我正在寻找如何使用Qt上的HTTP POST方法将文件上传到服务器的基本代码示例.
我的任务:我有简单的Qt程序,我需要从本地主机中选择任何图像文件并将其上传到服务器.选择部分和GUI很简单,我已经完成了,但是使用POST上传我很困惑.另外我不得不说,没有授权上传文件.
如果有人已经看过这个主题了？
PS:我之所以要求而不是自我编码的原因是时间,我需要快速获得这种方法.
谢谢,我方的所有成功解决方案都将在此处发布给其他人.
补充:这是我的代码,但还不行.上传网站位于此处.
void CDialog::on_uploadButton_clicked() {
QFileInfo fileInfo(absPathLineEdit->text());
if (!fileInfo.exists()) {
QMessageBox::information(this,
tr("Information"),
tr("File doesn't exists! Please, select another image."));
return;
}
file = new QFile(fileInfo.filePath());
if (!file->open(QIODevice::ReadOnly)) {
QMessageBox::information(this,
tr("Information"),
tr("Unable to open file for reading!"));
return;
}
QString host = "http://data.cod.ru";
QUrl url(host);
QHttp::ConnectionMode mode = QHttp::ConnectionModeHttp;
http->setHost(url.host(), mode, (url.port() == -1) ? 80 : url.port());
QHttpRequestHeader header("POST", "/", 1, 1);
header.setValue("Host", "data.cod.ru");
header.setValue("Content-type", "multipart/form-data, boundary=AaB03x");
header.setValue("Cache-Control", "no-cache");
header.setValue("Accept", "*/*");
QByteArray bytes(fileInfo.filePath().toUtf8());
QByteArray totalBytes;
totalBytes.append("--AaB03x\r\n");
totalBytes.append("Content-Disposition: form-data; name=\"email\"\r\n");
totalBytes.append("\r\n");
totalBytes.append("billgates@microsoft.com\r\n");
totalBytes.append("--AaB03x\r\n");
totalBytes.append("Content-Disposition: form-data; name=\"photo\"; filename=\"" + bytes+ "\"\r\n");
totalBytes.append("Content-Transfer-Encoding: binary\r\n\r\n");
totalBytes.append(file->readAll());
totalBytes.append("\r\n");
totalBytes.append("--AaB03x--");
header.setContentLength(totalBytes.length());
httpRequestAborted = false;
httpGetId = http->request(header, totalBytes);
file->close();
}
并阅读以下答案功能:
void CDialog::httpRequestFinished(int requestId, bool error) {
if (requestId != httpGetId)
return;
if (httpRequestAborted) {
if (file) {
file->close();
// file->remove();
// delete file;
file = 0;
}
return;
}
if (requestId != httpGetId)
return;
file->close();
if (error) {
// file->remove();
QMessageBox::information(this, tr("HTTP"),
tr("Download failed: %1.")
.arg(http->errorString()));
} else {
QByteArray data = http->readAll();
QFile *dataFile = new QFile("answer.txt");
dataFile->open(QIODevice::WriteOnly | QIODevice::Text);
dataFile->write(data);
dataFile->flush();
dataFile->close();
}
// delete file;
file = 0;
}
ser*_*nko 10
我看到你正在尝试使用QHTTP和QHttpRequestHeader类.QT文档说这些已被弃用:
这个类已经过时了.它用于保持旧的源代码工作.我们强烈建议不要在新代码中使用它.
所以,正如之前所建议的那样; 我建议您使用QNetworkAccessManager来完成您的工作
至于你原来的问题; 你仍然可以使用QHTTP上传文件; 我相信实际的请求标头结构取决于您尝试访问的特定网站.在这种情况下,像wireshark这样的工具会有很大的帮助.请检查下面的代码是否适合您,它应该从主文件夹上传test1.jpg文件,如果302响应返回,则将其链接转储到服务器上.
void MainWindow::on_pushButton_clicked()
{
http = new QHttp(this); // http declared as a member of MainWindow class
connect(http, SIGNAL(requestFinished(int,bool)), SLOT(httpRequestFinished(int, bool)));
QString boundary = "---------------------------723690991551375881941828858";
// action
QByteArray data(QString("--" + boundary + "\r\n").toAscii());
data += "Content-Disposition: form-data; name=\"action\"\r\n\r\n";
data += "file_upload\r\n";
// file
data += QString("--" + boundary + "\r\n").toAscii();
data += "Content-Disposition: form-data; name=\"sfile\"; filename=\"test1.jpg\"\r\n";
data += "Content-Type: image/jpeg\r\n\r\n";
QFile file("/home/test1.jpg");
if (!file.open(QIODevice::ReadOnly))
return;
data += file.readAll();
data += "\r\n";
// password
data += QString("--" + boundary + "\r\n").toAscii();
data += "Content-Disposition: form-data; name=\"password\"\r\n\r\n";
//data += "password\r\n"; // put password if needed
data += "\r\n";
// description
data += QString("--" + boundary + "\r\n").toAscii();
data += "Content-Disposition: form-data; name=\"description\"\r\n\r\n";
//data += "description\r\n"; // put description if needed
data += "\r\n";
// agree
data += QString("--" + boundary + "\r\n").toAscii();
data += "Content-Disposition: form-data; name=\"agree\"\r\n\r\n";
data += "1\r\n";
data += QString("--" + boundary + "--\r\n").toAscii();
QHttpRequestHeader header("POST", "/cabinet/upload/");
header.setValue("Host", "data.cod.ru");
header.setValue("User-Agent", "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100401 Ubuntu/9.10 (karmic) Firefox/3.5.9");
header.setValue("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
header.setValue("Accept-Language", "en-us,en;q=0.5");
header.setValue("Accept-Encoding", "gzip,deflate");
header.setValue("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7");
header.setValue("Keep-Alive", "300");
header.setValue("Connection", "keep-alive");
header.setValue("Referer", "http://data.cod.ru/");
//multipart/form-data; boundary=---------------------------723690991551375881941828858
header.setValue("Content-Type", "multipart/form-data; boundary=" + boundary);
header.setValue("Content-Length", QString::number(data.length()));
http->setHost("data.cod.ru");
http->request(header, data);
file.close();
}
void MainWindow::httpRequestFinished(int, bool)
{
QHttpResponseHeader responce = http->lastResponse();
if (responce.statusCode()==302)
{
qDebug() << "file accepted; get it from:";
qDebug() << "data.cod.ru" << responce.value("Location");
}
}
httpRequestFinished在MainWindow类的signals部分声明
希望这有帮助,privet;)