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