Скачать или смотреть Compiling libcurl with OpenSSL for HTTPS Support in Msys2

Learn how to build and configure `libcurl` with OpenSSL support for handling HTTPS requests in your projects using Msys2 and Mingw.
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Compiling libcurl with OpenSSL for HTTPS Support in Msys2

When working with HTTP requests in C+ + , libcurl is a powerful and versatile library. However, many developers face challenges when trying to compile libcurl with OpenSSL for HTTPS support. One common issue is receiving the "Unsupported protocol" error when attempting to access HTTPS URLs, which can result from improper configuration during the build process. In this post, we will explore the steps needed to successfully compile libcurl with OpenSSL on Msys2, ensuring your project can handle HTTPS requests seamlessly.

The Problem: Unsupported Protocol Error

You may have followed the necessary steps to compile libcurl, OpenSSL, and zlib, only to encounter the error:

[[See Video to Reveal this Text or Code Snippet]]

This typically indicates that libcurl was not linked or compiled correctly with support for SSL/TLS protocols via OpenSSL. Let’s dive into the solution.

The Solution: Compiling from Source

Here’s a step-by-step guide to correctly compile libcurl with OpenSSL and zlib in Msys2.

Step 1: Compile zlib

Before compiling libcurl, ensure that zlib is built correctly. Follow these commands:

Navigate to the zlib directory in your terminal.

Run the following commands:

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This will set up zlib for your environment.

Step 2: Compile OpenSSL

Next, you need to compile OpenSSL. Use the following commands in the OpenSSL directory:

Configure OpenSSL by running:

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Adjust the mingw argument to mingw64 if you want to build for 64-bit architecture.

Build and install OpenSSL with:

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Step 3: Compile libcurl

Finally, you can compile libcurl itself. Navigate to the libcurl source directory and run these commands:

Run the configuration command to link with zlib and OpenSSL correctly:

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Make sure to replace PATH_TO_COMPILED_ZLIB and PATH_TO_COMPILED_OPENSSL with the actual paths where you installed those libraries.

After configuration, compile libcurl with:

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Testing Your Setup

Once you have compiled libcurl, you can test your setup by making an HTTPS request. Here’s a simple code snippet that uses libcurl to make a GET request:

[[See Video to Reveal this Text or Code Snippet]]

Expected Output

If everything is set up correctly, running the code above should successfully retrieve and display the content of https://www.google.com without any protocol errors.

Conclusion

Compiling libcurl with OpenSSL support in Msys2 is essential for handling HTTPS requests in your projects. By following the outlined steps to build zlib, OpenSSL, and libcurl correctly, you can avoid common pitfalls such as the "Unsupported protocol" error. With your environment set up correctly, you will be able to utilize the full potential of libcurl for secure web communications.