105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package utccheck
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import (
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"context"
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"database/sql"
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"time"
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"github.com/zeebo/errs"
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)
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// TODO: implement this in terms of a driver rather than as a wrapper for DB.
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// DB wraps a sql.DB and checks all of the arguments to queries to ensure they are in UTC.
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type DB struct {
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*sql.DB
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}
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// New creates a new database that checks that all time arguments are UTC.
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func New(db *sql.DB) *DB {
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return &DB{DB: db}
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}
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// Close closes the database.
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func (db DB) Close() error { return db.DB.Close() }
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// Query executes Query after checking all of the arguments.
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func (db DB) Query(sql string, args ...interface{}) (*sql.Rows, error) {
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if err := utcCheckArgs(args); err != nil {
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return nil, err
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}
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return db.DB.Query(sql, args...)
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}
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// QueryRow executes QueryRow after checking all of the arguments.
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func (db DB) QueryRow(sql string, args ...interface{}) *sql.Row {
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// TODO(jeff): figure out a way to return an errored *sql.Row so we can consider
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// enabling all of these checks in production.
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if err := utcCheckArgs(args); err != nil {
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panic(err)
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}
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return db.DB.QueryRow(sql, args...)
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}
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// QueryContext executes QueryContext after checking all of the arguments.
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func (db DB) QueryContext(ctx context.Context, sql string, args ...interface{}) (*sql.Rows, error) {
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if err := utcCheckArgs(args); err != nil {
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return nil, err
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}
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return db.DB.QueryContext(ctx, sql, args...)
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}
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// QueryRowContext executes QueryRowContext after checking all of the arguments.
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func (db DB) QueryRowContext(ctx context.Context, sql string, args ...interface{}) *sql.Row {
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// TODO(jeff): figure out a way to return an errored *sql.Row so we can consider
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// enabling all of these checks in production.
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if err := utcCheckArgs(args); err != nil {
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panic(err)
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}
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return db.DB.QueryRowContext(ctx, sql, args...)
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}
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// Exec executes Exec after checking all of the arguments.
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func (db DB) Exec(sql string, args ...interface{}) (sql.Result, error) {
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if err := utcCheckArgs(args); err != nil {
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return nil, err
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}
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return db.DB.Exec(sql, args...)
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}
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// ExecContext executes ExecContext after checking all of the arguments.
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func (db DB) ExecContext(ctx context.Context, sql string, args ...interface{}) (sql.Result, error) {
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if err := utcCheckArgs(args); err != nil {
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return nil, err
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}
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return db.DB.ExecContext(ctx, sql, args...)
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}
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// utcCheckArgs checks the arguments for time.Time values that are not in the UTC location.
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func utcCheckArgs(args []interface{}) error {
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for n, arg := range args {
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var t time.Time
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var ok bool
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switch a := arg.(type) {
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case time.Time:
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t, ok = a, true
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case *time.Time:
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if a != nil {
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t, ok = *a, true
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}
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}
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if !ok {
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continue
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}
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if loc := t.Location(); loc != time.UTC {
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return errs.New("invalid timezone on argument %d: %v", n, loc)
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}
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}
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return nil
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}
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