Parse HTTP RPC request on the fly without buffering

1 files changed, 95 insertions, 0 deletions

diff --git a/src/XmlRpcDiskWriter.h b/src/XmlRpcDiskWriter.h
new file mode 100644
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+++ b/src/XmlRpcDiskWriter.h
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+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef D_XML_RPC_DISK_WRITER_H
+#define D_XML_RPC_DISK_WRITER_H
+
+#include "DiskWriter.h"
+#include "RpcRequest.h"
+#include "XmlRpcRequestParserStateMachine.h"
+#include "XmlParser.h"
+
+namespace aria2 {
+
+namespace rpc {
+
+// DiskWriter backed with XML-RPC XmlParser. The written bytes are
+// consumed by XML-RPC XmlParser. It is only capable of sequential
+// write so offset argument in write() will be ignored. It also does
+// not offer read().
+class XmlRpcDiskWriter : public DiskWriter {
+public:
+  XmlRpcDiskWriter();
+
+  virtual ~XmlRpcDiskWriter();
+
+  virtual void initAndOpenFile(off_t totalLength = 0);
+  
+  virtual void openFile(off_t totalLength = 0)
+  {
+    initAndOpenFile(totalLength);
+  }
+
+  virtual void closeFile() {}
+
+  virtual void openExistingFile(off_t totalLength = 0)
+  {
+    initAndOpenFile(totalLength);
+  }
+
+  virtual off_t size()
+  {
+    return 0;
+  }
+
+  virtual void writeData(const unsigned char* data, size_t len, off_t offset);
+
+  virtual ssize_t readData(unsigned char* data, size_t len, off_t offset)
+  {
+    return 0;
+  }
+
+  int finalize();
+  RpcRequest getResult() const;
+  int reset();
+private:
+  XmlRpcRequestParserStateMachine psm_;
+  xml::XmlParser parser_;
+};
+
+} // namespace rpc
+
+} // namespace aria2
+
+#endif // D_XML_RPC_DISK_WRITER_H