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992d2dee45
- 后端新增 IRIS 连接、查询、DDL、索引元数据和 DataGrid 编辑能力 - 接入 optional driver-agent、构建标签、revision 生成和变更检测流程 - 前端新增 IRIS 连接入口、方言映射、能力配置和图标展示 - 修复 IRIS 主键识别、事务开启错误处理和驱动连接关闭问题 - 补充后端、前端和构建脚本相关回归测试 Refs #408
86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
package intersystems
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import (
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"context"
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"database/sql/driver"
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"errors"
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"strings"
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)
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// Connector represents a fixed configuration for the pq driver with a given
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// name. Connector satisfies the database/sql/driver Connector interface and
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// can be used to create any number of DB Conn's via the database/sql OpenDB
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// function.
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//
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// See https://golang.org/pkg/database/sql/driver/#Connector.
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// See https://golang.org/pkg/database/sql/#OpenDB.
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type Connector struct {
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opts values
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// dialer Dialer
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}
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// Connect returns a connection to the database using the fixed configuration
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// of this Connector. Context is not used.
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func (c *Connector) Connect(ctx context.Context) (driver.Conn, error) {
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return c.open(ctx)
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}
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// Driver returns the underlying driver of this Connector.
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func (c *Connector) Driver() driver.Driver {
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return &Driver{}
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}
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// NewConnector returns a connector for the pq driver in a fixed configuration
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// with the given dsn. The returned connector can be used to create any number
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// of equivalent Conn's. The returned connector is intended to be used with
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// database/sql.OpenDB.
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//
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// See https://golang.org/pkg/database/sql/driver/#Connector.
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// See https://golang.org/pkg/database/sql/#OpenDB.
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func NewConnector(dsn string) (*Connector, error) {
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var err error
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o := make(values)
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// A number of defaults are applied here, in this order:
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//
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// * Very low precedence defaults applied in every situation
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// * Environment variables
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// * Explicitly passed connection information
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o["host"] = "localhost"
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o["port"] = "1972"
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if strings.HasPrefix(dsn, "iris://") || strings.HasPrefix(dsn, "IRIS://") {
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dsn, err = ParseURL(dsn)
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if err != nil {
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return nil, err
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}
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}
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if err := parseOpts(dsn, o); err != nil {
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return nil, err
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}
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if enc, ok := o["client_encoding"]; ok && !isUTF8(enc) {
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return nil, errors.New("client_encoding must be absent or 'UTF8'")
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}
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o["client_encoding"] = "UTF8"
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return &Connector{opts: o, /*dialer: defaultDialer{}*/}, nil
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}
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// isUTF8 returns whether name is a fuzzy variation of the string "UTF-8".
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func isUTF8(name string) bool {
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s := strings.Map(alnumLowerASCII, name)
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return s == "utf8" || s == "unicode"
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}
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func alnumLowerASCII(ch rune) rune {
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if 'A' <= ch && ch <= 'Z' {
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return ch + ('a' - 'A')
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}
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if 'a' <= ch && ch <= 'z' || '0' <= ch && ch <= '9' {
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return ch
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}
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return -1 // discard
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}
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