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|
package main
import (
"crypto/tls"
"fmt"
"net/url"
"os"
"strconv"
"strings"
)
const GeminiNetwork = "tcp"
const GeminiPort = 1965
const GeminiPrefix = "gemini://"
func FormatRequest(request string) []byte {
if !strings.HasPrefix(request, GeminiPrefix) {
request = GeminiPrefix + request
}
request = request + "\r\n"
return []byte(request)
}
type GeminiConn struct {
host string
config *tls.Config
}
func NewGeminiConn(request string, port int) (*GeminiConn, error) {
if !strings.HasPrefix(request, "gemini://") {
request = "gemini://" + request
}
u, err := url.Parse(request)
if err != nil {
return nil, err
}
conf := tls.Config{
MinVersion: tls.VersionTLS12,
InsecureSkipVerify: true,
}
if strings.Contains(u.Host, ":") {
return &GeminiConn{u.Host, &conf}, nil
} else {
return &GeminiConn{u.Host + ":" + strconv.Itoa(port), &conf}, nil
}
}
func (c *GeminiConn) Get(request []byte, out *os.File) error {
conn, err := tls.Dial(GeminiNetwork, c.host, c.config)
if err != nil {
return err
}
defer conn.Close()
n, err := conn.Write(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
}
|
