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cant convert String to *net.TCPlistener type

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-1

i want to put string in net.Listener but i got error :

./server.go:26:23: cannot use mainServer (type interface ) as type string in argument to net.Listen: need type assertion
./server.go:27:28: cannot use gpServer (type interface ) as type string in argument to net.Listen: need type assertion

its my code :

 viper.SetConfigFile("config.json")
 viper.AddConfigPath(".")
 viper.SetConfigName("config")
 viper.ReadInConfig()
 fmt.Printf("Using config: %sn", viper.ConfigFileUsed())
 mainServer := viper.Get("mainServer.port")
 gpServer := viper.Get("gpServer.port")

 fmt.Println(mainServer,gpServer)



 fmt.Println("started main server")
 ln, _ := net.Listen("tcp", mainServer)
 gp_conn, _ := net.Listen("tcp", gpServer)

its my config.json :

 "mainServer": 
 "host": "",
 "port": ":2323",
 "enabled": true
 ,
 "gpServer": 
 "host": "",
 "port": ":3232",
 "enabled": true
 
}

can some one explain me how i can convert string to net.TCPListener Type ?
tnx

go

share|improve this question

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It says right in the error: need type assertion. Also check the docs, because the package you're using probably has a convenience method to do this for you.
  
  – JimB
  Mar 22 at 19:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  godoc.org/github.com/spf13/viper#GetString
  
  – Mad Wombat
  Mar 22 at 19:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tnx "mad Wombat" ... My problem has been resolved ..
  
  – MahdiNajafi
  Mar 22 at 20:05
  

  
  
  
  

add a comment | 

-1

i want to put string in net.Listener but i got error :

./server.go:26:23: cannot use mainServer (type interface ) as type string in argument to net.Listen: need type assertion
./server.go:27:28: cannot use gpServer (type interface ) as type string in argument to net.Listen: need type assertion

its my code :

 viper.SetConfigFile("config.json")
 viper.AddConfigPath(".")
 viper.SetConfigName("config")
 viper.ReadInConfig()
 fmt.Printf("Using config: %sn", viper.ConfigFileUsed())
 mainServer := viper.Get("mainServer.port")
 gpServer := viper.Get("gpServer.port")

 fmt.Println(mainServer,gpServer)



 fmt.Println("started main server")
 ln, _ := net.Listen("tcp", mainServer)
 gp_conn, _ := net.Listen("tcp", gpServer)

its my config.json :

 "mainServer": 
 "host": "",
 "port": ":2323",
 "enabled": true
 ,
 "gpServer": 
 "host": "",
 "port": ":3232",
 "enabled": true
 
}

can some one explain me how i can convert string to net.TCPListener Type ?
tnx

go

share|improve this question

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It says right in the error: need type assertion. Also check the docs, because the package you're using probably has a convenience method to do this for you.
  
  – JimB
  Mar 22 at 19:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  godoc.org/github.com/spf13/viper#GetString
  
  – Mad Wombat
  Mar 22 at 19:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tnx "mad Wombat" ... My problem has been resolved ..
  
  – MahdiNajafi
  Mar 22 at 20:05
  

  
  
  
  

add a comment | 

i want to put string in net.Listener but i got error :

./server.go:26:23: cannot use mainServer (type interface ) as type string in argument to net.Listen: need type assertion
./server.go:27:28: cannot use gpServer (type interface ) as type string in argument to net.Listen: need type assertion

its my code :

 viper.SetConfigFile("config.json")
 viper.AddConfigPath(".")
 viper.SetConfigName("config")
 viper.ReadInConfig()
 fmt.Printf("Using config: %sn", viper.ConfigFileUsed())
 mainServer := viper.Get("mainServer.port")
 gpServer := viper.Get("gpServer.port")

 fmt.Println(mainServer,gpServer)



 fmt.Println("started main server")
 ln, _ := net.Listen("tcp", mainServer)
 gp_conn, _ := net.Listen("tcp", gpServer)

its my config.json :

 "mainServer": 
 "host": "",
 "port": ":2323",
 "enabled": true
 ,
 "gpServer": 
 "host": "",
 "port": ":3232",
 "enabled": true
 
}

can some one explain me how i can convert string to net.TCPListener Type ?
tnx

go

share|improve this question

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

./server.go:26:23: cannot use mainServer (type interface ) as type string in argument to net.Listen: need type assertion
./server.go:27:28: cannot use gpServer (type interface ) as type string in argument to net.Listen: need type assertion

 viper.SetConfigFile("config.json")
 viper.AddConfigPath(".")
 viper.SetConfigName("config")
 viper.ReadInConfig()
 fmt.Printf("Using config: %sn", viper.ConfigFileUsed())
 mainServer := viper.Get("mainServer.port")
 gpServer := viper.Get("gpServer.port")

 fmt.Println(mainServer,gpServer)



 fmt.Println("started main server")
 ln, _ := net.Listen("tcp", mainServer)
 gp_conn, _ := net.Listen("tcp", gpServer)

 "mainServer": 
 "host": "",
 "port": ":2323",
 "enabled": true
 ,
 "gpServer": 
 "host": "",
 "port": ":3232",
 "enabled": true
 
}

share|improve this question

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

share|improve this question

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

asked Mar 22 at 19:13

MahdiNajafiMahdiNajafi

11

1 Answer
1

active

oldest

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0

I believe the method viper.GetString would work better than viper.Get based on the documentation:
fyi, you can take a look at these things here: https://godoc.org/github.com/spf13/viper

mainServer := viper.GetString("mainServer.port")
gpServer := viper.GetString("gpServer.port")

However, you could assert the type directly...
Bear in mind this is ill-advised, you shouldn't do this as it will result in a panic if the type is not a string AND viper has the convenience method used above.

ln, _ := net.Listen("tcp", mainServer.(string))
gp_conn, _ := net.Listen("tcp", gpServer.(string))

share|improve this answer

answered Mar 22 at 19:59

snassrsnassr

44058

add a comment | 

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0

I believe the method viper.GetString would work better than viper.Get based on the documentation:
fyi, you can take a look at these things here: https://godoc.org/github.com/spf13/viper

mainServer := viper.GetString("mainServer.port")
gpServer := viper.GetString("gpServer.port")

However, you could assert the type directly...
Bear in mind this is ill-advised, you shouldn't do this as it will result in a panic if the type is not a string AND viper has the convenience method used above.

ln, _ := net.Listen("tcp", mainServer.(string))
gp_conn, _ := net.Listen("tcp", gpServer.(string))

share|improve this answer

answered Mar 22 at 19:59

snassrsnassr

44058

add a comment | 

0

I believe the method viper.GetString would work better than viper.Get based on the documentation:
fyi, you can take a look at these things here: https://godoc.org/github.com/spf13/viper

mainServer := viper.GetString("mainServer.port")
gpServer := viper.GetString("gpServer.port")

However, you could assert the type directly...
Bear in mind this is ill-advised, you shouldn't do this as it will result in a panic if the type is not a string AND viper has the convenience method used above.

ln, _ := net.Listen("tcp", mainServer.(string))
gp_conn, _ := net.Listen("tcp", gpServer.(string))

share|improve this answer

answered Mar 22 at 19:59

snassrsnassr

44058

add a comment | 

I believe the method viper.GetString would work better than viper.Get based on the documentation:
fyi, you can take a look at these things here: https://godoc.org/github.com/spf13/viper

mainServer := viper.GetString("mainServer.port")
gpServer := viper.GetString("gpServer.port")

However, you could assert the type directly...
Bear in mind this is ill-advised, you shouldn't do this as it will result in a panic if the type is not a string AND viper has the convenience method used above.

ln, _ := net.Listen("tcp", mainServer.(string))
gp_conn, _ := net.Listen("tcp", gpServer.(string))

share|improve this answer

answered Mar 22 at 19:59

snassrsnassr

44058

mainServer := viper.GetString("mainServer.port")
gpServer := viper.GetString("gpServer.port")

ln, _ := net.Listen("tcp", mainServer.(string))
gp_conn, _ := net.Listen("tcp", gpServer.(string))

share|improve this answer

answered Mar 22 at 19:59

snassrsnassr

44058

answered Mar 22 at 19:59

snassrsnassr

44058

answered Mar 22 at 19:59

snassrsnassr

44058