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