透傳/自定義產(chǎn)品的數(shù)據(jù)解析腳本需包含自定義Topic數(shù)據(jù)解析腳本和物模型數(shù)據(jù)解析腳本。本文提供完整的PHP語言示例腳本。
<?php
/*
示例數(shù)據(jù):
設(shè)備上報數(shù)據(jù):
傳入?yún)?shù):
0x0000000001003201
輸出結(jié)果:
{"method":"thing.event.property.post","id":"1","params":{"prop_int16":50,"prop_bool":1},"version":"1.0"}
屬性設(shè)置的返回結(jié)果:
傳入?yún)?shù):
0x0300223344c8
輸出結(jié)果:
{"code":"200","id":"2241348","version":"1.0"}
*/
function rawDataToProtocol($bytes)
{
$data = [];
$length = count($bytes);
for ($i = 0; $i < $length; $i++) {
$data[$i] = $bytes[$i] & 0xff;
}
$jsonMap = [];
$fHead = $data[0]; //command字段。
if ($fHead == 0x00) {
$jsonMap['method'] = 'thing.event.property.post'; //ALink JSON格式,屬性上報topic。
$jsonMap['version'] = '1.0'; //ALink JSON格式,協(xié)議版本號固定字段。
$jsonMap['id'] = '' . getInt32($data, 1); //ALink JSON格式,標(biāo)示該次請求id值。
$params = [];
$params['prop_int16'] = getInt16($data, 5); //對應(yīng)產(chǎn)品屬性中prop_int16。
$params['prop_bool'] = $data[7]; //對應(yīng)產(chǎn)品屬性中prop_bool。
$jsonMap['params'] = $params; //ALink JSON格式,params標(biāo)準(zhǔn)字段。
} else if ($fHead == 0x03) {
$jsonMap['version'] = '1.0'; //ALink JSON格式,協(xié)議版本號固定字段。
$jsonMap['id'] = '' . getInt32($data, 1); //ALink JSON格式,標(biāo)示該次請求id值。
$jsonMap['code'] = getInt8($data, 5);
}
return $jsonMap;
}
/*
示例數(shù)據(jù):
屬性設(shè)置:
傳入?yún)?shù):
{"method":"thing.service.property.set","id":"12345","version":"1.0","params":{"prop_int16":333, "prop_bool":1}}
輸出結(jié)果:
0x013039014d01
設(shè)備上報的返回結(jié)果:
傳入數(shù)據(jù):
{"method":"thing.event.property.post","id":"12345","version":"1.0","code":200,"data":{}}
輸出結(jié)果:
0x023039c8
*/
function protocolToRawData($json)
{
$method = $json['method'];
$id = $json['id'];
$version = $json['version'];
$payloadArray = [];
if ($method == 'thing.service.property.set') //屬性設(shè)置。
{
$params = $json['params'];
$prop_int16 = $params['prop_int16'];
$prop_bool = $params['prop_bool'];
//按照自定義協(xié)議格式拼接rawData。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(0x01))); //command字段。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(intval($id)))); //ALink JSON格式'id'。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex($prop_int16))); //屬性'prop_int16'的值。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex($prop_bool))); //屬性'prop_bool'的值。
} else if ($method == 'thing.event.property.post') { //設(shè)備上報數(shù)據(jù)返回結(jié)果。
$code = $json['code'];
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(0x02))); //command字段。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(intval($id)))); //ALink JSON格式'id'。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex($code)));
} else { //未知命令,對于這些命令不做處理。
$code = $json['code'];
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(0xff))); //command字段。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex(intval($id)))); //ALink JSON格式'id'。
$payloadArray = concat($payloadArray, hexStringToByteArray(toHex($code)));
}
return $payloadArray;
}
/*
示例數(shù)據(jù):
自定義Topic:
/user/update,上報數(shù)據(jù)。
輸入?yún)?shù):
topic: /{productKey}/{deviceName}/user/update
bytes: 0x000000000100320100000000
輸出參數(shù):
{
"prop_float": 0,
"prop_int16": 50,
"prop_bool": 1,
"topic": "/{productKey}/{deviceName}/user/update"
}
*/
function transformPayload($topic, $bytes)
{
$data = array();
$length = count($bytes);
for ($i = 0; $i < $length; $i++) {
$data[$i] = $bytes[$i] & 0xff;
}
$jsonMap = array();
if (strpos($topic, '/user/update/error') !== false) {
$jsonMap['topic'] = $topic;
$jsonMap['errorCode'] = getInt8($data, 0);
} else if (strpos($topic, '/user/update') !== false) {
$jsonMap['topic'] = $topic;
$jsonMap['prop_int16'] = getInt16($data, 5);
$jsonMap['prop_bool'] = $data[7];
}
return $jsonMap;
}
function getInt32($bytes, $index)
{
$array = array($bytes[$index], $bytes[$index + 1], $bytes[$index + 2], $bytes[$index + 3]);
return hexdec(byteArrayToHexString($array));
}
function getInt16($bytes, $index)
{
$array = array($bytes[$index], $bytes[$index + 1]);
return hexdec(byteArrayToHexString($array));
}
function getInt8($bytes, $index)
{
$array = array($bytes[$index]);
return hexdec(byteArrayToHexString($array));
}
function byteArrayToHexString($data)
{
$hexStr = '';
for ($i = 0; $i < count($data); $i++) {
$hexValue = dechex($data[$i]);
$tempHexStr = strval($hexValue);
if (strlen($tempHexStr) === 1) {
$hexStr = $hexStr . '0' . $tempHexStr;
} else {
$hexStr = $hexStr . $tempHexStr;
}
}
return $hexStr;
}
function hexStringToByteArray($hex)
{
$result = array();
$index = 0;
for ($i = 0; $i < strlen($hex) - 1; $i += 2) {
$result[$index++] = hexdec($hex[$i] . $hex[$i + 1]);
}
return $result;
}
function concat($array, $data)
{
return array_merge($array, $data);
}
function toHex($data)
{
$var = dechex($data);
$length = strlen($var);
if ($length % 2 == 1) {
$var = '0' . $var;
}
return $var;
}