在 Qt4 上使用 POST 方法上传文件

本文介绍了在 Qt4 上使用 POST 方法上传文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在寻找有关如何在 Qt 上使用 HTTP POST 方法将文件上传到服务器的基本代码示例.

I'm looking for a basic code samples of how to upload files to server with HTTP POST method on Qt.

我的任务:我有一个简单的 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，但是对于 POST 上传我很困惑.另外我要说的是，没有上传文件的权限.

My task: 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.

如果有人已经在看这个话题?

If someone already looking this topic?

PS:我之所以这么问而不是自己编写代码是因为时间，我需要快速掌握这种方法.

PS: the reason why I'm asking and not coding my self is time, I need to get this method quick.

谢谢，我这边的所有成功解决方案都会在这里发布给其他人.

Thank you, all success solutions from my side will be posted here for others.

添加:这是我的代码，目前还不能运行.上传网站位于这里.

ADDED: Here is my code, that doesn't work yet. Upload site located here.

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 = "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 "); totalBytes.append("Content-Disposition: form-data; name="email" "); totalBytes.append(" "); totalBytes.append("billgates@microsoft "); totalBytes.append("--AaB03x "); totalBytes.append("Content-Disposition: form-data; name="photo"; filename="" + bytes+ "" "); totalBytes.append("Content-Transfer-Encoding: binary "); totalBytes.append(file->readAll()); totalBytes.append(" "); totalBytes.append("--AaB03x--"); header.setContentLength(totalBytes.length()); httpRequestAborted = false; httpGetId = http->request(header, totalBytes); file->close(); }

并阅读下面的回答功能:

and read answer function below:

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; }

推荐答案

另外，我今天发现了不错的代码:链接文本

Also, I found today nice code: link text

它是基于Qt4的上传/下载应用程序，里面有全套的POST headers由QNetworkAccessManager管理，所以对于初学者来说会很有帮助.

It's uploader/downloader app based on Qt4, with full set of POST headers managed by QNetworkAccessManager inside, so for beginners it will be very helpful.

所有者:僵硬的.ru

提交者:霍克斯诺克斯