scrapy plash set input value? - scrapy

Question

I've succesfully been able to load javascript generated html with scrapy-splash. Now I want to set a couple input value's which are not part of a form. As soon as I put in a value the content on the site changes. I haven't found a way to set the input value's and rescrap the adjusted html. Is this possible?
class ExampleSpider(scrapy.Spider):
name = "example"
allowed_domains = ["example.com"]
start_urls = (
'https://example.com',
)
def start_requests(self):
for url in self.start_urls:
yield scrapy.Request(url, self.parse, meta={
'splash': {
'endpoint': 'render.html',
'args': {'wait': 3}
}
})
def parse(self, response):
page = response.url.split("/")[-2]
filename = 'screener-%s.html' % page
with open(filename, 'wb') as f:
f.write(response.body)
self.log('Saved file %s' % filename)

Answer 1

You need to put the input inside a lua_script as someone suggested in the comments, following an example to click a button:
script ="""
function main(splash)
local url = splash.args.url
assert(splash:go(url))
assert(splash:runjs('document.getElementsByClassName("nameofbutton").click()'))
assert(splash:wait(0.75))
-- return result as a JSON object
return {
html = splash:html()
}
end
"""
then execute the script like this:
def start_requests(self):
for url in self.start_urls:
yield scrapy.Request(url, self.parse_item, meta={
'splash': {
'args': {'lua_source': self.script},
'endpoint': 'execute',
}
})