86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
/*
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* JsonTraceLogFormatter.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "flow/flow.h"
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#include "flow/JsonTraceLogFormatter.h"
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#include <sstream>
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void JsonTraceLogFormatter::addref() {
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ReferenceCounted<JsonTraceLogFormatter>::addref();
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}
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void JsonTraceLogFormatter::delref() {
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ReferenceCounted<JsonTraceLogFormatter>::delref();
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}
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const char* JsonTraceLogFormatter::getExtension() const {
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return "json";
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}
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const char* JsonTraceLogFormatter::getHeader() const {
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return "";
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}
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const char* JsonTraceLogFormatter::getFooter() const {
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return "";
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}
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namespace {
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void escapeString(std::ostringstream& oss, const std::string& source) {
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for (auto c : source) {
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if (c == '"') {
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oss << "\\\"";
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} else if (c == '\\') {
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oss << "\\\\";
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} else if (c == '\n') {
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oss << "\\n";
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} else if (c == '\r') {
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oss << "\\r";
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} else if (isprint(c)) {
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oss << c;
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} else {
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constexpr char hex[] = "0123456789abcdef";
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int x = int{ static_cast<uint8_t>(c) };
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oss << "\\x" << hex[x / 16] << hex[x % 16];
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}
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}
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}
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} // namespace
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std::string JsonTraceLogFormatter::formatEvent(const TraceEventFields& fields) const {
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std::ostringstream oss;
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oss << "{ ";
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for (auto iter = fields.begin(); iter != fields.end(); ++iter) {
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if (iter != fields.begin()) {
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oss << ", ";
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}
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oss << "\"";
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escapeString(oss, iter->first);
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oss << "\": \"";
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escapeString(oss, iter->second);
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oss << "\"";
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}
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oss << " }\n";
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return std::move(oss).str();
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}
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