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I am building online downloader with C++ wxWidgets GUI framework. I would like to implement downloading mechanism from http source. In source, file is in Zip, and after downloading, need to be unziped on windows program files folder. Can you provide examp

Taehyung Kwon answered on June 27, 2023 Popularity 1/10 Helpfulness 1/10

answer I am building online downloader with C++ wxWidgets GUI framework. I would like to implement downloading mechanism from http source. In source, file is in Zip, and after downloading, need to be unziped on windows program files folder. Can you provide examp

I am building online downloader with C++ wxWidgets GUI framework. I would like to implement downloading mechanism from http source. In source, file is in Zip, and after downloading, need to be unziped on windows program files folder. Can you provide examp

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#include <wx/wx.h>
#include <curl/curl.h>
#include <zip.h>

// Function to write downloaded data to a file
size_t WriteData(void* ptr, size_t size, size_t nmemb, FILE* stream)
{
    return fwrite(ptr, size, nmemb, stream);
}

// Function to download a file from an HTTP source
bool DownloadFile(const wxString& url, const wxString& destination)
{
    CURL* curl = curl_easy_init();
    if (curl)
    {
        FILE* file = fopen(destination.c_str(), "wb");
        if (file)
        {
            curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteData);
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, file);
            
            CURLcode result = curl_easy_perform(curl);
            
            fclose(file);
            
            if (result != CURLE_OK)
            {
                wxMessageBox(wxString::Format("Failed to download file: %s", curl_easy_strerror(result)), "Error", wxOK | wxICON_ERROR);
                return false;
            }
        }
        else
        {
            wxMessageBox(wxString::Format("Failed to create file: %s", destination), "Error", wxOK | wxICON_ERROR);
            return false;
        }
        
        curl_easy_cleanup(curl);
        return true;
    }
    
    wxMessageBox("Failed to initialize libcurl", "Error", wxOK | wxICON_ERROR);
    return false;
}

// Function to unzip a file
bool UnzipFile(const wxString& zipFile, const wxString& destination)
{
    int err = 0;
    zip* archive = zip_open(zipFile.mb_str(), 0, &err);
    if (archive)
    {
        int numFiles = zip_get_num_entries(archive, 0);
        for (int i = 0; i < numFiles; ++i)
        {
            zip_stat_t fileStat;
            zip_stat_index(archive, i, 0, &fileStat);
            
            zip_file_t* file = zip_fopen_index(archive, i, 0);
            if (file)
            {
                wxString filePath = wxString::Format("%s/%s", destination, fileStat.name);
                FILE* outFile = fopen(filePath.mb_str(), "wb");
                if (outFile)
                {
                    char* buffer = new char[fileStat.size];
                    zip_fread(file, buffer, fileStat.size);
                    fwrite(buffer, fileStat.size, 1, outFile);
                    delete[] buffer;
                    
                    fclose(outFile);
                }
                
                zip_fclose(file);
            }
        }
        
        zip_close(archive);
        return true;
    }
    
    wxMessageBox(wxString::Format("Failed to open zip file: %s", zipFile), "Error", wxOK | wxICON_ERROR);
    return false;
}

// Example usage
void DownloadAndUnzipFile()
{
    wxString url = "http://example.com/file.zip";
    wxString destination = "C:\\Program Files\\YourProgram";
    wxString zipFile = destination + "\\file.zip";
    
    // Download the file
    if (DownloadFile(url, zipFile))
    {
        // Unzip the downloaded file
        if (UnzipFile(zipFile, destination))
        {
            wxMessageBox("File downloaded and unzipped successfully!", "Success", wxOK | wxICON_INFORMATION);
        }
    }
}

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Tags: building c++ file http program-files typescript windows wxwidgets

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Contributed on Jun 27 2023

Taehyung Kwon

0 Answers Avg Quality 2/10

I am building online downloader with C++ wxWidgets GUI framework. I would like to implement downloading mechanism from http source. In source, file is in Zip, and after downloading, need to be unziped on windows program files folder. Can you provide examp

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I am building online downloader with C++ wxWidgets GUI framework. I would like to implement downloading mechanism from http source. In source, file is in Zip, and after downloading, need to be unziped on windows program files folder. Can you provide examp

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