mirror of
https://github.com/moparisthebest/curl
synced 2024-12-23 08:38:49 -05:00
70 lines
3.0 KiB
Groff
70 lines
3.0 KiB
Groff
|
.\" **************************************************************************
|
||
|
|
.\" * _ _ ____ _
|
||
|
|
.\" * Project ___| | | | _ \| |
|
||
|
|
.\" * / __| | | | |_) | |
|
||
|
|
.\" * | (__| |_| | _ <| |___
|
||
|
|
.\" * \___|\___/|_| \_\_____|
|
||
|
|
.\" *
|
||
|
|
.\" * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
.\" *
|
||
|
|
.\" * This software is licensed as described in the file COPYING, which
|
||
|
|
.\" * you should have received as part of this distribution. The terms
|
||
|
|
.\" * are also available at http://curl.haxx.se/docs/copyright.html.
|
||
|
|
.\" *
|
||
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
||
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
||
|
|
.\" *
|
||
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
|
.\" * KIND, either express or implied.
|
||
|
|
.\" *
|
||
|
|
.\" **************************************************************************
|
||
|
|
.\"
|
||
|
|
.TH curl_easy_recv 3 "29 April 2008" "libcurl 7.18.2" "libcurl Manual"
|
||
|
|
.SH NAME
|
||
|
|
curl_easy_recv - receives raw data on an "easy" connection
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.B #include <curl/easy.h>
|
||
|
|
.sp
|
||
|
|
.BI "CURLcode curl_easy_recv( CURL *" curl ", void *" buffer ","
|
||
|
|
.BI "size_t " buflen ", size_t *" n ");"
|
||
|
|
.ad
|
||
|
|
.SH DESCRIPTION
|
||
|
|
This function receives raw data from the established connection. You may use
|
||
|
|
it together with \fIcurl_easy_send(3)\fP to implement custom protocols using
|
||
|
|
libcurl. This functionality can be particularly useful if you use proxies
|
||
|
|
and/or SSL encryption: libcurl will take care of proxy negotiation and
|
||
|
|
connection set-up.
|
||
|
|
|
||
|
|
\fBbuffer\fP is a pointer to your buffer that will get the received
|
||
|
|
data. \fBbuflen\fP is the maximum amount of data you can get in that
|
||
|
|
buffer. The variable \fBn\fP points to will receive the number of received
|
||
|
|
bytes.
|
||
|
|
|
||
|
|
To establish the connection, set \fBCURLOPT_CONNECT_ONLY\fP option before
|
||
|
|
calling \fIcurl_easy_perform(3)\fP. Note that \fIcurl_easy_recv(3)\fP does not
|
||
|
|
work on connections that were created without this option.
|
||
|
|
|
||
|
|
You must ensure that the socket has data to read before calling
|
||
|
|
\fIcurl_easy_recv(3)\fP, otherwise the call will return \fBCURLE_AGAIN\fP -
|
||
|
|
the socket is used in non-blocking mode internally. Use
|
||
|
|
\fIcurl_easy_getinfo(3)\fP with \fBCURLINFO_LASTSOCKET\fP to obtain the
|
||
|
|
socket; use your operating system facilities like \fIselect(2)\fP to check if
|
||
|
|
it has any data you can read.
|
||
|
|
.SH AVAILABILITY
|
||
|
|
Added in 7.18.2.
|
||
|
|
.SH RETURN VALUE
|
||
|
|
On success, returns \fBCURLE_OK\fP, stores the received data into
|
||
|
|
\fBbuffer\fP, and the number of bytes it actually read into \fB*n\fP.
|
||
|
|
|
||
|
|
On failure, returns the appropriate error code.
|
||
|
|
|
||
|
|
If there is no data to read, the function returns \fBCURLE_AGAIN\fP. Use
|
||
|
|
your operating system facilities to wait until the data is ready, and retry.
|
||
|
|
.SH EXAMPLE
|
||
|
|
See \fBsendrecv.c\fP in \fBdocs/examples\fP directory for usage example.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.BR curl_easy_setopt "(3), " curl_easy_perform "(3), "
|
||
|
|
.BR curl_easy_getinfo "(3), "
|
||
|
|
.BR curl_easy_send "(3) "
|