http2: provide an error callback and failf the message
Getting nghttp2's error message helps users understand what's going
on. For example when the connection is brought down due a forbidden
header is used - as that header is then not displayed by curl itself.
Example:
curl: (92) Invalid HTTP header field was received: frame type: 1,
stream: 1, name: [upgrade], value: [h2,h2c]
Ref: #12172
Closes #12179
diff --git a/lib/http2.c b/lib/http2.c
index d4fcb26..a989280 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -1607,10 +1607,10 @@
size_t len,
void *userp)
{
+ struct Curl_cfilter *cf = userp;
+ struct Curl_easy *data = CF_DATA_CURRENT(cf);
(void)session;
- (void)msg;
- (void)len;
- (void)userp;
+ failf(data, "%.*s", (int)len, msg);
return 0;
}
#endif
