使用js函数格式化xml字符串带缩进

小程序：扫一扫查出行
【扫一扫了解最新限行尾号】
复制小程序

遇到了一个做soap的API的操作,中途需要说明xml的组装模式等,

如上图,组装产生的mxl代码药格式化并展示.由于是在前端做的,所以需要将字符串将xml进行格式化并输出,找到别人写的算法稍加更改并整理如下:

//格式化xml代码
function formateXml(xmlStr){
text = xmlStr;
//使用replace去空格
text = '\n' + text.replace(/(<\w+)(\s.*?>)/g,function($0, name, props){
return name + ' ' + props.replace(/\s+(\w+=)/g," $1");
}).replace(/>\s*?</g,">\n<");
//处理注释
text = text.replace(/\n/g,'\r').replace(//g,function($0, text){
var ret = '';
return ret;
}).replace(/\r/g,'\n');
//调整格式以压栈方式递归调整缩进
var rgx = /\n(<(([^\?]).+?)(?:\s|\s*?>|\s*?(\/)>)(?:.*?(?:(?:(\/)>)|(?:<(\/)\2>)))?)/mg;
var nodeStack = [];
var output = text.replace(rgx,function($0,all,name,isBegin,isCloseFull1,isCloseFull2 ,isFull1,isFull2){
var isClosed = (isCloseFull1 == '/') || (isCloseFull2 == '/' ) || (isFull1 == '/') || (isFull2 == '/');
var prefix = '';
if(isBegin == '!'){//!开头
prefix = setPrefix(nodeStack.length);
}else {
if(isBegin != '/'){///开头
prefix = setPrefix(nodeStack.length);
if(!isClosed){//非关闭标签
nodeStack.push(name);
}
}else{
nodeStack.pop();//弹栈
prefix = setPrefix(nodeStack.length);
}
}
var ret = '\n' + prefix + all;
return ret;
});
var prefixSpace = -1;
var outputText = output.substring(1);
//还原注释内容
outputText = outputText.replace(/\n/g,'\r').replace(/(\s*)/g,function($0, prefix, text){
if(prefix.charAt(0) == '\r')
prefix = prefix.substring(1);
text = unescape(text).replace(/\r/g,'\n');
var ret = '\n' + prefix + '';
return ret;
});
outputText=outputText.replace(/\s+$/g,'').replace(/\r/g,'\r\n');
return outputText;
}//计算头函数用来缩进
function setPrefix(prefixIndex) {
var result = '';
var span = ' ';//缩进长度
var output = [];
for(var i = 0 ; i < prefixIndex; ++i){
output.push(span);
}
result = output.join('');
return result;
}