[Go] basics and web

2026-03-02 01:47:42 +01:00
parent c88211d161
commit d83f0833ec
11 changed files with 320 additions and 0 deletions
--- a/slides/go/webgo/main.go
+++ b/slides/go/webgo/main.go
@@ -0,0 +1,100 @@
+package main
+
+import (
+	"encoding/json"
+	"html/template"
+	"fmt"
+	"net/http"
+	// "github.com/radovskyb/watcher"
+)
+
+func main(){
+	// w := watcher.New()
+	port := ":8080"
+	http.HandleFunc("/{$}", HtmlContentMiddleware(HomeHandler))
+	http.HandleFunc("/about", HtmlContentMiddleware(AboutHandler))
+	http.HandleFunc("GET /api", HtmlContentMiddleware(ApiHandler))
+	http.HandleFunc("POST /api", HtmlContentMiddleware(ApiHandler))
+	http.HandleFunc("/", NotFoundHandler)
+
+	fmt.Println("http://localhost"+port)
+	http.ListenAndServe(port, nil)
+}
+
+type handleFunc func(w http.ResponseWriter, r *http.Request) 
+
+func HtmlContentMiddleware(f handleFunc) handleFunc {
+	return func(w http.ResponseWriter, r *http.Request){
+		w.Header().Add("Content-Type", "text/html")
+		f(w,r)
+	}
+}
+
+
+func HomeHandler(w http.ResponseWriter, r *http.Request){
+
+	// data := struct{
+	// 	Name string
+	// }{
+	// 	Name: "Coja",
+	// }
+
+	temp := template.New("home")
+	temp.Parse(baseTemplate)
+	temp.Execute(w,messages)
+
+	// home := "<html><body><i>Hello world</i></body></html>"
+	// w.Header().Add("Content-Type", "text/html")
+
+	w.Write(temp)
+}
+
+func AboutHandler(w http.ResponseWriter, r *http.Request){
+	// w.Header().Add("Content-Type", "text/html")
+	w.Write([]byte("about"))
+}
+
+func NotFoundHandler(w http.ResponseWriter, r *http.Request){
+	// w.Header().Add("Content-Type", "text/html")
+	w.WriteHeader(http.StatusNotFound)
+	w.Write([]byte("404 Not Found"))
+}
+
+func ApiHandler(w http.ResponseWriter, r *http.Request){
+	w.Header().Add("Content-Type", "application/json")
+	w.WriteHeader(http.StatusNotFound)
+	// w.Write([]byte("[1,2,3]"))
+	var filteredMessages []Message
+	userParam := r.URL.Query().Get("user")
+
+	if userParam != ""{
+		for _ ,m:=range messages {
+			if userParam == m.User{
+				filteredMessages = append(filteredMessages, m)
+			}
+		}
+	} else{
+			filteredMessages = messages
+	}
+	json.NewEncoder(w).Encode(filteredMessages)
+}
+
+func NewMessageHandler(w http.ResponseWriter, r *http.Request){
+
+	var message Message
+
+	err :=  json.NewDecoder(r.Body).Decode(&message)
+	userParam := r.URL.Query().Get("user")
+
+	if err != nil{
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	if userParam != ""{
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	// messages.append(messages, message)
+}