node/node.cc

#include "node.h"

#include "node_tcp.h"
#include "node_http.h"
#include "node_timer.h"

#include <stdio.h>
#include <assert.h>

#include <string>
#include <list>
#include <map>

using namespace v8;
using namespace std;

static int exit_code = 0;

void
node_fatal_exception (TryCatch &try_catch)
{
  HandleScope handle_scope;

  Local<Message> message = try_catch.Message();
  String::Utf8Value error(try_catch.Exception());

  fprintf( stderr
         , "Uncaught Exception. line %d '%s'\n\n"
         , try_catch.Message()->GetLineNumber() 
         , *error
         );

  ev_unloop(node_loop(), EVUNLOOP_ALL);
  exit_code = 1;
}

// Reads a file into a v8 string.
static Handle<String>
ReadFile (const string& name) 
{
  FILE* file = fopen(name.c_str(), "rb");
  if (file == NULL) return Handle<String>();

  fseek(file, 0, SEEK_END);
  int size = ftell(file);
  rewind(file);

  char* chars = new char[size + 1];
  chars[size] = '\0';
  for (int i = 0; i < size;) {
    int read = fread(&chars[i], 1, size - i, file);
    i += read;
  }
  fclose(file);
  Handle<String> result = String::New(chars, size);
  delete[] chars;
  return result;
}

static void
ParseOptions (int argc, char* argv[], map<string, string>& options, string* file)
{
  for (int i = 1; i < argc; i++) {
    string arg = argv[i];
    int index = arg.find('=', 0);
    if (index == string::npos) {
      *file = arg;
    } else {
      string key = arg.substr(0, index);
      string value = arg.substr(index+1);
      options[key] = value;
    }
  }
}

static bool
compile (Handle<String> script) 
{
  HandleScope handle_scope;

  // We're just about to compile the script; set up an error handler to
  // catch any exceptions the script might throw.
  TryCatch try_catch;

  // Compile the script and check for errors.
  Handle<Script> compiled_script = Script::Compile(script);
  if (compiled_script.IsEmpty()) {

    Handle<Message> message = try_catch.Message();

    String::Utf8Value error(try_catch.Exception());

    printf("error: %s line %d\n", *error, message->GetLineNumber());

    return false;
  }

  // Run the script!
  Handle<Value> result = compiled_script->Run();
  if (result.IsEmpty()) {
    // The TryCatch above is still in effect and will have caught the error.
    String::Utf8Value error(try_catch.Exception());
    printf("error: %s\n", *error);
    // Running the script failed; bail out.
    return false;
  }
  return true;
}

static Handle<Value>
LogCallback (const Arguments& args) 
{
  if (args.Length() < 1) return v8::Undefined();
  HandleScope scope;
  Handle<Value> arg = args[0];
  String::Utf8Value value(arg);

  printf("%s\n", *value);
  fflush(stdout);

  return Undefined();
}


static Handle<Value>
BlockingFileReadCallback (const Arguments& args)
{
  if (args.Length() < 1) return v8::Undefined();
  HandleScope scope;

  String::Utf8Value filename(args[0]);

  Handle<String> output = ReadFile (*filename);
  return scope.Close(output);
}

static void
OnFatalError (const char* location, const char* message)
{
  fprintf(stderr, "Fatal error. %s %s\n", location, message);
  ev_unloop(node_loop(), EVUNLOOP_ALL);
}

int
main (int argc, char *argv[]) 
{
  V8::SetFlagsFromCommandLine(&argc, argv, true);

  map<string, string> options;
  string file;
  ParseOptions(argc, argv, options, &file);
  if (file.empty()) {
    fprintf(stderr, "No script was specified.\n");
    return 1;
  }
  HandleScope scope;
  Handle<String> source = ReadFile(file);
  if (source.IsEmpty()) {
    fprintf(stderr, "Error reading '%s'.\n", file.c_str());
    return 1;
  }

  Persistent<Context> context = Context::New(NULL, ObjectTemplate::New());
  Context::Scope context_scope(context);

  Local<Object> g = Context::GetCurrent()->Global();

  g->Set ( String::New("log")
         , FunctionTemplate::New(LogCallback)->GetFunction()
         );

  g->Set ( String::New("blockingFileRead")
         , FunctionTemplate::New(BlockingFileReadCallback)->GetFunction()
         );

  Init_timer(g);
  Init_tcp(g);
  Init_http(g);

  V8::SetFatalErrorHandler(OnFatalError);

  // Compile and run the script
  if (!compile(source))
    return 1;

  ev_loop(node_loop(), 0);

  context.Dispose();

  return exit_code;
}