86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
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// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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package mysql
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import (
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"errors"
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"strings"
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)
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// parseDSN parses the DSN string to a config
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func parseDSN(dsn string) (string, error) {
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//var user, passwd string
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var addr, net string
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// [user[:password]@][net[(addr)]]/dbname[?param1=value1¶mN=valueN]
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// Find the last '/' (since the password or the net addr might contain a '/')
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for i := len(dsn) - 1; i >= 0; i-- {
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if dsn[i] == '/' {
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var j, k int
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// left part is empty if i <= 0
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if i > 0 {
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// [username[:password]@][protocol[(address)]]
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// Find the last '@' in dsn[:i]
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for j = i; j >= 0; j-- {
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if dsn[j] == '@' {
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// username[:password]
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// Find the first ':' in dsn[:j]
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for k = 0; k < j; k++ {
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if dsn[k] == ':' {
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//passwd = dsn[k+1 : j]
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break
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}
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}
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//user = dsn[:k]
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break
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}
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}
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// [protocol[(address)]]
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// Find the first '(' in dsn[j+1:i]
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for k = j + 1; k < i; k++ {
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if dsn[k] == '(' {
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// dsn[i-1] must be == ')' if an address is specified
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if dsn[i-1] != ')' {
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if strings.ContainsRune(dsn[k+1:i], ')') {
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return "", errors.New("Invalid DSN unescaped")
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}
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return "", errors.New("Invalid DSN Addr")
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}
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addr = dsn[k+1 : i-1]
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break
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}
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}
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net = dsn[j+1 : k]
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}
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break
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}
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}
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// Set default network if empty
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if net == "" {
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net = "tcp"
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}
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// Set default address if empty
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if addr == "" {
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switch net {
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case "tcp":
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addr = "127.0.0.1:3306"
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case "unix":
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addr = "/tmp/mysql.sock"
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default:
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return "", errors.New("Default addr for network '" + net + "' unknown")
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}
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}
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return addr, nil
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}
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