Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Net/src/HTTPBasicCredentials.cpp

@@ -0,0 +1,134 @@
+//
+// HTTPBasicCredentials.cpp
+//
+// Library: Net
+// Package: HTTP
+// Module:  HTTPBasicCredentials
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Net/HTTPBasicCredentials.h"
+#include "Poco/Net/HTTPRequest.h"
+#include "Poco/Net/NetException.h"
+#include "Poco/Base64Encoder.h"
+#include "Poco/Base64Decoder.h"
+#include "Poco/String.h"
+#include <sstream>
+
+
+using Poco::Base64Decoder;
+using Poco::Base64Encoder;
+using Poco::icompare;
+
+
+namespace Poco {
+namespace Net {
+
+
+const std::string HTTPBasicCredentials::SCHEME = "Basic";
+
+
+HTTPBasicCredentials::HTTPBasicCredentials()
+{
+}
+
+
+HTTPBasicCredentials::HTTPBasicCredentials(const std::string& username, const std::string& password):
+	_username(username),
+	_password(password)
+{
+}
+
+
+HTTPBasicCredentials::HTTPBasicCredentials(const HTTPRequest& request)
+{
+	std::string scheme;
+	std::string authInfo;
+	request.getCredentials(scheme, authInfo);
+	if (icompare(scheme, SCHEME) == 0)
+	{
+		parseAuthInfo(authInfo);
+	}
+	else throw NotAuthenticatedException("Basic authentication expected");
+}
+
+
+HTTPBasicCredentials::HTTPBasicCredentials(const std::string& authInfo)
+{
+	parseAuthInfo(authInfo);
+}
+
+
+HTTPBasicCredentials::~HTTPBasicCredentials()
+{
+}
+
+
+void HTTPBasicCredentials::clear()
+{
+	_username.clear();
+	_password.clear();
+}
+
+
+void HTTPBasicCredentials::setUsername(const std::string& username)
+{
+	_username = username;
+}
+
+
+void HTTPBasicCredentials::setPassword(const std::string& password)
+{
+	_password = password;
+}
+
+
+void HTTPBasicCredentials::authenticate(HTTPRequest& request) const
+{
+	std::ostringstream ostr;
+	Base64Encoder encoder(ostr);
+	encoder.rdbuf()->setLineLength(0);
+	encoder << _username << ":" << _password;
+	encoder.close();
+	request.setCredentials(SCHEME, ostr.str());
+}
+
+
+void HTTPBasicCredentials::proxyAuthenticate(HTTPRequest& request) const
+{
+	std::ostringstream ostr;
+	Base64Encoder encoder(ostr);
+	encoder.rdbuf()->setLineLength(0);
+	encoder << _username << ":" << _password;
+	encoder.close();
+	request.setProxyCredentials(SCHEME, ostr.str());
+}
+
+
+void HTTPBasicCredentials::parseAuthInfo(const std::string& authInfo)
+{
+	static const int eof = std::char_traits<char>::eof();
+
+	std::istringstream istr(authInfo);
+	Base64Decoder decoder(istr);
+	int ch = decoder.get();
+	while (ch != eof && ch != ':')
+	{
+		_username += (char) ch;
+		ch = decoder.get();
+	}
+	if (ch == ':') ch = decoder.get();
+	while (ch != eof)
+	{
+		_password += (char) ch;
+		ch = decoder.get();
+	}
+}
+
+
+} } // namespace Poco::Net