1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
package sip2
import (
"fmt"
"github.com/reiver/go-telnet"
"log"
"time"
)
const loginRequestTemplate string = "9300CN%s|CO%s|CP%s|"
const statusRequestTemplate string = "23000%s %sAO%s|AA%s|AD%s|"
type Client struct {
Host string
Port string
location string
conn *telnet.Conn
parser *Parser
}
func NewClient(host, port, location string) Client {
c := Client{host, port, location, nil, nil}
c.parser = getParser()
return c
}
func (c *Client) Connect() (bool, error) {
conn, err := telnet.DialTo(c.Host + ":" + c.Port)
if nil != err {
log.Println("error", err)
return false, err
}
c.conn = conn
return true, nil
}
func (c *Client) Login(user, pass string) bool {
loginStr := fmt.Sprintf(loginRequestTemplate, user, pass, c.location)
if nil == c.conn {
fmt.Println("error! null connection")
}
telnetSend(c.conn, loginStr)
loginResp := telnetRead(c.conn)
msg := c.parseResponse(loginResp)
if value, ok := c.parser.getFixedFieldValue(msg, Ok); ok && value == TRUE {
return true
}
return false
}
func (c *Client) CheckCredentials(user, passwd string) bool {
currentTime := time.Now()
statusRequest := fmt.Sprintf(
statusRequestTemplate,
currentTime.Format("20060102"),
currentTime.Format("150102"),
c.location, user, passwd)
telnetSend(c.conn, statusRequest)
statusMsg := c.parseResponse(telnetRead(c.conn))
if value, ok := c.parser.getFieldValue(statusMsg, ValidPatron); ok && value == YES {
if value, ok := c.parser.getFieldValue(statusMsg, ValidPatronPassword); ok && value == YES {
return true
}
}
// TODO log whatever error we can find (AF, Screen Message, for instance)
return false
}
func (c *Client) parseResponse(txt string) *Message {
msg := c.parser.parseMessage(txt)
return msg
}
|
