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annotate cmd/sievemgr/internal/config/parser.go @ 19:854167f55839

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Fix SRV record lookup Do not use a configuration file default value for port in order to detect when it is not set by the user so that SRV record lookup is triggered. Depend on version 0.8.1 of go.guido-berhoerster.org/managesieve which contains an additional necessary fix.
author Guido Berhoerster <guido+sievemgr@berhoerster.name>
date Wed, 03 Feb 2021 13:34:44 +0100
parents 4dff4c3f0fbb
children
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5
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1 // Copyright (C) 2020 Guido Berhoerster <guido+sievemgr@berhoerster.name>
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2 //
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3 // Permission is hereby granted, free of charge, to any person obtaining
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4 // a copy of this software and associated documentation files (the
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5 // "Software"), to deal in the Software without restriction, including
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6 // without limitation the rights to use, copy, modify, merge, publish,
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7 // distribute, sublicense, and/or sell copies of the Software, and to
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8 // permit persons to whom the Software is furnished to do so, subject to
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9 // the following conditions:
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10 //
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11 // The above copyright notice and this permission notice shall be included
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12 // in all copies or substantial portions of the Software.
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13 //
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14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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17 // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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18 // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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19 // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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20 // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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21
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22 package config
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23
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24 import (
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25 "fmt"
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26 "strconv"
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27 )
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28
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29 type parser struct {
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30 s *scanner
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31 }
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32
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33 func (p *parser) scanType(expectedTok token) (string, error) {
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34 tok, lit, err := p.s.scan()
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35 if err != nil {
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36 return lit, NewParserError(err.Error(), p.s.line)
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37 } else if tok != expectedTok {
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38 return lit, NewParserError(fmt.Sprintf("expected %s, got %s %q", expectedTok, tok, lit), p.s.line)
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39 }
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40 return lit, nil
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41 }
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42
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43 func (p *parser) validateAccount(acct *Account) error {
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44 if acct.Host == "" {
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45 return NewParserError(fmt.Sprintf("no host specified for account %q",
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46 acct.Name), 0)
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47 } else if acct.User == "" {
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48 return NewParserError(fmt.Sprintf("no user specified for account %q",
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49 acct.Name), 0)
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50 }
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51 return nil
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52 }
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53
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54 func (p *parser) parse(conf *Configuration) error {
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55 var acct *Account
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56 var isDefault bool
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57 var tok token
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58 var lit string
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59 var err error
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60 parsing:
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61 for {
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62 tok, lit, err = p.s.scan()
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63 if err != nil {
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64 err = NewParserError(err.Error(), p.s.line)
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65 break parsing
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66 }
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67 if tok == tokenIllegal {
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68 err = NewParserError(fmt.Sprintf("illegal token %q", lit), p.s.line)
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69 break parsing
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70 } else if tok == tokenEOF {
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71 break parsing
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72 } else if tok != tokenIdent {
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73 err = NewParserError(fmt.Sprintf("expected identifier, got %s %q", tok, lit), p.s.line)
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74 break parsing
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75 }
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76 switch lit {
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77 case "account":
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78 if acct != nil {
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79 if err = p.validateAccount(acct); err != nil {
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80 break parsing
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81 }
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82 conf.Accounts = append(conf.Accounts, acct)
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83 if isDefault {
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84 conf.Default = acct
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85 isDefault = false
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86 }
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87 }
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88
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89 // account name
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90 if lit, err = p.scanType(tokenString); err != nil {
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91 break parsing
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92 }
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93 acct = &Account{
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94 Name: lit,
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95 }
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96 case "default":
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97 isDefault = true
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98 case "host":
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99 if lit, err = p.scanType(tokenString); err != nil {
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100 break parsing
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101 }
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102 acct.Host = lit
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103 case "port":
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104 if lit, err = p.scanType(tokenNumber); err != nil {
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105 break parsing
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106 }
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107 var port int
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108 if port, err = strconv.Atoi(lit); err != nil {
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109 err = NewParserError(fmt.Sprintf("failed to parse port: %s", err), p.s.line)
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110 break parsing
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111 } else if port < 1 || port > 65535 {
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112 err = NewParserError(fmt.Sprintf("invalid port number %d", port), p.s.line)
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113 break parsing
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114 }
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115 acct.Port = lit
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116 case "user":
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117 if lit, err = p.scanType(tokenString); err != nil {
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118 break parsing
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119 }
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120 acct.User = lit
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121 case "pass":
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122 if lit, err = p.scanType(tokenString); err != nil {
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123 break parsing
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124 }
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125 acct.Password = lit
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126 case "insecure":
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127 acct.Insecure = true
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128 default:
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129 err = NewParserError(fmt.Sprintf("unknown %s: %q", tok, lit), p.s.line)
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130 break parsing
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131 }
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132 }
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133 if err != nil {
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134 return err
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135 }
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136 if acct != nil {
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137 if err = p.validateAccount(acct); err != nil {
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138 return err
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139 }
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140 conf.Accounts = append(conf.Accounts, acct)
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141 if isDefault {
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142 conf.Default = acct
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143 }
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144 }
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145
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146 return nil
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147 }