From f4cda117526f098b670bc5ab447e3220e2a6f777 Mon Sep 17 00:00:00 2001
From: touwoyimuli <touwoyimuli@gmail.com>
Date: Mon, 9 Dec 2019 00:09:36 +0800
Subject: [PATCH] feat: QNetworkAccessmanager and QNetworkReply and
 QNetworkRequest
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

提供网络协议的7层模型中的 中高层的网络协议：Http/FTP/SNMP等  ==>

QNetworkAccessmanager  协调网络操作类（处理网络的请求和回应）：负责发送网络请求，创建网络响应
QNetworkRequest        网络请求
QNetworkReply          网络请求的响应（提供finished()/readyRead()/downloadProgress()信号），监测网络响应的执行情况，执行相应的操作
---
 QtHttpEx/ExHttp.cpp          |   3 +-
 QtHttpEx/ExHttp.cpp.autosave | 109 -----------------------------------
 2 files changed, 2 insertions(+), 110 deletions(-)
 delete mode 100644 QtHttpEx/ExHttp.cpp.autosave

diff --git a/QtHttpEx/ExHttp.cpp b/QtHttpEx/ExHttp.cpp
index 33f04eb..dda83b2 100644
--- a/QtHttpEx/ExHttp.cpp
+++ b/QtHttpEx/ExHttp.cpp
@@ -12,6 +12,8 @@ ExHttp::ExHttp(QWidget *parent) :
     setWindowTitle("QNetworkAccessManager 网络管理使用 Http 协议下载");
 
     m_networkManager = new QNetworkAccessManager(this);
+    m_reply = nullptr;
+    m_file = nullptr;
 }
 
 ExHttp::~ExHttp()
@@ -65,7 +67,6 @@ void ExHttp::on_btnFile_clicked()
     QDir dir(currPath);
     dir.mkdir("temp");
 
-
     ui->lineEditFile->setText(currPath + "/temp/");
 }
 
diff --git a/QtHttpEx/ExHttp.cpp.autosave b/QtHttpEx/ExHttp.cpp.autosave
deleted file mode 100644
index dda83b2..0000000
--- a/QtHttpEx/ExHttp.cpp.autosave
+++ /dev/null
@@ -1,109 +0,0 @@
-#include "ExHttp.h"
-#include "ui_ExHttp.h"
-#include <QMessageBox>
-#include <QDir>
-#include <QDesktopServices>
-
-ExHttp::ExHttp(QWidget *parent) :
-    QMainWindow(parent),
-    ui(new Ui::ExHttp)
-{
-    ui->setupUi(this);
-    setWindowTitle("QNetworkAccessManager 网络管理使用 Http 协议下载");
-
-    m_networkManager = new QNetworkAccessManager(this);
-    m_reply = nullptr;
-    m_file = nullptr;
-}
-
-ExHttp::~ExHttp()
-{
-    delete ui;
-}
-
-//下载文件
-void ExHttp::on_btnDown_clicked()
-{
-    QString urlSpec = ui->lineEditUrl->text().trimmed();  //去掉字符串的首尾的空格
-    if (urlSpec.isEmpty()) {
-        QMessageBox::information(this, "提示", "下载地址URL为NULL");
-        return;
-    }
-
-    QUrl url = QUrl::fromUserInput(urlSpec);
-    if (!url.isValid()) {
-        QMessageBox::information(this, "提示", QString("无效URL: %1 \n 错误信息: %2").arg(urlSpec, url.errorString()));
-        return;
-    }
-
-    QString dir = ui->lineEditFile->text().trimmed();
-    if (dir.isEmpty()) {
-        QMessageBox::information(this, "提示", "保存地址为空");
-        return;
-    }
-
-    QString fileFileName = dir + url.fileName(); //文件保存地址 + 文件名
-    if (QFile::exists(fileFileName))
-        QFile::remove(fileFileName);
-
-    m_file = new QFile(fileFileName);    //创建临时文件
-    if (!m_file->open(QIODevice::WriteOnly)) {
-        QMessageBox::information(this, "提示", "打开临时文件错误");
-        return;
-    }
-
-    ui->btnDown->setEnabled(false);
-
-    m_reply = m_networkManager->get(QNetworkRequest(url));  //发送get网络请求，创建网络响应
-    connect(m_reply, SIGNAL(finished()), this, SLOT(onFinished()));
-    connect(m_reply, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
-    connect(m_reply, SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(onDownloadProgress(qint64,qint64)));
-}
-
-//默认的保存路径
-void ExHttp::on_btnFile_clicked()
-{
-    QString currPath = QDir::currentPath();
-    QDir dir(currPath);
-    dir.mkdir("temp");
-
-    ui->lineEditFile->setText(currPath + "/temp/");
-}
-
-//网络响应结束
-void ExHttp::onFinished()
-{
-    QFileInfo fileInfo;
-    fileInfo.setFile(m_file->fileName());
-
-    m_file->close();
-    delete m_file;
-    m_file = nullptr;
-
-    m_reply->deleteLater();
-    m_reply = nullptr;
-
-    if (ui->checkBox->isChecked())   //勾选了，下载完成之后，打开下载的文件               //absoluteFilePath() 返回包含文件名的绝对路径。
-        QDesktopServices::openUrl(QUrl::fromLocalFile(fileInfo.absoluteFilePath()));  //使用默认软件的打开下载的文件
-
-    ui->btnDown->setEnabled(true);
-}
-
-//读取下载的数据
-void ExHttp::onReadyRead()
-{
-    m_file->write(m_reply->readAll());   //将返回的数据进行读取，写入到临时文件中
-}
-
-//下载进程
-void ExHttp::onDownloadProgress(qint64 bytesRea, qint64 totalBytes)
-{
-    ui->progressBar->setMaximum(totalBytes);
-    ui->progressBar->setValue(bytesRea);
-}
-
-void ExHttp::on_lineEditUrl_textChanged(const QString &arg1)
-{
-    ui->progressBar->setMaximum(100);
-    ui->progressBar->setValue(0);
-}