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#include <drogon/HttpController.h>
#include <drogon/HttpMiddleware.h>
using namespace drogon;
class Middleware1 : public drogon::HttpMiddleware<Middleware1>
{
public:
Middleware1()
{
// do not omit constructor
void(0);
};
void invoke(const HttpRequestPtr &req,
MiddlewareNextCallback &&nextCb,
MiddlewareCallback &&mcb) override
{
auto ptr = std::make_shared<std::string>("1");
req->attributes()->insert("test-middleware", ptr);
nextCb([req, ptr, mcb = std::move(mcb)](const HttpResponsePtr &resp) {
ptr->append("1");
resp->setBody(*ptr);
mcb(resp);
});
}
};
class Middleware2 : public drogon::HttpMiddleware<Middleware2>
{
public:
Middleware2()
{
// do not omit constructor
void(0);
};
void invoke(const HttpRequestPtr &req,
MiddlewareNextCallback &&nextCb,
MiddlewareCallback &&mcb) override
{
auto ptr = req->attributes()->get<std::shared_ptr<std::string>>(
"test-middleware");
ptr->append("2");
nextCb([req, ptr, mcb = std::move(mcb)](const HttpResponsePtr &resp) {
ptr->append("2");
resp->setBody(*ptr);
mcb(resp);
});
}
};
class Middleware3 : public drogon::HttpMiddleware<Middleware3>
{
public:
Middleware3()
{
// do not omit constructor
void(0);
};
void invoke(const HttpRequestPtr &req,
MiddlewareNextCallback &&nextCb,
MiddlewareCallback &&mcb) override
{
auto ptr = req->attributes()->get<std::shared_ptr<std::string>>(
"test-middleware");
ptr->append("3");
nextCb([req, ptr, mcb = std::move(mcb)](const HttpResponsePtr &resp) {
ptr->append("3");
resp->setBody(*ptr);
mcb(resp);
});
}
};
class MiddlewareBlock : public drogon::HttpMiddleware<MiddlewareBlock>
{
public:
MiddlewareBlock()
{
// do not omit constructor
void(0);
};
void invoke(const HttpRequestPtr &req,
MiddlewareNextCallback &&nextCb,
MiddlewareCallback &&mcb) override
{
auto ptr = req->attributes()->get<std::shared_ptr<std::string>>(
"test-middleware");
ptr->append("block");
mcb(HttpResponse::newHttpResponse());
}
};
#if defined(__cpp_impl_coroutine)
class MiddlewareCoro : public drogon::HttpCoroMiddleware<MiddlewareCoro>
{
public:
MiddlewareCoro()
{
// do not omit constructor
void(0);
};
Task<HttpResponsePtr> invoke(const HttpRequestPtr &req,
MiddlewareNextAwaiter &&nextAwaiter) override
{
auto ptr = req->attributes()->get<std::shared_ptr<std::string>>(
"test-middleware");
ptr->append("coro");
auto resp = co_await nextAwaiter;
ptr->append("coro");
resp->setBody(*ptr);
co_return resp;
}
};
#endif
class MiddlewareTest : public drogon::HttpController<MiddlewareTest>
{
public:
METHOD_LIST_BEGIN
ADD_METHOD_TO(MiddlewareTest::handleRequest,
"/test-middleware",
Get,
"Middleware1",
"Middleware2",
"Middleware3",
"Middleware4");
ADD_METHOD_TO(MiddlewareTest::handleRequest,
"/test-middleware-block",
Get,
"Middleware1",
"Middleware2",
"MiddlewareBlock",
"Middleware3");
#if defined(__cpp_impl_coroutine)
ADD_METHOD_TO(MiddlewareTest::handleRequest,
"/test-middleware-coro",
Get,
"Middleware1",
"Middleware2",
"MiddlewareCoro");
#endif
METHOD_LIST_END
void handleRequest(
const HttpRequestPtr &req,
std::function<void(const HttpResponsePtr &)> &&callback) const
{
req->attributes()
->get<std::shared_ptr<std::string>>("test-middleware")
->append("test");
callback(HttpResponse::newHttpResponse());
}
};
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