C++ lazy_entry::dict_find_string方法代码示例

	bool http_tracker_connection::extract_peer_info(lazy_entry const& info, peer_entry& ret)
	{
		// extract peer id (if any)
		if (info.type() != lazy_entry::dict_t)
		{
			fail(error_code(errors::invalid_peer_dict));
			return false;
		}
		lazy_entry const* i = info.dict_find_string("peer id");
		if (i != 0 && i->string_length() == 20)
		{
			std::copy(i->string_ptr(), i->string_ptr()+20, ret.pid.begin());
		}
		else
		{
			// if there's no peer_id, just initialize it to a bunch of zeroes
			std::fill_n(ret.pid.begin(), 20, 0);
		}

		// extract ip
		i = info.dict_find_string("ip");
		if (i == 0)
		{
			fail(error_code(errors::invalid_tracker_response));
			return false;
		}
		ret.ip = i->string_value();

		// extract port
		i = info.dict_find_int("port");
		if (i == 0)
		{
			fail(error_code(errors::invalid_tracker_response));
			return false;
		}
		ret.port = (unsigned short)i->int_value();

		return true;
	}

std::string parse_dht_client(lazy_entry const& e)
{
    lazy_entry const* ver = e.dict_find_string("v");
    if (!ver) return "generic";
    std::string const& client = ver->string_value();
    if (client.size() < 2)
    {
        ++g_unknown_message_input;
        return client;
    }
    else if (std::equal(client.begin(), client.begin() + 2, "Az"))
    {
        ++g_az_message_input;
        return "Azureus";
    }
    else if (std::equal(client.begin(), client.begin() + 2, "UT"))
    {
        ++g_ut_message_input;
        return "uTorrent";
    }
    else if (std::equal(client.begin(), client.begin() + 2, "LT"))
    {
        ++g_lt_message_input;
        return "libtorrent";
    }
    else if (std::equal(client.begin(), client.begin() + 2, "MP"))
    {
        ++g_mp_message_input;
        return "MooPolice";
    }
    else if (std::equal(client.begin(), client.begin() + 2, "GR"))
    {
        ++g_gr_message_input;
        return "GetRight";
    }
    else if (std::equal(client.begin(), client.begin() + 2, "MO"))
    {
        ++g_mo_message_input;
        return "Mono Torrent";
    }
    else
    {
        ++g_unknown_message_input;
        return client;
    }
}

	bool default_storage::verify_resume_data(lazy_entry const& rd, error_code& error)
	{
		lazy_entry const* file_priority = rd.dict_find_list("file_priority");
		if (file_priority && file_priority->list_size()
			== files().num_files())
		{
			m_file_priority.resize(file_priority->list_size());
			for (int i = 0; i < file_priority->list_size(); ++i)
				m_file_priority[i] = boost::uint8_t(file_priority->list_int_value_at(i, 1));
		}


		bool seed = false;
		
        if (lazy_entry const* pieces = rd.dict_find_string("pieces"))
		{
			if (int(pieces->string_length()) == m_files.num_pieces())
			{
				seed = true;
				char const* p = pieces->string_ptr();
				for (int i = 0; i < pieces->string_length(); ++i)
				{
					if ((p[i] & 1) == 1) continue;
					seed = false;
					break;
				}
			}
		}
		else
		{
			error = errors::missing_pieces;
			return false;
		}

        int flags = (settings().ignore_resume_timestamps ? ignore_timestamps : 0);

        return true;

	}

	void http_tracker_connection::parse(int status_code, lazy_entry const& e)
	{
		boost::shared_ptr<request_callback> cb = requester();
		if (!cb) return;

		int interval = int(e.dict_find_int_value("interval", 1800));
		int min_interval = int(e.dict_find_int_value("min interval", 60));

		std::string trackerid;
		lazy_entry const* tracker_id = e.dict_find_string("tracker id");
		if (tracker_id)
			trackerid = tracker_id->string_value();
		// parse the response
		lazy_entry const* failure = e.dict_find_string("failure reason");
		if (failure)
		{
			fail(error_code(errors::tracker_failure), status_code
				, failure->string_value().c_str(), interval, min_interval);
			return;
		}

		lazy_entry const* warning = e.dict_find_string("warning message");
		if (warning)
			cb->tracker_warning(tracker_req(), warning->string_value());

		std::vector<peer_entry> peer_list;

		if (tracker_req().kind == tracker_request::scrape_request)
		{
			std::string ih = tracker_req().info_hash.to_string();

			lazy_entry const* files = e.dict_find_dict("files");
			if (files == 0)
			{
				fail(error_code(errors::invalid_files_entry), -1, ""
					, interval, min_interval);
				return;
			}

			lazy_entry const* scrape_data = files->dict_find_dict(ih.c_str());
			if (scrape_data == 0)
			{
				fail(error_code(errors::invalid_hash_entry), -1, ""
					, interval, min_interval);
				return;
			}
			int complete = int(scrape_data->dict_find_int_value("complete", -1));
			int incomplete = int(scrape_data->dict_find_int_value("incomplete", -1));
			int downloaded = int(scrape_data->dict_find_int_value("downloaded", -1));
			int downloaders = int(scrape_data->dict_find_int_value("downloaders", -1));
			cb->tracker_scrape_response(tracker_req(), complete
				, incomplete, downloaded, downloaders);
			return;
		}

		lazy_entry const* peers_ent = e.dict_find("peers");
		if (peers_ent && peers_ent->type() == lazy_entry::string_t)
		{
			char const* peers = peers_ent->string_ptr();
			int len = peers_ent->string_length();
			for (int i = 0; i < len; i += 6)
			{
				if (len - i < 6) break;

				peer_entry p;
				p.pid.clear();
				error_code ec;
				p.ip = detail::read_v4_address(peers).to_string(ec);
				p.port = detail::read_uint16(peers);
				if (ec) continue;
				peer_list.push_back(p);
			}
		}
		else if (peers_ent && peers_ent->type() == lazy_entry::list_t)
		{
			int len = peers_ent->list_size();
			for (int i = 0; i < len; ++i)
			{
				peer_entry p;
				if (!extract_peer_info(*peers_ent->list_at(i), p)) return;
				peer_list.push_back(p);
			}
		}
		else
		{
			peers_ent = 0;
		}

#if TORRENT_USE_IPV6
		lazy_entry const* ipv6_peers = e.dict_find_string("peers6");
		if (ipv6_peers)
		{
			char const* peers = ipv6_peers->string_ptr();
			int len = ipv6_peers->string_length();
			for (int i = 0; i < len; i += 18)
			{
				if (len - i < 18) break;

				peer_entry p;
				p.pid.clear();
//.........这里部分代码省略.........