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3.0 KiB
3.0 KiB
A Fast and Easy to use microframework for the web.
Description
Crow is a C++ microframework for running web services. It uses routing similar to Python's Flask which makes it easy to use. It is also extremely fast, beating multiple existing C++ frameworks as well as non C++ frameworks.
Features
- Easy Routing (similar to flask).
- Type-safe Handlers.
- Blazingly fast (see this benchmark and this benchmark).
- Built in JSON support.
- Mustache based templating library (
crow::mustache). - Header only library (single header file available).
- Middleware support for extensions.
- HTTP/1.1 and Websocket support.
- Multi-part request and response support.
- Uses modern C++ (11/14)
Still in development
Documentation
Available here.
Examples
Hello World
#include "crow.h"
int main()
{
crow::SimpleApp app;
CROW_ROUTE(app, "/")([](){
return "Hello world";
});
app.port(18080).multithreaded().run();
}
JSON Response
CROW_ROUTE(app, "/json")
([]{
crow::json::wvalue x;
x["message"] = "Hello, World!";
return x;
});
Arguments
CROW_ROUTE(app,"/hello/<int>")
([](int count){
if (count > 100)
return crow::response(400);
std::ostringstream os;
os << count << " bottles of beer!";
return crow::response(os.str());
});
Handler arguments type check at compile time
// Compile error with message "Handler type is mismatched with URL paramters"
CROW_ROUTE(app,"/another/<int>")
([](int a, int b){
return crow::response(500);
});
Handling JSON Requests
CROW_ROUTE(app, "/add_json")
.methods("POST"_method)
([](const crow::request& req){
auto x = crow::json::load(req.body);
if (!x)
return crow::response(400);
int sum = x["a"].i()+x["b"].i();
std::ostringstream os;
os << sum;
return crow::response{os.str()};
});
More examples can be found here.
Setting Up / Building
Available here.