in EMASCurl/EMASCurlProtocol.m [881:888]
static int progress_callback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) {
EMASCurlProtocol *protocol = (__bridge EMASCurlProtocol *)clientp;
// 检查是否取消传输
if (protocol.shouldCancel) {
return 1;
}
return 0;
}