javascript 解析SECS gem 报文
方便小白理解secs gem报文解析，不能理解的代码需要阅读semi手册，手册E5-0200-SECS-II自行百度1. 协议手册参考SEMI E5官方文档：image.png
2.效果：image.png
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<!-- vue -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<!-- element引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<!-- element引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<!--Axios-->
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
<div id="App">
<div style="margin-top: 15px;">
<el-input placeholder="请输入内容" size="small" v-model="BodyMessage" class="input-with-select">
<el-switch v-model="isHeadMeaasge" slot="prepend" active-text="包含头报文" inactive-text="不包含头报文">
</el-switch>
<el-button slot="append" icon="el-icon-search" @click.prevent.stop="but1"></el-button>
</el-input>
<div>
<p style="white-space: pre-wrap;">{{ showlog }}</p>
</div>
</div>
</div>
</body>
<script>
class Logger {
constructor() {
this.indentationLevel = 0;
this.logContainer = '';
}
Indent() {
this.indentationLevel++;
}
Unindent() {
if (this.indentationLevel > 0) {
this.indentationLevel--;
}
}
Print(message) {
let spaces = " ".repeat(this.indentationLevel * 3);
console.log(spaces + message);
this.logContainer += spaces + message + '\n'
}
ShowLog(){
return this.logContainer;
}
clear(){
this.logContainer = '';
}
}
var vm = new Vue({
el: "#App",
data: {
BodyMessage: '',
isHeadMeaasge: false,
SECSFormat: {
Ascii: 'Ascii',
Binary: 'Binary',
Boolean: 'Boolean',
F4: 'F4',
F8: 'F8',
I1: 'I1',
I2: 'I2',
I4: 'I4',
I8: 'I8',
List: 'List',
U1: 'U1',
U2: 'U2',
U4: 'U4',
U8: 'U8',
Char: 'Char',
UNRECOGNIZE_FORMAT: 'UNRECOGNIZE_FORMAT'
},
log: new Logger(),
showlog: '',
},
created() {
},
mounted() {
},
methods: {
but1() {
this.log.clear();
this.InMsg(this.hexStringToUint8Array(this.BodyMessage), false, this.isHeadMeaasge)
console.log(this.log.ShowLog());
this.showlog = this.log.ShowLog();
},
/**
*
* @Param {number} decimalValue 十进制值
* @param {number} numBits 要求返回8位的二进制
* @returns
*/
decimalToBinary(decimalValue, numBits) {
// 将十进制数转换为二进制字符串
var binaryString = parseInt(decimalValue).toString(2);
// 如果二进制字符串的长度小于指定位数，则在前面补零，使其长度达到指定位数
while (binaryString.length < numBits) {
binaryString = '0' + binaryString;
}
return binaryString;
},
/**
*
* @param {number} bits 8位的二进制
* @param {number} start 开始索引
* @param {number} end 结束索引
* @returns
*/
AssembleBits(bits, index, length) {
var stringBuilder = "";
for (var i = index; i < index + length; i++) {
stringBuilder += bits.charAt(i);
}
return stringBuilder;
},
ReverseByte(buffer) {
var array = new Uint8Array(buffer.length);
for (var i = 0; i < buffer.length; i++) {
array = buffer;
}
return array;
},
/**
*
* @param { 0x } hexString
* @returns
*/
hexStringToUint8Array(hexString) {
// 将十六进制字符串拆分为十六进制数字数组
//const hexArray = hexString.split(' ');
const hexArray = hexString.split(/\s+/).filter(Boolean);
// 将十六进制数字转换为字节值，并存储在 Uint8Array 中
const bytes = new Uint8Array(hexArray.map(hex => parseInt(hex, 16)));
return bytes;
},
GetFormat(formatCode, formatLength) {
var bytes = new Uint8Array();
var bits = this.decimalToBinary(bytes, 8);
var length = this.AssembleBits(bits, 6, 8)
switch (length) {
case "01":
formatLength = 1;
break;
case "10":
formatLength = 2;
break;
case "11":
formatLength = 3;
break;
}
var text = this.AssembleBits(bits, 0, 6);
var result = this.SECSFormat.UNRECOGNIZE_FORMAT;
switch (text) {
case "000000":
result = this.SECSFormat.List;
break;
case "001000":
result = this.SECSFormat.Binary;
break;
case "001001":
result = this.SECSFormat.Boolean;
break;
case "010000":
result = this.SECSFormat.Ascii;
break;
case "010010":
result = this.SECSFormat.Char;
break;
case "011000":
result = this.SECSFormat.I8;
break;
case "011001":
result = this.SECSFormat.I1;
break;
case "011010":
result = this.SECSFormat.I2;
break;
case "011100":
result = this.SECSFormat.I4;
break;
case "100000":
result = this.SECSFormat.F8;
break;
case "100100":
result = this.SECSFormat.F4;
break;
case "101000":
result = this.SECSFormat.U8;
break;
case "101001":
result = this.SECSFormat.U1;
break;
case "101010":
result = this.SECSFormat.U2;
break;
case "101100":
result = this.SECSFormat.U4;
break;
default:
result = this.SECSFormat.UNRECOGNIZE_FORMAT;
break;
case "010001":
break;
}
return result;
},
MessageHeader(header) {
let bytes = header.subarray(2, 3);
var bitArray = this.decimalToBinary(bytes, 8);
var wait = bitArray.charAt(0)
var streamID = 0;
var functionID = 0;
if (wait == '1') {
streamID = header - 128;
wait = 'W'
} else {
streamID = header;
wait = ''
}
functionID = header;
return { 'streamID': streamID, 'functionID': functionID, 'wait': wait }
}
,
InMsg(message, Messagelength, MessageHead) {
if (Messagelength) {
message = message.slice(4);
}
if (MessageHead) {
const headBytes = message.subarray(0, 10);
var resultHead = this.MessageHeader(headBytes)
this.log.Print("S" + resultHead.streamID + "F" + resultHead.functionID + " " + resultHead.wait);
message = message.slice(10);
}
let index = 0;
let formatLength = 1;
while (index < message.length) {
let incrementer = 0;
let formatCode = message;
let format = this.GetFormat(formatCode, formatLength);
index++;
let length;
switch (format) {
case this.SECSFormat.List: {
length = message;
if (length === 0) {
return;
}
index++;
this.log.Print("<L[" + length + "]");
this.log.Indent();
var result = this.InMsgChild(message, index, incrementer, length);
index = result.index;
incrementer = result.incrementer;
length = result.length;
this.log.Unindent();
this.log.Print(">");
break;
}
case this.SECSFormat.UNRECOGNIZE_FORMAT:
console.log("UNRECOGNIZE_FORMAT");
return;
default: {
length = message;
index++;
let array = new Uint8Array(length);
for (let i = 0; i < length; i++) {
array = message;
}
if (array.length === 0) {
this.log.Print("<" + format + "[" + 0 + "] " + '' + ">");
} else if (format === this.SECSFormat.Binary) {
if (array.length === 1) {
let b = array;
} else {
console.log(array)
}
this.log.Print("<" + format + "[" + array.length + "] " + Array.from(array).map(byte => byte.toString(16).padStart(2, '0')).join(' ') + ">");
} else {
let SECSValue = this.GetMessageValue(format, array);
if (format === this.SECSFormat.Ascii) {
this.log.Print("<" + format + "[" + SECSValue.toString().length + "] '" + SECSValue + "'>");
} else {
this.log.Print("<" + format + "[" + SECSValue.toString().length + "] " + SECSValue + ">");
}
}
break;
}
}
if (incrementer !== length) {
index += length;
}
}
}
,
InMsgChild(message, index, incrementer, length) {
let length2 = 0;
let formatLength = 1;
while (index < message.length && incrementer < length) {
let incrementer2 = 0;
let formatCode = message;
let format = this.GetFormat(formatCode, formatLength);
switch (format) {
case this.SECSFormat.List:
index++;
length2 = message;
index++;
this.log.Print("<L[" + length2 + "]");
this.log.Indent();
var result = this.InMsgChild(message, index, incrementer2, length2);
index = result.index;
incrementer2 = result.incrementer;
length2 = result.length;
this.log.Unindent();
this.log.Print(">");
incrementer++;
break;
case this.SECSFormat.UNRECOGNIZE_FORMAT:
return;
default:
incrementer++;
index++;
let array = new Uint8Array(formatLength);
array.set(message.slice(index, index + formatLength), 0);
array = this.ReverseByte(array);
if (array.length === 1) {
length2 = array;
} else if (array.length === 2) {
let value = new Int16Array(array.buffer);
length2 = value;
}
index += formatLength;
let array2 = new Uint8Array(length2);
array2.set(message.slice(index, index + length2), 0);
if (array2.length === 0) {
this.log.Print("<" + format + "[" + 0 + "] " + '' + ">");
} else if (format === this.SECSFormat.Binary) {
if (array2.length === 1) {
let b = array2;
} else {
console.log(array)
}
this.log.Print("<" + format + "[" + array2.length + "] " + Array.from(array2).map(byte => byte.toString(16).padStart(2, '0')).join(' ') + ">");
} else {
let SECSValue = this.GetMessageValue(format, array2);
if (format === this.SECSFormat.Ascii) {
this.log.Print("<" + format + "[" + SECSValue.toString().length + "] '" + SECSValue + "'>");
} else {
this.log.Print("<" + format + "[" + SECSValue.toString().length + "] " + SECSValue + ">");
}
}
break;
}
if (incrementer2 !== length2) {
index += length2;
}
}
return { 'index': index, 'incrementer': incrementer, 'length': length }
}
,
GetMessageValue(formatCode, message) {
let obj = null;
switch (formatCode) {
case this.SECSFormat.Ascii:
obj = String.fromCharCode.apply(null, message);
break;
case this.SECSFormat.Boolean:
obj = !!message;
break;
case this.SECSFormat.Char:
obj = String.fromCharCode(message);
break;
case this.SECSFormat.F4:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getFloat32(0, true);
break;
case this.SECSFormat.F8:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getFloat64(0, true);
break;
case this.SECSFormat.I1:
message = this.ReverseByte(message);
let b2 = message;
obj = (b2 <= 127) ? b2 : (b2 - 256);
break;
case this.SECSFormat.I2:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getInt16(0, true);
break;
case this.SECSFormat.I4:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getInt32(0, true);
break;
case this.SECSFormat.I8:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getBigInt64(0, true);
break;
case this.SECSFormat.U1:
message = this.ReverseByte(message);
let b = message;
obj = b;
break;
case this.SECSFormat.U2:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getUint16(0, true);
break;
case this.SECSFormat.U4:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getUint32(0, true);
break;
case this.SECSFormat.U8:
message = this.ReverseByte(message);
obj = new DataView(new Uint8Array(message).buffer).getBigUint64(0, true);
break;
}
return obj.toString();
},
}
})
</script>
</html>
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