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Fix #70962: xml_parse_into_struct strips embedded whitespace with XML… #7493

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Fix #70962: xml_parse_into_struct strips embedded whitespace with XML… #7493

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de9857f
Fix #70962: xml_parse_into_struct strips embedded whitespace with XML…
Sep 14, 2021
12c2f34
Fix according to PR comments.
Sep 15, 2021
75a2bcd
Ignore empty "cdata" elements.
Sep 15, 2021
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37 changes: 37 additions & 0 deletions ext/xml/tests/bug70962.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,37 @@
--TEST--
Bug #70962: xml_parse_into_struct strips embedded whitespace with XML_OPTION_SKIP_WHITE
--SKIPIF--
<?php
if (!extension_loaded('xml')) die('skip xml extension not available');
?>
--FILE--
<?php
function parseAndOutput($xml)
{
$parser = xml_parser_create();
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);

xml_parse_into_struct($parser, $xml, $values);

return $values;
}

$xml = "<a><b>&lt;d&gt;\n &lt;e&gt;</b><![CDATA[ ]]><c>\n \t</c></a>";

$parsed = parseAndOutput($xml);

// Check embedded whitespace is not getting skipped.
echo $parsed[1]['value'] . "\n";

// Check XML_OPTION_SKIP_WHITE ignores values of tags containing whitespace characters only.
var_dump(isset($parsed[2]['value']));

// Check XML_OPTION_SKIP_WHITE ignores empty <![CDATA[ ]]> values.
var_dump(count($parsed));

?>
--EXPECT--
<d>
<e>
bool(false)
int(4)
111 changes: 58 additions & 53 deletions ext/xml/xml.c
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Original file line number Diff line number Diff line change
Expand Up @@ -886,72 +886,77 @@ void _xml_characterDataHandler(void *userData, const XML_Char *s, int len)
zend_string *decoded_value;

decoded_value = xml_utf8_decode(s, len, parser->target_encoding);
for (i = 0; i < ZSTR_LEN(decoded_value); i++) {
switch (ZSTR_VAL(decoded_value)[i]) {
case ' ':
case '\t':
case '\n':
continue;
default:
doprint = 1;
if (parser->skipwhite) {
for (i = 0; i < ZSTR_LEN(decoded_value); i++) {
switch (ZSTR_VAL(decoded_value)[i]) {
case ' ':
case '\t':
case '\n':
continue;
default:
doprint = 1;
break;
}
if (doprint) {
break;
}
if (doprint) {
break;
}
}
}
if (doprint || (! parser->skipwhite)) {
if (parser->lastwasopen) {
zval *myval;

/* check if the current tag already has a value - if yes append to that! */
if ((myval = zend_hash_str_find(Z_ARRVAL_P(parser->ctag), "value", sizeof("value") - 1))) {
int newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
zend_string_release_ex(decoded_value, 0);
} else {

if (parser->lastwasopen) {
zval *myval;

/* check if the current tag already has a value - if yes append to that! */
if ((myval = zend_hash_str_find(Z_ARRVAL_P(parser->ctag), "value", sizeof("value") - 1))) {
size_t newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
zend_string_release_ex(decoded_value, 0);
} else {
if (doprint || (! parser->skipwhite)) {
add_assoc_str(parser->ctag, "value", decoded_value);
} else {
zend_string_release_ex(decoded_value, 0);
}
}

} else {
zval tag;
zval *curtag, *mytype, *myval;

ZEND_HASH_REVERSE_FOREACH_VAL(Z_ARRVAL(parser->data), curtag) {
if ((mytype = zend_hash_str_find(Z_ARRVAL_P(curtag),"type", sizeof("type") - 1))) {
if (!strcmp(Z_STRVAL_P(mytype), "cdata")) {
if ((myval = zend_hash_str_find(Z_ARRVAL_P(curtag), "value", sizeof("value") - 1))) {
int newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
zend_string_release_ex(decoded_value, 0);
return;
}
} else {
zval tag;
zval *curtag, *mytype, *myval;

ZEND_HASH_REVERSE_FOREACH_VAL(Z_ARRVAL(parser->data), curtag) {
if ((mytype = zend_hash_str_find(Z_ARRVAL_P(curtag),"type", sizeof("type") - 1))) {
if (!strcmp(Z_STRVAL_P(mytype), "cdata")) {
if ((myval = zend_hash_str_find(Z_ARRVAL_P(curtag), "value", sizeof("value") - 1))) {
int newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
zend_string_release_ex(decoded_value, 0);
return;
}
}
break;
} ZEND_HASH_FOREACH_END();
}
break;
} ZEND_HASH_FOREACH_END();

if (parser->level <= XML_MAXLEVEL && parser->level > 0) {
array_init(&tag);
if (parser->level <= XML_MAXLEVEL && parser->level > 0 && (doprint || (! parser->skipwhite))) {
array_init(&tag);

_xml_add_to_info(parser,SKIP_TAGSTART(parser->ltags[parser->level-1]));
_xml_add_to_info(parser,SKIP_TAGSTART(parser->ltags[parser->level-1]));

add_assoc_string(&tag, "tag", SKIP_TAGSTART(parser->ltags[parser->level-1]));
add_assoc_str(&tag, "value", decoded_value);
add_assoc_string(&tag, "type", "cdata");
add_assoc_long(&tag, "level", parser->level);
add_assoc_string(&tag, "tag", SKIP_TAGSTART(parser->ltags[parser->level-1]));
add_assoc_str(&tag, "value", decoded_value);
add_assoc_string(&tag, "type", "cdata");
add_assoc_long(&tag, "level", parser->level);

zend_hash_next_index_insert(Z_ARRVAL(parser->data), &tag);
} else if (parser->level == (XML_MAXLEVEL + 1)) {
php_error_docref(NULL, E_WARNING, "Maximum depth exceeded - Results truncated");
}
zend_hash_next_index_insert(Z_ARRVAL(parser->data), &tag);
} else if (parser->level == (XML_MAXLEVEL + 1)) {
php_error_docref(NULL, E_WARNING, "Maximum depth exceeded - Results truncated");
} else {
zend_string_release_ex(decoded_value, 0);
}
} else {
zend_string_release_ex(decoded_value, 0);
}
}
}
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