Download PDF's From ScienceDirect.com Automatically

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Hi Dears
I want to Create a program in c# to download All new papers on www.ScienceDirect.com.
I want to know How can I recognize addition of new papers and its link.
Please help me.

Posted 5-Aug-14 5:16am

alireza ghasemi

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-08-05T08:08:00

In general case, you cannot recognize anything. The new HTML page is not different from old one; it does not provide any distinction between "new" and "old" items, unless it is specially designed this way, which you cannot expect. The HTML header can contain date information, but it is also not guaranteed.

Therefore, you have to scan the same HTML documents on regular basis and compare the set of links with the set you should preserve in your database, only then you can spot the change. Even then you cannot guarantee that you spotted, for example, updates in the article. Such detail can be based on conventions used on the site, but those conventions also can change.

—SA