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#include <node.h>
#include <node_script.h>
#include <assert.h>
#include <v8-debug.h>
using namespace v8;
using namespace node;
Persistent<FunctionTemplate> node::Script::constructor_template;
void
node::Script::Initialize (Handle<Object> target)
{
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(node::Script::New);
constructor_template = Persistent<FunctionTemplate>::New(t);
constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
constructor_template->SetClassName(String::NewSymbol("Script"));
NODE_SET_PROTOTYPE_METHOD(constructor_template, "runInThisContext", node::Script::RunInThisContext);
NODE_SET_PROTOTYPE_METHOD(constructor_template, "runInNewContext", node::Script::RunInNewContext);
NODE_SET_METHOD(constructor_template, "runInThisContext", node::Script::CompileRunInThisContext);
NODE_SET_METHOD(constructor_template, "runInNewContext", node::Script::CompileRunInNewContext);
target->Set(String::NewSymbol("Script"), constructor_template->GetFunction());
}
Handle<Value>
node::Script::New (const Arguments& args)
{
HandleScope scope;
node::Script *t = new node::Script();
t->Wrap(args.Holder());
return
node::Script::EvalMachine<compileCode, thisContext, wrapExternal>(args);
}
node::Script::~Script() {
_script.Dispose();
}
Handle<Value>
node::Script::RunInThisContext (const Arguments& args)
{
return
node::Script::EvalMachine<unwrapExternal, thisContext, returnResult>(args);
}
Handle<Value>
node::Script::RunInNewContext(const Arguments& args) {
return
node::Script::EvalMachine<unwrapExternal, newContext, returnResult>(args);
}
Handle<Value>
node::Script::CompileRunInThisContext (const Arguments& args)
{
return
node::Script::EvalMachine<compileCode, thisContext, returnResult>(args);
}
Handle<Value>
node::Script::CompileRunInNewContext(const Arguments& args) {
return
node::Script::EvalMachine<compileCode, newContext, returnResult>(args);
}
// Extracts a C str from a V8 Utf8Value.
const char* ToCString(const v8::String::Utf8Value& value) {
return *value ? *value : "<str conversion failed>";
}
static void ReportException(TryCatch &try_catch, bool show_line = false, bool show_rest = true) {
Handle<Message> message = try_catch.Message();
Handle<Value> error = try_catch.Exception();
Handle<String> stack;
if (error->IsObject()) {
Handle<Object> obj = Handle<Object>::Cast(error);
Handle<Value> raw_stack = obj->Get(String::New("stack"));
if (raw_stack->IsString()) stack = Handle<String>::Cast(raw_stack);
}
if (show_line && !message.IsEmpty()) {
// Print (filename):(line number): (message).
String::Utf8Value filename(message->GetScriptResourceName());
const char* filename_string = ToCString(filename);
int linenum = message->GetLineNumber();
fprintf(stderr, "%s:%i\n", filename_string, linenum);
// Print line of source code.
String::Utf8Value sourceline(message->GetSourceLine());
const char* sourceline_string = ToCString(sourceline);
fprintf(stderr, "%s\n", sourceline_string);
// Print wavy underline (GetUnderline is deprecated).
int start = message->GetStartColumn();
for (int i = 0; i < start; i++) {
fprintf(stderr, " ");
}
int end = message->GetEndColumn();
for (int i = start; i < end; i++) {
fprintf(stderr, "^");
}
fprintf(stderr, "\n");
}
if (show_rest) {
if (stack.IsEmpty()) {
message->PrintCurrentStackTrace(stderr);
} else {
String::Utf8Value trace(stack);
fprintf(stderr, "%s\n", *trace);
}
}
fflush(stderr);
}
template <node::Script::EvalInputFlags iFlag,
node::Script::EvalContextFlags cFlag,
node::Script::EvalOutputFlags oFlag>
Handle<Value> node::Script::EvalMachine(const Arguments& args) {
HandleScope scope;
if (iFlag == compileCode && args.Length() < 1) {
return ThrowException(Exception::TypeError(
String::New("needs at least 'code' argument.")
));
}
Local<String> code;
if (iFlag == compileCode) { code = args[0]->ToString(); }
Local<Object> sandbox;
const int sbIndex = iFlag == compileCode ? 1 : 0;
if (cFlag == newContext) {
sandbox = args.Length() > sbIndex ? args[sbIndex]->ToObject() : Object::New();
}
const int fnIndex = sbIndex + (cFlag == newContext ? 1 : 0);
Local<String> filename = args.Length() > fnIndex ? args[fnIndex]->ToString()
: String::New("evalmachine.<anonymous>");
Persistent<Context> context;
Local<Array> keys;
unsigned int i;
if (cFlag == newContext) {
// Create the new context
context = Context::New();
// Enter and compile script
context->Enter();
// Copy objects from global context, to our brand new context
keys = sandbox->GetPropertyNames();
for (i = 0; i < keys->Length(); i++) {
Handle<String> key = keys->Get(Integer::New(i))->ToString();
Handle<Value> value = sandbox->Get(key);
context->Global()->Set(key, value);
}
}
// Catch errors
TryCatch try_catch;
Handle<Value> result;
Handle<v8::Script> script;
if (iFlag == compileCode) {
// well, here node::Script::New would suffice in all cases, but maybe Compile has a little better performance where possible
script = oFlag == returnResult ? v8::Script::Compile(code, filename) : v8::Script::New(code, filename);
if (script.IsEmpty()) {
// Hack because I can't get a proper stacktrace on SyntaxError
ReportException(try_catch, true, false);
result = ThrowException(try_catch.Exception());
}
} else {
node::Script *nScript = ObjectWrap::Unwrap<node::Script>(args.Holder());
if (!nScript) {
Local<Value> exception =
Exception::Error(String::New("Must be called as a method of Script."));
result = ThrowException(exception);
} else if (nScript->_script.IsEmpty()) {
Local<Value> exception =
Exception::Error(String::New("'this' must be a result of previous new Script(code) call."));
result = ThrowException(exception);
} else {
script = nScript->_script;
}
}
if (result.IsEmpty()) {
if (oFlag == returnResult) {
result = script->Run();
} else {
node::Script *nScript = ObjectWrap::Unwrap<node::Script>(args.Holder());
if (!nScript) {
Local<Value> exception =
Exception::Error(String::New("Must be called as a method of Script."));
result = ThrowException(exception);
} else {
nScript->_script = Persistent<v8::Script>::New(script);
result = args.This();
}
}
if (result.IsEmpty()) {
result = ThrowException(try_catch.Exception());
} else if (cFlag == newContext) {
// success! copy changes back onto the sandbox object.
keys = context->Global()->GetPropertyNames();
for (i = 0; i < keys->Length(); i++) {
Handle<String> key = keys->Get(Integer::New(i))->ToString();
Handle<Value> value = context->Global()->Get(key);
sandbox->Set(key, value);
}
}
}
if (cFlag == newContext) {
// Clean up, clean up, everybody everywhere!
context->DetachGlobal();
context->Exit();
context.Dispose();
}
return result == args.This() ? result : scope.Close(result);
}
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