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# Debugging
## XDS server architecture
The server part is written in *Go* and web app (basic HTML) in *Angular4*.
```bash
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+-- bin/ # where xds-server binary file will be built
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+-- conf.d/ # Linux configuration and startup files (systemd user service)
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+-- glide.yaml # Go package dependency file
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+-- lib/ # sources of server part (Go)
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+-- LICENSE # XDS server license
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+-- main.go # main entry point of of Web server (Go)
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+-- Makefile # makefile including
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+-- README.md # readme
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+-- scripts/ # hold various scripts used for installation or startup
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+-- test/ # XDS test suite
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+-- tools/ # temporary directory to hold development tools (like glide)
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+-- vendor/ # temporary directory to hold Go dependencies packages
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+-- webapp/ # source client basic web application
```
## Debug server part (Go code)
Install first [Visual Studio Code](https://code.visualstudio.com/) and
[Go plugin](https://marketplace.visualstudio.com/items?itemName=lukehoban.Go)
(`ext install lukehoban.Go`)
Visual Studio Code launcher settings can be found into `.vscode/launch.json`.
Please follow instructions of xds-agent [debugging chapter](../2_xds-agent/4_debug.html#debug-xds-agent-go-code),
knowing that you execute these same instructions in `xds-server` repo, in other words
by replacing *xds-agent* references by *xds-server*.
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