init

.gitignore

@@ -0,0 +1,2 @@
+.env
+dist

go.mod

@@ -0,0 +1,40 @@
+module firebird_go_rest.com/firebird_go_rest
+
+go 1.20
+
+require (
+	github.com/gin-gonic/gin v1.9.0
+	github.com/nakagami/firebirdsql v0.9.6
+)
+
+require (
+	github.com/bytedance/sonic v1.8.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
+	github.com/shopspring/decimal v1.2.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.9 // indirect
+	gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b // indirect
+	golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	modernc.org/mathutil v1.4.2-0.20220822142738-b13e5b564332 // indirect
+)

go.sum

@@ -0,0 +1,85 @@
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+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+    "github.com/gin-gonic/gin"
+    "os"
+    "database/sql"
+    _ "github.com/nakagami/firebirdsql"
+    "github.com/joho/godotenv"
+    "strings"
+)
+
+type SqlParams struct {
+    Sql     string   `json:"sql"`
+    Params  []interface{} `json:"params"`
+}
+
+func executeSql(c *gin.Context) {
+    var params SqlParams
+
+    if err := c.BindJSON(&params); err != nil {
+        return
+    }
+
+    err := godotenv.Load()
+    if err != nil {
+      panic("Error loading .env file")
+    }
+
+    USERNAME := os.Getenv("USERNAME")
+    PASSWORD := os.Getenv("PASSWORD")
+    HOST := os.Getenv("HOST")
+    PORT := os.Getenv("PORT")
+    DATABASE := os.Getenv("DATABASE")
+
+    connectionString := strings.Join([]string{
+        USERNAME, ":", PASSWORD, "@", HOST, ":", PORT, "/", DATABASE,
+    }, "")
+
+    var db *sql.DB
+    db, _ = sql.Open("firebirdsql", connectionString)
+    rows, err := db.Query(params.Sql, params.Params...)
+    if err != nil {
+        panic(err);
+    }
+    row_json, _ := SQLToJSON(rows)
+    c.JSON(200, row_json)
+}
+
+func main() {
+    router := gin.Default()
+    router.POST("/", executeSql)
+
+    router.Run("localhost:8080")
+}

makefile

@@ -0,0 +1,7 @@
+
+build_windows:
+	GOOS=windows GOARCH=amd64 go build -o ./dist/
+
+build:
+	go build -o ./dist/
+

row2json.go

@@ -0,0 +1,99 @@
+// Modified from https://stackoverflow.com/questions/42774467/how-to-convert-sql-rows-to-typed-json-in-golang
+package main
+
+import (
+    "database/sql"
+    "encoding/json"
+    "fmt"
+    "reflect"
+)
+
+type jsonNullInt64 struct {
+    sql.NullInt64
+}
+
+func (v jsonNullInt64) MarshalJSON() ([]byte, error) {
+    if !v.Valid {
+        return json.Marshal(nil)
+    }
+    return json.Marshal(v.Int64)
+}
+
+type jsonNullFloat64 struct {
+    sql.NullFloat64
+}
+
+func (v jsonNullFloat64) MarshalJSON() ([]byte, error) {
+    if !v.Valid {
+        return json.Marshal(nil)
+    }
+    return json.Marshal(v.Float64)
+}
+/*
+type jsonNullTime struct {
+    mysql.NullTime
+}
+
+func (v jsonNullTime) MarshalJSON() ([]byte, error) {
+    if !v.Valid {
+        return json.Marshal(nil)
+    }
+    return json.Marshal(v.Time)
+}
+*/
+var jsonNullInt64Type = reflect.TypeOf(jsonNullInt64{})
+var jsonNullFloat64Type = reflect.TypeOf(jsonNullFloat64{})
+//var jsonNullTimeType = reflect.TypeOf(jsonNullTime{})
+var nullInt64Type = reflect.TypeOf(sql.NullInt64{})
+var nullFloat64Type = reflect.TypeOf(sql.NullFloat64{})
+//var nullTimeType = reflect.TypeOf(mysql.NullTime{})
+
+// SQLToJSON takes an SQL result and converts it to a nice JSON form. It also
+// handles possibly-null values nicely. See https://stackoverflow.com/a/52572145/265521
+func SQLToJSON(rows *sql.Rows) (map[string][]interface{}, error) {
+    columns, err := rows.Columns()
+    if err != nil {
+        return nil, fmt.Errorf("Column error: %v", err)
+    }
+
+    tt, err := rows.ColumnTypes()
+    if err != nil {
+        return nil, fmt.Errorf("Column type error: %v", err)
+    }
+
+    types := make([]reflect.Type, len(tt))
+    for i, tp := range tt {
+        st := tp.ScanType()
+        if st == nil {
+            return nil, fmt.Errorf("Scantype is null for column: %v", err)
+        }
+        switch st {
+        case nullInt64Type:
+            types[i] = jsonNullInt64Type
+        case nullFloat64Type:
+            types[i] = jsonNullFloat64Type
+/*        case nullTimeType:
+            types[i] = jsonNullTimeType*/
+        default:
+            types[i] = st
+        }
+    }
+
+    values := make([]interface{}, len(tt))
+    data := make(map[string][]interface{})
+
+    for rows.Next() {
+        for i := range values {
+            values[i] = reflect.New(types[i]).Interface()
+        }
+        err = rows.Scan(values...)
+        if err != nil {
+            return nil, fmt.Errorf("Failed to scan values: %v", err)
+        }
+        for i, v := range values {
+            data[columns[i]] = append(data[columns[i]], v)
+        }
+    }
+
+    return data, nil
+}