--- /dev/null
+.\" **************************************************************************
+.\" * _ _ ____ _
+.\" * Project ___| | | | _ \| |
+.\" * / __| | | | |_) | |
+.\" * | (__| |_| | _ <| |___
+.\" * \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, 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 CURLOPT_HEADERFUNCTION 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_HEADERFUNCTION \- callback that receives header data
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+size_t header_callback(char *buffer,
+ size_t size,
+ size_t nitems,
+ void *userdata);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HEADERFUNCTION, header_callback);
+.SH DESCRIPTION
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+This function gets called by libcurl as soon as it has received header
+data. The header callback will be called once for each header and only
+complete header lines are passed on to the callback. Parsing headers is very
+easy using this. The size of the data pointed to by \fIptr\fP is \fIsize\fP
+multiplied with \fInmemb\fP. Do not assume that the header line is zero
+terminated! The pointer named \fIuserdata\fP is the one you set with the
+\fICURLOPT_HEADERDATA(3)\fP option. This callback function must return the
+number of bytes actually taken care of. If that amount differs from the amount
+passed in to your function, it'll signal an error to the library. This will
+cause the transfer to get aborted and the libcurl function in progress will
+return \fICURL_WRITE_ERROR\fP.
+
+A complete HTTP header that is passed to this function can be up to
+\fICURL_MAX_HTTP_HEADER\fP (100K) bytes.
+
+If this option is not set, or if it is set to NULL, but
+\fICURLOPT_HEADERDATA(3)\fP is set to anything but NULL, the function used to
+accept response data will be used instead. That is, it will be the function
+specified with \fICURLOPT_WRITEFUNCTION(3)\fP, or if it is not specified or
+NULL - the default, stream-writing function.
+
+It's important to note that the callback will be invoked for the headers of
+all responses received after initiating a request and not just the final
+response. This includes all responses which occur during authentication
+negotiation. If you need to operate on only the headers from the final
+response, you will need to collect headers in the callback yourself and use
+HTTP status lines, for example, to delimit response boundaries.
+
+When a server sends a chunked encoded transfer, it may contain a trailer. That
+trailer is identical to a HTTP header and if such a trailer is received it is
+passed to the application using this callback as well. There are several ways
+to detect it being a trailer and not an ordinary header: 1) it comes after the
+response-body. 2) it comes after the final header line (CR LF) 3) a Trailer:
+header among the regular response-headers mention what header(s) to expect in
+the trailer.
+
+For non-HTTP protocols like FTP, POP3, IMAP and SMTP this function will get
+called with the server responses to the commands that libcurl sends.
+.SH DEFAULT
+Nothing.
+.SH PROTOCOLS
+Used for all protocols with headers or meta-data concept: HTTP, FTP, POP3,
+IMAP, SMTP and more.
+.SH EXAMPLE
+TODO
+.SH AVAILABILITY
+Always
+.SH RETURN VALUE
+Returns CURLE_OK
+.SH "SEE ALSO"
+.BR CURLOPT_HEADERDATA "(3), " CURLOPT_WRITEFUNCTION "(3), "
--- /dev/null
+.\" **************************************************************************
+.\" * _ _ ____ _
+.\" * Project ___| | | | _ \| |
+.\" * / __| | | | |_) | |
+.\" * | (__| |_| | _ <| |___
+.\" * \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, 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 CURLOPT_XFERINFODATA 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_XFERINFODATA \- custom pointer passed to the progress callback
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);
+.SH DESCRIPTION
+Pass a \fIpointer\fP that will be untouched by libcurl and passed as the first
+argument in the progress callback set with \fICURLOPT_XFERINFOFUNCTION(3)\fP.
+
+This is an alias for \fICURLOPT_PROGRESSDATA(3)\fP.
+.SH DEFAULT
+The default value of this parameter is NULL.
+.SH PROTOCOLS
+All
+.SH EXAMPLE
+http://curl.haxx.se/libcurl/c/progressfunc.html
+.SH AVAILABILITY
+Added in 7.32.0
+.SH RETURN VALUE
+Returns CURLE_OK
+.SH "SEE ALSO"
+.BR CURLOPT_XFERINFOFUNCTION "(3), " CURLOPT_XFERINFOFUNCTION "(3), "
--- /dev/null
+.\" **************************************************************************
+.\" * _ _ ____ _
+.\" * Project ___| | | | _ \| |
+.\" * / __| | | | |_) | |
+.\" * | (__| |_| | _ <| |___
+.\" * \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, 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 CURLOPT_XFERINFOFUNCTION 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_XFERINFOFUNCTION \- callback to progress meter function
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+int progress_callback(void *clientp,
+ curl_off_t dltotal,
+ curl_off_t dlnow,
+ curl_off_t ultotal,
+ curl_off_t ulnow);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFOFUNCTION, progress_callback);
+.SH DESCRIPTION
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+This function gets called by libcurl instead of its internal equivalent with a
+frequent interval. While data is being transferred it will be called very
+frequently, and during slow periods like when nothing is being transferred it
+can slow down to about one call per second.
+
+\fIclientp\fP is the pointer set with \fICURLOPT_XFERINFODATA(3)\fP, it is not
+used by libcurl but is only passed along from the application to the callback.
+
+The callback gets told how much data libcurl will transfer and has
+transferred, in number of bytes. \fIdltotal\fP is the total number of bytes
+libcurl expects to download in this transfer. \fIdlnow\fP is the number of
+bytes downloaded so far. \fIultotal\fP is the total number of bytes libcurl
+expects to upload in this transfer. \fIulnow\fP is the number of bytes
+uploaded so far.
+
+Unknown/unused argument values passed to the callback will be set to zero
+(like if you only download data, the upload size will remain 0). Many times
+the callback will be called one or more times first, before it knows the data
+sizes so a program must be made to handle that.
+
+Returning a non-zero value from this callback will cause libcurl to abort the
+transfer and return \fICURLE_ABORTED_BY_CALLBACK\fP.
+
+If you transfer data with the multi interface, this function will not be
+called during periods of idleness unless you call the appropriate libcurl
+function that performs transfers.
+
+\fICURLOPT_NOPROGRESS(3)\fP must be set to 0 to make this function actually
+get called.
+.SH DEFAULT
+By default, libcurl has an internal progress meter. That's rarely wanted by
+users.
+.SH PROTOCOLS
+All
+.SH EXAMPLE
+http://curl.haxx.se/libcurl/c/progressfunc.html
+.SH AVAILABILITY
+Added in 7.32.0. This callback replaces \fICURLOPT_PROGRESSFUNCTION(3)\fP
+.SH RETURN VALUE
+Returns CURLE_OK.
+.SH "SEE ALSO"
+.BR CURLOPT_XFERINFODATA "(3), " CURLOPT_NOPROGRESS "(3), "
projects / platform / upstream / curl.git / commitdiff