重要信息:)OAuth中文版
http://163navy.blog.163.com/blog/static/105304086201042762510130/
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Appendix A.3. Requesting User Authorization
The Consumer redirects Jane's browser to the Service Provider User Authorization URL to obtain Jane's approval for accessing her private photos.
The Service Provider asks Jane to sign-in using her username and password and, if successful, asks her if she approves granting printer.example.com access to her private photos. If Jane approves the request, the Service Provider redirects her back to the Consumer's callback URL: