More error handling

.gitignore

@@ -1,3 +1,4 @@
 config.ini
 database.db
 burgerauth
+.idea

main.go

@@ -6,6 +6,7 @@ import (
 	"database/sql"
 	"encoding/base64"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"os"
 	"regexp"
@@ -20,7 +21,7 @@ import (
 	"golang.org/x/crypto/scrypt"
 )
 
-const SALT_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+const salt_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 
 func genSalt(length int) string {
 	if length <= 0 {
@@ -35,7 +36,7 @@ func genSalt(length int) string {
 	}
 
 	for i := range salt {
-		salt[i] = SALT_CHARS[int(randomBytes[i])%len(SALT_CHARS)]
+		salt[i] = salt_chars[int(randomBytes[i])%len(salt_chars)]
 	}
 	return string(salt)
 }
@@ -76,12 +77,17 @@ func get_db_connection() *sql.DB {
 
 func get_user(id int) (string, string, string, bool) {
 	conn := get_db_connection()
-	defer conn.Close()
+	defer func(conn *sql.DB) {
+		err := conn.Close()
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in get_user() defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+		}
+	}(conn)
 	var created, username, password string
 	err := conn.QueryRow("SELECT created, username, password FROM users WHERE id = ? LIMIT 1", id).Scan(&created, &username, &password)
 	norows := false
 	if err != nil {
-		if err == sql.ErrNoRows {
+		if errors.Is(err, sql.ErrNoRows) {
 			norows = true
 		} else {
 			fmt.Println("[ERROR] Unknown in get_user() at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -93,12 +99,17 @@ func get_user(id int) (string, string, string, bool) {
 
 func get_user_from_session(session string) (int, bool) {
 	conn := get_db_connection()
-	defer conn.Close()
+	defer func(conn *sql.DB) {
+		err := conn.Close()
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in get_user_from_session() defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+		}
+	}(conn)
 	var id int
 	err := conn.QueryRow("SELECT id FROM sessions WHERE session = ? LIMIT 1", session).Scan(&id)
 	norows := false
 	if err != nil {
-		if err == sql.ErrNoRows {
+		if errors.Is(err, sql.ErrNoRows) {
 			norows = true
 		} else {
 			fmt.Println("[ERROR] Unknown in get_user_from_session() at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -110,12 +121,17 @@ func get_user_from_session(session string) (int, bool) {
 
 func check_username_taken(username string) (int, bool) {
 	conn := get_db_connection()
-	defer conn.Close()
+	defer func(conn *sql.DB) {
+		err := conn.Close()
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in check_username_taken() defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+		}
+	}(conn)
 	var id int
 	err := conn.QueryRow("SELECT id FROM users WHERE lower(username) = ? LIMIT 1", username).Scan(&id)
 	norows := false
 	if err != nil {
-		if err == sql.ErrNoRows {
+		if errors.Is(err, sql.ErrNoRows) {
 			norows = true
 		} else {
 			fmt.Println("[ERROR] Unknown in get_user() at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -134,7 +150,11 @@ func init_db() {
 	} else {
 		fmt.Print("Proceeding will overwrite the database. Proceed? (y/n) ")
 		var answer string
-		fmt.Scanln(&answer)
+		_, err := fmt.Scanln(&answer)
+		if err != nil {
+			fmt.Println("[ERROR] Unknown while scanning input at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 		if answer == "y" || answer == "Y" {
 			if err := generateDB(); err != nil {
 				fmt.Println("[ERROR] Unknown while generating database at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -153,7 +173,12 @@ func generateDB() error {
 	if err != nil {
 		return err
 	}
-	defer db.Close()
+	defer func(db *sql.DB) {
+		err := db.Close()
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in generateDB() defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+		}
+	}(db)
 
 	schemaBytes, err := os.ReadFile("schema.sql")
 	if err != nil {
@@ -260,7 +285,11 @@ func main() {
 
 	router.POST("/api/signup", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		username := data["username"].(string)
 		password := data["password"].(string)
@@ -280,23 +309,40 @@ func main() {
 		hashedPassword := hash(password, genSalt(16))
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/signup defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
-		conn.Exec("INSERT INTO users (username, password, created, uniqueid) VALUES (?, ?, ?, ?)", username, hashedPassword, strconv.FormatInt(time.Now().Unix(), 10), genSalt(512))
+		_, err = conn.Exec("INSERT INTO users (username, password, created, uniqueid) VALUES (?, ?, ?, ?)", username, hashedPassword, strconv.FormatInt(time.Now().Unix(), 10), genSalt(512))
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/signup user creation at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 		fmt.Println("[INFO] Added new user at", time.Now().Unix())
 
 		userid, _ := check_username_taken(username)
 
 		randomchars := genSalt(512)
 
-		conn.Exec("INSERT INTO sessions (session, id, device) VALUES (?, ?, ?)", randomchars, userid, c.Request.Header.Get("User-Agent"))
+		_, err = conn.Exec("INSERT INTO sessions (session, id, device) VALUES (?, ?, ?)", randomchars, userid, c.Request.Header.Get("User-Agent"))
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/signup session creation at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 
 		c.JSON(200, gin.H{"key": randomchars})
 	})
 
 	router.POST("/api/login", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		username := data["username"].(string)
 		password := data["password"].(string)
@@ -320,13 +366,26 @@ func main() {
 		randomchars := genSalt(512)
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/login defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
-		conn.Exec("INSERT INTO sessions (session, id, device) VALUES (?, ?, ?)", randomchars, userid, c.Request.Header.Get("User-Agent"))
+		_, err = conn.Exec("INSERT INTO sessions (session, id, device) VALUES (?, ?, ?)", randomchars, userid, c.Request.Header.Get("User-Agent"))
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/login session creation at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 
 		if passwordchange == "yes" {
 			hashpassword := hash(newpass, "")
-			conn.Exec("UPDATE users SET password = ? WHERE username = ?", hashpassword, username)
+			_, err = conn.Exec("UPDATE users SET password = ? WHERE username = ?", hashpassword, username)
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/login password change at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+				return
+			}
 		}
 
 		c.JSON(200, gin.H{"key": randomchars})
@@ -334,7 +393,11 @@ func main() {
 
 	router.POST("/api/userinfo", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretkey := data["secretKey"].(string)
 
@@ -359,14 +422,19 @@ func main() {
 		token := strings.Fields(c.Request.Header["Authorization"][0])[1]
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /userinfo defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 		var blacklisted bool
 		err := conn.QueryRow("SELECT blacklisted FROM blacklist WHERE openid = ? LIMIT 1", token).Scan(&blacklisted)
 		if err == nil {
 			c.JSON(400, gin.H{"error": "Token is in blacklist"})
 			return
 		} else {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /userinfo blacklist at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				return
 			}
@@ -417,19 +485,28 @@ func main() {
 
 	router.POST("/api/uniqueid", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		token := data["access_token"].(string)
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/uniqueid defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 		var blacklisted bool
-		err := conn.QueryRow("SELECT blacklisted FROM blacklist WHERE token = ? LIMIT 1", token).Scan(&blacklisted)
+		err = conn.QueryRow("SELECT blacklisted FROM blacklist WHERE token = ? LIMIT 1", token).Scan(&blacklisted)
 		if err == nil {
 			c.JSON(400, gin.H{"error": "Token is in blacklist"})
 			return
 		} else {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/uniqueid blacklist at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				return
 			}
@@ -471,7 +548,7 @@ func main() {
 		var uniqueid string
 		err = conn.QueryRow("SELECT uniqueid FROM users WHERE id = ? LIMIT 1", userid).Scan(&uniqueid)
 		if err != nil {
-			if err == sql.ErrNoRows {
+			if errors.Is(err, sql.ErrNoRows) {
 				c.JSON(400, gin.H{"error": "User does not exist"})
 				return
 			} else {
@@ -509,7 +586,15 @@ func main() {
 
 		var appidcheck, rdiruricheck string
 
-		conn.QueryRow("SELECT appId, rdiruri FROM oauth WHERE appId = ? LIMIT 1", appId).Scan(&appidcheck, &rdiruricheck)
+		err := conn.QueryRow("SELECT appId, rdiruri FROM oauth WHERE appId = ? LIMIT 1", appId).Scan(&appidcheck, &rdiruricheck)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				c.String(401, "OAuth screening failed")
+			} else {
+				fmt.Println("[ERROR] Unknown in /api/auth at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+			return
+		}
 
 		if !(rdiruricheck == redirect_uri) {
 			c.String(401, "Redirect URI does not match")
@@ -544,18 +629,26 @@ func main() {
 		secret_token, _ := jwt.NewWithClaims(jwt.SigningMethodHS256, datatemplate2).SignedString([]byte(SECRET_KEY))
 		randombytes := genSalt(512)
 
-		conn.Exec("INSERT INTO logins (appId, secret, nextsecret, code, nextcode, creator, openid, nextopenid, pkce, pkcemethod) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", appId, randombytes, "none", secret_token, "none", userid, jwt_token, "none", code, codemethod)
+		_, err = conn.Exec("INSERT INTO logins (appId, secret, nextsecret, code, nextcode, creator, openid, nextopenid, pkce, pkcemethod) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", appId, randombytes, "none", secret_token, "none", userid, jwt_token, "none", code, codemethod)
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/auth insert at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 
 		if randombytes != "" {
 			c.Redirect(302, redirect_uri+"?code="+randombytes+"&state="+state)
 		} else {
 			c.String(500, "Something went wrong on our end. Please report this bug at https://centrifuge.hectabit.org/hectabit/burgerauth and refer to the docs for more detail. Include this error code: Secretkey not found.")
-			fmt.Println("[ERROR] Secretkey not found at", time.Now().Unix())
+			fmt.Println("[ERROR] Secretkey not found at", strconv.FormatInt(time.Now().Unix(), 10))
 		}
 	})
 
 	router.POST("/api/tokenauth", func(c *gin.Context) {
-		c.Request.ParseForm()
+		err := c.Request.ParseForm()
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid form data"})
+			return
+		}
 		data := c.Request.Form
 
 		appId := data.Get("client_id")
@@ -571,11 +664,24 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/tokenauth defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
 		var appidcheck, secretcheck, openid, logincode, pkce, pkcemethod string
 
-		conn.QueryRow("SELECT o.appId, o.secret, l.openid, l.code, l.pkce, l.pkcemethod FROM oauth AS o JOIN logins AS l ON o.appId = l.appId WHERE o.appId = ? AND l.secret = ? LIMIT 1;", appId, code).Scan(&appidcheck, &secretcheck, &openid, &logincode, &pkce, &pkcemethod)
+		err = conn.QueryRow("SELECT o.appId, o.secret, l.openid, l.code, l.pkce, l.pkcemethod FROM oauth AS o JOIN logins AS l ON o.appId = l.appId WHERE o.appId = ? AND l.secret = ? LIMIT 1;", appId, code).Scan(&appidcheck, &secretcheck, &openid, &logincode, &pkce, &pkcemethod)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				c.JSON(401, gin.H{"error": "OAuth screening failed"})
+			} else {
+				fmt.Println("[ERROR] Unknown in /api/tokenauth at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+			return
+		}
 		if appidcheck != appId {
 			c.JSON(401, gin.H{"error": "OAuth screening failed"})
 			return
@@ -608,14 +714,22 @@ func main() {
 			}
 		}
 
-		conn.Exec("DELETE FROM logins WHERE code = ?", logincode)
+		_, err = conn.Exec("DELETE FROM logins WHERE code = ?", logincode)
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/tokenauth delete at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 
 		c.JSON(200, gin.H{"access_token": logincode, "token_type": "bearer", "expires_in": 2592000, "id_token": openid})
 	})
 
 	router.POST("/api/deleteauth", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 		appId := data["appId"].(string)
@@ -627,10 +741,15 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
-		_, err := conn.Exec("DELETE FROM oauth WHERE appId = ? AND creator = ?", appId, id)
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/deleteauth defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
+		_, err = conn.Exec("DELETE FROM oauth WHERE appId = ? AND creator = ?", appId, id)
 		if err != nil {
-			if err == sql.ErrNoRows {
+			if errors.Is(err, sql.ErrNoRows) {
 				c.JSON(400, gin.H{"error": "AppID Not found"})
 			} else {
 				fmt.Println("[ERROR] Unknown in /api/deleteauth at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -643,7 +762,11 @@ func main() {
 
 	router.POST("/api/newauth", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 		appId := data["appId"].(string)
@@ -658,12 +781,17 @@ func main() {
 		var testsecret string
 		secret := genSalt(512)
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/newauth defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
 		for {
 			err := conn.QueryRow("SELECT secret FROM oauth WHERE secret = ?", secret).Scan(&testsecret)
 			if err != nil {
-				if err == sql.ErrNoRows {
+				if errors.Is(err, sql.ErrNoRows) {
 					break
 				} else {
 					fmt.Println("[ERROR] Unknown in /api/newauth secretselect at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -675,9 +803,9 @@ func main() {
 			}
 		}
 
-		_, err := conn.Exec("SELECT secret FROM oauth WHERE appId = ?", appId)
+		_, err = conn.Exec("SELECT secret FROM oauth WHERE appId = ?", appId)
 		if err != nil {
-			if err == sql.ErrNoRows {
+			if errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[Info] New Oauth source added with ID:", appId)
 			} else {
 				fmt.Println("[ERROR] Unknown in /api/newauth at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -688,14 +816,22 @@ func main() {
 			secret = genSalt(512)
 		}
 
-		conn.Exec("INSERT INTO oauth (appId, creator, secret, rdiruri) VALUES (?, ?, ?, ?)", appId, id, secret, rdiruri)
+		_, err = conn.Exec("INSERT INTO oauth (appId, creator, secret, rdiruri) VALUES (?, ?, ?, ?)", appId, id, secret, rdiruri)
+		if err != nil {
+			fmt.Println("[ERROR] Unknown in /api/newauth insert at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			return
+		}
 
 		c.JSON(200, gin.H{"key": secret})
 	})
 
 	router.POST("/api/listauth", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 
@@ -706,14 +842,24 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/listauth defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
 		rows, err := conn.Query("SELECT appId FROM oauth WHERE creator = ? ORDER BY creator DESC", id)
 		if err != nil {
 			c.JSON(500, gin.H{"error": "Failed to query database"})
 			return
 		}
-		defer rows.Close()
+		defer func(rows *sql.Rows) {
+			err := rows.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/listauth rows close at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(rows)
 
 		var datatemplate []map[string]interface{}
 		for rows.Next() {
@@ -735,7 +881,11 @@ func main() {
 
 	router.POST("/api/deleteaccount", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 
@@ -746,11 +896,16 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/deleteaccount defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
-		_, err := conn.Exec("DELETE FROM userdata WHERE AND creator = ?", id)
+		_, err = conn.Exec("DELETE FROM userdata WHERE creator = ?", id)
 		if err != nil {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/deleteuser userdata at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				c.JSON(500, gin.H{"error": "Unknown error occured"})
 			}
@@ -758,7 +913,7 @@ func main() {
 
 		_, err = conn.Exec("DELETE FROM logins WHERE creator = ?", id)
 		if err != nil {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/deleteuser logins at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				c.JSON(500, gin.H{"error": "Unknown error occured"})
 			}
@@ -766,7 +921,7 @@ func main() {
 
 		_, err = conn.Exec("DELETE FROM oauth WHERE creator = ?", id)
 		if err != nil {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/deleteuser oauth at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				c.JSON(500, gin.H{"error": "Unknown error occured"})
 			}
@@ -774,7 +929,7 @@ func main() {
 
 		_, err = conn.Exec("DELETE FROM users WHERE id = ?", id)
 		if err != nil {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/deleteuser logins at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				c.JSON(500, gin.H{"error": "Unknown error occured"})
 			}
@@ -785,7 +940,11 @@ func main() {
 
 	router.POST("/api/sessions/list", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 
@@ -796,16 +955,26 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/sessions/list defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
 
 		rows, err := conn.Query("SELECT sessionid, session, device FROM sessions WHERE id = ? ORDER BY id DESC", id)
 		if err != nil {
-			if err != sql.ErrNoRows {
+			if !errors.Is(err, sql.ErrNoRows) {
 				fmt.Println("[ERROR] Unknown in /api/sessions/list at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 				c.JSON(500, gin.H{"error": "Unknown error occured"})
 			}
 		}
-		defer rows.Close()
+		defer func(rows *sql.Rows) {
+			err := rows.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/sessions/list rows close at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(rows)
 
 		var datatemplate []map[string]interface{}
 		for rows.Next() {
@@ -831,7 +1000,11 @@ func main() {
 
 	router.POST("/api/sessions/remove", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		secretKey := data["secretKey"].(string)
 		sessionId := data["sessionId"].(string)
@@ -843,10 +1016,15 @@ func main() {
 		}
 
 		conn := get_db_connection()
-		defer conn.Close()
+		defer func(conn *sql.DB) {
-		_, err := conn.Exec("DELETE FROM sessions WHERE sessionid = ? AND id = ?", sessionId, id)
+			err := conn.Close()
+			if err != nil {
+				fmt.Println("[ERROR] Unknown in /api/sessions/remove defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+			}
+		}(conn)
+		_, err = conn.Exec("DELETE FROM sessions WHERE sessionid = ? AND id = ?", sessionId, id)
 		if err != nil {
-			if err == sql.ErrNoRows {
+			if errors.Is(err, sql.ErrNoRows) {
 				c.JSON(422, gin.H{"error": "SessionID Not found"})
 			} else {
 				fmt.Println("[ERROR] Unknown in /api/sessions/remove at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
@@ -859,22 +1037,36 @@ func main() {
 
 	router.POST("/api/listusers", func(c *gin.Context) {
 		var data map[string]interface{}
-		c.ShouldBindJSON(&data)
+		err := c.ShouldBindJSON(&data)
+		if err != nil {
+			c.JSON(400, gin.H{"error": "Invalid JSON"})
+			return
+		}
 
 		masterkey := data["masterkey"].(string)
 
 		if masterkey == SECRET_KEY {
 			conn := get_db_connection()
-			defer conn.Close()
+			defer func(conn *sql.DB) {
+				err := conn.Close()
+				if err != nil {
+					fmt.Println("[ERROR] Unknown in /api/listusers defer at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+				}
+			}(conn)
 
 			rows, err := conn.Query("SELECT * FROM users ORDER BY id DESC")
 			if err != nil {
-				if err != sql.ErrNoRows {
+				if !errors.Is(err, sql.ErrNoRows) {
 					fmt.Println("[ERROR] Unknown in /api/listusers at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
 					c.JSON(500, gin.H{"error": "Unknown error occured"})
 				}
 			}
-			defer rows.Close()
+			defer func(rows *sql.Rows) {
+				err := rows.Close()
+				if err != nil {
+					fmt.Println("[ERROR] Unknown in /api/listusers rows close at", strconv.FormatInt(time.Now().Unix(), 10)+":", err)
+				}
+			}(rows)
 
 			var datatemplate []map[string]interface{}
 			for rows.Next() {
@@ -897,5 +1089,9 @@ func main() {
 
 	fmt.Println("[INFO] Server started at", time.Now().Unix())
 	fmt.Println("[INFO] Welcome to Burgerauth! Today we are running on IP " + HOST + " on port " + strconv.Itoa(PORT) + ".")
-	router.Run(HOST + ":" + strconv.Itoa(PORT))
+	err := router.Run(HOST + ":" + strconv.Itoa(PORT))
+	if err != nil {
+		fmt.Println("[FATAL] Server failed to start at", time.Now().Unix(), err)
+		return
+	}
 }

schema.sql

@@ -23,7 +23,7 @@ CREATE TABLE sessions (
     sessionid INTEGER PRIMARY KEY AUTOINCREMENT,
     session TEXT NOT NULL,
     id INTEGER NOT NULL,
-    device TEXT NOT NULL DEFAULT "?"
+    device TEXT NOT NULL DEFAULT '?'
 );
 
 CREATE TABLE logins (