流星照亮加拿大的天空 - 未名空间MITBBS历史存档

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流星照亮加拿大的天空

流星照亮加拿大的天空# Aviation - 航空航天

a*u2008-11-22 08:11

1 楼

【以下文字转载自 DotNet 讨论区】
发信人: apieceofyou (apieceofme), 信区: DotNet
标题: Help!
发信站: BBS 未名空间站 (Fri Dec 30 19:08:00 2011, 美东)
I have 2 web pages, pageA and pageB.
There is a hyperlink in pageA to redirect user to pageB.
User must go to PageA and click on the link to pageB. If user visit pageB
directly, then a popup will display to warn user and redirect user back to
pageA.
My question is how to know if user open page by hyperlink or not?
The hints is to use session state and JavaScript.
But I still could not figure it out :( ...
Can someone help?
Thanks!!

Z*R2008-11-22 08:11

2 楼

不知道具体地点。。。
http://news.bbc.co.uk/2/hi/americas/7744207.stm
Footage of a large meteor streaking across western Canada has been broadcast
on Canadian television.
The video filmed from a local police car on patrol, showed a small light
turning into a massive and blindingly bright fireball as it fell from the
sky and appeared to hit the Earth in the distance.
Scientists are now searching for its remains.

g*g2008-11-22 08:11

3 楼

Easy, generate a token on server side before displaying in pageA,
have the token as a parameter, if user goes through pageA->pageB,
the token is sent to server again, server compares the token in
user session against this one, if it matches, displays pageB, otherwise
deny access.

【在 a*********u 的大作中提到】

: 【以下文字转载自 DotNet 讨论区】
: 发信人: apieceofyou (apieceofme), 信区: DotNet
: 标题: Help!
: 发信站: BBS 未名空间站 (Fri Dec 30 19:08:00 2011, 美东)
: I have 2 web pages, pageA and pageB.
: There is a hyperlink in pageA to redirect user to pageB.
: User must go to PageA and click on the link to pageB. If user visit pageB
: directly, then a popup will display to warn user and redirect user back to
: pageA.
: My question is how to know if user open page by hyperlink or not?