'Poco addRecursive Not Returning to Normal Program Flow

I implemented Poco in my C++ application for Windows in VS 2019 using tips from this post: How to use Poco::ZIP to compress/decompress zip file

I have figured out how to recursively compress a folder with this code snippet:

    // Now that we have an output file name, compress
    std::ofstream fos(z_file, std::ios::binary);
    Poco::Zip::Compress c(fos, true);
    Poco::File aFile(file_path);
    if (aFile.exists()) {
        Poco::Path p(aFile.path());
        if (aFile.isDirectory()) {
            c.addRecursive(p, Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
                Poco::Zip::ZipCommon::CL_MAXIMUM, true);
        }
    }
    else {
        std::cout << "File not found... \r\n";
    }
    // Just in case these don't get called above.
    c.close(); // MUST be done to finalize the Zip file
    fos.close();
    return z_file;
}

My question is that once the code gets to,

c.addRecursive(p, Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
                Poco::Zip::ZipCommon::CL_MAXIMUM, true);

the program continues to run normally, and does compress the folder just fine. However, the program does not return to normal execution flow. Is it going off on a thread and not coming back? I have researched that I can get an update about files being added to the archive through

Poco::FIFOEvent<const ZipLocalFileHeader> EDone;

It also says that closing the file is essential to creating the archive, but seems that with addRecursive my close() never gets called.

Any help would be appreciated.

Regards

c++directorycompression


Solution 1:[1]

Still getting back to C++ after a while off, but it was the way that I was calling the function where this code resides.

In the code that calls this, I was using:

std::string send_file { fh.compress_folder(home_dir) };

When I changed it to:

std::string send_file = fh.compress_folder(home_dir);

Then added a try/catch to the above code as:

    std::ofstream fos(z_file, std::ios::binary);
    Poco::Zip::Compress c(fos, true);
    Poco::File aFile(file_path);
    if (aFile.exists()) {
        Poco::Path p(aFile.path());
        if (aFile.isDirectory()) {
            try {
                c.addRecursive(p, Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
                    Poco::Zip::ZipCommon::CL_MAXIMUM, true);
            } catch(const Poco::Exception e) {
                std::cout << e.what() << "/r/n";
            }
        }
    }
    else {
        std::cout << "File not found... \r\n";
    }
    // Just in case these don't get called above.
    c.close(); // MUST be done to finalize the Zip file
    fos.close();
    return z_file;

Now, the program properly returns and does not travel off into lala land any more.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 SysRisk

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