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[CP] bugfix:54999006 compatibility of xmlns string parse in XML expr

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qijiax
2024-04-22 06:03:00 +00:00
committed by ob-robot
parent 9d616dfdfb
commit 54c98d2a93
1 changed files with 44 additions and 35 deletions
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79
src/sql/engine/expr/ob_expr_xml_func_helper.cpp
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@ -367,47 +367,56 @@ int ObXMLExprHelper::parse_namespace_str(ObString &ns_str, ObString &prefix, ObS
str[idx+3] == 'n' &&
str[idx+4] == 's') {
idx += 5;
if (str[idx] == ':') {
// parse prefix name
int64_t start = idx + 1;
while (idx < str_len && str[idx] != '=') ++idx;
if (idx < str_len && str[idx] == '=') {
prefix_start = str + start;
prefix_len = idx - start;
}
}
if (idx < str_len && str[idx] == '=') {
// parse uri value
idx += 1;
if (idx < str_len && str[idx] == '"') {
// "xxx"
int start = ++idx;
while(idx < str_len && str[idx] != '"') ++idx;
if (idx < str_len && str[idx] == '"') {
uri_start = str + start;
uri_len = idx - start;
idx += 1;
} else {
ret = OB_ERR_INVALID_XPATH_EXPRESSION;
LOG_WARN("not invalid xml namespace string", K(ret), K(ns_str), K(idx));
}
} else {
uri_start = str + idx;
uri_len = str_len - idx;
}
} else {
ret = OB_ERR_INVALID_XPATH_EXPRESSION;
LOG_WARN("not invalid xml namespace string", K(ret), K(ns_str), K(idx));
}
} else {
ret = OB_ERR_INVALID_XPATH_EXPRESSION;
LOG_WARN("not invalid xml namespace string", K(ret), K(ns_str), K(idx));
LOG_WARN("not invalid xmlns string", K(ret), K(ns_str));
}
// parse prefix name
if (OB_FAIL(ret)) {
} else if (idx < str_len && str[idx] == ':') {
idx += 1;
int64_t start = idx;
// find prefix name end
while (idx < str_len && str[idx] != '=') {
idx += 1;
}
prefix_start = str + start;
prefix_len = idx - start;
}
// parse uri value
if (OB_FAIL(ret)) {
} else if (idx < str_len && str[idx] == '=') {
idx += 1;
// skip the " in the front
while (idx < str_len && str[idx] == '"') {
idx += 1;
}
int64_t start = idx;
// find the value end
while (idx < str_len && str[idx] != '"') {
idx += 1;
}
uri_start = str + start;
uri_len = idx - start;
// skip the " in the end
while (idx < str_len && str[idx] == '"') {
idx += 1;
}
} else if (idx != str_len) {
ret = OB_ERR_INVALID_XPATH_EXPRESSION;
LOG_WARN("no \"=\" after xmlns or prefix name", K(ret), K(ns_str));
}
if (OB_SUCC(ret)) {
if (prefix_len > 0) {
if (OB_FAIL(ret)) {
} else if (prefix_len > 0) {
if (uri_len > 0) {
uri.assign_ptr(uri_start, uri_len);
prefix.assign_ptr(prefix_start, prefix_len);
} else {
ret = OB_ERR_INVALID_XPATH_EXPRESSION;
LOG_WARN("empty value after prefix name", K(ret), K(ns_str));
}
} else if (uri_len > 0) {
uri.assign_ptr(uri_start, uri_len);
}
return ret;