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generated from wheresalice/go_boilerplate
/
proxy.go
118 lines (103 loc) · 2.25 KB
/
proxy.go
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package main
import (
"embed"
_ "embed"
"fmt"
"github.com/gorilla/mux"
"github.com/patrickmn/go-cache"
"github.com/trietmn/go-wiki"
"log"
"net/http"
"os"
"text/template"
"time"
)
//go:embed "wrapper.html.tmpl"
var wrapper string
//go:embed static
var static embed.FS
var Cache = cache.New(5*time.Minute, 5*time.Minute)
type pageData struct {
Title string
Content string
}
func getHTML(pageName string) (pageData, error) {
var pd pageData
data, found := Cache.Get(pageName)
if found {
pd = data.(pageData)
} else {
page, err := gowiki.GetPage(pageName, -1, false, true)
if err != nil {
log.Println(err)
return pageData{}, err
}
content, err := page.GetHTML()
if err != nil {
log.Println(err)
pd = pageData{Title: page.Title, Content: content}
return pd, err
}
pd = pageData{Title: page.Title, Content: content}
Cache.Set(pageName, pd, cache.DefaultExpiration)
}
return pd, nil
}
func getEnv(key, fallback string) string {
if value, ok := os.LookupEnv(key); ok {
return value
}
return fallback
}
func PageHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
t, err := template.New("wrapper").Parse(wrapper)
if err != nil {
log.Println(err)
return
}
pd, err := getHTML(vars["page"])
if err != nil {
w.WriteHeader(http.StatusBadGateway)
_, err := fmt.Fprint(w, err)
if err != nil {
return
}
} else {
w.WriteHeader(http.StatusOK)
err = t.Execute(w, pd)
if err != nil {
log.Println(err)
}
}
}
func HomePageHandler(w http.ResponseWriter, r *http.Request) {
t, err := template.New("wrapper").Parse(wrapper)
if err != nil {
log.Println(err)
return
}
pd, err := getHTML("Main_Page")
if err != nil {
w.WriteHeader(http.StatusBadGateway)
_, err := fmt.Fprint(w, err)
if err != nil {
return
}
} else {
w.WriteHeader(http.StatusOK)
err = t.Execute(w, pd)
if err != nil {
log.Println(err)
}
}
}
func main() {
port := getEnv("PORT", "8080")
r := mux.NewRouter()
r.HandleFunc("/", HomePageHandler)
r.HandleFunc("/wiki/{page}", PageHandler)
r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.FS(static))))
log.Printf("Listening on http://127.0.0.1:%v", port)
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%v", port), r))
}