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@@ -15,9 +15,11 @@
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package main
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import (
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+ "bufio"
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"encoding/json"
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"flag"
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"fmt"
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+ "io"
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"log"
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"net"
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)
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@@ -31,21 +33,42 @@ type Message struct {
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func main() {
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flag.Parse()
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- // TODO: Create a net.Listener listening from the address in the "listen" flag.
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+ // Create a net.Listener listening from the address in the "listen" flag.
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+ l, err := net.Listen("tcp4", *listenAddr)
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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for {
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- // TODO: Accept a new connection from the listener.
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+ // Accept a new connection from the listener.
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+ c, err := l.Accept()
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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+
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go serve(c)
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}
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}
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func serve(c net.Conn) {
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- // TODO: Use defer to Close the connection when this function returns.
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+ // Use defer to Close the connection when this function returns.
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+ defer c.Close()
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- // TODO: Create a new json.Decoder reading from the connection.
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+ // Create a new json.Decoder reading from the connection.
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+ d := json.NewDecoder(bufio.NewReader(c)) // NewDecoder(c) would loop on EOF
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for {
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- // TODO: Create an empty message.
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- // TODO: Decode a new message into the variable you just created.
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- // TODO: Print the message to the standard output.
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+ // Create an empty message.
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+ m := Message{}
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+ // Decode a new message into the variable you just created.
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+ err := d.Decode(&m)
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+ if err == io.EOF {
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+ break
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+ }
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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+ // Print the message to the standard output.
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+ fmt.Println(m)
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}
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+ log.Println("Closing connection on EOF.")
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}
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