自动文件上传到网站

Question

我有一个带有上传文件表单的网站。一旦我的计算机上的本地文件夹发生更改，我想自动登录并上传图像文件。能否就此事提供任何指导。

Answer 1

根据我的理解，您可以为此编写一个任务，它可以每小时运行一次，并检查目录中是否进行了任何更改，然后将这些文件上传到您的应用程序上。

Answer 2

我不知道你正在开发什么样的系统，但你可以做这样的事情。如果您使用的是 linux 系统，则可以使用watch 命令来跟踪所选目录的活动。您可以做的是在由 watch 命令触发的 ruby​​ 脚本中使用 Mechanize 之类的东西，然后通过选择具有最新创建日期的文件来提交表单并为您上传文件。

Answer 3

我意识到它在帖子中说 ruby​​ on rails，但这个答案与用 Ruby 编写解决方案一样合法（而且更容易/更快）

使用 Qt C++ 来做到这一点，那么你可以这样做：

（未经测试，您必须根据自己的具体情况进行调整）

代码概览：

• 创建一个程序，该程序每 20 分钟在 Timer 上循环一次，并遍历您使用 WATCH_DIR 指定的整个目录，如果它发现该目录中的任何文件在循环上次运行时间之间被修改（或在程序启动之后但在第一个循环运行之前），然后它将该确切文件上传到您使用 UPLOAD_URL 指定的任何 URL

然后创建一个名为AutoUploader.pro的文件和一个名为main.cpp的文件

---

AutoUploader.pro

QT += core network
QT -= gui

CONFIG += c++11

TARGET = AutoUploader
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

---

main.cpp

#include <QtCore/QCoreApplication>
#include <QtCore/qglobal.h>
#include <QDir>
#include <QDirIterator>
#include <QNetworkAccessManager>
#include <QTimer>
#include <QByteArray>
#include <QHash>

#define WATCH_DIR "/home/lenny/images"
#define UPLOAD_URL "http://127.0.0.1/upload.php"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    MainLoop loop(WATCH_DIR);
    return a.exec();
}

class MainLoop : public QObject {
    Q_OBJECT
public: 
    MainLoop(QString _watch_directory = qApp->applicationDirPath()) {
        watch_directory = _watch_directory;


        // the  ACTION="" part of the upload form
        website_upload_url = UPLOAD_URL;

        /*  20 minutes
         20 * 60 * 1000 = num of milliseconds that makes up 
        20 mins =     1200000 ms */
        QTimer::singleShot(1200000, this, SLOT(check_for_updates()));

        /* this will stop any file modified before you ran this program from 
         being uploaded so it wont upload all of the files at runtime */
        program_start_time = QDateTime::currentDateTime();
    }


    QDateTime program_start_time;
    QString watch_directory;
    QString website_upload_url;

    // hash table to store all of the last modified times for each file 
    QHash<QString, QDateTime> last_modified_time;
    ~MainLoop() { qApp->exit(); }

public slots:
    void check_for_updates() {
        QDirIterator it(QDir(watch_directory));

        /* loop through all file in directory */
        while (it.hasNext()) {
            QFileInfo info(it.next());

            /* check to see if the files modified time is ahead of 
               program_start_time  */
            if (info.lastModified.msecsTo(program_start_time) < 1) {
                upload_file(info.absoluteFilePath());
            }
        }
        /* set program_start_time to the current time to catch stuff next
           time around and then start a timer to repeat this command in
           20 minutes */
        program_start_time = QDateTime::currentDateTime();
        QTimer::singleShot(1200000, this, SLOT(check_for_updates()));
    }


   /*  upload file  code came from 
      https://forum.qt.io/topic/11086/solved-qnetworkaccessmanager-uploading-files/2 
    */

    void upload_file(QString filename) {
        QNetworkAccessManager *am = new QNetworkAccessManager(this);
        QString path(filename);

        // defined with UPLOAD_URL
        QNetworkRequest request(QUrl(website_upload_url)); 

        QString bound="margin"; //name of the boundary
        //according to rfc 1867 we need to put this string here:
        QByteArray data(QString("--" + bound + "\r\n").toAscii());
        data.append("Content-Disposition: form-data; name=\"action\"\r\n\r\n");
        data.append("upload.php\r\n");
        data.append("--" + bound + "\r\n"); //according to rfc 1867
        data.append(QString("Content-Disposition: form-data; name=\"uploaded\"; filename=\"%1\"\r\n").arg(QFileInfo(filename).fileName()));     
        data.append(QString("Content-Type: image/%1\r\n\r\n").arg(QFileInfo(filename).suffix())); //data type
        QFile file(path);
        if (!file.open(QIODevice::ReadOnly))
            return;
        data.append(file.readAll()); //let's read the file
        data.append("\r\n");
        data.append("--" + bound + "--\r\n"); 
        request.setRawHeader(QString("Content-Type").toAscii(),QString("multipart/form-data; boundary=" + bound).toAscii());
        request.setRawHeader(QString("Content-Length").toAscii(), QString::number(data.length()).toAscii());
        this->reply = am->post(request,data);

        connect(this->reply, SIGNAL(finished()), this, SLOT(replyFinished()));   
    }

    void replyFinished() {
        /*  perform some code here whenever a download finishes */
    }

};

---

在运行此程序之前，请务必通读它并通过阅读 cmets 和帖子进行必要的更改——您可能还需要根据您的平台安装 qt 框架

无论如何，最后一步是运行qmake 来创建项目makefile，最后运行make 来构建二进制文件。

显然，最后的步骤因您使用的系统而异。

...该程序将继续运行...基本上永远运行，直到您关闭它...每 20 分钟上传更改的文件

希望这会有所帮助...