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curl/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE_LARGE.3

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+.\" **************************************************************************
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+.\" *                             / __| | | | |_) | |
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+.\" * Copyright (C) 1998 - 2020, Daniel Stenberg, <[email protected]>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
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+.\" **************************************************************************
+.\"
+.TH CURLOPT_POSTFIELDSIZE_LARGE 3 "November 04, 2020" "libcurl 7.75.0" "curl_easy_setopt options"
+
+.SH NAME
+CURLOPT_POSTFIELDSIZE_LARGE \- size of POST data pointed to
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDSIZE_LARGE,
+                          curl_off_t size);
+.SH DESCRIPTION
+If you want to post data to the server without having libcurl do a strlen() to
+measure the data size, this option must be used. When this option is used you
+can post fully binary data, which otherwise is likely to fail. If this size is
+set to -1, the library will use strlen() to get the size.
+.SH DEFAULT
+-1
+.SH PROTOCOLS
+HTTP(S)
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  const char *data = large_chunk;
+  curl_off_t length_of_data; /* set somehow */
+
+  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+  /* size of the POST data */
+  curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, length_of_data);
+
+  curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
+
+  curl_easy_perform(curl);
+}
+.fi
+.SH AVAILABILITY
+Along with HTTP
+.SH RETURN VALUE
+Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_POSTFIELDS "(3), " CURLOPT_COPYPOSTFIELDS "(3), "
+.BR CURLOPT_POSTFIELDSIZE "(3), "