Hi,
I have been working on a Proto Compiler for Pascal.
Here is the repo.
I have been able to implement Marshaling and Unmarshaling of proto3.
Recently I took a stab at generating code of Services (as I need it for a project of mine).
The problem is that GRPC requires http2 support and I have not been able to figure out where to find an http2 library.
Free Pascal offers limited native support for HTTP/2, but full and functional implementation mainly depends on the use of third-party libraries or specific frameworks, as the standard
fcl-web library focuses more on HTTP/1.1 and basic components.
https://github.com/iLya2IK/wchttpserverThe main solution available is the wchttpserver project, a server written in Lazarus/Free Pascal that supports HTTP/2, HTTP/1.1, and WebSocket.
This project builds on the fpWeb modules (part of the Free Component Library) and extends its functionality with the following features:
- Protocols: Support for HTTP/2 (RFC 7540) and HTTP/1.1, with the ability to switch between modes.
- Security: Uses modified OpenSSL modules to create and maintain HTTP/2 connections, including TLS support.
- WebSocket: Supports the WebSocket protocol (RFC 6455) with the "permessage-deflate" extension (RFC 7692). Additional Features: Includes gzip/deflate compression, session management via cookies, multithreading with thread pools, and SQLite data persistence.
- Dependencies: Requires Free Pascal v3.2.0+, Lazarus v2.0.10+, OpenSSL (v1.1.0 or higher), SQLite, and Zlib.
For HTTP/2 clients, the standard Free Pascal ecosystem (via fcl-web or TFPHttpClient) does not provide robust documented native support for HTTP/2, generally focusing on HTTP/1.1. For advanced HTTP/2 needs, the recommended approach is to use the wchttpserver server or integrate external libraries via bindings, although specific documentation for pure HTTP/2 clients in Pascal is scarce compared to server solutions.
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