+++ /dev/null
-<?php
-/*
- Data-oriented XML parsing code.
-*/
-
-
-#-- simplification wrapper around XML parser -------------------------------
-# namespace-aware, folds URIs down to expected xmlnamespace prefixes;
-# this is mostly handled internally, not by php-xml
-#
-class easy_xml {
-
- var $xp;
- var $xml;
-
- #-- general xmlns= mappings -> we don't want to deal with URIs
- # but get shortened abbreviations instead (and not unpredictable ones)
- var $xmlns = array(
- "http://www.w3.org/1999/02/22-rdf-syntax-ns#" => "rdf",
- "http://purl.org/dc/elements/1.1/" => "dc",
- "http://purl.org/rss/1.0/modules/wiki/" => "rss-wiki",
- "http://purl.org/rss/1.0/" => "rss", // (at least its similar enough)
- "http://purl.org/atom/ns#" => "atom",
- "DAV:" => "dav",
-#<eee># "urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/" => "ms-dav-time",
- "http://xmlns.com/foaf/0.1/" => "foaf",
- );
- #-- final xmlns= qualifier down-mapping,
- # think of this as "local xmlns:tag renaming"
- var $xmlns2;
-
- #-- tagname mappings
- var $map = array(
- //"xmlns-prefix:weird-tag-name" => "desired",
- );
-
- #-- tag name stack
- var $current, $parent, $stack=array();
-
-
- #-- prepare parser
- function easy_xml($xml="", $charset=NULL, $targetcoding="ISO-8859-1") {
-
- #-- init (no "_ns" parser, because we can handle that better)
- $this->xp = xml_parser_create($charset);
- xml_parser_set_option($this->xp, XML_OPTION_CASE_FOLDING, false);
- xml_parser_set_option($this->xp, XML_OPTION_SKIP_WHITE, true);
- xml_parser_set_option($this->xp, XML_OPTION_TARGET_ENCODING, $targetcoding);
- $this->xml = &$xml;
-
- #-- handlers
- xml_set_character_data_handler($this->xp, array(&$this,"cdata"));
- xml_set_element_handler($this->xp, array(&$this,"start"), array(&$this,"end"));
-
- #-- we take care of namespaces ourselves
- $this->xmlns2 = array();
- }
-
-
- #-- action
- function parse($more_xml="") {
- $r = xml_parse($this->xp, trim($this->xml . $more_xml), $_is_final=TRUE);
- if ($e = xml_get_error_code($this->xp)) {
- trigger_error("XML error #$e: " . xml_error_string($e), E_WARNING);
- }
- unset($this->xml);
- unset($this->stack);
- unset($this->current);
- unset($this->parent);
- unset($this->l);
- unset($this->map);
- unset($this->as_content);
- unset($this->as_list);
- $r = xml_parser_free($this->xp) && ($r);
- unset($this->xp);
- return($r);
- }
-
-
- #-- map ugly XMLNS urls to known identifiers/internal representation
- function tag($tag) {
- while (($l = strrpos($tag, ":"))
- and ($prefix = substr($tag, 0, $l))
- and (isset($this->xmlns2[$prefix])) )
- {
- $ns = $this->xmlns2[$prefix];
- if ($ns == $prefix) {
- break;
- }
-
- #-- strip known xmlns qualifier/moniker
- $tag = substr($tag, $l+1);
- if ($ns) {
- $tag = $ns . ":" . $tag;
- }
- else break;
- }
-
- #-- and also rewrite to preferred tag names
- if (isset($this->map[$tag])) {
- $tag = $this->map[$tag];
- }
-
- return($tag);
- }
-
-
- #-- log <opening> tags
- function start($xp, &$tag, &$attr) {
- #-- normalize attributes and discover namespaces
- if ($attr) {
- $a = array();
- foreach ($attr as $i=>$v) {
- if (strncmp($i, "xmlns:", 6) == 0) {
- $this->xmlns($xp, substr($i, 6), $v);
- }
- else {
- $i = $this->tag($i);
- $a[$i] = $v;
- }
- }
- $attr = $a;
- }
-
- #-- normalize tag names
- $tag = $this->tag($tag);
-
- #-- track where we are
- if ($this->current) {
- $this->stack[] = $this->current;
- }
- $this->parent = $this->current;
- $this->current = $tag;
- }
-
-
- #-- track </end> tags
- function end($xp, &$tag) {
- $tag = $this->tag($tag);
- $this->current = $this->parent;
- $this->parent = array_pop($this->stack);
- }
-
-
- #-- data extr
- function cdata($xp, $data) {
- }
-
-
- #-- we handle namespaces ourselves to decipher silly URIs and
- # get rid of uncommon prefixes
- function xmlns($xp, $short, $uri) {
- #-- setup back-mapping to OUR preferred xmlnamespace abbr
- if ($desired = $this->xmlns[$uri]) {
- if (($short != $desired)
- and (isset($this->xmlns2["rw:"][$short])
- or !isset($this->xmlns2[$short])) )
- {
- $this->xmlns2[$short] = $desired;
- $this->xmlns2["rw:"][$short] = 1; // mark as overwritable entry
- }
- // prevents 1:1-conversions
- }
- #-- keep it
- else {
- $this->xmlns[$uri] = $short; // log
- // $this->xmlns2[$short] = $short;
- }
- }
-
-
-}//class
-
-
-
-#-- simple data/array XML file --------------------------------------------
-# can decode only two-level data containers
-class easy_xml_data extends easy_xml {
-
- #-- which elements always to expect multiple times (= becomes list)
- var $as_list = array();
-
- #-- which attributes to transmove into cdata
- var $as_content = array();
-
-
- #-- append string data to collection
- function cdata($xp, $data) {
- if (trim($data)) {
- $this->l[$this->parent][$this->current] = $data;
- }
- }
-
-
- #-- extract single blocks from array collection list
- function end($xp, $tag) {
-
- parent::end($xp, $tag);
-
- if (isset($this->l[$tag])) {
- #-- make list
- if (isset($this->{$tag}) || in_array($tag, $this->as_list)) {
- #-- convert into list
- if (isset($this->{$tag}) && !isset($this->{$tag}[0])) {
- $this->{$tag} = array(
- 0 => $this->{$tag}
- );
- }
- $this->{$tag}[] = $this->l[$tag];
- }
- #-- no list (asis)
- else {
- $this->{$tag} = $this->l[$tag];
- }
- unset($this->l[$tag]);
- }
- }
-
-
- #-- converts certain expected tag attributes into cdata
- function start($xp, &$tag, &$attr) {
- parent::start($xp, $tag, $attr);
- foreach ($attr as $i=>$content) {
- if ($this->as_content[$tag]==$i) {
- $this->cdata($xp, $content);
- }
- }
- }
-
-}//class
-
-
-
-#-- special simplifications for RSS- and Atom- XML files --------------------
-class easy_xml_rss extends easy_xml_data {
-
- #-- add a few mappings to make RSS and Atom look similar
- function easy_xml_rss($xml, $cs=NULL, $tc="ISO-8859-1") {
- parent::easy_xml($xml, $cs, $tc);
- // kill some of _our_ namespace prefixes
- $this->xmlns2 += array(
-// "rss-wiki" => "",
- "rss" => "",
- "atom" => "",
- "dc" => "",
- );
- // rename tags (mainly for Atom)
- $this->map += array(
- // atom:
- "feed" => "channel",
- "entry" => "item",
- "content" => "description",
- "id" => "guid",
- // dc:
- "date" => "pubDate",
- );
- // tag attributes to auto-convert into content
- $this->as_content += array(
- "link"=>"href",
- );
- // always make list-array of items
- $this->as_list = array(
- "item",
- );
- }
-}//class
-
-
-
-
-#-- decode into structs (fast, but annoying to work with) ------------------
-class ewiki_xml_fast {
-
- var $data;
- var $tags;
-
- #-- do
- function parse() {
- xml_parse_into_struct($this->xp, $this->xml, $this->data, $this->tags);
-
- #-- fix xmlns, tag names
- $data = &$this->data;
- $tags = &$this->tags;
- foreach ($data as $i=>$d) {
- if ($new = $this->tag($data[$i]["tag"])) {
- $data[$i]["tag"] = $new;
- }
- if (isset($data[$i]["attributes"])) {
- foreach ($data[$i]["attributes"] as $key=>$val) {
- if ($new = ewiki_short_xmlns($key, $xmlns)) {
- unset($data[$i]["attributes"][$key]);
- $data[$i]["attributes"][$new] = $val;
- }
- }
- }
- }
- foreach ($tags as $key=>$val) {
- if ($new = $this->tag($key)) {
- unset($tags[$key]);
- $tags[$new] = $val;
- }
- }
-
- unset($this->xml);
- }
-}//class
-
-
-?>
\ No newline at end of file
projects / atutor.git / blobdiff