107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"math/rand"
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"net"
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"os"
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"time"
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)
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func getRandomAddress() string {
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ip1 := rand.Intn(256)
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ip2 := rand.Intn(256)
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ip3 := rand.Intn(256)
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ip4 := rand.Intn(256)
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return fmt.Sprintf("%d.%d.%d.%d", ip1, ip2, ip3, ip4)
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}
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func offgas(r rune) {
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address := getRandomAddress()
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conn, err := net.Dial("udp", address+":7")
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if err != nil {
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fmt.Println("Error connecting to:", address, err)
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}
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defer conn.Close()
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// Set write timeout
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conn.SetWriteDeadline(time.Now().Add(3 * time.Second))
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// Send the character
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_, err = conn.Write([]byte(string(r)))
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if err != nil {
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fmt.Println("Error sending data to:", address, err)
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return
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}
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}
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func main() {
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// get poem.txt and index.html locations from args, if possible
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poemFile := "poem.txt"
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indexFile := "index.html"
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if len(os.Args) == 3 {
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poemFile = os.Args[1]
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indexFile = os.Args[2]
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}
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// get string from poem.txt
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str, err := os.ReadFile(poemFile)
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if err != nil {
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fmt.Println("Error reading file:", err)
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return
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}
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bstr := []byte(str)
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lastRune := rune(0)
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randomByteSwitch := func(r rune) rune {
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dec := rand.Float64()
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if dec < 0.003 {
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lastRune = r
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if r == 10 || r == 13 {
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return r
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}
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char := rand.Float64()
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if char > 0.3 {
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return rune(rand.Int31n(8191) + 97) // a-z
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}
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if char < 0.01 {
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return rand.Int31n(128591-128513) + 128513
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}
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return rand.Int31n(11359)
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}
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if dec < 0.007 {
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if dec > 0.001 && r == 10 || r == 13 {
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if lastRune == 10 || lastRune == 13 {
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offgas(r)
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lastRune = r
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return -1
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}
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lastRune = r
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return r
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}
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offgas(r)
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lastRune = r
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return -1
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}
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return r
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}
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bstr = bytes.Map(randomByteSwitch, bstr)
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outstr := "<!DOCTYPE html><html><head><title>poem, rotting</title><meta name='viewport' content='width=device-width, initial-scale=1' /><link rel='stylesheet' href='style.css' /></head><body><h1>rotting</h1><small>This poem rots over time, eventually disappearing. New words are added to the top of the heap periodically. It offgasses into the internet via random UDP <a href='https://www.rfc-editor.org/rfc/rfc862'>echo packets</a>. Few hosts respond.</small><hr/><p id='poem'>" + string(bstr) + "</p></body></html>"
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// write to index.html
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err = os.WriteFile(indexFile, []byte(outstr), 0644)
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err = os.WriteFile(poemFile, bstr, 0644)
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if err != nil {
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fmt.Println("Error writing file:", err)
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return
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}
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}
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