1CURLOPT_UPLOAD_BUFFERSIZE(3)curl_easy_setopt optionsCURLOPT_UPLOAD_BUFFERSIZE(3)
2
3
4
6 CURLOPT_UPLOAD_BUFFERSIZE - set preferred upload buffer size
7
9 #include <curl/curl.h>
10
11 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPLOAD_BUFFERSIZE, long
12 size);
13
15 Pass a long specifying your preferred size (in bytes) for the upload
16 buffer in libcurl. It makes libcurl uses a larger buffer that gets
17 passed to the next layer in the stack to get sent off. In some setups
18 and for some protocols, there's a huge performance benefit of having a
19 larger upload buffer.
20
21 This is just treated as a request, not an order. You cannot be guaranā
22 teed to actually get the given size.
23
24 The upload buffer size is by default 64 kilobytes. The maximum buffer
25 size allowed to be set is 2 megabytes. The minimum buffer size allowed
26 to be set is 16 kilobytes.
27
28 Since curl 7.61.1 the upload buffer is allocated on-demand - so if the
29 handle isn't used for upload, this buffer will not be allocated at all.
30
32 64 kB
33
35 All
36
38 CURL *curl = curl_easy_init();
39 if(curl) {
40 curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/foo.bin");
41
42 /* ask libcurl to allocate a larger upload buffer */
43 curl_easy_setopt(curl, CURLOPT_UPLOAD_BUFFERSIZE, 120000L);
44
45 ret = curl_easy_perform(curl);
46
47 curl_easy_cleanup(curl);
48 }
49
51 Added in 7.62.0.
52
54 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
55 if not.
56
58 CURLOPT_BUFFERSIZE(3), CURLOPT_READFUNCTION(3),
59
60
61
62libcurl 7.76.1 November 04, 2020 CURLOPT_UPLOAD_BUFFERSIZE(3)