github.com/cjdelisle/matterfoss@v5.11.1+incompatible/plugin/http.go (about)

     1  // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
     2  // See LICENSE.txt for license information.
     3  
     4  package plugin
     5  
     6  import (
     7  	"io"
     8  	"net/http"
     9  	"net/rpc"
    10  )
    11  
    12  type httpResponseWriterRPCServer struct {
    13  	w http.ResponseWriter
    14  }
    15  
    16  func (w *httpResponseWriterRPCServer) Header(args struct{}, reply *http.Header) error {
    17  	*reply = w.w.Header()
    18  	return nil
    19  }
    20  
    21  func (w *httpResponseWriterRPCServer) Write(args []byte, reply *struct{}) error {
    22  	_, err := w.w.Write(args)
    23  	return err
    24  }
    25  
    26  func (w *httpResponseWriterRPCServer) WriteHeader(args int, reply *struct{}) error {
    27  	w.w.WriteHeader(args)
    28  	return nil
    29  }
    30  
    31  func (w *httpResponseWriterRPCServer) SyncHeader(args http.Header, reply *struct{}) error {
    32  	dest := w.w.Header()
    33  	for k := range dest {
    34  		if _, ok := args[k]; !ok {
    35  			delete(dest, k)
    36  		}
    37  	}
    38  	for k, v := range args {
    39  		dest[k] = v
    40  	}
    41  	return nil
    42  }
    43  
    44  type httpResponseWriterRPCClient struct {
    45  	client *rpc.Client
    46  	header http.Header
    47  }
    48  
    49  var _ http.ResponseWriter = (*httpResponseWriterRPCClient)(nil)
    50  
    51  func (w *httpResponseWriterRPCClient) Header() http.Header {
    52  	if w.header == nil {
    53  		w.client.Call("Plugin.Header", struct{}{}, &w.header)
    54  	}
    55  	return w.header
    56  }
    57  
    58  func (w *httpResponseWriterRPCClient) Write(b []byte) (int, error) {
    59  	if err := w.client.Call("Plugin.SyncHeader", w.header, nil); err != nil {
    60  		return 0, err
    61  	}
    62  	if err := w.client.Call("Plugin.Write", b, nil); err != nil {
    63  		return 0, err
    64  	}
    65  	return len(b), nil
    66  }
    67  
    68  func (w *httpResponseWriterRPCClient) WriteHeader(statusCode int) {
    69  	if err := w.client.Call("Plugin.SyncHeader", w.header, nil); err != nil {
    70  		return
    71  	}
    72  	w.client.Call("Plugin.WriteHeader", statusCode, nil)
    73  }
    74  
    75  func (h *httpResponseWriterRPCClient) Close() error {
    76  	return h.client.Close()
    77  }
    78  
    79  func connectHTTPResponseWriter(conn io.ReadWriteCloser) *httpResponseWriterRPCClient {
    80  	return &httpResponseWriterRPCClient{
    81  		client: rpc.NewClient(conn),
    82  	}
    83  }