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package rpcplugin
import (
"io"
"net/http"
"net/rpc"
)
type LocalHTTPResponseWriter struct {
w http.ResponseWriter
}
func (w *LocalHTTPResponseWriter) Header(args struct{}, reply *http.Header) error {
*reply = w.w.Header()
return nil
}
func (w *LocalHTTPResponseWriter) Write(args []byte, reply *struct{}) error {
_, err := w.w.Write(args)
return err
}
func (w *LocalHTTPResponseWriter) WriteHeader(args int, reply *struct{}) error {
w.w.WriteHeader(args)
return nil
}
func (w *LocalHTTPResponseWriter) SyncHeader(args http.Header, reply *struct{}) error {
dest := w.w.Header()
for k := range dest {
if _, ok := args[k]; !ok {
delete(dest, k)
}
}
for k, v := range args {
dest[k] = v
}
return nil
}
func ServeHTTPResponseWriter(w http.ResponseWriter, conn io.ReadWriteCloser) {
server := rpc.NewServer()
server.Register(&LocalHTTPResponseWriter{
w: w,
})
server.ServeConn(conn)
}
type RemoteHTTPResponseWriter struct {
client *rpc.Client
header http.Header
}
var _ http.ResponseWriter = (*RemoteHTTPResponseWriter)(nil)
func (w *RemoteHTTPResponseWriter) Header() http.Header {
if w.header == nil {
w.client.Call("LocalHTTPResponseWriter.Header", struct{}{}, &w.header)
}
return w.header
}
func (w *RemoteHTTPResponseWriter) Write(b []byte) (int, error) {
if err := w.client.Call("LocalHTTPResponseWriter.SyncHeader", w.header, nil); err != nil {
return 0, err
}
if err := w.client.Call("LocalHTTPResponseWriter.Write", b, nil); err != nil {
return 0, err
}
return len(b), nil
}
func (w *RemoteHTTPResponseWriter) WriteHeader(statusCode int) {
if err := w.client.Call("LocalHTTPResponseWriter.SyncHeader", w.header, nil); err != nil {
return
}
w.client.Call("LocalHTTPResponseWriter.WriteHeader", statusCode, nil)
}
func (h *RemoteHTTPResponseWriter) Close() error {
return h.client.Close()
}
func ConnectHTTPResponseWriter(conn io.ReadWriteCloser) *RemoteHTTPResponseWriter {
return &RemoteHTTPResponseWriter{
client: rpc.NewClient(conn),
}
}
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