- // In this case we send an if-range query with a range header
- if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
- curl_easy_setopt(curl, CURLOPT_RESUME_FROM, (long)SBuf.st_size);
+ // if we have the file send an if-range query with a range header
+ if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
+ {
+ char Buf[1000];
+ sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",
+ (long)SBuf.st_size - 1,
+ TimeRFC1123(SBuf.st_mtime).c_str());
+ headers = curl_slist_append(headers, Buf);
+ }
+ else if(Itm->LastModified > 0)
+ {
+ curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
+ curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
+ }