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