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README
EPL-2.0

ohos_mqtt

介绍

使应用程序能够连接到MQTT代理以发布消息、订阅主题和接收发布的消息。

下载安装

ohpm install @ohos/mqtt

源码下载

本项目依赖paho.mqtt.c库和third_party_bounds_checking_function库,通过git submodule引入,下载代码时需加上--recursive参数。

git clone --recursive https://gitee.com/openharmony-tpc/ohos_mqtt.git

使用说明

    import { MqttAsync } from '@ohos/mqtt';

Demo运行说明

mqtt使用依赖mqtt broker,请使用云服务或自行搭建,将 emqxPage.ets 文件中的如下参数改成对应的值,才能正常运行demo。

    // Set Client Configuration
@State topic: string = '';
@State payload: string = '';
@State url: string = '';
@State clientId: string = '';
@State userName: string = "";
@State password: string = "";

将xts中的domain:port替换成正确的域名与端口,才能正常运行xts.

openssl依赖

如果想要开启ssl功能,需要自行编译openssl,openssl集成到应用hap

1.编译之前需要先修改HPKBUILD文件中第四行openssl的版本

pkgver=OpenSSL_1_1_1t 
//修改为
pkgver=OpenSSL_1_1_1w

2.下载openssl的OpenSSL_1_1_1w版本,执行以下命令获取对应的sha512值,替换SHA512SUM文件的内容。

sha512num openssl-OpenSSL_1_1_1w.tar.gz

3.在cpp目录下新增thirdparty目录,并将编译生成的库拷贝到该目录下,如下图所示 img.png

4.在cpp/paho.mqtt.c/CMakeList.txt中添加如下语句

#开启ssl
add_definitions(-DOPENSSL)
#将三方库加入工程中
target_link_libraries(pahomqttc PRIVATE ${NATIVERENDER_ROOT_PATH}/thirdparty/openssl/${OHOS_ARCH}/lib/libssl.a)
target_link_libraries(pahomqttc PRIVATE ${NATIVERENDER_ROOT_PATH}/thirdparty/openssl/${OHOS_ARCH}/lib/libcrypto.a)

#将三方库的头文件加入工程中
target_include_directories(pahomqttc PRIVATE ${NATIVERENDER_ROOT_PATH}/thirdparty/openssl/${OHOS_ARCH}/include)

接口说明

createMqtt

createMqtt(options: MqttAsyncClientOptions): MqttAsyncClient

创建mqtt客户端。

参数:

参数名 类型 必填 说明
options MqttAsyncClientOptions 客户端参数

返回值:

类型 说明
MqttAsyncClient mqtt客户端,里面包括connect,publish等方法

示例:

    this.mqttAsyncClient = MqttAsync.createMqtt({
        url: "ip:port",
        clientId: "e5fatos4jh3l79lndb0bs",
        persistenceType: 1,
    })

connect

connect(options: MqttConnectOptions, callback: AsyncCallback): void

连接mqtt服务器。

参数:

参数名 类型 必填 说明
options MqttConnectOptions 参考MqttConnectOptions
callback AsyncCallback< MqttResponse > 回调函数

示例:


    let options = {
        //set userName and password
        userName: "",
        password: "",
        connectTimeout: 30,
        version: 0,
    };
    this.mqttAsyncClient.connect(options, (err: Error, data: MqttResponse) => {
        // to do Something
    });

connect

connect(options: MqttConnectOptions): Promise

连接mqtt服务器。

参数:

参数名 类型 必填 说明
options MqttConnectOptions 参考MqttConnectOptions

返回值:

类型 说明
Promise<MqttResponse> 以Promise形式返回发起连接的结果。

示例:


    let options = {
        //set userName and password
        userName: "",
        password: "",
        connectTimeout: 30,
        version: 0,
    };
    this.mqttAsyncClient.connect(options).then((data: MqttResponse) => {
        console.log("mqtt connect success "+ JSON.stringify(data));
    }).catch((err: MqttResponse) => {
        console.log("mqtt connect fail"+JSON.stringify(err))
    })

    try{
        let result: MqttResponse = await this.mqttAsyncClient.connect(options)
        console.log("mqtt connect success "+ JSON.stringify(result));
    }catch(err){
        console.log("mqtt connect fail "+ JSON.stringify(err));
    }

publish

publish(options: MqttPublishOptions, callback: AsyncCallback): void

发布消息。

参数:

参数名 类型 必填 说明
options MqttPublishOptions 参考MqttPublishOptions
callback AsyncCallback< MqttResponse > 回调函数

示例:

    let publishOption = {
        topic: "domotopic",
        qos: 1,
        payload: "haishangdebing",
    }
    this.mqttAsyncClient.publish(publishOption, (err: Error, data: MqttResponse) => {
        // to do Something
    });

publish

publish(options: MqttPublishOptions): Promise

发布消息。

参数:

参数名 类型 必填 说明
options MqttPublishOptions 参考MqttPublishOptions

返回值:

类型 说明
Promise<MqttResponse> 以Promise形式返回发布的结果。

示例:

    let publishOption = {
        topic: "domotopic",
        qos: 1,
        payload: "haishangdebing",
    }
    this.mqttAsyncClient.publish(publishOption, (data: MqttResponse) => {
        console.log("mqtt publish success "+ JSON.stringify(data));
    }).catch((err: MqttResponse) => {
        console.log("mqtt publish fail "+ JSON.stringify(err));
    })

    try{
        let result: MqttResponse = await this.mqttAsyncClient.publish(publishOption)
        console.log("mqtt publish success "+ JSON.stringify(result));
    }catch(err){
        console.log("mqtt publish fail "+ JSON.stringify(err));
    }

subscribe

subscribe(options: MqttSubscribeOptions, callback: AsyncCallback): void

订阅主题。

参数:

参数名 类型 必填 说明
options MqttSubscribeOptions 参考MqttSubscribeOptions
callback AsyncCallback< MqttResponse > 回调函数

示例:

    let subscribeOption = {
        topic: "domotopic",
        qos: 2
    }
    this.mqttAsyncClient.subscribe(subscribeOption, (err: Error, data: MqttResponse) => {
        // to do Something
    });

subscribe

subscribe(options: MqttSubscribeOptions): Promise

订阅主题。

参数:

参数名 类型 必填 说明
options MqttSubscribeOptions 参考MqttSubscribeOptions

返回值:

类型 说明
Promise<MqttResponse> 以Promise形式返回订阅的结果。

示例:

    let subscribeOption = {
        topic: "domotopic",
        qos: 2
    }
    this.mqttAsyncClient.subscribe(subscribeOption).then((data: MqttResponse) => {
        console.log("mqtt subscribe success "+ JSON.stringify(result));
    }).catch((err: MqttResponse) => {
        console.log("mqtt subscribe fail "+ JSON.stringify(err));
    })

    try{
        let result: MqttResponse = await this.mqttAsyncClient.subscribe(subscribeOption)
        console.log("mqtt subscribe success "+ JSON.stringify(result));
    }catch(err){
        console.log("mqtt subscribe fail "+ JSON.stringify(err));
    }

unsubscribe

unsubscribe(options: MqttSubscribeOptions, callback: AsyncCallback): void

取消订阅。

参数:

参数名 类型 必填 说明
options MqttSubscribeOptions 参考MqttSubscribeOptions
callback AsyncCallback< MqttResponse > 回调函数

示例:

    let subscribeOption = {
        topic: "domotopic",
        qos: 2
    }
    this.mqttAsyncClient.unsubscribe(subscribeOption, (err: Error, data: MqttResponse) => {
         // to do Something
    });

unsubscribe

unsubscribe(options: MqttSubscribeOptions): Promise

取消订阅。

参数:

参数名 类型 必填 说明
options MqttSubscribeOptions 参考MqttSubscribeOptions

返回值:

类型 说明
Promise<MqttResponse> 以Promise形式返回取消订阅的结果。

示例:

    let subscribeOption = {
        topic: "domotopic",
        qos: 2
    }
    this.mqttAsyncClient.unsubscribe(subscribeOption).then((data: MqttResponse) => {
        console.log("mqtt unsubscribe success "+ JSON.stringify(result));
    }).catch((err: MqttResponse) => {
        console.log("mqtt unsubscribe fail "+ JSON.stringify(err));
    })

    try{
        let result: MqttResponse = await this.mqttAsyncClient.unsubscribe(subscribeOption)
        console.log("mqtt unsubscribe success "+ JSON.stringify(result));
    }catch(err){
        console.log("mqtt unsubscribe fail "+ JSON.stringify(err));
    }

messageArrived

messageArrived(callback: AsyncCallback): void

接收消息,使用此接口后,当订阅的主题有消息发布时,会自动接收到消息。

参数:

参数名 类型 必填 说明
callback AsyncCallback< MqttMessage > 回调函数

示例:

    this.mqttAsyncClient.messageArrived((err: Error, data: MqttMessage) => {
        // to do Something
    });

disconnect

disconnect(callback: AsyncCallback): void

断开连接。

参数:

参数名 类型 必填 说明
callback AsyncCallback< MqttResponse > 回调函数

示例:

    this.mqttAsyncClient.disconnect((err: Error, data: MqttResponse) => {
        // to do Something
    });

disconnect

disconnect(): Promise

断开连接。

返回值:

类型 说明
Promise<MqttResponse> 以Promise形式返回断开连接的结果。

示例:

    this.mqttAsyncClient.disconnect().then((data: MqttResponse) => {
        console.log("mqtt disconnect success "+ JSON.stringify(result));;
    }).catch((err: MqttResponse) => {
        console.log("mqtt disconnect fail "+ JSON.stringify(err));
    })

    try{
        let result: MqttResponse = await this.mqttAsyncClient.disconnect()
        console.log("mqtt disconnect success "+ JSON.stringify(result));
    }catch(err){
        console.log("mqtt disconnect fail "+ JSON.stringify(err));
    }

connectLost

connectLost(callback: AsyncCallback): void

当被动的断开连接后的回调(比如断网),可以在回调中尝试重新连接。

参数:

参数名 类型 必填 说明
callback AsyncCallback< MqttResponse > 回调函数

示例:

    this.mqttAsyncClient.connectLost((err: Error, data: MqttResponse) => {
        // to do Something
    });

isConnected

isConnected(): Promise

是否已连接。

返回值:

类型 说明
Promise 以Promise形式返回判断是否连接的结果。

示例:

    this.mqttAsyncClient.isConnected().then((data: boolean) => {
        console.log("result: "+data)
    });

    let result: boolean = await this.mqttAsyncClient.isConnected() //true or false

reconnect

reconnect(): Promise

重新连接(必须之前连接过)。

返回值:

类型 说明
Promise 以Promise形式返回重连的的结果。

示例:

    this.mqttAsyncClient.reconnect().then((data: boolean) => {
        console.log('result: ' + data)
    });

    let result: boolean = await this.mqttAsyncClient.reconnect() //true or false

destroy

destroy(): Promise

销毁客户端。

返回值:

类型 说明
Promise 以Promise形式返回销毁的结果。

示例:

    this.mqttAsyncClient.destroy().then((data: boolean) => {
        console.log('result: ' + data)
    });

    let result: boolean = await this.mqttAsyncClient.destroy() //true or false

setMqttTrace

setMqttTrace(level: MQTTASYNC_TRACE_LEVELS): void

设置hilog中跟踪信息的级别。

    this.mqttAsyncClient.setMqttTrace(6);

参数:

参数名 类型 必填 说明
level MQTTASYNC_TRACE_LEVELS 消息跟踪级别

MQTTASYNC_TRACE_LEVELS

消息跟踪级别

名称
MQTTASYNC_TRACE_MAXIMUM 1
MQTTASYNC_TRACE_MEDIUM 2
MQTTASYNC_TRACE_MINIMUM 3
MQTTASYNC_TRACE_PROTOCOL 4
MQTTASYNC_TRACE_ERROR 5
MQTTASYNC_TRACE_SEVERE 6
MQTTASYNC_TRACE_FATAL 7

MqttAsyncClientOptions

创建客户端可选参数的类型和可选范围

参数名 类型 必填 说明
url string 以null结尾的字符串,指定客户端将连接到的服务器。它采取的形式protocol://host:port.protocol必须是tcp、ssl、ws或wss。对于主机,可以指定IP地址或主机名。例如,tcp://localhost:1883
clientId string 客户端连接到服务器时传递给服务器的客户端标识符。它是一个以空结尾的UTF-8编码字符串
persistenceType PersistenceType 客户端使用的持久性类型,0=默认值:使用默认(基于文件系统)持久性机制。1=在内存持久性中使用。2=使用特定于应用程序的持久性实现

MqttConnectOptions

客户端连接服务器可选参数的类型和可选范围

参数名 类型 必填 默认值 说明
cleanSession boolean true 这是一个布尔值。设置控制客户端和服务器在连接和断开连接时的行为
connectTimeout number 30s 设置连接超时时间,默认
keepAliveInterval number 60s 保持活动间隔
serverURIs Array 客户端连接到的服务器url
retryInterval number 0 未确认的发布请求的时间间隔
sslOptions number 参考sslOptions
willOptions number 参考willOptions
MQTTVersion number 0 设置要在连接上使用的MQTT版本, 0=默认值:从3.1.1开始,如果失败,则返回到3.1,3=仅尝试版本3.1,4=仅尝试3.1.1版本
automaticReconnect boolean false 是否在连接丢失的情况下自动重新连接
minRetryInterval number 1s 以秒为单位的最小重试间隔。每次重试失败时加倍
maxRetryInterval number 60s 以秒为单位的最大重试间隔。重试失败时,加倍在此停止
userName string 用户名
password string 密码

sslOptions

ssl连接的可选参数的类型的可选的范围。

参数名 类型 必填 默认值 说明
enableServerCertAuth boolean false 是否启用服务器证书身份验证
verify boolean false 是否验证主机名
caPath string NULL 如果CApath不为NULL,则它指向包含PEM格式的CA证书的目录
trustStore string NULL PEM格式的文件,其中包含客户端信任的公共数字证书。它必须在设备中设置本地文件路径,并且必须可以访问该文件。
keyStore string NULL PEM格式的文件,包含客户端的公共证书链。它还可能包括客户端的私钥。它必须在设备中设置本地文件路径,并且必须可以访问该文件
privateKey string NULL 如果未包含在sslKeyStore中,则此设置指向PEM格式的文件,该文件包含客户端的私钥。它必须在设备中设置本地文件路径,并且必须可以访问该文件。
privateKeyPassword string NULL 如果加密,则加载客户端私钥的密码
enabledCipherSuites string “ALL” 客户端将在SSL握手期间呈现给服务器的密码套件列表。如果忽略此设置,其默认值将为“ALL”,即,将考虑所有密码套件,不包括不提供加密的套件

willOptions

定义客户机的MQTT“Last Will and Testament”(LWT)设置。如果客户端意外断开与服务器的连接,服务器将代表客户端将LWT消息发布到LWT主题。这允许其他客户端(订阅了LWT主题)知道客户端已断开连接。

参数名 类型 必填 默认值 说明
topicName string 主题名称
message string 发布的消息
retained boolean flase 是否保留此消息
qos QoS 0 LWT消息的服务质量设置

MqttSubscribeOptions

发布消息可选参数类型的可选范围

参数名 类型 必填 默认值 说明
topic string 主题名称
qos QoS 0 消息的服务质量设置 。

MqttPublishOptions

订阅主题的可选参数类型和可选范围

参数名 类型 必填 默认值 说明
topic string 主题名称
payload string 发布的消息
qos QoS 消息的服务质量设置
retained boolean flase 是否保留此消息
dup boolean flase 此消息是否重复,它仅在接收QoS1消息时才有意义
msgid number 0 消息标识符保留供MQTT客户机和服务器内部使用

MqttResponse

mqtt接口的返回值类型

参数名 类型 必填 说明
message string 返回接口调用信息 ,成功或失败
code number 如果返回值0,则操作成功。

MqttMessage

messageArrived接口的返回类型

参数名 类型 必填 说明
topic string 主题名称
payload string 发布的消息
qos QoS 消息的服务质量设置
retained number 是否保留此消息
dup number 此消息是否重复,它仅在接收QoS1消息时才有意义
msgid number 消息标识符保留供MQTT客户机和服务器内部使用

单元测试用例详情

约束与限制

在下述版本验证通过:

DevEco Studio: 4.1.3.500, SDK: API11 (4.1.0.63)

DevEco Studio: 4.0 Beta2(4.0.3.512), SDK: API10 (4.0.10.9)

DevEco Studio: 3.1 Beta2(3.1.0.400), SDK: API9 Release(3.2.12.2)

目录结构

|----ohos_mqtt  
|     |---- entry  # 示例代码文件夹
|     |---- ohos_Mqtt  # ohos_Mqtt库文件夹
|                |---- cpp # c/c++和napi代码
|                      |---- mqtt_napi # mqtt的napi逻辑代码
|                      |---- CMakeLists.txt  # 构建脚本
|                      |---- boundscheck # 子模块third_party_bounds_checking_function
|                      |---- paho.mqtt.c # 子模块paho.mqtt.c
|                |---- ets # 接口声明
|           |---- index.ets  # 对外接口
|     |---- README.md  # 安装使用方法                    

贡献代码

使用过程中发现任何问题都可以提 Issue 给我们,当然,我们也非常欢迎你给我们发 PR

开源协议

本项目基于 Eclipse Public License - v 2.0 ,请自由地享受和参与开源。

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Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation is the initial Agreement Steward. The Eclipse Foundation may assign the responsibility to serve as the Agreement Steward to a suitable separate entity. Each new version of the Agreement will be given a distinguishing version number. The Program (including Contributions) may always be Distributed subject to the version of the Agreement under which it was received. In addition, after a new version of the Agreement is published, Contributor may elect to Distribute the Program (including its Contributions) under the new version. 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