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package main
import (
"bufio"
"fmt"
"io"
"net/http"
"os"
"path"
"time"
"github.com/google/uuid"
"github.com/gorilla/sessions"
"github.com/labstack/echo-contrib/session"
"github.com/labstack/echo/v4"
"github.com/labstack/echo/v4/middleware"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
type Post struct {
CreatedAt time.Time
Description string
ImageID string
}
func main() {
dbPath := os.Getenv("DB_PATH")
if dbPath == "" {
dbPath = "tinygram.db"
}
sessionSecret := os.Getenv("SESSION_SECRET")
if sessionSecret == "" {
fmt.Println("NEED TO PROVIDE A SECRET")
return
}
passwordFilePath := os.Getenv("PASSWORD_FILE_PATH")
if passwordFilePath == "" {
passwordFilePath = "password.txt"
}
assetsPath := os.Getenv("ASSETS_PATH")
if assetsPath == "" {
assetsPath = "assets"
}
swedenTime, _ := time.LoadLocation("Europe/Stockholm")
e := echo.New()
e.Use(middleware.Logger())
e.Use(middleware.Recover())
e.Use(middleware.Secure())
e.Use(middleware.CSRFWithConfig(middleware.CSRFConfig{
TokenLookup: "form:_csrf",
}))
e.Use(session.Middleware(sessions.NewCookieStore([]byte(sessionSecret))))
db, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
db.Exec("PRAGMA journal_mode=WAL; PRAGMA busy_timeout = 5000;")
db.AutoMigrate(Post{})
if err != nil {
fmt.Printf("opening db: %v", err)
}
e.Static("/static", assetsPath)
e.GET("/", func(c echo.Context) error {
var posts []Post
db.Order("created_at DESC").Limit(5).Find(&posts)
component := index(posts, swedenTime)
err := component.Render(c.Request().Context(), c.Response().Writer)
if err != nil {
return err
}
return nil
})
e.GET("/login", func(c echo.Context) error {
component := loginPage(c.Get(middleware.DefaultCSRFConfig.ContextKey).(string))
err := component.Render(c.Request().Context(), c.Response().Writer)
if err != nil {
return err
}
return nil
})
e.POST("/login", func(c echo.Context) error {
// read password file, check content, add session if correct
file, err := os.Open(passwordFilePath)
if err != nil {
c.Response().Header().Set("HX-Redirect", "/")
return c.NoContent(http.StatusUnauthorized)
}
// check provided password against file
s := bufio.NewScanner(file)
s.Scan()
expected := s.Text()
formPass := c.FormValue("password")
if expected != formPass {
c.Response().Header().Set("HX-Redirect", "/")
return c.NoContent(http.StatusUnauthorized)
}
sess, _ := session.Get("session", c)
sess.Options = &sessions.Options{
Path: "/",
MaxAge: 86400 * 7,
HttpOnly: true,
}
sess.Values["user"] = "admin"
sess.Save(c.Request(), c.Response())
c.Response().Header().Set("HX-Redirect", "/upload")
return c.NoContent(http.StatusOK)
})
e.GET("/upload", func(c echo.Context) error {
sess, _ := session.Get("session", c)
if sess.Values["user"] != "admin" {
return c.Redirect(http.StatusSeeOther, "/login")
}
component := uploadPage(c.Get(middleware.DefaultCSRFConfig.ContextKey).(string))
err := component.Render(c.Request().Context(), c.Response().Writer)
if err != nil {
return err
}
return nil
})
e.POST("/upload", func(c echo.Context) error {
sess, _ := session.Get("session", c)
if sess.Values["user"] != "admin" {
return c.Redirect(http.StatusSeeOther, "/login")
}
file, err := c.FormFile("file")
if err != nil {
return err
}
src, err := file.Open()
if err != nil {
return err
}
defer src.Close()
filename, err := uuid.NewRandom()
if err != nil {
return err
}
dst, err := os.Create(path.Join(assetsPath, filename.String())) //RANDOMIZE
if err != nil {
return err
}
defer dst.Close()
// Copy
if _, err = io.Copy(dst, src); err != nil {
return err
}
description := c.FormValue("description")
post := Post{
Description: description,
ImageID: "/static/" + filename.String(),
}
db.Create(&post)
c.Response().Header().Set("HX-Redirect", "/")
return c.NoContent(http.StatusOK)
})
e.GET("/posts", func(c echo.Context) error {
after, err := time.Parse(time.RFC3339, c.QueryParam("after"))
if err != nil {
return err
}
var ps []Post
db.Order("created_at DESC").Limit(5).Where("created_at < ?", after).Find(&ps)
component := posts(ps, swedenTime)
err = component.Render(c.Request().Context(), c.Response().Writer)
if err != nil {
return err
}
return nil
})
e.Logger.Fatal(e.Start(":8080"))
}
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