3 * Copyright 2015 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
25 #include "byte_buffer.h"
27 #include "call_credentials.h"
29 #include "completion_queue.h"
30 #include "grpc/grpc.h"
31 #include "grpc/grpc_security.h"
32 #include "grpc/support/alloc.h"
33 #include "grpc/support/log.h"
34 #include "grpc/support/time.h"
38 using std::unique_ptr;
39 using std::shared_ptr;
46 using Nan::EscapableHandleScope;
47 using Nan::HandleScope;
49 using Nan::MaybeLocal;
50 using Nan::ObjectWrap;
51 using Nan::Persistent;
52 using Nan::Utf8String;
59 using v8::FunctionTemplate;
64 using v8::ObjectTemplate;
69 Callback *Call::constructor;
70 Persistent<FunctionTemplate> Call::fun_tpl;
73 * Helper function for throwing errors with a grpc_call_error value.
74 * Modified from the answer by Gus Goose to
75 * http://stackoverflow.com/questions/31794200.
77 Local<Value> nanErrorWithCode(const char *msg, grpc_call_error code) {
78 EscapableHandleScope scope;
79 Local<Object> err = Nan::Error(msg).As<Object>();
80 Nan::Set(err, Nan::New("code").ToLocalChecked(), Nan::New<Uint32>(code));
81 return scope.Escape(err);
84 bool CreateMetadataArray(Local<Object> metadata_obj, grpc_metadata_array *array) {
86 Local<Value> metadata_value = (Nan::Get(metadata_obj, Nan::New("metadata").ToLocalChecked())).ToLocalChecked();
87 if (!metadata_value->IsObject()) {
90 Local<Object> metadata = Nan::To<Object>(metadata_value).ToLocalChecked();
91 Local<Array> keys = Nan::GetOwnPropertyNames(metadata).ToLocalChecked();
92 for (unsigned int i = 0; i < keys->Length(); i++) {
93 Local<String> current_key =
94 Nan::To<String>(Nan::Get(keys, i).ToLocalChecked()).ToLocalChecked();
95 Local<Value> value_array = Nan::Get(metadata, current_key).ToLocalChecked();
96 if (!value_array->IsArray()) {
99 array->capacity += Local<Array>::Cast(value_array)->Length();
101 array->metadata = reinterpret_cast<grpc_metadata *>(
102 gpr_zalloc(array->capacity * sizeof(grpc_metadata)));
103 for (unsigned int i = 0; i < keys->Length(); i++) {
104 Local<String> current_key(Nan::To<String>(Nan::Get(keys, i).ToLocalChecked()).ToLocalChecked());
105 Local<Array> values =
106 Local<Array>::Cast(Nan::Get(metadata, current_key).ToLocalChecked());
107 grpc_slice key_slice = CreateSliceFromString(current_key);
108 grpc_slice key_intern_slice = grpc_slice_intern(key_slice);
109 grpc_slice_unref(key_slice);
110 for (unsigned int j = 0; j < values->Length(); j++) {
111 Local<Value> value = Nan::Get(values, j).ToLocalChecked();
112 grpc_metadata *current = &array->metadata[array->count];
113 current->key = key_intern_slice;
114 // Only allow binary headers for "-bin" keys
115 if (grpc_is_binary_header(key_intern_slice)) {
116 if (::node::Buffer::HasInstance(value)) {
117 current->value = CreateSliceFromBuffer(value);
122 if (value->IsString()) {
123 Local<String> string_value = Nan::To<String>(value).ToLocalChecked();
124 current->value = CreateSliceFromString(string_value);
135 void DestroyMetadataArray(grpc_metadata_array *array) {
136 for (size_t i = 0; i < array->count; i++) {
137 // Don't unref keys because they are interned
138 grpc_slice_unref(array->metadata[i].value);
140 grpc_metadata_array_destroy(array);
143 Local<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
144 EscapableHandleScope scope;
145 grpc_metadata *metadata_elements = metadata_array->metadata;
146 size_t length = metadata_array->count;
147 Local<Object> metadata_object = Nan::New<Object>();
148 for (unsigned int i = 0; i < length; i++) {
149 grpc_metadata *elem = &metadata_elements[i];
150 // TODO(murgatroid99): Use zero-copy string construction instead
151 Local<String> key_string = CopyStringFromSlice(elem->key);
153 MaybeLocal<Value> maybe_array = Nan::Get(metadata_object, key_string);
154 if (maybe_array.IsEmpty() || !maybe_array.ToLocalChecked()->IsArray()) {
155 array = Nan::New<Array>(0);
156 Nan::Set(metadata_object, key_string, array);
158 array = Local<Array>::Cast(maybe_array.ToLocalChecked());
160 if (grpc_is_binary_header(elem->key)) {
161 Nan::Set(array, array->Length(), CopyBufferFromSlice(elem->value));
163 // TODO(murgatroid99): Use zero-copy string construction instead
164 Nan::Set(array, array->Length(), CopyStringFromSlice(elem->value));
167 Local<Object> result = Nan::New<Object>();
168 Nan::Set(result, Nan::New("metadata").ToLocalChecked(), metadata_object);
169 Nan::Set(result, Nan::New("flags").ToLocalChecked(), Nan::New<v8::Uint32>(0));
170 return scope.Escape(result);
173 Local<Value> Op::GetOpType() const {
174 EscapableHandleScope scope;
175 return scope.Escape(Nan::New(GetTypeString()).ToLocalChecked());
180 class SendMetadataOp : public Op {
182 SendMetadataOp() { grpc_metadata_array_init(&send_metadata); }
183 ~SendMetadataOp() { DestroyMetadataArray(&send_metadata); }
184 Local<Value> GetNodeValue() const {
185 EscapableHandleScope scope;
186 return scope.Escape(Nan::True());
188 bool ParseOp(Local<Value> value, grpc_op *out) {
189 if (!value->IsObject()) {
192 MaybeLocal<Object> maybe_metadata = Nan::To<Object>(value);
193 if (maybe_metadata.IsEmpty()) {
196 Local<Object> metadata_object = maybe_metadata.ToLocalChecked();
197 MaybeLocal<Value> maybe_flag_value =
198 Nan::Get(metadata_object, Nan::New("flags").ToLocalChecked());
199 if (!maybe_flag_value.IsEmpty()) {
200 Local<Value> flag_value = maybe_flag_value.ToLocalChecked();
201 if (flag_value->IsUint32()) {
202 Maybe<uint32_t> maybe_flag = Nan::To<uint32_t>(flag_value);
203 out->flags |= maybe_flag.FromMaybe(0) & GRPC_INITIAL_METADATA_USED_MASK;
206 if (!CreateMetadataArray(metadata_object, &send_metadata)) {
209 out->data.send_initial_metadata.count = send_metadata.count;
210 out->data.send_initial_metadata.metadata = send_metadata.metadata;
213 bool IsFinalOp() { return false; }
214 void OnComplete(bool success) {}
217 std::string GetTypeString() const { return "send_metadata"; }
220 grpc_metadata_array send_metadata;
223 class SendMessageOp : public Op {
225 SendMessageOp() { send_message = NULL; }
227 if (send_message != NULL) {
228 grpc_byte_buffer_destroy(send_message);
231 Local<Value> GetNodeValue() const {
232 EscapableHandleScope scope;
233 return scope.Escape(Nan::True());
235 bool ParseOp(Local<Value> value, grpc_op *out) {
236 if (!::node::Buffer::HasInstance(value)) {
239 Local<Object> object_value = Nan::To<Object>(value).ToLocalChecked();
240 MaybeLocal<Value> maybe_flag_value =
241 Nan::Get(object_value, Nan::New("grpcWriteFlags").ToLocalChecked());
242 if (!maybe_flag_value.IsEmpty()) {
243 Local<Value> flag_value = maybe_flag_value.ToLocalChecked();
244 if (flag_value->IsUint32()) {
245 Maybe<uint32_t> maybe_flag = Nan::To<uint32_t>(flag_value);
246 out->flags |= maybe_flag.FromMaybe(0) & GRPC_WRITE_USED_MASK;
249 send_message = BufferToByteBuffer(value);
250 out->data.send_message.send_message = send_message;
254 bool IsFinalOp() { return false; }
255 void OnComplete(bool success) {}
258 std::string GetTypeString() const { return "send_message"; }
261 grpc_byte_buffer *send_message;
264 class SendClientCloseOp : public Op {
266 Local<Value> GetNodeValue() const {
267 EscapableHandleScope scope;
268 return scope.Escape(Nan::True());
271 bool ParseOp(Local<Value> value, grpc_op *out) { return true; }
272 bool IsFinalOp() { return false; }
273 void OnComplete(bool success) {}
276 std::string GetTypeString() const { return "client_close"; }
279 class SendServerStatusOp : public Op {
281 SendServerStatusOp() {
282 details = grpc_empty_slice();
283 grpc_metadata_array_init(&status_metadata);
285 ~SendServerStatusOp() {
286 grpc_slice_unref(details);
287 DestroyMetadataArray(&status_metadata);
289 Local<Value> GetNodeValue() const {
290 EscapableHandleScope scope;
291 return scope.Escape(Nan::True());
293 bool ParseOp(Local<Value> value, grpc_op *out) {
294 if (!value->IsObject()) {
297 Local<Object> server_status = Nan::To<Object>(value).ToLocalChecked();
298 MaybeLocal<Value> maybe_metadata =
299 Nan::Get(server_status, Nan::New("metadata").ToLocalChecked());
300 if (maybe_metadata.IsEmpty()) {
303 if (!maybe_metadata.ToLocalChecked()->IsObject()) {
306 Local<Object> metadata =
307 Nan::To<Object>(maybe_metadata.ToLocalChecked()).ToLocalChecked();
308 MaybeLocal<Value> maybe_code =
309 Nan::Get(server_status, Nan::New("code").ToLocalChecked());
310 if (maybe_code.IsEmpty()) {
313 if (!maybe_code.ToLocalChecked()->IsUint32()) {
316 uint32_t code = Nan::To<uint32_t>(maybe_code.ToLocalChecked()).FromJust();
317 MaybeLocal<Value> maybe_details =
318 Nan::Get(server_status, Nan::New("details").ToLocalChecked());
319 if (maybe_details.IsEmpty()) {
322 if (!maybe_details.ToLocalChecked()->IsString()) {
325 Local<String> details =
326 Nan::To<String>(maybe_details.ToLocalChecked()).ToLocalChecked();
327 if (!CreateMetadataArray(metadata, &status_metadata)) {
330 out->data.send_status_from_server.trailing_metadata_count =
331 status_metadata.count;
332 out->data.send_status_from_server.trailing_metadata =
333 status_metadata.metadata;
334 out->data.send_status_from_server.status =
335 static_cast<grpc_status_code>(code);
336 this->details = CreateSliceFromString(details);
337 out->data.send_status_from_server.status_details = &this->details;
340 bool IsFinalOp() { return true; }
341 void OnComplete(bool success) {}
344 std::string GetTypeString() const { return "send_status"; }
348 grpc_metadata_array status_metadata;
351 class GetMetadataOp : public Op {
353 GetMetadataOp() { grpc_metadata_array_init(&recv_metadata); }
355 ~GetMetadataOp() { grpc_metadata_array_destroy(&recv_metadata); }
357 Local<Value> GetNodeValue() const {
358 EscapableHandleScope scope;
359 return scope.Escape(ParseMetadata(&recv_metadata));
362 bool ParseOp(Local<Value> value, grpc_op *out) {
363 out->data.recv_initial_metadata.recv_initial_metadata = &recv_metadata;
366 bool IsFinalOp() { return false; }
367 void OnComplete(bool success) {}
370 std::string GetTypeString() const { return "metadata"; }
373 grpc_metadata_array recv_metadata;
376 class ReadMessageOp : public Op {
378 ReadMessageOp() { recv_message = NULL; }
380 if (recv_message != NULL) {
381 grpc_byte_buffer_destroy(recv_message);
384 Local<Value> GetNodeValue() const {
385 EscapableHandleScope scope;
386 return scope.Escape(ByteBufferToBuffer(recv_message));
389 bool ParseOp(Local<Value> value, grpc_op *out) {
390 out->data.recv_message.recv_message = &recv_message;
393 bool IsFinalOp() { return false; }
394 void OnComplete(bool success) {}
397 std::string GetTypeString() const { return "read"; }
400 grpc_byte_buffer *recv_message;
403 class ClientStatusOp : public Op {
406 grpc_metadata_array_init(&metadata_array);
407 status_details = grpc_empty_slice();
411 grpc_metadata_array_destroy(&metadata_array);
412 grpc_slice_unref(status_details);
415 bool ParseOp(Local<Value> value, grpc_op *out) {
416 out->data.recv_status_on_client.trailing_metadata = &metadata_array;
417 out->data.recv_status_on_client.status = &status;
418 out->data.recv_status_on_client.status_details = &status_details;
422 Local<Value> GetNodeValue() const {
423 EscapableHandleScope scope;
424 Local<Object> status_obj = Nan::New<Object>();
425 Nan::Set(status_obj, Nan::New("code").ToLocalChecked(),
426 Nan::New<Number>(status));
427 Nan::Set(status_obj, Nan::New("details").ToLocalChecked(),
428 CopyStringFromSlice(status_details));
429 Nan::Set(status_obj, Nan::New("metadata").ToLocalChecked(),
430 ParseMetadata(&metadata_array));
431 return scope.Escape(status_obj);
433 bool IsFinalOp() { return true; }
434 void OnComplete(bool success) {}
437 std::string GetTypeString() const { return "status"; }
440 grpc_metadata_array metadata_array;
441 grpc_status_code status;
442 grpc_slice status_details;
445 class ServerCloseResponseOp : public Op {
447 Local<Value> GetNodeValue() const {
448 EscapableHandleScope scope;
449 return scope.Escape(Nan::New<Boolean>(cancelled));
452 bool ParseOp(Local<Value> value, grpc_op *out) {
453 out->data.recv_close_on_server.cancelled = &cancelled;
456 bool IsFinalOp() { return false; }
457 void OnComplete(bool success) {}
460 std::string GetTypeString() const { return "cancelled"; }
466 tag::tag(Callback *callback, OpVec *ops, Call *call, Local<Value> call_value)
467 : callback(callback),
468 async_resource(NULL),
472 async_resource = new Nan::AsyncResource("grpc:tag"); // Needs handle scope.
473 call_persist.Reset(call_value);
478 delete async_resource;
482 void CompleteTag(void *tag, const char *error_message) {
484 struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
485 Callback *callback = tag_struct->callback;
486 if (error_message == NULL) {
487 Local<Object> tag_obj = Nan::New<Object>();
488 for (vector<unique_ptr<Op> >::iterator it = tag_struct->ops->begin();
489 it != tag_struct->ops->end(); ++it) {
490 Op *op_ptr = it->get();
491 Nan::Set(tag_obj, op_ptr->GetOpType(), op_ptr->GetNodeValue());
493 Local<Value> argv[] = {Nan::Null(), tag_obj};
494 callback->Call(2, argv, tag_struct->async_resource);
496 Local<Value> argv[] = {Nan::Error(error_message)};
497 callback->Call(1, argv, tag_struct->async_resource);
499 bool success = (error_message == NULL);
500 bool is_final_op = false;
501 for (vector<unique_ptr<Op> >::iterator it = tag_struct->ops->begin();
502 it != tag_struct->ops->end(); ++it) {
503 Op *op_ptr = it->get();
504 op_ptr->OnComplete(success);
505 if (op_ptr->IsFinalOp()) {
509 if (tag_struct->call == NULL) {
512 tag_struct->call->CompleteBatch(is_final_op);
515 void DestroyTag(void *tag) {
516 struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
520 void Call::DestroyCall() {
521 if (this->wrapped_call != NULL) {
522 grpc_call_unref(this->wrapped_call);
523 this->wrapped_call = NULL;
527 Call::Call(grpc_call *call)
528 : wrapped_call(call), pending_batches(0), has_final_op_completed(false) {
529 peer = grpc_call_get_peer(call);
537 void Call::Init(Local<Object> exports) {
539 Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
540 tpl->SetClassName(Nan::New("Call").ToLocalChecked());
541 tpl->InstanceTemplate()->SetInternalFieldCount(1);
542 Nan::SetPrototypeMethod(tpl, "startBatch", StartBatch);
543 Nan::SetPrototypeMethod(tpl, "cancel", Cancel);
544 Nan::SetPrototypeMethod(tpl, "cancelWithStatus", CancelWithStatus);
545 Nan::SetPrototypeMethod(tpl, "getPeer", GetPeer);
546 Nan::SetPrototypeMethod(tpl, "setCredentials", SetCredentials);
548 Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
549 Nan::Set(exports, Nan::New("Call").ToLocalChecked(), ctr);
550 constructor = new Callback(ctr);
553 bool Call::HasInstance(Local<Value> val) {
555 return Nan::New(fun_tpl)->HasInstance(val);
558 grpc_call *Call::GetWrappedCall() { return this->wrapped_call; }
560 Local<Value> Call::WrapStruct(grpc_call *call) {
561 EscapableHandleScope scope;
563 return scope.Escape(Nan::Null());
566 Local<Value> argv[argc] = {
567 Nan::New<External>(reinterpret_cast<void *>(call))};
568 MaybeLocal<Object> maybe_instance =
569 Nan::NewInstance(constructor->GetFunction(), argc, argv);
570 if (maybe_instance.IsEmpty()) {
571 return scope.Escape(Nan::Null());
573 return scope.Escape(maybe_instance.ToLocalChecked());
577 void Call::CompleteBatch(bool is_final_op) {
579 this->has_final_op_completed = true;
581 this->pending_batches--;
582 if (this->has_final_op_completed && this->pending_batches == 0) {
587 NAN_METHOD(Call::New) {
589 * 0: Channel to make the call on
594 * 5: propagation flags
596 if (info.IsConstructCall()) {
598 if (!info[0]->IsExternal()) {
599 return Nan::ThrowTypeError(
600 "Call can only be created with Channel.createCall");
602 Local<External> ext = info[0].As<External>();
603 // This option is used for wrapping an existing call
604 grpc_call *call_value = reinterpret_cast<grpc_call *>(ext->Value());
605 call = new Call(call_value);
606 call->Wrap(info.This());
607 info.GetReturnValue().Set(info.This());
610 return Nan::ThrowTypeError(
611 "Call can only be created with Channel.createCall");
615 NAN_METHOD(Call::StartBatch) {
616 if (!Call::HasInstance(info.This())) {
617 return Nan::ThrowTypeError("startBatch can only be called on Call objects");
619 if (!info[0]->IsObject()) {
620 return Nan::ThrowError("startBatch's first argument must be an object");
622 if (!info[1]->IsFunction()) {
623 return Nan::ThrowError("startBatch's second argument must be a callback");
625 Local<Function> callback_func = info[1].As<Function>();
626 Call *call = ObjectWrap::Unwrap<Call>(info.This());
627 if (call->wrapped_call == NULL) {
628 /* This implies that the call has completed and has been destroyed. To
630 * previous behavior, we should call the callback immediately with an error,
631 * as though the batch had failed in core */
632 Local<Value> argv[] = {
633 Nan::Error("The async function failed because the call has completed")};
634 Nan::Call(callback_func, Nan::New<Object>(), 1, argv);
637 Local<Object> obj = Nan::To<Object>(info[0]).ToLocalChecked();
638 Local<Array> keys = Nan::GetOwnPropertyNames(obj).ToLocalChecked();
639 size_t nops = keys->Length();
640 vector<grpc_op> ops(nops);
641 unique_ptr<OpVec> op_vector(new OpVec());
642 for (unsigned int i = 0; i < nops; i++) {
644 MaybeLocal<Value> maybe_key = Nan::Get(keys, i);
645 if (maybe_key.IsEmpty() || (!maybe_key.ToLocalChecked()->IsUint32())) {
646 return Nan::ThrowError(
647 "startBatch's first argument's keys must be integers");
649 uint32_t type = Nan::To<uint32_t>(maybe_key.ToLocalChecked()).FromJust();
650 ops[i].op = static_cast<grpc_op_type>(type);
652 ops[i].reserved = NULL;
654 case GRPC_OP_SEND_INITIAL_METADATA:
655 op.reset(new SendMetadataOp());
657 case GRPC_OP_SEND_MESSAGE:
658 op.reset(new SendMessageOp());
660 case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
661 op.reset(new SendClientCloseOp());
663 case GRPC_OP_SEND_STATUS_FROM_SERVER:
664 op.reset(new SendServerStatusOp());
666 case GRPC_OP_RECV_INITIAL_METADATA:
667 op.reset(new GetMetadataOp());
669 case GRPC_OP_RECV_MESSAGE:
670 op.reset(new ReadMessageOp());
672 case GRPC_OP_RECV_STATUS_ON_CLIENT:
673 op.reset(new ClientStatusOp());
675 case GRPC_OP_RECV_CLOSE_ON_SERVER:
676 op.reset(new ServerCloseResponseOp());
679 return Nan::ThrowError("Argument object had an unrecognized key");
681 if (!op->ParseOp(Nan::Get(obj, type).ToLocalChecked(), &ops[i])) {
682 return Nan::ThrowTypeError("Incorrectly typed arguments to startBatch");
684 op_vector->push_back(std::move(op));
686 Callback *callback = new Callback(callback_func);
687 grpc_call_error error = grpc_call_start_batch(
688 call->wrapped_call, &ops[0], nops,
689 new struct tag(callback, op_vector.release(), call, info.This()), NULL);
690 if (error != GRPC_CALL_OK) {
691 return Nan::ThrowError(nanErrorWithCode("startBatch failed", error));
693 call->pending_batches++;
694 CompletionQueueNext();
697 NAN_METHOD(Call::Cancel) {
698 if (!Call::HasInstance(info.This())) {
699 return Nan::ThrowTypeError("cancel can only be called on Call objects");
701 Call *call = ObjectWrap::Unwrap<Call>(info.This());
702 if (call->wrapped_call == NULL) {
703 /* Cancel is supposed to be idempotent. If the call has already finished,
704 * cancel should just complete silently */
707 grpc_call_error error = grpc_call_cancel(call->wrapped_call, NULL);
708 if (error != GRPC_CALL_OK) {
709 return Nan::ThrowError(nanErrorWithCode("cancel failed", error));
713 NAN_METHOD(Call::CancelWithStatus) {
714 Nan::HandleScope scope;
715 if (!HasInstance(info.This())) {
716 return Nan::ThrowTypeError("cancel can only be called on Call objects");
718 if (!info[0]->IsUint32()) {
719 return Nan::ThrowTypeError(
720 "cancelWithStatus's first argument must be a status code");
722 if (!info[1]->IsString()) {
723 return Nan::ThrowTypeError(
724 "cancelWithStatus's second argument must be a string");
726 Call *call = ObjectWrap::Unwrap<Call>(info.This());
727 if (call->wrapped_call == NULL) {
728 /* Cancel is supposed to be idempotent. If the call has already finished,
729 * cancel should just complete silently */
732 grpc_status_code code =
733 static_cast<grpc_status_code>(Nan::To<uint32_t>(info[0]).FromJust());
734 if (code == GRPC_STATUS_OK) {
735 return Nan::ThrowRangeError(
736 "cancelWithStatus cannot be called with OK status");
738 Utf8String details(info[1]);
739 grpc_call_cancel_with_status(call->wrapped_call, code, *details, NULL);
742 NAN_METHOD(Call::GetPeer) {
743 Nan::HandleScope scope;
744 if (!HasInstance(info.This())) {
745 return Nan::ThrowTypeError("getPeer can only be called on Call objects");
747 Call *call = ObjectWrap::Unwrap<Call>(info.This());
748 Local<Value> peer_value = Nan::New(call->peer).ToLocalChecked();
749 info.GetReturnValue().Set(peer_value);
752 NAN_METHOD(Call::SetCredentials) {
753 Nan::HandleScope scope;
754 if (!HasInstance(info.This())) {
755 return Nan::ThrowTypeError(
756 "setCredentials can only be called on Call objects");
758 if (!CallCredentials::HasInstance(info[0])) {
759 return Nan::ThrowTypeError(
760 "setCredentials' first argument must be a CallCredentials");
762 Call *call = ObjectWrap::Unwrap<Call>(info.This());
763 if (call->wrapped_call == NULL) {
764 return Nan::ThrowError(
765 "Cannot set credentials on a call that has already started");
767 CallCredentials *creds_object = ObjectWrap::Unwrap<CallCredentials>(
768 Nan::To<Object>(info[0]).ToLocalChecked());
769 grpc_call_credentials *creds = creds_object->GetWrappedCredentials();
770 grpc_call_error error = GRPC_CALL_ERROR;
772 error = grpc_call_set_credentials(call->wrapped_call, creds);
774 info.GetReturnValue().Set(Nan::New<Uint32>(error));