1 | <?php |
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2 | |||
3 | /** |
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4 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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5 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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6 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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7 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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8 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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9 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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10 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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11 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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12 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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13 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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14 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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15 | * |
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16 | * This software consists of voluntary contributions made by many individuals |
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17 | * and is licensed under the LGPL. For more information please see |
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18 | * <http://phing.info>. |
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19 | */ |
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20 | |||
21 | namespace Phing\Filter; |
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22 | |||
23 | use DOMDocument; |
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24 | use Phing\Exception\BuildException; |
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25 | use Phing\Io\BufferedReader; |
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26 | use Phing\Io\File; |
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27 | use Phing\Io\FileReader; |
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28 | use Phing\Io\FilterReader; |
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29 | use Phing\Io\IOException; |
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30 | use Phing\Io\Reader; |
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31 | use Phing\Project; |
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32 | use XSLTProcessor; |
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33 | |||
34 | /** |
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35 | * Applies XSL stylesheet to incoming text. |
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36 | * |
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37 | * Uses PHP XSLT support (libxslt). |
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38 | * |
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39 | * @author Hans Lellelid <[email protected]> |
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40 | * @author Yannick Lecaillez <[email protected]> |
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41 | * @author Andreas Aderhold <[email protected]> |
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42 | * |
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43 | * @see FilterReader |
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44 | */ |
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45 | class XsltFilter extends BaseParamFilterReader implements ChainableReader |
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46 | { |
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47 | /** |
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48 | * Path to XSL stylesheet. |
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49 | * |
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50 | * @var File |
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51 | */ |
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52 | private $xslFile; |
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53 | |||
54 | /** |
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55 | * Whether XML file has been transformed. |
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56 | * |
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57 | * @var bool |
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58 | */ |
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59 | private $processed = false; |
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60 | |||
61 | /** |
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62 | * XSLT Params. |
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63 | * |
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64 | * @var XsltParam[] |
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65 | */ |
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66 | private $xsltParams = []; |
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67 | |||
68 | /** |
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69 | * Whether to use loadHTML() to parse the input XML file. |
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70 | */ |
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71 | private $html = false; |
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72 | |||
73 | /** |
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74 | * Whether to resolve entities in the XML document (see |
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75 | * {@link http://www.php.net/manual/en/class.domdocument.php#domdocument.props.resolveexternals} |
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76 | * for more details). |
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77 | * |
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78 | * @var bool |
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79 | * |
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80 | * @since 2.4 |
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81 | */ |
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82 | private $resolveDocumentExternals = false; |
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83 | |||
84 | /** |
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85 | * Whether to resolve entities in the stylesheet. |
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86 | * |
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87 | * @var bool |
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88 | * |
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89 | * @since 2.4 |
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90 | */ |
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91 | private $resolveStylesheetExternals = false; |
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92 | |||
93 | /** |
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94 | * Create new XSLT Param object, to handle the <param/> nested element. |
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95 | * |
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96 | * @return XsltParam |
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97 | */ |
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98 | public function createParam() |
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99 | { |
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100 | $num = array_push($this->xsltParams, new XsltParam()); |
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101 | |||
102 | return $this->xsltParams[$num - 1]; |
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103 | } |
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104 | |||
105 | /** |
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106 | * Sets the XSLT params for this class. |
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107 | * This is used to "clone" this class, in the chain() method. |
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108 | * |
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109 | * @param array $params |
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110 | */ |
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111 | public function setParams($params) |
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112 | { |
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113 | $this->xsltParams = $params; |
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114 | } |
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115 | |||
116 | /** |
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117 | * Returns the XSLT params set for this class. |
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118 | * This is used to "clone" this class, in the chain() method. |
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119 | * |
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120 | * @return array |
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121 | */ |
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122 | public function getParams() |
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123 | { |
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124 | return $this->xsltParams; |
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125 | } |
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126 | |||
127 | /** |
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128 | * Set the XSLT stylesheet. |
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129 | * |
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130 | * @param mixed $file phingFile object or path |
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131 | */ |
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132 | public function setStyle(File $file) |
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133 | { |
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134 | $this->xslFile = $file; |
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135 | } |
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136 | |||
137 | /** |
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138 | * Whether to use HTML parser for the XML. |
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139 | * This is supported in libxml2 -- Yay! |
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140 | * |
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141 | * @return bool |
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142 | */ |
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143 | public function getHtml() |
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144 | { |
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145 | return $this->html; |
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146 | } |
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147 | |||
148 | /** |
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149 | * Whether to use HTML parser for XML. |
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150 | * |
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151 | * @param bool $b |
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152 | */ |
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153 | public function setHtml($b) |
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154 | { |
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155 | $this->html = (bool) $b; |
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156 | } |
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157 | |||
158 | /** |
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159 | * Get the path to XSLT stylesheet. |
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160 | * |
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161 | * @return file XSLT stylesheet path |
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162 | */ |
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163 | public function getStyle() |
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164 | { |
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165 | return $this->xslFile; |
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166 | } |
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167 | |||
168 | /** |
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169 | * Whether to resolve entities in document. |
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170 | * |
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171 | * @since 2.4 |
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172 | */ |
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173 | public function setResolveDocumentExternals(bool $resolveExternals) |
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174 | { |
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175 | $this->resolveDocumentExternals = $resolveExternals; |
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176 | } |
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177 | |||
178 | /** |
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179 | * @return bool |
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180 | * |
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181 | * @since 2.4 |
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182 | */ |
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183 | public function getResolveDocumentExternals() |
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184 | { |
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185 | return $this->resolveDocumentExternals; |
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186 | } |
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187 | |||
188 | /** |
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189 | * Whether to resolve entities in stylesheet. |
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190 | * |
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191 | * @since 2.4 |
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192 | */ |
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193 | public function setResolveStylesheetExternals(bool $resolveExternals) |
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194 | { |
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195 | $this->resolveStylesheetExternals = $resolveExternals; |
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196 | } |
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197 | |||
198 | /** |
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199 | * @return bool |
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200 | * |
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201 | * @since 2.4 |
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202 | */ |
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203 | public function getResolveStylesheetExternals() |
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204 | { |
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205 | return $this->resolveStylesheetExternals; |
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206 | } |
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207 | |||
208 | /** |
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209 | * Reads stream, applies XSLT and returns resulting stream. |
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210 | * |
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211 | * @param int $len |
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212 | * |
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213 | * @throws BuildException |
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214 | * |
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215 | * @return string transformed buffer |
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216 | */ |
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217 | public function read($len = null) |
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218 | { |
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219 | if (!class_exists('XSLTProcessor')) { |
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220 | throw new BuildException('Could not find the XSLTProcessor class. Make sure PHP has been compiled/configured to support XSLT.'); |
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221 | } |
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222 | |||
223 | if (true === $this->processed) { |
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224 | return -1; // EOF |
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225 | } |
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226 | |||
227 | if (!$this->getInitialized()) { |
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228 | $this->initialize(); |
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229 | $this->setInitialized(true); |
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230 | } |
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231 | |||
232 | // Read XML |
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233 | $_xml = null; |
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234 | while (($data = $this->in->read($len)) !== -1) { |
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235 | $_xml .= $data; |
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236 | } |
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237 | |||
238 | if (null === $_xml) { // EOF? |
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239 | return -1; |
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240 | } |
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241 | |||
242 | if (empty($_xml)) { |
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243 | $this->log('XML file is empty!', Project::MSG_WARN); |
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244 | |||
245 | return ''; // return empty string, don't attempt to apply XSLT |
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246 | } |
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247 | |||
248 | // Read XSLT |
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249 | $_xsl = null; |
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250 | $br = new BufferedReader(new FileReader($this->xslFile)); |
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251 | $_xsl = $br->read(); |
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252 | |||
253 | $this->log( |
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254 | 'Tranforming XML ' . $this->in->getResource() . ' using style ' . $this->xslFile->getPath(), |
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255 | Project::MSG_VERBOSE |
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256 | ); |
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257 | |||
258 | $out = ''; |
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259 | |||
260 | try { |
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261 | $out = $this->process($_xml, $_xsl); |
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262 | $this->processed = true; |
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263 | } catch (IOException $e) { |
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264 | throw new BuildException($e); |
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265 | } |
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266 | |||
267 | return $out; |
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268 | } |
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269 | |||
270 | /** |
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271 | * Creates a new XsltFilter using the passed in |
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272 | * Reader for instantiation. |
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273 | * |
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274 | * @param Reader A Reader object providing the underlying stream. |
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275 | * Must not be <code>null</code>. |
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276 | * |
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277 | * @return XsltFilter A new filter based on this configuration, but filtering |
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278 | * the specified reader |
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279 | */ |
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280 | public function chain(Reader $reader): Reader |
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281 | { |
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282 | $newFilter = new XsltFilter($reader); |
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283 | $newFilter->setProject($this->getProject()); |
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284 | $newFilter->setStyle($this->getStyle()); |
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285 | $newFilter->setInitialized(true); |
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286 | $newFilter->setParams($this->getParams()); |
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287 | $newFilter->setHtml($this->getHtml()); |
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288 | |||
289 | return $newFilter; |
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290 | } |
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291 | |||
292 | // {{{ method _ProcessXsltTransformation($xml, $xslt) throws BuildException |
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293 | |||
294 | /** |
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295 | * Try to process the XSLT transformation. |
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296 | * |
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297 | * @param string $xml XML to process |
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298 | * @param string $xsl XSLT sheet to use for the processing |
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299 | * |
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300 | * @throws BuildException On XSLT errors |
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301 | * |
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302 | * @return string |
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303 | */ |
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304 | protected function process($xml, $xsl) |
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305 | { |
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306 | $processor = new XSLTProcessor(); |
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307 | |||
308 | // Create and setup document. |
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309 | $xmlDom = new DOMDocument(); |
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310 | $xmlDom->resolveExternals = $this->resolveDocumentExternals; |
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311 | |||
312 | // Create and setup stylesheet. |
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313 | $xslDom = new DOMDocument(); |
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314 | $xslDom->resolveExternals = $this->resolveStylesheetExternals; |
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315 | |||
316 | if ($this->html) { |
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317 | $result = @$xmlDom->loadHTML($xml); |
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318 | } else { |
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319 | $result = @$xmlDom->loadXML($xml); |
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320 | } |
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321 | |||
322 | if (false === $result) { |
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323 | throw new BuildException('Invalid syntax detected.'); |
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324 | } |
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325 | |||
326 | $xslDom->loadXML($xsl); |
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327 | |||
328 | if (defined('XSL_SECPREF_WRITE_FILE')) { |
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329 | $processor->setSecurityPrefs(XSL_SECPREF_WRITE_FILE | XSL_SECPREF_CREATE_DIRECTORY); |
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330 | } |
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331 | $processor->importStylesheet($xslDom); |
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332 | |||
333 | // ignoring param "type" attrib, because |
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334 | // we're only supporting direct XSL params right now |
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335 | foreach ($this->xsltParams as $param) { |
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336 | $this->log('Setting XSLT param: ' . $param->getName() . '=>' . $param->getExpression(), Project::MSG_DEBUG); |
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337 | $processor->setParameter(null, $param->getName(), $param->getExpression()); |
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338 | } |
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339 | |||
340 | $errorlevel = error_reporting(); |
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341 | error_reporting($errorlevel & ~E_WARNING); |
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342 | @$result = $processor->transformToXml($xmlDom); |
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343 | error_reporting($errorlevel); |
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344 | |||
345 | if (false === $result) { |
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346 | //$errno = xslt_errno($processor); |
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347 | //$err = xslt_error($processor); |
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348 | throw new BuildException('XSLT Error'); |
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349 | } |
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350 | |||
351 | return $result; |
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352 | } |
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353 | |||
354 | /** |
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355 | * Parses the parameters to get stylesheet path. |
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356 | */ |
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357 | private function initialize() |
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358 | { |
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359 | $params = $this->getParameters(); |
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360 | if (null !== $params) { |
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361 | for ($i = 0, $_i = count($params); $i < $_i; ++$i) { |
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362 | if (null === $params[$i]->getType()) { |
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363 | if ('style' === $params[$i]->getName()) { |
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364 | $this->setStyle($params[$i]->getValue()); |
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365 | } |
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366 | } elseif ('param' == $params[$i]->getType()) { |
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367 | $xp = new XsltParam(); |
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368 | $xp->setName($params[$i]->getName()); |
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369 | $xp->setExpression($params[$i]->getValue()); |
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370 | $this->xsltParams[] = $xp; |
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371 | } |
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372 | } |
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373 | } |
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374 | } |
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375 | } |
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376 |