added base code

2024-08-17 10:27:36 +02:00
8 changed files with 173 additions and 0 deletions
--- a/config.yml
+++ b/config.yml
@@ -0,0 +1,4 @@
+---
+listen:
+  address: 0.0.0.0
+  port: 80
--- a/go.mod
+++ b/go.mod
@@ -0,0 +1,8 @@
+module git.bjphoster.com/source/yaskm
+
+go 1.22.2
+
+require (
+	github.com/gorilla/mux v1.8.1
+	gopkg.in/yaml.v2 v2.4.0
+)
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,6 @@
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
--- a/main.go
+++ b/main.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+var APP_VERSION string = "latest"
+var COMMIT_ID string = "undefined"
+var ws *WebServer
+
+func main() {
+	// Create a channel to receive the OS signals
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM)
+
+	// Initialize the WebService structure
+	ws = new(WebServer)
+	ws.Initialize()
+
+	// Start the WebService
+	go ws.Start()
+
+	// Wait for a signal
+	<-sc
+	fmt.Println("Shutting down...")
+
+	// Create a context with a timeout for graceful shutdown
+	shCtx, shCancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer shCancel()
+
+	// Shutdown the HTTP server
+	err := ws.HTTPServer.Shutdown(shCtx)
+	if err != nil {
+		fmt.Printf("Server shutdown error: %s", err)
+		os.Exit(1)
+	}
+
+}
--- a/routes.go
+++ b/routes.go
@@ -0,0 +1,7 @@
+package main
+
+import "github.com/gorilla/mux"
+
+func (s *WebServer) Routes(r *mux.Router) {
+	r.HandleFunc("/version", handleVersion).Methods("GET")
+}
--- a/templates/html/version.html
+++ b/templates/html/version.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>{{.Name}}</title>
+    </head>
+    <body>
+        <p>
+            Version: {{.Version}}<br />
+            Commit ID: {{.CommitId}}
+        </p>
+    </body>
+</html>
--- a/type_webserver.go
+++ b/type_webserver.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/gorilla/mux"
+	"gopkg.in/yaml.v2"
+)
+
+type WebServer struct {
+	HTTPServer *http.Server
+	Listen     WSListen `yaml:"listen"`
+}
+
+type WSListen struct {
+	Address string `yaml:"address"`
+	Port    string `yaml:"port"`
+}
+
+func (s *WebServer) Initialize() {
+	// Initialize default values
+	s.Listen = WSListen{
+		Address: "0.0.0.0",
+		Port:    "80",
+	}
+
+	// Attempt to read the config file
+	configFile, err := os.ReadFile("config.yml")
+	if err != nil {
+		if os.IsNotExist(err) {
+			// File does not exist, log and use default config
+			fmt.Println("Config file not found, using default settings.")
+		} else {
+			// Some other error occurred when trying to read the file, exit
+			fmt.Println("Error reading config file:", err)
+			os.Exit(1)
+		}
+	} else {
+		// If the file exists, unmarshal it into the ServiceSettings struct
+		err = yaml.Unmarshal(configFile, &s)
+		if err != nil {
+			fmt.Println("Error parsing config file:", err)
+			os.Exit(1)
+		}
+	}
+}
+
+func (s *WebServer) Start() error {
+	// Create a new MUX router and an HTTP server
+	r := mux.NewRouter()
+	s.HTTPServer = &http.Server{
+		Addr:    s.Listen.Address + ":" + s.Listen.Port,
+		Handler: r,
+	}
+
+	// Associate the various handlers (routes)
+	s.Routes(r)
+
+	// Start the server
+	fmt.Println("Listening on", s.Listen.Address+":"+s.Listen.Port)
+	err := s.HTTPServer.ListenAndServe()
+
+	// Return error, or nil
+	return err
+}
--- a/version.go
+++ b/version.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	_ "embed"
+	"html/template"
+	"net/http"
+)
+
+//go:embed templates/html/version.html
+var versionTemplate string
+
+func handleVersion(w http.ResponseWriter, r *http.Request) {
+	type SiteInfo struct {
+		CommitId string
+		Name     string
+		Version  string
+	}
+
+	tmpl, _ := template.New("version.html").Parse(versionTemplate)
+	// Return (write) the version to the response body
+	tmpl.Execute(w, SiteInfo{
+		CommitId: COMMIT_ID,
+		Name:     "YASKM",
+		Version:  APP_VERSION,
+	})
+}