Question

我正在使用节点可读性模块来清理文章。但在大多数情况下，文章的主要图像不是抓取内容的一部分。因此，我在helpers.js和readability.js文件中进行了一些更改，以获取文章的主要图像，将其从DOM对象中删除并最终将图像添加到articleContent。代码：

helpers.js

var grabImage = module.exports.grabImage = function(document) {
var images = document.getElementsByTagName('IMG');
var MINIMUM_SURFACE =  100*100;
 if (images.length > 0) { 
for (var i = 0; i < images.length; ++i) {
  var image = images[i];
   if ( image.getAttribute('data-src') ) {
                image.getAttribute('src') = image.getAttribute('data-src');
            }
            if ( image.getAttribute('data-lazy-src') ) {
                image.getAttribute('src') = image.getAttribute('data-lazy-    src');
            }
             if ( !image.getAttribute('src') ) {
                continue;
            }

            // //Compute surface
            // var w = image.getAttribute('width') || 1;
            // var h = image.getAttribute('height') || 1;
            // image.surface = w * h;
var image = new Image();
            image.onload = function() {
            var image.surface = this.width*this.height;
                }



             //Filter by size
             if ( image.surface > MINIMUM_SURFACE ) {
             var mainImageSrc = image.getAttribute('src');

                 //Resolve relative url
                 if (!mainImageSrc.match(/^http/)) {
                                 if (!image.ownerDocument.originalURL) {

                                      } else{
                      mainImageSrc = url.resolve(image.ownerDocument.originalURL, mainImageSrc);
                    }
                  }
                  image.parentNode.removeChild(image);
                break;
            }

   }
  }
  return mainImageSrc;
};

readability.js

var mainImgUrl = helpers.grabImage(this._document);
var img = this._document.createElement("IMG");
img.setAttribute('src',  mainImgUrl); 
articleContent.insertBefore(img, articleContent.childNodes[0] );

我在此函数

中添加了以上部分代码

Readability.prototype.getContent = function(notDeprecated) {

但是，它没有用。正在抓取整个内容，但我收到此错误

> Cleaning Conditionally [object HTMLDivElement] (image width-494:)
Cleaning Conditionally [object HTMLDivElement] (:)
fixed link
C:\Users\SAI\reader-rest\routes\api.js:19
                var content = '<html><head><meta charset="utf-8"><title>'+articl
e.title+'</title></head><body>' +article.content+'</body></html>';







 TypeError: Cannot read property 'title' of undefined
    at C:\Users\SAI\reader-rest\routes\api.js:19:78
    at Object.jsdom.env.done (C:\Users\SAI\reader-rest\node_modules\node-readabi
    lity\src\readability.js:292:18)
    at C:\Users\SAI\reader-rest\node_modules\node-readability\node_modules\jsdom
    \lib\jsdom.js:259:18
    at nextTickCallbackWith0Args (node.js:420:9)
    at process._tickCallback (node.js:349:13)
    typeerror: Cannot read property 'title' of undefined    at      C:\Users\SAI\reader-rest\routes\api.js:19:78    at Object.jsdom.env.done (C:\Users\SAI\reader-rest\node_modules\node-readability\src\readability.js:292:18)    at C:\Users\SAI\reader-rest\node_modules\node-readability\node_modules\jsdom\lib\jsdom.js:259:18    at nextTickCallbackWith0Args (node.js:420:9)    at process._tickCallback (node.js:349:13)

有人可以帮我解决这个问题。

我在github上发布了相同的内容。但没有回应。 https://github.com/luin/readability/issues/52

抓住文章的主要形象

0 个答案: