Http request handling

Author: naeemaei

17-Http/04-RequestManagement/go.mod

@@ -0,0 +1,3 @@
+module http-request-examples
+
+go 1.18

17-Http/04-RequestManagement/handler/users.go

@@ -0,0 +1,65 @@
+package handlers
+
+import (
+"encoding/json"
+"fmt"
+"http-request-examples/models"
+"net/http"
+)
+
+type UsersHandler struct {
+}
+ 
+
+func (u *UsersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+switch {
+
+case r.Method == http.MethodGet && len(r.URL.Query().Get("id")) > 0:
+GetUser(w, r)
+return
+case r.Method == http.MethodGet && len(r.URL.Query().Get("id")) == 0:
+GetUsers(w, r)
+return
+case r.Method == http.MethodPost:
+CreateUser(w, r)
+return
+}
+}
+
+func CreateUser(w http.ResponseWriter, r *http.Request) {
+apiKey := r.Header.Get("X-Api-Key")
+
+for k, v := range r.Header {
+fmt.Println(k, v)
+}
+
+if apiKey != "9289652658659856" {
+w.WriteHeader(401)
+fmt.Fprintf(w, "Invalid API Key")
+return
+}
+
+var user *models.User
+
+err := json.NewDecoder(r.Body).Decode(&user)
+if err != nil {
+w.WriteHeader(500)
+fmt.Fprintf(w, "Decode Error: %v", err)
+return
+} 
+
+w.WriteHeader(200)
+fmt.Fprintf(w, "User created")
+
+}
+
+func GetUser(w http.ResponseWriter, r *http.Request) {
+id := r.URL.Query().Get("id")
+// get form db
+fmt.Fprintf(w, "get user by id: %s", id)
+}
+
+func GetUsers(w http.ResponseWriter, r *http.Request) {
+// get list form db
+fmt.Fprintf(w, "get users")
+}

17-Http/04-RequestManagement/main.go

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+package main
+
+import "http-request-examples/management"
+
+// URL path
+// Get Query Parameters
+// Read Headers
+// Read Request Body
+// Decode body to struct
+
+// Local storage
+// Standard Response
+// Write to header
+// Write Body
+
+func main() {
+management.Run()
+}

17-Http/04-RequestManagement/management/server.go

@@ -0,0 +1,24 @@
+package management
+
+import (
+handlers "http-request-examples/handler"
+"net/http"
+"time"
+)
+
+func Run() {
+mux := http.NewServeMux()
+mux.Handle("/users/", &handlers.UsersHandler{})
+server := &http.Server{
+Addr: ":8080",
+ReadTimeout: time.Second * 10,
+WriteTimeout: time.Second * 10,
+Handler: mux,
+}
+
+err := server.ListenAndServe()
+
+if err != nil {
+panic(err)
+}
+}

17-Http/04-RequestManagement/models/user.go

@@ -0,0 +1,7 @@
+package models
+
+type User struct {
+Id int `json:"id"`
+FullName string `json:"fullName"`
+Age int `json:"age"`
+}