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match a wildcard only in the leftmost label in match_hostname (#2619)

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* match a wildcard only in the leftmost label in match_hostname

* Shorten the wildcard comment in match_hostname

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Co-authored-by: yhirose <yuji.hirose.bug@gmail.com>
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metsw24-maxandyhirose authored and GitHub committed 2026-10-08 12:47:24 -04:00
1 parent 00afaaed6a
commit 8f094fe292
5 files changed
+86 -3
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httplib.h
+4 -2
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@@ -10759,12 +10759,14 @@ inline bool match_hostname(const std::string &pattern,
// Compare each component with wildcard support
// Supports: "*" (full wildcard), "prefix*" (partial wildcard)
// https://bugs.launchpad.net/ubuntu/+source/firefox-3.0/+bug/376484
// Only the leftmost label may carry a wildcard (RFC 6125 6.4.3)
auto itr = pattern_components.begin();
for (const auto &h : host_components) {
auto &p = *itr;
if (!detail::case_ignore::equal(p, h) && p != "*") {
auto is_leftmost = itr == pattern_components.begin();
if (!detail::case_ignore::equal(p, h) && !(is_leftmost && p == "*")) {
bool partial_match = false;
if (!p.empty() && p[p.size() - 1] == '*') {
if (is_leftmost && !p.empty() && p[p.size() - 1] == '*') {
const auto prefix_length = p.size() - 1;
if (prefix_length == 0) {
partial_match = true;