Qt开发程序用QProcess调用curl命令上传文件并获取响应的文件

1.需求

做一个批量数字签名的工具，从一个文件夹内寻找所有的exe文件，然后复制到另外一个文件夹中，并且保存源文件的路径，将目标文件夹内的所有exe文件上传到公司的数字签名平台去做数字签名，并且返回接收后的文件；

尝试了libcurl的post请求，发现总是返回参数错误；

int HttpClient::PostFile(std::string strFile)
{
    std::string strurl = "http://10.1.13.228/sign";
    int iret = -1;

    struct curl_httppost *formpost = NULL;
    struct curl_httppost *lastptr = NULL;
    QFileInfo fileinfo(strFile.c_str());
    std::string strFilePath = fileinfo.absolutePath().toStdString();
    std::string strFileName = fileinfo.fileName().toStdString();
    QFile file(strFile.c_str());
    int filesize = file.size();
    QByteArray pBuffer = file.readAll();
    int buffsize = pBuffer.size();
    if (pBuffer.size() != fileinfo.size()) {
        printf("read file failed\n");
        
        return -iret;
    }
/*    */
    //curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "upfile", CURLFORM_FILE, strFile.c_str(), CURLFORM_CONTENTTYPE, "text/xml", CURLFORM_END);
    //curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "filename", CURLFORM_COPYCONTENTS, strFileName.c_str(), CURLFORM_END);
    //curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "action", CURLFORM_COPYCONTENTS, "upload", CURLFORM_END);
    CURL* curl = curl_easy_init();
    
    //curl_formadd(&formpost, &lastptr,
    //    CURLFORM_COPYNAME, "uploadfile",
    //    CURLFORM_FILE, strFilePath.c_str(),//imagepath
    //    CURLFORM_CONTENTTYPE, "multipart/form-data",
    //    CURLFORM_END);

    //curl_formadd(&formpost, &lastptr,
    //    CURLFORM_COPYNAME, "filename",
    //    CURLFORM_COPYCONTENTS, strFileName.c_str(),
    //    CURLFORM_END);
    
    if (curl)
    {
        /*curl_formadd(&formpost, &lastptr,
            CURLFORM_COPYNAME, "file",
            CURLFORM_BUFFER, strFileName.c_str(),
            CURLFORM_BUFFERPTR, pReadBuffer,
            CURLFORM_BUFFERLENGTH, fileinfo.size(),
            CURLFORM_CONTENTTYPE, "application/octet-stream",
            CURLFORM_END);*/
            /*curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "fileUpload",
                CURLFORM_FILE, strFile.c_str(),
                CURLFORM_END);*/
        curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "reqformat", CURLFORM_PTRCONTENTS, "plain", CURLFORM_END);

        curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "file", CURLFORM_PTRCONTENTS, pBuffer, CURLFORM_CONTENTSLENGTH, pBuffer.size(), CURLFORM_END);

        ///* Fill in the filename field */
        curl_formadd(&formpost,
            &lastptr,
            CURLFORM_COPYNAME, "filename",
            CURLFORM_COPYCONTENTS, strFileName.c_str(),
            CURLFORM_END);
        //curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "file", CURLFORM_FILE, strFile.c_str(), CURLFORM_END);
        /* Fill in the submit field too, even if this is rarely needed */
        curl_easy_setopt(curl, CURLOPT_POST, 1);
        curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
        //curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 5); // 重定向次数
        ///curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);//设置301、302跳转跟随location

        curl_easy_setopt(curl, CURLOPT_URL, strurl.c_str());
        //curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
        curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10);// 超时10秒

        if (0 == strncmp(strurl.c_str(), "https:", 6))
        {
            curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
            curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
        }
        struct curl_slist *headers = NULL;
        std::string strfiletext = "file:@" + strFile;
       
        headers = curl_slist_append(headers, "Content-Type:multipart/form-data");
        headers = curl_slist_append(headers, strfiletext.c_str());
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        char* raw_parame = "";
        //char* escap_param = curl_escape(raw_parame, strlen(raw_parame));
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, raw_parame);
        /* 长参数一定要设置CURLOPT_POSTFIELDSIZE，否则会截断 */
        curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, strlen(raw_parame));
        FILE *pagefile;
        //写入到文件
        QString strOutPath = fileinfo.absolutePath().toStdString().c_str();
        strOutPath+="/output/";
        QDir dir(strOutPath);
        if (!dir.exists())
        {
            dir.mkpath((strOutPath));
        }
        std::string strSigniturFile = fileinfo.absolutePath().toStdString() + "/output/" + strFileName;
        QFile Outputfileinfo(strSigniturFile.c_str());
        if (Outputfileinfo.exists())
        {
            Outputfileinfo.remove();
        }
        pagefile = fopen(strSigniturFile.c_str(), "wb");
        if (pagefile)
        {
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteFile);
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, pagefile);
            CURLcode res = curl_easy_perform(curl);
            if (res != CURLE_OK)
            {
                fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
            }
            fclose(pagefile);
            printf("************************************\n");
        }
        else {

            printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXX\n");
        }
            
        if (curl)
        {
            curl_easy_cleanup(curl);
        }
        if (headers)
        {
        }
    }
    return iret;
}

发现总是包参数错误；

后来发现可以curl加命令参数的方式上传程序文件去签名；前提是电脑必须安装了curl，可以打开window程序cmd.exe，然后查看curl --version 查看本地电脑的curl版本；

#include "UploadFileThread.h"
#include <QProcess>
UploadFileThread::UploadFileThread()
{

}

UploadFileThread::~UploadFileThread()
{

}

void UploadFileThread::SetFiles(QMap<QString, QString> taskInfo)
{
    m_taskInfo = taskInfo;
    start();
}


void UploadFileThread::run()
{
    int s = 0;
    for (auto is = m_taskInfo.begin(); is != m_taskInfo.end(); is++)
    {
        QString strPath = is.key();
        strPath = strPath.replace("/", "\\");
        QStringList strParameter;
        //strParameter << "curl";
        strParameter << "-F";
        strParameter << "fd=sha256";
        strParameter << "-F";
        strParameter << ("file=@"+ strPath);
        strParameter << "-F";
        strParameter << "cert_type=EV";
        strParameter << "http://109.1.13.228";
        strParameter << "-k";
        strParameter << "-f";
        strParameter << "-o";
        strParameter << strPath;
        QProcess process(this);
        process.execute("curl", strParameter);
        process.waitForStarted();
        process.waitForFinished();
        s++;
        emit signalProgress(int(100.0*(s) / m_taskInfo.size()));
    }
  
}