mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 08:40:50 +00:00
128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
#pragma once
|
|
|
|
#include "HTTPHandlerFactory.h"
|
|
|
|
#include <re2/re2.h>
|
|
#include <re2/stringpiece.h>
|
|
#include <Poco/StringTokenizer.h>
|
|
#include <Poco/Net/HTTPServerRequest.h>
|
|
|
|
#include <common/find_symbols.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int CANNOT_COMPILE_REGEXP;
|
|
extern const int UNKNOWN_ELEMENT_IN_CONFIG;
|
|
}
|
|
|
|
|
|
typedef std::shared_ptr<const re2::RE2> CompiledRegexPtr;
|
|
|
|
static inline bool checkRegexExpression(const StringRef & match_str, const CompiledRegexPtr & compiled_regex)
|
|
{
|
|
int num_captures = compiled_regex->NumberOfCapturingGroups() + 1;
|
|
|
|
re2::StringPiece matches[num_captures];
|
|
re2::StringPiece match_input(match_str.data, match_str.size);
|
|
return compiled_regex->Match(match_input, 0, match_str.size, re2::RE2::Anchor::ANCHOR_BOTH, matches, num_captures);
|
|
}
|
|
|
|
static inline bool checkExpression(const StringRef & match_str, const std::pair<String, CompiledRegexPtr> & expression)
|
|
{
|
|
if (expression.second)
|
|
return checkRegexExpression(match_str, expression.second);
|
|
|
|
return match_str == expression.first;
|
|
}
|
|
|
|
static inline auto methodsFilter(Poco::Util::AbstractConfiguration & config, const std::string & config_path)
|
|
{
|
|
std::vector<String> methods;
|
|
Poco::StringTokenizer tokenizer(config.getString(config_path), ",");
|
|
|
|
for (auto iterator = tokenizer.begin(); iterator != tokenizer.end(); ++iterator)
|
|
methods.emplace_back(Poco::toUpper(Poco::trim(*iterator)));
|
|
|
|
return [methods](const Poco::Net::HTTPServerRequest & request) { return std::count(methods.begin(), methods.end(), request.getMethod()); };
|
|
}
|
|
|
|
static inline auto getExpression(const std::string & expression)
|
|
{
|
|
if (!startsWith(expression, "regex:"))
|
|
return std::make_pair(expression, CompiledRegexPtr{});
|
|
|
|
auto compiled_regex = std::make_shared<const re2::RE2>(expression.substr(6));
|
|
|
|
if (!compiled_regex->ok())
|
|
throw Exception("cannot compile re2: " + expression + " for http handling rule, error: " + compiled_regex->error() +
|
|
". Look at https://github.com/google/re2/wiki/Syntax for reference.", ErrorCodes::CANNOT_COMPILE_REGEXP);
|
|
return std::make_pair(expression, compiled_regex);
|
|
}
|
|
|
|
static inline auto urlFilter(Poco::Util::AbstractConfiguration & config, const std::string & config_path)
|
|
{
|
|
return [expression = getExpression(config.getString(config_path))](const Poco::Net::HTTPServerRequest & request)
|
|
{
|
|
const auto & uri = request.getURI();
|
|
const auto & end = find_first_symbols<'?'>(uri.data(), uri.data() + uri.size());
|
|
|
|
return checkExpression(StringRef(uri.data(), end - uri.data()), expression);
|
|
};
|
|
}
|
|
|
|
static inline auto headersFilter(Poco::Util::AbstractConfiguration & config, const std::string & prefix)
|
|
{
|
|
std::unordered_map<String, std::pair<String, CompiledRegexPtr>> headers_expression;
|
|
Poco::Util::AbstractConfiguration::Keys headers_name;
|
|
config.keys(prefix, headers_name);
|
|
|
|
for (const auto & header_name : headers_name)
|
|
{
|
|
const auto & expression = getExpression(config.getString(prefix + "." + header_name));
|
|
checkExpression("", expression); /// Check expression syntax is correct
|
|
headers_expression.emplace(std::make_pair(header_name, expression));
|
|
}
|
|
|
|
return [headers_expression](const Poco::Net::HTTPServerRequest & request)
|
|
{
|
|
for (const auto & [header_name, header_expression] : headers_expression)
|
|
{
|
|
const auto & header_value = request.get(header_name, "");
|
|
if (!checkExpression(StringRef(header_value.data(), header_value.size()), header_expression))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
};
|
|
}
|
|
|
|
template <typename TEndpoint>
|
|
static inline Poco::Net::HTTPRequestHandlerFactory * addFiltersFromConfig(
|
|
HandlingRuleHTTPHandlerFactory <TEndpoint> * factory, Poco::Util::AbstractConfiguration & config, const std::string & prefix)
|
|
{
|
|
Poco::Util::AbstractConfiguration::Keys filters_type;
|
|
config.keys(prefix, filters_type);
|
|
|
|
for (const auto & filter_type : filters_type)
|
|
{
|
|
if (filter_type == "handler")
|
|
continue;
|
|
else if (filter_type == "url")
|
|
factory->addFilter(urlFilter(config, prefix + ".url"));
|
|
else if (filter_type == "headers")
|
|
factory->addFilter(headersFilter(config, prefix + ".headers"));
|
|
else if (filter_type == "methods")
|
|
factory->addFilter(methodsFilter(config, prefix + ".methods"));
|
|
else
|
|
throw Exception("Unknown element in config: " + prefix + "." + filter_type, ErrorCodes::UNKNOWN_ELEMENT_IN_CONFIG);
|
|
}
|
|
|
|
return factory;
|
|
}
|
|
|
|
}
|