CURLOPT_EXPECT_100_TIMEOUT_MS explained
Name
CURLOPT_EXPECT_100_TIMEOUT_MS - timeout for Expect: 100-continue response
Synopsis
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_EXPECT_100_TIMEOUT_MS, long milliseconds);
Description
Pass a long to tell libcurl the number of milliseconds to wait for a server response with the HTTP status 100 (Continue), 417 (Expectation Failed) or similar after sending an HTTP request containing an Expect: 100-continue header. If this times out before a response is received, the request body is sent anyway.
Default
1000 milliseconds
Protocols
This functionality affects http only
Example
int main(void) { CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* wait 3 seconds for 100-continue */ curl_easy_setopt(curl, CURLOPT_EXPECT_100_TIMEOUT_MS, 3000L); curl_easy_perform(curl); } }
Availability
Added in curl 7.36.0
Return value
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
See also
CURLOPT_HTTPPOST(3), CURLOPT_POST(3)
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