SAX：js解析XML插件sax，能获得行号信息挺方便

最新推荐文章于 2024-10-09 09:32:09 发布

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本文介绍了一种使用SAX解析XML的方法，通过Node.js的sax模块，开发者能够轻松地处理XML文件，包括错误处理、文本获取及标签事件监听等。适用于前端XML编辑器中的数据验证和错误定位。

官网：https://www.npmjs.com/package/sax

github：https://github.com/isaacs/sax-js

此种方式可以非常方便的获取行号信息，很容易对XML定位出错，对于前端XML编辑器，对XML数据进行校验，定位到出错行非常方便。

使用方法：

Usage
var sax = require("./lib/sax"),
  strict = true, // set to false for html-mode 
  parser = sax.parser(strict);
 
parser.onerror = function (e) {
  // an error happened. 
};
parser.ontext = function (t) {
  // got some text.  t is the string of text. 
};
parser.onopentag = function (node) {
  // opened a tag.  node has "name" and "attributes" 
};
parser.onattribute = function (attr) {
  // an attribute.  attr has "name" and "value" 
};
parser.onend = function () {
  // parser stream is done, and ready to have more stuff written to it. 
};
 
parser.write('<xml>Hello, <who name="world">world</who>!</xml>').close();
 
// stream usage 
// takes the same options as the parser 
var saxStream = require("sax").createStream(strict, options)
saxStream.on("error", function (e) {
  // unhandled errors will throw, since this is a proper node 
  // event emitter. 
  console.error("error!", e)
  // clear the error 
  this._parser.error = null
  this._parser.resume()
})
saxStream.on("opentag", function (node) {
  // same object as above 
})
// pipe is supported, and it's readable/writable 
// same chunks coming in also go out. 
fs.createReadStream("file.xml")
  .pipe(saxStream)
  .pipe(fs.createWriteStream("file-copy.xml"))