Mercurial > gemma

annotate pkg/soap/validate.go @ 5710:37c8feeecb4d

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Merged branch sr-v2 into default.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 20 Feb 2024 21:28:56 +0100
parents 31973f6f5cca
children 6270951dda28
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package soap
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15
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16 import (
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17 "bytes"
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18 "encoding/xml"
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19 "fmt"
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20 "io"
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21 "os"
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22 "os/exec"
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23 "path/filepath"
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24 "strings"
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25
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26 "golang.org/x/net/html/charset"
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27
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28 "gemma.intevation.de/gemma/pkg/config"
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29 )
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30
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31 const linter = "xmllint"
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32
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33 type (
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34 ValidationError string
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35 foundError string
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36 )
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37
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38 func (ef foundError) Error() string {
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39 return string(ef)
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40 }
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41
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42 func (ve ValidationError) Error() string {
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43 return string(ve)
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44 }
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45
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46 func FindSchema(name string) (string, error) {
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47 name = strings.ToLower(name)
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48 config.WaitReady()
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49 for _, root := range filepath.SplitList(config.SchemaDirs()) {
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50 err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
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51 if err != nil {
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52 return err
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53 }
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54 if info == nil {
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55 return nil
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56 }
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57 if info.Mode().IsRegular() && strings.ToLower(info.Name()) == name {
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58 return foundError(path)
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59 }
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60 return nil
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61 })
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62 if path, ok := err.(foundError); ok {
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63 return string(path), nil
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64 }
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65 if err != nil {
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66 return "", err
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67 }
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68 }
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69 return "", nil
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70 }
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71
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72 func ValidateFile(fname, schema string, dst interface{}) error {
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73 f, err := os.Open(fname)
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74 if err != nil {
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75 return err
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76 }
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77 defer f.Close()
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78 return Validate(f, schema, dst)
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79 }
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80
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81 func Validate(r io.Reader, schema string, dst interface{}) error {
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82 schemaPath, err := FindSchema(schema)
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83 if err != nil {
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84 return err
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85 }
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86 if schemaPath == "" {
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87 return fmt.Errorf("no schema file '%s' found", schema)
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88 }
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89 linterPath, err := exec.LookPath(linter)
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90 if err != nil {
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91 return err
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92 }
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93
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94 type envelope struct {
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95 _ xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
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96 Body *struct {
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97 Inner []byte `xml:",innerxml"`
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98 } `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
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99 }
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100
5683
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101 content, err := io.ReadAll(r)
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102 if err != nil {
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103 return err
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104 }
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105
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106 dec := xml.NewDecoder(bytes.NewReader(content))
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107 dec.CharsetReader = charset.NewReaderLabel
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108
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109 var env envelope
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110 if err := dec.Decode(&env); err != nil {
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111 return err
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112 }
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113
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114 // It has a body -> throw envelope away.
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115 if env.Body != nil && len(env.Body.Inner) > 0 {
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116 content = env.Body.Inner
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117 }
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118
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119 cmd := exec.Command(
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120 linterPath,
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121 "--schema", schemaPath,
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122 "--noout",
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123 "-")
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124
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125 var stderr bytes.Buffer
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126
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127 cmd.Stdin = bytes.NewReader(content)
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128 cmd.Stderr = &stderr
5683
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129 cmd.Stdout = io.Discard
2181
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130
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131 if err := cmd.Start(); err != nil {
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132 return err
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133 }
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134
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135 if err := cmd.Wait(); err != nil {
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136 if err2, ok := err.(*exec.ExitError); ok {
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137 if !err2.Success() {
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138 return ValidationError(stderr.String())
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139 }
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140 }
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141 return err
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142 }
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143
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144 // Validation successful -> Deserialize.
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145
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146 dec = xml.NewDecoder(bytes.NewReader(content))
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147 dec.CharsetReader = charset.NewReaderLabel
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148
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149 return dec.Decode(dst)
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150 }