Mercurial > gemma

annotate pkg/soap/soap.go @ 3161:6a44a89ffb51

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SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 06 May 2019 13:19:59 +0200
parents 7ee9bdaac336
children bd1385c00b59
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1017
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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 "context"
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19 "crypto/tls"
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20 "encoding/xml"
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21 "fmt"
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22 "io/ioutil"
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23 "log"
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24 "math/rand"
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25 "net"
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26 "net/http"
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27 "sync"
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28 "time"
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29
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30 "gemma.intevation.de/gemma/pkg/config"
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31 )
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32
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33 const timeout = time.Duration(30 * time.Second)
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34
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35 func dialTimeout(network, addr string) (net.Conn, error) {
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36 return net.DialTimeout(network, addr, timeout)
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37 }
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38
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39 type SOAPEnvelope struct {
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40 XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
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41 Header *SOAPHeader
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42 Body SOAPBody
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43 }
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44
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45 type SOAPHeader struct {
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46 XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Header"`
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47
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48 Items []interface{} `xml:",omitempty"`
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49 }
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50
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51 type SOAPBody struct {
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52 XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
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53
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54 Fault *SOAPFault `xml:",omitempty"`
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55 Content interface{} `xml:",omitempty"`
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56 }
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57
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58 type SOAPFault struct {
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59 XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Fault"`
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60
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61 Code string `xml:"faultcode,omitempty"`
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62 String string `xml:"faultstring,omitempty"`
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63 Actor string `xml:"faultactor,omitempty"`
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64 Detail string `xml:"detail,omitempty"`
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65 }
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66
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67 const (
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68 // Predefined WSS namespaces to be used in
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69 WssNsWSSE string = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"
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70 WssNsWSU string = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
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71 WssNsType string = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText"
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72 )
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73
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74 type WSSSecurityHeader struct {
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75 XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ wsse:Security"`
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76 XmlNSWsse string `xml:"xmlns:wsse,attr"`
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77
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78 MustUnderstand string `xml:"mustUnderstand,attr,omitempty"`
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79
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80 Token *WSSUsernameToken `xml:",omitempty"`
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81 }
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82
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83 type WSSUsernameToken struct {
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84 XMLName xml.Name `xml:"wsse:UsernameToken"`
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85 XmlNSWsu string `xml:"xmlns:wsu,attr"`
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86 XmlNSWsse string `xml:"xmlns:wsse,attr"`
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87
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88 Id string `xml:"wsu:Id,attr,omitempty"`
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89
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90 Username *WSSUsername `xml:",omitempty"`
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91 Password *WSSPassword `xml:",omitempty"`
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92 }
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93
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94 type WSSUsername struct {
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95 XMLName xml.Name `xml:"wsse:Username"`
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96 XmlNSWsse string `xml:"xmlns:wsse,attr"`
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97
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98 Data string `xml:",chardata"`
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99 }
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100
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101 type WSSPassword struct {
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102 XMLName xml.Name `xml:"wsse:Password"`
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103 XmlNSWsse string `xml:"xmlns:wsse,attr"`
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104 XmlNSType string `xml:"Type,attr"`
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105
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106 Data string `xml:",chardata"`
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107 }
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108
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109 type BasicAuth struct {
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110 Login string
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111 Password string
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112 }
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113
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114 type SOAPClient struct {
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115 url string
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116 tlsCfg *tls.Config
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117 auth *BasicAuth
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118 headers []interface{}
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119 }
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120
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121 // **********
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122 // Accepted solution from http://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-golang
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123 // Author: Icza - http://stackoverflow.com/users/1705598/icza
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124
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125 const (
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126 letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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127 letterIdxBits = 6 // 6 bits to represent a letter index
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128 letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
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129 letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
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130 )
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131
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132 func randStringBytesMaskImprSrc(n int) string {
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133 src := rand.NewSource(time.Now().UnixNano())
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134 b := make([]byte, n)
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135 // A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
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136 for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
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137 if remain == 0 {
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138 cache, remain = src.Int63(), letterIdxMax
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139 }
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140 if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
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141 b[i] = letterBytes[idx]
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142 i--
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143 }
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144 cache >>= letterIdxBits
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145 remain--
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146 }
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147 return string(b)
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148 }
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149
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150 // **********
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151
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152 func NewWSSSecurityHeader(user, pass, mustUnderstand string) *WSSSecurityHeader {
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153 hdr := &WSSSecurityHeader{XmlNSWsse: WssNsWSSE, MustUnderstand: mustUnderstand}
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154 hdr.Token = &WSSUsernameToken{XmlNSWsu: WssNsWSU, XmlNSWsse: WssNsWSSE, Id: "UsernameToken-" + randStringBytesMaskImprSrc(9)}
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155 hdr.Token.Username = &WSSUsername{XmlNSWsse: WssNsWSSE, Data: user}
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156 hdr.Token.Password = &WSSPassword{XmlNSWsse: WssNsWSSE, XmlNSType: WssNsType, Data: pass}
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157 return hdr
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158 }
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159
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160 func (b *SOAPBody) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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161 if b.Content == nil {
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162 return xml.UnmarshalError("Content must be a pointer to a struct")
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163 }
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164
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165 var (
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166 token xml.Token
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167 err error
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168 consumed bool
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169 )
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170
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171 Loop:
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172 for {
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173 if token, err = d.Token(); err != nil {
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174 return err
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175 }
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176
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177 if token == nil {
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178 break
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179 }
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180
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181 switch se := token.(type) {
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182 case xml.StartElement:
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183 if consumed {
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184 return xml.UnmarshalError("Found multiple elements inside SOAP body; not wrapped-document/literal WS-I compliant")
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185 } else if se.Name.Space == "http://schemas.xmlsoap.org/soap/envelope/" && se.Name.Local == "Fault" {
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186 b.Fault = &SOAPFault{}
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187 b.Content = nil
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188
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189 err = d.DecodeElement(b.Fault, &se)
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190 if err != nil {
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191 return err
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192 }
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193
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194 consumed = true
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195 } else {
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196 if err = d.DecodeElement(b.Content, &se); err != nil {
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197 return err
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diff changeset
198 }
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199
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200 consumed = true
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diff changeset
201 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
202 case xml.EndElement:
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203 break Loop
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parents:
diff changeset
204 }
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parents:
diff changeset
205 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
206
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207 return nil
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parents:
diff changeset
208 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
209
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210 func (f *SOAPFault) Error() string {
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211 return f.String
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parents:
diff changeset
212 }
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diff changeset
213
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214 func NewSOAPClient(url string, insecureSkipVerify bool, auth *BasicAuth) *SOAPClient {
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215 tlsCfg := &tls.Config{
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diff changeset
216 InsecureSkipVerify: insecureSkipVerify,
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diff changeset
217 }
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diff changeset
218 return NewSOAPClientWithTLSConfig(url, tlsCfg, auth)
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parents:
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219 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220
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parents:
diff changeset
221 func NewSOAPClientWithTLSConfig(url string, tlsCfg *tls.Config, auth *BasicAuth) *SOAPClient {
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diff changeset
222 return &SOAPClient{
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parents:
diff changeset
223 url: url,
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parents:
diff changeset
224 tlsCfg: tlsCfg,
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diff changeset
225 auth: auth,
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parents:
diff changeset
226 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228
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diff changeset
229 func (s *SOAPClient) AddHeader(header interface{}) {
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diff changeset
230 s.headers = append(s.headers, header)
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diff changeset
231 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
232
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
233 func (s *SOAPClient) Call(soapAction string, request, response interface{}) error {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
234 envelope := SOAPEnvelope{}
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parents:
diff changeset
235
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236 if s.headers != nil && len(s.headers) > 0 {
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diff changeset
237 soapHeader := &SOAPHeader{Items: make([]interface{}, len(s.headers))}
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parents:
diff changeset
238 copy(soapHeader.Items, s.headers)
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parents:
diff changeset
239 envelope.Header = soapHeader
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
240 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
241
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
242 envelope.Body.Content = request
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parents:
diff changeset
243 buffer := new(bytes.Buffer)
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parents:
diff changeset
244
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 encoder := xml.NewEncoder(buffer)
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246 //encoder.Indent("", " ")
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247
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248 if err := encoder.Encode(envelope); err != nil {
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249 return err
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parents:
diff changeset
250 }
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parents:
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251
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parents:
diff changeset
252 if err := encoder.Flush(); err != nil {
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parents:
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253 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
254 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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255
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256 //log.Println(buffer.String())
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257
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diff changeset
258 req, err := http.NewRequest("POST", s.url, buffer)
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parents:
diff changeset
259 if err != nil {
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parents:
diff changeset
260 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
261 }
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parents:
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262 if s.auth != nil {
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263 req.SetBasicAuth(s.auth.Login, s.auth.Password)
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264 }
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parents:
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265
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266 req.Header.Add("Content-Type", "text/xml; charset=\"utf-8\"")
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parents:
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267 req.Header.Add("SOAPAction", soapAction)
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268
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269 req.Header.Set("User-Agent", "gowsdl/0.1")
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270 req.Close = true
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271
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272 tr := &http.Transport{
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273 TLSClientConfig: s.tlsCfg,
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parents:
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274 Dial: dialTimeout,
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parents:
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275 }
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parents:
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276
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277 client := &http.Client{Transport: tr}
1810
7ee9bdaac336 Waterway gauge import: Added support for username/password.
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parents: 1017
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278
3161
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parents: 1810
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279 timeout := config.SOAPTimeout()
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parents: 1810
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280
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parents: 1810
diff changeset
281 ctx, cancel := context.WithTimeout(context.Background(), timeout)
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parents: 1810
diff changeset
282
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parents: 1810
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283 var once sync.Once
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
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284
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
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285 defer once.Do(cancel)
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parents: 1810
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286
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
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287 req = req.WithContext(ctx)
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1810
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288
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1810
diff changeset
289 go func() {
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
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290 defer once.Do(cancel)
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
diff changeset
291 <-ctx.Done()
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
diff changeset
292 }()
6a44a89ffb51 SOAP: Added a globally configurable timeout (default 1min) till a SOAP request is canceled.
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parents: 1810
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293
566
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parents:
diff changeset
294 res, err := client.Do(req)
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parents:
diff changeset
295 if err != nil {
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
296 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
297 }
1810
7ee9bdaac336 Waterway gauge import: Added support for username/password.
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parents: 1017
diff changeset
298 if res.StatusCode < http.StatusOK || res.StatusCode > 299 {
7ee9bdaac336 Waterway gauge import: Added support for username/password.
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parents: 1017
diff changeset
299 return fmt.Errorf(
7ee9bdaac336 Waterway gauge import: Added support for username/password.
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parents: 1017
diff changeset
300 "HTTP error: %d (%s)", res.StatusCode, http.StatusText(res.StatusCode))
7ee9bdaac336 Waterway gauge import: Added support for username/password.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1017
diff changeset
301 }
566
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parents:
diff changeset
302 defer res.Body.Close()
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parents:
diff changeset
303
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parents:
diff changeset
304 rawbody, err := ioutil.ReadAll(res.Body)
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parents:
diff changeset
305 if err != nil {
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
306 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
307 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
308 if len(rawbody) == 0 {
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
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parents:
diff changeset
309 log.Println("empty response")
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
310 return nil
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
311 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
312
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
313 //log.Println(string(rawbody))
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
314 respEnvelope := new(SOAPEnvelope)
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parents:
diff changeset
315 respEnvelope.Body = SOAPBody{Content: response}
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
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parents:
diff changeset
316 err = xml.Unmarshal(rawbody, respEnvelope)
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
317 if err != nil {
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
318 return err
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
319 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
320
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
321 fault := respEnvelope.Body.Fault
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
322 if fault != nil {
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
323 return fault
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
324 }
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
325
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
326 return nil
5e45f441aed6 Added SOAP client for the IFBN bottleneck service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
327 }