我写的Go程序有点奇怪，我认为可能与我正在调用的C库有关。程序运行的时间越长，检索图片的响应时间就越长。我不是什么甚至可以被认为是一个可通过的C程序员，我仍然是新的从Go加载C。我在gphoto2库周围编写了一个简单的REST界面，允许我远程触发相机并检索照片。理想情况下，我会用它来创建一个游戏中时光倒流，所以我需要它来运行很长时间。这是包装器：
o.s.i.codec.kryo.CompositeKryoRegistrar : configured Kryo registration [40, java.io.File] with serializer org.springframework.integration.codec.kryo.FileSerializer
o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'rabbitConnectionFactory' has been autodetected for JMX exposure
o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'integrationMbeanExporter' has been autodetected for JMX exposure
o.s.j.e.a.AnnotationMBeanExporter : Located managed bean 'integrationMbeanExporter': registering with JMX server as MBean [org.springframework.integration.monitor:name=integrationMbeanExporter,type=IntegrationMBeanExporter]
o.s.j.e.a.AnnotationMBeanExporter : Located managed bean 'rabbitConnectionFactory': registering with JMX server as MBean [org.springframework.amqp.rabbit.connection:name=rabbitConnectionFactory,type=CachingConnectionFactory]
o.s.i.monitor.IntegrationMBeanExporter : Registering beans for JMX exposure on startup
o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel nullChannel
o.s.i.monitor.IntegrationMBeanExporter : Located managed bean 'org.springframework.integration:type=MessageChannel,name=nullChannel': registering with JMX server as MBean [org.springframework.integration:type=MessageChannel,name=nullChannel]
o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel output
o.s.i.monitor.IntegrationMBeanExporter : Located managed bean 'org.springframework.integration:type=MessageChannel,name=output': registering with JMX server as MBean [org.springframework.integration:type=MessageChannel,name=output]
o.s.i.monitor.IntegrationMBeanExporter : Registering MessageChannel errorChannel
o.s.i.monitor.IntegrationMBeanExporter : Located managed bean 'org.springframework.integration:type=MessageChannel,name=errorChannel': registering with JMX server as MBean [org.springframework.integration:type=MessageChannel,name=errorChannel]
o.s.i.monitor.IntegrationMBeanExporter : Registering MessageHandler errorLogger
o.s.i.monitor.IntegrationMBeanExporter : Located managed bean 'org.springframework.integration:type=MessageHandler,name=errorLogger,bean=internal': registering with JMX server as MBean [org.springframework.integration:type=MessageHandler,name=errorLogger,bean=internal]
o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase -2147482648
r.t.b.demo.source.GatewayApplication : No active profile set, falling back to default profiles: default
s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@56cfe111: startup date [Mon May 29 15:07:40 JST 2017]; parent: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4fe767f3
o.s.c.support.GenericApplicationContext : Refreshing org.springframework.context.support.GenericApplicationContext@67de7a99: startup date [Mon May 29 15:07:40 JST 2017]; root of context hierarchy
r.t.b.demo.source.GatewayApplication : Started GatewayApplication in 0.189 seconds (JVM running for 10.957)
o.s.amqp.rabbit.core.RabbitAdmin : Failed to declare exchange: Exchange [name=output, type=topic, durable=true, autoDelete=false, internal=false, arguments={}], continuing... org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused
o.s.integration.channel.DirectChannel : Channel 'gateway:8181.output' has 1 subscriber(s).
o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
o.s.i.endpoint.EventDrivenConsumer : Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
o.s.i.channel.PublishSubscribeChannel : Channel 'gateway:8181.errorChannel' has 1 subscriber(s).
o.s.i.endpoint.EventDrivenConsumer : started _org.springframework.integration.errorLogger
o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 2147482647
o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 2147483647
s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8181 (http)
这是来自libgphoto2-dev的C函数，它正在调用：
onclick = "sendForm(event);"}
最后，这是输出。当我第一次启动程序时，只需几秒钟就可以检索到图片，经过几个小时后，它只需要2分钟。
camera := new(gphoto2go.Camera)
err := camera.Init()
if err > 0 {
log.Println(err)
}
r := gin.Default()
r.GET("/ping", func(c *gin.Context) {
c.JSON(200, gin.H{
"message": "pong",
})
})
r.GET("/shot", func(c *gin.Context) {
//camera.Interrupt()
cameraFilePath, err := camera.TriggerCaptureToFile()
if err == 0 {
cameraFileReader := camera.FileReader(cameraFilePath.Folder, cameraFilePath.Name)
defer cameraFileReader.Close()
buf := new(bytes.Buffer)
buf.ReadFrom(cameraFileReader)
//camera.DeleteFile(cameraFilePath.Folder, cameraFilePath.Name)
encodedImage := base64.StdEncoding.EncodeToString(buf.Bytes())
c.JSON(200, gin.H{
"image": encodedImage,
})
buf.Reset()
//c.Data(200, "image/jpeg", buf.Bytes())
} else {
log.Println(gphoto2go.CameraResultToString(err))
c.Error(errors.New(gphoto2go.CameraResultToString(err)))
c.JSON(http.StatusInternalServerError, gphoto2go.CameraResultToString(err))
return
}
})
r.Run()