> For the complete documentation index, see [llms.txt](https://openai.gitbook.io/code-cheatsheets/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://openai.gitbook.io/code-cheatsheets/all/go/server.md).

# server

```go
import (
    "fmt"
    "net/http"
)
```

## Serving

Have a struct that has a func, ServeHTTP will be called to service requests

```go
type Hello struct {}

func (h Hello) ServeHTTP(w http.ResponseWriter, r *http.Request) { 
    fmt.Fprint(w, "<h1> Hello from Go </h1>")//print to writer object
}
```

### Usage

```go
func main() {
    var h Hello
    err := http.ListenAndServe("localhost:4000", h)
    checkError(err)
}
```