stephen mcquay
69d2c50dc5
if you read gob docs it states the following: " If a field has the zero value for its type, it is omitted from the transmission." That's powerful savings. I didn't know. Now it works as one would expect.
68 lines
1.1 KiB
Go
68 lines
1.1 KiB
Go
package main
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import (
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"bufio"
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"encoding/gob"
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"fmt"
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"net"
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"os"
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"strconv"
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"strings"
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"mcquay.me/robo"
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)
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const usage = "rsend <hostname>"
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func main() {
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if len(os.Args) != 2 {
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fmt.Fprintf(os.Stderr, "%s\n", usage)
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os.Exit(1)
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}
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var err error
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var x, y float64
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conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", os.Args[1], robo.Port))
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if err != nil {
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fmt.Fprintf(os.Stderr, "%v\n", err)
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os.Exit(1)
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}
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enc := gob.NewEncoder(conn)
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s := bufio.NewScanner(os.Stdin)
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point := robo.Point{}
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for s.Scan() {
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txt := s.Text()
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parts := strings.Split(txt, ",")
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if len(parts) != 2 {
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err = fmt.Errorf("bad parse from stdin: %q", txt)
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break
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}
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x, err = strconv.ParseFloat(parts[0], 32)
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if err != nil {
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break
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}
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y, err = strconv.ParseFloat(parts[1], 32)
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if err != nil {
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break
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}
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point.X, point.Y = x, y
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fmt.Printf("sending: %+v\n", point)
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err = enc.Encode(point)
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if err != nil {
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break
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}
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}
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if err != nil {
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fmt.Fprintf(os.Stderr, "%v\n", err)
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os.Exit(1)
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}
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if err := s.Err(); err != nil {
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fmt.Fprintf(os.Stderr, "%v\n", err)
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os.Exit(1)
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}
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}
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