isv-page-json-to-xtpl/lib/page-assets.js

abs 将页面 json 转换成 html

/**
 * 页面调试相关的处理逻辑
 */
'use strict';

let _ = require('lodash');
let req = require('request');
let Promise = require('bluebird');
let pageAssets = module.exports = {
  /**
   * 获取不存在的资源
   * @param content 页面内容
   */
  noExistAssetPaths: function*(content){
    let assetPaths = [];
    let scripts = pageAssets.getAssetsFromHtml('js',content,true);
    if(scripts.length){
      yield Promise.map(scripts,function(script){
        return pageAssets.getAssetContent(script).then(function(result){
          //不存在 asset 内容
          if(!result.success){
            assetPaths.push(result.path);
          }
        });
      })
    }
    return assetPaths;
  },
  /**
   * 从 html 中获取asset
   */
  getAssetsFromHtml: function(type,content,openCombo){
    let patt = type === 'js' && /<script[^>]+src=['"]([^'"]+)['"]+/g || /<link[^>]+href=['"]([^'"]+)['"]+/g;
    let temp;
    let assets = [];
    while( (temp= patt.exec(content)) != null ) {
      let url = temp[1];
      //解开combo
      if(openCombo){
        let aUrl = url.split('??');
        //带有combo的 url
        if(aUrl[1]){
          let modUrls = aUrl[1].split(',');
          _.each(modUrls,function(modUrl){
            assets.push(aUrl[0].replace(/\/$/,'')+'/'+modUrl);
          })
        }else{
          assets.push(url);
        }
      }else{
        assets.push(url);
      }
    }
    return assets;
  },
  /**
   * 获取 asset 内容
   * @param assetPath
   * @returns {*}
   */
  getAssetContent: function(assetPath){
    return new Promise(function(resolve, reject) {
      assetPath = assetPath.replace(/^\/\//, 'http://');
      req( {
        url: assetPath,
        headers: {
          'User-Agent': 'request'
        }
      }, function (error, response, body) {
        if (!error && response.statusCode == 200) {
          resolve({success:true,content:body,path:assetPath});
        }else{
          resolve({success:false,content:null,path:assetPath});
        }
      });
    });
  }
};