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Proxy Agents is a Node.js monorepo containing HTTP agent implementations for routing requests through proxy servers. Its high-level proxy-agent package automatically selects the correct agent from standard environment variables such as HTTP_PROXY, HTTPS_PROXY, and NO_PROXY. Lower-level packages provide dedicated support for HTTP, HTTPS, SOCKS, and PAC-based proxy configurations.
Locally test and debug chat bots built with the Bot Framework SDK
...Before connecting your bot to the Bot Framework Emulator, you need to run your bot locally. You can use Visual Studio or Visual Studio Code to run your bot, or use the command line. When you are developing behind a corporate proxy, the Emulator will use the configured environment variables HTTP_PROXY and HTTPS_PROXY, which specify the proxy URL route for HTTP and HTTPs requests.
...From there you are control of making the actual REST call. This means you can reuse your existing HTTP client, use existing authentication schemes and override any part of the REST call. You can override the REST host, proxy incoming request headers along to your REST backend, add caching etc.