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package main
import (
"bufio"
"crypto/tls"
"flag"
"fmt"
"io/ioutil"
golog "log"
"net/url"
"os"
"strings"
)
var (
v *bool
plain *bool
)
func gemget(u string, port int) error {
if !strings.HasPrefix(u, "gemini://") {
u = "gemini://" + u
}
parsed, err := url.Parse(u)
if err != nil {
die(fmt.Sprintf("error parsing url (%s): %s", u, err.Error()))
}
conn, err := tls.Dial("tcp", parsed.Host+fmt.Sprintf(":%d", port), &tls.Config{InsecureSkipVerify: true})
if err != nil {
die("tls error: ", err)
}
defer conn.Close()
conn.Write([]byte(u + "\r\n"))
// just dump the response if we want
if *plain {
resp, err := ioutil.ReadAll(bufio.NewReader(conn))
if err != nil {
die(err)
}
fmt.Println(string(resp))
return nil
}
var mimetype string
scanner := bufio.NewScanner(conn)
// read first line (status)
scanner.Scan()
statusline := scanner.Text()
switch statusline[0] {
case '1':
// INPUT
case '2':
// SUCCESS
mimetype = statusline[3:]
case '3':
// REDIRECT
log("redirecting to", statusline[3:])
return gemget(parsed.Host+"/"+statusline[3:], port)
case '6':
// CLIENT CERTIFICATE REQUIRED
default:
// reponse 4x or 5x
// FAILURE
die("error: ", statusline)
}
// get body
var s string
for scanner.Scan() {
s = s + scanner.Text() + "\n"
}
// remove final \n
s = s[:len(s)-1]
if strings.HasPrefix(mimetype, "text/gemini") {
s = *Prettify(&s)
}
fmt.Println(s)
return nil
}
// log prints timestamped diagnosis messages to stderr if verbose output is turned on.
func log(msg ...interface{}) {
if *v {
fmt.Fprint(os.Stderr, "\033[32m")
golog.Println(msg...)
fmt.Fprint(os.Stderr, "\033[m")
}
}
func die(msg ...interface{}) {
fmt.Fprintf(os.Stderr, "\033[31m%s\033[m\n", fmt.Sprint(msg...))
os.Exit(1)
}
func main() {
port := flag.Int("p", 1965, "port number")
plain = flag.Bool("plain", false, "print raw header and response (no formatting)")
v = flag.Bool("v", false, "print more information to stderr")
flag.Parse()
// only accept one url
if flag.NArg() != 1 {
die("give one url")
}
u := flag.Args()[0]
gemget(u, *port)
}
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