void BSONElement::jsonStringStream(JsonStringFormat format,
bool includeFieldNames,
int pretty,
std::stringstream& s) const {
if (includeFieldNames)
s << '"' << escape(fieldName()) << "\" : ";
switch (type()) {
case mongo::String:
case Symbol:
s << '"' << escape(string(valuestr(), valuestrsize() - 1)) << '"';
break;
case NumberLong:
if (format == TenGen) {
s << "NumberLong(" << _numberLong() << ")";
} else {
s << "{ \"$numberLong\" : \"" << _numberLong() << "\" }";
}
break;
case NumberInt:
if (format == TenGen) {
s << "NumberInt(" << _numberInt() << ")";
break;
}
case NumberDouble:
if (number() >= -std::numeric_limits<double>::max() &&
number() <= std::numeric_limits<double>::max()) {
auto origPrecision = s.precision();
auto guard = MakeGuard([&s, origPrecision]() { s.precision(origPrecision); });
s.precision(16);
s << number();
}
// This is not valid JSON, but according to RFC-4627, "Numeric values that cannot be
// represented as sequences of digits (such as Infinity and NaN) are not permitted." so
// we are accepting the fact that if we have such values we cannot output valid JSON.
else if (std::isnan(number())) {
s << "NaN";
} else if (std::isinf(number())) {
s << (number() > 0 ? "Infinity" : "-Infinity");
} else {
StringBuilder ss;
ss << "Number " << number() << " cannot be represented in JSON";
string message = ss.str();
massert(10311, message.c_str(), false);
}
break;
case NumberDecimal:
if (format == TenGen)
s << "NumberDecimal(\"";
else
s << "{ \"$numberDecimal\" : \"";
// Recognize again that this is not valid JSON according to RFC-4627.
// Also, treat -NaN and +NaN as the same thing for MongoDB.
if (numberDecimal().isNaN()) {
s << "NaN";
} else if (numberDecimal().isInfinite()) {
s << (numberDecimal().isNegative() ? "-Infinity" : "Infinity");
} else {
s << numberDecimal().toString();
}
if (format == TenGen)
s << "\")";
else
s << "\" }";
break;
case mongo::Bool:
s << (boolean() ? "true" : "false");
break;
case jstNULL:
s << "null";
break;
case Undefined:
if (format == Strict) {
s << "{ \"$undefined\" : true }";
} else {
s << "undefined";
}
break;
case Object:
embeddedObject().jsonStringStream(format, pretty, false, s);
break;
case mongo::Array: {
if (embeddedObject().isEmpty()) {
s << "[]";
break;
}
s << "[ ";
BSONObjIterator i(embeddedObject());
BSONElement e = i.next();
if (!e.eoo()) {
int count = 0;
while (1) {
if (pretty) {
s << '\n';
for (int x = 0; x < pretty; x++)
s << " ";
}
if (strtol(e.fieldName(), 0, 10) > count) {
s << "undefined";
} else {
e.jsonStringStream(format, false, pretty ? pretty + 1 : 0, s);
e = i.next();
}
count++;
if (e.eoo())
break;
s << ", ";
}
}
s << " ]";
break;
}
case DBRef: {
if (format == TenGen)
s << "Dbref( ";
else
s << "{ \"$ref\" : ";
s << '"' << valuestr() << "\", ";
if (format != TenGen)
s << "\"$id\" : ";
s << '"' << mongo::OID::from(valuestr() + valuestrsize()) << "\" ";
if (format == TenGen)
s << ')';
else
s << '}';
break;
}
case jstOID:
if (format == TenGen) {
s << "ObjectId( ";
} else {
s << "{ \"$oid\" : ";
}
s << '"' << __oid() << '"';
if (format == TenGen) {
s << " )";
} else {
s << " }";
}
break;
case BinData: {
ConstDataCursor reader(value());
const int len = reader.readAndAdvance<LittleEndian<int>>();
BinDataType type = static_cast<BinDataType>(reader.readAndAdvance<uint8_t>());
s << "{ \"$binary\" : \"";
base64::encode(s, reader.view(), len);
auto origFill = s.fill();
auto origFmtF = s.flags();
auto origWidth = s.width();
auto guard = MakeGuard([&s, origFill, origFmtF, origWidth] {
s.fill(origFill);
s.setf(origFmtF);
s.width(origWidth);
});
s.setf(std::ios_base::hex, std::ios_base::basefield);
s << "\", \"$type\" : \"";
s.width(2);
s.fill('0');
s << type;
s << "\" }";
break;
}
case mongo::Date:
if (format == Strict) {
Date_t d = date();
s << "{ \"$date\" : ";
// The two cases in which we cannot convert Date_t::millis to an ISO Date string are
// when the date is too large to format (SERVER-13760), and when the date is before
// the epoch (SERVER-11273). Since Date_t internally stores millis as an unsigned
// long long, despite the fact that it is logically signed (SERVER-8573), this check
// handles both the case where Date_t::millis is too large, and the case where
// Date_t::millis is negative (before the epoch).
if (d.isFormattable()) {
s << "\"" << dateToISOStringLocal(date()) << "\"";
} else {
s << "{ \"$numberLong\" : \"" << d.toMillisSinceEpoch() << "\" }";
}
s << " }";
} else {
s << "Date( ";
if (pretty) {
Date_t d = date();
// The two cases in which we cannot convert Date_t::millis to an ISO Date string
// are when the date is too large to format (SERVER-13760), and when the date is
// before the epoch (SERVER-11273). Since Date_t internally stores millis as an
// unsigned long long, despite the fact that it is logically signed
// (SERVER-8573), this check handles both the case where Date_t::millis is too
// large, and the case where Date_t::millis is negative (before the epoch).
if (d.isFormattable()) {
s << "\"" << dateToISOStringLocal(date()) << "\"";
} else {
// FIXME: This is not parseable by the shell, since it may not fit in a
// float
s << d.toMillisSinceEpoch();
}
} else {
s << date().asInt64();
}
s << " )";
}
break;
case RegEx:
if (format == Strict) {
s << "{ \"$regex\" : \"" << escape(regex());
s << "\", \"$options\" : \"" << regexFlags() << "\" }";
} else {
s << "/" << escape(regex(), true) << "/";
// FIXME Worry about alpha order?
for (const char* f = regexFlags(); *f; ++f) {
switch (*f) {
case 'g':
case 'i':
case 'm':
s << *f;
default:
break;
}
}
}
break;
case CodeWScope: {
BSONObj scope = codeWScopeObject();
if (!scope.isEmpty()) {
s << "{ \"$code\" : \"" << escape(_asCode()) << "\" , "
<< "\"$scope\" : " << scope.jsonString() << " }";
break;
}
}
case Code:
s << "\"" << escape(_asCode()) << "\"";
break;
case bsonTimestamp:
if (format == TenGen) {
s << "Timestamp( " << durationCount<Seconds>(timestampTime().toDurationSinceEpoch())
<< ", " << timestampInc() << " )";
} else {
s << "{ \"$timestamp\" : { \"t\" : "
<< durationCount<Seconds>(timestampTime().toDurationSinceEpoch())
<< ", \"i\" : " << timestampInc() << " } }";
}
break;
case MinKey:
s << "{ \"$minKey\" : 1 }";
break;
case MaxKey:
s << "{ \"$maxKey\" : 1 }";
break;
default:
StringBuilder ss;
ss << "Cannot create a properly formatted JSON string with "
<< "element: " << toString() << " of type: " << type();
string message = ss.str();
massert(10312, message.c_str(), false);
}
}
