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Network logs

Network Logs capture performance data such as network traffic, latency, HTTP requests and responses in the HAR (HTTP Archive) format. You can leverage network logs to get a clear picture of all the network requests (e.g. REST API calls) originating from your app, and the time taken for each of these requests. It can help you identify performance bottenecks or debug failed REST API responses. You can visualize HAR files using the HAR Viewer.

Enable Network Logs

When you run a test without the Network log settings, the Network Logs tab on the dashboard shows the following message: Network Logs Disabled

Note: The response data is not captured for Android devices.

Use the following example code snippet to set the browserstack.networkLogs capability to true:

Example :

DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities.setCapability("browserstack.networkLogs", "true");
var capabilities = {
	'browserstack.networkLogs': 'true',
}
DesiredCapabilities capability = new DesiredCapabilities();
capability.SetCapability("browserstack.networkLogs", "true");
$capabilities = new DesiredCapabilities();
$capabilities->setCapability("browserstack.networkLogs", "true");
desired_cap = {
	'browserstack.networkLogs': 'true'
}
desired_caps = {
    'browserstack.networkLogs': 'true'
}

The following table provides information about the capability.

Capability Description Value
browserstack.networkLogs Capture network logs for your test true, false
Default: false

After you set the browserstack.networkLogs capability to true, the Network Logs tab on the dashboard shows the following result: Network Logs Enabled

Note: Free trial users do not have access to the network logs feature for app testing. To subscribe to a paid plan, visit the pricing page.

Download network logs

The network logs can be viewed from the test sessions details page on the App Automate Dashboard. You can download network logs using the Raw Network Logs link.

View network logs in App Automate dashboard

Example network logs:

Sample Network Logs output

Import network logs using REST API

You can import the network logs from your test session using REST API:

curl -u "YOUR_USERNAME:YOUR_ACCESS_KEY" -X GET "https://api-cloud.browserstack.com/app-automate/builds/<build-id>/sessions/<session-id>/networklogs"

Handling certificate pinning issues

App developers may use certificate pinning techniques to prevent man-in-the-middle attacks and thus enhance the app’s security. Using certificate pinning, the app developer can associate (or “pin”) a remote host or service with its certificate / public keys at the time of development. When the app makes a network request to a remote host, it compares the pinned certificate with the remote server’s certificate to verify its identity.

However, on BrowserStack, if you have enabled network logs, your tests could fail if your app uses certificate pinning. This is because BrowserStack uses a MITM proxy to capture the network logs, causing network requests between the app and pinned hosts to fail.

BrowserStack provides you additional capabilities to fix certificate pinning errors. Using these capabilities, you can bypass BrowserStack’s MITM proxy while making requests to certificate-pinned remote hosts.

browserstack.networkLogsExcludeHosts

Capability Description Value
browserstack.networkLogsExcludeHosts Use this capability to specify a list of certificate pinned hosts that should bypass BrowserStack MITM proxy while capturing network logs. By doing so, your tests can execute successfully while still capturing network logs for all other remaining hosts. List of certificate pinned hosts (Array) or regex value (String)

For example, this will exclude capturing of logs for any requests made to api.example.com and google.com:

DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities.setCapability("browserstack.networkLogsExcludeHosts", new String[]{"api.example.com", "google.com"});
var capabilities = {
	'browserstack.networkLogsExcludeHosts': ['api.example.com', 'google.com'],
}
DesiredCapabilities capability = new DesiredCapabilities();
capability.SetCapability("browserstack.networkLogsExcludeHosts", new[] {'api.example.com', 'google.com'});
$capabilities = new DesiredCapabilities();
$capabilities->setCapability("browserstack.networkLogsExcludeHosts", ["api.example.com", "google.com"]);
desired_cap = {
	'browserstack.networkLogsExcludeHosts': ['api.example.com', 'google.com']
}
desired_caps = {
    'browserstack.networkLogsExcludeHosts': ['api.example.com', 'google.com']
}

Instead of using an array, you can also pass a regex value as a string to dynamically match a list of hosts. For example, this will exclude capturing of logs for any requests made to example.com and its subdomains.

DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities.setCapability("browserstack.networkLogsExcludeHosts", "^(.+\.)?example.com");
var capabilities = {
	'browserstack.networkLogsExcludeHosts': '^(.+\.)?example.com',
}
DesiredCapabilities capability = new DesiredCapabilities();
capability.SetCapability("browserstack.networkLogsExcludeHosts", "^(.+\.)?example.com");
$capabilities = new DesiredCapabilities();
$capabilities->setCapability("browserstack.networkLogsExcludeHosts", "^(.+\.)?example.com");
desired_cap = {
	'browserstack.networkLogsExcludeHosts': '^(.+\.)?example.com'
}
desired_caps = {
    'browserstack.networkLogsExcludeHosts': '^(.+\.)?example.com'
}

browserstack.networkLogsIncludeHosts

Capability Description Value
browserstack.networkLogsIncludeHosts Use this capability if you wish to capture network logs only for specific hosts. Traffic for all other remaining hosts will bypass BrowserStack MITM proxy and won’t be captured in network logs. List of hosts (Array) or regex value (String)

For example, this will capture logs only for network requests made to api.example.com and google.com

DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities.setCapability("browserstack.networkLogsIncludeHosts", new String[]{"api.example.com", "google.com"});
var capabilities = {
	'browserstack.networkLogsIncludeHosts': ['api.example.com', 'google.com'],
}
DesiredCapabilities capability = new DesiredCapabilities();
capability.SetCapability("browserstack.networkLogsIncludeHosts", new[] {'api.example.com', 'google.com'});
$capabilities = new DesiredCapabilities();
$capabilities->setCapability("browserstack.networkLogsIncludeHosts", ["api.example.com", "google.com"]);
desired_cap = {
	'browserstack.networkLogsIncludeHosts': ['api.example.com', 'google.com']
}
desired_caps = {
    'browserstack.networkLogsIncludeHosts': ['api.example.com', 'google.com']
}

Instead of using an array, you can also pass a regex value as a string to dynamically match a list of hosts. For example, this will capture logs for any network requests made to example.com and its subdomains.

DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities.setCapability("browserstack.networkLogsIncludeHosts", "^(.+\.)?example.com");
var capabilities = {
	'browserstack.networkLogsIncludeHosts': '^(.+\.)?example.com',
}
DesiredCapabilities capability = new DesiredCapabilities();
capability.SetCapability("browserstack.networkLogsIncludeHosts", "^(.+\.)?example.com");
$capabilities = new DesiredCapabilities();
$capabilities->setCapability("browserstack.networkLogsIncludeHosts", "^(.+\.)?example.com");
desired_cap = {
	'browserstack.networkLogsIncludeHosts': '^(.+\.)?example.com'
}
desired_caps = {
    'browserstack.networkLogsIncludeHosts': '^(.+\.)?example.com'
}

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