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#include <Formats/FormatSchemaInfo.h>
#include <Interpreters/Context.h>
#include <Common/Exception.h>
#include <Common/filesystemHelpers.h>
#include <Disks/IO/WriteBufferFromTemporaryFile.h>
#include <filesystem>
namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
namespace fs = std::filesystem;
namespace
{
String getFormatSchemaDefaultFileExtension(const String & format)
{
if (format == "Protobuf")
return "proto";
else if (format == "CapnProto")
return "capnp";
else
return "";
}
}
FormatSchemaInfo::FormatSchemaInfo(const String & format_schema, const String & format, bool require_message, bool is_server, const std::string & format_schema_path)
{
if (format_schema.empty())
throw Exception(ErrorCodes::BAD_ARGUMENTS, "The format {} requires a schema. The corresponding setting should be set", format);
String default_file_extension = getFormatSchemaDefaultFileExtension(format);
fs::path path;
if (require_message)
{
size_t colon_pos = format_schema.find(':');
if ((colon_pos == String::npos) || (colon_pos == 0) || (colon_pos == format_schema.length() - 1))
{
throw Exception(ErrorCodes::BAD_ARGUMENTS,
"Format schema requires the 'format_schema' setting to have the 'schema_file:message_name' format{}. Got '{}'",
(default_file_extension.empty() ? "" : ", e.g. 'schema." + default_file_extension + ":Message'"), format_schema);
}
else
{
path = fs::path(format_schema.substr(0, colon_pos));
String filename = path.has_filename() ? path.filename() : path.parent_path().filename();
if (filename.empty())
throw Exception(ErrorCodes::BAD_ARGUMENTS,
"Format schema requires the 'format_schema' setting to have the 'schema_file:message_name' format{}. Got '{}'",
(default_file_extension.empty() ? "" : ", e.g. 'schema." + default_file_extension + ":Message'"), format_schema);
}
message_name = format_schema.substr(colon_pos + 1);
}
else
{
path = fs::path(format_schema);
if (!path.has_filename())
path = path.parent_path() / "";
}
auto default_schema_directory = [&format_schema_path]()
{
static const String str = fs::canonical(format_schema_path) / "";
return str;
};
if (!path.has_extension() && !default_file_extension.empty())
path = path.parent_path() / (path.stem().string() + '.' + default_file_extension);
fs::path default_schema_directory_path(default_schema_directory());
if (path.is_absolute())
{
if (is_server)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Absolute path in the 'format_schema' setting is prohibited: {}", path.string());
schema_path = path.filename();
schema_directory = path.parent_path() / "";
}
else if (path.has_parent_path() && !fs::weakly_canonical(default_schema_directory_path / path).string().starts_with(fs::weakly_canonical(default_schema_directory_path).string()))
{
if (is_server)
throw Exception(
ErrorCodes::BAD_ARGUMENTS,
"Path in the 'format_schema' setting shouldn't go outside the 'format_schema_path' directory: {} ({} not in {})",
default_schema_directory(),
path.string(),
default_schema_directory());
path = default_schema_directory_path / path;
schema_path = path.filename();
schema_directory = path.parent_path() / "";
}
else
{
schema_path = path;
schema_directory = default_schema_directory();
}
}
FormatSchemaInfo::FormatSchemaInfo(const FormatSettings & settings, const String & format, bool require_message)
: FormatSchemaInfo(
settings.schema.format_schema, format, require_message, settings.schema.is_server, settings.schema.format_schema_path)
{
}
template <typename SchemaGenerator>
MaybeAutogeneratedFormatSchemaInfo<SchemaGenerator>::MaybeAutogeneratedFormatSchemaInfo(
const FormatSettings & settings, const String & format, const Block & header, bool use_autogenerated_schema)
{
if (!use_autogenerated_schema || !settings.schema.format_schema.empty())
{
schema_info = std::make_unique<FormatSchemaInfo>(settings, format, true);
return;
}
String schema_path;
fs::path default_schema_directory_path(fs::canonical(settings.schema.format_schema_path) / "");
fs::path path;
if (!settings.schema.output_format_schema.empty())
{
schema_path = settings.schema.output_format_schema;
path = schema_path;
if (path.is_absolute())
{
if (settings.schema.is_server)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Absolute path in the 'output_format_schema' setting is prohibited: {}", path.string());
}
else if (path.has_parent_path() && !fs::weakly_canonical(default_schema_directory_path / path).string().starts_with(fs::weakly_canonical(default_schema_directory_path).string()))
{
if (settings.schema.is_server)
throw Exception(
ErrorCodes::BAD_ARGUMENTS,
"Path in the 'format_schema' setting shouldn't go outside the 'format_schema_path' directory: {} ({} not in {})",
default_schema_directory_path.string(),
path.string(),
default_schema_directory_path.string());
path = default_schema_directory_path / path;
}
else
{
path = default_schema_directory_path / path;
}
}
else
{
if (settings.schema.is_server)
{
tmp_file_path = PocoTemporaryFile::tempName(default_schema_directory_path.string()) + '.' + getFormatSchemaDefaultFileExtension(format);
schema_path = fs::path(tmp_file_path).filename();
}
else
{
tmp_file_path = PocoTemporaryFile::tempName() + '.' + getFormatSchemaDefaultFileExtension(format);
schema_path = tmp_file_path;
}
path = tmp_file_path;
}
WriteBufferFromFile buf(path.string());
SchemaGenerator::writeSchema(buf, "Message", header.getNamesAndTypesList());
buf.finalize();
schema_info = std::make_unique<FormatSchemaInfo>(schema_path + ":Message", format, true, settings.schema.is_server, settings.schema.format_schema_path);
}
template <typename SchemaGenerator>
MaybeAutogeneratedFormatSchemaInfo<SchemaGenerator>::~MaybeAutogeneratedFormatSchemaInfo()
{
if (!tmp_file_path.empty())
{
try
{
fs::remove(tmp_file_path);
}
catch (...)
{
tryLogCurrentException("MaybeAutogeneratedFormatSchemaInfo", "Cannot delete temporary schema file");
}
}
}
template class MaybeAutogeneratedFormatSchemaInfo<StructureToCapnProtoSchema>;
template class MaybeAutogeneratedFormatSchemaInfo<StructureToProtobufSchema>;
}
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