123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
#include "crow_all.h"
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class ExampleLogHandler : public crow::ILogHandler
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{
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public:
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void log(std::string /*message*/, crow::LogLevel /*level*/) override
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{
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// cerr << "ExampleLogHandler -> " << message;
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}
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};
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int main()
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{
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crow::SimpleApp app;
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CROW_ROUTE(app, "/")
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.name("hello")([] {
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return "Hello World!";
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});
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CROW_ROUTE(app, "/about")
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([]() {
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return "About Crow example.";
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});
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// simple json response
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CROW_ROUTE(app, "/json")
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([] {
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crow::json::wvalue x({{"message", "Hello, World!"}});
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x["message2"] = "Hello, World.. Again!";
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return x;
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});
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CROW_ROUTE(app, "/json-initializer-list-constructor")
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([] {
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crow::json::wvalue r({
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{"first", "Hello world!"}, /* stores a char const* hence a json::type::String */
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{"second", std::string("How are you today?")}, /* stores a std::string hence a json::type::String. */
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{"third", 54}, /* stores an int (as 54 is an int literal) hence a std::int64_t. */
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{"fourth", (int64_t)54l}, /* stores a long (as 54l is a long literal) hence a std::int64_t. */
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{"fifth", 54u}, /* stores an unsigned int (as 54u is a unsigned int literal) hence a std::uint64_t. */
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{"sixth", (uint64_t)54ul}, /* stores an unsigned long (as 54ul is an unsigned long literal) hence a std::uint64_t. */
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{"seventh", 2.f}, /* stores a float (as 2.f is a float literal) hence a double. */
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{"eighth", 2.}, /* stores a double (as 2. is a double literal) hence a double. */
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{"ninth", nullptr}, /* stores a std::nullptr hence json::type::Null . */
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{"tenth", true} /* stores a bool hence json::type::True . */
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});
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return r;
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});
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// json list response
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CROW_ROUTE(app, "/json_list")
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([] {
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crow::json::wvalue x(crow::json::wvalue::list({1, 2, 3}));
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return x;
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});
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CROW_ROUTE(app, "/hello/<int>")
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([](int count) {
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if (count > 100)
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return crow::response(400);
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std::ostringstream os;
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os << count << " bottles of beer!";
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return crow::response(os.str());
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});
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// example which uses only response as a paramter without
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// request being a parameter.
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CROW_ROUTE(app, "/add/<int>/<int>")
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([](crow::response& res, int a, int b) {
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std::ostringstream os;
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os << a + b;
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res.write(os.str());
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res.end();
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});
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// Compile error with message "Handler type is mismatched with URL paramters"
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//CROW_ROUTE(app,"/another/<int>")
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//([](int a, int b){
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//return crow::response(500);
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//});
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// more json example
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CROW_ROUTE(app, "/add_json")
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.methods("POST"_method)([](const crow::request& req) {
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auto x = crow::json::load(req.body);
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if (!x)
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return crow::response(400);
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int sum = x["a"].i() + x["b"].i();
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std::ostringstream os;
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os << sum;
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return crow::response{os.str()};
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});
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CROW_ROUTE(app, "/params")
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([](const crow::request& req) {
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std::ostringstream os;
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os << "Params: " << req.url_params << "\n\n";
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os << "The key 'foo' was " << (req.url_params.get("foo") == nullptr ? "not " : "") << "found.\n";
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if (req.url_params.get("pew") != nullptr)
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{
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double countD = crow::utility::lexical_cast<double>(req.url_params.get("pew"));
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os << "The value of 'pew' is " << countD << '\n';
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}
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auto count = req.url_params.get_list("count");
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os << "The key 'count' contains " << count.size() << " value(s).\n";
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for (const auto& countVal : count)
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{
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os << " - " << countVal << '\n';
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}
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return crow::response{os.str()};
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});
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// ignore all log
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crow::logger::setLogLevel(crow::LogLevel::Debug);
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//crow::logger::setHandler(std::make_shared<ExampleLogHandler>());
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app.port(18080)
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.server_name("CrowCpp")
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.multithreaded()
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.run();
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}
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