Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/libcurl/curl_easy_send.3 @ 22:d77477b4e151

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Let _int_rc() also handle (i.e. ignore) a local version suffix
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 12:05:57 +0200
parents b50eed0cc0ef
children
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1 .\" **************************************************************************
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2 .\" * _ _ ____ _
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3 .\" * Project ___| | | | _ \| |
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4 .\" * / __| | | | |_) | |
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5 .\" * | (__| |_| | _ <| |___
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6 .\" * \___|\___/|_| \_\_____|
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7 .\" *
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8 .\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 .\" *
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10 .\" * This software is licensed as described in the file COPYING, which
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11 .\" * you should have received as part of this distribution. The terms
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12 .\" * are also available at https://curl.haxx.se/docs/copyright.html.
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13 .\" *
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14 .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 .\" * copies of the Software, and permit persons to whom the Software is
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16 .\" * furnished to do so, under the terms of the COPYING file.
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17 .\" *
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18 .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 .\" * KIND, either express or implied.
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20 .\" *
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21 .\" **************************************************************************
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22 .\"
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23 .TH curl_easy_send 3 "29 April 2008" "libcurl 7.18.2" "libcurl Manual"
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24 .SH NAME
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25 curl_easy_send - sends raw data over an "easy" connection
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26 .SH SYNOPSIS
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27 .B #include <curl/easy.h>
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28 .sp
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29 .BI "CURLcode curl_easy_send( CURL *" curl ", const void *" buffer ","
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30 .BI " size_t " buflen ", size_t *" n ");"
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31 .ad
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32 .SH DESCRIPTION
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33 This function sends arbitrary data over the established connection. You may
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34 use it together with \fIcurl_easy_recv(3)\fP to implement custom protocols
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35 using libcurl. This functionality can be particularly useful if you use
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36 proxies and/or SSL encryption: libcurl will take care of proxy negotiation and
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37 connection set-up.
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38
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39 \fBbuffer\fP is a pointer to the data of length \fBbuflen\fP that you want sent.
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40 The variable \fBn\fP points to will receive the number of sent bytes.
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41
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42 To establish the connection, set \fICURLOPT_CONNECT_ONLY(3)\fP option before
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43 calling \fIcurl_easy_perform(3)\fP or \fIcurl_multi_perform(3)\fP. Note that
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44 \fIcurl_easy_send(3)\fP will not work on connections that were created without
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45 this option.
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46
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47 The call will return \fBCURLE_AGAIN\fP if it's not possible to send data right
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48 now - the socket is used in non-blocking mode internally. When
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49 \fBCURLE_AGAIN\fP is returned, use your operating system facilities like
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50 \fIselect(2)\fP to wait until the socket is writable. The socket may be
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51 obtained using \fIcurl_easy_getinfo(3)\fP with \fICURLINFO_ACTIVESOCKET(3)\fP.
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52
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53 Furthermore if you wait on the socket and it tells you it's writable,
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54 \fIcurl_easy_send(3)\fP may return \fBCURLE_AGAIN\fP if the only data that was
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55 sent was for internal SSL processing, and no other data could be sent.
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56
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57 .SH AVAILABILITY
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58 Added in 7.18.2.
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59 .SH RETURN VALUE
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60 On success, returns \fBCURLE_OK\fP and stores the number of bytes actually
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61 sent into \fB*n\fP. Note that this may very well be less than the amount you
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62 wanted to send.
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64 On failure, returns the appropriate error code.
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65
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66 This function may return \fBCURLE_AGAIN\fP. In this case, use your operating
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67 system facilities to wait until the socket is writable, and retry.
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68
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69 If there's no socket available to use from the previous transfer, this function
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70 returns \fBCURLE_UNSUPPORTED_PROTOCOL\fP.
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71 .SH EXAMPLE
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72 See \fBsendrecv.c\fP in \fBdocs/examples\fP directory for usage example.
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73 .SH "SEE ALSO"
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74 .BR curl_easy_setopt "(3), " curl_easy_perform "(3), " curl_easy_getinfo "(3), "
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75 .BR curl_easy_recv "(3) "