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dex/storage/sql/config.go

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package sql
import (
"database/sql"
"fmt"
"net/url"
"strconv"
"github.com/Sirupsen/logrus"
"github.com/coreos/dex/storage"
"github.com/lib/pq"
sqlite3 "github.com/mattn/go-sqlite3"
)
const (
// postgres error codes
pgErrUniqueViolation = "23505" // unique_violation
)
// SQLite3 options for creating an SQL db.
type SQLite3 struct {
// File to
File string `json:"file"`
}
// Open creates a new storage implementation backed by SQLite3
func (s *SQLite3) Open(logger logrus.FieldLogger) (storage.Storage, error) {
conn, err := s.open(logger)
if err != nil {
return nil, err
}
return conn, nil
}
func (s *SQLite3) open(logger logrus.FieldLogger) (*conn, error) {
db, err := sql.Open("sqlite3", s.File)
if err != nil {
return nil, err
}
if s.File == ":memory:" {
// sqlite3 uses file locks to coordinate concurrent access. In memory
// doesn't support this, so limit the number of connections to 1.
db.SetMaxOpenConns(1)
}
errCheck := func(err error) bool {
sqlErr, ok := err.(sqlite3.Error)
if !ok {
return false
}
return sqlErr.ExtendedCode == sqlite3.ErrConstraintPrimaryKey
}
c := &conn{db, flavorSQLite3, logger, errCheck}
if _, err := c.migrate(); err != nil {
return nil, fmt.Errorf("failed to perform migrations: %v", err)
}
return c, nil
}
const (
sslDisable = "disable"
sslRequire = "require"
sslVerifyCA = "verify-ca"
sslVerifyFull = "verify-full"
)
// PostgresSSL represents SSL options for Postgres databases.
type PostgresSSL struct {
Mode string
CAFile string
// Files for client auth.
KeyFile string
CertFile string
}
// Postgres options for creating an SQL db.
type Postgres struct {
Database string
User string
Password string
Host string
SSL PostgresSSL `json:"ssl" yaml:"ssl"`
ConnectionTimeout int // Seconds
}
// Open creates a new storage implementation backed by Postgres.
func (p *Postgres) Open(logger logrus.FieldLogger) (storage.Storage, error) {
conn, err := p.open(logger)
if err != nil {
return nil, err
}
return conn, nil
}
func (p *Postgres) open(logger logrus.FieldLogger) (*conn, error) {
v := url.Values{}
set := func(key, val string) {
if val != "" {
v.Set(key, val)
}
}
set("connect_timeout", strconv.Itoa(p.ConnectionTimeout))
set("sslkey", p.SSL.KeyFile)
set("sslcert", p.SSL.CertFile)
set("sslrootcert", p.SSL.CAFile)
if p.SSL.Mode == "" {
// Assume the strictest mode if unspecified.
p.SSL.Mode = sslVerifyFull
}
set("sslmode", p.SSL.Mode)
u := url.URL{
Scheme: "postgres",
Host: p.Host,
Path: "/" + p.Database,
RawQuery: v.Encode(),
}
if p.User != "" {
if p.Password != "" {
u.User = url.UserPassword(p.User, p.Password)
} else {
u.User = url.User(p.User)
}
}
db, err := sql.Open("postgres", u.String())
if err != nil {
return nil, err
}
errCheck := func(err error) bool {
sqlErr, ok := err.(*pq.Error)
if !ok {
return false
}
return sqlErr.Code == pgErrUniqueViolation
}
c := &conn{db, flavorPostgres, logger, errCheck}
if _, err := c.migrate(); err != nil {
return nil, fmt.Errorf("failed to perform migrations: %v", err)
}
return c, nil
}