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|
package hst
import (
"fmt"
"io"
"net"
"net/http"
"os"
"strings"
"time"
)
const networkTopologyDir string = "topo-network/"
const containerTopologyDir string = "topo-containers/"
type Stanza struct {
content string
pad int
}
type ActionResult struct {
Err error
Desc string
ErrOutput string
StdOutput string
}
type JsonResult struct {
Code int
Desc string
ErrOutput string
StdOutput string
}
func AssertFileSize(f1, f2 string) error {
fi1, err := os.Stat(f1)
if err != nil {
return err
}
fi2, err1 := os.Stat(f2)
if err1 != nil {
return err1
}
if fi1.Size() != fi2.Size() {
return fmt.Errorf("file sizes differ (%d vs %d)", fi1.Size(), fi2.Size())
}
return nil
}
func (c *Stanza) NewStanza(name string) *Stanza {
c.Append("\n" + name + " {")
c.pad += 2
return c
}
func (c *Stanza) Append(name string) *Stanza {
c.content += strings.Repeat(" ", c.pad)
c.content += name + "\n"
return c
}
func (c *Stanza) Close() *Stanza {
c.content += "}\n"
c.pad -= 2
return c
}
func (s *Stanza) ToString() string {
return s.content
}
func (s *Stanza) SaveToFile(fileName string) error {
fo, err := os.Create(fileName)
if err != nil {
return err
}
defer fo.Close()
_, err = io.Copy(fo, strings.NewReader(s.content))
return err
}
// NewHttpClient creates [http.Client] with disabled proxy and redirects, it also sets timeout to 30seconds.
func NewHttpClient() *http.Client {
transport := http.DefaultTransport
transport.(*http.Transport).Proxy = nil
transport.(*http.Transport).DisableKeepAlives = true
client := &http.Client{
Transport: transport,
Timeout: time.Second * 30,
CheckRedirect: func(req *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
}}
return client
}
func TcpSendReceive(address, data string) (string, error) {
conn, err := net.DialTimeout("tcp", address, time.Second*30)
if err != nil {
return "", err
}
defer conn.Close()
err = conn.SetDeadline(time.Now().Add(time.Second * 30))
if err != nil {
return "", err
}
_, err = conn.Write([]byte(data))
if err != nil {
return "", err
}
reply := make([]byte, 1024)
_, err = conn.Read(reply)
if err != nil {
return "", err
}
return string(reply), nil
}
|
