Ejemplo n.º 1
0
func (c *remoteContext) call(ctx context.Context, service, method string, in, out proto.Message) error {
	req, err := proto.Marshal(in)
	if err != nil {
		return fmt.Errorf("error marshalling request: %v", err)
	}

	remReq := &pb.Request{
		ServiceName: proto.String(service),
		Method:      proto.String(method),
		Request:     req,
		// NOTE(djd): RequestId is unused in the server.
	}

	req, err = proto.Marshal(remReq)
	if err != nil {
		return fmt.Errorf("proto.Marshal: %v", err)
	}

	// TODO(djd): Respect ctx.Deadline()?
	resp, err := c.client.Post(c.url, "application/octet-stream", bytes.NewReader(req))
	if err != nil {
		return fmt.Errorf("error sending request: %v", err)
	}
	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf("bad response %d; body: %q", resp.StatusCode, body)
	}
	if err != nil {
		return fmt.Errorf("failed reading response: %v", err)
	}
	remResp := &pb.Response{}
	if err := proto.Unmarshal(body, remResp); err != nil {
		return fmt.Errorf("error unmarshalling response: %v", err)
	}

	if ae := remResp.GetApplicationError(); ae != nil {
		return &internal.APIError{
			Code:    ae.GetCode(),
			Detail:  ae.GetDetail(),
			Service: service,
		}
	}

	if remResp.Response == nil {
		return fmt.Errorf("unexpected response: %s", proto.MarshalTextString(remResp))
	}

	return proto.Unmarshal(remResp.Response, out)
}
Ejemplo n.º 2
0
func makeRequest(params *Query, appID, versionID string) (*pb.LogReadRequest, error) {
	req := &pb.LogReadRequest{}
	req.AppId = &appID
	if !params.StartTime.IsZero() {
		req.StartTime = proto.Int64(params.StartTime.UnixNano() / 1e3)
	}
	if !params.EndTime.IsZero() {
		req.EndTime = proto.Int64(params.EndTime.UnixNano() / 1e3)
	}
	if len(params.Offset) > 0 {
		var offset pb.LogOffset
		if err := proto.Unmarshal(params.Offset, &offset); err != nil {
			return nil, fmt.Errorf("bad Offset: %v", err)
		}
		req.Offset = &offset
	}
	if params.Incomplete {
		req.IncludeIncomplete = &params.Incomplete
	}
	if params.AppLogs {
		req.IncludeAppLogs = &params.AppLogs
	}
	if params.ApplyMinLevel {
		req.MinimumLogLevel = proto.Int32(int32(params.MinLevel))
	}
	if params.Versions == nil {
		// If no versions were specified, default to the default module at
		// the major version being used by this module.
		if i := strings.Index(versionID, "."); i >= 0 {
			versionID = versionID[:i]
		}
		req.VersionId = []string{versionID}
	} else {
		req.ModuleVersion = make([]*pb.LogModuleVersion, 0, len(params.Versions))
		for _, v := range params.Versions {
			var m *string
			if i := strings.Index(v, ":"); i >= 0 {
				m, v = proto.String(v[:i]), v[i+1:]
			}
			req.ModuleVersion = append(req.ModuleVersion, &pb.LogModuleVersion{
				ModuleId:  m,
				VersionId: proto.String(v),
			})
		}
	}
	if params.RequestIDs != nil {
		ids := make([][]byte, len(params.RequestIDs))
		for i, v := range params.RequestIDs {
			ids[i] = []byte(v)
		}
		req.RequestId = ids
	}

	return req, nil
}
Ejemplo n.º 3
0
func (c *ProtoClient) Call(ctx context.Context, method string, req, resp proto.Message) error {
	payload, err := proto.Marshal(req)
	if err != nil {
		return err
	}

	httpReq, err := http.NewRequest("POST", c.endpoint+method, bytes.NewReader(payload))
	if err != nil {
		return err
	}
	httpReq.Header.Set("Content-Type", "application/x-protobuf")
	if ua := c.userAgent; ua != "" {
		httpReq.Header.Set("User-Agent", ua)
	}

	errc := make(chan error, 1)
	cancel := makeReqCancel(httpReq)

	go func() {
		r, err := c.client.Do(httpReq)
		if err != nil {
			errc <- err
			return
		}
		defer r.Body.Close()

		body, err := ioutil.ReadAll(r.Body)
		if r.StatusCode != http.StatusOK {
			err = &ErrHTTP{
				StatusCode: r.StatusCode,
				Body:       body,
				err:        err,
			}
		}
		if err != nil {
			errc <- err
			return
		}
		errc <- proto.Unmarshal(body, resp)
	}()

	select {
	case <-ctx.Done():
		cancel(c.client.Transport) // Cancel the HTTP request.
		return ctx.Err()
	case err := <-errc:
		return err
	}
}
Ejemplo n.º 4
0
// Decode decodes a cursor from its base-64 string representation.
func DecodeCursor(s string) (Cursor, error) {
	if s == "" {
		return Cursor{&zeroCC}, nil
	}
	if n := len(s) % 4; n != 0 {
		s += strings.Repeat("=", 4-n)
	}
	b, err := base64.URLEncoding.DecodeString(s)
	if err != nil {
		return Cursor{}, err
	}
	cc := &pb.CompiledCursor{}
	if err := proto.Unmarshal(b, cc); err != nil {
		return Cursor{}, err
	}
	return Cursor{cc}, nil
}
Ejemplo n.º 5
0
// DecodeKey decodes a key from the opaque representation returned by Encode.
func DecodeKey(encoded string) (*Key, error) {
	// Re-add padding.
	if m := len(encoded) % 4; m != 0 {
		encoded += strings.Repeat("=", 4-m)
	}

	b, err := base64.URLEncoding.DecodeString(encoded)
	if err != nil {
		return nil, err
	}

	pKey := new(pb.Key)
	if err := proto.Unmarshal(b, pKey); err != nil {
		return nil, err
	}
	return protoToKey(pKey)
}
Ejemplo n.º 6
0
func (protoCodec) Unmarshal(data []byte, v interface{}) error {
	return proto.Unmarshal(data, v.(proto.Message))
}
Ejemplo n.º 7
0
func Call(ctx netcontext.Context, service, method string, in, out proto.Message) error {
	if f, ctx, ok := callOverrideFromContext(ctx); ok {
		return f(ctx, service, method, in, out)
	}

	// Handle already-done contexts quickly.
	select {
	case <-ctx.Done():
		return ctx.Err()
	default:
	}

	c := fromContext(ctx)
	if c == nil {
		// Give a good error message rather than a panic lower down.
		return errors.New("not an App Engine context")
	}

	// Apply transaction modifications if we're in a transaction.
	if t := transactionFromContext(ctx); t != nil {
		if t.finished {
			return errors.New("transaction context has expired")
		}
		applyTransaction(in, &t.transaction)
	}

	// Default RPC timeout is 60s.
	timeout := 60 * time.Second
	if deadline, ok := ctx.Deadline(); ok {
		timeout = deadline.Sub(time.Now())
	}

	data, err := proto.Marshal(in)
	if err != nil {
		return err
	}

	ticket := c.req.Header.Get(ticketHeader)
	req := &remotepb.Request{
		ServiceName: &service,
		Method:      &method,
		Request:     data,
		RequestId:   &ticket,
	}
	hreqBody, err := proto.Marshal(req)
	if err != nil {
		return err
	}

	hrespBody, err := c.post(hreqBody, timeout)
	if err != nil {
		return err
	}

	res := &remotepb.Response{}
	if err := proto.Unmarshal(hrespBody, res); err != nil {
		return err
	}
	if res.RpcError != nil {
		ce := &CallError{
			Detail: res.RpcError.GetDetail(),
			Code:   *res.RpcError.Code,
		}
		switch remotepb.RpcError_ErrorCode(ce.Code) {
		case remotepb.RpcError_CANCELLED, remotepb.RpcError_DEADLINE_EXCEEDED:
			ce.Timeout = true
		}
		return ce
	}
	if res.ApplicationError != nil {
		return &APIError{
			Service: *req.ServiceName,
			Detail:  res.ApplicationError.GetDetail(),
			Code:    *res.ApplicationError.Code,
		}
	}
	if res.Exception != nil || res.JavaException != nil {
		// This shouldn't happen, but let's be defensive.
		return &CallError{
			Detail: "service bridge returned exception",
			Code:   int32(remotepb.RpcError_UNKNOWN),
		}
	}
	return proto.Unmarshal(res.Response, out)
}
Ejemplo n.º 8
0
func handle(w http.ResponseWriter, req *http.Request) {
	c := appengine.NewContext(req)

	u := user.Current(c)
	if u == nil {
		u, _ = user.CurrentOAuth(c,
			"https://www.googleapis.com/auth/cloud-platform",
			"https://www.googleapis.com/auth/appengine.apis",
		)
	}

	if u == nil || !u.Admin {
		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
		w.WriteHeader(http.StatusUnauthorized)
		io.WriteString(w, "You must be logged in as an administrator to access this.\n")
		return
	}
	if req.Header.Get("X-Appcfg-Api-Version") == "" {
		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
		w.WriteHeader(http.StatusForbidden)
		io.WriteString(w, "This request did not contain a necessary header.\n")
		return
	}

	if req.Method != "POST" {
		// Response must be YAML.
		rtok := req.FormValue("rtok")
		if rtok == "" {
			rtok = "0"
		}
		w.Header().Set("Content-Type", "text/yaml; charset=utf-8")
		fmt.Fprintf(w, `{app_id: %q, rtok: %q}`, internal.FullyQualifiedAppID(c), rtok)
		return
	}

	defer req.Body.Close()
	body, err := ioutil.ReadAll(req.Body)
	if err != nil {
		w.WriteHeader(http.StatusBadRequest)
		log.Errorf(c, "Failed reading body: %v", err)
		return
	}
	remReq := &pb.Request{}
	if err := proto.Unmarshal(body, remReq); err != nil {
		w.WriteHeader(http.StatusBadRequest)
		log.Errorf(c, "Bad body: %v", err)
		return
	}

	service, method := *remReq.ServiceName, *remReq.Method
	if !requestSupported(service, method) {
		w.WriteHeader(http.StatusBadRequest)
		log.Errorf(c, "Unsupported RPC /%s.%s", service, method)
		return
	}

	rawReq := &rawMessage{remReq.Request}
	rawRes := &rawMessage{}
	err = internal.Call(c, service, method, rawReq, rawRes)

	remRes := &pb.Response{}
	if err == nil {
		remRes.Response = rawRes.buf
	} else if ae, ok := err.(*internal.APIError); ok {
		remRes.ApplicationError = &pb.ApplicationError{
			Code:   &ae.Code,
			Detail: &ae.Detail,
		}
	} else {
		// This shouldn't normally happen.
		log.Errorf(c, "appengine/remote_api: Unexpected error of type %T: %v", err, err)
		remRes.ApplicationError = &pb.ApplicationError{
			Code:   proto.Int32(0),
			Detail: proto.String(err.Error()),
		}
	}
	out, err := proto.Marshal(remRes)
	if err != nil {
		// This should not be possible.
		w.WriteHeader(500)
		log.Errorf(c, "proto.Marshal: %v", err)
		return
	}

	log.Infof(c, "Spooling %d bytes of response to /%s.%s", len(out), service, method)
	w.Header().Set("Content-Type", "application/octet-stream")
	w.Header().Set("Content-Length", strconv.Itoa(len(out)))
	w.Write(out)
}