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#include "crow.h"
#include <sstream>
class ExampleLogHandler : public crow::ILogHandler {
public:
void log(std::string message, crow::LogLevel level) override {
// cerr << "ExampleLogHandler -> " << message;
}
};
struct ExampleMiddleware
{
std::string message;
ExampleMiddleware()
{
message = "foo";
}
void setMessage(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");
app.route_dynamic("/")
([]{
return "Hello World!";
});
app.route_dynamic("/about")
([](){
return "About Crow example.";
});
// a request to /path should be forwarded to /path/
app.route_dynamic("/path/")
([](){
return "Trailing slash test case..";
});
// simple json response
app.route_dynamic("/json")
([]{
crow::json::wvalue x;
x["message"] = "Hello, World!";
return x;
});
app.route_dynamic("/hello/<int>")
([](int count){
if (count > 100)
return crow::response(400);
std::ostringstream os;
os << count << " bottles of beer!";
return crow::response(os.str());
});
app.route_dynamic("/add/<int>/<int>")
([](const crow::request& req, 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
app.route_dynamic("/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 = boost::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();
}
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