C/C++编程：libssh2学习（win10 + qt_creator+ qmake + vcpkg）

布满荆棘的人生 2023-01-09 01:16 263阅读 0赞

# vcpkg安装libssh2 #

1、[vcpkg：win10安装使用 vcpkg][vcpkg_win10_ vcpkg]

2、安装libssh2

vcpkg install libssh2:x64-windows

## 测试 ##

1、qtcreator中创建一个工程  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 5]  
创建的工程如下：  
![在这里插入图片描述][20210120163557261.png]  
2、修改`ssl2_test.pro`。 在最下面添加：

INCLUDEPATH += C:\Users\oceanstar\vcpkg\win\vcpkg\installed\x64-windows\include
    LIBS    += C:\Users\oceanstar\vcpkg\win\vcpkg\installed\x64-windows\lib\libssh2.lib

3、main.cpp中

#include <QCoreApplication>
    #include <libssh2.h>
    #include <libssh2_sftp.h>
    
    
    
    int main(int argc, char *argv[])
    {
        
        QCoreApplication a(argc, argv);
    
        if (!libssh2_version(LIBSSH2_VERSION_NUM)) {
        
           fprintf (stderr, "Runtime libssh2 version too old!");
           exit(1);
        }
        printf("libssh2 version: %s", libssh2_version(0) );
    
        return a.exec();
    }

4、运行  
![在这里插入图片描述][20210120163751774.png]  
结果报错：code -1073741515  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 6]  
原因：缺失dll  
解决：将`vcpkg\installed\x64-windows\bin\libssh2.dll`复制到qt的debug目录下  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 7]  
重新运行，效果如下  
![在这里插入图片描述][20210120164417631.png]

# 封装SshClient #

1、创建一个类`SshClient`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 9]

## 封装1：libssh初始化与析构 ##

`sshclient.h`

#ifndef SSHCLIENT_H
    #define SSHCLIENT_H
    #include <QLoggingCategory>
    #include <QObject>
    #include <libssh2.h>
    #include <libssh2_sftp.h>
    Q_DECLARE_LOGGING_CATEGORY(sshclient)
    
    class SshClient : public QObject
    {
        
        Q_OBJECT
        static int s_nbInstance;
        QString m_name;
    
    
    public:
        explicit SshClient(const QString &name = "noname",QObject *parent = nullptr);
        virtual ~SshClient();
        QString getName() const;
        void setName(const QString &name);
    
    signals:
    
    };
    
    #endif // SSHCLIENT_H

`sshclient.cpp`

#include "sshclient.h"
    Q_LOGGING_CATEGORY(sshclient, "ssh.client", QtDebugMsg)
    
    int SshClient::s_nbInstance = 0;
    SshClient::SshClient(const QString &name, QObject *parent) : QObject(parent), m_name(name)
    {
        
        if(s_nbInstance == 0)
        {
        
            qCDebug(sshclient)  << "["  << __FILE__ << ","<<__FUNCTION__  << "(" << __LINE__ << ")]" << m_name << ": libssh2_init()";
            Q_ASSERT(libssh2_init(0) == 0);
        }
        ++s_nbInstance;
    
        qCDebug(sshclient)  << "["  << __FILE__ << ","<<__FUNCTION__  << "(" << __LINE__ << ")]" << m_name << ": created " << this;
    }
    
    
    SshClient::~SshClient()
    {
        
        qCDebug(sshclient)  << "["  << __FILE__ << ","<<__FUNCTION__  << "(" << __LINE__ << ")]" << m_name << ": SshClient::~SshClient() " << this;
        --s_nbInstance;
        if(s_nbInstance == 0)
        {
        
            qCDebug(sshclient)  << "["  << __FILE__ << ","<<__FUNCTION__  << "(" << __LINE__ << ")]" << m_name << ": libssh2_exit()";
            libssh2_exit();
        }
        qCDebug(sshclient)  << "["  << __FILE__ << ","<<__FUNCTION__  << "(" << __LINE__ << ")]" << m_name << ": destroyed";
    }
    
    QString SshClient::getName() const
    {
        
        return m_name;
    }
    void SshClient::setName(const QString &name)
    {
        
        m_name = name;
    }

使用正常：  
![在这里插入图片描述][20210128181105885.png]

[vcpkg_win10_ vcpkg]: https://blog.csdn.net/zhizhengguan/article/details/112686219
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70]: /images/20221119/36dd21a3086f403a863d2c4805ec3cd4.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 5]: /images/20221119/b236dd08c1794e79b1d426efc3609968.png
[20210120163557261.png]: /images/20221119/ceca2983d45f4e00a4491ff3d346b151.png
[20210120163751774.png]: /images/20221119/957297709c4a494e85b9345d3eacc5e5.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 6]: /images/20221119/42094a20bf42454bbf85b635f778fabc.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 7]: /images/20221119/b43cb50e104740d79ff343d1a7a90dc2.png
[20210120164417631.png]: /images/20221119/c15b709d9b1944dbbd8867c1e59c4b6d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 8]: /images/20221119/ac614dd9d8084688a8b639413226cb28.png
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[20210128181105885.png]: /images/20221119/bda2bc0e03044a8ebe0fbce70cb033a4.png