Scrapy.http.Request
Automatic de duplication, according to the hash value of the URL, de duplication
attribute
Meta (dict) transfers data between different requests, Dict
Priority (int) the priority of this request (0 by default)
Don? Filter (Boolean) turn off automatic de duplication
Errback (callable) the function that will be called when any exception is thrown while processing the request
Flags (list) flag sent to the request, which can be used for logging or similar purposes
Method
Copy() returns a new request, which is a copy of the request
Replace() returns the request of an update pair
FormRequest
A formrequest class is built in the framework of the scratch, which extends the base class request and has the function of processing HTML forms
When post requests, use formrequest to pass data into the formdata parameter
Log usage
Log file log output file, if none, is printed on the console
Log? Enable log? True by default
Log & encoding date code, default UTF-8
Log level, default debug
Log & format log format
Log “dateformat” log date format
Log_stdout log standard output, default false, if true, all standard output will be written to the log
Log ﹣ short ﹣ names. The default is false. If true, the component name will not be output
Generally only added in settings profile
