What exactly are you asking? Is SparkWeb capable to show one to one chat history? No. Plugins to read chat history from the server? Depends on what you mean. If you mean for a client, then i don't know which clients support that. But Monitoring Service plugin for Openfire supports message archiving, i think, which lets clients store history on the server and retrieve it. A client should have support for this http://xmpp.org/extensions/xep-0136.html
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