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1 | <?php |
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2 | |||
3 | namespace Jasny; |
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4 | |||
5 | use Psr\Http\Message\ServerRequestInterface; |
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6 | use Psr\Http\Message\ResponseInterface; |
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7 | |||
8 | /** |
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9 | * Controller |
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10 | */ |
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11 | abstract class Controller |
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12 | { |
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13 | /** |
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14 | * Server request |
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15 | * @var ServerRequestInterface |
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16 | **/ |
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17 | protected $request = null; |
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18 | |||
19 | /** |
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20 | * Response |
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21 | * @var ResponseInterface |
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22 | **/ |
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23 | protected $response = null; |
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24 | |||
25 | /** |
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26 | * Run the controller |
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27 | * |
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28 | * @return ResponseInterface |
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29 | */ |
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30 | abstract public function run(); |
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31 | |||
32 | /** |
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33 | * Get request, set for controller |
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34 | * |
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35 | * @return ServerRequestInterface |
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36 | */ |
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37 | 1 | public function getRequest() |
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38 | { |
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39 | 1 | return $this->request; |
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40 | } |
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41 | |||
42 | /** |
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43 | * Get response. set for controller |
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44 | * |
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45 | * @return ResponseInterface |
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46 | */ |
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47 | 16 | public function getResponse() |
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48 | { |
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49 | 16 | return $this->response; |
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50 | } |
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51 | |||
52 | /** |
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53 | * Run the controller as function |
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54 | * |
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55 | * @param ServerRequestInterface $request |
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56 | * @param ResponseInterface $response |
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57 | * @return ResponseInterface |
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58 | */ |
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59 | 14 | public function __invoke(ServerRequestInterface $request, ResponseInterface $response) |
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60 | { |
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61 | 14 | $this->request = $request; |
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62 | 14 | $this->response = $response; |
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63 | |||
64 | 14 | return $this->run(); |
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65 | } |
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66 | |||
67 | /** |
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68 | * Check if response is 2xx succesful, or empty |
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69 | * |
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70 | * @return boolean |
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71 | */ |
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72 | 14 | public function isSuccessful() |
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73 | { |
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74 | 14 | $code = $this->getResponseStatusCode(); |
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75 | |||
76 | 14 | return !$code || ($code >= 200 && $code < 300); |
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77 | } |
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78 | |||
79 | /** |
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80 | * Check if response is a 3xx redirect |
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81 | * |
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82 | * @return boolean |
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83 | */ |
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84 | 14 | public function isRedirection() |
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85 | { |
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86 | 14 | $code = $this->getResponseStatusCode(); |
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87 | |||
88 | 14 | return $code >= 300 && $code < 400; |
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89 | } |
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90 | |||
91 | /** |
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92 | * Check if response is a 4xx client error |
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93 | * |
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94 | * @return boolean |
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95 | */ |
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96 | 14 | public function isClientError() |
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97 | { |
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98 | 14 | $code = $this->getResponseStatusCode(); |
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99 | |||
100 | 14 | return $code >= 400 && $code < 500; |
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101 | } |
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102 | |||
103 | /** |
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104 | * Check if response is a 5xx redirect |
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105 | * |
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106 | * @return boolean |
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107 | */ |
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108 | 14 | public function isServerError() |
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109 | { |
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110 | 14 | return $this->getResponseStatusCode() >= 500; |
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111 | } |
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112 | |||
113 | /** |
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114 | * Check if response is 4xx or 5xx error |
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115 | * |
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116 | * @return boolean |
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117 | */ |
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118 | 13 | public function isError() |
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119 | { |
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120 | 13 | return $this->isClientError() || $this->isServerError(); |
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121 | } |
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122 | |||
123 | /** |
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124 | * Encode data to send to client |
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125 | * |
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126 | * @param mixed $data |
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127 | * @return string |
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128 | */ |
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129 | 13 | public function encodeData($data) |
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130 | { |
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131 | 13 | $response = $this->getResponse(); |
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132 | 13 | $invalid = !$response || |
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133 | 12 | !($type = $response->getHeaderLine('Content-Type')) || |
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134 | 13 | !in_array($type, ['application/json', 'text/xml', 'application/xml'], true); |
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135 | |||
136 | 13 | if ($invalid) { |
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137 | 6 | throw new \RuntimeException("Valid content type is not set in response for encoding data"); |
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138 | } |
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139 | |||
140 | switch ($type) { |
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141 | 7 | case 'application/json': |
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142 | 5 | return $this->encodeDataAsJson($data); |
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143 | 2 | case 'text/xml': |
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144 | 2 | case 'application/xml': |
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145 | 2 | return $this->encodeDataAsXml($data); |
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146 | } |
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147 | } |
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148 | |||
149 | /** |
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150 | * Encode data as xml |
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151 | * |
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152 | * @param \SimpleXMLElement $data |
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153 | * @return string |
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154 | */ |
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155 | 2 | protected function encodeDataAsXml(\SimpleXMLElement $data) |
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156 | { |
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157 | 2 | return $data->asXML(); |
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158 | } |
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159 | |||
160 | /** |
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161 | * Encode data as json |
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162 | * |
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163 | * @param mixed |
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164 | * @return string |
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165 | */ |
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166 | 5 | protected function encodeDataAsJson($data) |
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167 | { |
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168 | 5 | $data = json_encode($data); |
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169 | |||
170 | 5 | return $this->isJsonp() ? |
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171 | 5 | $this->getRequest()->getQueryParams()['callback'] . '(' . $data . ')' : |
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172 | 5 | $data; |
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173 | } |
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174 | |||
175 | /** |
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176 | * Check if we should respond with jsonp |
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177 | * |
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178 | * @return boolean |
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179 | */ |
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180 | 5 | protected function isJsonp() |
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181 | { |
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182 | 5 | $request = $this->getRequest(); |
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183 | |||
184 | 5 | return $request && !empty($request->getQueryParams()['callback']); |
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185 | } |
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186 | |||
187 | /** |
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188 | * Get status code of response |
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189 | * |
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190 | * @return int |
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191 | */ |
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192 | 14 | protected function getResponseStatusCode() |
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193 | { |
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194 | 14 | $response = $this->getResponse(); |
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195 | |||
196 | 14 | return $response ? $response->getStatusCode() : 0; |
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197 | } |
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198 | } |
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199 | |||
200 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: