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thirdparty/websocketpp/include/websocketpp/error.hpp

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+/*
+ * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the WebSocket++ Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef WEBSOCKETPP_ERROR_HPP
+#define WEBSOCKETPP_ERROR_HPP
+
+#include <exception>
+#include <string>
+#include <utility>
+
+#include <websocketpp/common/cpp11.hpp>
+#include <websocketpp/common/system_error.hpp>
+
+namespace websocketpp {
+
+/// Combination error code / string type for returning two values
+typedef std::pair<lib::error_code,std::string> err_str_pair;
+
+/// Library level error codes
+namespace error {
+enum value {
+    /// Catch-all library error
+    general = 1,
+
+    /// send attempted when endpoint write queue was full
+    send_queue_full,
+
+    /// Attempted an operation using a payload that was improperly formatted
+    /// ex: invalid UTF8 encoding on a text message.
+    payload_violation,
+
+    /// Attempted to open a secure connection with an insecure endpoint
+    endpoint_not_secure,
+
+    /// Attempted an operation that required an endpoint that is no longer
+    /// available. This is usually because the endpoint went out of scope
+    /// before a connection that it created.
+    endpoint_unavailable,
+
+    /// An invalid uri was supplied
+    invalid_uri,
+
+    /// The endpoint is out of outgoing message buffers
+    no_outgoing_buffers,
+
+    /// The endpoint is out of incoming message buffers
+    no_incoming_buffers,
+
+    /// The connection was in the wrong state for this operation
+    invalid_state,
+
+    /// Unable to parse close code
+    bad_close_code,
+
+    /// Close code is in a reserved range
+    reserved_close_code,
+
+    /// Close code is invalid
+    invalid_close_code,
+
+    /// Invalid UTF-8
+    invalid_utf8,
+
+    /// Invalid subprotocol
+    invalid_subprotocol,
+
+    /// An operation was attempted on a connection that did not exist or was
+    /// already deleted.
+    bad_connection,
+
+    /// Unit testing utility error code
+    test,
+
+    /// Connection creation attempted failed
+    con_creation_failed,
+
+    /// Selected subprotocol was not requested by the client
+    unrequested_subprotocol,
+
+    /// Attempted to use a client specific feature on a server endpoint
+    client_only,
+
+    /// Attempted to use a server specific feature on a client endpoint
+    server_only,
+
+    /// HTTP connection ended
+    http_connection_ended,
+
+    /// WebSocket opening handshake timed out
+    open_handshake_timeout,
+
+    /// WebSocket close handshake timed out
+    close_handshake_timeout,
+
+    /// Invalid port in URI
+    invalid_port,
+
+    /// An async accept operation failed because the underlying transport has been
+    /// requested to not listen for new connections anymore.
+    async_accept_not_listening,
+
+    /// The requested operation was canceled
+    operation_canceled,
+
+    /// Connection rejected
+    rejected,
+
+    /// Upgrade Required. This happens if an HTTP request is made to a
+    /// WebSocket++ server that doesn't implement an http handler
+    upgrade_required,
+
+    /// Invalid WebSocket protocol version
+    invalid_version,
+
+    /// Unsupported WebSocket protocol version
+    unsupported_version,
+
+    /// HTTP parse error
+    http_parse_error,
+    
+    /// Extension negotiation failed
+    extension_neg_failed
+}; // enum value
+
+
+class category : public lib::error_category {
+public:
+    category() {}
+
+    char const * name() const _WEBSOCKETPP_NOEXCEPT_TOKEN_ {
+        return "websocketpp";
+    }
+
+    std::string message(int value) const {
+        switch(value) {
+            case error::general:
+                return "Generic error";
+            case error::send_queue_full:
+                return "send queue full";
+            case error::payload_violation:
+                return "payload violation";
+            case error::endpoint_not_secure:
+                return "endpoint not secure";
+            case error::endpoint_unavailable:
+                return "endpoint not available";
+            case error::invalid_uri:
+                return "invalid uri";
+            case error::no_outgoing_buffers:
+                return "no outgoing message buffers";
+            case error::no_incoming_buffers:
+                return "no incoming message buffers";
+            case error::invalid_state:
+                return "invalid state";
+            case error::bad_close_code:
+                return "Unable to extract close code";
+            case error::invalid_close_code:
+                return "Extracted close code is in an invalid range";
+            case error::reserved_close_code:
+                return "Extracted close code is in a reserved range";
+            case error::invalid_utf8:
+                return "Invalid UTF-8";
+            case error::invalid_subprotocol:
+                return "Invalid subprotocol";
+            case error::bad_connection:
+                return "Bad Connection";
+            case error::test:
+                return "Test Error";
+            case error::con_creation_failed:
+                return "Connection creation attempt failed";
+            case error::unrequested_subprotocol:
+                return "Selected subprotocol was not requested by the client";
+            case error::client_only:
+                return "Feature not available on server endpoints";
+            case error::server_only:
+                return "Feature not available on client endpoints";
+            case error::http_connection_ended:
+                return "HTTP connection ended";
+            case error::open_handshake_timeout:
+                return "The opening handshake timed out";
+            case error::close_handshake_timeout:
+                return "The closing handshake timed out";
+            case error::invalid_port:
+                return "Invalid URI port";
+            case error::async_accept_not_listening:
+                return "Async Accept not listening";
+            case error::operation_canceled:
+                return "Operation canceled";
+            case error::rejected:
+                return "Connection rejected";
+            case error::upgrade_required:
+                return "Upgrade required";
+            case error::invalid_version:
+                return "Invalid version";
+            case error::unsupported_version:
+                return "Unsupported version";
+            case error::http_parse_error:
+                return "HTTP parse error";
+            case error::extension_neg_failed:
+                return "Extension negotiation failed";
+            default:
+                return "Unknown";
+        }
+    }
+};
+
+inline const lib::error_category& get_category() {
+    static category instance;
+    return instance;
+}
+
+inline lib::error_code make_error_code(error::value e) {
+    return lib::error_code(static_cast<int>(e), get_category());
+}
+
+} // namespace error
+} // namespace websocketpp
+
+_WEBSOCKETPP_ERROR_CODE_ENUM_NS_START_
+template<> struct is_error_code_enum<websocketpp::error::value>
+{
+    static bool const value = true;
+};
+_WEBSOCKETPP_ERROR_CODE_ENUM_NS_END_
+
+namespace websocketpp {
+
+class exception : public std::exception {
+public:
+    exception(std::string const & msg, lib::error_code ec = make_error_code(error::general))
+      : m_msg(msg.empty() ? ec.message() : msg), m_code(ec)
+    {}
+
+    explicit exception(lib::error_code ec)
+      : m_msg(ec.message()), m_code(ec)
+    {}
+
+    ~exception() throw() {}
+
+    virtual char const * what() const throw() {
+        return m_msg.c_str();
+    }
+
+    lib::error_code code() const throw() {
+        return m_code;
+    }
+
+    const std::string m_msg;
+    lib::error_code m_code;
+};
+
+} // namespace websocketpp
+
+#endif // WEBSOCKETPP_ERROR_HPP