131 lines
3.2 KiB
C++
131 lines
3.2 KiB
C++
#include "crow.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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struct ExampleMiddleware
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{
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std::string message;
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ExampleMiddleware():
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message("foo")
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{
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}
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void setMessage(const std::string& newMsg)
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{
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message = newMsg;
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}
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struct context
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{};
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void before_handle(crow::request& req, crow::response& res, context& ctx)
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{
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CROW_LOG_DEBUG << " - MESSAGE: " << message;
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}
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void after_handle(crow::request& req, crow::response& res, context& ctx)
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{
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// no-op
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}
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};
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int main()
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{
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crow::App<ExampleMiddleware> app;
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app.get_middleware<ExampleMiddleware>().setMessage("hello");
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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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// a request to /path should be forwarded to /path/
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CROW_ROUTE(app, "/path/")
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([]() {
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return "Trailing slash test case..";
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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;
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x["message"] = "Hello, World!";
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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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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(crow::HTTPMethod::Post)([](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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auto 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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app.route_dynamic("/params")([](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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.multithreaded()
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.run();
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}
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