e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
87 lines
2.0 KiB
Markdown
87 lines
2.0 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_RANGE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_LOW_SPEED_LIMIT (3)
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- CURLOPT_MAXFILESIZE_LARGE (3)
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- CURLOPT_MAX_RECV_SPEED_LARGE (3)
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- CURLOPT_RESUME_FROM (3)
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Protocol:
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- HTTP
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- FTP
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- FILE
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- RTSP
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- SFTP
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---
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# NAME
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CURLOPT_RANGE - byte range to request
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RANGE, char *range);
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~~~
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# DESCRIPTION
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Pass a char pointer as parameter, which should contain the specified range you
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want to retrieve. It should be in the format "X-Y", where either X or Y may be
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left out and X and Y are byte indexes.
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HTTP transfers also support several intervals, separated with commas as in
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*"X-Y,N-M"*. Using this kind of multiple intervals causes the HTTP server
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to send the response document in pieces (using standard MIME separation
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techniques). Unfortunately, the HTTP standard (RFC 7233 section 3.1) allows
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servers to ignore range requests so even when you set CURLOPT_RANGE(3)
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for a request, you may end up getting the full response sent back.
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For RTSP, the formatting of a range should follow RFC 2326 Section 12.29. For
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RTSP, byte ranges are **not** permitted. Instead, ranges should be given in
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**npt**, **utc**, or **smpte** formats.
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For HTTP PUT uploads this option should not be used, since it may conflict with
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other options.
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Pass a NULL to this option to disable the use of ranges.
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The application does not have to keep the string around after setting this
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option.
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# DEFAULT
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NULL
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* get the first 200 bytes */
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curl_easy_setopt(curl, CURLOPT_RANGE, "0-199");
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/* Perform the request */
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curl_easy_perform(curl);
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}
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}
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~~~
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# AVAILABILITY
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FILE since 7.18.0, RTSP since 7.20.0
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# RETURN VALUE
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Returns CURLE_OK on success or
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CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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