chrome.devtools.network
- Description
Use the
chrome.devtools.networkAPI to retrieve the information about network requests displayed by the Developer Tools in the Network panel. - Manifest Keys
See DevTools APIs summary for general introduction to using Developer Tools APIs.
Overview
Network requests information is represented in the HTTP Archive format (HAR). The description of HAR is outside of scope of this document, please refer to HAR v1.2 Specification.
In terms of HAR, the chrome.devtools.network.getHAR() method returns entire HAR log, while chrome.devtools.network.onRequestFinished event provides HAR entry as an argument to the event callback.
Note that request content is not provided as part of HAR for efficiency reasons. You may call request's getContent() method to retrieve content.
If the Developer Tools window is opened after the page is loaded, some requests may be missing in the array of entries returned by getHAR(). Reload the page to get all requests. In general, the list of requests returned by getHAR() should match that displayed in the Network panel.
Examples
The following code logs URLs of all images larger than 40KB as they are loaded:
chrome.devtools.network.onRequestFinished.addListener(
function(request) {
if (request.response.bodySize > 40*1024) {
chrome.devtools.inspectedWindow.eval(
'console.log("Large image: " + unescape("' +
escape(request.request.url) + '"))');
}
}
);To try this API, install the devtools API examples from the chrome-extension-samples repository.
Summary
- Types
- Methods
- Events
Types
Request
Represents a network request for a document resource (script, image and so on). See HAR Specification for reference.
Properties
- getContent
void
Returns content of the response body.
The
getContentfunction looks like:(callback: function) => {...}- callback
function
The
callbackparameter looks like:(content: string, encoding: string) => void- content
string
Content of the response body (potentially encoded).
- encoding
string
Empty if content is not encoded, encoding name otherwise. Currently, only base64 is supported.
Methods
getHAR
chrome.devtools.network.getHAR(
callback:
function,
)
Returns HAR log that contains all known network requests.
Parameters
- callback
function
The
callbackparameter looks like:(harLog: object) => void- harLog
object
A HAR log. See HAR specification for details.
Events
onNavigated
chrome.devtools.network.onNavigated.addListener(
callback:
function,
)
Fired when the inspected window navigates to a new page.
Parameters
function
The
callbackparameter looks like:(url: string) => voidstring
onRequestFinished
chrome.devtools.network.onRequestFinished.addListener(
callback:
function,
)
Fired when a network request is finished and all request data are available.