Jackline 介绍
Jackline 使用 OCaml 开发的 XMPP 客户端。

支持的特性:
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single XMPP account
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OTR (built-in and enabled by default)
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strict TLS certificate verification
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plain text (no HTML!)
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XEP-0184 (Message Delivery Receipts)
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no import of OTR keys or configuration
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no plaintext connections to XMPP server
Jackline 官网
https://github.com/hannesm/jackline