drogon/community

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Omar Mohamed Khallaf

@OmarMohamedKhallaf

I was wondering whether I can use co_routines with HttpController or not ?
I feel drogon::app().registerHandler() isn't the right way to do this.

An Tao

@an-tao

you can do that when declaring handler as correct API.

4 replies

An Tao

@an-tao

Arun Chandrasekaran

@carun

1 reply

Hi all, I'm trying to build a simple app and I'm seeing this error:

My CMakeLists.txt looks something like this:

project(Mozart)
cmake_minimum_required(VERSION 3.14)

cmake_policy(SET CMP0015 NEW)
if(POLICY CMP0074)
    cmake_policy(SET CMP0074 NEW)
endif()

if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Debug)
endif()

list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
add_custom_target(fetch_packages)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
add_definitions(-DNOMINMAX)

add_definitions(-DCOMMIT="${GIT_COMMIT_HASH}")

if(ENABLE_ASAN)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer -fsanitize=address,undefined")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fno-omit-frame-pointer -fsanitize=address,undefined")
endif()

if(ENABLE_TSAN)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer -fsanitize=thread")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fno-omit-frame-pointer -fsanitize=thread")
endif()

include(GitRevision)
include(FetchContent)

# Open source libraries
find_package(Boost REQUIRED)
find_package(Git REQUIRED)
find_package(Drogon REQUIRED)

include_directories(SYSTEM ${Boost_INCLUDE_DIRS})
include_directories(SYSTEM ${json_INCLUDE_DIR})
include_directories(SYSTEM ${CMAKE_BINARY_DIR})

link_directories(${Boost_LIBRARY_DIRS})
link_directories(${Boost_LIBRARIES})

add_subdirectory(src)

include(cmake/Docker.cmake)

what could I be doing wrong

HadiAbbasi

@HadiAbbasi

Hello
Is it possible to define PATH_ADD with regular expression on input path (as regex-pattern)?
suppose that I wanna create a dynamicFileLoaderCtrl which can load files, So it can send response to client dynamically!
I don't want bind some specific static URLs in my controller!
and it must load the ordered file if it exists, otherwise it must callback error 404!
just I wanna know regex on PATH_ADD possibility!


PATH_ADD_VIA_REGEX("/*.*",Get,Post);

//get request info & load & send file to client

Thanks A Lot...
All The Best,
Hadi

An Tao

@an-tao

Hi，you can use the ADD_METHOD_VIA_REGEX macro to achieve that.

5 replies

Ichiro

@HadesD

can i make a nested route for drogon likes laravel

Route::group('/parent', function() {
  Route::get('/child1', classA@index);
  Route::get('/child2', classB@index);
})->middleware('auth');

cause I want to set filter login to all child route, not like this

DROGON_ROUTE("/parent/child1", functionBind1, "auth")
DROGON_ROUTE("/parent/child2", functionBind2, "auth")

An Tao

@an-tao

you could define a macro for that.

HadiAbbasi

@HadiAbbasi

Hi there...
I don't know Am I right or not!
But I can't define a controller (handler) for empty path!

ADD_METHOD_TO(PageCtrl::RootRout,"",{Get , Post , Put , Patch , Delete , Head});
ADD_METHOD_TO(PageCtrl::RootRout,"/",{Get , Post , Put , Patch , Delete , Head});
METHOD_ADD(PageCtrl::RootRout,"",{Get , Post , Put , Patch , Delete , Head});
METHOD_ADD(PageCtrl::RootRout,"/",{Get , Post , Put , Patch , Delete , Head});

and there is no any drogon action on root request like:
http://mysite.com/

Clément Gamé 🧠

@WintermeW_twitter

Hi, i have a little question regarding Filters and the request object ref passed as parameter: I implemented an authentication filter that is properly working except one thing: Whenever i try to inject some user claims in the request (userId, profile_type etc..) with the help of req->setParameter(param_name,value) for later use in my controllers, the other query params seem added by the user in the URL seem to disappear. Am i doing something wrong ? What is the correct way for a filter to inject data in the request for later reuse by the controllers ?

Clément Gamé 🧠

@WintermeW_twitter

(note that i'd rather keep the auth mechanism sessionless)

An Tao

@an-tao

@WintermeW_twitter you could use the attributes of a request object to do that.

Clément Gamé 🧠

@WintermeW_twitter

@an-tao ok great, thank you

HadiAbbasi

@HadiAbbasi

Hi @an-tao
Is it possible to remove or change content-length or content-type of response as we need to test the caching of our cnd (made by nginx)?
In other words, I need to check the caching of my CDN for the while that there is no any cache-length on response headers and the origin server is drogon as there is no any limitation on (add/edit/remove headers on) it!
removeHeader method was not able to remove content-length!
I know that removing some headers like Content-Length can be dangerous but is there any solution for my problem?
All The Best,
Hadi

Maurice Barnett

@r3cebarnett

Apologies if this has already been answered somewhere. If I wanted to do a soft restart (without killing the parent process) of an application using Drogon, how might I cleanly resume Drogon?

It looks like drogon::app() returns a singleton and I can't find a way to reset it. I also tried to create my own instance of an HttpAppFramework object using newbut it seg faults upon deletion.

An Tao

@an-tao

Hi @an-tao
Is it possible to remove or change content-length or content-type of response as we need to test the caching of our cnd (made by nginx)?
In other words, I need to check the caching of my CDN for the while that there is no any cache-length on response headers and the origin server is drogon as there is no any limitation on (add/edit/remove headers on) it!
removeHeader method was not able to remove content-length!
I know that removing some headers like Content-Length can be dangerous but is there any solution for my problem?
All The Best,
Hadi

currently you can't do that, you need to change drogon code to achieve that.

3 replies

Apologies if this has already been answered somewhere. If I wanted to do a soft restart (without killing the parent process) of an application using Drogon, how might I cleanly resume Drogon?

There is no API of drogon to do that, you have to change drogon code to achieve that. please refer to the run() method of drogon::app().

An Tao

@an-tao

@HadiAbbasi You don't need to define a route for an empty path as it is equivalent to "/"

3 replies

1111mp

@1111mp

When I customize the filter, the lambda function passes the fccb execution causing the program to crash

Assertion failed: (idx < storage_.size()), function getThreadData, file IOThreadStorage.h, line 100.

can someone help me

please

thank you very much

1111mp

@1111mp

Probably know the reason, here you need to use the synchronous execCommandSync method.

An Tao

@an-tao

you should use the fast redis client to ensure that the storage is accessed in IO threads (not in the thread used by redis client)

please refer to the https://github.com/drogonframework/drogon/wiki/ENG-FAQ-1-Understanding-drogon-threading-model

jamal rashidi

@jamalrashidi1_twitter

hello
I have a problem with Trantor on Windows compiled with MSVC 2017 x64. I got the below error when running a simple TCP server using Trantor :

ERROR SO_REUSEPORT is not supported.

An Tao

@an-tao

    TcpServer(EventLoop *loop,
              const InetAddress &address,
              const std::string &name,
              bool reUseAddr = true,
              bool reUsePort = true);

you can set the last parameter to false

5 replies

Okami チム

@okami.mks:matrix.org

[m]

installing vcpkg was a struggle, XD

demenkovms

@demenkovms

Hello. I create controller by command: drogon_ctl create controller PingController:

PingController.h:

 #pragma once
 #include <drogon/HttpSimpleController.h>
 using namespace drogon; 
 class PingController : public drogon::HttpSimpleController<PingController>
 {
  public:
    virtual void asyncHandleHttpRequest(const HttpRequestPtr& req, std::function<void (const HttpResponsePtr &)> &&callback) override;
    PATH_LIST_BEGIN
     PATH_ADD("/PING", Get);
    PATH_LIST_END
 };

PingController.c:

#include "PingController.h"

void PingController::asyncHandleHttpRequest(const HttpRequestPtr& req, std::function<void (const HttpResponsePtr &)> &&callback)
{
    // write your application logic here

    auto resp = HttpResponse::newHttpResponse();
    resp->setStatusCode(k200OK);
    resp->setContentTypeCode(CT_TEXT_HTML);
    resp->setBody("PONG");
    callback(resp);

}

but when I try to call http://localhost/PING i get 404 Not Found

An Tao

@an-tao

did you re-cmake your project after adding this controller?

demenkovms

@demenkovms

yes, of course )

aliakbarrashidi

@aliakbarrashidi:matrix.org

[m]

LOG_TRACE << "log body";

I desire above line results a line in the log file but it doesn't.
why?
( I have set the log option correctly and I run the app in the Debug mode and others log have written to log file properly.)

An Tao

@an-tao

Did you set the log_level to TRACE?

3 replies

jamal rashidi

@jamalrashidi1_twitter

Is it possible to have nested drogon::HttpFilter for a request?
I want some requests go through multiple HttpFilters.

An Tao

@an-tao

ADD_METHOD_TO(Ctrl::handleSome, "/path/to/handler", "filter1","filter2","filter3");

jamal rashidi

@jamalrashidi1_twitter

Thanks

ADD_METHOD_TO(Ctrl::handleSome, "/path/to/handler", "filter1","filter2","filter3");

It is possible with METHOD_ADD to chain filters?

An Tao

@an-tao

yes

jamal rashidi

@jamalrashidi1_twitter

Thanks again

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