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POUpload file with POST method on Qt4
 

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    <p>I'm looking for a basic code samples of how to upload files to server with HTTP POST method on Qt.</p> <p>My <strong>task</strong>: I have simple Qt program and I need to select any image file from the local host and upload it to the server. The selection part and GUI is simple and I have already done it, but with POST uploading I'm confused. In addition I have to say, that there is no authorization to upload file.</p> <p>If someone already looking this topic?</p> <p>PS: the reason why I'm asking and not coding my self is time, I need to get this method quick.</p> <p>Thank you, all success solutions from my side will be posted here for others.</p> <p><strong>ADDED:</strong> Here is my code, that doesn't work yet. Upload site located <a href="http://data.cod.ru" rel="noreferrer">here</a>.</p> <pre><code>void CDialog::on_uploadButton_clicked() { QFileInfo fileInfo(absPathLineEdit-&gt;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-&gt;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-&gt;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-&gt;readAll()); totalBytes.append("\r\n"); totalBytes.append("--AaB03x--"); header.setContentLength(totalBytes.length()); httpRequestAborted = false; httpGetId = http-&gt;request(header, totalBytes); file-&gt;close(); } </code></pre> <p>and read answer function below:</p> <pre><code>void CDialog::httpRequestFinished(int requestId, bool error) { if (requestId != httpGetId) return; if (httpRequestAborted) { if (file) { file-&gt;close(); // file-&gt;remove(); // delete file; file = 0; } return; } if (requestId != httpGetId) return; file-&gt;close(); if (error) { // file-&gt;remove(); QMessageBox::information(this, tr("HTTP"), tr("Download failed: %1.") .arg(http-&gt;errorString())); } else { QByteArray data = http-&gt;readAll(); QFile *dataFile = new QFile("answer.txt"); dataFile-&gt;open(QIODevice::WriteOnly | QIODevice::Text); dataFile-&gt;write(data); dataFile-&gt;flush(); dataFile-&gt;close(); } // delete file; file = 0; } </code></pre>
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