2010-01-22 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>

	aria2 now returns gzip compressed XML-RPC response if XML-RPC
	client accepts gzip content encoding.
	* src/A2STR.cc
	* src/A2STR.h
	* src/GZipEncoder.cc
	* src/GZipEncoder.h
	* src/HttpHeader.cc
	* src/HttpHeader.h
	* src/HttpServer.cc
	* src/HttpServer.h
	* src/HttpServerBodyCommand.cc
	* src/HttpServerCommand.cc
	* src/Makefile.am
	* src/XmlRpcResponse.cc
	* src/XmlRpcResponse.h
	* test/GZipEncoderTest.cc
	* test/Makefile.am

1 files changed, 145 insertions, 0 deletions

diff --git a/src/GZipEncoder.cc b/src/GZipEncoder.cc
new file mode 100644
index 00000000..0f605b66
--- /dev/null
+++ b/src/GZipEncoder.cc
@@ -0,0 +1,145 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2010 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 --> */
+#include "GZipEncoder.h"
+
+#include <cstring>
+
+#include "StringFormat.h"
+#include "DlAbortEx.h"
+#include "util.h"
+
+namespace aria2 {
+
+namespace {
+const int OUTBUF_LENGTH = 4096;
+}
+
+GZipEncoder::GZipEncoder():_strm(0), _finished(false) {}
+
+GZipEncoder::~GZipEncoder()
+{
+  release();
+}
+
+void GZipEncoder::init()
+{
+  _finished = false;
+  release();
+  _strm = new z_stream();
+  _strm->zalloc = Z_NULL;
+  _strm->zfree = Z_NULL;
+  _strm->opaque = Z_NULL;
+  _strm->avail_in = 0;
+  _strm->next_in = Z_NULL;
+
+  if(Z_OK != deflateInit2(_strm, 9, Z_DEFLATED, 31, 9, Z_DEFAULT_STRATEGY)) {
+    throw DL_ABORT_EX("Initializing z_stream failed.");
+  }
+}
+
+void GZipEncoder::release()
+{
+  if(_strm) {
+    deflateEnd(_strm);
+    delete _strm;
+    _strm = 0;
+  }
+}
+
+std::string GZipEncoder::encode
+(const unsigned char* in, size_t length, int flush)
+{
+  std::string out;
+
+  _strm->avail_in = length;
+  _strm->next_in = const_cast<unsigned char*>(in);
+
+  unsigned char outbuf[OUTBUF_LENGTH];
+  while(1) {
+    _strm->avail_out = OUTBUF_LENGTH;
+    _strm->next_out = outbuf;
+
+    int ret = ::deflate(_strm, flush);
+
+    if(ret == Z_STREAM_END) {
+      _finished = true;
+    } else if(ret != Z_OK) {
+      throw DL_ABORT_EX(StringFormat("libz::deflate() failed. cause:%s",
+                                     _strm->msg).str());
+    }
+
+    size_t produced = OUTBUF_LENGTH-_strm->avail_out;
+
+    out.append(&outbuf[0], &outbuf[produced]);
+
+    if(_strm->avail_out > 0) {
+      break;
+    }
+  }
+  return out;
+}
+
+bool GZipEncoder::finished()
+{
+  return _finished;
+}
+
+std::string GZipEncoder::str()
+{
+  _internalBuf += encode(0, 0, Z_FINISH);
+  return _internalBuf;
+}
+
+GZipEncoder& GZipEncoder::operator<<(const char* s)
+{
+  _internalBuf += encode(reinterpret_cast<const unsigned char*>(s), strlen(s));
+  return *this;
+}
+
+GZipEncoder& GZipEncoder::operator<<(const std::string& s)
+{
+  _internalBuf += encode
+    (reinterpret_cast<const unsigned char*>(s.data()), s.size());
+  return *this;
+}
+
+GZipEncoder& GZipEncoder::operator<<(int64_t i)
+{
+  std::string s = util::itos(i);
+  (*this) << s;
+  return *this;
+}
+
+} // namespace aria2