如何解决从 http 请求响应中提取 JSON - Scrapy
网址如下:https://scrapingclub.com/exercise/detail_header/
我通过 chrome Dev Tools 找到了产品详细信息的 HTTP 请求链接。
这是我的代码
class quoteSpider(scrapy.Spider):
name = 'Practice'
start_urls = ['https://scrapingclub.com/exercise/detail_header/']
def parse(self,response):
yield scrapy.Request('https://scrapingclub.com/exercise/ajaxdetail_header/',callback = self.parse_detail,headers={'Accept': '*/*','Accept-Encoding': 'gzip,deflate,br','Accept-Language': 'es-ES,es;q=0.9,pt;q=0.8','Connection': 'keep-alive','Cookie': '__cfduid=da54d7e9c59cf35860825eabc96d7f1c41612805624; _ga=GA1.2.1229230175.1612805628; _gid=GA1.2.205529574.1613135874','Host': 'scrapingclub.com','Referer': 'https://scrapingclub.com/exercise/detail_header/','sec-ch-ua': '"Chromium";v="88","Google Chrome";v="88",";Not A Brand";v="99"','sec-ch-ua-mobile': '?0','Sec-Fetch-Dest': 'empty','sec-fetch-mode': 'cors','sec-fetch-site': 'same-origin','User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/88.0.4324.150 Safari/537.36','X-Requested-With': 'XMLHttpRequest'})
def parse_detail(self,response):
product = ProductClass()
data = response
# im still debugging so im not putting it into an item yet
# data = json.loads(response.text)
# product['product_name'] = data['title']
# product['detail'] = data['description']
# product['price'] = data['price']
yield {
'value' : data
}
当我跑步时
scrapy crawl ProductSpider -O test.json
[
{"value": "<TextResponse 200 https://scrapingclub.com/exercise/ajaxdetail_header/>"}
]
为什么不给我返回 JSON 内容?
解决方法
更改标题数据以获得预期的输出
class quoteSpider(scrapy.Spider):
name = 'Practice'
start_urls = ['https://scrapingclub.com/exercise/detail_header/']
def parse(self,response):
headers = {
'authority': 'scrapingclub.com','accept': '*/*','user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/88.0.4324.150 Safari/537.36','x-requested-with': 'XMLHttpRequest','sec-fetch-site': 'same-origin','sec-fetch-mode': 'cors','sec-fetch-dest': 'empty','referer': 'https://scrapingclub.com/exercise/detail_header/','accept-language': 'en-US,en;q=0.9','cookie': '__cfduid=d69d9664405f96c6477078a5c1fa78bb41613195439; _ga=GA1.2.523835360.1613195440; _gid=GA1.2.1763722170.1613195440',}
yield scrapy.Request('https://scrapingclub.com/exercise/ajaxdetail_header/',callback = self.parse_detail,headers=headers)
def parse_detail(self,response):
product = {}
data = response
# im still debugging so im not putting it into an item yet
data = json.loads(response.text)
product['product_name'] = data['title']
product['detail'] = data['description']
product['price'] = data['price']
yield product
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