Add stubs for file/blob/end handling.

src/libguac/client-handlers.c

@@ -51,6 +51,9 @@ __guac_instruction_handler_mapping __guac_instruction_handler_map[] = {
    {"clipboard",  __guac_handle_clipboard},
    {"disconnect", __guac_handle_disconnect},
    {"size",       __guac_handle_size},
+   {"file",       __guac_handle_file},
+   {"blob",       __guac_handle_blob},
+   {"end",        __guac_handle_end},
    {NULL,         NULL}
 };
 
@@ -126,6 +129,24 @@ int __guac_handle_size(guac_client* client, guac_instruction* instruction) {
     return 0;
 }
 
+int __guac_handle_file(guac_client* client, guac_instruction* instruction) {
+    /* STUB */
+    guac_client_log_info(client, "STUB: file");
+    return 0;
+}
+
+int __guac_handle_blob(guac_client* client, guac_instruction* instruction) {
+    /* STUB */
+    guac_client_log_info(client, "STUB: blob");
+    return 0;
+}
+
+int __guac_handle_end(guac_client* client, guac_instruction* instruction) {
+    /* STUB */
+    guac_client_log_info(client, "STUB: end");
+    return 0;
+}
+
 int __guac_handle_disconnect(guac_client* client, guac_instruction* instruction) {
     /* Return error code to force disconnect */
     return -1;

src/libguac/client-handlers.h

@@ -99,6 +99,27 @@ int __guac_handle_key(guac_client* client, guac_instruction* instruction);
  */
 int __guac_handle_clipboard(guac_client* client, guac_instruction* instruction);
 
+/**
+ * Internal initial handler for the file instruction. When a file instruction
+ * is received, this handler will be called. The client's file handler will
+ * be invoked if defined.
+ */
+int __guac_handle_file(guac_client* client, guac_instruction* instruction);
+
+/**
+ * Internal initial handler for the blob instruction. When a blob instruction
+ * is received, this handler will be called. The client's blob handler will
+ * be invoked if defined.
+ */
+int __guac_handle_blob(guac_client* client, guac_instruction* instruction);
+
+/**
+ * Internal initial handler for the end instruction. When a end instruction
+ * is received, this handler will be called. The client's end handler will
+ * be invoked if defined.
+ */
+int __guac_handle_end(guac_client* client, guac_instruction* instruction);
+
 /**
  * Internal initial handler for the size instruction. When a size instruction
  * is received, this handler will be called. The client's size handler will