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connection.go
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connection.go
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// Copyright (c) 2012-present The upper.io/db authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package ql
import (
"fmt"
"net/url"
"path/filepath"
"strings"
)
const defaultConnectionScheme = `file`
// ConnectionURL implements a QL connection struct.
type ConnectionURL struct {
Scheme string
Database string
Options map[string]string
}
func (c ConnectionURL) String() (s string) {
vv := url.Values{}
if c.Database == "" {
return ""
}
// Does the database have an existing name?
if !strings.HasPrefix(c.Database, "/") {
c.Database, _ = filepath.Abs(c.Database)
}
// Do we have any options?
if c.Options == nil {
c.Options = map[string]string{}
}
// Converting options into URL values.
for k, v := range c.Options {
vv.Set(k, v)
}
// Building URL.
u := url.URL{
Scheme: c.Scheme,
Path: c.Database,
RawQuery: vv.Encode(),
}
if u.Scheme == "" {
u.Scheme = defaultConnectionScheme
}
return u.String()
}
// ParseURL parses s into a ConnectionURL struct.
func ParseURL(s string) (conn ConnectionURL, err error) {
var u *url.URL
if u, err = url.Parse(s); err != nil {
return conn, err
}
if u.Scheme != "file" && u.Scheme != "memory" && u.Scheme != "" {
return conn, fmt.Errorf(`Expecting file:// or memory:// connection scheme.`)
}
var vv url.Values
if vv, err = url.ParseQuery(u.RawQuery); err != nil {
return conn, err
}
conn.Scheme = u.Scheme
conn.Database = u.Host + u.Path
conn.Options = map[string]string{}
for k := range vv {
conn.Options[k] = vv.Get(k)
}
return conn, err
}