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12 lines
797 B
Markdown
12 lines
797 B
Markdown
# WebSocket
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_Supported since NATS Server version 2.2_
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WebSocket support can be enabled in the server and may be used alongside the traditional TCP socket connections. TLS, compression and Origin Header checking are supported.
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**Important**
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* NATS Supports only WebSocket data frames in Binary, not Text format \([https://tools.ietf.org/html/rfc6455\#section-5.6](https://tools.ietf.org/html/rfc6455#section-5.6)\). The server will always send in Binary and your clients MUST send in Binary too.
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* For writers of client libraries: a WebSocket frame is not guaranteed to contain a full NATS protocol \(actually will generally not\). Any data from a frame must be going through a parser that can handle partial protocols. See the protocol description [here](../../nats-protocol/nats-protocol/).
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