drogon/community

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nobody

@nobody93

I build with -DCMAKE_ENABLE_EXPORTS=on in ubuntu 18.04, but I could not find dynamic libraries with .so, I only got 2 static libraries libdrogon.a libtrantor.a, how can I build dynamic libraries with .so?

HadiAbbasi

@HadiAbbasi

Hey Guys
Just a simple question!
this is a test for me!
I wanna bind a callback to specific port!
in other words, I need to make conditions on port numbers to send related response to client that sends request to specific port!
as you can see, we can just add some listeners having ip , port!
But addListener method has no any callback args!


drogon::app().addListener("0.0.0.0",20001);
drogon::app().addListener("0.0.0.0",20002);
drogon::app().addListener("0.0.0.0",20003);

drogon::HttpAppFramework::instance().registerHandler("/index",
                        [=](const drogon::HttpRequestPtr &req , 
                            std::function<void (const drogon::HttpResponsePtr &)> &&callback)
                        {
                            if (req ->port == 20001)
                            {
                                auto resp = drogon::HttpResponse::newFileResponse("/path/to/img01.jpg", "", drogon::ContentType::CT_IMAGE_JPG);
                                callback(resp);
                            }
                            else if (req ->port == 20002)
                            {
                                auto resp = drogon::HttpResponse::newFileResponse("/path/to/img02.jpg", "", drogon::ContentType::CT_IMAGE_JPG);
                                callback(resp);
                            }
                            else if (req ->port == 20003)
                            {
                                auto resp = drogon::HttpResponse::newFileResponse("/path/to/img03.jpg", "", drogon::ContentType::CT_IMAGE_JPG);
                                callback(resp);
                            }
                        });

in the top example, req->port has error because req has no any port member!
so I don't know how can I set conditions or bind callbacks on ports!
All The Best,
Hadi

3 replies

slaught3red

@slaught3red:matrix.org

[m]

hey guys, could someone please help me out? so i'm having a problem while installing drogon via VCPKG: error: building openssl:x86-windows failed with: BUILD_FAILED. it seems that openssl must be installed as a drogo dependency but [dot]us servers are unreachable for me. so then i manually installed the openssl package but the vcpkg doesn't see it in downloaded folder for some reason. vcpkg list command doesn't seem to detect openssl file too. idk what to do =)

slaught3red

@slaught3red:matrix.org

[m]

oh nevermind i just managed to fix it =) sry for the inconvenience

Clément Gamé 🧠

@WintermeW_twitter

Hi, i would like to implement a session-less authentication with verification of an api key sent in a request header, and i was planning to use a registerPreHandlingAdvice hook in order to achieve this but i have a few questions. 1. Is it the correct way to go ? I mean, the point is that i don't want to inject the key verification routine in each method of each controller which requires authentication (it makes a lot of them) 2. Would i be able to return a 403 forbidden as a final response if key is invalid, from the registerPreHandlingAdvice callback ? Thank you

An Tao

@an-tao

Yes, you can do that

or you could implement that via a Filter

Clément Gamé 🧠

@WintermeW_twitter

Ok cool, i'll look into filters thank you :)

An Tao

@an-tao

NP:)

Clément Gamé 🧠

@WintermeW_twitter

@an-tao Is it theorically possible to use asynchronous code inside a doFilter and call fccb() from the done callback (fccb being captured by the lambda of the callback) because it seems to cause me troubles:

/usr/src/drogon/lib/inc/drogon/IOThreadStorage.h:100: drogon::IOThreadStorage<C>::ValueType& drogon::IOThreadStorage<C>::getThreadData() [with C = std::shared_ptr<drogon::HttpResponse>; drogon::IOThreadStorage<C>::ValueType = std::shared_ptr<drogon::HttpResponse>]: Assertion `idx < storage_.size()' failed.

Clément Gamé 🧠

@WintermeW_twitter

Indeed putting my code back in synchronous mode makes it work without any issue (no runtime error)

kapilpipaliya

@kapilpipaliya

how to disable Ctrl+C feature? when I press Ctrl+C it shouldn't quit. It shouldn't handle anything like that.

An Tao

@an-tao

/usr/src/drogon/lib/inc/drogon/IOThreadStorage.h:100: drogon::IOThreadStorage<C>::ValueType& drogon::IOThreadStorage<C>::getThreadData() [with C = std::shared_ptr<drogon::HttpResponse>; drogon::IOThreadStorage<C>::ValueType = std::shared_ptr<drogon::HttpResponse>]: Assertion `idx < storage_.size()' failed.

The error usually means the done callback is not in an IO threads of drogon. if you use dbClients, please use the Fast database clients, because it uses the IO threads.

how to disable Ctrl+C feature? when I press Ctrl+C it shouldn't quit. It shouldn't handle anything like that.

 /// Disable the handling of SIGTERM signal.
    /**
     * Enabled by default.
     *
     * @note
     * This operation can be performed by an option in the configuration file.
     * When disabled setTermSignalHandler() is useless
     */
    virtual HttpAppFramework &disableSigtermHandling() = 0;

kapilpipaliya

@kapilpipaliya

Thank you so much

deltine

@deltine

Is it possible to implement multiple APIs on one PC?

An Tao

@an-tao

You can create two applications for that.

1 reply

Ichiro

@HadesD

anybody is working on drogon 2.0?

Rafael Bugajewski

@rbugajewski

I think the current focus is still on 1.x, correct me if I’m wrong.

Stockwizard

@Stockwizard

Where is file #include <trantor/exports.h>?

An Tao

@an-tao

it's generated by cmake.

wrong car why

@minatozaki:matrix.org

[m]

Hi. I have read the documentation of Drogon and it is my first time using it, and c++ in general. I was just wondering, can someone help me on how to connect my mysql database and access it on Postman for CRUD? any help would be appreciated. thank you!

3 replies

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

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