add udp_skin suport udp log

example/example.cpp

@@ -20,6 +20,7 @@ void user_defined_example();
 void err_handler_example();
 void syslog_example();
 void custom_flags_example();
+void udp_example();
 
 #include "spdlog/spdlog.h"
 #include "spdlog/cfg/env.h" // for loading levels from the environment variable
@@ -74,7 +75,7 @@ int main(int, char *[])
         trace_example();
         stopwatch_example();
         custom_flags_example();
-
+        udp_example();
         // Flush all *registered* loggers using a worker thread every 3 seconds.
         // note: registered loggers *must* be thread safe for this to work correctly!
         spdlog::flush_every(std::chrono::seconds(3));
@@ -197,6 +198,7 @@ void trace_example()
 // stopwatch example
 #include "spdlog/stopwatch.h"
 #include <thread>
+#include <spdlog/sinks/udp_sink.h>
 void stopwatch_example()
 {
     spdlog::stopwatch sw;
@@ -292,3 +294,14 @@ void custom_flags_example()
     formatter->add_flag<my_formatter_flag>('*').set_pattern("[%n] [%*] [%^%l%$] %v");
     spdlog::set_formatter(std::move(formatter));
 }
+
+void udp_example()
+{
+    // using spdlog::details::make_unique;
+    //auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+    spdlog::sinks::udp_sink_config cfg("127.0.0.1", 11091);
+    auto my_logger = spdlog::udp_logger_mt("udplog", cfg);
+    my_logger->set_level(spdlog::level::debug);
+    my_logger->info("hello world");
+    my_logger->info("are you ok");
+}

include/spdlog/details/udp_client.h

@@ -0,0 +1,89 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifdef _WIN32
+#error include tcp_client-windows.h instead
+#endif
+
+// tcp client helper
+#include <spdlog/common.h>
+#include <spdlog/details/os.h>
+
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <netinet/tcp.h>
+
+#include <string>
+
+namespace spdlog {
+namespace details {
+class udp_client
+{
+    int socket_ = -1;
+    std::string m_svrIp;
+    int m_svrPort;
+    struct sockaddr_in sockAddr_;
+public:
+
+    bool init(const std::string &host, int port)
+    {
+        m_svrIp = host;
+        m_svrPort = port;
+
+        socket_ = socket(PF_INET, SOCK_DGRAM, 0);
+        if (socket_ < 0)
+        {
+            throw_spdlog_ex("error: Create Socket Failed!");
+            return false;
+        }
+
+        sockAddr_.sin_family = AF_INET;
+        sockAddr_.sin_port = htons(m_svrPort);
+        inet_aton(m_svrIp.c_str(), &sockAddr_.sin_addr);
+
+        memset(sockAddr_.sin_zero, 0x00, 8);
+        return true;
+    }
+
+    bool is_init() const
+    {
+        return socket_ != -1;
+    }
+
+    void close()
+    {
+        if (is_init())
+        {
+            ::close(socket_);
+            socket_ = -1;
+        }
+    }
+
+    int fd() const
+    {
+        return socket_;
+    }
+
+    ~udp_client()
+    {
+        close();
+    }
+
+    // Send exactly n_bytes of the given data.
+    // On error close the connection and throw.
+    void send(const char *data, size_t n_bytes)
+    {
+        size_t toslen = 0;
+        size_t tolen = sizeof(struct sockaddr);
+        if (( toslen = sendto(socket_, data, n_bytes, 0, (struct sockaddr *)&sockAddr_, tolen)) == -1)
+        {
+            throw_spdlog_ex("write(2) failed", errno);
+        }
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/sinks/udp_sink.h

@@ -0,0 +1,87 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/common.h>
+#include <spdlog/sinks/base_sink.h>
+#include <spdlog/details/null_mutex.h>
+#ifdef _WIN32
+#include <spdlog/details/tcp_client-windows.h>
+#else
+#include <spdlog/details/udp_client.h>
+#endif
+
+#include <mutex>
+#include <string>
+#include <chrono>
+#include <functional>
+
+#pragma once
+
+// Simple tcp client sink
+// Connects to remote address and send the formatted log.
+// Will attempt to reconnect if connection drops.
+// If more complicated behaviour is needed (i.e get responses), you can inherit it and override the sink_it_ method.
+
+namespace spdlog {
+namespace sinks {
+
+struct udp_sink_config
+{
+    std::string server_host;
+    int server_port;
+
+    udp_sink_config(std::string host, int port)
+        : server_host{std::move(host)}
+        , server_port{port}
+    {}
+};
+
+template<typename Mutex>
+class udp_sink : public spdlog::sinks::base_sink<Mutex>
+{
+public:
+    // connect to tcp host/port or throw if failed
+    // host can be hostname or ip address
+
+    explicit udp_sink(udp_sink_config sink_config)
+        : config_{std::move(sink_config)}
+    {
+
+    }
+
+    ~udp_sink() override = default;
+
+protected:
+    void sink_it_(const spdlog::details::log_msg &msg) override
+    {
+        spdlog::memory_buf_t formatted;
+        spdlog::sinks::base_sink<Mutex>::formatter_->format(msg, formatted);
+        if (!client_.is_init())
+        {
+            client_.init(config_.server_host, config_.server_port);
+        }
+        client_.send(formatted.data(), formatted.size());
+    }
+
+    void flush_() override {}
+    udp_sink_config config_;
+    details::udp_client client_;
+};
+
+using udp_sink_mt = udp_sink<std::mutex>;
+using udp_sink_st = udp_sink<spdlog::details::null_mutex>;
+
+} // namespace sinks
+
+//
+// factory functions
+//
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> udp_logger_mt(const std::string &logger_name, sinks::udp_sink_config skin_config)
+{
+    return Factory::template create<sinks::udp_sink_mt>(logger_name, skin_config);
+}
+
+} // namespace spdlog

src/spdlog.cpp

@@ -17,6 +17,7 @@
 #include <spdlog/sinks/sink-inl.h>
 #include <spdlog/sinks/base_sink-inl.h>
 #include <spdlog/details/null_mutex.h>
+#include <spdlog/sinks/udp_sink.h>
 
 #include <mutex>