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73 lines
1.8 KiB
73 lines
1.8 KiB
package main
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import (
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"fmt"
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"log"
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"os"
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"net/http"
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"net"
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)
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func get(resp http.ResponseWriter, req *http.Request){
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hostname, err := os.Hostname()
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("get hostname error:%v", err)))
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return
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}
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addrs, err := net.InterfaceAddrs()
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("get ip address error:%v", err)))
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return
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}
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addrString := ""
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for _, addr := range addrs{
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addrString += " " + addr.String()
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}
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resp.Write([]byte(fmt.Sprintf("response from host: %s, ip is:%s", hostname, addrString)))
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}
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//read the file which path is "/data/test.txt"
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func readFile(resp http.ResponseWriter, req *http.Request){
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file, err := os.Open("/data/test.txt")
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("open /data/test.txt error:%v", err)))
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return
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}
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defer file.Close()
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data := make([]byte, 1024)
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n, err := file.Read(data)
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("read /data/test.txt error:%v", err)))
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return
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}
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resp.Write(data[0:n])
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}
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//write a string to the file
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func writeFile(resp http.ResponseWriter, req *http.Request){
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file, err := os.OpenFile("/data/test.txt", os.O_RDWR|os.O_APPEND, os.ModePerm)
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("open /data/test.txt error:%v", err)))
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return
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}
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defer file.Close()
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hostname, _ := os.Hostname()
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_, err = file.Write([]byte(fmt.Sprintf("write by pod %s", hostname)))
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if err != nil {
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resp.Write([]byte(fmt.Sprintf("write /data/test.txt error:%v", err)))
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return
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}
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resp.Write([]byte("write file successed."))
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}
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func main (){
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router := http.DefaultServeMux
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router.HandleFunc("/", get)
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router.HandleFunc("/read", readFile)
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router.HandleFunc("/write", writeFile)
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log.Println("listen on 0.0.0.0:8080")
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err := http.ListenAndServe("0.0.0.0:8080", nil)
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if err != nil {
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log.Fatalln(err)
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}
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}
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