gowebframework/gowebframework.go
klmp200 a0a41cf8c8
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Removed typo
2018-07-18 20:06:50 +02:00

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Go

/*
* @Author: Bartuccio Antoine
* @Date: 2018-07-14 11:32:11
* @Last Modified by: klmp200
* @Last Modified time: 2018-07-18 20:06:08
*/
package gowebframework
import (
"encoding/json"
"fmt"
"github.com/oxtoacart/bpool"
"html/template"
"io/ioutil"
"log"
"net/http"
"path/filepath"
"time"
)
var templates map[string]*template.Template
var buffer_pool *bpool.BufferPool
type Config struct {
TemplateIncludePath string
TemplateLayoutPath string
MainTemplate string
StaticFolderPath string
TemplateExtensionPattern string
ServerPort string
ServerListenAddress string
SessionProvider string
Domain string
Debug bool
}
var ServerConfig Config
// Load templates and configuration
func Configure(config_file_name string, custom_config_file_name string) {
loadConfiguration(config_file_name, custom_config_file_name)
loadTemplates()
// initialise sessions
SessionProviderRegister(FileSessionProvider{}, "FileProvider")
// Put a session of 1 day duration
ses, err := newSessionManager(ServerConfig.SessionProvider, "GOSESSID", time.Hour*24)
if err != nil {
log.Fatal(err)
}
SESSION = ses
go clearExpiredSessionsCron()
}
// Starts server
func Start() {
http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir(ServerConfig.StaticFolderPath))))
log.Println("Server listening on http://" + ServerConfig.ServerListenAddress + ":" + ServerConfig.ServerPort)
log.Fatal(http.ListenAndServe(ServerConfig.ServerListenAddress+":"+ServerConfig.ServerPort, nil))
}
func loadDefaultConfiguration() {
ServerConfig.StaticFolderPath = "statics/"
ServerConfig.TemplateIncludePath = "templates/"
ServerConfig.TemplateLayoutPath = "templates/layouts/"
ServerConfig.TemplateExtensionPattern = "*.gohtml"
ServerConfig.ServerPort = "8000"
ServerConfig.ServerListenAddress = "0.0.0.0"
ServerConfig.Domain = "localhost"
ServerConfig.MainTemplate = `{{define "main" }} {{ template "base" . }} {{ end }}`
ServerConfig.Debug = false
ServerConfig.SessionProvider = "FileProvider"
}
func loadConfiguration(config_file_name string, custom_config_file_name string) {
loadDefaultConfiguration()
default_settings, err := ioutil.ReadFile(config_file_name)
if err != nil {
log.Println("No " + config_file_name + " found, using default conf instead")
} else {
log.Println("Importing settings")
err = json.Unmarshal(default_settings, &ServerConfig)
if err != nil {
log.Fatal("Malformed " + config_file_name)
}
}
custom_settings, err := ioutil.ReadFile(custom_config_file_name)
if err != nil {
log.Println("No settings_custom.json fonud, skipping")
return
}
log.Println("Importing custom settings")
err = json.Unmarshal(custom_settings, &ServerConfig)
if err != nil {
log.Fatal("Malformed " + custom_config_file_name)
}
}
func loadTemplates() {
if templates == nil {
templates = make(map[string]*template.Template)
}
layoutFiles, err := filepath.Glob(ServerConfig.TemplateLayoutPath + ServerConfig.TemplateExtensionPattern)
if err != nil {
log.Fatal(err)
}
includeFiles, err := filepath.Glob(ServerConfig.TemplateIncludePath + ServerConfig.TemplateExtensionPattern)
if err != nil {
log.Fatal(err)
}
mainTemplate := template.New("main")
mainTemplate, err = mainTemplate.Parse(ServerConfig.MainTemplate)
for _, file := range includeFiles {
fileName := filepath.Base(file)
log.Println("Loading template", fileName)
files := append(layoutFiles, file)
templates[fileName], err = mainTemplate.Clone()
if err != nil {
log.Fatal(err)
}
templates[fileName] = template.Must(templates[fileName].ParseFiles(files...))
}
log.Println("Templates loading successful")
buffer_pool = bpool.NewBufferPool(64)
log.Println("Buffer allocation sucessful")
}
// Renders a template loaded. It allows templat "inheritance" and pass data into it
// Automatic reload if debug mode is enabled
func RenderTemplate(w http.ResponseWriter, name string, data interface{}) {
if ServerConfig.Debug {
loadTemplates()
}
tmpl, is_ok := templates[name]
if !is_ok {
http.Error(w, fmt.Sprintf("The template %s does not exist.", name),
http.StatusInternalServerError)
}
buf := buffer_pool.Get()
defer buffer_pool.Put(buf)
err := tmpl.Execute(buf, data)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
buf.WriteTo(w)
}