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/* We simply call the root header file "App.h", giving you uWS::App and uWS::SSLApp */
#include "App.h"
/* This is a simple WebSocket "sync" upgrade example.
* You may compile it with "WITH_OPENSSL=1 make" or with "make" */
int main() {
/* ws->getUserData returns one of these */
struct PerSocketData {
/* Define your user data */
int something;
};
/* Keep in mind that uWS::SSLApp({options}) is the same as uWS::App() when compiled without SSL support.
* You may swap to using uWS:App() if you don't need SSL */
uWS::SSLApp({
/* There are example certificates in uWebSockets.js repo */
.key_file_name = "misc/key.pem",
.cert_file_name = "misc/cert.pem",
.passphrase = "1234"
}).ws<PerSocketData>("/*", {
/* Settings */
.compression = uWS::SHARED_COMPRESSOR,
.maxPayloadLength = 16 * 1024,
.idleTimeout = 10,
.maxBackpressure = 1 * 1024 * 1024,
/* Handlers */
.upgrade = [](auto *res, auto *req, auto *context) {
/* You may read from req only here, and COPY whatever you need into your PerSocketData.
* PerSocketData is valid from .open to .close event, accessed with ws->getUserData().
* HttpRequest (req) is ONLY valid in this very callback, so any data you will need later
* has to be COPIED into PerSocketData here. */
/* Immediately upgrading without doing anything "async" before, is simple */
res->template upgrade<PerSocketData>({
/* We initialize PerSocketData struct here */
.something = 13
}, req->getHeader("sec-websocket-key"),
req->getHeader("sec-websocket-protocol"),
req->getHeader("sec-websocket-extensions"),
context);
/* If you don't want to upgrade you can instead respond with custom HTTP here,
* such as res->writeStatus(...)->writeHeader(...)->end(...); or similar.*/
/* Performing async upgrade, such as checking with a database is a little more complex;
* see UpgradeAsync example instead. */
},
.open = [](auto *ws) {
/* Open event here, you may access ws->getUserData() which points to a PerSocketData struct.
* Here we simply validate that indeed, something == 13 as set in upgrade handler. */
std::cout << "Something is: " << static_cast<PerSocketData *>(ws->getUserData())->something << std::endl;
},
.message = [](auto *ws, std::string_view message, uWS::OpCode opCode) {
/* We simply echo whatever data we get */
ws->send(message, opCode);
},
.drain = [](auto */*ws*/) {
/* Check ws->getBufferedAmount() here */
},
.ping = [](auto */*ws*/, std::string_view) {
/* You don't need to handle this one, we automatically respond to pings as per standard */
},
.pong = [](auto */*ws*/, std::string_view) {
/* You don't need to handle this one either */
},
.close = [](auto */*ws*/, int /*code*/, std::string_view /*message*/) {
/* You may access ws->getUserData() here, but sending or
* doing any kind of I/O with the socket is not valid. */
}
}).listen(9001, [](auto *listen_socket) {
if (listen_socket) {
std::cout << "Listening on port " << 9001 << std::endl;
}
}).run();
}
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