1. MQTT客户端C代码库
1.1 C源码下载构建
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# centos7 OS 方法一 $ git clone https://github.com/eclipse/paho.mqtt.c.git $ cd paho.mqtt.c $ make $ sudo make install # make help查看当前Makefile支持命令 # make package 构造安装包压缩目录，解压缩后是生成项目链接库 mkdir -p build/output/samples mkdir -p build/output/test echo OSTYPE is Linux OSTYPE is Linux mkdir -p /usr/local/include install -m 644 build/output/libpaho-mqtt3c.so.1.3 /usr/local/lib install -m 644 build/output/libpaho-mqtt3cs.so.1.3 /usr/local/lib install -m 644 build/output/libpaho-mqtt3a.so.1.3 /usr/local/lib install -m 644 build/output/libpaho-mqtt3as.so.1.3 /usr/local/lib install build/output/paho_c_version /usr/local/bin install build/output/samples/paho_c_pub /usr/local/bin install build/output/samples/paho_c_sub /usr/local/bin install build/output/samples/paho_cs_pub /usr/local/bin install build/output/samples/paho_cs_sub /usr/local/bin /sbin/ldconfig /usr/local/lib ln -s libpaho-mqtt3c.so.1 /usr/local/lib/libpaho-mqtt3c.so ln -s libpaho-mqtt3cs.so.1 /usr/local/lib/libpaho-mqtt3cs.so ln -s libpaho-mqtt3a.so.1 /usr/local/lib/libpaho-mqtt3a.so ln -s libpaho-mqtt3as.so.1 /usr/local/lib/libpaho-mqtt3as.so install -m 644 src/MQTTAsync.h /usr/local/include install -m 644 src/MQTTClient.h /usr/local/include install -m 644 src/MQTTClientPersistence.h /usr/local/include install -m 644 src/MQTTProperties.h /usr/local/include install -m 644 src/MQTTReasonCodes.h /usr/local/include install -m 644 src/MQTTSubscribeOpts.h /usr/local/include install -m 644 src/MQTTExportDeclarations.h /usr/local/include install -m 644 doc/man/man1/paho_c_pub.1 /usr/local/share/man/man1 install -m 644 doc/man/man1/paho_c_sub.1 /usr/local/share/man/man1 install -m 644 doc/man/man1/paho_cs_pub.1 /usr/local/share/man/man1 install -m 644 doc/man/man1/paho_cs_sub.1 /usr/local/share/man/man1 #方法二，cmake指定构建安装目录，作为第三方动态链接库 #将项目目录下载到/root下面,同时指定生成目标安装位置为/root/mqtt mkdir -p root/mqtt/build cd /root/mqtt/ cmake -DCMAKE_INSTALL_PREFIX="/root/mqtt" ../paho.mqtt.c make make install |
编译成功后，生成4个二进制可执行文件，paho_c_pub paho_c_sub paho_cs_pub paho_cs_sub。c表示客户端，pub表示发布，sub表示订阅，cs表示安全openssl。还有4个动态链接库
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libpaho-mqtt3a.so - asynchronous (MQTTAsync) libpaho-mqtt3as.so - asynchronous with SSL (MQTTAsync) libpaho-mqtt3c.so - "classic" / synchronous (MQTTClient) libpaho-mqtt3cs.so - "classic" / synchronous with SSL (MQTTClient) |
1.2 C客户端可执行文件使用
- 可执行文件
命令行使用可参考 https://modelbasedtesting.co.uk/2018/08/08/paho-c-client-mqtt-5-0-and-command-line-utilities/
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paho_c_sub -t topic -h 127.0.0.1 -p 1883 -q 2 paho_c_pub -t topic -h 127.0.0.1 -q 2 -m "hello,user" |
1.3 排查问题
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$ paho_c_pub paho_c_pub: error while loading shared libraries: libpaho-mqtt3as.so.1: cannot open shared object file: No such file or directory |
建议进入paho.mqtt.c目录中，重新make install一下。
2. MQTT客户端Golang代码库
官方示例：在官方库中存在样本，例如paho.mqtt.golang库示例在paho.mqtt.golang/cmd目录中，可以编译参考
2.1 GO客户端API
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//安装go mqtt客户端 go get github.com/eclipse/paho.mqtt.golang go get github.com/gorilla/websocket go get golang.org/x/net/proxy //引入mqtt 客户端的API import "github.com/eclipse/paho.mqtt.golang" |
2.2 GO客户端API
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客户端go函数使用解释 https://www.cnblogs.com/veviDP/p/8900748.html
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MQTT非官方中文API手册 https://www.jianshu.com/p/05914c15b9a8
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