167 lines
3.2 KiB
Go
167 lines
3.2 KiB
Go
package hosts
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"net"
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"net/http"
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"github.com/go-gost/core/hosts"
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"github.com/go-gost/core/logger"
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"github.com/go-gost/plugin/hosts/proto"
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ctxvalue "github.com/go-gost/x/internal/ctx"
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"github.com/go-gost/x/internal/plugin"
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"google.golang.org/grpc"
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)
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type grpcPlugin struct {
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conn grpc.ClientConnInterface
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client proto.HostMapperClient
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log logger.Logger
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}
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// NewGRPCPlugin creates a HostMapper plugin based on gRPC.
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func NewGRPCPlugin(name string, addr string, opts ...plugin.Option) hosts.HostMapper {
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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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log := logger.Default().WithFields(map[string]any{
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"kind": "hosts",
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"hosts": name,
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})
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conn, err := plugin.NewGRPCConn(addr, &options)
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if err != nil {
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log.Error(err)
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}
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p := &grpcPlugin{
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conn: conn,
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log: log,
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}
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if conn != nil {
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p.client = proto.NewHostMapperClient(conn)
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}
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return p
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}
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func (p *grpcPlugin) Lookup(ctx context.Context, network, host string, opts ...hosts.Option) (ips []net.IP, ok bool) {
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p.log.Debugf("lookup %s/%s", host, network)
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if p.client == nil {
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return
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}
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r, err := p.client.Lookup(ctx,
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&proto.LookupRequest{
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Network: network,
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Host: host,
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Client: string(ctxvalue.ClientIDFromContext(ctx)),
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})
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if err != nil {
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p.log.Error(err)
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return
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}
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for _, s := range r.Ips {
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if ip := net.ParseIP(s); ip != nil {
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ips = append(ips, ip)
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}
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}
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ok = r.Ok
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return
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}
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func (p *grpcPlugin) Close() error {
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if closer, ok := p.conn.(io.Closer); ok {
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return closer.Close()
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}
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return nil
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}
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type httpPluginRequest struct {
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Network string `json:"network"`
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Host string `json:"host"`
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Client string `json:"client"`
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}
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type httpPluginResponse struct {
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IPs []string `json:"ips"`
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OK bool `json:"ok"`
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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 HostMapper plugin based on HTTP.
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func NewHTTPPlugin(name string, url string, opts ...plugin.Option) hosts.HostMapper {
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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": "hosts",
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"hosts": name,
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}),
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}
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}
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func (p *httpPlugin) Lookup(ctx context.Context, network, host string, opts ...hosts.Option) (ips []net.IP, ok bool) {
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p.log.Debugf("lookup %s/%s", host, network)
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if p.client == nil {
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return
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}
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rb := httpPluginRequest{
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Network: network,
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Host: host,
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Client: string(ctxvalue.ClientIDFromContext(ctx)),
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}
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v, err := json.Marshal(&rb)
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if err != nil {
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return
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, p.url, bytes.NewReader(v))
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if err != nil {
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return
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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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resp, err := p.client.Do(req)
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if err != nil {
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return
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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
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}
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res := httpPluginResponse{}
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if err := json.NewDecoder(resp.Body).Decode(&res); err != nil {
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return
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}
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for _, s := range res.IPs {
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if ip := net.ParseIP(s); ip != nil {
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ips = append(ips, ip)
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}
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}
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return ips, res.OK
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}
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