Angular.js：正在爬Ajax网站

I have read many articles of how to crawl ajax site.i have read in a document that to make ajax site crawlable we have to provide html snapshot of the page.I am using Ruby On Rails as a server side language.

I want to know how the google server translate below url. is it option1 or option2.

Option1

http://example.com/#!/program/Chronicle
http://example.com/?_escape_fragment_=/program/Chronicle

option2

http://example.com/#!/program/Chronicle
http://example.com?_escape_fragment_=program/Chronicle

Also is there any need to provide sitemap for the site.

The answer is Option 1, as everything after the #! is provided.

This post http://www.ng-newsletter.com/posts/serious-angular-seo.html is a good read and likely covers any other questions you might have with regards to angular and crawlers.