how to get status code other than 200 from scrapy-splash - python-3.x

Question

I am trying to get request status code with scrapy and scrapy-splash,below is spider code.
class Exp10itSpider(scrapy.Spider):
name = "exp10it"
def start_requests(self):
urls = [
'http://192.168.8.240:8000/xxxx'
]
for url in urls:
#yield SplashRequest(url, self.parse, args={'wait': 0.5, 'dont_redirect': True},meta={'handle_httpstatus_all': True})
#yield scrapy.Request(url, self.parse, meta={'handle_httpstatus_all': True})
yield scrapy.Request(url, self.parse, meta={'handle_httpstatus_all': True,'splash': {
'args': {
'html': 1,
'png': 1,
}
}
}
)
def parse(self, response):
input("start .........")
print("status code is:\n")
input(response.status)
My start url http://192.168.8.240:8000/xxxx is a 404 status code url,there are threee kinds of request way upon:
the first is:
yield SplashRequest(url, self.parse, args={'wait': 0.5, 'dont_redirect': True},meta={'handle_httpstatus_all': True})
the second is:
yield scrapy.Request(url, self.parse, meta={'handle_httpstatus_all': True})
the third is:
yield scrapy.Request(url, self.parse, meta={'handle_httpstatus_all': True,'splash': {
'args': {
'html': 1,
'png': 1,
}
}
}
)
Only the second request way yield scrapy.Request(url, self.parse, meta={'handle_httpstatus_all': True}) can get the right status code 404,the first and the third both get status code 200,that's to say,after I try to use scrapy-splash,I can not get the right status code 404,can you help me?

Answer 1

As the documentation to scrapy-splash suggests, you have to pass magic_response=True to SplashRequest to achieve this:
meta['splash']['http_status_from_error_code'] - set response.status to HTTP error code when assert(splash:go(..)) fails; it requires meta['splash']['magic_response']=True. http_status_from_error_code option is False by default if you use raw meta API; SplashRequest sets it to True by default.
EDIT:
I was able to get it to work only with execute endpoint, though. Here is sample spider that tests HTTP status code using httpbin.org:
# -*- coding: utf-8 -*-
import scrapy
import scrapy_splash
class HttpStatusSpider(scrapy.Spider):
name = 'httpstatus'
lua_script = """
function main(splash, args)
assert(splash:go(args.url))
assert(splash:wait(0.5))
return {
html = splash:html(),
png = splash:png(),
}
end
"""
def start_requests(self):
yield scrapy_splash.SplashRequest(
'https://httpbin.org/status/402', self.parse,
endpoint='execute',
magic_response=True,
meta={'handle_httpstatus_all': True},
args={'lua_source': self.lua_script})
def parse(self, response):
pass
It passes the HTTP 402 status code to Scrapy, as can be seen from the output:
...
2017-10-23 08:41:31 [scrapy.core.engine] DEBUG: Crawled (402) <GET https://httpbin.org/status/402 via http://localhost:8050/execute> (referer: None)
...
You can experiment with other HTTP status codes as well.