本文整理汇总了TypeScript中mqtt.MqttClient类的典型用法代码示例。如果您正苦于以下问题：TypeScript MqttClient类的具体用法？TypeScript MqttClient怎么用？TypeScript MqttClient使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了MqttClient类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: reject
const promise = new Promise<T>((resolve, reject) => {
this.channel.subscribe(this.TOPIC_RESPONSE, () => {
this.channel.on('message', (topic, buffer) => {
if (this.TOPIC_RESPONSE === topic) {
const message = buffer.toString()
const result = JSON.parse(message) as RemoteResult
if (result.error) {
reject(result.error)
} else if (result.value) {
resolve(result.value)
} else {
resolve()
}
}
})
this.channel.publish(this.TOPIC_REQUEST, JSON.stringify(command))
})
})示例2: Promise
await new Promise(async (resolve, reject) => {
const timeout = setTimeout(() => {
if (this.channel) {
this.channel.end()
}
reject(
new Error(
"Timed out after 30sec. Connection couldn't be established.",
),
)
}, 30000)
try {
const { endpointUrl, apiKey } = getEndpoint(this.options.remote)
const { body: { url, channelId } } = await got(endpointUrl, {
headers: apiKey
? {
'x-api-key': apiKey,
}
: undefined,
json: true,
})
this.channelId = channelId
this.TOPIC_NEW_SESSION = 'chrome/new-session'
this.TOPIC_CONNECTED = `chrome/${channelId}/connected`
this.TOPIC_REQUEST = `chrome/${channelId}/request`
this.TOPIC_RESPONSE = `chrome/${channelId}/response`
this.TOPIC_END = `chrome/${channelId}/end`
const channel = mqtt(url, {
will: {
topic: 'chrome/last-will',
payload: JSON.stringify({ channelId }),
qos: 1,
retain: false,
},
})
this.channel = channel
if (this.options.debug) {
channel.on('error', error => console.log('WebSocket error', error))
channel.on('offline', () => console.log('WebSocket offline'))
}
channel.on('connect', () => {
if (this.options.debug) {
console.log('Connected to message broker.')
}
channel.subscribe(this.TOPIC_CONNECTED, { qos: 1 }, () => {
channel.on('message', async topic => {
if (this.TOPIC_CONNECTED === topic) {
clearTimeout(timeout)
resolve()
}
})
channel.publish(
this.TOPIC_NEW_SESSION,
JSON.stringify({ channelId, options: this.options }),
{ qos: 1 },
)
})
channel.subscribe(this.TOPIC_END, () => {
channel.on('message', async (topic, buffer) => {
if (this.TOPIC_END === topic) {
const message = buffer.toString()
const data = JSON.parse(message)
if (data.outOfTime) {
console.warn(
`Chromeless Proxy disconnected because it reached it's execution time limit (5 minutes).`,
)
} else if (data.inactivity) {
console.warn(
'Chromeless Proxy disconnected due to inactivity (no commands sent for 30 seconds).',
)
} else {
console.warn(
`Chromeless Proxy disconnected (we don't know why).`,
data,
)
}
await this.close()
}
})
})
})
} catch (error) {
console.error(error)
reject(
new Error('Unable to get presigned websocket URL and connect to it.'),
)
//.........这里部分代码省略.........