Better minecraft pinger
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parent
084cc9d297
commit
d74b7e1415
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@ -4,12 +4,13 @@ import (
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"net"
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"fmt"
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"time"
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"sync"
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)
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const MAGIC = "\x00\xff\xff\x00\xfe\xfe\xfe\xfe\xfd\xfd\xfd\xfd\x12\x34\x56\x78"
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func isAlive() bool {
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conn, err := net.Dial("udp", "h.woozle.org:30919")
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func isAlive(host string) bool {
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conn, err := net.Dial("udp", host)
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if err != nil {
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return false
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}
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@ -28,24 +29,54 @@ func isAlive() bool {
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return true
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}
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var wg sync.WaitGroup
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func waitClose(c chan<- string) {
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wg.Wait()
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close(c)
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}
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type HostEntry struct {
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host string
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owner string
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}
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var hosts = []HostEntry{
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{"h.woozle.org:30919", "Ginnie"},
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{"h.woozle.org:44321", "Neale"},
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{"h.woozle.org:58000", "Amy"},
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}
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func ping(results chan<- string, e HostEntry) {
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defer wg.Done()
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if isAlive(e.host) {
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results <- fmt.Sprintf("%s is playing at %s", e.owner, e.host)
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}
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}
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func main() {
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results := make(chan string, 5)
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for _, host := range hosts {
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wg.Add(1)
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go ping(results, host)
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}
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go waitClose(results)
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fmt.Println("Content-type: text/html")
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fmt.Println("")
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fmt.Println("<!DOCTYPE html>")
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fmt.Println("<html>")
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fmt.Println("<head>")
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fmt.Println("<meta name=\"viewport\" content=\"width=device-width\">")
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fmt.Println("<style type=\"text/css\">#a{font-size: 500%; text-align: center; background: silver;}</style>")
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fmt.Println("<title>Is Ginnie playing Minecraft PE?</title></head>")
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fmt.Println("<style type=\"text/css\">#a{font-size: 120%; background: silver;}</style>")
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fmt.Println("<title>Minecraft PE ping</title></head>")
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fmt.Println("<body>")
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fmt.Println("<h1>Is Ginnie playing Minecraft PE?</h1>")
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fmt.Println("<p id=\"a\">")
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if isAlive() {
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fmt.Println("yes")
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} else {
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fmt.Println("no")
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fmt.Println("<h1>Are The Picketts playing Minecraft PE?</h1>")
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fmt.Println("<ul id=\"a\">")
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for msg := range results {
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fmt.Printf("<li>%s</li>\n", msg)
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}
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fmt.Println("</p>")
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fmt.Println("<p>Use the external server address <code>h.woozle.org</code>, port <code>30919</code> to join in.</p>")
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fmt.Println("</ul>")
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fmt.Println("</body></html>")
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}
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@ -4,7 +4,62 @@ All bets are for $1.
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Neale's prediction is the one stated.
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Los Angeles Population (Blake)
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------------------------------
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==============================
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On Feb 24, 2029, the metropolitan area commonly known as "Los Angeles"
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will have, at most recent measure, double-digit population decrease.
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Neale's Rationale
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-----------------
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LA uses a ton of fresh water, brought in from all over the place.
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As droughts worsen, there will be increasingly large fights over water.
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Regardless of the political outcome,
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places closer to fresh water will tend to keep that water.
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LA is not close to fresh water.
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Las Vegas is going to have the same problem,
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but predicting the collapse of Las Vegas didn't seem as challenging.
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------
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This Page (Nemo Thorx)
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======================
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By 7 December, 2028, Neale will have updated this web page
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within the last 12 months.
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Neale's Rationale
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-----------------
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I actually think Nemo's right,
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but this was such an amusing bet,
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I couldn't turn it down.
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------
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DC Power (Nobody yet!)
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======================
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By 2030, over ⅓ of US residences currently being built will be wired with a DC power bus.
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Neale's Rationale
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-----------------
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When I counted in 2014, we had only 5 electrical devices
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that used Alternating Current.
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Everything else ran off a "wall wart":
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an AC to DC transformer.
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In addition to DC being tremendously safer
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(it won't stop Junior's heart when he sticks a fork in a USB port),
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it's also potentially more efficient to have a single transformer for the entire house.
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As more houses move to solar power with battery storage,
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the conversion from DC batteries to AC wall power,
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just to be converted again to DC,
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will be a tantalizing inefficiency to conquer.
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And with the introduction in 2015 of USB delivering up to 100W,
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there will even be a standard to use.
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