gitea/vendor/github.com/go-xorm/xorm/pq_driver.go
2016-11-04 08:43:11 +01:00

120 lines
2.3 KiB
Go

// Copyright 2015 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package xorm
import (
"errors"
"fmt"
"net/url"
"sort"
"strings"
"github.com/go-xorm/core"
)
type pqDriver struct {
}
type values map[string]string
func (vs values) Set(k, v string) {
vs[k] = v
}
func (vs values) Get(k string) (v string) {
return vs[k]
}
func errorf(s string, args ...interface{}) {
panic(fmt.Errorf("pq: %s", fmt.Sprintf(s, args...)))
}
func parseURL(connstr string) (string, error) {
u, err := url.Parse(connstr)
if err != nil {
return "", err
}
if u.Scheme != "postgresql" && u.Scheme != "postgres" {
return "", fmt.Errorf("invalid connection protocol: %s", u.Scheme)
}
var kvs []string
escaper := strings.NewReplacer(` `, `\ `, `'`, `\'`, `\`, `\\`)
accrue := func(k, v string) {
if v != "" {
kvs = append(kvs, k+"="+escaper.Replace(v))
}
}
if u.User != nil {
v := u.User.Username()
accrue("user", v)
v, _ = u.User.Password()
accrue("password", v)
}
i := strings.Index(u.Host, ":")
if i < 0 {
accrue("host", u.Host)
} else {
accrue("host", u.Host[:i])
accrue("port", u.Host[i+1:])
}
if u.Path != "" {
accrue("dbname", u.Path[1:])
}
q := u.Query()
for k := range q {
accrue(k, q.Get(k))
}
sort.Strings(kvs) // Makes testing easier (not a performance concern)
return strings.Join(kvs, " "), nil
}
func parseOpts(name string, o values) {
if len(name) == 0 {
return
}
name = strings.TrimSpace(name)
ps := strings.Split(name, " ")
for _, p := range ps {
kv := strings.Split(p, "=")
if len(kv) < 2 {
errorf("invalid option: %q", p)
}
o.Set(kv[0], kv[1])
}
}
func (p *pqDriver) Parse(driverName, dataSourceName string) (*core.Uri, error) {
db := &core.Uri{DbType: core.POSTGRES}
o := make(values)
var err error
if strings.HasPrefix(dataSourceName, "postgresql://") || strings.HasPrefix(dataSourceName, "postgres://") {
dataSourceName, err = parseURL(dataSourceName)
if err != nil {
return nil, err
}
}
parseOpts(dataSourceName, o)
db.DbName = o.Get("dbname")
if db.DbName == "" {
return nil, errors.New("dbname is empty")
}
/*db.Schema = o.Get("schema")
if len(db.Schema) == 0 {
db.Schema = "public"
}*/
return db, nil
}