136 lines
2.4 KiB
Go
136 lines
2.4 KiB
Go
package gemini
|
|
|
|
import (
|
|
"bufio"
|
|
"crypto/tls"
|
|
"errors"
|
|
"io/ioutil"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
var (
|
|
ProtocolError = errors.New("Protocol error")
|
|
)
|
|
|
|
// Client is a Gemini client.
|
|
type Client struct {
|
|
TLSConfig tls.Config
|
|
}
|
|
|
|
func (c *Client) Get(url string) (*Response, error) {
|
|
req, err := NewRequest(url)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return c.Do(req)
|
|
}
|
|
|
|
func (c *Client) GetProxy(host, url string) (*Response, error) {
|
|
req, err := NewProxyRequest(host, url)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return c.Do(req)
|
|
}
|
|
|
|
// Request is a Gemini request.
|
|
type Request struct {
|
|
Host string // host or host:port
|
|
URL *url.URL // The URL to request
|
|
}
|
|
|
|
// NewRequest returns a new request. The host is inferred from the provided url.
|
|
func NewRequest(rawurl string) (*Request, error) {
|
|
u, err := url.Parse(rawurl)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Ignore UserInfo if present
|
|
u.User = nil
|
|
|
|
return &Request{
|
|
Host: u.Host,
|
|
URL: u,
|
|
}, nil
|
|
}
|
|
|
|
// NewProxyRequest makes a new request using the provided host.
|
|
func NewProxyRequest(host, rawurl string) (*Request, error) {
|
|
u, err := url.Parse(rawurl)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Ignore UserInfo if present
|
|
u.User = nil
|
|
|
|
return &Request{
|
|
Host: host,
|
|
URL: u,
|
|
}, nil
|
|
}
|
|
|
|
func (c *Client) Do(req *Request) (*Response, error) {
|
|
host := req.Host
|
|
if strings.LastIndex(host, ":") == -1 {
|
|
// The default port is 1965
|
|
host += ":1965"
|
|
}
|
|
|
|
config := &tls.Config{
|
|
// Allow self-signed certificates
|
|
// TODO: Trust on first use
|
|
InsecureSkipVerify: true,
|
|
}
|
|
conn, err := tls.Dial("tcp", host, config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer conn.Close()
|
|
|
|
// Write the request
|
|
request := req.URL.String() + "\r\n"
|
|
if _, err := conn.Write([]byte(request)); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Read the response header
|
|
code := make([]byte, 2)
|
|
if _, err := conn.Read(code); err != nil {
|
|
return nil, err
|
|
}
|
|
status, err := strconv.Atoi(string(code))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Read one space
|
|
space := make([]byte, 1)
|
|
if _, err := conn.Read(space); err != nil {
|
|
return nil, err
|
|
}
|
|
if space[0] != ' ' {
|
|
return nil, ProtocolError
|
|
}
|
|
|
|
// Read the meta
|
|
scanner := bufio.NewScanner(conn)
|
|
scanner.Scan()
|
|
meta := scanner.Text()
|
|
|
|
// Read the response body
|
|
body, err := ioutil.ReadAll(conn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &Response{
|
|
Status: status,
|
|
Meta: meta,
|
|
Body: body,
|
|
}, nil
|
|
}
|