C++/QT 使用RabbitMQ的demo 更新centos7下编译问题解决方法

本文链接：https://blog.youkuaiyun.com/youngwxy/article/details/127928842

本文介绍了一个使用QT编写的RabbitMQ Routing模式demo程序，实现了消息的发送与接收功能。文章分享了编译配置过程及解决CentOS 7环境下Qt OpenSSL版本不兼容问题的方法。

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源码及可执行程序地址

https://download.youkuaiyun.com/download/youngwxy/87073976

使用的RabbitMQ的Routing模式（type=direct），编写的demo程序，效果如下图

向Routingkey发送消息，接收Bingkey收到的消息；可以多发或多收，使用“；”分割

编译：

首先编译QAMQP，将编译得到的 qamqp.dll 拷贝到 src 文件夹 bin目录下

参考：QT使用RabbitMQ_一只羊_的博客-优快云博客_qt rabbitmq

在centos7下编译运行，出现openSSL报错

qt.network.ssl: QSslSocket: cannot resolve OPENSSL_init_ssl
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_init_crypto
qt.network.ssl: QSslSocket: cannot resolve ASN1_STRING_get0_data
qt.network.ssl: QSslSocket: cannot resolve EVP_CIPHER_CTX_reset
qt.network.ssl: QSslSocket: cannot resolve RSA_bits
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_new_null
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_push
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_free
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_num
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_pop_free
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_sk_value
qt.network.ssl: QSslSocket: cannot resolve DH_get0_pqg
qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_options
qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_ciphersuites
qt.network.ssl: QSslSocket: cannot resolve SSL_set_psk_use_session_callback
qt.network.ssl: QSslSocket: cannot resolve SSL_get_client_random
qt.network.ssl: QSslSocket: cannot resolve SSL_SESSION_get_master_key
qt.network.ssl: QSslSocket: cannot resolve SSL_session_reused
qt.network.ssl: QSslSocket: cannot resolve SSL_set_options
qt.network.ssl: QSslSocket: cannot resolve TLS_method
qt.network.ssl: QSslSocket: cannot resolve TLS_client_method
qt.network.ssl: QSslSocket: cannot resolve TLS_server_method
qt.network.ssl: QSslSocket: cannot resolve X509_up_ref
qt.network.ssl: QSslSocket: cannot resolve X509_STORE_CTX_get0_chain
qt.network.ssl: QSslSocket: cannot resolve X509_getm_notBefore
qt.network.ssl: QSslSocket: cannot resolve X509_getm_notAfter
qt.network.ssl: QSslSocket: cannot resolve X509_get_version
qt.network.ssl: QSslSocket: cannot resolve X509_STORE_set_ex_data
qt.network.ssl: QSslSocket: cannot resolve X509_STORE_get_ex_data
qt.network.ssl: QSslSocket: cannot resolve OpenSSL_version_num
qt.network.ssl: QSslSocket: cannot resolve OpenSSL_version
qt.network.ssl: Incompatible version of OpenSSL

此报错是由于QT使用的openSSL版本与系统不同所导致，解决办法如下：

1、查看QT版本匹配的openSSL版本

    // 查詢Qt支持的版本
    bool bSupp = QSslSocket::supportsSsl();
    QString buildVersion = QSslSocket::sslLibraryBuildVersionString();
    QString version = QSslSocket::sslLibraryVersionString();
    qDebug() << bSupp << buildVersion << version;

2、下载对应openSSL版本，编译

下载地址： https://github.com/openssl/

编译openSSL：

进入openSSL源码目录，执行下面两天命令

./config enable-shared

make -j4.net

部署openSSL：

cp libssl.so* libcrypto.so* /opt/Qt5.13.2/5.13.2/gcc_64/lib

完成后重新编译工程即可