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Dev Proxy allows you to simulate behaviors for APIs. To do that, you need to know which URLs your app is calling and configure Dev Proxy to intercept them.
To find out which URLs your app is calling, use the --discover option. This option loads a preset that uses the UrlDiscoveryPlugin and PlainTextReporter to create a list of URLs that the proxy intercepts.
The discovery preset is configured to intercept requests to any URL and pass them through to the original API. It uses the UrlDiscoveryPlugin, to generate a list of unique URLs, and the PlainTextReporter to save the list to a text file.
Tip
Before you start Dev Proxy with the --discover option, find out from which process you want to capture requests. You can specify the process by its ID or name. Without this option, Dev Proxy intercepts all requests made by your machine, which makes it hard to find the URLs you're interested in. For more information, see Intercept requests from specific processes.
For example, to discover URLs that a client-side application uses, running in Microsoft Edge on Windows, run the following command:
devproxy --discover --watch-process-names msedge
After you start Dev Proxy, interact with your application so that it issues requests to the APIs you want to simulate. Dev Proxy intercepts these requests. When you finish, stop Dev Proxy by pressing Ctrl+C. The urls-to-watch preset saves the list of URLs to the UrlDiscoveryPlugin_PlainTextReporter.txt file in the current directory.
Next steps
Learn more about the UrlDiscoveryPlugin.
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The source for this content can be found on GitHub, where you can also create and review issues and pull requests. For more information, see our contributor guide.
