[3] Nginx Server Setup - Connecting to C++ Web Framework

0. Researching C++ Web Frameworks

To achieve the goal of building a server in C++, I've started by researching suitable C++ web frameworks. According to GPT recommendations, Drogon is popular, so I'll proceed with this framework first.

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| Framework | Advantages | Disadvantages | |------------|-------------------------------------------------------------------------------------------|------------------------------------------------------------------| | Drogon | Supports modern C++14/17 standards
Asynchronous programming and multi-thread support
Supports HTTP2 and WebSocket
High performance and user-friendly API
Active community and support | Initial setup can be complex due to many features | | Pistache | Lightweight design enables quick web server implementation
Suitable for RESTful API development
Simple code and easy to learn | Slow development and updates
Limited functionality | | Crow | Intuitive usage similar to Python’s Flask
Includes JSON support and routing functionality
Lightweight design | Limited features, not ideal for complex applications
May lack active maintenance and support | | CppCMS | Suitable for high-performance web application development
Provides features like session management and internationalization | Complex setup and steep learning curve
More difficult to use compared to other frameworks, with limited documentation | | Restbed | Suitable for lightweight RESTful API development
Asynchronous and scalable design | Limited functionality, not ideal for large-scale projects
Lacks active updates and community support |

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1. Installing Framework Dependencies

``` sudo yum install -y git cmake gcc-c++ libuuid-devel openssl-devel zlib-devel brotli-devel jsoncpp-devel libuuid libuuid-devel

```

If jsoncpp-devel is unavailable, install it separately.

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Separate installation of JSONCPP

``` # Download the JSONCPP source code git clone https://github.com/open-source-parsers/jsoncpp.git cd jsoncpp

# Create build directory mkdir build cd build

# Configure and build using CMake cmake .. -DCMAKE_BUILD_TYPE=Release make -j$(nproc)

# Install sudo make install

# Link installation path (specify the installed path, in this case, it is /usr/local/lib64) echo "/usr/local/lib64" | sudo tee /etc/ld.so.conf.d/jsoncpp.conf sudo ldconfig

# Verification ldconfig -p | grep jsoncpp

[root@vbox build] (master) $ ldconfig -p | grep jsoncpp libjsoncpp.so.27 (libc6,x86-64) => /usr/local/lib64/libjsoncpp.so.27 libjsoncpp.so (libc6,x86-64) => /usr/local/lib64/libjsoncpp.so ```

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2. Building the Framework

``` git clone https://github.com/drogonframework/drogon.git cd drogon

mkdir build cd build cmake .. -DCMAKE_BUILD_TYPE=Release make -j$(nproc) sudo make install

```

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Error During Installation

``` CMake Error at CMakeLists.txt:137 (add_subdirectory): The source directory

/root/drogon/trantor

does not contain a CMakeLists.txt file. ```

- Run the following command: git submodule update --init --recursive

- After running the command, go to the build directory and execute: ``` cmake .. -DCMAKE_BUILD_TYPE=Release make -j$(nproc) sudo make install

Then rebuild. ```

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3. Verifying the Framework

To check the version:

``` [root@vbox drogon_ctl] (master) $ pwd /root/drogon/build/drogon_ctl [root@vbox drogon_ctl] (master) $ ./drogon_ctl version _ __| |_ __ ___ __ _ ___ _ __ / _` | '__/ _ \ / _` |/ _ \| '_ \ | (_| | | | (_) | (_| | (_) | | | | \__,_|_| \___/ \__, |\___/|_| |_| |___/

A utility for drogon Version: 1.9.8 Git commit: 8541e671430f9605a62f1afbd786c1dbd54197d6 Compilation: Compiler: c++ Compiler ID: GNU Compilation flags: -O3 -DNDEBUG -std=c++17 -I/usr/local/include Libraries: postgresql: no (pipeline mode: no) mariadb: no sqlite3: no ssl/tls backend: OpenSSL brotli: no hiredis: no c-ares: no yaml-cpp: no

```

Run the Built Test Server in the Following Directory

/root/drogon/build/examples

``` [root@vbox examples] (master) $ ./helloworld 20241103 16:23:09.594785 UTC 52417 INFO Server running on 127.0.0.1:8848 - main.cc:95 20241103 16:23:09.596557 UTC 52418 INFO setBeforeListenSockOptCallback:10 - main.cc:76 ```

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Internal CURL Test

``` [root@vbox ~] $ curl -v 127.0.0.1:8848 * Trying 127.0.0.1:8848... * Connected to 127.0.0.1 (127.0.0.1) port 8848 (#0) > GET / HTTP/1.1 > Host: 127.0.0.1:8848 > User-Agent: curl/7.76.1 > Accept: */* > * Mark bundle as not supporting multiuse < HTTP/1.1 200 OK < content-length: 13 < content-type: text/html; charset=utf-8 < server: drogon/1.9.8 < date: Sun, 03 Nov 2024 16:22:09 GMT < * Connection #0 to host 127.0.0.1 left intact ```

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Web Test

Reloading NGINX is necessary before running the web test.

``` worker_processes 10;

events { worker_connections 1024; use epoll; }

http { include mime.types; default_type application/octet-stream;

sendfile on; keepalive_timeout 65; large_client_header_buffers 4 16k;

server { listen 10099; server_name localhost;

location / { proxy_pass http://localhost:8848; # Proxy to backend server proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; } } } ```

After modifying the configuration, reload or restart NGINX: ./nginx -s reload" or

./nginx -s stop ./nginx

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Verifying Operation

Web(10099) -> VM -> NGINX (10099) -> Drogon (8848) This setup confirms the server operates in the above structure.

Related Links

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Recommended Link

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