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
75
76
77
78
79
80
|
package gemini
import (
"crypto/tls"
"fmt"
"net/url"
"os"
"strconv"
"strings"
)
const GeminiNetwork = "tcp"
const GeminiPort = 1965
const GeminiPrefix = "gemini://"
const requestSuffix = "\r\n"
type GeminiURI struct {
host string
request []byte
}
func Parse(request, host string, port int) (*GeminiURI, error) {
// add gemini:// scheme if missing
if !strings.HasPrefix(request, GeminiPrefix) {
request = GeminiPrefix + request
}
// create GeminiURI if host has been specified
if strings.Contains(host, ":") {
return &GeminiURI{host, []byte(request + requestSuffix)}, nil
} else if host != "" {
return &GeminiURI{host + ":" + strconv.Itoa(port), []byte(request + requestSuffix)}, nil
}
// get host from request
u, err := url.Parse(request)
if err != nil {
return nil, err
}
if strings.Contains(u.Host, ":") {
return &GeminiURI{u.Host, []byte(request + requestSuffix)}, nil
} else {
return &GeminiURI{u.Host + ":" + strconv.Itoa(port), []byte(request + requestSuffix)}, nil
}
}
func (c *GeminiURI) Get(config *tls.Config, out *os.File) error {
conn, err := tls.Dial(GeminiNetwork, c.host, config)
if err != nil {
return err
}
defer conn.Close()
n, err := conn.Write(c.request)
if err != nil {
return err
}
buf := make([]byte, 1024)
for {
n, err = conn.Read(buf)
if err != nil {
return err
}
written, err := out.Write(buf[:n])
if written != n {
return fmt.Errorf("Got %d bytes, but only wrote %d bytes", n, written)
}
if err != nil {
return err
}
if n == 0 {
break
}
}
return nil
}
|
