UPnP database plugin

[mk: renamed source files, applied coding style, reduced bloat, using
MPD's threading library, using MPD's error reporting and logging
library and refactoring, fixed lots of bugs]

1 files changed, 140 insertions, 0 deletions

diff --git a/src/db/upnp/Device.cxx b/src/db/upnp/Device.cxx
new file mode 100644
index 000000000..c1cfab07a
--- /dev/null
+++ b/src/db/upnp/Device.cxx
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.
+ */
+
+#include "config.h"
+#include "Device.hxx"
+#include "Util.hxx"
+#include "Expat.hxx"
+#include "Log.hxx"
+#include "util/Error.hxx"
+
+#include <stdlib.h>
+
+#include <string.h>
+
+/**
+ * An XML parser which constructs an UPnP device object from the
+ * device descriptor.
+ */
+class UPnPDeviceParser final : public CommonExpatParser {
+	UPnPDevice &m_device;
+	std::string m_tabs;
+	std::vector<std::string> m_path;
+	UPnPService m_tservice;
+
+public:
+	UPnPDeviceParser(UPnPDevice& device)
+		:m_device(device) {}
+
+protected:
+	virtual void StartElement(const XML_Char *name, const XML_Char **) {
+		m_tabs.push_back('\t');
+		m_path.push_back(name);
+	}
+
+	virtual void EndElement(const XML_Char *name) {
+		if (!strcmp(name, "service")) {
+			m_device.services.push_back(m_tservice);
+			m_tservice.clear();
+		}
+		if (m_tabs.size())
+			m_tabs.erase(m_tabs.size()-1);
+		m_path.pop_back();
+	}
+
+	virtual void CharacterData(const XML_Char *s, int len) {
+		if (len == 0)
+			return;
+
+		std::string str(s, len);
+		trimstring(str);
+		switch (m_path.back()[0]) {
+		case 'c':
+			if (!m_path.back().compare("controlURL"))
+				m_tservice.controlURL += str;
+			break;
+		case 'd':
+			if (!m_path.back().compare("deviceType"))
+				m_device.deviceType += str;
+			break;
+		case 'e':
+			if (!m_path.back().compare("eventSubURL"))
+				m_tservice.eventSubURL += str;
+			break;
+		case 'f':
+			if (!m_path.back().compare("friendlyName"))
+				m_device.friendlyName += str;
+			break;
+		case 'm':
+			if (!m_path.back().compare("manufacturer"))
+				m_device.manufacturer += str;
+			else if (!m_path.back().compare("modelName"))
+				m_device.modelName += str;
+			break;
+		case 's':
+			if (!m_path.back().compare("serviceType"))
+				m_tservice.serviceType = str;
+			else if (!m_path.back().compare("serviceId"))
+				m_tservice.serviceId += str;
+		case 'S':
+			if (!m_path.back().compare("SCPDURL"))
+				m_tservice.SCPDURL = str;
+			break;
+		case 'U':
+			if (!m_path.back().compare("UDN"))
+				m_device.UDN = str;
+			else if (!m_path.back().compare("URLBase"))
+				m_device.URLBase += str;
+			break;
+		}
+	}
+};
+
+UPnPDevice::UPnPDevice(const std::string &url, const std::string &description)
+	:ok(false)
+{
+	UPnPDeviceParser mparser(*this);
+	Error error;
+	if (!mparser.Parse(description.data(), description.length(), true,
+			   error)) {
+		// TODO: pass Error to caller
+		LogError(error);
+		return;
+	}
+
+	if (URLBase.empty()) {
+		// The standard says that if the URLBase value is empty, we should use
+		// the url the description was retrieved from. However this is
+		// sometimes something like http://host/desc.xml, sometimes something
+		// like http://host/
+
+		if (url.size() < 8) {
+			// ???
+			URLBase = url;
+		} else {
+			auto hostslash = url.find_first_of("/", 7);
+			if (hostslash == std::string::npos || hostslash == url.size()-1) {
+				URLBase = url;
+			} else {
+				URLBase = path_getfather(url);
+			}
+		}
+	}
+	ok = true;
+}