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#include <Functions/FunctionFactory.h>
#include <Functions/IFunction.h>
#include <Common/StringUtils/StringUtils.h>
#include <DataTypes/DataTypesNumber.h>
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnConst.h>
#include "domain.h"
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_COLUMN;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
}
template<bool conform_rfc>
struct FunctionPortImpl : public IFunction
{
bool isVariadic() const override { return true; }
size_t getNumberOfArguments() const override { return 0; }
bool useDefaultImplementationForConstants() const override { return true; }
ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
{
if (arguments.size() != 1 && arguments.size() != 2)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
"Number of arguments for function {} doesn't match: passed {}, should be 1 or 2",
getName(), arguments.size());
if (!WhichDataType(arguments[0].type).isString())
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of first argument of function {}. "
"Must be String.", arguments[0].type->getName(), getName());
if (arguments.size() == 2 && !WhichDataType(arguments[1].type).isUInt16())
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of second argument of function {}. "
"Must be UInt16.", arguments[1].type->getName(), getName());
return std::make_shared<DataTypeUInt16>();
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t) const override
{
UInt16 default_port = 0;
if (arguments.size() == 2)
{
const auto * port_column = checkAndGetColumn<ColumnConst>(arguments[1].column.get());
if (!port_column)
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Second argument for function {} must be constant UInt16", getName());
default_port = port_column->getValue<UInt16>();
}
const ColumnPtr url_column = arguments[0].column;
if (const ColumnString * url_strs = checkAndGetColumn<ColumnString>(url_column.get()))
{
auto col_res = ColumnVector<UInt16>::create();
typename ColumnVector<UInt16>::Container & vec_res = col_res->getData();
vec_res.resize(url_column->size());
vector(default_port, url_strs->getChars(), url_strs->getOffsets(), vec_res);
return col_res;
}
else
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}",
arguments[0].column->getName(), getName());
}
private:
static void vector(UInt16 default_port, const ColumnString::Chars & data, const ColumnString::Offsets & offsets, PaddedPODArray<UInt16> & res)
{
size_t size = offsets.size();
ColumnString::Offset prev_offset = 0;
for (size_t i = 0; i < size; ++i)
{
res[i] = extractPort(default_port, data, prev_offset, offsets[i] - prev_offset - 1);
prev_offset = offsets[i];
}
}
static UInt16 extractPort(UInt16 default_port, const ColumnString::Chars & buf, size_t offset, size_t size)
{
const char * p = reinterpret_cast<const char *>(buf.data()) + offset;
const char * end = p + size;
std::string_view host;
if constexpr (conform_rfc)
host = getURLHostRFC(p, size);
else
host = getURLHost(p, size);
if (host.empty())
return default_port;
if (host.size() == size)
return default_port;
p = host.data() + host.size();
if (*p++ != ':')
return default_port;
Int64 port = default_port;
while (p < end)
{
if (*p == '/')
break;
if (!isNumericASCII(*p))
return default_port;
port = (port * 10) + (*p - '0');
if (port < 0 || port > static_cast<UInt16>(-1))
return default_port;
++p;
}
return port;
}
};
struct FunctionPort : public FunctionPortImpl<false>
{
static constexpr auto name = "port";
String getName() const override { return name; }
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionPort>(); }
};
struct FunctionPortRFC : public FunctionPortImpl<true>
{
static constexpr auto name = "portRFC";
String getName() const override { return name; }
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionPortRFC>(); }
};
REGISTER_FUNCTION(Port)
{
factory.registerFunction<FunctionPort>(FunctionDocumentation
{
.description=R"(Returns the port or `default_port` if there is no port in the URL (or in case of validation error).)",
.categories{"URL"}
});
factory.registerFunction<FunctionPortRFC>(FunctionDocumentation
{
.description=R"(Similar to `port`, but conforms to RFC 3986.)",
.categories{"URL"}
});
}
}
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