ranpas: remove all dependencies except stdlib

Signed-off-by: Nagy Károly Gábriel <k@jpi.io>

main.go

@@ -2,11 +2,10 @@ package main
 
 import (
 	"flag"
+	"fmt"
+	"log"
 	"net/http"
 	"strconv"
-
-	"github.com/labstack/echo"
-	"github.com/labstack/echo/middleware"
 )
 
 type passwordData struct {
@@ -20,48 +19,75 @@ type passwordData struct {
 
 var d, defaults passwordData
 
-func generatePassword(c echo.Context) error {
-
+func generatePassword(w http.ResponseWriter, r *http.Request) {
 	var err error
 
-	d.Length, err = strconv.Atoi(c.FormValue("length"))
-	if err != nil {
-		d.Length = defaults.Length
+	if r.URL.Path != "/" {
+		http.Error(w, "404 not found.", http.StatusNotFound)
+		return
 	}
 
-	d.Digits, err = strconv.Atoi(c.FormValue("digits"))
-	if err != nil {
-		d.Digits = defaults.Digits
-	}
+	switch r.Method {
+	case "GET":
+		d.Password, err = generate(defaults.Length, defaults.Digits, defaults.Symbols, false, false)
+		if err != nil {
+			d.Password = "Error: " + err.Error()
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(d.Password))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(d.Password))
+	case "POST":
+		if err = r.ParseForm(); err != nil {
+			w.WriteHeader(http.StatusUnprocessableEntity)
+			w.Write([]byte(fmt.Sprintf("ParseForm() err: %v", err)))
+			return
+		}
+		d.Length, err = strconv.Atoi(r.FormValue("length"))
+		if err != nil {
+			d.Length = defaults.Length
+		}
 
-	d.Symbols, err = strconv.Atoi(c.FormValue("symbols"))
-	if err != nil {
-		d.Symbols = defaults.Symbols
-	}
+		d.Digits, err = strconv.Atoi(r.FormValue("digits"))
+		if err != nil {
+			d.Digits = defaults.Digits
+		}
 
-	if c.FormValue("noupper") == "on" {
-		d.NoUpper = true
-	}
+		d.Symbols, err = strconv.Atoi(r.FormValue("symbols"))
+		if err != nil {
+			d.Symbols = defaults.Symbols
+		}
 
-	if c.FormValue("denyrepeat") == "on" {
-		d.DenyRepeat = true
-	}
+		if r.FormValue("noupper") == "on" {
+			d.NoUpper = true
+		}
 
-	// Generate a password
-	d.Password, err = generate(d.Length, d.Digits, d.Symbols, d.NoUpper, !d.DenyRepeat)
-	if err != nil {
-		d.Password = "Error: " + err.Error()
-	}
-	if d.Length == 0 {
-		d.Password = "Error: password can not have zero length"
-	}
+		if r.FormValue("denyrepeat") == "on" {
+			d.DenyRepeat = true
+		}
 
-	return c.String(http.StatusOK, d.Password)
+		d.Password, err = generate(d.Length, d.Digits, d.Symbols, d.NoUpper, !d.DenyRepeat)
+		if err != nil {
+			d.Password = "Error: " + err.Error()
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(d.Password))
+			return
+		}
+		if d.Length == 0 {
+			d.Password = "Error: password can not have zero length"
+		}
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(d.Password))
+	default:
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("Sorry, only GET and POST methods are supported."))
+	}
 }
 
-func checkHealth(c echo.Context) error {
-	s := `{"status":"OK"}`
-	return c.String(http.StatusOK, s)
+func checkHealth(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte("Status:OK"))
 }
 
 func main() {
@@ -77,17 +103,8 @@ func main() {
 	defaults.Digits = *digitsPtr
 	defaults.Symbols = *symbolsPtr
 
-	e := echo.New()
-	e.HideBanner = true
+	http.HandleFunc("/", generatePassword)
+	http.HandleFunc("/health", checkHealth)
 
-	// Middleware
-	e.Use(middleware.Logger())
-	e.Use(middleware.Recover())
-
-	e.GET("/", generatePassword)
-	e.POST("/", generatePassword)
-
-	e.GET("/health", checkHealth)
-
-	e.Logger.Fatal(e.Start(":" + strconv.Itoa(*portPtr)))
+	log.Fatal(http.ListenAndServe(":"+strconv.Itoa(*portPtr), nil))
 }