Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/boto/cloudsearch2/search.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
parents d30785e31577
children
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1 # Copyright (c) 2014 Amazon.com, Inc. or its affiliates.
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2 # All Rights Reserved
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3 #
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4 # Permission is hereby granted, free of charge, to any person obtaining a
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5 # copy of this software and associated documentation files (the
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6 # "Software"), to deal in the Software without restriction, including
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7 # without limitation the rights to use, copy, modify, merge, publish, dis-
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8 # tribute, sublicense, and/or sell copies of the Software, and to permit
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9 # persons to whom the Software is furnished to do so, subject to the fol-
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10 # lowing conditions:
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11 #
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12 # The above copyright notice and this permission notice shall be included
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13 # in all copies or substantial portions of the Software.
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14 #
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15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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16 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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17 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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18 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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19 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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21 # IN THE SOFTWARE.
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22 #
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23 from math import ceil
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24 from boto.compat import json, map, six
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25 import requests
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26 from boto.cloudsearchdomain.layer1 import CloudSearchDomainConnection
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27
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28 SIMPLE = 'simple'
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29 STRUCTURED = 'structured'
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30 LUCENE = 'lucene'
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31 DISMAX = 'dismax'
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32
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33
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34 class SearchServiceException(Exception):
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35 pass
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36
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37
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38 class SearchResults(object):
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39 def __init__(self, **attrs):
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40 self.rid = attrs['status']['rid']
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41 self.time_ms = attrs['status']['time-ms']
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42 self.hits = attrs['hits']['found']
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43 self.docs = attrs['hits']['hit']
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44 self.start = attrs['hits']['start']
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45 self.query = attrs['query']
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46 self.search_service = attrs['search_service']
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47
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48 self.facets = {}
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49 if 'facets' in attrs:
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50 for (facet, values) in attrs['facets'].items():
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51 if 'buckets' in values:
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52 self.facets[facet] = dict((k, v) for (k, v) in map(lambda x: (x['value'], x['count']), values.get('buckets', [])))
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53
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54 self.num_pages_needed = ceil(self.hits / self.query.real_size)
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55
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56 def __len__(self):
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57 return len(self.docs)
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58
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59 def __iter__(self):
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60 return iter(self.docs)
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61
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62 def next_page(self):
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63 """Call Cloudsearch to get the next page of search results
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64
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65 :rtype: :class:`boto.cloudsearch2.search.SearchResults`
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66 :return: the following page of search results
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67 """
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68 if self.query.page <= self.num_pages_needed:
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69 self.query.start += self.query.real_size
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70 self.query.page += 1
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71 return self.search_service(self.query)
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72 else:
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73 raise StopIteration
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74
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75
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76 class Query(object):
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77
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78 RESULTS_PER_PAGE = 500
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79
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80 def __init__(self, q=None, parser=None, fq=None, expr=None,
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81 return_fields=None, size=10, start=0, sort=None,
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82 facet=None, highlight=None, partial=None, options=None):
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83
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84 self.q = q
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85 self.parser = parser
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86 self.fq = fq
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87 self.expr = expr or {}
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88 self.sort = sort or []
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89 self.return_fields = return_fields or []
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90 self.start = start
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91 self.facet = facet or {}
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92 self.highlight = highlight or {}
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93 self.partial = partial
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94 self.options = options
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95 self.page = 0
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96 self.update_size(size)
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97
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98 def update_size(self, new_size):
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99 self.size = new_size
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100 self.real_size = Query.RESULTS_PER_PAGE if (self.size >
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101 Query.RESULTS_PER_PAGE or self.size == 0) else self.size
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102
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103 def to_params(self):
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104 """Transform search parameters from instance properties to a dictionary
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105
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106 :rtype: dict
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107 :return: search parameters
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108 """
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109 params = {'start': self.start, 'size': self.real_size}
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110
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111 if self.q:
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112 params['q'] = self.q
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113
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114 if self.parser:
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115 params['q.parser'] = self.parser
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116
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117 if self.fq:
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118 params['fq'] = self.fq
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119
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120 if self.expr:
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121 for k, v in six.iteritems(self.expr):
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122 params['expr.%s' % k] = v
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123
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124 if self.facet:
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125 for k, v in six.iteritems(self.facet):
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126 if not isinstance(v, six.string_types):
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127 v = json.dumps(v)
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128 params['facet.%s' % k] = v
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129
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130 if self.highlight:
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131 for k, v in six.iteritems(self.highlight):
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132 params['highlight.%s' % k] = v
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133
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134 if self.options:
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135 params['q.options'] = self.options
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136
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137 if self.return_fields:
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138 params['return'] = ','.join(self.return_fields)
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139
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140 if self.partial is not None:
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141 params['partial'] = self.partial
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142
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143 if self.sort:
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144 params['sort'] = ','.join(self.sort)
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145
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146 return params
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147
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148 def to_domain_connection_params(self):
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149 """
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150 Transform search parameters from instance properties to a dictionary
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151 that CloudSearchDomainConnection can accept
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152
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153 :rtype: dict
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154 :return: search parameters
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155 """
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156 params = {'start': self.start, 'size': self.real_size}
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157
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158 if self.q:
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159 params['q'] = self.q
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160
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161 if self.parser:
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162 params['query_parser'] = self.parser
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163
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164 if self.fq:
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165 params['filter_query'] = self.fq
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166
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167 if self.expr:
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168 expr = {}
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169 for k, v in six.iteritems(self.expr):
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170 expr['expr.%s' % k] = v
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171
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172 params['expr'] = expr
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173
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174 if self.facet:
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175 facet = {}
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176 for k, v in six.iteritems(self.facet):
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177 if not isinstance(v, six.string_types):
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178 v = json.dumps(v)
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179 facet['facet.%s' % k] = v
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180
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181 params['facet'] = facet
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182
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183 if self.highlight:
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184 highlight = {}
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185 for k, v in six.iteritems(self.highlight):
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186 highlight['highlight.%s' % k] = v
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187
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188 params['highlight'] = highlight
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189
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190 if self.options:
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191 params['query_options'] = self.options
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192
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193 if self.return_fields:
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194 params['ret'] = ','.join(self.return_fields)
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195
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196 if self.partial is not None:
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197 params['partial'] = self.partial
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198
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199 if self.sort:
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200 params['sort'] = ','.join(self.sort)
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201
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202 return params
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203
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204
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205 class SearchConnection(object):
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206
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207 def __init__(self, domain=None, endpoint=None):
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208 self.domain = domain
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209 self.endpoint = endpoint
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210 self.session = requests.Session()
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211
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212 # Endpoint needs to be set before initializing CloudSearchDomainConnection
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213 if not endpoint:
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214 self.endpoint = domain.search_service_endpoint
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215
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216 # Copy proxy settings from connection and check if request should be signed
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217 self.sign_request = False
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218 if self.domain and self.domain.layer1:
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219 if self.domain.layer1.use_proxy:
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220 self.session.proxies['http'] = self.domain.layer1.get_proxy_url_with_auth()
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221
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222 self.sign_request = getattr(self.domain.layer1, 'sign_request', False)
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223
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224 if self.sign_request:
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225 layer1 = self.domain.layer1
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226 self.domain_connection = CloudSearchDomainConnection(
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227 host=self.endpoint,
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228 aws_access_key_id=layer1.aws_access_key_id,
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229 aws_secret_access_key=layer1.aws_secret_access_key,
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230 region=layer1.region,
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231 provider=layer1.provider
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232 )
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233
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234 def build_query(self, q=None, parser=None, fq=None, rank=None, return_fields=None,
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235 size=10, start=0, facet=None, highlight=None, sort=None,
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236 partial=None, options=None):
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237 return Query(q=q, parser=parser, fq=fq, expr=rank, return_fields=return_fields,
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238 size=size, start=start, facet=facet, highlight=highlight,
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239 sort=sort, partial=partial, options=options)
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240
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241 def search(self, q=None, parser=None, fq=None, rank=None, return_fields=None,
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242 size=10, start=0, facet=None, highlight=None, sort=None, partial=None,
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243 options=None):
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244 """
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245 Send a query to CloudSearch
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246
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247 Each search query should use at least the q or bq argument to specify
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248 the search parameter. The other options are used to specify the
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249 criteria of the search.
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250
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251 :type q: string
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252 :param q: A string to search the default search fields for.
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253
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254 :type parser: string
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255 :param parser: The parser to use. 'simple', 'structured', 'lucene', 'dismax'
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256
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257 :type fq: string
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258 :param fq: The filter query to use.
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259
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260 :type sort: List of strings
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261 :param sort: A list of fields or rank expressions used to order the
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262 search results. Order is handled by adding 'desc' or 'asc' after the field name.
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263 ``['year desc', 'author asc']``
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264
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265 :type return_fields: List of strings
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266 :param return_fields: A list of fields which should be returned by the
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267 search. If this field is not specified, only IDs will be returned.
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268 ``['headline']``
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269
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270 :type size: int
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271 :param size: Number of search results to specify
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272
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273 :type start: int
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274 :param start: Offset of the first search result to return (can be used
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275 for paging)
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276
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277 :type facet: dict
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278 :param facet: Dictionary of fields for which facets should be returned
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279 The facet value is string of JSON options
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280 ``{'year': '{sort:"bucket", size:3}', 'genres': '{buckets:["Action","Adventure","Sci-Fi"]}'}``
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281
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282 :type highlight: dict
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283 :param highlight: Dictionary of fields for which highlights should be returned
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284 The facet value is string of JSON options
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285 ``{'genres': '{format:'text',max_phrases:2,pre_tag:'<b>',post_tag:'</b>'}'}``
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286
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287 :type partial: bool
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288 :param partial: Should partial results from a partioned service be returned if
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289 one or more index partitions are unreachable.
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290
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291 :type options: str
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292 :param options: Options for the query parser specified in *parser*.
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293 Specified as a string in JSON format.
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294 ``{fields: ['title^5', 'description']}``
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295
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296 :rtype: :class:`boto.cloudsearch2.search.SearchResults`
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297 :return: Returns the results of this search
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298
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299 The following examples all assume we have indexed a set of documents
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300 with fields: *author*, *date*, *headline*
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301
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302 A simple search will look for documents whose default text search
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303 fields will contain the search word exactly:
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304
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305 >>> search(q='Tim') # Return documents with the word Tim in them (but not Timothy)
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306
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307 A simple search with more keywords will return documents whose default
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308 text search fields contain the search strings together or separately.
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309
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310 >>> search(q='Tim apple') # Will match "tim" and "apple"
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311
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312 More complex searches require the boolean search operator.
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313
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314 Wildcard searches can be used to search for any words that start with
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315 the search string.
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316
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317 >>> search(q="'Tim*'") # Return documents with words like Tim or Timothy)
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318
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319 Search terms can also be combined. Allowed operators are "and", "or",
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320 "not", "field", "optional", "token", "phrase", or "filter"
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321
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322 >>> search(q="(and 'Tim' (field author 'John Smith'))", parser='structured')
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323
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324 Facets allow you to show classification information about the search
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325 results. For example, you can retrieve the authors who have written
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326 about Tim with a max of 3
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327
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328 >>> search(q='Tim', facet={'Author': '{sort:"bucket", size:3}'})
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329 """
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330
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331 query = self.build_query(q=q, parser=parser, fq=fq, rank=rank,
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332 return_fields=return_fields,
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333 size=size, start=start, facet=facet,
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334 highlight=highlight, sort=sort,
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335 partial=partial, options=options)
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336 return self(query)
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337
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338 def _search_with_auth(self, params):
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339 return self.domain_connection.search(params.pop("q", ""), **params)
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340
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341 def _search_without_auth(self, params, api_version):
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342 url = "http://%s/%s/search" % (self.endpoint, api_version)
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343 resp = self.session.get(url, params=params)
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344
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345 return {'body': resp.content.decode('utf-8'), 'status_code': resp.status_code}
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346
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347 def __call__(self, query):
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348 """Make a call to CloudSearch
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349
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350 :type query: :class:`boto.cloudsearch2.search.Query`
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351 :param query: A group of search criteria
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352
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353 :rtype: :class:`boto.cloudsearch2.search.SearchResults`
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354 :return: search results
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355 """
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356 api_version = '2013-01-01'
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357 if self.domain and self.domain.layer1:
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358 api_version = self.domain.layer1.APIVersion
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359
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360 if self.sign_request:
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361 data = self._search_with_auth(query.to_domain_connection_params())
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362 else:
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363 r = self._search_without_auth(query.to_params(), api_version)
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364
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365 _body = r['body']
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366 _status_code = r['status_code']
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367
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368 try:
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369 data = json.loads(_body)
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370 except ValueError:
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371 if _status_code == 403:
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372 msg = ''
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373 import re
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374 g = re.search('<html><body><h1>403 Forbidden</h1>([^<]+)<', _body)
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375 try:
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376 msg = ': %s' % (g.groups()[0].strip())
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377 except AttributeError:
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378 pass
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379 raise SearchServiceException('Authentication error from Amazon%s' % msg)
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380 raise SearchServiceException("Got non-json response from Amazon. %s" % _body, query)
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381
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382 if 'messages' in data and 'error' in data:
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383 for m in data['messages']:
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384 if m['severity'] == 'fatal':
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385 raise SearchServiceException("Error processing search %s "
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386 "=> %s" % (params, m['message']), query)
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387 elif 'error' in data:
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388 raise SearchServiceException("Unknown error processing search %s"
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389 % json.dumps(data), query)
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390
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391 data['query'] = query
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392 data['search_service'] = self
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393
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394 return SearchResults(**data)
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395
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396 def get_all_paged(self, query, per_page):
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397 """Get a generator to iterate over all pages of search results
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398
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399 :type query: :class:`boto.cloudsearch2.search.Query`
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400 :param query: A group of search criteria
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401
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402 :type per_page: int
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403 :param per_page: Number of docs in each :class:`boto.cloudsearch2.search.SearchResults` object.
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404
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405 :rtype: generator
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406 :return: Generator containing :class:`boto.cloudsearch2.search.SearchResults`
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407 """
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408 query.update_size(per_page)
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409 page = 0
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410 num_pages_needed = 0
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411 while page <= num_pages_needed:
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412 results = self(query)
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413 num_pages_needed = results.num_pages_needed
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414 yield results
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415 query.start += query.real_size
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416 page += 1
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417
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418 def get_all_hits(self, query):
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419 """Get a generator to iterate over all search results
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420
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421 Transparently handles the results paging from Cloudsearch
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422 search results so even if you have many thousands of results
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423 you can iterate over all results in a reasonably efficient
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424 manner.
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425
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426 :type query: :class:`boto.cloudsearch2.search.Query`
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427 :param query: A group of search criteria
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428
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429 :rtype: generator
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430 :return: All docs matching query
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431 """
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432 page = 0
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433 num_pages_needed = 0
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434 while page <= num_pages_needed:
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435 results = self(query)
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436 num_pages_needed = results.num_pages_needed
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437 for doc in results:
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438 yield doc
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439 query.start += query.real_size
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440 page += 1
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441
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442 def get_num_hits(self, query):
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443 """Return the total number of hits for query
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444
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445 :type query: :class:`boto.cloudsearch2.search.Query`
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446 :param query: a group of search criteria
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447
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448 :rtype: int
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449 :return: Total number of hits for query
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450 """
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451 query.update_size(1)
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452 return self(query).hits