问题
I'm trying to get data from a site using Ajax. The page loads and then Javascript requests the content. See this page for details: https://www.tele2.no/mobiltelefon.aspx
The problem is that when i try to simulate this process by calling this url: https://www.tele2.no/Services/Webshop/FilterService.svc/ApplyPhoneFilters
I get a 400 response telling me that the request is not allowed. This is my code:
# -*- coding: utf-8 -*-
import scrapy
import json
class Tele2Spider(scrapy.Spider):
name = "tele2"
#allowed_domains = ["tele2.no/mobiltelefon.aspx"]
start_urls = (
'https://www.tele2.no/mobiltelefon.aspx/',
)
def parse(self, response):
url = 'https://www.tele2.no/Services/Webshop/FilterService.svc/ApplyPhoneFilters'
my_data = "{filters: []}"
req = scrapy.Request( url, method='POST', body=json.dumps(my_data), headers={'X-Requested-With': 'XMLHttpRequest','Content-Type':'application/json'}, callback=self.parser2)
yield req
def parser2(self, response):
print "test"
I'm new to scrapy and python so there might be something obvious I'm missing
回答1:
The key problem is in missing quotes around the filters
in the body:
url = 'https://www.tele2.no/Services/Webshop/FilterService.svc/ApplyPhoneFilters'
req = scrapy.Request(url,
method='POST',
body='{"filters": []}',
headers={'X-Requested-With': 'XMLHttpRequest',
'Content-Type': 'application/json; charset=UTF-8'},
callback=self.parser2)
yield req
Or, you can define it as a dictionary and then call json.dumps()
to dump it to a string:
params = {"filters": []}
req = scrapy.Request(url,
method='POST',
body=json.dumps(params),
headers={'X-Requested-With': 'XMLHttpRequest',
'Content-Type': 'application/json; charset=UTF-8'},
callback=self.parser2)
As a proof, here is what it is giving me on the console:
2014-12-30 12:30:38-0500 [tele2] DEBUG: Crawled (200) <GET https://www.tele2.no/mobiltelefon.aspx/> (referer: None)
2014-12-30 12:30:42-0500 [tele2] DEBUG: Crawled (200) <POST https://www.tele2.no/Services/Webshop/FilterService.svc/ApplyPhoneFilters> (referer: https://www.tele2.no/mobiltelefon.aspx/)
test
来源:https://stackoverflow.com/questions/27709422/scrapy-simulate-xhr-request-returning-400