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main.go
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main.go
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package main
import (
"crypto/tls"
"flag"
"fmt"
"log"
"math/rand"
"net/http"
"time"
"github.com/gorilla/mux"
"golang.org/x/crypto/acme/autocert"
)
var imgs []string
var showid int
var gImgID int
var (
optDomain string
optSecure bool
optPort string
optImgsDir string
optSuffix string
)
var epoch = time.Unix(0, 0).Format(time.RFC1123)
var rd = rand.New(rand.NewSource(time.Now().UnixNano()))
// Taken from https://github.com/mytrile/nocache
var noCacheHeaders = map[string]string{
"Expires": epoch,
"Cache-Control": "no-cache, private, max-age=0",
"Pragma": "no-cache",
"X-Accel-Expires": "0",
}
var etagHeaders = []string{
"ETag",
"If-Modified-Since",
"If-Match",
"If-None-Match",
"If-Range",
"If-Unmodified-Since",
}
func NoCache(w *http.ResponseWriter, r *http.Request) {
return
}
func helloHandler(w http.ResponseWriter, r *http.Request) {
// Delete any ETag headers that may have been set
for _, v := range etagHeaders {
if r.Header.Get(v) != "" {
r.Header.Del(v)
}
}
// Set our NoCache headers
for k, v := range noCacheHeaders {
w.Header().Set(k, v)
}
http.ServeFile(w, r, "form.html")
}
func echoHandler(w http.ResponseWriter, r *http.Request) {
fmt.Println(`echo ...`)
w.Write([]byte("Hello world"))
}
func imgHandler(w http.ResponseWriter, r *http.Request) {
//imgid := rd.Intn(len(imgs) - 1)
imgid := gImgID % len(imgs)
imgDirPath := optImgsDir + `\` + imgs[imgid]
log.Println(`imgDirPath `, imgDirPath)
gImgID = gImgID + 1
// Delete any ETag headers that may have been set
for _, v := range etagHeaders {
if r.Header.Get(v) != "" {
r.Header.Del(v)
}
}
// Set our NoCache headers
for k, v := range noCacheHeaders {
w.Header().Set(k, v)
}
http.ServeFile(w, r, imgDirPath)
}
func main() {
flag.BoolVar(&optSecure, "s", false, "run in secure mode (https)")
flag.StringVar(&optDomain, "n", "sohu.com", "cookie domain")
flag.StringVar(&optImgsDir, "d", "D:\\imgs", "-d : 图片的路径.")
flag.StringVar(&optPort, "p", "80", "listen port")
flag.StringVar(&optSuffix, "f", "jpg;", "img suffix name")
flag.Parse()
gImgID = 0
imgs = LoadImgs(optImgsDir, optSuffix)
if len(imgs) == 0 {
fmt.Println(`指定目录下没有img文件，退出`)
return
}
for i, img := range imgs {
fmt.Println(i, img)
}
rt := mux.NewRouter()
rt.HandleFunc("/", helloHandler)
rt.HandleFunc("/echo", echoHandler)
rt.HandleFunc("/img", imgHandler)
if optSecure {
m := &autocert.Manager{
Prompt: autocert.AcceptTOS,
HostPolicy: autocert.HostWhitelist(optDomain, "www."+optDomain),
Cache: autocert.DirCache("certcache"),
}
go func() {
log.Fatal(http.ListenAndServe(":http",
m.HTTPHandler(nil)))
}()
s := &http.Server{
Addr: ":443",
Handler: rt,
ReadTimeout: 20 * time.Second,
WriteTimeout: 20 * time.Second,
MaxHeaderBytes: 1 << 20,
TLSConfig: &tls.Config{
GetCertificate: m.GetCertificate,
},
}
log.Println("Img server started at 443(https) domain", optDomain, " ...")
err := s.ListenAndServeTLS("", "")
if err != nil {
log.Fatalln(err)
}
} else {
s := &http.Server{
Addr: ":" + optPort,
Handler: rt,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
log.Println("Img server started at", optPort, ", domain", optDomain, " ...")
err := s.ListenAndServe()
if err != nil {
log.Fatalln(err)
}
}
}