CURLOPT_TIMECONDITION.3 2.5 KB

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  25. .TH CURLOPT_TIMECONDITION 3 "May 17, 2022" "libcurl 7.85.0" "curl_easy_setopt options"
  26. .SH NAME
  27. CURLOPT_TIMECONDITION \- select condition for a time request
  28. .SH SYNOPSIS
  29. .nf
  30. #include <curl/curl.h>
  31. CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond);
  32. .fi
  33. .SH DESCRIPTION
  34. Pass a long as parameter. This defines how the \fICURLOPT_TIMEVALUE(3)\fP time
  35. value is treated. You can set this parameter to \fICURL_TIMECOND_IFMODSINCE\fP
  36. or \fICURL_TIMECOND_IFUNMODSINCE\fP.
  37. The last modification time of a file is not always known and in such instances
  38. this feature will have no effect even if the given time condition would not
  39. have been met. \fIcurl_easy_getinfo(3)\fP with the
  40. \fICURLINFO_CONDITION_UNMET\fP option can be used after a transfer to learn if
  41. a zero-byte successful "transfer" was due to this condition not matching.
  42. .SH DEFAULT
  43. CURL_TIMECOND_NONE (0)
  44. .SH PROTOCOLS
  45. HTTP, FTP, RTSP, and FILE
  46. .SH EXAMPLE
  47. .nf
  48. CURL *curl = curl_easy_init();
  49. if(curl) {
  50. curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
  51. /* January 1, 2020 is 1577833200 */
  52. curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
  53. /* If-Modified-Since the above time stamp */
  54. curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
  55. /* Perform the request */
  56. curl_easy_perform(curl);
  57. }
  58. .fi
  59. .SH AVAILABILITY
  60. Always
  61. .SH RETURN VALUE
  62. Returns CURLE_OK
  63. .SH "SEE ALSO"
  64. .BR CURLOPT_TIMEVALUE "(3), "