Плагин HTTP-Client



  • Участник @alesle написал в Плагин HTTP-Client:

    но дело в том что нет уверенности что эти данные всгда будут на этом месте. > А вот "name": "S6" будет всегда.

    Если "name": "S6" будет всегда, то можно так:

    data.onew_temp.filter(item => item.name=="S6")[0].t
    


  • Блин, работает!!!
    Я правда нифига не вкурил как , но - работает!!!
    Буду разбираться..
    Спасибо огромное!



  • @alesle пожалуйста 🙂
    Вот вариант еще короче

    data.onew_temp.find(item => item.name=="S6").t
    

    Современный javascript мощный и гибкий язык, особенно если использовать синтаксис ES6 (или ES2015, что одно и то же) , в данном случае стрелочные функции.
    Магия этих выражений раскрывается в 2 шага

    1. Массивы в JS имеют встроенные методы для поиска по заданному критерию, в частности filter, find

      • find - ищет первый элемент массива, возвращает найденный объект
      • filter - сюрприз 🙂 - фильтрует входной массив и возвращает все найденные элементы (learn.javascript.ru/array-methods)
    2. Методу нужно передать критерий отбора - функцию для обработки элемента массива.

      Если писать, используя синтаксис классических функций, то получится так:

       arr.filter( function (item) {
         return item.name == 'S6';  
      });
      

      Функция вызывается по очереди для каждого элемента массива (item), если возвращает true, то элемент берется в новый массив

      С введением в ES6 стрелочных функций все стало компактнее:

       function (item) {return item.name == 'S6';} 
      

      можно заменить на

       (item)  => item.name == 'S6' 
      

      Что произошло

    • убрали function
    • грубо говоря return заменили на =>
    • если входной аргумент ровно один - то и скобки можно не ставить

    Подробнее https://learn.javascript.ru/arrow-functions
    Получаем:

     arr.filter( item => item.name == 'S6' );
    

    Ну и надо иметь в виду, что возвращает метод массива.
    Если результат - массив, то берем свойство его первого элемента

    data.onew_temp.filter(item => item.name=="S6")[0].t
    

    Если результат - объект, то просто берем свойство t

    data.onew_temp.find(item => item.name=="S6").t
    


  • Спасибо за доходчивое объяснение!



  • Здравствуйте.
    А как действовать, если веб страница скриптами заполняется?
    Выглядит так
    alt text
    а внутри
    Текст ссылки

    Как вытащить, например, напряжение на входе?



  • @Erik а SNMP у него нет?



  • @homa

    В него нужно какую то плату вставить, а я их в продаже не нашел.
    Без платы нет.
    Подключается по USB к компьютеру, и через веб-сервер на этом компьютере можно смотреть и настраивать хоть локально, хоть с другого ПК.



  • @Erik Добрый день, обычно в таком случае в отладчике хрома, в разделе network можно найти запросы типа JSON



  • @dev
    там только xhr
    alt text



  • @Erik Добрый день, reqMonitorData похоже он и есть, можно выбрать любой запрос и посмотреть вкладку response



  • там

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mode"}}
    

    есть "inputVoltage":"241.0",



  • @Erik Добрый день, там приходит объект, в workInfo есть все необходимое. Для удобства воспользуйтесь сервисом, вставьте текст в левую колонку и нажмите COPY >

    Снимок экрана 2020-02-25 в 13.16.44.png

    • удалены ненужные поля для наглядности


  • Пользователь @Erik написал в Плагин HTTP-Client:

    inputVoltage

    Я и более простое не понимаю.
    Со стороны плагина.
    url ставлю http://192.168.13.33:15178/ViewPower/monitor?805
    метод запроса get?

    Канал
    выбираю аналоговый актуатор (создал InputV)
    тип обработки - json
    извлечение данных json что писать? inputVoltage?



  • @Erik Добрый день, для начала нужно уточнить, есть ли у веб интерфейса форма авторизации ?



  • @dev
    есть, но показывает и без авторизации.
    авторизация для настройки нужна.



  • @Erik Добрый день, все верно,
    Вы попробуйте еще в инкогнито открыть http://192.168.13.33:15178/ViewPower/monitor?805 если данные отображаются, то настраивайте дальше:
    запрос - GET
    URL - http://192.168.13.33:15178/ViewPower/monitor?805
    тип обработки - json
    извлечение данных json - data.workInfo.inputVoltage

    data - ваш объект (корень) дальше через точку обращаетесь к кусту с именем



  • Пользователь @dev написал в Плагин HTTP-Client:

    data.workInfo.inputVoltage

    инкогнито показывает, так настроил, но значение не присваивает актуатору. Остается 0 всегда.



  • @Erik Добрый день, нужно в отладчике смотреть



  • Пользователь @dev написал в Плагин HTTP-Client:

    @Erik Добрый день, нужно в отладчике смотреть

    вот

    25.02 13:44:41.169 IH: get [ { dn: 'ACTORA81',
        err: 'Unexpected token < in JSON at position 4' } ]
    set { ACTORA81: { err: 'Unexpected token < in JSON at position 4' } }
    


  • @Erik попробуйте пока просто data В настройках плагина поставьте уровень сообщений высокий


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