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annotate pkg/wfs/download.go @ 2567:1cac2e58ef7d

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streches: tolerance added
author Thomas Junk <thomas.junk@intevation.de>
date Mon, 11 Mar 2019 12:02:47 +0100
parents 8a6ed058af22
children a8ebc785823d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 // This is Free Software under GNU Affero General Public License v >= 3.0.Reader.
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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 wfs
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15
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16 import (
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17 "bufio"
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18 "bytes"
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19 "encoding/xml"
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20 "errors"
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21 "fmt"
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22 "io"
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23 "log"
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24 "net/http"
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25 "net/url"
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26 "strconv"
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27 "strings"
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28
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29 "gemma.intevation.de/gemma/pkg/config"
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30 "golang.org/x/net/html/charset"
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31 )
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32
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33 var (
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34 // ErrNoSuchFeatureType is returned when a feature is not supported.
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35 ErrNoSuchFeatureType = errors.New("No such feature type")
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36 // ErrGetFeatureNotSupported is returned when GetFeature is not supported.
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37 ErrGetFeatureNotSupported = errors.New("GetFeature not supported")
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38 // ErrMethodGetNotSupported is returned when the GET is not supported.
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39 ErrMethodGetNotSupported = errors.New("GET not supported")
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40 // ErrNoNumberMatchedFound is returned if feature count cannot be extracted.
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41 ErrNoNumberMatchedFound = errors.New("No numberMatched attribute found")
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42 // ErrOutputFormatNotSupported is returned if a output format is
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43 // not supported.
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44 ErrOutputFormatNotSupported = errors.New("Output format not supported")
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45 )
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46
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47 // GetCapabilities downloads a capabilities document for a given URL.
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48 func GetCapabilities(capURL string) (*Capabilities, error) {
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49
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50 base, err := url.Parse(capURL)
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51 if err != nil {
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52 return nil, err
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53 }
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54 v := url.Values{}
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55 v.Set("SERVICE", "WFS")
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56 v.Set("REQUEST", "GetCapabilities")
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57 v.Set("ACCEPTVERSIONS", "2.0.0,1.1.0,1.0.0")
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58 base.RawQuery = v.Encode()
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59
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60 baseURL := base.String()
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61 resp, err := http.Get(baseURL)
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62 if err != nil {
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63 return nil, err
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64 }
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65 defer resp.Body.Close()
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66 caps, err := ParseCapabilities(bufio.NewReader(resp.Body))
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67 if err == nil {
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68 caps.BaseURL = baseURL
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69 }
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70 return caps, err
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71 }
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72
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73 func numberFeaturesGET(u *url.URL, featureType, version string) (int, error) {
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74
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75 v := url.Values{}
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76 v.Set("SERVICE", "WFS")
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77 v.Set("REQUEST", "GetFeature")
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78 v.Set("resultType", "hits")
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79 v.Set("VERSION", version)
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80 v.Set("TYPENAMES", featureType)
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81
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82 q := *u
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83 q.RawQuery = v.Encode()
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84
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85 resp, err := http.Get(q.String())
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86 if err != nil {
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87 return 0, err
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88 }
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89 defer resp.Body.Close()
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90 dec := xml.NewDecoder(resp.Body)
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91 dec.CharsetReader = charset.NewReaderLabel
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92
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93 var result struct {
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94 NumberMatched *int `xml:"numberMatched,attr"`
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95 }
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96
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97 if err := dec.Decode(&result); err != nil {
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98 return 0, err
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99 }
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100
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101 if result.NumberMatched == nil {
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102 return 0, ErrNoNumberMatchedFound
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103 }
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104
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105 return *result.NumberMatched, nil
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106 }
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107
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108 // GetFeaturesGET constructs a list of URLs to get features
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109 // for a given feature type from a WFS servers.
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110 func GetFeaturesGET(
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111 caps *Capabilities,
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112 featureTypeName,
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113 outputFormat string,
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114 sortBy string,
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115 ) ([]string, error) {
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116
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117 feature := caps.FindFeatureType(featureTypeName)
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118 if feature == nil {
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119 return nil, ErrNoSuchFeatureType
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120 }
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121 op := caps.FindOperation("GetFeature")
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122 if op == nil {
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123 return nil, ErrGetFeatureNotSupported
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124 }
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125
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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126 if op.DCP.HTTP.Get == nil {
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127 return nil, ErrMethodGetNotSupported
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128 }
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129
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130 getRaw := op.DCP.HTTP.Get.HRef
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131 getU, err := url.Parse(getRaw)
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132 if err != nil {
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133 return nil, err
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134 }
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135 // The URL could be relative so resolve against Capabilities URL.
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136 if !getU.IsAbs() {
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137 base, err := url.Parse(caps.BaseURL)
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138 if err != nil {
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139 return nil, err
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140 }
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141 getU = getU.ResolveReference(base)
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142 }
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143
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144 if !op.SupportsOutputFormat(outputFormat) {
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145 return nil, ErrOutputFormatNotSupported
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146 }
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147
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148 wfsVersion := caps.HighestWFSVersion(WFS200)
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149
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diff changeset
150 featuresPerPage, supportsPaging := op.FeaturesPerPage()
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151
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152 var numFeatures int
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153
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diff changeset
154 if supportsPaging {
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diff changeset
155 log.Printf("info: Paging supported with %d feature per page.\n",
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156 featuresPerPage)
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157
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diff changeset
158 if !op.SupportsHits() {
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159 supportsPaging = false
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160 } else {
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diff changeset
161 numFeatures, err = numberFeaturesGET(getU, featureTypeName, wfsVersion)
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diff changeset
162 if err != nil {
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diff changeset
163 log.Printf("error: %v\n", err)
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164 supportsPaging = false
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165 } else {
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diff changeset
166 log.Printf("info: Number of features: %d\n", numFeatures)
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167 }
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168 }
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169 }
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170
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diff changeset
171 var downloadURLs []string
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172 wfs2 := !versionIsLess(wfsVersion, WFS200)
1614
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173
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174 addNS := func(v url.Values) {
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175 if len(feature.Namespaces) == 0 {
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176 return
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177 }
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178 // Only use first namespace
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179 ns := feature.Namespaces[0]
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180 if wfs2 {
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181 v.Set("NAMESPACES", fmt.Sprintf("(%s,%s)", ns.Space, ns.Local))
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182 } else {
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183 v.Set("NAMESPACE", fmt.Sprintf("(%s:%s)", ns.Space, ns.Local))
efc409e330a6 WFS downloader: Propagate namespaces of feature type into GetFeature request.
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184 }
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diff changeset
185 }
1608
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186
1616
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187 addOutputFormat := func(v url.Values) {
f59550310143 WFS downloader: Support different feature output formats.
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188 if outputFormat != "" {
f59550310143 WFS downloader: Support different feature output formats.
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189 v.Set("outputFormat", outputFormat)
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190 }
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191 }
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192
1619
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diff changeset
193 addSortBy := func(v url.Values) {
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diff changeset
194 if sortBy != "" {
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diff changeset
195 v.Set("sortBy", sortBy)
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196 }
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197 }
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diff changeset
198
1608
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199 if supportsPaging {
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diff changeset
200 pagedURL := func(ofs, count int) string {
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diff changeset
201 v := url.Values{}
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diff changeset
202 v.Set("SERVICE", "WFS")
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diff changeset
203 v.Set("REQUEST", "GetFeature")
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diff changeset
204 v.Set("VERSION", wfsVersion)
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diff changeset
205 v.Set("startIndex", strconv.Itoa(ofs))
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diff changeset
206 if wfs2 {
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diff changeset
207 v.Set("count", strconv.Itoa(count))
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parents:
diff changeset
208 } else {
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diff changeset
209 v.Set("maxFeatures", strconv.Itoa(count))
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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parents:
diff changeset
210 }
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parents:
diff changeset
211 v.Set("TYPENAMES", featureTypeName)
1614
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diff changeset
212 addNS(v)
1616
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diff changeset
213 addOutputFormat(v)
1619
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diff changeset
214 addSortBy(v)
1608
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parents:
diff changeset
215 q := *getU
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parents:
diff changeset
216 q.RawQuery = v.Encode()
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
217 return q.String()
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parents:
diff changeset
218 }
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
219 if numFeatures <= featuresPerPage {
2096
8b7dee291488 WFS downloader: Harmonized logging.
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parents: 1935
diff changeset
220 log.Println("info: All features can be fetched in one page.")
1608
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
221 downloadURLs = []string{pagedURL(0, numFeatures)}
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
222 } else {
2096
8b7dee291488 WFS downloader: Harmonized logging.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1935
diff changeset
223 log.Println("info: Features need to be downloaded in pages.")
1608
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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parents:
diff changeset
224 for pos := 0; pos < numFeatures; {
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
225 var count int
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
226 if rest := numFeatures - pos; rest >= numFeatures {
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 count = numFeatures
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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parents:
diff changeset
228 } else {
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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diff changeset
229 count = rest
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230 }
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231 downloadURLs = append(downloadURLs, pagedURL(pos, count))
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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diff changeset
232 pos += count
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233 }
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234 }
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235 } else { // No paging support.
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236 v := url.Values{}
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237 v.Set("SERVICE", "WFS")
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238 v.Set("REQUEST", "GetFeature")
427f9010b4a9 WFS download: Started with GET downloader (paged and unpaged).
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diff changeset
239 v.Set("VERSION", wfsVersion)
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240 v.Set("TYPENAMES", featureTypeName)
1614
efc409e330a6 WFS downloader: Propagate namespaces of feature type into GetFeature request.
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diff changeset
241 addNS(v)
1616
f59550310143 WFS downloader: Support different feature output formats.
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diff changeset
242 addOutputFormat(v)
1619
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diff changeset
243 addSortBy(v)
1608
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244 q := *getU
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245 q.RawQuery = v.Encode()
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246 downloadURLs = []string{q.String()}
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247 }
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248
1619
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249 return downloadURLs, nil
1608
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250 }
1624
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251
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2b72f5e005aa WFS imports: Write get GetFeature URLs into import log.
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diff changeset
252 func downloadURL(url string, handler func(string, io.Reader) error) error {
1624
943823d03d50 WFS downloader: Started with mapping return features to Go structs.
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diff changeset
253 resp, err := http.Get(url)
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diff changeset
254 if err != nil {
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255 return err
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diff changeset
256 }
1626
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diff changeset
257 if resp.StatusCode < 200 || resp.StatusCode > 299 {
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diff changeset
258 return fmt.Errorf("Invalid HTTP status code: %d (%s)",
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diff changeset
259 resp.StatusCode, resp.Status)
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diff changeset
260 }
1624
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diff changeset
261 defer resp.Body.Close()
2110
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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262
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diff changeset
263 var already bytes.Buffer
2109
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
264
2110
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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diff changeset
265 // Prevent the XML reader from consuming everything.
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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diff changeset
266 limit := io.LimitReader(resp.Body, 16*1024)
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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267 in := io.TeeReader(limit, &already)
2109
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268
2110
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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diff changeset
269 if err := scanExceptionReport(in); err != nil {
2109
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270 return err
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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271 }
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diff changeset
272
2110
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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diff changeset
273 multi := io.MultiReader(bytes.NewReader(already.Bytes()), resp.Body)
fc4ebe7eaeff WFS downloader: Don't use temp files. TODO: Use a streaming scanner for the detection of the exception documents.
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diff changeset
274 return handler(url, multi)
2109
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275 }
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276
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277 type ExceptionReport struct {
2118
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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278 Code string
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
279 Text string
2109
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280 }
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diff changeset
281
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282 func (er *ExceptionReport) Error() string {
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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283 return fmt.Sprintf(
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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284 "WFS GetFeature error: ExceptionCode: '%s' / ExceptionText: %s",
2118
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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285 er.Code, er.Text)
2109
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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286 }
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diff changeset
287
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diff changeset
288 func scanExceptionReport(r io.Reader) *ExceptionReport {
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
289
2118
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diff changeset
290 const ows = "http://www.opengis.net/ows/1.1"
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
291
2109
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diff changeset
292 decoder := xml.NewDecoder(r)
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
293 decoder.CharsetReader = charset.NewReaderLabel
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
294
2118
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
295 var (
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
296 isError bool
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
297 code string
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
298 depth int
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
299 text strings.Builder
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
300 )
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
301
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
302 type tokenFunc func(xml.Token) tokenFunc
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
303
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
304 var exceptionReportFn, exceptionFn, exceptionTextFn, collectTextFn tokenFunc
2109
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
305
2118
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diff changeset
306 exceptionReportFn = func(t xml.Token) tokenFunc {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
307 e, ok := t.(xml.StartElement)
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
308 if !ok {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
309 return exceptionReportFn
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
310 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
311 if e.Name.Local != "ExceptionReport" && e.Name.Space != ows {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
312 return nil
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
313 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
314 isError = true
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
315 return exceptionFn
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
316 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
317
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
318 exceptionFn = func(t xml.Token) tokenFunc {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
319 e, ok := t.(xml.StartElement)
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parents: 2110
diff changeset
320 if !ok {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
321 return exceptionFn
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
322 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
323 if e.Name.Local == "Exception" && e.Name.Space == ows {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
324 for i := range e.Attr {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
325 at := &e.Attr[i]
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parents: 2110
diff changeset
326 if at.Name.Local == "code" || at.Name.Local == "exceptionCode" {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
327 code = at.Value
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
328 break
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
329 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
330 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
331 return exceptionTextFn
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
332 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2110
diff changeset
333 return exceptionFn
2109
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diff changeset
334 }
86c88fc0ff5e WFS downloader: Parse for exception reports when calling GetFeature. Not very efficient (uses temp files).
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diff changeset
335
2118
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diff changeset
336 exceptionTextFn = func(t xml.Token) tokenFunc {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
337 e, ok := t.(xml.StartElement)
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
338 if ok && e.Name.Local == "ExceptionText" && e.Name.Space == ows {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
339 return collectTextFn
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
340 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
341 return exceptionTextFn
2109
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342 }
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343
2118
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344 collectTextFn = func(t xml.Token) tokenFunc {
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345 switch e := t.(type) {
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346 case xml.StartElement:
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347 depth++
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348 case xml.CharData:
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349 if depth == 0 {
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350 text.Write(e)
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351 }
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parents: 2110
diff changeset
352 case xml.EndElement:
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diff changeset
353 if depth == 0 {
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parents: 2110
diff changeset
354 return nil
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parents: 2110
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355 }
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parents: 2110
diff changeset
356 depth--
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
357 }
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parents: 2110
diff changeset
358 return collectTextFn
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parents: 2110
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359 }
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parents: 2110
diff changeset
360
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parents: 2110
diff changeset
361 tokens:
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
362 for fn := exceptionReportFn; fn != nil; {
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parents: 2110
diff changeset
363 tok, err := decoder.Token()
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parents: 2110
diff changeset
364 switch {
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parents: 2110
diff changeset
365 case tok == nil && err == io.EOF:
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parents: 2110
diff changeset
366 break tokens
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parents: 2110
diff changeset
367 case err != nil:
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diff changeset
368 return nil
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parents: 2110
diff changeset
369 }
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parents: 2110
diff changeset
370 fn = fn(tok)
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parents: 2110
diff changeset
371 }
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parents: 2110
diff changeset
372
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
373 if isError {
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
374 return &ExceptionReport{
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diff changeset
375 Code: code,
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parents: 2110
diff changeset
376 Text: text.String(),
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parents: 2110
diff changeset
377 }
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parents: 2110
diff changeset
378 }
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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parents: 2110
diff changeset
379
8a6ed058af22 WFS downloader: Use a custom XML streaming parser to detect error reports.
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diff changeset
380 return nil
1624
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parents: 1619
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381 }
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parents: 1619
diff changeset
382
1689
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parents: 1626
diff changeset
383 // DownloadURLs does the actual GetFeature requests downloads
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parents: 1626
diff changeset
384 // and hands the resulting io.Readers over to the given handler.
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2b72f5e005aa WFS imports: Write get GetFeature URLs into import log.
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parents: 2096
diff changeset
385 func DownloadURLs(urls []string, handler func(string, io.Reader) error) error {
2109
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diff changeset
386 config.WaitReady()
1624
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parents: 1619
diff changeset
387 for _, url := range urls {
943823d03d50 WFS downloader: Started with mapping return features to Go structs.
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parents: 1619
diff changeset
388 if err := downloadURL(url, handler); err != nil {
1935
73f9e15d0384 WFS downloader: die correctly if an error was detected when downloading features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1689
diff changeset
389 return err
1624
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parents: 1619
diff changeset
390 }
943823d03d50 WFS downloader: Started with mapping return features to Go structs.
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parents: 1619
diff changeset
391 }
943823d03d50 WFS downloader: Started with mapping return features to Go structs.
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parents: 1619
diff changeset
392 return nil
943823d03d50 WFS downloader: Started with mapping return features to Go structs.
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parents: 1619
diff changeset
393 }