annotate pkg/soap/validate.go @ 5415:4ad68ab239b7 marking-single-beam

Factored creation of default class breaks in SR import to be reused with markings, too.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 07 Jul 2021 12:01:28 +0200
parents bd09d6ad4c14
children 31973f6f5cca
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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 "io/ioutil"
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22 "os"
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23 "os/exec"
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24 "path/filepath"
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25 "strings"
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26
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27 "golang.org/x/net/html/charset"
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28
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29 "gemma.intevation.de/gemma/pkg/config"
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30 )
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31
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32 const linter = "xmllint"
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33
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34 type (
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35 ValidationError string
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36 foundError string
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37 )
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38
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39 func (ef foundError) Error() string {
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40 return string(ef)
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41 }
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42
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43 func (ve ValidationError) Error() string {
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44 return string(ve)
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45 }
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46
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47 func FindSchema(name string) (string, error) {
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48 name = strings.ToLower(name)
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49 config.WaitReady()
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50 for _, root := range filepath.SplitList(config.SchemaDirs()) {
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51 err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
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52 if err != nil {
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53 return err
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54 }
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55 if info == nil {
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56 return nil
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57 }
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58 if info.Mode().IsRegular() && strings.ToLower(info.Name()) == name {
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59 return foundError(path)
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60 }
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61 return nil
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62 })
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63 if path, ok := err.(foundError); ok {
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64 return string(path), nil
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65 }
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66 if err != nil {
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67 return "", err
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68 }
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69 }
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70 return "", nil
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71 }
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72
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73 func ValidateFile(fname, schema string, dst interface{}) error {
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74 f, err := os.Open(fname)
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75 if err != nil {
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76 return err
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77 }
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78 defer f.Close()
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79 return Validate(f, schema, dst)
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80 }
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81
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82 func Validate(r io.Reader, schema string, dst interface{}) error {
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83 schemaPath, err := FindSchema(schema)
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84 if err != nil {
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85 return err
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86 }
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87 if schemaPath == "" {
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88 return fmt.Errorf("no schema file '%s' found", schema)
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89 }
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90 linterPath, err := exec.LookPath(linter)
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91 if err != nil {
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92 return err
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93 }
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94
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95 type envelope struct {
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96 _ xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
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97 Body *struct {
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98 Inner []byte `xml:",innerxml"`
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99 } `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
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100 }
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101
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102 content, err := ioutil.ReadAll(r)
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103 if err != nil {
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104 return err
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105 }
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106
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107 dec := xml.NewDecoder(bytes.NewReader(content))
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108 dec.CharsetReader = charset.NewReaderLabel
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109
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110 var env envelope
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111 if err := dec.Decode(&env); err != nil {
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112 return err
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113 }
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114
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115 // It has a body -> throw envelope away.
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116 if env.Body != nil && len(env.Body.Inner) > 0 {
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117 content = env.Body.Inner
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118 }
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119
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120 cmd := exec.Command(
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121 linterPath,
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122 "--schema", schemaPath,
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123 "--noout",
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124 "-")
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125
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126 var stderr bytes.Buffer
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127
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128 cmd.Stdin = bytes.NewReader(content)
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129 cmd.Stderr = &stderr
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130 cmd.Stdout = ioutil.Discard
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131
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132 if err := cmd.Start(); err != nil {
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133 return err
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134 }
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135
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136 if err := cmd.Wait(); err != nil {
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137 if err2, ok := err.(*exec.ExitError); ok {
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138 if !err2.Success() {
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139 return ValidationError(stderr.String())
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140 }
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141 }
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142 return err
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143 }
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144
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145 // Validation successful -> Deserialize.
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146
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147 dec = xml.NewDecoder(bytes.NewReader(content))
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148 dec.CharsetReader = charset.NewReaderLabel
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149
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150 return dec.Decode(dst)
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151 }