132 lines
2.6 KiB
Go
132 lines
2.6 KiB
Go
package main
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import (
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"database/sql"
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"embed"
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"flag"
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"log"
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"math/rand"
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"net/http"
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"github.com/labstack/echo/v4"
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"github.com/labstack/echo/v4/middleware"
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_ "github.com/mattn/go-sqlite3"
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)
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var (
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db *sql.DB
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dbFilePath string
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port string
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shortIDCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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shortIDLength = 8
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)
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type Bin struct {
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Content string `json:"content"`
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Language string `json:"language"`
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IV string `json:"iv"`
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}
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const (
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insertQuery = "INSERT INTO bins (id, content, language, iv) VALUES (?, ?, ?, ?)"
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selectQuery = "SELECT content, language, iv FROM bins WHERE id = ?"
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)
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//go:embed all:dist
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var dist embed.FS
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func RegisterHandlers(e *echo.Echo) {
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e.Use(middleware.StaticWithConfig(middleware.StaticConfig{
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Root: "dist",
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Index: "index.html",
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HTML5: true,
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Filesystem: http.FS(dist),
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}))
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e.Use(middleware.CORS())
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e.POST("/bin", postBin)
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e.GET("/bin/:id", getBin)
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e.GET("/r/:id", redirectToURL)
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}
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func main() {
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flag.StringVar(&port, "port", "8080", "HTTP server port")
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flag.StringVar(&dbFilePath, "db", "minibin.db", "Path to SQLite database file")
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flag.Parse()
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initDatabase()
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e := echo.New()
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RegisterHandlers(e)
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e.Logger.Fatal(e.Start(":" + port))
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}
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func initDatabase() {
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var err error
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db, err = sql.Open("sqlite3", dbFilePath)
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if err != nil {
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log.Fatal(err)
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}
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if err := createTable(); err != nil {
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log.Fatal(err)
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}
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}
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func postBin(c echo.Context) error {
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var bin Bin
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if err := c.Bind(&bin); err != nil {
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return err
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}
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id := generateShortID()
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if err := saveBin(id, bin); err != nil {
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return err
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}
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return c.JSON(http.StatusCreated, echo.Map{"id": id})
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}
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func getBin(c echo.Context) error {
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id := c.Param("id")
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bin, err := getBinByID(id)
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if err != nil {
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return err
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}
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return c.JSON(http.StatusOK, bin)
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}
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func redirectToURL(c echo.Context) error {
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id := c.Param("id")
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bin, err := getBinByID(id)
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if err != nil {
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c.Logger().Error(err)
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return err
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}
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return c.Redirect(http.StatusFound, bin.Content)
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}
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func createTable() error {
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_, err := db.Exec("CREATE TABLE IF NOT EXISTS bins (id TEXT PRIMARY KEY, content TEXT, language TEXT, iv TEXT)")
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return err
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}
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func getBinByID(id string) (Bin, error) {
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var bin Bin
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row := db.QueryRow(selectQuery, id)
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err := row.Scan(&bin.Content, &bin.Language, &bin.IV)
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return bin, err
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}
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func saveBin(id string, bin Bin) error {
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_, err := db.Exec(insertQuery, id, bin.Content, bin.Language, bin.IV)
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return err
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}
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func generateShortID() string {
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id := make([]byte, shortIDLength)
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for i := range id {
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id[i] = shortIDCharset[rand.Intn(len(shortIDCharset))]
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}
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return string(id)
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}
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