| # Cobalt NetLog |
| |
| Chromium has a very useful network diagnostic tool called the NetLog and Cobalt |
| is hooked up to use it. It's the main tool to track network traffic and debug |
| network code. |
| |
| ### Activate the NetLog |
| |
| The following command line switch will activate the NetLog and store net log |
| record to the specified location. |
| `./cobalt --net_log=/PATH/TO/YOUR_NETLOG_NAME.json` |
| The output json file will be stored at the file location you choose. |
| |
| |
| ### Read the NetLog records |
| |
| The produced json file is not human-friendly, use the |
| [NetLog Viewer](https://netlog-viewer.appspot.com/#import) |
| |
| Cobalt's net_log can not enable some features in the web viewer, but all the |
| network traffic is recorded in the event tab. |
| |
| |
| ### Add NetLog entries |
| |
| To Add NetLog entry, get the NetLog instance owned by NetworkModule to where you |
| want to add entries and start/end your entry according to the NetLog interface. |
| |
| A NetLog object is created at each NetworkModule initialization and is passed |
| into Chromium net through URLRequestContext. |
