diff options
author | Loïc Hoguin <[email protected]> | 2018-10-10 11:54:50 +0200 |
---|---|---|
committer | Loïc Hoguin <[email protected]> | 2018-10-10 11:55:50 +0200 |
commit | 4b9970bcd725972dbd845e07c34a8ef8409ec04c (patch) | |
tree | a7d05ae457ed8a99c2c7c615430696203ac15bc6 /src/ranch_tcp.erl | |
parent | 1cc7de15b6f04835faa2f6505669cb7f90c29796 (diff) | |
download | ranch-4b9970bcd725972dbd845e07c34a8ef8409ec04c.tar.gz ranch-4b9970bcd725972dbd845e07c34a8ef8409ec04c.tar.bz2 ranch-4b9970bcd725972dbd845e07c34a8ef8409ec04c.zip |
Add ranch_tcp:recv_proxy_header/2
This uses the undocumented function gen_tcp:unrecv/2.
Tests have been added for both gen_tcp and ssl connections,
including sending data in the same first packet, at least
for gen_tcp (ssl tests may or may not end up buffering some
of the TLS handshake before the recv call, but there's no
guarantees).
Diffstat (limited to 'src/ranch_tcp.erl')
-rw-r--r-- | src/ranch_tcp.erl | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/ranch_tcp.erl b/src/ranch_tcp.erl index d5517a5..ba77308 100644 --- a/src/ranch_tcp.erl +++ b/src/ranch_tcp.erl @@ -26,6 +26,7 @@ -export([connect/3]). -export([connect/4]). -export([recv/3]). +-export([recv_proxy_header/2]). -export([send/2]). -export([sendfile/2]). -export([sendfile/4]). @@ -131,6 +132,28 @@ connect(Host, Port, Opts, Timeout) when is_integer(Port) -> recv(Socket, Length, Timeout) -> gen_tcp:recv(Socket, Length, Timeout). +-spec recv_proxy_header(inet:socket(), timeout()) + -> {ok, any()} | {error, closed | atom()} | {error, protocol_error, atom()}. +recv_proxy_header(Socket, Timeout) -> + case recv(Socket, 0, Timeout) of + {ok, Data} -> + case ranch_proxy_header:parse(Data) of + {ok, ProxyInfo, <<>>} -> + {ok, ProxyInfo}; + {ok, ProxyInfo, Rest} -> + case gen_tcp:unrecv(Socket, Rest) of + ok -> + {ok, ProxyInfo}; + Error -> + Error + end; + {error, HumanReadable} -> + {error, protocol_error, HumanReadable} + end; + Error -> + Error + end. + -spec send(inet:socket(), iodata()) -> ok | {error, atom()}. send(Socket, Packet) -> gen_tcp:send(Socket, Packet). |