scshitole
April 12, 2018, 3:13am
1
Folks,
package main
import (
"fmt"
"os"
"strings"
"bufio"
)
func main() {
// Create a single reader which can be called multiple times
reader := bufio.NewReader(os.Stdin)
// Prompt and read
fmt.Print("Enter BIG-IP Management IP: ")
bigip_mgmt, _ := reader.ReadString('\n')
fmt.Print("Enter username for BIG-IP: ")
user, _ := reader.ReadString('\n')
fmt.Print("Enter password for BIG-IP: ")
pass, _ := reader.ReadString('\n')
fmt.Print("Enter IPFIX Pool for BIG-IP: ")
Ipfix_pool, _ := reader.ReadString('\n')
// Trim whitespace and print
fmt.Printf("Bigip Management is: \"%s\", Bigip username : \"%s\", Bigip pass : \"%s\", Bigip IPFIX Pool \"%s\"\n",
strings.TrimSpace(bigip_mgmt), strings.TrimSpace(user), strings.TrimSpace(pass), strings.TrimSpace(ipfix_pool))
fmt.Printf(bigip_mgmt)
create := createipfx()
fmt.Println(create)
}
func createipfx() string {
type Payload struct {
Name string `json:"name"`
Monitor string `json:"monitor"`
Members []struct {
Name string `json:"name"`
Address string `json:"address"`
} `json:"members"`
}
data := Payload{
// fill struct
Name: "FirstIPFIXPool",
Monitor: "gateway_icmp ",
Members: Members[]{
{
Name: Ipfix_pool:4739,
Address: Ipfix_pool,
},
},
}
fmt.Println(data)
payloadBytes, err := json.Marshal(data)
if err != nil {
// handle err
}
body := bytes.NewReader(payloadBytes)
req, err := http.NewRequest("POST", os.ExpandEnv("https://bigip_mgmt/mgmt/tm/ltm/pool"), body)
if err != nil {
// handle err
}
req.SetBasicAuth(user, pass)
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
// handle err
}
defer resp.Body.Close()
return "Created ipfix pool"
}
when I run it gives me error saying syntax error, maybe my Go struct values are not correct
o run ipfix_deploy.go
command-line-arguments
./ipfix_deploy.go:43:21: syntax error: unexpected ], expecting expression
calmh
April 12, 2018, 6:17am
2
Please use the code formatting function of the forum or, better, post your example to play.golang.org .
1 Like
acim
April 12, 2018, 11:19am
3
You should use double quotes, but this is probably just one of the errors.
NobbZ
April 12, 2018, 11:50am
4
No, '\n' is fine. ReadString takes a byte as its argument, which a rune can be coerced into, but a string can’t, so single quotes here.
I’d guess its related to the Members: Members[]{...} on line 42.
Members is not a defined struct.
Members (the struct field) takes an []struct{…}
After I have fixed this with:
Members: []struct {
Name string `json:"name"`
Address string `json:"address"`
}{
{
Name: "Ipfix_pool:4739",
Address: "Ipfix_pool",
},
},
I do get another error because of ipfix_pool not beeing defined on line 24. Fixing it by simple renaming ipfix_pool to Ipfix_pool then causes the next errors:
prog.go:53:22: undefined: json
prog.go:57:9: undefined: bytes
prog.go:59:13: undefined: http
prog.go:63:18: undefined: user
prog.go:63:24: undefined: pass
prog.go:66:14: undefined: http
Which I can mostly fix by adding to the import statement:
import (
...
"encoding/json"
"bytes"
"net/http"
)
Still those 2 remain:
prog.go:66:18: undefined: user
prog.go:66:24: undefined: pass
I will not dig into this. I leave those to the OP.
PS: A link to the playground with my current results: https://play.golang.org/p/zSNoyD_DsGa
acim
April 12, 2018, 11:57am
5
NobbZ:
No, ‘\n’ is fine. ReadString takes a byte as its argument, which a rune can be coerced into, but a string can’t, so single quotes here.
I copy pasted this to playground and it reported error, but I see now that normal single quotes are actually replaced with some other kind here in the post (’ and ')
NobbZ
April 12, 2018, 11:58am
6
Yeah, thats why I actually read the error messages when I paste into playground. Also did this quite a few times already, such that I’m used to replacing mangled quotes.
scshitole
April 12, 2018, 3:52pm
7
Thank you @NobbZ I made changes and now there is this one error prog.go:46:12: missing type in composite literal
package main
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"net/http"
"os"
"strings"
)
func main() {
// Create a single reader which can be called multiple times
reader := bufio.NewReader(os.Stdin)
// Prompt and read
fmt.Print("Enter BIG-IP Management IP: ")
bigip_mgmt, _ := reader.ReadString('\n')
fmt.Print("Enter username for BIG-IP: ")
user, _ := reader.ReadString('\n')
fmt.Print("Enter password for BIG-IP: ")
pass, _ := reader.ReadString('\n')
fmt.Print("Enter IPFIX Pool for BIG-IP: ")
Ipfix_pool, _ := reader.ReadString('\n')
// Trim whitespace and print
fmt.Printf("Bigip Management is: \"%s\", Bigip username : \"%s\", Bigip pass : \"%s\", Bigip IPFIX Pool \"%s\"\n",
strings.TrimSpace(bigip_mgmt), strings.TrimSpace(user), strings.TrimSpace(pass), strings.TrimSpace(Ipfix_pool))
fmt.Printf(bigip_mgmt)
create := createipfx()
fmt.Println(create)
}
func createipfx() string {
type Payload struct {
Name string `json:"name"`
Monitor string `json:"monitor"`
Members []struct {
Name string `json:"name"`
Address string `json:"address"`
} `json:"members"`
}
data := Payload{
// fill struct
Name: "FirstIPFIXPool",
Monitor: "gateway_icmp ",
Members: {
{
Name: "Ipfix_pool:4739",
Address: "Ipfix_pool",
},
},
}
fmt.Println(data)
payloadBytes, err := json.Marshal(data)
if err != nil {
// handle err
}
body := bytes.NewReader(payloadBytes)
req, err := http.NewRequest("POST", os.ExpandEnv("https://bigip_mgmt/mgmt/tm/ltm/pool"), body)
if err != nil {
// handle err
}
req.SetBasicAuth("user", "pass")
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
// handle err
}
defer resp.Body.Close()
return "Created ipfix pool"
}
NobbZ
April 12, 2018, 3:58pm
8
Can you please do us a favour and format your code correctly by enclosing it in triple-backticks, markdown style fenced codeblock?
It will make the code much easier to read and especially to copy, since quotes will remain proper quotes then.
I refuse to fix those again…
scshitole
April 12, 2018, 4:09pm
9
@NobbZ done, I think its giving missing type in composite literal error at
Members: {
{
Name: "Ipfix_pool:4739",
Address: "Ipfix_pool",
},
},
NobbZ
April 12, 2018, 4:18pm
10
Please take a close look into how I fixed this. You need to copy the anonymous structure declaration from the surrounding strict.
Members: []struct {
Name string `json:"name"`
Address string `json:"address"`
}{
{
Name: "Ipfix_pool:4739",
Address: "Ipfix_pool",
},
},
scshitole
April 12, 2018, 4:33pm
11
@NobbZ Worked !! thank you very much
NobbZ
April 12, 2018, 4:40pm
12
In my opinion it’s easier to extract a proper type for that field instead of inclining an anonymous struct.
1 Like
scshitole
April 12, 2018, 4:54pm
13
@NobbZ thanks however I am getting panic runtime error now after I entered all the values
SJC-ML-SHITOLE:tetration shitole$ go run ipfix_deploy.go
Enter BIG-IP Management IP: 10.192.74.73
Enter username for BIG-IP: admin
Enter password for BIG-IP: admin
Enter IPFIX Pool for BIG-IP: 15.1.1.1
Bigip Management is: "10.192.74.73", Bigip username : "admin", Bigip pass : "admin", Bigip IPFIX Pool "15.1.1.1"
10.192.74.73
value of data {Name:FirstIPFIXPool Monitor:gateway_icmp Members:[{Name:Ipfix_pool:4739 Address:Ipfix_pool}]}panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x11fc67d]
goroutine 1 [running]:
main.createipfx(0x0, 0x0)
/Users/shitole/tetration/ipfix_deploy.go:75 +0x38d
main.main()
/Users/shitole/tetration/ipfix_deploy.go:30 +0x58e
exit status 2
NobbZ
April 12, 2018, 5:18pm
14
Are you still running the same code thats on the playground?
That one that does only have // handle error here comments? Please replace those with proper error handling, create a playground or gist wich contains proper code. But perhaps you’ll already find the problem when you introduce error handling, as my guess is that you haven’t set up the connection right or weren’t able to connect to the host or something like that.
system
July 11, 2018, 5:19pm
15
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.
And didn’t look at the signature at all.