/
proxy.go
133 lines (115 loc) · 2.69 KB
/
proxy.go
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package handler
import (
"log"
"net/url"
"strings"
fastwebsocket "github.com/fasthttp/websocket"
"github.com/gofiber/contrib/websocket"
"github.com/gofiber/fiber/v2"
"golang.org/x/sync/errgroup"
)
func Proxy(c *fiber.Ctx) (err error) {
hs := strings.Split(c.Hostname(), ".")
id := hs[0]
urls := GetUrls()
u, ok := urls[id]
if !ok {
return c.SendStatus(fiber.StatusNotFound)
}
uu := url.URL{
Host: u.Host,
Path: u.Path,
RawQuery: u.Query,
}
if u.SSL {
uu.Scheme = "s"
}
uu.Path, err = url.JoinPath(uu.Path, c.Params("*"))
queries := uu.Query()
for k, v := range c.Queries() {
queries.Add(k, v)
}
uu.RawQuery = queries.Encode()
if websocket.IsWebSocketUpgrade(c) {
uu.Scheme = "ws" + uu.Scheme
return websocket.New(func(c *websocket.Conn) {
func(c *websocket.Conn) {
wg := new(errgroup.Group)
rc, _, err := fastwebsocket.DefaultDialer.Dial(uu.String(), nil)
if err != nil {
log.Println("dial error", err, "url", uu.String())
return
}
defer rc.Close()
wg.Go(func() error {
for {
messageType, message, err := rc.ReadMessage()
if err != nil {
log.Println("remote read error", err)
return err
}
err = c.WriteMessage(messageType, message)
if err != nil {
log.Println("client write error", err)
return err
}
}
})
wg.Go(func() error {
for {
messageType, message, err := c.ReadMessage()
if err != nil {
log.Println("client read error", err)
return err
}
err = rc.WriteMessage(messageType, message)
if err != nil {
log.Println("remote write error", err)
return err
}
}
})
err = wg.Wait()
if err != nil {
log.Println("ws error", err)
}
}(c)
})(c)
} else {
uu.Scheme = "http" + uu.Scheme
log.Println("request url", uu.String())
a := fiber.AcquireAgent()
req := a.Request()
// set request body
req.SetBody(c.BodyRaw())
req.Header.SetMethod(c.Method())
for k, v := range c.GetReqHeaders() {
switch strings.ToLower(k) {
case "connection":
continue
case "host":
req.Header.SetHost(v)
case "user-agent":
a.UserAgent(v)
default:
req.Header.Add(k, v)
log.Println("request heaer:", k, "=>", v)
}
}
req.SetRequestURI(uu.String())
resp := fiber.AcquireResponse()
defer fiber.ReleaseResponse(resp)
a.SetResponse(resp)
if err := a.Parse(); err != nil {
panic(err)
}
code, body, _ := a.Bytes()
resp.Header.VisitAll(func(key, value []byte) {
log.Println("response heaer:", string(key), "=>", string(value))
c.Response().Header.Add(string(key), string(value))
})
c.Status(code)
c.Write(body)
}
return nil
}