Merge pull request 'Add HTTP Server' (#6) from feat/http into dev

Reviewed-on: #6

cmd/svg-templater/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+
+	"tomatentum.net/svg-templater/internal/database"
+	svgtemplater "tomatentum.net/svg-templater/internal/svg-templater"
+	"tomatentum.net/svg-templater/pkg/auth"
+)
+
+var (
+	generateTokenFlag bool
+	deleteTokenFlag   bool
+)
+
+func main() {
+	if err := database.OpenSQLite(); err != nil {
+		log.Fatal("Failed opening DB:\n", err)
+		return
+	}
+	defer database.Close()
+	database.InitDB()
+	prepareCommandLine()
+	prepareHTTP()
+	handleCommandline()
+}
+
+func prepareCommandLine() {
+	flag.BoolVar(&generateTokenFlag, "tokengen", false, "svg-templater --tokengen <name> : Generate token with name")
+	flag.BoolVar(&deleteTokenFlag, "tokendel", false, "svg-templater --tokendel <name> : Delete token with name")
+}
+
+func prepareHTTP() {
+	http.HandleFunc("/", auth.AuthMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "You are authorized!")
+	})))
+}
+
+func handleCommandline() {
+	flag.Parse()
+	if generateTokenFlag {
+		svgtemplater.GenerateTokenCommand()
+	} else if deleteTokenFlag {
+		svgtemplater.DeleteTokenCommand()
+	} else {
+		log.Println("Starting http server on :3000")
+		http.ListenAndServe(":3000", nil)
+	}
+}

go.mod

@@ -1,3 +1,16 @@
-module svg-templater
+module tomatentum.net/svg-templater
 
 go 1.24.9
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/glebarez/go-sqlite v1.22.0 // indirect
+	github.com/google/uuid v1.5.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	modernc.org/libc v1.37.6 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.7.2 // indirect
+	modernc.org/sqlite v1.28.0 // indirect
+)

go.sum

@@ -0,0 +1,21 @@
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/glebarez/go-sqlite v1.22.0 h1:uAcMJhaA6r3LHMTFgP0SifzgXg46yJkgxqyuyec+ruQ=
+github.com/glebarez/go-sqlite v1.22.0/go.mod h1:PlBIdHe0+aUEFn+r2/uthrWq4FxbzugL0L8Li6yQJbc=
+github.com/google/uuid v1.5.0 h1:1p67kYwdtXjb0gL0BPiP1Av9wiZPo5A8z2cWkTZ+eyU=
+github.com/google/uuid v1.5.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
+golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+modernc.org/libc v1.37.6 h1:orZH3c5wmhIQFTXF+Nt+eeauyd+ZIt2BX6ARe+kD+aw=
+modernc.org/libc v1.37.6/go.mod h1:YAXkAZ8ktnkCKaN9sw/UDeUVkGYJ/YquGO4FTi5nmHE=
+modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
+modernc.org/mathutil v1.6.0/go.mod h1:Ui5Q9q1TR2gFm0AQRqQUaBWFLAhQpCwNcuhBOSedWPo=
+modernc.org/memory v1.7.2 h1:Klh90S215mmH8c9gO98QxQFsY+W451E8AnzjoE2ee1E=
+modernc.org/memory v1.7.2/go.mod h1:NO4NVCQy0N7ln+T9ngWqOQfi7ley4vpwvARR+Hjw95E=
+modernc.org/sqlite v1.28.0 h1:Zx+LyDDmXczNnEQdvPuEfcFVA2ZPyaD7UCZDjef3BHQ=
+modernc.org/sqlite v1.28.0/go.mod h1:Qxpazz0zH8Z1xCFyi5GSL3FzbtZ3fvbjmywNogldEW0=

internal/database/database.go

@@ -0,0 +1,34 @@
+package database
+
+import (
+	"database/sql"
+	"log"
+
+	_ "github.com/glebarez/go-sqlite"
+)
+
+const FILENAME string = "storage.db"
+
+var database *sql.DB
+
+func OpenSQLite() error {
+	db, err := sql.Open("sqlite", FILENAME)
+	if err != nil {
+		return err
+	}
+	log.Println("Successfully connected to SQLite Database")
+	database = db
+	return nil
+}
+
+func InitDB() {
+	_, err := database.Exec(TOKENTABLECREATE)
+	if err != nil {
+		log.Fatal("Failed to init database:\n", err)
+	}
+	log.Println("Successfully initiated the Database!")
+}
+
+func Close() error {
+	return database.Close()
+}

internal/database/tokendb.go

@@ -0,0 +1,55 @@
+package database
+
+import (
+	"maps"
+)
+
+const TOKENTABLECREATE string = `
+	CREATE TABLE IF NOT EXISTS tokens (
+		name varchar(32) PRIMARY KEY NOT NULL,
+		token varchar(32) NOT NULL
+	);`
+
+const INSERTTOKENSQL string = "INSERT INTO tokens VALUES (?, ?);"
+const DELETETOKENSQL string = "DELETE FROM tokens WHERE name = ?;"
+const QUERYTOKENSQL string = "SELECT * FROM tokens;"
+
+var tokenCache map[string]string = make(map[string]string)
+
+func InsertToken(name string, token string) error {
+	_, err := database.Exec(INSERTTOKENSQL, name, token)
+	return err
+}
+
+func DeleteToken(name string) error {
+	_, err := database.Exec(DELETETOKENSQL, name)
+	return err
+}
+
+func ValidateTokenCache(token string) (bool, error) {
+	for v := range maps.Values(tokenCache) {
+		if token == v {
+			return true, nil
+		}
+	}
+	return ValidateToken(token)
+}
+
+func ValidateToken(token string) (bool, error) {
+	result, err := database.Query(QUERYTOKENSQL)
+	if err != nil {
+		return false, err
+	}
+	defer result.Close()
+
+	var name, foundToken string
+	for result.Next() {
+		result.Scan(&name, &foundToken)
+		tokenCache[name] = foundToken
+		if token == foundToken {
+			return true, nil
+		}
+	}
+	err = result.Err()
+	return false, err
+}

internal/svg-templater/tokencommands.go

@@ -0,0 +1,34 @@
+package svgtemplater
+
+import (
+	"flag"
+	"log"
+
+	"tomatentum.net/svg-templater/pkg/auth"
+)
+
+func GenerateTokenCommand() {
+	name := flag.Arg(0)
+	if name == "" {
+		log.Fatal("No Token Name was provided!")
+	}
+
+	token, err := auth.CreateToken(name)
+	if err != nil {
+		log.Fatal("Failed to generate token:\n", err)
+	}
+	log.Println(token)
+}
+
+func DeleteTokenCommand() {
+	name := flag.Arg(0)
+	if name == "" {
+		log.Fatal("No Token Name was provided!")
+	}
+
+	err := auth.DeleteToken(name)
+	if err != nil {
+		log.Fatal("Failed to delete token:\n", err)
+	}
+	log.Println("Deleted token " + name)
+}

main.go

@@ -1,5 +0,0 @@
-package main
-
-func main() {
-	println("Hello World")
-}

pkg/auth/auth.go

@@ -0,0 +1,28 @@
+package auth
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"log"
+
+	"tomatentum.net/svg-templater/internal/database"
+)
+
+func generateToken() string {
+	token := make([]byte, 32)
+	if _, err := rand.Read(token); err != nil {
+		log.Fatal("Failed to generate Token:\n", err)
+		return ""
+	}
+	return hex.EncodeToString(token)
+}
+
+func CreateToken(name string) (string, error) {
+	token := generateToken()
+	err := database.InsertToken(name, token)
+	return token, err
+}
+
+func DeleteToken(name string) error {
+	return database.DeleteToken(name)
+}

pkg/auth/authmiddleware.go

@@ -0,0 +1,40 @@
+package auth
+
+import (
+	"log"
+	"net/http"
+	"strings"
+
+	"tomatentum.net/svg-templater/internal/database"
+)
+
+func AuthMiddleware(next http.Handler) http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		valid, err := validateAuthHeader(r)
+		if err != nil {
+			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+			log.Println("Database Query for token validation failed.\n", r)
+			return
+		}
+
+		if valid {
+			next.ServeHTTP(w, r)
+		} else {
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		}
+	})
+}
+
+// Accepts ("Authorization": "BEARER <TOKEN>"), returns database error if query failed
+func validateAuthHeader(r *http.Request) (bool, error) {
+	header := strings.Split(r.Header.Get("Authorization"), " ")
+	if len(header) < 2 {
+		return false, nil
+	}
+	token := header[1]
+	if len(strings.TrimSpace(token)) < 1 {
+		return false, nil
+	}
+
+	return database.ValidateTokenCache(token)
+}