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Edit File : atomlib.php \| Size : 11.79 KB
<?php /** * Atom Syndication Format PHP Library * * @package AtomLib * @link http://code.google.com/p/phpatomlib/ * * @author Elias Torres <elias@torrez.us> * @version 0.4 * @since 2.3.0 / /* * Structure that store common Atom Feed Properties * * @package AtomLib / class AtomFeed { /* * Stores Links * @var array * @access public / var $links = array(); /* * Stores Categories * @var array * @access public / var $categories = array(); /* * Stores Entries * * @var array * @access public / var $entries = array(); } /* * Structure that store Atom Entry Properties * * @package AtomLib / class AtomEntry { /* * Stores Links * @var array * @access public / var $links = array(); /* * Stores Categories * @var array * @access public / var $categories = array(); } /* * AtomLib Atom Parser API * * @package AtomLib / class AtomParser { var $NS = 'http://www.w3.org/2005/Atom'; var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights'); var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft'); var $debug = false; var $depth = 0; var $indent = 2; var $in_content; var $ns_contexts = array(); var $ns_decls = array(); var $content_ns_decls = array(); var $content_ns_contexts = array(); var $is_xhtml = false; var $is_html = false; var $is_text = true; var $skipped_div = false; var $FILE = "php://input"; var $feed; var $current; var $map_attrs_func; var $map_xmlns_func; var $error; var $content; /* * PHP5 constructor. / function __construct() { $this->feed = new AtomFeed(); $this->current = null; $this->map_attrs_func = array( __CLASS__, 'map_attrs' ); $this->map_xmlns_func = array( __CLASS__, 'map_xmlns' ); } /* * PHP4 constructor. / public function AtomParser() { self::__construct(); } /* * Map attributes to key="val" * * @param string $k Key * @param string $v Value * @return string / public static function map_attrs($k, $v) { return "$k=\"$v\""; } /* * Map XML namespace to string. * * @param indexish $p XML Namespace element index * @param array $n Two-element array pair. [ 0 => {namespace}, 1 => {url} ] * @return string 'xmlns="{url}"' or 'xmlns:{namespace}="{url}"' / public static function map_xmlns($p, $n) { $xd = "xmlns"; if( 0 < strlen($n[0]) ) { $xd .= ":{$n[0]}"; } return "{$xd}=\"{$n[1]}\""; } function _p($msg) { if($this->debug) { print str_repeat(" ", $this->depth $this->indent) . $msg ."\n"; } } function error_handler($log_level, $log_text, $error_file, $error_line) { $this->error = $log_text; } function parse() { set_error_handler(array(&$this, 'error_handler')); array_unshift($this->ns_contexts, array()); if ( ! function_exists( 'xml_parser_create_ns' ) ) { trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) ); return false; } $parser = xml_parser_create_ns(); xml_set_element_handler($parser, array($this, "start_element"), array($this, "end_element")); xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0); xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0); xml_set_character_data_handler($parser, array($this, "cdata")); xml_set_default_handler($parser, array($this, "_default")); xml_set_start_namespace_decl_handler($parser, array($this, "start_ns")); xml_set_end_namespace_decl_handler($parser, array($this, "end_ns")); $this->content = ''; $ret = true; $fp = fopen($this->FILE, "r"); while ($data = fread($fp, 4096)) { if($this->debug) $this->content .= $data; if(!xml_parse($parser, $data, feof($fp))) { /* translators: 1: Error message, 2: Line number. / trigger_error(sprintf(__('XML Error: %1$s at line %2$s')."\n", xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser))); $ret = false; break; } } fclose($fp); xml_parser_free($parser); unset($parser); restore_error_handler(); return $ret; } function start_element($parser, $name, $attrs) { $name_parts = explode(":", $name); $tag = array_pop($name_parts); switch($name) { case $this->NS . ':feed': $this->current = $this->feed; break; case $this->NS . ':entry': $this->current = new AtomEntry(); break; }; $this->_p("start_element('$name')"); #$this->_p(print_r($this->ns_contexts,true)); #$this->_p('current(' . $this->current . ')'); array_unshift($this->ns_contexts, $this->ns_decls); $this->depth++; if(!empty($this->in_content)) { $this->content_ns_decls = array(); if($this->is_html \|\| $this->is_text) trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup."); $attrs_prefix = array(); // resolve prefixes for attributes foreach($attrs as $key => $value) { $with_prefix = $this->ns_to_prefix($key, true); $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value); } $attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix))); if(strlen($attrs_str) > 0) { $attrs_str = " " . $attrs_str; } $with_prefix = $this->ns_to_prefix($name); if(!$this->is_declared_content_ns($with_prefix[0])) { array_push($this->content_ns_decls, $with_prefix[0]); } $xmlns_str = ''; if(count($this->content_ns_decls) > 0) { array_unshift($this->content_ns_contexts, $this->content_ns_decls); $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0]))); if(strlen($xmlns_str) > 0) { $xmlns_str = " " . $xmlns_str; } } array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">")); } else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) \|\| in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) { $this->in_content = array(); $this->is_xhtml = $attrs['type'] == 'xhtml'; $this->is_html = $attrs['type'] == 'html' \|\| $attrs['type'] == 'text/html'; $this->is_text = !in_array('type',array_keys($attrs)) \|\| $attrs['type'] == 'text'; $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type'])); if(in_array('src',array_keys($attrs))) { $this->current->$tag = $attrs; } else { array_push($this->in_content, array($tag,$this->depth, $type)); } } else if($tag == 'link') { array_push($this->current->links, $attrs); } else if($tag == 'category') { array_push($this->current->categories, $attrs); } $this->ns_decls = array(); } function end_element($parser, $name) { $name_parts = explode(":", $name); $tag = array_pop($name_parts); $ccount = count($this->in_content); # if we are in* content, then let's proceed to serialize it if(!empty($this->in_content)) { # if we are ending the original content element # then let's finalize the content if($this->in_content[0][0] == $tag && $this->in_content[0][1] == $this->depth) { $origtype = $this->in_content[0][2]; array_shift($this->in_content); $newcontent = array(); foreach($this->in_content as $c) { if(count($c) == 3) { array_push($newcontent, $c[2]); } else { if($this->is_xhtml \|\| $this->is_text) { array_push($newcontent, $this->xml_escape($c)); } else { array_push($newcontent, $c); } } } if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) { $this->current->$tag = array($origtype, join('',$newcontent)); } else { $this->current->$tag = join('',$newcontent); } $this->in_content = array(); } else if($this->in_content[$ccount-1][0] == $tag && $this->in_content[$ccount-1][1] == $this->depth) { $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>"; } else { # else, just finalize the current element's content $endtag = $this->ns_to_prefix($name); array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>")); } } array_shift($this->ns_contexts); $this->depth--; if($name == ($this->NS . ':entry')) { array_push($this->feed->entries, $this->current); $this->current = null; } $this->_p("end_element('$name')"); } function start_ns($parser, $prefix, $uri) { $this->_p("starting: " . $prefix . ":" . $uri); array_push($this->ns_decls, array($prefix,$uri)); } function end_ns($parser, $prefix) { $this->_p("ending: #" . $prefix . "#"); } function cdata($parser, $data) { $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#"); if(!empty($this->in_content)) { array_push($this->in_content, $data); } } function _default($parser, $data) { # when does this gets called? } function ns_to_prefix($qname, $attr=false) { # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div') $components = explode(":", $qname); # grab the last one (e.g 'div') $name = array_pop($components); if(!empty($components)) { # re-join back the namespace component $ns = join(":",$components); foreach($this->ns_contexts as $context) { foreach($context as $mapping) { if($mapping[1] == $ns && strlen($mapping[0]) > 0) { return array($mapping, "$mapping[0]:$name"); } } } } if($attr) { return array(null, $name); } else { foreach($this->ns_contexts as $context) { foreach($context as $mapping) { if(strlen($mapping[0]) == 0) { return array($mapping, $name); } } } } } function is_declared_content_ns($new_mapping) { foreach($this->content_ns_contexts as $context) { foreach($context as $mapping) { if($new_mapping == $mapping) { return true; } } } return false; } function xml_escape($content) { return str_replace(array('&','"',"'",'<','>'), array('&','"',''','<','>'), $content ); } } Back

Edit File : atomlib.php | Size : 11.79 KB

<?php
/**
 * Atom Syndication Format PHP Library
 *
 * @package AtomLib
 * @link http://code.google.com/p/phpatomlib/
 *
 * @author Elias Torres <elias@torrez.us>
 * @version 0.4
 * @since 2.3.0
 */

/**
 * Structure that store common Atom Feed Properties
 *
 * @package AtomLib
 */
class AtomFeed {
	/**
	 * Stores Links
	 * @var array
	 * @access public
	 */
    var $links = array();
    /**
     * Stores Categories
     * @var array
     * @access public
     */
    var $categories = array();
	/**
	 * Stores Entries
	 *
	 * @var array
	 * @access public
	 */
    var $entries = array();
}

/**
 * Structure that store Atom Entry Properties
 *
 * @package AtomLib
 */
class AtomEntry {
	/**
	 * Stores Links
	 * @var array
	 * @access public
	 */
    var $links = array();
    /**
     * Stores Categories
     * @var array
	 * @access public
     */
    var $categories = array();
}

/**
 * AtomLib Atom Parser API
 *
 * @package AtomLib
 */
class AtomParser {

var $NS = 'http://www.w3.org/2005/Atom';
    var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights');
    var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft');

var $debug = false;

var $depth = 0;
    var $indent = 2;
    var $in_content;
    var $ns_contexts = array();
    var $ns_decls = array();
    var $content_ns_decls = array();
    var $content_ns_contexts = array();
    var $is_xhtml = false;
    var $is_html = false;
    var $is_text = true;
    var $skipped_div = false;

var $FILE = "php://input";

var $feed;
    var $current;
    var $map_attrs_func;
    var $map_xmlns_func;
    var $error;
    var $content;

/**
	 * PHP5 constructor.
	 */
    function __construct() {

$this->feed = new AtomFeed();
        $this->current = null;
        $this->map_attrs_func = array( __CLASS__, 'map_attrs' );
        $this->map_xmlns_func = array( __CLASS__, 'map_xmlns' );
    }

/**
	 * PHP4 constructor.
	 */
	public function AtomParser() {
		self::__construct();
	}

/**
	 * Map attributes to key="val"
	 *
	 * @param string $k Key
	 * @param string $v Value
	 * @return string
	 */
	public static function map_attrs($k, $v) {
		return "$k=\"$v\"";
	}

/**
	 * Map XML namespace to string.
	 *
	 * @param indexish $p XML Namespace element index
	 * @param array $n Two-element array pair. [ 0 => {namespace}, 1 => {url} ]
	 * @return string 'xmlns="{url}"' or 'xmlns:{namespace}="{url}"'
	 */
	public static function map_xmlns($p, $n) {
		$xd = "xmlns";
		if( 0 < strlen($n[0]) ) {
			$xd .= ":{$n[0]}";
		}
		return "{$xd}=\"{$n[1]}\"";
	}

function _p($msg) {
        if($this->debug) {
            print str_repeat(" ", $this->depth * $this->indent) . $msg ."\n";
        }
    }

function error_handler($log_level, $log_text, $error_file, $error_line) {
        $this->error = $log_text;
    }

function parse() {

set_error_handler(array(&$this, 'error_handler'));

array_unshift($this->ns_contexts, array());

if ( ! function_exists( 'xml_parser_create_ns' ) ) {
        	trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
        	return false;
        }

$parser = xml_parser_create_ns();
        xml_set_element_handler($parser, array($this, "start_element"), array($this, "end_element"));
        xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0);
        xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0);
        xml_set_character_data_handler($parser, array($this, "cdata"));
        xml_set_default_handler($parser, array($this, "_default"));
        xml_set_start_namespace_decl_handler($parser, array($this, "start_ns"));
        xml_set_end_namespace_decl_handler($parser, array($this, "end_ns"));

$this->content = '';

$ret = true;

$fp = fopen($this->FILE, "r");
        while ($data = fread($fp, 4096)) {
            if($this->debug) $this->content .= $data;

if(!xml_parse($parser, $data, feof($fp))) {
                /* translators: 1: Error message, 2: Line number. */
                trigger_error(sprintf(__('XML Error: %1$s at line %2$s')."\n",
                    xml_error_string(xml_get_error_code($parser)),
                    xml_get_current_line_number($parser)));
                $ret = false;
                break;
            }
        }
        fclose($fp);

xml_parser_free($parser);
        unset($parser);

restore_error_handler();

return $ret;
    }

function start_element($parser, $name, $attrs) {

$name_parts = explode(":", $name);
        $tag        = array_pop($name_parts);

switch($name) {
            case $this->NS . ':feed':
                $this->current = $this->feed;
                break;
            case $this->NS . ':entry':
                $this->current = new AtomEntry();
                break;
        };

$this->_p("start_element('$name')");
        #$this->_p(print_r($this->ns_contexts,true));
        #$this->_p('current(' . $this->current . ')');

array_unshift($this->ns_contexts, $this->ns_decls);

$this->depth++;

if(!empty($this->in_content)) {

$this->content_ns_decls = array();

if($this->is_html || $this->is_text)
                trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup.");

$attrs_prefix = array();

// resolve prefixes for attributes
            foreach($attrs as $key => $value) {
                $with_prefix = $this->ns_to_prefix($key, true);
                $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value);
            }

$attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix)));
            if(strlen($attrs_str) > 0) {
                $attrs_str = " " . $attrs_str;
            }

$with_prefix = $this->ns_to_prefix($name);

if(!$this->is_declared_content_ns($with_prefix[0])) {
                array_push($this->content_ns_decls, $with_prefix[0]);
            }

$xmlns_str = '';
            if(count($this->content_ns_decls) > 0) {
                array_unshift($this->content_ns_contexts, $this->content_ns_decls);
                $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0])));
                if(strlen($xmlns_str) > 0) {
                    $xmlns_str = " " . $xmlns_str;
                }
            }

array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">"));

} else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) || in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) {
            $this->in_content = array();
            $this->is_xhtml = $attrs['type'] == 'xhtml';
            $this->is_html = $attrs['type'] == 'html' || $attrs['type'] == 'text/html';
            $this->is_text = !in_array('type',array_keys($attrs)) || $attrs['type'] == 'text';
            $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type']));

if(in_array('src',array_keys($attrs))) {
                $this->current->$tag = $attrs;
            } else {
                array_push($this->in_content, array($tag,$this->depth, $type));
            }
        } else if($tag == 'link') {
            array_push($this->current->links, $attrs);
        } else if($tag == 'category') {
            array_push($this->current->categories, $attrs);
        }

$this->ns_decls = array();
    }

function end_element($parser, $name) {

$name_parts = explode(":", $name);
        $tag        = array_pop($name_parts);

$ccount = count($this->in_content);

# if we are *in* content, then let's proceed to serialize it
        if(!empty($this->in_content)) {
            # if we are ending the original content element
            # then let's finalize the content
            if($this->in_content[0][0] == $tag &&
                $this->in_content[0][1] == $this->depth) {
                $origtype = $this->in_content[0][2];
                array_shift($this->in_content);
                $newcontent = array();
                foreach($this->in_content as $c) {
                    if(count($c) == 3) {
                        array_push($newcontent, $c[2]);
                    } else {
                        if($this->is_xhtml || $this->is_text) {
                            array_push($newcontent, $this->xml_escape($c));
                        } else {
                            array_push($newcontent, $c);
                        }
                    }
                }
                if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) {
                    $this->current->$tag = array($origtype, join('',$newcontent));
                } else {
                    $this->current->$tag = join('',$newcontent);
                }
                $this->in_content = array();
            } else if($this->in_content[$ccount-1][0] == $tag &&
                $this->in_content[$ccount-1][1] == $this->depth) {
                $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>";
            } else {
                # else, just finalize the current element's content
                $endtag = $this->ns_to_prefix($name);
                array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>"));
            }
        }

array_shift($this->ns_contexts);

$this->depth--;

if($name == ($this->NS . ':entry')) {
            array_push($this->feed->entries, $this->current);
            $this->current = null;
        }

$this->_p("end_element('$name')");
    }

function start_ns($parser, $prefix, $uri) {
        $this->_p("starting: " . $prefix . ":" . $uri);
        array_push($this->ns_decls, array($prefix,$uri));
    }

function end_ns($parser, $prefix) {
        $this->_p("ending: #" . $prefix . "#");
    }

function cdata($parser, $data) {
        $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#");
        if(!empty($this->in_content)) {
            array_push($this->in_content, $data);
        }
    }

function _default($parser, $data) {
        # when does this gets called?
    }

function ns_to_prefix($qname, $attr=false) {
        # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div')
        $components = explode(":", $qname);

# grab the last one (e.g 'div')
        $name = array_pop($components);

if(!empty($components)) {
            # re-join back the namespace component
            $ns = join(":",$components);
            foreach($this->ns_contexts as $context) {
                foreach($context as $mapping) {
                    if($mapping[1] == $ns && strlen($mapping[0]) > 0) {
                        return array($mapping, "$mapping[0]:$name");
                    }
                }
            }
        }

if($attr) {
            return array(null, $name);
        } else {
            foreach($this->ns_contexts as $context) {
                foreach($context as $mapping) {
                    if(strlen($mapping[0]) == 0) {
                        return array($mapping, $name);
                    }
                }
            }
        }
    }

function is_declared_content_ns($new_mapping) {
        foreach($this->content_ns_contexts as $context) {
            foreach($context as $mapping) {
                if($new_mapping == $mapping) {
                    return true;
                }
            }
        }
        return false;
    }

function xml_escape($content)
    {
             return str_replace(array('&','"',"'",'<','>'),
                array('&amp;','&quot;','&apos;','&lt;','&gt;'),
                $content );
    }
}

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