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-rw-r--r--lib/url.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/url.c b/lib/url.c
index 588391524..3c5240b78 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -1016,12 +1016,18 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option, ...)
* Set data write callback
*/
data->set.fwrite = va_arg(param, curl_write_callback);
+ if(!data->set.fwrite)
+ /* When set to NULL, reset to our internal default function */
+ data->set.fwrite = (curl_write_callback)fwrite;
break;
case CURLOPT_READFUNCTION:
/*
* Read data callback
*/
data->set.fread = va_arg(param, curl_read_callback);
+ if(!data->set.fread)
+ /* When set to NULL, reset to our internal default function */
+ data->set.fread = (curl_read_callback)fread;
break;
case CURLOPT_SSLCERT:
/*