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arangodb/V8/v8-shell.cpp

584 lines
17 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// @brief V8 shell functions
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2011-2010, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "v8-shell.h"
#define TRI_WITHIN_C
#include <Basics/csv.h>
#include <Basics/logging.h>
#include <Basics/string-buffer.h>
#include <Basics/strings.h>
#undef TRI_WITHIN_C
#include <fstream>
#include "V8/v8-json.h"
using namespace std;
// -----------------------------------------------------------------------------
// --SECTION-- private functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup V8Shell V8 Shell
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief begins a new CSV line
////////////////////////////////////////////////////////////////////////////////
static void ProcessCsvBegin (TRI_csv_parser_t* parser, size_t row) {
v8::Handle<v8::Array>* array = reinterpret_cast<v8::Handle<v8::Array>*>(parser->_dataBegin);
(*array) = v8::Array::New();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief adds a new CSV field
////////////////////////////////////////////////////////////////////////////////
static void ProcessCsvAdd (TRI_csv_parser_t* parser, char const* field, size_t row, size_t column) {
v8::Handle<v8::Array>* array = reinterpret_cast<v8::Handle<v8::Array>*>(parser->_dataBegin);
(*array)->Set(column, v8::String::New(field));
}
////////////////////////////////////////////////////////////////////////////////
/// @brief ends a CSV line
////////////////////////////////////////////////////////////////////////////////
static void ProcessCsvEnd (TRI_csv_parser_t* parser, char const* field, size_t row, size_t column) {
v8::Handle<v8::Array>* array = reinterpret_cast<v8::Handle<v8::Array>*>(parser->_dataBegin);
(*array)->Set(column, v8::String::New(field));
v8::Handle<v8::Function>* cb = reinterpret_cast<v8::Handle<v8::Function>*>(parser->_dataEnd);
v8::Handle<v8::Number> r = v8::Number::New(row);
v8::Handle<v8::Value> args[] = { *array, r };
(*cb)->Call(*cb, 2, args);
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- JS functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup V8Shell V8 Shell
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief changes the log-level
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> LogLevelCall (v8::Arguments const& argv) {
v8::HandleScope scope;
if (1 <= argv.Length()) {
v8::String::Utf8Value str(argv[0]);
TRI_SetLogLevelLogging(*str);
}
return scope.Close(v8::String::New(TRI_GetLogLevelLogging()));
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts JSON string to object
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> FromJsonCall (v8::Arguments const& argv) {
v8::HandleScope scope;
if (argv.Length() != 1) {
return scope.Close(v8::ThrowException(v8::String::New("usage: fromJson(<string>)")));
}
v8::String::Utf8Value str(argv[0]);
if (*str == 0) {
return scope.Close(v8::ThrowException(v8::String::New("cannot get UTF-8 representation of <string>")));
}
char* error;
v8::Handle<v8::Value> object = TRI_FromJsonString(*str, &error);
if (object->IsUndefined()) {
v8::Handle<v8::String> msg = v8::String::New(error);
TRI_FreeString(error);
return scope.Close(v8::ThrowException(msg));
}
return scope.Close(object);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief outputs the arguments
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> OutputCall (v8::Arguments const& argv) {
for (int i = 0; i < argv.Length(); i++) {
v8::HandleScope scope;
// extract the next argument
v8::Handle<v8::Value> val = argv[i];
// convert it into a string
v8::String::Utf8Value utf8(val);
if (*utf8 == 0) {
continue;
}
// print the argument
char const* ptr = *utf8;
size_t len = utf8.length();
while (0 < len) {
ssize_t n = write(1, ptr, len);
if (n < 0) {
return v8::Undefined();
}
len -= n;
ptr += n;
}
}
return v8::Undefined();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief prints the arguments
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> PrintCall (v8::Arguments const& argv) {
v8::Handle<v8::Function> toJson = v8::Handle<v8::Function>::Cast(
argv.Holder()->CreationContext()->Global()->Get(v8::String::New("toJson")));
for (int i = 0; i < argv.Length(); i++) {
v8::HandleScope scope;
TRI_string_buffer_t buffer;
TRI_InitStringBuffer(&buffer);
// extract the next argument
v8::Handle<v8::Value> val = argv[i];
// convert the object into json - if possible
if (val->IsObject()) {
v8::Handle<v8::Object> obj = val->ToObject();
v8::Handle<v8::String> printFuncName = v8::String::New("print");
if (obj->Has(printFuncName)) {
v8::Handle<v8::Function> print = v8::Handle<v8::Function>::Cast(obj->Get(printFuncName));
v8::Handle<v8::Value> args[] = { val };
print->Call(obj, 1, args);
continue;
}
v8::Handle<v8::Value> args[] = { val };
v8::Handle<v8::Value> cnv = toJson->Call(toJson, 1, args);
v8::String::Utf8Value utf8(cnv);
if (*utf8 == 0) {
TRI_AppendStringStringBuffer(&buffer, "[object]");
}
else {
TRI_AppendString2StringBuffer(&buffer, *utf8, utf8.length());
}
}
else if (val->IsString()) {
v8::String::Utf8Value utf8(val->ToString());
if (*utf8 == 0) {
TRI_AppendStringStringBuffer(&buffer, "[string]");
}
else {
TRI_AppendCharStringBuffer(&buffer, '"');
TRI_AppendString2StringBuffer(&buffer, *utf8, utf8.length());
TRI_AppendCharStringBuffer(&buffer, '"');
}
}
else {
v8::String::Utf8Value utf8(val);
if (*utf8 == 0) {
TRI_AppendStringStringBuffer(&buffer, "[value]");
}
else {
TRI_AppendString2StringBuffer(&buffer, *utf8, utf8.length());
}
}
// print the argument
char const* ptr = TRI_BeginStringBuffer(&buffer);
size_t len = TRI_LengthStringBuffer(&buffer);
while (0 < len) {
ssize_t n = write(1, ptr, len);
if (n < 0) {
TRI_DestroyStringBuffer(&buffer);
return v8::Undefined();
}
len -= n;
ptr += n;
}
// print a new line
ssize_t n = write(1, "\n", 1);
if (n < 0) {
TRI_DestroyStringBuffer(&buffer);
return v8::Undefined();
}
TRI_DestroyStringBuffer(&buffer);
}
return v8::Undefined();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief processes a csv file
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> ProcessCsvFileCall (v8::Arguments const& argv) {
v8::HandleScope scope;
if (argv.Length() < 2) {
return scope.Close(v8::ThrowException(v8::String::New("usage: processCsvFile(<filename>, <callback>[, <options>])")));
}
// extract the filename
v8::String::Utf8Value filename(argv[0]);
if (*filename == 0) {
return scope.Close(v8::ThrowException(v8::String::New("<filename> must be an UTF8 filename")));
}
// extract the callback
v8::Handle<v8::Function> cb = v8::Handle<v8::Function>::Cast(argv[1]);
// extract the options
v8::Handle<v8::String> separatorKey = v8::String::New("separator");
v8::Handle<v8::String> quoteKey = v8::String::New("quote");
char separator = ',';
char quote = '"';
if (3 <= argv.Length()) {
v8::Handle<v8::Object> options = argv[2]->ToObject();
bool error;
// separator
if (options->Has(separatorKey)) {
separator = ObjectToCharacter(options->Get(separatorKey), error);
if (error) {
return scope.Close(v8::ThrowException(v8::String::New("<options>.separator must be a character")));
}
}
// quote
if (options->Has(quoteKey)) {
quote = ObjectToCharacter(options->Get(quoteKey), error);
if (error) {
return scope.Close(v8::ThrowException(v8::String::New("<options>.quote must be a character")));
}
}
}
// read and convert
int fd = open(*filename, O_RDONLY);
if (fd < 0) {
return scope.Close(v8::ThrowException(v8::String::New(TRI_LAST_ERROR_STR)));
}
TRI_csv_parser_t parser;
TRI_InitCsvParser(&parser,
ProcessCsvBegin,
ProcessCsvAdd,
ProcessCsvEnd);
parser._separator = separator;
parser._quote = quote;
parser._dataEnd = &cb;
v8::Handle<v8::Array> array;
parser._dataBegin = &array;
char buffer[10240];
while (true) {
v8::HandleScope scope;
ssize_t n = read(fd, buffer, sizeof(buffer));
if (n < 0) {
TRI_DestroyCsvParser(&parser);
return scope.Close(v8::ThrowException(v8::String::New(TRI_LAST_ERROR_STR)));
}
else if (n == 0) {
TRI_DestroyCsvParser(&parser);
break;
}
TRI_ParseCsvString2(&parser, buffer, n);
}
return scope.Close(v8::Undefined());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief processes a JSON file
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> ProcessJsonFileCall (v8::Arguments const& argv) {
v8::HandleScope scope;
if (argv.Length() < 2) {
return scope.Close(v8::ThrowException(v8::String::New("usage: processJsonFile(<filename>, <callback>)")));
}
// extract the filename
v8::String::Utf8Value filename(argv[0]);
if (*filename == 0) {
return scope.Close(v8::ThrowException(v8::String::New("<filename> must be an UTF8 filename")));
}
// extract the callback
v8::Handle<v8::Function> cb = v8::Handle<v8::Function>::Cast(argv[1]);
// read and convert
string line;
ifstream file(*filename);
if (file.is_open()) {
size_t row = 0;
while (file.good()) {
v8::HandleScope scope;
getline(file, line);
char const* ptr = line.c_str();
char const* end = ptr + line.length();
while (ptr < end && (*ptr == ' ' || *ptr == '\t' || *ptr == '\r')) {
++ptr;
}
if (ptr == end) {
continue;
}
char* error;
v8::Handle<v8::Value> object = TRI_FromJsonString(line.c_str(), &error);
if (object->IsUndefined()) {
v8::Handle<v8::String> msg = v8::String::New(error);
TRI_FreeString(error);
return scope.Close(v8::ThrowException(msg));
}
v8::Handle<v8::Number> r = v8::Number::New(row);
v8::Handle<v8::Value> args[] = { object, r };
cb->Call(cb, 2, args);
row++;
}
file.close();
}
else {
return scope.Close(v8::ThrowException(v8::String::New("cannot open file")));
}
return scope.Close(v8::Undefined());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief returns the current time
////////////////////////////////////////////////////////////////////////////////
static v8::Handle<v8::Value> TimeCall (v8::Arguments const& argv) {
v8::HandleScope scope;
return scope.Close(v8::Number::New(TRI_microtime()));
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup V8Shell V8 Shell
/// @{
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an object to a string
////////////////////////////////////////////////////////////////////////////////
string ObjectToString (v8::Handle<v8::Value> value) {
v8::String::Utf8Value utf8Value(value);
if (*utf8Value == 0) {
return "";
}
else {
return string(*utf8Value, utf8Value.length());
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an object to a character
////////////////////////////////////////////////////////////////////////////////
char ObjectToCharacter (v8::Handle<v8::Value> value, bool& error) {
error = false;
if (! value->IsString() && ! value->IsStringObject()) {
error = true;
return '\0';
}
v8::String::Utf8Value sep(value->ToString());
if (*sep == 0 || sep.length() != 1) {
error = true;
return '\0';
}
return (*sep)[0];
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an object to a double
////////////////////////////////////////////////////////////////////////////////
double ObjectToDouble (v8::Handle<v8::Value> value) {
if (value->IsNumber()) {
return value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return no->NumberValue();
}
return 0.0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief converts an object to a double
////////////////////////////////////////////////////////////////////////////////
double ObjectToDouble (v8::Handle<v8::Value> value, bool& error) {
error = false;
if (value->IsNumber()) {
return value->ToNumber()->Value();
}
if (value->IsNumberObject()) {
v8::Handle<v8::NumberObject> no = v8::Handle<v8::NumberObject>::Cast(value);
return no->NumberValue();
}
error = true;
return 0.0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief stores the V8 shell functions inside the global variable
////////////////////////////////////////////////////////////////////////////////
void InitV8Shell (v8::Handle<v8::ObjectTemplate> global) {
// create the global functions
global->Set(v8::String::New("logLevel"),
v8::FunctionTemplate::New(LogLevelCall),
v8::ReadOnly);
global->Set(v8::String::New("output"),
v8::FunctionTemplate::New(OutputCall),
v8::ReadOnly);
global->Set(v8::String::New("print"),
v8::FunctionTemplate::New(PrintCall),
v8::ReadOnly);
global->Set(v8::String::New("processCsvFile"),
v8::FunctionTemplate::New(ProcessCsvFileCall),
v8::ReadOnly);
global->Set(v8::String::New("processJsonFile"),
v8::FunctionTemplate::New(ProcessJsonFileCall),
v8::ReadOnly);
global->Set(v8::String::New("fromJson"),
v8::FunctionTemplate::New(FromJsonCall),
v8::ReadOnly);
global->Set(v8::String::New("time"),
v8::FunctionTemplate::New(TimeCall),
v8::ReadOnly);
}
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
// Local Variables:
// mode: outline-minor
// outline-regexp: "^\\(/// @brief\\|/// @addtogroup\\|// --SECTION--\\)"
// End: