I just asked a question about whether it was possible to write a web-page-checking code and run it from free web server, and one supporter answered and said that it was possible and suggested that I used Google App Engine service.
But he also said that there are no files there, so I would have to work with their database.
I wonder, if there is no such feature as creating files on that free web server, then is it possible to run from that free web server a code that would check a web-page every once in a while, record its HTML code, and mail it to my mail box?
It is totally possible on Google AppEngine.
I am not sure by you mean "no files" on GAE: there is definitely access to files but in "READ ONLY" mode.
What you have to do is fetch the remote WEB page (through urlfetch API) and use the email API to send it.
来源：https://stackoverflow.com/questions/1735028/is-it-possible-to-have-a-free-web-service-that-would-check-a-page-and-email-its