36 lines
690 B
Go
36 lines
690 B
Go
package main
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import (
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"io/ioutil"
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"net"
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"net/http"
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"os"
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"strconv"
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)
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func main() {
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// create a new handler
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handler := http.HandlerFunc(__HANDLER_FUNC_NAME)
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// https://stackoverflow.com/a/43425461/376773
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listener, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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panic(err)
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}
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port := listener.Addr().(*net.TCPAddr).Port
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portBytes := []byte(strconv.Itoa(port))
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file := os.NewFile(3, "pipe")
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_, err2 := file.Write(portBytes)
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if err2 != nil {
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portFile := os.Getenv("VERCEL_DEV_PORT_FILE")
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os.Unsetenv("VERCEL_DEV_PORT_FILE")
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err3 := ioutil.WriteFile(portFile, portBytes, 0644)
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if err3 != nil {
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panic(err3)
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}
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}
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panic(http.Serve(listener, handler))
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}
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