Pistache for C++: Next-Generation REST Framework

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Pistache is a modern, lightweight, and high-performance library for creating REST APIs in C++. Developed from scratch using C++11/14/17 features, it provides developers with a clean, intuitive interface for building HTTP servers and clients. Unlike cumbersome solutions like Boost.Asio, Pistache offers a concise API that makes creating web services in C++ as simple as in Python or Node.js, while retaining all the power and performance of native code.

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Why is Pistache needed? In the modern world of microservice architecture and the Internet of Things (IoT), there is often a need to create lightweight, fast, and reliable HTTP servers. C++ is ideal for such tasks due to its performance, but traditionally writing an HTTP server in C++ was a complex and time-consuming process. Pistache solves this problem by providing ready-made abstractions for routing, request handling, parameter parsing, session management, and much more. The library is actively used in production for building REST APIs, webhooks, microservices, and even as a foundation for more complex network applications.

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Key features of Pistache include: asynchronous request processing based on epoll (Linux) or kqueue (macOS), HTTP/1.1 support, built-in parsing of query parameters and JSON (via third-party libraries), a flexible routing system with support for path parameters, automatic memory management via smart pointers, and full thread safety. All this makes Pistache an excellent choice for projects where both development speed and execution speed are important.

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Installing Pistache

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Pistache is not installed via pip or npm, as it is a native C++ library. Installation is done through system package managers or by building from source.

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Linux (Ubuntu/Debian)

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# Install dependencies\nsudo apt-get update\nsudo apt-get install -y libpistache-dev cmake g++ libssl-dev\n\n# Verify installation\ndpkg -l | grep pistache

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macOS (Homebrew)

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brew install pistache

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Building from source (cross-platform method)

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git clone https://github.com/pistacheio/pistache.git\ncd pistache\nmkdir build && cd build\ncmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..\nmake -j$(nproc)\nsudo make install

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Quick Start: Minimal Server

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Let's create a simple HTTP server that responds with "Hello, World!" to any GET request.

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#include <pistache/endpoint.h>\n#include <pistache/http.h>\n#include <iostream>\n\nusing namespace Pistache;\n\nclass HelloHandler : public Http::Handler {\npublic:\n    HTTP_PROTOTYPE(HelloHandler)\n\n    void onRequest(const Http::Request& request, Http::ResponseWriter writer) override {\n        writer.send(Http::Code::Ok, "Hello, World!\\n");\n    }\n};\n\nint main() {\n    // Create an endpoint on port 9080\n    Address addr(Ipv4::any(), Port(9080));\n    auto opts = Http::Endpoint::options().threads(1);\n    Http::Endpoint server(addr);\n    server.init(opts);\n    server.setHandler(std::make_shared<HelloHandler>());\n    server.serve();\n\n    return 0;\n}

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Compilation: g++ -std=c++17 -lpistache -lpthread -o server server.cpp

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Start the server and open http://localhost:9080 in your browser — you will see the greeting.

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Main Pistache Classes and Methods

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Let's look at the key components of the library with usage examples.

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1. Http::Endpoint — Server Entry Point

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Signature: Http::Endpoint(const Address& addr);

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What it does: Creates an HTTP server bound to