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#include <malloc.h>
#include <vector>
#include <node.h>
#include <nan.h>
#include "grpc/grpc.h"
#include "grpc/grpc_security.h"
#include "channel.h"
#include "credentials.h"
namespace grpc {
namespace node {
using v8::Arguments;
using v8::Array;
using v8::Exception;
using v8::Function;
using v8::FunctionTemplate;
using v8::Handle;
using v8::HandleScope;
using v8::Integer;
using v8::Local;
using v8::Object;
using v8::Persistent;
using v8::String;
using v8::Value;
Persistent<Function> Channel::constructor;
Persistent<FunctionTemplate> Channel::fun_tpl;
Channel::Channel(grpc_channel *channel, NanUtf8String *host)
: wrapped_channel(channel), host(host) {
}
Channel::~Channel() {
if (wrapped_channel != NULL) {
grpc_channel_destroy(wrapped_channel);
}
delete host;
}
void Channel::Init(Handle<Object> exports) {
NanScope();
Local<FunctionTemplate> tpl = FunctionTemplate::New(New);
tpl->SetClassName(NanNew("Channel"));
tpl->InstanceTemplate()->SetInternalFieldCount(1);
NanSetPrototypeTemplate(tpl, "close",
FunctionTemplate::New(Close)->GetFunction());
NanAssignPersistent(fun_tpl, tpl);
NanAssignPersistent(constructor, tpl->GetFunction());
exports->Set(NanNew("Channel"), constructor);
}
bool Channel::HasInstance(Handle<Value> val) {
NanScope();
return NanHasInstance(fun_tpl, val);
}
grpc_channel *Channel::GetWrappedChannel() {
return this->wrapped_channel;
}
char *Channel::GetHost() {
return **this->host;
}
NAN_METHOD(Channel::New) {
NanScope();
if (args.IsConstructCall()) {
if (!args[0]->IsString()) {
return NanThrowTypeError("Channel expects a string and an object");
}
grpc_channel *wrapped_channel;
// Owned by the Channel object
NanUtf8String *host = new NanUtf8String(args[0]);
if (args[1]->IsUndefined()) {
wrapped_channel = grpc_channel_create(**host, NULL);
} else if (args[1]->IsObject()) {
grpc_credentials *creds = NULL;
Handle<Object> args_hash(args[1]->ToObject()->Clone());
if (args_hash->HasOwnProperty(NanNew("credentials"))) {
Handle<Value> creds_value = args_hash->Get(NanNew("credentials"));
if (!Credentials::HasInstance(creds_value)) {
return NanThrowTypeError(
"credentials arg must be a Credentials object");
}
Credentials *creds_object = ObjectWrap::Unwrap<Credentials>(
creds_value->ToObject());
creds = creds_object->GetWrappedCredentials();
args_hash->Delete(NanNew("credentials"));
}
Handle<Array> keys(args_hash->GetOwnPropertyNames());
grpc_channel_args channel_args;
channel_args.num_args = keys->Length();
channel_args.args = reinterpret_cast<grpc_arg*>(
calloc(channel_args.num_args, sizeof(grpc_arg)));
/* These are used to keep all strings until then end of the block, then
destroy them */
std::vector<NanUtf8String*> key_strings(keys->Length());
std::vector<NanUtf8String*> value_strings(keys->Length());
for (unsigned int i = 0; i < channel_args.num_args; i++) {
Handle<String> current_key(keys->Get(i)->ToString());
Handle<Value> current_value(args_hash->Get(current_key));
key_strings[i] = new NanUtf8String(current_key);
channel_args.args[i].key = **key_strings[i];
if (current_value->IsInt32()) {
channel_args.args[i].type = GRPC_ARG_INTEGER;
channel_args.args[i].value.integer = current_value->Int32Value();
} else if (current_value->IsString()) {
channel_args.args[i].type = GRPC_ARG_STRING;
value_strings[i] = new NanUtf8String(current_value);
channel_args.args[i].value.string = **value_strings[i];
} else {
free(channel_args.args);
return NanThrowTypeError("Arg values must be strings");
}
}
if (creds == NULL) {
wrapped_channel = grpc_channel_create(**host, &channel_args);
} else {
wrapped_channel = grpc_secure_channel_create(creds,
**host,
&channel_args);
}
free(channel_args.args);
} else {
return NanThrowTypeError("Channel expects a string and an object");
}
Channel *channel = new Channel(wrapped_channel, host);
channel->Wrap(args.This());
NanReturnValue(args.This());
} else {
const int argc = 2;
Local<Value> argv[argc] = { args[0], args[1] };
NanReturnValue(constructor->NewInstance(argc, argv));
}
}
NAN_METHOD(Channel::Close) {
NanScope();
if (!HasInstance(args.This())) {
return NanThrowTypeError("close can only be called on Channel objects");
}
Channel *channel = ObjectWrap::Unwrap<Channel>(args.This());
if (channel->wrapped_channel != NULL) {
grpc_channel_destroy(channel->wrapped_channel);
channel->wrapped_channel = NULL;
}
NanReturnUndefined();
}
} // namespace node
} // namespace grpc
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