nghttpx: Add wildcard host routing
This change allows host pattern in --backend to include '*' to indicate wildcard match. The wildcard match is made in suffix match only.
This commit is contained in:
Tatsuhiro Tsujikawa
parent
94f52d49dc
commit
34d209b30b
26
src/shrpx.cc
26
src/shrpx.cc
|
|
@ -1227,8 +1227,14 @@ Connections:
|
|||
|
||||
Patterns with host take precedence over patterns with
|
||||
just path. Then, longer patterns take precedence over
|
||||
shorter ones, breaking a tie by the order of the
|
||||
appearance in the configuration.
|
||||
shorter ones.
|
||||
|
||||
Host can include "*" in the left most position to
|
||||
indicate wildcard match (only suffix match is done).
|
||||
For example, host pattern "*www.nghttp2.org" matches
|
||||
against "www.nghttp2.org" and "1www.ngttp2.org", but
|
||||
does not match against "nghttp2.org". The exact hosts
|
||||
match takes precedence over the wildcard hosts match.
|
||||
|
||||
If <PATTERN> is omitted or empty string, "/" is used as
|
||||
pattern, which matches all request paths (catch-all
|
||||
|
|
@ -2089,11 +2095,27 @@ void process_options(
|
|||
}
|
||||
catch_all.proto = proto;
|
||||
std::vector<DownstreamAddrGroupConfig>().swap(addr_groups);
|
||||
std::vector<WildcardPattern>().swap(mod_config()->wildcard_patterns);
|
||||
// maybe not necessary?
|
||||
mod_config()->router = Router();
|
||||
mod_config()->router.add_route(StringRef{catch_all.pattern},
|
||||
addr_groups.size());
|
||||
addr_groups.push_back(std::move(catch_all));
|
||||
} else {
|
||||
auto &wildcard_patterns = mod_config()->wildcard_patterns;
|
||||
std::sort(std::begin(wildcard_patterns), std::end(wildcard_patterns),
|
||||
[](const WildcardPattern &lhs, const WildcardPattern &rhs) {
|
||||
return std::lexicographical_compare(
|
||||
rhs.host.rbegin(), rhs.host.rend(), lhs.host.rbegin(),
|
||||
lhs.host.rend());
|
||||
});
|
||||
if (LOG_ENABLED(INFO)) {
|
||||
LOG(INFO) << "Reverse sorted wildcard hosts (compared from tail to head, "
|
||||
"and sorted in reverse order):";
|
||||
for (auto &wp : mod_config()->wildcard_patterns) {
|
||||
LOG(INFO) << wp.host;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (LOG_ENABLED(INFO)) {
|
||||
|
|
|
|||
|
|
@ -689,7 +689,7 @@ ClientHandler::get_downstream_connection(Downstream *downstream) {
|
|||
const auto &req = downstream->request();
|
||||
|
||||
// Fast path. If we have one group, it must be catch-all group.
|
||||
// HTTP/2 and client proxy modes fall in this case.
|
||||
// proxy mode falls in this case.
|
||||
if (groups.size() == 1) {
|
||||
group_idx = 0;
|
||||
} else if (req.method == HTTP_CONNECT) {
|
||||
|
|
@ -699,20 +699,20 @@ ClientHandler::get_downstream_connection(Downstream *downstream) {
|
|||
group_idx = catch_all;
|
||||
} else {
|
||||
auto &router = get_config()->router;
|
||||
auto &wildcard_patterns = get_config()->wildcard_patterns;
|
||||
if (!req.authority.empty()) {
|
||||
group_idx =
|
||||
match_downstream_addr_group(router, StringRef{req.authority},
|
||||
StringRef{req.path}, groups, catch_all);
|
||||
match_downstream_addr_group(router, wildcard_patterns, req.authority,
|
||||
req.path, groups, catch_all);
|
||||
} else {
|
||||
auto h = req.fs.header(http2::HD_HOST);
|
||||
if (h) {
|
||||
group_idx =
|
||||
match_downstream_addr_group(router, StringRef{h->value},
|
||||
StringRef{req.path}, groups, catch_all);
|
||||
group_idx = match_downstream_addr_group(
|
||||
router, wildcard_patterns, h->value, req.path, groups, catch_all);
|
||||
} else {
|
||||
group_idx =
|
||||
match_downstream_addr_group(router, StringRef::from_lit(""),
|
||||
StringRef{req.path}, groups, catch_all);
|
||||
match_downstream_addr_group(router, wildcard_patterns, StringRef{},
|
||||
req.path, groups, catch_all);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -648,7 +648,32 @@ int parse_mapping(const DownstreamAddrConfig &addr,
|
|||
g.addrs.push_back(addr);
|
||||
g.proto = proto;
|
||||
|
||||
if (pattern[0] == '*') {
|
||||
// wildcard pattern
|
||||
auto path_first =
|
||||
std::find(std::begin(g.pattern), std::end(g.pattern), '/');
|
||||
|
||||
auto host = StringRef{std::begin(g.pattern) + 1, path_first};
|
||||
auto path = StringRef{path_first, std::end(g.pattern)};
|
||||
|
||||
auto &wildcard_patterns = mod_config()->wildcard_patterns;
|
||||
|
||||
auto it = std::find_if(
|
||||
std::begin(wildcard_patterns), std::end(wildcard_patterns),
|
||||
[&host](const WildcardPattern &wp) { return wp.host == host; });
|
||||
|
||||
if (it == std::end(wildcard_patterns)) {
|
||||
mod_config()->wildcard_patterns.push_back(
|
||||
{ImmutableString{std::begin(host), std::end(host)}});
|
||||
|
||||
auto &router = mod_config()->wildcard_patterns.back().router;
|
||||
router.add_route(path, addr_groups.size());
|
||||
} else {
|
||||
(*it).router.add_route(path, addr_groups.size());
|
||||
}
|
||||
} else {
|
||||
mod_config()->router.add_route(StringRef{g.pattern}, addr_groups.size());
|
||||
}
|
||||
|
||||
addr_groups.push_back(std::move(g));
|
||||
}
|
||||
|
|
|
|||
|
|
@ -577,8 +577,17 @@ struct ConnectionConfig {
|
|||
} downstream;
|
||||
};
|
||||
|
||||
// Wildcard host pattern routing. We strips left most '*' from host
|
||||
// field. router includes all path pattern sharing same wildcard
|
||||
// host.
|
||||
struct WildcardPattern {
|
||||
ImmutableString host;
|
||||
Router router;
|
||||
};
|
||||
|
||||
struct Config {
|
||||
Router router;
|
||||
std::vector<WildcardPattern> wildcard_patterns;
|
||||
HttpProxy downstream_http_proxy;
|
||||
HttpConfig http;
|
||||
Http2Config http2;
|
||||
|
|
|
|||
|
|
@ -290,7 +290,8 @@ ConnectBlocker *Worker::get_connect_blocker() const {
|
|||
|
||||
namespace {
|
||||
size_t match_downstream_addr_group_host(
|
||||
const Router &router, const StringRef &host, const StringRef &path,
|
||||
const Router &router, const std::vector<WildcardPattern> &wildcard_patterns,
|
||||
const StringRef &host, const StringRef &path,
|
||||
const std::vector<DownstreamAddrGroup> &groups, size_t catch_all) {
|
||||
if (path.empty() || path[0] != '/') {
|
||||
auto group = router.match(host, StringRef::from_lit("/"));
|
||||
|
|
@ -318,6 +319,24 @@ size_t match_downstream_addr_group_host(
|
|||
return group;
|
||||
}
|
||||
|
||||
for (auto it = std::begin(wildcard_patterns);
|
||||
it != std::end(wildcard_patterns); ++it) {
|
||||
if (!util::ends_with(std::begin(host), std::end(host),
|
||||
std::begin((*it).host), std::end((*it).host))) {
|
||||
continue;
|
||||
}
|
||||
auto group = (*it).router.match(StringRef{}, path);
|
||||
if (group != -1) {
|
||||
// We sorted wildcard_patterns in a way that first match is the
|
||||
// longest host pattern.
|
||||
if (LOG_ENABLED(INFO)) {
|
||||
LOG(INFO) << "Found wildcard pattern with query " << host << path
|
||||
<< ", matched pattern=" << groups[group].pattern;
|
||||
}
|
||||
return group;
|
||||
}
|
||||
}
|
||||
|
||||
group = router.match(StringRef::from_lit(""), path);
|
||||
if (group != -1) {
|
||||
if (LOG_ENABLED(INFO)) {
|
||||
|
|
@ -335,7 +354,8 @@ size_t match_downstream_addr_group_host(
|
|||
} // namespace
|
||||
|
||||
size_t match_downstream_addr_group(
|
||||
const Router &router, const StringRef &hostport, const StringRef &raw_path,
|
||||
const Router &router, const std::vector<WildcardPattern> &wildcard_patterns,
|
||||
const StringRef &hostport, const StringRef &raw_path,
|
||||
const std::vector<DownstreamAddrGroup> &groups, size_t catch_all) {
|
||||
if (std::find(std::begin(hostport), std::end(hostport), '/') !=
|
||||
std::end(hostport)) {
|
||||
|
|
@ -349,11 +369,11 @@ size_t match_downstream_addr_group(
|
|||
auto path = StringRef{std::begin(raw_path), query};
|
||||
|
||||
if (hostport.empty()) {
|
||||
return match_downstream_addr_group_host(router, hostport, path, groups,
|
||||
catch_all);
|
||||
return match_downstream_addr_group_host(router, wildcard_patterns, hostport,
|
||||
path, groups, catch_all);
|
||||
}
|
||||
|
||||
std::string host;
|
||||
StringRef host;
|
||||
if (hostport[0] == '[') {
|
||||
// assume this is IPv6 numeric address
|
||||
auto p = std::find(std::begin(hostport), std::end(hostport), ']');
|
||||
|
|
@ -363,18 +383,25 @@ size_t match_downstream_addr_group(
|
|||
if (p + 1 < std::end(hostport) && *(p + 1) != ':') {
|
||||
return catch_all;
|
||||
}
|
||||
host.assign(std::begin(hostport), p + 1);
|
||||
host = StringRef{std::begin(hostport), p + 1};
|
||||
} else {
|
||||
auto p = std::find(std::begin(hostport), std::end(hostport), ':');
|
||||
if (p == std::begin(hostport)) {
|
||||
return catch_all;
|
||||
}
|
||||
host.assign(std::begin(hostport), p);
|
||||
host = StringRef{std::begin(hostport), p};
|
||||
}
|
||||
|
||||
util::inp_strlower(host);
|
||||
return match_downstream_addr_group_host(router, StringRef{host}, path, groups,
|
||||
catch_all);
|
||||
std::string low_host;
|
||||
if (std::find_if(std::begin(host), std::end(host), [](char c) {
|
||||
return 'A' <= c || c <= 'Z';
|
||||
}) != std::end(host)) {
|
||||
low_host = host.str();
|
||||
util::inp_strlower(low_host);
|
||||
host = StringRef{low_host};
|
||||
}
|
||||
return match_downstream_addr_group_host(router, wildcard_patterns, host, path,
|
||||
groups, catch_all);
|
||||
}
|
||||
|
||||
} // namespace shrpx
|
||||
|
|
|
|||
|
|
@ -206,7 +206,8 @@ private:
|
|||
// group. The catch-all group index is given in |catch_all|. All
|
||||
// patterns are given in |groups|.
|
||||
size_t match_downstream_addr_group(
|
||||
const Router &router, const StringRef &hostport, const StringRef &path,
|
||||
const Router &router, const std::vector<WildcardPattern> &wildcard_patterns,
|
||||
const StringRef &hostport, const StringRef &path,
|
||||
const std::vector<DownstreamAddrGroup> &groups, size_t catch_all);
|
||||
|
||||
} // namespace shrpx
|
||||
|
|
|
|||
|
|
@ -43,7 +43,7 @@ void test_shrpx_worker_match_downstream_addr_group(void) {
|
|||
"nghttp2.org/alpha/charlie", "nghttp2.org/delta%3A",
|
||||
"www.nghttp2.org/", "[::1]/", "nghttp2.org/alpha/bravo/delta",
|
||||
// Check that match is done in the single node
|
||||
"example.com/alpha/bravo", "192.168.0.1/alpha/"}) {
|
||||
"example.com/alpha/bravo", "192.168.0.1/alpha/", "/golf/"}) {
|
||||
groups.push_back(DownstreamAddrGroup{ImmutableString(s)});
|
||||
}
|
||||
|
||||
|
|
@ -54,126 +54,163 @@ void test_shrpx_worker_match_downstream_addr_group(void) {
|
|||
router.add_route(StringRef{g.pattern}, i);
|
||||
}
|
||||
|
||||
std::vector<WildcardPattern> wp;
|
||||
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
// port is removed
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org:8080"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org:8080"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
// host is case-insensitive
|
||||
CU_ASSERT(4 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("WWW.nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("WWW.nghttp2.org"),
|
||||
StringRef::from_lit("/alpha"), groups, 255));
|
||||
|
||||
CU_ASSERT(1 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/bravo/"), groups, 255));
|
||||
|
||||
// /alpha/bravo also matches /alpha/bravo/
|
||||
CU_ASSERT(1 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/bravo"), groups, 255));
|
||||
|
||||
// path part is case-sensitive
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/Alpha/bravo"), groups, 255));
|
||||
|
||||
CU_ASSERT(1 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/bravo/charlie"), groups, 255));
|
||||
|
||||
CU_ASSERT(2 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/charlie"), groups, 255));
|
||||
|
||||
// pattern which does not end with '/' must match its entirely. So
|
||||
// this matches to group 0, not group 2.
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/charlie/"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("example.org"),
|
||||
router, wp, StringRef::from_lit("example.org"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(router, StringRef::from_lit(""),
|
||||
StringRef::from_lit("/"), groups,
|
||||
255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(router, StringRef::from_lit(""),
|
||||
StringRef::from_lit("alpha"),
|
||||
groups, 255));
|
||||
|
||||
CU_ASSERT(255 ==
|
||||
match_downstream_addr_group(router, StringRef::from_lit("foo/bar"),
|
||||
match_downstream_addr_group(router, wp, StringRef::from_lit(""),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit(""),
|
||||
StringRef::from_lit("alpha"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("foo/bar"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
// If path is StringRef::from_lit("*", only match with host + "/").
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("*"), groups, 255));
|
||||
|
||||
CU_ASSERT(5 ==
|
||||
match_downstream_addr_group(router, StringRef::from_lit("[::1]"),
|
||||
CU_ASSERT(
|
||||
5 == match_downstream_addr_group(router, wp, StringRef::from_lit("[::1]"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
CU_ASSERT(5 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("[::1]:8080"),
|
||||
router, wp, StringRef::from_lit("[::1]:8080"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
CU_ASSERT(255 ==
|
||||
match_downstream_addr_group(router, StringRef::from_lit("[::1"),
|
||||
match_downstream_addr_group(router, wp, StringRef::from_lit("[::1"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("[::1]8000"),
|
||||
router, wp, StringRef::from_lit("[::1]8000"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
// Check the case where adding route extends tree
|
||||
CU_ASSERT(6 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/bravo/delta"), groups, 255));
|
||||
|
||||
CU_ASSERT(1 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("nghttp2.org"),
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/alpha/bravo/delta/"), groups, 255));
|
||||
|
||||
// Check the case where query is done in a single node
|
||||
CU_ASSERT(7 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("example.com"),
|
||||
router, wp, StringRef::from_lit("example.com"),
|
||||
StringRef::from_lit("/alpha/bravo"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("example.com"),
|
||||
router, wp, StringRef::from_lit("example.com"),
|
||||
StringRef::from_lit("/alpha/bravo/"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("example.com"),
|
||||
router, wp, StringRef::from_lit("example.com"),
|
||||
StringRef::from_lit("/alpha"), groups, 255));
|
||||
|
||||
// Check the case where quey is done in a single node
|
||||
CU_ASSERT(8 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("192.168.0.1"),
|
||||
router, wp, StringRef::from_lit("192.168.0.1"),
|
||||
StringRef::from_lit("/alpha"), groups, 255));
|
||||
|
||||
CU_ASSERT(8 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("192.168.0.1"),
|
||||
router, wp, StringRef::from_lit("192.168.0.1"),
|
||||
StringRef::from_lit("/alpha/"), groups, 255));
|
||||
|
||||
CU_ASSERT(8 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("192.168.0.1"),
|
||||
router, wp, StringRef::from_lit("192.168.0.1"),
|
||||
StringRef::from_lit("/alpha/bravo"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("192.168.0.1"),
|
||||
router, wp, StringRef::from_lit("192.168.0.1"),
|
||||
StringRef::from_lit("/alph"), groups, 255));
|
||||
|
||||
CU_ASSERT(255 == match_downstream_addr_group(
|
||||
router, StringRef::from_lit("192.168.0.1"),
|
||||
router, wp, StringRef::from_lit("192.168.0.1"),
|
||||
StringRef::from_lit("/"), groups, 255));
|
||||
|
||||
router.dump();
|
||||
// Test for wildcard hosts
|
||||
groups.push_back(
|
||||
DownstreamAddrGroup{ImmutableString::from_lit("git.nghttp2.org")});
|
||||
groups.push_back(
|
||||
DownstreamAddrGroup{ImmutableString::from_lit(".nghttp2.org")});
|
||||
|
||||
wp.push_back({ImmutableString("git.nghttp2.org")});
|
||||
wp.back().router.add_route(StringRef::from_lit("/echo/"), 10);
|
||||
|
||||
wp.push_back({ImmutableString(".nghttp2.org")});
|
||||
wp.back().router.add_route(StringRef::from_lit("/echo/"), 11);
|
||||
wp.back().router.add_route(StringRef::from_lit("/echo/foxtrot"), 12);
|
||||
|
||||
CU_ASSERT(10 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("git.nghttp2.org"),
|
||||
StringRef::from_lit("/echo"), groups, 255));
|
||||
|
||||
CU_ASSERT(10 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("0git.nghttp2.org"),
|
||||
StringRef::from_lit("/echo"), groups, 255));
|
||||
|
||||
CU_ASSERT(11 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("it.nghttp2.org"),
|
||||
StringRef::from_lit("/echo"), groups, 255));
|
||||
|
||||
CU_ASSERT(12 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit(".nghttp2.org"),
|
||||
StringRef::from_lit("/echo/foxtrot"), groups, 255));
|
||||
|
||||
CU_ASSERT(9 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("alpha.nghttp2.org"),
|
||||
StringRef::from_lit("/golf"), groups, 255));
|
||||
|
||||
CU_ASSERT(0 == match_downstream_addr_group(
|
||||
router, wp, StringRef::from_lit("nghttp2.org"),
|
||||
StringRef::from_lit("/echo"), groups, 255));
|
||||
}
|
||||
|
||||
} // namespace shrpx
|
||||
|
|
|
|||
|
|
@ -250,6 +250,7 @@ public:
|
|||
using const_reference = const value_type &;
|
||||
using const_pointer = const value_type *;
|
||||
using const_iterator = const_pointer;
|
||||
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
|
||||
|
||||
ImmutableString() : len(0), base("") {}
|
||||
ImmutableString(const char *s, size_t slen)
|
||||
|
|
@ -308,6 +309,16 @@ public:
|
|||
const_iterator end() const { return base + len; };
|
||||
const_iterator cend() const { return base + len; };
|
||||
|
||||
const_reverse_iterator rbegin() const {
|
||||
return const_reverse_iterator{base + len};
|
||||
}
|
||||
const_reverse_iterator crbegin() const {
|
||||
return const_reverse_iterator{base + len};
|
||||
}
|
||||
|
||||
const_reverse_iterator rend() const { return const_reverse_iterator{base}; }
|
||||
const_reverse_iterator crend() const { return const_reverse_iterator{base}; }
|
||||
|
||||
const char *c_str() const { return base; }
|
||||
size_type size() const { return len; }
|
||||
bool empty() const { return len == 0; }
|
||||
|
|
@ -395,6 +406,7 @@ public:
|
|||
using const_reference = const value_type &;
|
||||
using const_pointer = const value_type *;
|
||||
using const_iterator = const_pointer;
|
||||
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
|
||||
|
||||
constexpr StringRef() : base(""), len(0) {}
|
||||
explicit StringRef(const std::string &s) : base(s.c_str()), len(s.size()) {}
|
||||
|
|
@ -430,6 +442,16 @@ public:
|
|||
const_iterator end() const { return base + len; };
|
||||
const_iterator cend() const { return base + len; };
|
||||
|
||||
const_reverse_iterator rbegin() const {
|
||||
return const_reverse_iterator{base + len};
|
||||
}
|
||||
const_reverse_iterator crbegin() const {
|
||||
return const_reverse_iterator{base + len};
|
||||
}
|
||||
|
||||
const_reverse_iterator rend() const { return const_reverse_iterator{base}; }
|
||||
const_reverse_iterator crend() const { return const_reverse_iterator{base}; }
|
||||
|
||||
const char *c_str() const { return base; }
|
||||
size_type size() const { return len; }
|
||||
bool empty() const { return len == 0; }
|
||||
|
|
@ -464,6 +486,15 @@ inline bool operator==(const StringRef &lhs, const char *rhs) {
|
|||
std::equal(std::begin(lhs), std::end(lhs), rhs);
|
||||
}
|
||||
|
||||
inline bool operator==(const StringRef &lhs, const ImmutableString &rhs) {
|
||||
return lhs.size() == rhs.size() &&
|
||||
std::equal(std::begin(lhs), std::end(lhs), std::begin(rhs));
|
||||
}
|
||||
|
||||
inline bool operator==(const ImmutableString &lhs, const StringRef &rhs) {
|
||||
return rhs == lhs;
|
||||
}
|
||||
|
||||
inline bool operator==(const char *lhs, const StringRef &rhs) {
|
||||
return rhs == lhs;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue