master-server/deps/curl/docs/cmdline-opts/haproxy-protocol.md

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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: haproxy-protocol
Help: Send HAProxy PROXY protocol v1 header
Protocols: HTTP
Added: 7.60.0
Category: http proxy
Multi: boolean
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See-also:
- proxy
Example:
- --haproxy-protocol $URL
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---
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# `--haproxy-protocol`
Send a HAProxy PROXY protocol v1 header at the beginning of the connection.
This is used by some load balancers and reverse proxies to indicate the
client's true IP address and port.
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This option is primarily useful when sending test requests to a service that
expects this header.