You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
2.9 KiB
106 lines
2.9 KiB
package dsn
|
|
|
|
import (
|
|
"net/url"
|
|
"reflect"
|
|
"strings"
|
|
|
|
validator "gopkg.in/go-playground/validator.v9"
|
|
)
|
|
|
|
var _validator *validator.Validate
|
|
|
|
func init() {
|
|
_validator = validator.New()
|
|
}
|
|
|
|
// DSN a DSN represents a parsed DSN as same as url.URL.
|
|
type DSN struct {
|
|
*url.URL
|
|
}
|
|
|
|
// Bind dsn to specify struct and validate use use go-playground/validator format
|
|
//
|
|
// The bind of each struct field can be customized by the format string
|
|
// stored under the 'dsn' key in the struct field's tag. The format string
|
|
// gives the name of the field, possibly followed by a comma-separated
|
|
// list of options. The name may be empty in order to specify options
|
|
// without overriding the default field name.
|
|
//
|
|
// A two type data you can bind to struct
|
|
// built-in values, use below keys to bind built-in value
|
|
// username
|
|
// password
|
|
// address
|
|
// network
|
|
// the value in query string, use query.{name} to bind value in query string
|
|
//
|
|
// As a special case, if the field tag is "-", the field is always omitted.
|
|
// NOTE: that a field with name "-" can still be generated using the tag "-,".
|
|
//
|
|
// Examples of struct field tags and their meanings:
|
|
// // Field bind username
|
|
// Field string `dsn:"username"`
|
|
// // Field is ignored by this package.
|
|
// Field string `dsn:"-"`
|
|
// // Field bind value from query
|
|
// Field string `dsn:"query.name"`
|
|
//
|
|
func (d *DSN) Bind(v interface{}) (url.Values, error) {
|
|
assignFuncs := make(map[string]assignFunc)
|
|
if d.User != nil {
|
|
username := d.User.Username()
|
|
password, ok := d.User.Password()
|
|
if ok {
|
|
assignFuncs["password"] = stringsAssignFunc(password)
|
|
}
|
|
assignFuncs["username"] = stringsAssignFunc(username)
|
|
}
|
|
assignFuncs["address"] = addressesAssignFunc(d.Addresses())
|
|
assignFuncs["network"] = stringsAssignFunc(d.Scheme)
|
|
query, err := bindQuery(d.Query(), v, assignFuncs)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return query, _validator.Struct(v)
|
|
}
|
|
|
|
func addressesAssignFunc(addresses []string) assignFunc {
|
|
return func(v reflect.Value, to tagOpt) error {
|
|
if v.Kind() == reflect.String {
|
|
if addresses[0] == "" && to.Default != "" {
|
|
v.SetString(to.Default)
|
|
} else {
|
|
v.SetString(addresses[0])
|
|
}
|
|
return nil
|
|
}
|
|
if !(v.Kind() == reflect.Slice && v.Type().Elem().Kind() == reflect.String) {
|
|
return &BindTypeError{Value: strings.Join(addresses, ","), Type: v.Type()}
|
|
}
|
|
vals := reflect.MakeSlice(v.Type(), len(addresses), len(addresses))
|
|
for i, address := range addresses {
|
|
vals.Index(i).SetString(address)
|
|
}
|
|
if v.CanSet() {
|
|
v.Set(vals)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// Addresses parse host split by ','
|
|
// For Unix networks, return ['path']
|
|
func (d *DSN) Addresses() []string {
|
|
switch d.Scheme {
|
|
case "unix", "unixgram", "unixpacket":
|
|
return []string{d.Path}
|
|
}
|
|
return strings.Split(d.Host, ",")
|
|
}
|
|
|
|
// Parse parses rawdsn into a URL structure.
|
|
func Parse(rawdsn string) (*DSN, error) {
|
|
u, err := url.Parse(rawdsn)
|
|
return &DSN{URL: u}, err
|
|
}
|
|
|