers are captured correctly': function (browser) {
+    browser.url('https://example.com', {captureHeaders: true}, function (result) {
+      const headers = browser.getHeaders();
+
+      // Ensure headers object is available
+      if (!headers) {
+        console.error('Headers could not be retrieved!');
+        browser.assert.fail('Headers object is undefined or null');
+
+        return;
+      }
+
+      // Log headers for debugging purposes
+      console.log('Captured Headers:', headers); // eslint-disable-line no-console
+
+      // Assertions to validate specific headers
+      browser.assert.ok(headers['content-type'], 'Content-Type header is present');
+      browser.assert.equal(
+        headers['content-type'],
+        'text/html; charset=UTF-8',
+        'Content-Type header matches expected value'
+      );
+    });
+
+    browser.end();
+  }
+};

lib/api/protocol/url.js

@@ -2,31 +2,26 @@ const ProtocolAction = require('./_base-action.js');
 const ora = require('ora');
 
 /**
- * Retrieve the URL of the current page or navigate to a new URL.
+ * Retrieve the URL of the current page or navigate to a new URL, with an option to capture HTTP headers.
  *
  * @example
  * module.exports = {
  *  'demo Test' : function(browser) {
- *     browser.url(function(result) {
- *       // return the current url
- *       console.log(result);
- *     });
- *
- *     // navigate to new url:
- *     browser.url('{URL}');
- *
- *     // navigate to new url:
- *     browser.url('{URL}', function(result) {
- *       console.log(result);
+ *     browser.url('{URL}', {captureHeaders: true}, function(result) {
+ *       // access headers after page loads
+ *       const headers = browser.getHeaders();
+ *       console.log(headers);
  *     });
  *   }
  * }
  *
  * @method url
  * @link /#navigate-to
- * @syntax .url([url], [callback])
+ * @syntax .url([url], [options], [callback])
  * @syntax .url(callback)
  * @param {string|function} [url] If missing, it will return the URL of the current page as an argument to the supplied callback.
+ * @param {Object} [options] Options to configure the behavior.
+ * @param {boolean} [options.captureHeaders] If `true`, captures HTTP response headers for the page.
  * @param {Function} [callback]
  * @api protocol.navigation
  */
@@ -35,7 +30,9 @@ module.exports = class Action extends ProtocolAction {
     return true;
   }
 
-  command(url, callback = function(r) {return r}) {
+  command(url, options = {}, callback = function(r) { return r }) {
+    const {captureHeaders} = options;
+
     if (typeof url == 'string') {
       const startTime = new Date();
       let spinner;
@@ -47,6 +44,10 @@ module.exports = class Action extends ProtocolAction {
         }).start();
       }
 
+      if (captureHeaders) {
+        this.captureHeaders(url);  // Capture headers if the flag is set
+      }
+
       return this.transportActions.navigateTo(url).then(result => {
         if (spinner) {
           const ms = new Date() - startTime;
@@ -65,4 +66,27 @@ module.exports = class Action extends ProtocolAction {
       return callback.call(this.api, result);
     });
   }
+
+  // New method to capture headers from the network request
+  captureHeaders(url) {
+    const client = this.api.client;
+
+    client.send('Network.enable'); // Enable the network domain
+    let responseHeaders = null;
+
+    // Listen for network response events to capture headers
+    client.on('Network.responseReceived', (params) => {
+      if (params.response.url === url) {
+        responseHeaders = params.response.headers;
+      }
+    });
+
+    // Store headers in the api object
+    this.api.capturedHeaders = responseHeaders;
+  }
+
+  // New method to retrieve captured headers
+  getHeaders() {
+    return this.api.capturedHeaders;
+  }
 };