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1 <?php 2 /** 3 * Atom Syndication Format PHP Library 4 * 5 * @package AtomLib 6 * @link http://code.google.com/p/phpatomlib/ 7 * 8 * @author Elias Torres <elias@torrez.us> 9 * @version 0.4 10 * @since 2.3 11 */ 12 13 /** 14 * Structure that store common Atom Feed Properties 15 * 16 * @package AtomLib 17 */ 18 class AtomFeed { 19 /** 20 * Stores Links 21 * @var array 22 * @access public 23 */ 24 var $links = array(); 25 /** 26 * Stores Categories 27 * @var array 28 * @access public 29 */ 30 var $categories = array(); 31 /** 32 * Stores Entries 33 * 34 * @var array 35 * @access public 36 */ 37 var $entries = array(); 38 } 39 40 /** 41 * Structure that store Atom Entry Properties 42 * 43 * @package AtomLib 44 */ 45 class AtomEntry { 46 /** 47 * Stores Links 48 * @var array 49 * @access public 50 */ 51 var $links = array(); 52 /** 53 * Stores Categories 54 * @var array 55 * @access public 56 */ 57 var $categories = array(); 58 } 59 60 /** 61 * AtomLib Atom Parser API 62 * 63 * @package AtomLib 64 */ 65 class AtomParser { 66 67 var $NS = 'http://www.w3.org/2005/Atom'; 68 var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights'); 69 var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft'); 70 71 var $debug = false; 72 73 var $depth = 0; 74 var $indent = 2; 75 var $in_content; 76 var $ns_contexts = array(); 77 var $ns_decls = array(); 78 var $content_ns_decls = array(); 79 var $content_ns_contexts = array(); 80 var $is_xhtml = false; 81 var $is_html = false; 82 var $is_text = true; 83 var $skipped_div = false; 84 85 var $FILE = "php://input"; 86 87 var $feed; 88 var $current; 89 90 function AtomParser() { 91 92 $this->feed = new AtomFeed(); 93 $this->current = null; 94 $this->map_attrs_func = create_function('$k,$v', 'return "$k=\"$v\"";'); 95 $this->map_xmlns_func = create_function('$p,$n', '$xd = "xmlns"; if(strlen($n[0])>0) $xd .= ":{$n[0]}"; return "{$xd}=\"{$n[1]}\"";'); 96 } 97 98 function _p($msg) { 99 if($this->debug) { 100 print str_repeat(" ", $this->depth * $this->indent) . $msg ."\n"; 101 } 102 } 103 104 function error_handler($log_level, $log_text, $error_file, $error_line) { 105 $this->error = $log_text; 106 } 107 108 function parse() { 109 110 set_error_handler(array(&$this, 'error_handler')); 111 112 array_unshift($this->ns_contexts, array()); 113 114 $parser = xml_parser_create_ns(); 115 xml_set_object($parser, $this); 116 xml_set_element_handler($parser, "start_element", "end_element"); 117 xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0); 118 xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0); 119 xml_set_character_data_handler($parser, "cdata"); 120 xml_set_default_handler($parser, "_default"); 121 xml_set_start_namespace_decl_handler($parser, "start_ns"); 122 xml_set_end_namespace_decl_handler($parser, "end_ns"); 123 124 $this->content = ''; 125 126 $ret = true; 127 128 $fp = fopen($this->FILE, "r"); 129 while ($data = fread($fp, 4096)) { 130 if($this->debug) $this->content .= $data; 131 132 if(!xml_parse($parser, $data, feof($fp))) { 133 trigger_error(sprintf(__('XML error: %s at line %d')."\n", 134 xml_error_string(xml_get_error_code($parser)), 135 xml_get_current_line_number($parser))); 136 $ret = false; 137 break; 138 } 139 } 140 fclose($fp); 141 142 xml_parser_free($parser); 143 144 restore_error_handler(); 145 146 return $ret; 147 } 148 149 function start_element($parser, $name, $attrs) { 150 151 $tag = array_pop(split(":", $name)); 152 153 switch($name) { 154 case $this->NS . ':feed': 155 $this->current = $this->feed; 156 break; 157 case $this->NS . ':entry': 158 $this->current = new AtomEntry(); 159 break; 160 }; 161 162 $this->_p("start_element('$name')"); 163 #$this->_p(print_r($this->ns_contexts,true)); 164 #$this->_p('current(' . $this->current . ')'); 165 166 array_unshift($this->ns_contexts, $this->ns_decls); 167 168 $this->depth++; 169 170 if(!empty($this->in_content)) { 171 172 $this->content_ns_decls = array(); 173 174 if($this->is_html || $this->is_text) 175 trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup."); 176 177 $attrs_prefix = array(); 178 179 // resolve prefixes for attributes 180 foreach($attrs as $key => $value) { 181 $with_prefix = $this->ns_to_prefix($key, true); 182 $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value); 183 } 184 185 $attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix))); 186 if(strlen($attrs_str) > 0) { 187 $attrs_str = " " . $attrs_str; 188 } 189 190 $with_prefix = $this->ns_to_prefix($name); 191 192 if(!$this->is_declared_content_ns($with_prefix[0])) { 193 array_push($this->content_ns_decls, $with_prefix[0]); 194 } 195 196 $xmlns_str = ''; 197 if(count($this->content_ns_decls) > 0) { 198 array_unshift($this->content_ns_contexts, $this->content_ns_decls); 199 $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0]))); 200 if(strlen($xmlns_str) > 0) { 201 $xmlns_str = " " . $xmlns_str; 202 } 203 } 204 205 array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">")); 206 207 } else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) || in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) { 208 $this->in_content = array(); 209 $this->is_xhtml = $attrs['type'] == 'xhtml'; 210 $this->is_html = $attrs['type'] == 'html' || $attrs['type'] == 'text/html'; 211 $this->is_text = !in_array('type',array_keys($attrs)) || $attrs['type'] == 'text'; 212 $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type'])); 213 214 if(in_array('src',array_keys($attrs))) { 215 $this->current->$tag = $attrs; 216 } else { 217 array_push($this->in_content, array($tag,$this->depth, $type)); 218 } 219 } else if($tag == 'link') { 220 array_push($this->current->links, $attrs); 221 } else if($tag == 'category') { 222 array_push($this->current->categories, $attrs); 223 } 224 225 $this->ns_decls = array(); 226 } 227 228 function end_element($parser, $name) { 229 230 $tag = array_pop(split(":", $name)); 231 232 $ccount = count($this->in_content); 233 234 # if we are *in* content, then let's proceed to serialize it 235 if(!empty($this->in_content)) { 236 # if we are ending the original content element 237 # then let's finalize the content 238 if($this->in_content[0][0] == $tag && 239 $this->in_content[0][1] == $this->depth) { 240 $origtype = $this->in_content[0][2]; 241 array_shift($this->in_content); 242 $newcontent = array(); 243 foreach($this->in_content as $c) { 244 if(count($c) == 3) { 245 array_push($newcontent, $c[2]); 246 } else { 247 if($this->is_xhtml || $this->is_text) { 248 array_push($newcontent, $this->xml_escape($c)); 249 } else { 250 array_push($newcontent, $c); 251 } 252 } 253 } 254 if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) { 255 $this->current->$tag = array($origtype, join('',$newcontent)); 256 } else { 257 $this->current->$tag = join('',$newcontent); 258 } 259 $this->in_content = array(); 260 } else if($this->in_content[$ccount-1][0] == $tag && 261 $this->in_content[$ccount-1][1] == $this->depth) { 262 $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>"; 263 } else { 264 # else, just finalize the current element's content 265 $endtag = $this->ns_to_prefix($name); 266 array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>")); 267 } 268 } 269 270 array_shift($this->ns_contexts); 271 272 $this->depth--; 273 274 if($name == ($this->NS . ':entry')) { 275 array_push($this->feed->entries, $this->current); 276 $this->current = null; 277 } 278 279 $this->_p("end_element('$name')"); 280 } 281 282 function start_ns($parser, $prefix, $uri) { 283 $this->_p("starting: " . $prefix . ":" . $uri); 284 array_push($this->ns_decls, array($prefix,$uri)); 285 } 286 287 function end_ns($parser, $prefix) { 288 $this->_p("ending: #" . $prefix . "#"); 289 } 290 291 function cdata($parser, $data) { 292 $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#"); 293 if(!empty($this->in_content)) { 294 array_push($this->in_content, $data); 295 } 296 } 297 298 function _default($parser, $data) { 299 # when does this gets called? 300 } 301 302 303 function ns_to_prefix($qname, $attr=false) { 304 # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div') 305 $components = split(":", $qname); 306 307 # grab the last one (e.g 'div') 308 $name = array_pop($components); 309 310 if(!empty($components)) { 311 # re-join back the namespace component 312 $ns = join(":",$components); 313 foreach($this->ns_contexts as $context) { 314 foreach($context as $mapping) { 315 if($mapping[1] == $ns && strlen($mapping[0]) > 0) { 316 return array($mapping, "$mapping[0]:$name"); 317 } 318 } 319 } 320 } 321 322 if($attr) { 323 return array(null, $name); 324 } else { 325 foreach($this->ns_contexts as $context) { 326 foreach($context as $mapping) { 327 if(strlen($mapping[0]) == 0) { 328 return array($mapping, $name); 329 } 330 } 331 } 332 } 333 } 334 335 function is_declared_content_ns($new_mapping) { 336 foreach($this->content_ns_contexts as $context) { 337 foreach($context as $mapping) { 338 if($new_mapping == $mapping) { 339 return true; 340 } 341 } 342 } 343 return false; 344 } 345 346 function xml_escape($string) 347 { 348 return str_replace(array('&','"',"'",'<','>'), 349 array('&','"',''','<','>'), 350 $string ); 351 } 352 }
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| Generated: Tue Mar 25 01:41:18 2014 | WordPress honlapkészítés: online1.hu |