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(Re-)Implement subprotocols in websocket server.

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This commit is contained in:
Fabio Alessandrelli 2019-07-08 07:33:36 +02:00
parent 06a4212377
commit 11452dcf91
2 changed files with 31 additions and 8 deletions
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33
modules/websocket/wsl_server.cpp
View file

@ -42,7 +42,7 @@ WSLServer::PendingPeer::PendingPeer() {
memset(req_buf, 0, sizeof(req_buf));
}
bool WSLServer::PendingPeer::_parse_request(String &r_key) {
bool WSLServer::PendingPeer::_parse_request(const PoolStringArray p_protocols) {
Vector<String> psa = String((char *)req_buf).split("\r\n");
int len = psa.size();
if (len < 4) {
@ -87,11 +87,29 @@ bool WSLServer::PendingPeer::_parse_request(String &r_key) {
_WLS_CHECK_EX("connection");
#undef _WLS_CHECK_EX
#undef _WLS_CHECK
r_key = headers["sec-websocket-key"];
key = headers["sec-websocket-key"];
if (headers.has("sec-websocket-protocol")) {
Vector<String> protos = headers["sec-websocket-protocol"].split(",");
for (int i = 0; i < protos.size(); i++) {
// Check if we have the given protocol
for (int j = 0; j < p_protocols.size(); j++) {
if (protos[i] != p_protocols[j])
continue;
protocol = protos[i];
break;
}
// Found a protocol
if (protocol != "")
break;
}
if (protocol == "") // Invalid protocol(s) requested
return false;
} else if (p_protocols.size() > 0) // No protocol requested, but we need one
return false;
return true;
}
Error WSLServer::PendingPeer::do_handshake() {
Error WSLServer::PendingPeer::do_handshake(PoolStringArray p_protocols) {
if (OS::get_singleton()->get_ticks_msec() - time > WSL_SERVER_TIMEOUT)
return ERR_TIMEOUT;
if (!has_request) {
@ -111,13 +129,15 @@ Error WSLServer::PendingPeer::do_handshake() {
int l = req_pos;
if (l > 3 && r[l] == '\n' && r[l - 1] == '\r' && r[l - 2] == '\n' && r[l - 3] == '\r') {
r[l - 3] = '\0';
if (!_parse_request(key)) {
if (!_parse_request(p_protocols)) {
return FAILED;
}
String s = "HTTP/1.1 101 Switching Protocols\r\n";
s += "Upgrade: websocket\r\n";
s += "Connection: Upgrade\r\n";
s += "Sec-WebSocket-Accept: " + WSLPeer::compute_key_response(key) + "\r\n";
if (protocol != "")
s += "Sec-WebSocket-Protocol: " + protocol + "\r\n";
s += "\r\n";
response = s.utf8();
has_request = true;
@ -143,6 +163,7 @@ Error WSLServer::listen(int p_port, PoolVector<String> p_protocols, bool gd_mp_a
ERR_FAIL_COND_V(is_listening(), ERR_ALREADY_IN_USE);
_is_multiplayer = gd_mp_api;
_protocols = p_protocols;
_server->listen(p_port);
return OK;
@ -167,7 +188,7 @@ void WSLServer::poll() {
List<Ref<PendingPeer> > remove_peers;
for (List<Ref<PendingPeer> >::Element *E = _pending.front(); E; E = E->next()) {
Ref<PendingPeer> ppeer = E->get();
Error err = ppeer->do_handshake();
Error err = ppeer->do_handshake(_protocols);
if (err == ERR_BUSY) {
continue;
} else if (err != OK) {
@ -188,7 +209,7 @@ void WSLServer::poll() {
_peer_map[id] = ws_peer;
remove_peers.push_back(ppeer);
_on_connect(id, "");
_on_connect(id, ppeer->protocol);
}
for (List<Ref<PendingPeer> >::Element *E = remove_peers.front(); E; E = E->next()) {
_pending.erase(E->get());

6
modules/websocket/wsl_server.h
View file

@ -49,7 +49,7 @@ private:
class PendingPeer : public Reference {
private:
bool _parse_request(String &r_key);
bool _parse_request(const PoolStringArray p_protocols);
public:
Ref<StreamPeer> connection;
@ -58,13 +58,14 @@ private:
uint8_t req_buf[WSL_MAX_HEADER_SIZE];
int req_pos;
String key;
String protocol;
bool has_request;
CharString response;
int response_sent;
PendingPeer();
Error do_handshake();
Error do_handshake(const PoolStringArray p_protocols);
};
int _in_buf_size;
@ -74,6 +75,7 @@ private:
List<Ref<PendingPeer> > _pending;
Ref<TCP_Server> _server;
PoolStringArray _protocols;
public:
Error set_buffers(int p_in_buffer, int p_in_packets, int p_out_buffer, int p_out_packets);