factor out removing chunk headers from http streams and fix chunked encoding support when adding torrents by url

include/libtorrent/http_parser.hpp

@@ -98,6 +98,13 @@ namespace libtorrent
 		// the start of the body.
 		bool chunked_encoding() const { return m_chunked_encoding; }
 
+		// removes the chunk headers from the supplied buffer. The buffer
+		// must be the stream received from the http server this parser
+		// instanced parsed. It will use the internal chunk list to determine
+		// where the chunks are in the buffer. It returns the new length of
+		// the buffer
+		int collapse_chunk_headers(char* buffer, int size) const;
+
 		// returns false if the buffer doesn't contain a complete
 		// chunk header. In this case, call the function again with
 		// a bigger buffer once more bytes have been received.

src/http_connection.cpp

@@ -621,28 +621,7 @@ void http_connection::callback(error_code e, char const* data, int size)
 	std::vector<char> buf;
 	if (data && m_bottled && m_parser.header_finished())
 	{
-		if (m_parser.chunked_encoding())
-		{
-			// go through all chunks and compact them
-			// since we're bottled, and the buffer is our after all
-			// it's OK to mutate it
-			char* write_ptr = (char*)data;
-			// the offsets in the array are from the start of the
-			// buffer, not start of the body, so subtract the size
-			// of the HTTP header from them
-			int offset = m_parser.body_start();
-			std::vector<std::pair<size_type, size_type> > const& chunks = m_parser.chunks();
-			for (std::vector<std::pair<size_type, size_type> >::const_iterator i = chunks.begin()
-				, end(chunks.end()); i != end; ++i)
-			{
-				TORRENT_ASSERT(i->second - i->first < INT_MAX);
-				int len = int(i->second - i->first);
-				if (i->first - offset + len > size) len = size - int(i->first) + offset;
-				memmove(write_ptr, data + i->first - offset, len);
-				write_ptr += len;
-			}
-			size = write_ptr - data;
-		}
+		size = m_parser.collapse_chunk_headers((char*)data, size);
 
 		std::string const& encoding = m_parser.header("content-encoding");
 		if ((encoding == "gzip" || encoding == "x-gzip") && size > 0 && data)

src/http_parser.cpp

@@ -456,5 +456,31 @@ restart_response:
 		m_partial_chunk_header = 0;
 	}
 	
+	int http_parser::collapse_chunk_headers(char* buffer, int size) const
+	{
+		if (!chunked_encoding()) return size;
+
+		// go through all chunks and compact them
+		// since we're bottled, and the buffer is our after all
+		// it's OK to mutate it
+		char* write_ptr = (char*)buffer;
+		// the offsets in the array are from the start of the
+		// buffer, not start of the body, so subtract the size
+		// of the HTTP header from them
+		int offset = body_start();
+		std::vector<std::pair<size_type, size_type> > const& c = chunks();
+		for (std::vector<std::pair<size_type, size_type> >::const_iterator i = c.begin()
+			, end(c.end()); i != end; ++i)
+		{
+			TORRENT_ASSERT(i->second - i->first < INT_MAX);
+			TORRENT_ASSERT(i->second - offset <= size);
+			int len = int(i->second - i->first);
+			if (i->first - offset + len > size) len = size - int(i->first) + offset;
+			memmove(write_ptr, buffer + i->first - offset, len);
+			write_ptr += len;
+		}
+		size = write_ptr - buffer;
+		return size;
+	}
 }
 

src/torrent.cpp

@@ -582,7 +582,7 @@ namespace libtorrent
 			prioritize_udp_trackers();
 	}
 
-#if 1
+#if 0
 	
 	// NON BOTTLED VERSION. SUPPORTS PROGRESS REPORTING
 
@@ -619,6 +619,11 @@ namespace libtorrent
 
 		if (!ec) return;
 
+		// if this was received with chunked encoding, we need to strip out
+		// the chunk headers
+		size = parser.collapse_chunk_headers((char*)&m_torrent_file_buf[0], m_torrent_file_buf.size());
+		m_torrent_file_buf.resize(size);
+
 		std::string const& encoding = parser.header("content-encoding");
 		if ((encoding == "gzip" || encoding == "x-gzip") && m_torrent_file_buf.size())
 		{
@@ -764,7 +769,13 @@ namespace libtorrent
 #if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
 		int num_torrents = m_ses.m_torrents.size();
 #endif
-		m_ses.m_torrents.erase(m_torrent_file->info_hash());
+
+		// we're about to erase the session's reference to this
+		// torrent, create another reference
+		boost::shared_ptr<torrent> me(shared_from_this());
+
+		m_ses.remove_torrent_impl(me, 0);
+
 		m_torrent_file = tf;
 		m_ses.m_torrents.insert(std::make_pair(m_torrent_file->info_hash(), shared_from_this()));
 
@@ -857,7 +868,7 @@ namespace libtorrent
 		boost::shared_ptr<http_connection> conn(
 			new http_connection(m_ses.m_io_service, m_ses.m_half_open
 				, boost::bind(&torrent::on_torrent_download, shared_from_this()
-					, _1, _2, _3, _4), false));
+					, _1, _2, _3, _4)));
 		conn->get(m_url, seconds(30), 0, 0, 5, m_ses.m_settings.user_agent);
 		set_state(torrent_status::downloading_metadata);
 	}