[C++] Server Stub Code Generator based on Pistache (#5838)

* Added C++ generator for Pistache

* Revert of CodegenOperation

* Updated template

* Removed isRestful from method declaration

* Updated httpMethod variable

* Changed isRestfulCreate

samples/server/petstore/pistache-server/api/PetApi.cpp

@@ -0,0 +1,177 @@
+/**
+* Swagger Petstore
+* This is a sample server Petstore server.  You can find out more about Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).  For this sample, you can use the api key `special-key` to test the authorization filters.
+*
+* OpenAPI spec version: 1.0.0
+* Contact: apiteam@swagger.io
+*
+* NOTE: This class is auto generated by the swagger code generator program.
+* https://github.com/swagger-api/swagger-codegen.git
+* Do not edit the class manually.
+*/
+
+#include "PetApi.h"
+
+namespace io {
+namespace swagger {
+namespace server {
+namespace api {
+
+using namespace io::swagger::server::model;
+
+PetApi::PetApi(Net::Address addr)
+    : httpEndpoint(std::make_shared<Net::Http::Endpoint>(addr))
+{ };
+
+void PetApi::init(size_t thr = 2) {
+    auto opts = Net::Http::Endpoint::options()
+        .threads(thr)
+        .flags(Net::Tcp::Options::InstallSignalHandler);
+    httpEndpoint->init(opts);
+    setupRoutes();
+}
+
+void PetApi::start() {
+    httpEndpoint->setHandler(router.handler());
+    httpEndpoint->serve();
+}
+
+void PetApi::shutdown() {
+    httpEndpoint->shutdown();
+}
+
+void PetApi::setupRoutes() {
+    using namespace Net::Rest;
+
+    Routes::Post(router, base + "/pet", Routes::bind(&PetApi::add_pet_handler, this));
+    Routes::Delete(router, base + "/pet/:petId", Routes::bind(&PetApi::delete_pet_handler, this));
+    Routes::Get(router, base + "/pet/findByStatus", Routes::bind(&PetApi::find_pets_by_status_handler, this));
+    Routes::Get(router, base + "/pet/findByTags", Routes::bind(&PetApi::find_pets_by_tags_handler, this));
+    Routes::Get(router, base + "/pet/:petId", Routes::bind(&PetApi::get_pet_by_id_handler, this));
+    Routes::Put(router, base + "/pet", Routes::bind(&PetApi::update_pet_handler, this));
+    Routes::Post(router, base + "/pet/:petId", Routes::bind(&PetApi::update_pet_with_form_handler, this));
+    Routes::Post(router, base + "/pet/:petId/uploadImage", Routes::bind(&PetApi::upload_file_handler, this));
+
+    // Default handler, called when a route is not found
+    router.addCustomHandler(Routes::bind(&PetApi::pet_api_default_handler, this));
+}
+
+void PetApi::add_pet_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+
+    // Getting the body param
+    Pet body;
+    
+    try {
+      nlohmann::json request_body = nlohmann::json::parse(request.body());
+      body.fromJson(request_body); 
+      this->add_pet(body, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::delete_pet_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+    // Getting the path params
+    auto petId = request.param(":petId").as<int64_t>();
+    
+    // Getting the header params
+    auto apiKey = request.headers().tryGetRaw("api_key");
+
+    try {
+      this->delete_pet(petId, apiKey, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::find_pets_by_status_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+
+    // Getting the query params
+    auto status = request.query().get("status");
+    
+    try {
+      this->find_pets_by_status(status, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::find_pets_by_tags_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+
+    // Getting the query params
+    auto tags = request.query().get("tags");
+    
+    try {
+      this->find_pets_by_tags(tags, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::get_pet_by_id_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+    // Getting the path params
+    auto petId = request.param(":petId").as<int64_t>();
+    
+    try {
+      this->get_pet_by_id(petId, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::update_pet_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+
+    // Getting the body param
+    Pet body;
+    
+    try {
+      nlohmann::json request_body = nlohmann::json::parse(request.body());
+      body.fromJson(request_body); 
+      this->update_pet(body, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::update_pet_with_form_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+    try {
+      this->update_pet_with_form(request, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+void PetApi::upload_file_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+    try {
+      this->upload_file(request, response);
+    } catch (std::runtime_error & e) {
+      //send a 400 error
+      response.send(Net::Http::Code::Bad_Request, e.what());
+      return;
+    }
+
+}
+
+void PetApi::pet_api_default_handler(const Net::Rest::Request &request, Net::Http::ResponseWriter response) {
+    response.send(Net::Http::Code::Not_Found, "The requested method does not exist");
+}
+
+}
+}
+}
+}
+