OTA-远程升级组件（阿里云物联网平台）

硬件平台

open(Object option)

创建一个OTA实例。

入参

返回

OTA实例，返回空表示失败。

report(Object option)

上报版本号。

入参

返回

无。

OTA触发事件： new

上报属性

dowload(Object option, Function callback)

下载文件。

入参

返回

无。

verify(Object option, Function callback)

校验下载的文件。

入参

返回

无。

upgrade(Object option, Function callback)

新脚本覆盖和加载。

入参

返回

无。

sysUpgrade(Object option, Function callback)

系统固件升级，当module_name = system时调用此函数。

入参

返回

升级成功设备会重启，失败会返回非0值。

unpack(Object option, Function callback)

资源文件升级解包。

入参

返回

无。

failreport(Object option)

升级过程异常时，上报云端。

入参

返回

• 0：表示成功。

• 其他：表示失败。

示例代码

import * as network from 'network';
import * as iot from 'iot';
import * as appota from 'appota'
import * as fs from 'fs'

/* device info */
var productKey = '';      /* your productKey */
var deviceName = '';      /* your deviceName */
var deviceSecret = '';  /* your deviceSecret */
var app_module_name = 'default';
var default_ver = '1.0.0';
var resource_module_name = 'resource';
var resource_ver = '0.0.0';
var resource_ver_file_path = 'jsamp/resource.json';

var ota;
var device;
var status;

/* download info */
var info = {
  url: '',
  store_path:'jsamp/pack.bin', 
  install_path:'jsamp/', 
  unpack_path:'jsamp/',
  length: 0,
  hashType: '',
  hash: ''
}

function createDevice(){
  if (!(iot && iot.device)) {
    throw new Error("iot: [failed] require(\'iot\')");
  }
  console.log('iot: [success] require(\'iot\')');
  
  device = iot.device({
    productKey: productKey,
    deviceName: deviceName,
    deviceSecret: deviceSecret,
    region: 'cn-shanghai',
  });
  
  device.on('connect', function() {
    console.log('iot device connected success!');
    var iotDeviceHandle = device.getDeviceHandle();
    ota = appota.open(iotDeviceHandle);
    var res = ota.report({
      device_handle: iotDeviceHandle,
      product_key: productKey,
      device_name: deviceName,
      module_name: app_module_name,
      version: default_ver
    });
    console.log('report resource module ver!');
    var fsize = fs.fileSize(resource_ver_file_path);
    if (fsize <= 0) {
      resource_ver = '0.0.0';
    }
    else {
      console.log('==================');
      var resource_info_value = fs.readSync(resource_ver_file_path);
      var sver = JSON.parse(resource_info_value);
      console.log('resource ver ' + sver.version);
      resource_ver = sver.version;
    }
    var res = ota.report({
      device_handle: iotDeviceHandle,
      product_key: productKey,
      device_name: deviceName,
      module_name: resource_module_name,
      version: resource_ver
    });
    ota.on('new', function(res) {
      console.log('length is ' + res.length);
      console.log('module_name is ' + res.module_name);
      console.log('version is ' + res.version);
      console.log('url is ' + res.url);
      console.log('hash is ' + res.hash);
      console.log('hash_type is ' + res.hash_type);
      
      info.url = res.url;
      info.length = res.length;
      info.module_name = res.module_name;
      info.version = res.version;
      info.hash = res.hash;
      info.hashType = res.hash_type;
      
      if (info.module_name == 'system')
      {
        console.log('download system bin.');
        ota.sysUpgrade({
          length: info.length,
          hash_type: info.hashType,
          hash: info.hash,
          module_name: info.module_name,
          version: info.version,
          url: info.url
        }, function(res) {
          if (res >= 0) {
            console.log('system upgrade success');
          } else {
            console.log('system upgrade failed.');
          }
        })
      }
      else if (info.module_name == 'default') {
        ota.download({
          url: info.url,
          store_path: info.store_path
        }, function(res) {
          if (res >= 0) {
            console.log('verify start');
            console.log(info.hashType);
            ota.verify({
              length: info.length,
              hash_type: info.hashType,
              hash: info.hash,
              store_path: info.store_path
            }, function(res) {
              if (res >= 0) {
                ota.upgrade({
                  length: info.length,
                  store_path: info.store_path,
                  install_path: info.install_path
                }, function(res) {
                  if (res < 0) {
                    console.log('upgrade success')
                  }
                })
              } else {
                console.log('verify failed');
              }
            })
          } else {
            console.log('download failed');
          }
        });
      }
      else if (info.module_name == 'resource') {
        console.log('module name:  resource, begin download');
        ota.download({
          url: info.url,
          store_path: info.store_path
        }, function(res) {
          if (res >= 0) {
            console.log('resource verify start');
            console.log(info.hashType);
            ota.verify({
              length: info.length,
              hash_type: info.hashType,
              hash: info.hash,
              store_path: info.store_path
            }, function(res) {
              if (res >= 0) {
                ota.unpack({
                  length: info.length,
                  store_path: info.store_path,
                  unpack_path: info.unpack_path
                }, function(res) {
                  if (res >= 0) {
                    console.log('unpack success');
                    var new_fsize = fs.fileSize(resource_ver_file_path);
                    if (new_fsize <= 0) {
                      console.log('new resource file ' + resource_ver_file_path + 'size is 0');
                    }
                    else {
                      console.log('==================');
                      var new_info_value = fs.readSync(resource_ver_file_path);
                      console.log('new resource ' + new_info_value);
                      var new_ver = JSON.parse(new_info_value);
                      console.log('new resource ver ' + new_ver.version);
                      resource_ver = new_ver.version;
                    }
                    var res = ota.report({
                      device_handle: iotDeviceHandle,
                      product_key: productKey,
                      device_name: deviceName,
                      module_name: resource_module_name,
                      version: resource_ver
                    });
                  }
                  else {
                    console.log('unpack fail');
                  }
                })
              } else {
                console.log('resource verify failed');
              }
            });
          } else {
            console.log('resource download failed');
          }
        });
        console.log('resource download finish');
      }
    });
  })
}

var net=network.openNetWorkClient();
var status=net.getStatus();
console.log('net status is: '+status);

if (status=='connect') {
  createDevice();
}else{
  net.on('connect',function(){
    console.log('net is connected success!');
    createDevice();
  });
}