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Copy pathexample_vs.cpp
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130 lines (110 loc) · 3.25 KB
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#include "crow.h"
class ExampleLogHandler : public crow::ILogHandler
{
public:
void log(const std::string & message, crow::LogLevel level) override
{
// cerr << "ExampleLogHandler -> " << message;
}
};
struct ExampleMiddleware
{
std::string message;
ExampleMiddleware():
message("foo")
{
}
void setMessage(const std::string& newMsg)
{
message = newMsg;
}
struct context
{};
void before_handle(crow::request& req, crow::response& res, context& ctx)
{
CROW_LOG_DEBUG << " - MESSAGE: " << message;
}
void after_handle(crow::request& req, crow::response& res, context& ctx)
{
// no-op
}
};
int main()
{
crow::App<ExampleMiddleware> app;
app.get_middleware<ExampleMiddleware>().setMessage("hello");
CROW_ROUTE(app, "/")
.name("hello")([] {
return "Hello World!";
});
CROW_ROUTE(app, "/about")
([]() {
return "About Crow example.";
});
// a request to /path should be forwarded to /path/
CROW_ROUTE(app, "/path/")
([]() {
return "Trailing slash test case..";
});
// simple json response
CROW_ROUTE(app, "/json")
([] {
crow::json::wvalue x;
x["message"] = "Hello, World!";
return x;
});
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());
});
CROW_ROUTE(app, "/add/<int>/<int>")
([](crow::response& res, int a, int b) {
std::ostringstream os;
os << a + b;
res.write(os.str());
res.end();
});
// Compile error with message "Handler type is mismatched with URL paramters"
//CROW_ROUTE(app,"/another/<int>")
//([](int a, int b){
//return crow::response(500);
//});
// more json example
CROW_ROUTE(app, "/add_json")
.methods(crow::HTTPMethod::Post)([](const crow::request& req) {
auto x = crow::json::load(req.body);
if (!x)
return crow::response(400);
auto sum = x["a"].i() + x["b"].i();
std::ostringstream os;
os << sum;
return crow::response{os.str()};
});
app.route_dynamic("/params")([](const crow::request& req) {
std::ostringstream os;
os << "Params: " << req.url_params << "\n\n";
os << "The key 'foo' was " << (req.url_params.get("foo") == nullptr ? "not " : "") << "found.\n";
if (req.url_params.get("pew") != nullptr)
{
double countD = crow::utility::lexical_cast<double>(req.url_params.get("pew"));
os << "The value of 'pew' is " << countD << '\n';
}
auto count = req.url_params.get_list("count");
os << "The key 'count' contains " << count.size() << " value(s).\n";
for (const auto& countVal : count)
{
os << " - " << countVal << '\n';
}
return crow::response{os.str()};
});
// ignore all log
crow::logger::setLogLevel(crow::LogLevel::Debug);
//crow::logger::setHandler(std::make_shared<ExampleLogHandler>());
app.port(18080)
.multithreaded()
.run();
}