Hi Luis,

You can use spider_idle signal. Check this example: 
https://github.com/darkrho/scrapy-redis/blob/master/scrapy_redis/spiders.py

понедельник, 19 мая 2014 г., 22:12:34 UTC+6 пользователь Luis Miguel 
Morillas написал:
>
> Maybe it should be better to use some Scrapy components (Selectors, Item 
> Loaders, Item pipeline ...) and to write another Twisted app or to use 
> celery with these components.
>
>
> -- lm
>
>
> El lunes, 12 de mayo de 2014 10:29:46 UTC+2, Luis Miguel Morillas escribió:
>>
>> Hi,
>>
>> I don't want excactly an spider, but a system that crawls on demand 
>> single pages when users ask for them by a REST service. I was thinking on a 
>> queue (Celery?)  where scrapy will read urls and will write json results 
>> when parsed. Now I've got a system built on xpath + re expressions and some 
>> ocr but I was thinking on a better scalability.  Do you have some 
>> experience on this issue?
>>
>> Best regards,
>>
>> - luismiguel
>>
>

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