84 lines
1.6 KiB
Go
84 lines
1.6 KiB
Go
package router
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"net"
|
|
"net/http"
|
|
|
|
"github.com/go-gost/core/logger"
|
|
"github.com/go-gost/core/router"
|
|
"github.com/go-gost/x/internal/plugin"
|
|
xrouter "github.com/go-gost/x/router"
|
|
)
|
|
|
|
type httpPluginGetRouteRequest struct {
|
|
Dst string `json:"dst"`
|
|
}
|
|
|
|
type httpPluginGetRouteResponse struct {
|
|
Net string `json:"net"`
|
|
Gateway string `json:"gateway"`
|
|
}
|
|
|
|
type httpPlugin struct {
|
|
url string
|
|
client *http.Client
|
|
header http.Header
|
|
log logger.Logger
|
|
}
|
|
|
|
// NewHTTPPlugin creates an Router plugin based on HTTP.
|
|
func NewHTTPPlugin(name string, url string, opts ...plugin.Option) router.Router {
|
|
var options plugin.Options
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
return &httpPlugin{
|
|
url: url,
|
|
client: plugin.NewHTTPClient(&options),
|
|
header: options.Header,
|
|
log: logger.Default().WithFields(map[string]any{
|
|
"kind": "router",
|
|
"router": name,
|
|
}),
|
|
}
|
|
}
|
|
|
|
func (p *httpPlugin) GetRoute(ctx context.Context, dst net.IP, opts ...router.Option) *router.Route {
|
|
if p.client == nil {
|
|
return nil
|
|
}
|
|
|
|
req, err := http.NewRequestWithContext(ctx, http.MethodGet, p.url, nil)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
if p.header != nil {
|
|
req.Header = p.header.Clone()
|
|
}
|
|
req.Header.Set("Content-Type", "application/json")
|
|
|
|
q := req.URL.Query()
|
|
q.Set("dst", dst.String())
|
|
req.URL.RawQuery = q.Encode()
|
|
|
|
resp, err := p.client.Do(req)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
if resp.StatusCode != http.StatusOK {
|
|
return nil
|
|
}
|
|
|
|
res := httpPluginGetRouteResponse{}
|
|
if err := json.NewDecoder(resp.Body).Decode(&res); err != nil {
|
|
return nil
|
|
}
|
|
|
|
return xrouter.ParseRoute(res.Net, res.Gateway)
|
|
}
|