eric6/Plugins/UiExtensionPlugins/Translator/TranslatorEngines/MicrosoftEngine.py

Wed, 30 Dec 2020 11:00:44 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 30 Dec 2020 11:00:44 +0100
branch
maintenance
changeset 7924
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parent 7780
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child 8218
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permissions
-rw-r--r--

Updated copyright for 2021.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2014 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing the Microsoft translation engine.
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8 """
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9
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10 from PyQt5.QtCore import QUrl, QDateTime, QByteArray, QTimer
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11
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12 from .TranslationEngine import TranslationEngine
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13
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14
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15 class MicrosoftEngine(TranslationEngine):
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16 """
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17 Class implementing the translation engine for the Microsoft
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18 translation service.
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19 """
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20 AccessTokenUrl = (
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21 "https://api.cognitive.microsoft.com/sts/v1.0/issueToken"
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22 )
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23 TranslatorUrl = "https://api.microsofttranslator.com/V2/Http.svc/Translate"
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24 TextToSpeechUrl = "https://api.microsofttranslator.com/V2/Http.svc/Speak"
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25
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26 def __init__(self, plugin, parent=None):
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27 """
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28 Constructor
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29
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30 @param plugin reference to the plugin object (TranslatorPlugin)
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31 @param parent reference to the parent object (QObject)
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32 """
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33 super(MicrosoftEngine, self).__init__(plugin, parent)
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34
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35 self.__mappings = {
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36 "zh-CN": "zh-CHS",
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37 "zh-TW": "zh-CHT",
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38 }
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39
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40 QTimer.singleShot(0, self.availableTranslationsLoaded.emit)
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41
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42 def engineName(self):
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43 """
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44 Public method to return the name of the engine.
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45
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46 @return engine name (string)
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47 """
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48 return "microsoft"
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49
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50 def supportedLanguages(self):
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51 """
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52 Public method to get the supported languages.
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53
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54 @return list of supported language codes (list of string)
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55 """
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56 return ["ar", "bg", "ca", "cs", "da", "de", "en",
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57 "es", "et", "fi", "fr", "hi", "hu", "id",
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58 "it", "ja", "ko", "lt", "lv", "mt",
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59 "nl", "no", "pl", "pt", "ro", "ru", "sk", "sl",
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60 "sv", "th", "tr", "uk", "vi", "zh-CN", "zh-TW",
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61 ]
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62
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63 def hasTTS(self):
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64 """
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65 Public method indicating the Text-to-Speech capability.
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66
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67 @return flag indicating the Text-to-Speech capability (boolean)
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68 """
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69 return True
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70
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71 def __mapLanguageCode(self, code):
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72 """
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73 Private method to map a language code to the Microsoft code.
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74
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75 @param code language code (string)
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76 @return mapped language code (string)
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77 """
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78 if code in self.__mappings:
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79 return self.__mapping[code]
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80 else:
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81 return code
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82
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83 def __getClientDataAzure(self):
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84 """
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85 Private method to retrieve the client data.
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86
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87 @return tuple giving the API subscription key and a flag indicating
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88 validity
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89 @rtype tuple of (str, bool)
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90 """
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91 subscriptionKey = self.plugin.getPreferences("MsTranslatorKey")
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92 valid = bool(subscriptionKey)
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93 return subscriptionKey, valid
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94
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95 def __getAccessToken(self, requestObject):
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96 """
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97 Private slot to get an access token.
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98
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99 If the stored token is no longer valid, get a new one and store it.
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100
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101 @param requestObject reference to the request object
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102 (TranslatorRequest)
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103 @return access token (string)
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104 """
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105 if (
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106 self.plugin.getPreferences("MsAuthTokenExpire") >
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107 QDateTime.currentDateTime()
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108 ):
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109 return self.plugin.getPreferences("MsAuthToken")
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110
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111 # Token expired, get a new one
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112 subscriptionKey, valid = self.__getClientDataAzure()
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113 if not valid:
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114 return ""
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115
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116 subscriptionHeader = (b"Ocp-Apim-Subscription-Key",
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117 subscriptionKey.encode("utf-8"))
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118 response, ok = requestObject.post(
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119 QUrl(self.AccessTokenUrl), QByteArray(b""),
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120 extraHeaders=[subscriptionHeader])
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121 if ok:
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122 self.plugin.setPreferences("MsAuthToken", response)
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123 self.plugin.setPreferences(
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124 "MsAuthTokenExpire",
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125 QDateTime.currentDateTime().addSecs(8 * 60))
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126 return response
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127 else:
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128 return ""
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129
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130 def getTranslation(self, requestObject, text, originalLanguage,
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131 translationLanguage):
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132 """
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133 Public method to translate the given text.
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134
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135 @param requestObject reference to the request object
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136 (TranslatorRequest)
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137 @param text text to be translated (string)
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138 @param originalLanguage language code of the original (string)
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139 @param translationLanguage language code of the translation (string)
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140 @return tuple of translated text (string) and flag indicating
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141 success (boolean)
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142 """
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143 subscriptionKey, valid = self.__getClientDataAzure()
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144 if not valid:
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145 return (self.tr("""You have not registered for the Microsoft"""
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146 """ Translation service."""),
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147 False)
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148
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149 accessToken = self.__getAccessToken(requestObject)
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150 if not accessToken:
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151 return (
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152 self.tr("MS Translator: No valid access token available."),
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153 False
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154 )
6018
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155
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156 authHeader = (b"Authorization",
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157 "Bearer {0}".format(accessToken).encode("utf-8"))
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158 params = "?appid=&from={0}&to={1}&text={2}".format(
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159 self.__mapLanguageCode(originalLanguage),
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160 self.__mapLanguageCode(translationLanguage),
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161 text)
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162 url = QUrl(self.TranslatorUrl + params)
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163 response, ok = requestObject.get(url, extraHeaders=[authHeader])
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164 if ok:
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165 response = str(response, "utf-8", "replace").strip()
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166 if (
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167 response.startswith("<string") and
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168 response.endswith("</string>")
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169 ):
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170 result = response.split(">", 1)[1].rsplit("<", 1)[0]
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171 else:
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172 result = self.tr("MS Translator: No translation available.")
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173 ok = False
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174 return result, ok
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175
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176 def getTextToSpeechData(self, requestObject, text, language):
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177 """
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178 Public method to pronounce the given text.
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179
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180 @param requestObject reference to the request object
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181 (TranslatorRequest)
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182 @param text text to be pronounced (string)
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183 @param language language code of the text (string)
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184 @return tuple with pronounce data (QByteArray) or error string (string)
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185 and success flag (boolean)
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186 """
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187 subscriptionKey, valid = self.__getClientDataAzure()
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188 if not valid:
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189 return (self.tr("""You have not registered for the Microsoft"""
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parents:
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190 """ Translation service."""),
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parents:
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191 False)
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parents:
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192
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193 accessToken = self.__getAccessToken(requestObject)
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194 if not accessToken:
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195 return (
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196 self.tr("MS Translator: No valid access token available."),
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197 False
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198 )
6018
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199
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200 params = "?language={0}&format={1}&options={2}&text={3}".format(
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201 self.__mapLanguageCode(language),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 "audio/wav",
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203 "MaxQuality",
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204 text)
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parents:
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205 authHeader = (b"Authorization",
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parents:
diff changeset
206 "Bearer {0}".format(accessToken).encode("utf-8"))
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parents:
diff changeset
207 url = QUrl(self.TextToSpeechUrl + params)
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parents:
diff changeset
208 data, ok = requestObject.get(url, extraHeaders=[authHeader])
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parents:
diff changeset
209 if not ok:
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210 data = self.tr("MS Translator: No Text-to-Speech for the selected"
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
diff changeset
211 " language available.")
6018
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parents:
diff changeset
212 return data, ok

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