117 lines
3.5 KiB
Go
117 lines
3.5 KiB
Go
/*
|
|
Copyright 2026.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
// Package postgresql 使用 pgxpool 提供 PostgreSQL 能力的薄适配。
|
|
package postgresql
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"errors"
|
|
"net"
|
|
"net/url"
|
|
"strconv"
|
|
|
|
"github.com/jackc/pgx/v5/pgconn"
|
|
"github.com/jackc/pgx/v5/pgxpool"
|
|
|
|
"git.ddupan.top/panxiao81/ayatori/internal/database/application"
|
|
"git.ddupan.top/panxiao81/ayatori/internal/database/domain/instance"
|
|
)
|
|
|
|
// Connector 不读取 Secret、不决定连接何时替换；池本身由 pgxpool 实现。
|
|
type Connector struct {
|
|
RootCert string
|
|
}
|
|
|
|
type database struct {
|
|
pool *pgxpool.Pool
|
|
}
|
|
|
|
func (*database) String() string { return "[redacted PostgreSQL database]" }
|
|
func (d *database) GoString() string { return d.String() }
|
|
func (d *database) Close() {
|
|
d.pool.Close()
|
|
}
|
|
|
|
func (d *database) Version(ctx context.Context) (string, error) {
|
|
var version string
|
|
if err := d.pool.QueryRow(ctx, "SHOW server_version").Scan(&version); err != nil {
|
|
return "", safeError(err, application.ErrObservation)
|
|
}
|
|
return version, nil
|
|
}
|
|
|
|
func (c Connector) Connect(ctx context.Context, endpoint instance.Endpoint, credentials application.Credentials) (application.Database, error) {
|
|
if err := endpoint.Validate(); err != nil {
|
|
return nil, err
|
|
}
|
|
if credentials.Username() == "" || credentials.Password() == "" {
|
|
return nil, application.ErrCredentialsInvalid
|
|
}
|
|
endpointValues := endpoint.Values()
|
|
query := url.Values{
|
|
"sslmode": {string(endpointValues.TLSMode)},
|
|
"connect_timeout": {"5"},
|
|
"application_name": {"ayatori-database-management"},
|
|
}
|
|
if c.RootCert != "" {
|
|
query.Set("sslrootcert", c.RootCert)
|
|
}
|
|
connectionURL := url.URL{
|
|
Scheme: "postgresql",
|
|
Host: net.JoinHostPort(endpointValues.Host, strconv.Itoa(endpointValues.Port)),
|
|
Path: "/" + endpointValues.ManagementDatabase,
|
|
User: url.UserPassword(credentials.Username(), credentials.Password()),
|
|
RawQuery: query.Encode(),
|
|
}
|
|
config, err := pgxpool.ParseConfig(connectionURL.String())
|
|
if err != nil {
|
|
return nil, application.ErrConnection
|
|
}
|
|
// pgx 不实现 libpq hostaddr；复用其 LookupFunc 扩展点，TLS 验证身份仍采用 host。
|
|
config.ConnConfig.LookupFunc = func(context.Context, string) ([]string, error) {
|
|
return []string{endpointValues.HostAddr}, nil
|
|
}
|
|
config.ConnConfig.Fallbacks = nil
|
|
pool, err := pgxpool.NewWithConfig(ctx, config)
|
|
if err != nil {
|
|
return nil, safeError(err, application.ErrConnection)
|
|
}
|
|
if err := pool.Ping(ctx); err != nil {
|
|
pool.Close()
|
|
return nil, safeError(err, application.ErrConnection)
|
|
}
|
|
return &database{pool: pool}, nil
|
|
}
|
|
|
|
func safeError(err, fallback error) error {
|
|
if errors.Is(err, context.Canceled) {
|
|
return context.Canceled
|
|
}
|
|
if errors.Is(err, context.DeadlineExceeded) {
|
|
return context.DeadlineExceeded
|
|
}
|
|
var pgerr *pgconn.PgError
|
|
if errors.As(err, &pgerr) && (pgerr.Code == "28P01" || pgerr.Code == "28000") {
|
|
return application.ErrAuthentication
|
|
}
|
|
if _, ok := errors.AsType[*tls.CertificateVerificationError](err); ok {
|
|
return application.ErrAuthentication
|
|
}
|
|
return fallback
|
|
}
|