如何从网站获取javascript动态内容

我正在尝试从网站获取动态内容

我试着满足于scrapy。但内容是用js文件加载的。所以它不是进入文本

然后我为此安装了selenium，但现在我没有收到这样的会话错误

例如，这是我试图获取内容的页面

我只是试着在这个网站上写下这个

item = ProductItem
        name = response.css('h1.product-name::text').extract_first()
        price = response.css('span[id=offering-price] > span::text').extract_first()
        xpath = response.xpath('/html/head/script[17]')
        data = xpath.re(" = (\{.+\})")
        print(data)

这就是我想要得到的内容

 var utagData = {"merchant_names":["Finspor"],"new_site":"new","order_store":"Finspor","order_currency":"TRY","page_domain":"www.hepsiburada.com","page_language":"tr-TR","page_site_name":"Hepsiburada","page_site_region":"tr","site_type":"desktop","page_type":"pdp","page_name":"Product Detail","category_path":"/product/spor-outdoor/spor-fitness/fitness-kondisyon/kosu-bantlari/sporkonksbfox008/","page_title":"Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Fiyatı","page_url":"http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-p-SPORKONKSBFOX0081?magaza=Finspor","page_referring_url":"http://www.hepsiburada.com/gunun-firsati-teklifi?element=1","page_query_string":["magaza=Finspor"],"is_canonical":"1","canonical_url":"http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-pm-sporkonksbfox008","product_prices":["999.00"],"product_unit_prices":["999.00"],"product_brands":["Fox Fitness"],"product_brand":"Fox Fitness","product_skus":["SPORKONKSBFOX0081"],"product_ids":["sporkonksbfox008"],"product_top_5":["sporkonksbfox008"],"product_names":["Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Bandı (Hediye Seçenekleriyle)"],"product_category_ids":["19249"],"product_categories":["kosu-bantlari"],"shipping_type":["super-hizli"],"product_quantities":["1"],"product_barcodes":["8691128100776"],"product_barcode":"8691128100776","product_name_array":"Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Bandı (Hediye Seçenekleriyle)","merchant_ids":["95df0e3483104fc1a16cca6e38bc45cc"],"order_subtotal":["999.00"],"category_id_hierarchy":"60001546 > 2147483635 > 353045 > 19249","category_name_hierarchy":"Spor Outdoor > Spor / Fitness > Fitness - Kondisyon > Koşu Bantları","product_status":"InStock"};
    var utagObject = utagData;
    var utag_data = {"merchant_names":["Finspor"],"new_site":"new","order_store":"Finspor","order_currency":"TRY","page_domain":"www.hepsiburada.com","page_language":"tr-TR","page_site_name":"Hepsiburada","page_site_region":"tr","site_type":"desktop","page_type":"pdp","page_name":"Product Detail","category_path":"/product/spor-outdoor/spor-fitness/fitness-kondisyon/kosu-bantlari/sporkonksbfox008/","page_title":"Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Fiyatı","page_url":"http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-p-SPORKONKSBFOX0081?magaza=Finspor","page_referring_url":"http://www.hepsiburada.com/gunun-firsati-teklifi?element=1","page_query_string":["magaza=Finspor"],"is_canonical":"1","canonical_url":"http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-pm-sporkonksbfox008","product_prices":["999.00"],"product_unit_prices":["999.00"],"product_brands":["Fox Fitness"],"product_brand":"Fox Fitness","product_skus":["SPORKONKSBFOX0081"],"product_ids":["sporkonksbfox008"],"product_top_5":["sporkonksbfox008"],"product_names":["Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Bandı (Hediye Seçenekleriyle)"],"product_category_ids":["19249"],"product_categories":["kosu-bantlari"],"shipping_type":["super-hizli"],"product_quantities":["1"],"product_barcodes":["8691128100776"],"product_barcode":"8691128100776","product_name_array":"Fox Fitness New Target 70E 2.5 Hp Motorlu, Masajlı Koşu Bandı (Hediye Seçenekleriyle)","merchant_ids":["95df0e3483104fc1a16cca6e38bc45cc"],"order_subtotal":["999.00"],"category_id_hierarchy":"60001546 > 2147483635 > 353045 > 19249","category_name_hierarchy":"Spor Outdoor > Spor / Fitness > Fitness - Kondisyon > Koşu Bantları","product_status":"InStock"};

---

这里不需要执行任何javascript。如果在页面上单击鼠标右键，然后单击“查看页面源代码”（或类似内容），您可以在那里找到json格式的数据：

# assuming we're crawling:
# 'http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-p-SPORKONKSBFOX0081?magaza=Finspor'

import json

def parse(self, response):
    # get the java-script in the <script> node
    node = response.xpath("//script[contains(text(),'var utagData = ')]/text()")
    # extract the json bit from the script text with regex 
    data = node.re('= (\{.+\})')[0]
    # convert json to python dictionary
    data = json.loads(data)
    print(data)
    print(data['merchant_names'])
    # gives ['Finspor']

#假设我们正在爬行：
# 'http://www.hepsiburada.com/fox-fitness-new-target-70e-2-5-hp-motorlu-masajli-kosu-bandi-hediye-secenekleriyle-p-SPORKONKSBFOX0081?magaza=Finspor'
导入json
def解析（自我，响应）：
#在节点中获取java脚本
node=response.xpath（//script[contains（text（），'var utagData='）]/text（））
#使用正则表达式从脚本文本中提取json位
data=node.re（'=（\{.+\}）[0]
#将json转换为python字典
data=json.load（数据）
打印（数据）
打印（数据[“商户名称]）
#给出['Finspor']

过去，我使用此库对网站进行爬网，并获取我需要的内容：

它有很好的API来查找您需要的具体数据：

//get title
xray('http://google.com', 'title')(function(err, title) {
  console.log(title);
})

或通过查找器查找：

xray('http://reddit.com', '.content')(function(err, innerHTML) {
    console.log(innerHTML);
})

获取具体属性值：

xray('http://techcrunch.com', 'img.logo@src')(function(err, value) {
    console.log(value);
})

---

所以请看看这个图书馆。也许它可以帮助您获得所需的结果。

您没有显示selenium代码（您应该从中获得响应）