URL Disaptching/Async listeners: forward debug messages

This makes it possible for the Asynchronous listener to get the
messages. It can then process them in a more fancy way.

The default implementation will still log the messages to the console
(if debug is enabled), but it will do so from the Async listener for
asynchronous requests now. This means they will probably be logged from
the same thread, and show up in a more readable way.

This also makes it possible to listen to several requests and log them
in a nice way (in a status window or whatever).

headers/os/net/UrlProtocolDispatchingListener.h

@@ -27,7 +27,8 @@ enum {
 	B_URL_PROTOCOL_DOWNLOAD_PROGRESS,
 	B_URL_PROTOCOL_UPLOAD_PROGRESS,
 	B_URL_PROTOCOL_REQUEST_COMPLETED,
-	B_URL_PROTOCOL_CERTIFICATE_VERIFICATION_FAILED
+	B_URL_PROTOCOL_CERTIFICATE_VERIFICATION_FAILED,
+	B_URL_PROTOCOL_DEBUG_MESSAGE
 };
 
 
@@ -53,6 +54,9 @@ public:
 									ssize_t bytesSent, ssize_t bytesTotal);
 	virtual void				RequestCompleted(BUrlRequest* caller,
 									bool success);
+	virtual void				DebugMessage(BUrlRequest* caller,
+									BUrlProtocolDebugMessage type,
+									const char* text);
 	virtual bool				CertificateVerificationFailed(
 									BUrlRequest* caller,
 									BCertificate& certificate,

src/kits/network/libnetapi/UrlProtocolAsynchronousListener.cpp

@@ -12,6 +12,7 @@
 #include <AppKit.h>
 #include <UrlProtocolAsynchronousListener.h>
 #include <Debug.h>
+#include <String.h>
 
 extern const char* kUrlProtocolMessageType;
 extern const char* kUrlProtocolCaller;
@@ -142,6 +143,16 @@ BUrlProtocolAsynchronousListener::MessageReceived(BMessage* message)
 			}
 			break;
 
+		case B_URL_PROTOCOL_DEBUG_MESSAGE:
+			{
+				BUrlProtocolDebugMessage type
+					= (BUrlProtocolDebugMessage)message->FindInt32("url:type");
+				BString text = message->FindString("url:text");
+
+				DebugMessage(caller, type, text);
+			}
+			break;
+
 		case B_URL_PROTOCOL_CERTIFICATE_VERIFICATION_FAILED:
 			{
 				const char* error = message->FindString("url:error");

src/kits/network/libnetapi/UrlProtocolDispatchingListener.cpp

@@ -125,6 +125,18 @@ BUrlProtocolDispatchingListener::RequestCompleted(BUrlRequest* caller,
 }
 
 
+void
+BUrlProtocolDispatchingListener::DebugMessage(BUrlRequest* caller,
+	BUrlProtocolDebugMessage type, const char* text)
+{
+	BMessage message(B_URL_PROTOCOL_NOTIFICATION);
+	message.AddInt32("url:type", type);
+	message.AddString("url:text", text);
+
+	_SendMessage(&message, B_URL_PROTOCOL_DEBUG_MESSAGE, caller);
+}
+
+
 bool
 BUrlProtocolDispatchingListener::CertificateVerificationFailed(
 	BUrlRequest* caller, BCertificate& certificate, const char* error)
@@ -149,7 +161,7 @@ BUrlProtocolDispatchingListener::_SendMessage(BMessage* message,
 	int8 notification, BUrlRequest* caller)
 {
 	ASSERT(message != NULL);
-		
+
 	message->AddPointer(kUrlProtocolCaller, caller);
 	message->AddInt8(kUrlProtocolMessageType, notification);