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I came across this question today. Does it only mean except for POST, other http methods can do multiple times?

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"Idempotence is the property of certain operations in mathematics and computer science, that they can be applied multiple times without changing the result beyond the initial application." en.wikipedia.org/wiki/Idempotence –  user647772 Jul 23 '12 at 12:18
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up vote 1 down vote accepted

Idempotence is defined in Section 9.1.2 of RFC 2616. Also, the statement is incorrect. There are many other non-idempotent HTTP methods, see http://greenbytes.de/tech/webdav/draft-ietf-httpbis-method-registrations-09.html#rfc.section.A.

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