mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-22 08:42:32 -05:00
110 lines
3.3 KiB
Go
110 lines
3.3 KiB
Go
package pq
|
|
|
|
import (
|
|
"context"
|
|
"database/sql/driver"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
// Connector represents a fixed configuration for the pq driver with a given
|
|
// name. Connector satisfies the database/sql/driver Connector interface and
|
|
// can be used to create any number of DB Conn's via the database/sql OpenDB
|
|
// function.
|
|
//
|
|
// See https://golang.org/pkg/database/sql/driver/#Connector.
|
|
// See https://golang.org/pkg/database/sql/#OpenDB.
|
|
type Connector struct {
|
|
opts values
|
|
dialer Dialer
|
|
}
|
|
|
|
// Connect returns a connection to the database using the fixed configuration
|
|
// of this Connector. Context is not used.
|
|
func (c *Connector) Connect(ctx context.Context) (driver.Conn, error) {
|
|
return c.open(ctx)
|
|
}
|
|
|
|
// Driver returnst the underlying driver of this Connector.
|
|
func (c *Connector) Driver() driver.Driver {
|
|
return &Driver{}
|
|
}
|
|
|
|
// NewConnector returns a connector for the pq driver in a fixed configuration
|
|
// with the given dsn. The returned connector can be used to create any number
|
|
// of equivalent Conn's. The returned connector is intended to be used with
|
|
// database/sql.OpenDB.
|
|
//
|
|
// See https://golang.org/pkg/database/sql/driver/#Connector.
|
|
// See https://golang.org/pkg/database/sql/#OpenDB.
|
|
func NewConnector(dsn string) (*Connector, error) {
|
|
var err error
|
|
o := make(values)
|
|
|
|
// A number of defaults are applied here, in this order:
|
|
//
|
|
// * Very low precedence defaults applied in every situation
|
|
// * Environment variables
|
|
// * Explicitly passed connection information
|
|
o["host"] = "localhost"
|
|
o["port"] = "5432"
|
|
// N.B.: Extra float digits should be set to 3, but that breaks
|
|
// Postgres 8.4 and older, where the max is 2.
|
|
o["extra_float_digits"] = "2"
|
|
for k, v := range parseEnviron(os.Environ()) {
|
|
o[k] = v
|
|
}
|
|
|
|
if strings.HasPrefix(dsn, "postgres://") || strings.HasPrefix(dsn, "postgresql://") {
|
|
dsn, err = ParseURL(dsn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if err := parseOpts(dsn, o); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Use the "fallback" application name if necessary
|
|
if fallback, ok := o["fallback_application_name"]; ok {
|
|
if _, ok := o["application_name"]; !ok {
|
|
o["application_name"] = fallback
|
|
}
|
|
}
|
|
|
|
// We can't work with any client_encoding other than UTF-8 currently.
|
|
// However, we have historically allowed the user to set it to UTF-8
|
|
// explicitly, and there's no reason to break such programs, so allow that.
|
|
// Note that the "options" setting could also set client_encoding, but
|
|
// parsing its value is not worth it. Instead, we always explicitly send
|
|
// client_encoding as a separate run-time parameter, which should override
|
|
// anything set in options.
|
|
if enc, ok := o["client_encoding"]; ok && !isUTF8(enc) {
|
|
return nil, errors.New("client_encoding must be absent or 'UTF8'")
|
|
}
|
|
o["client_encoding"] = "UTF8"
|
|
// DateStyle needs a similar treatment.
|
|
if datestyle, ok := o["datestyle"]; ok {
|
|
if datestyle != "ISO, MDY" {
|
|
return nil, fmt.Errorf("setting datestyle must be absent or %v; got %v", "ISO, MDY", datestyle)
|
|
}
|
|
} else {
|
|
o["datestyle"] = "ISO, MDY"
|
|
}
|
|
|
|
// If a user is not provided by any other means, the last
|
|
// resort is to use the current operating system provided user
|
|
// name.
|
|
if _, ok := o["user"]; !ok {
|
|
u, err := userCurrent()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
o["user"] = u
|
|
}
|
|
|
|
return &Connector{opts: o, dialer: defaultDialer{}}, nil
|
|
}
|