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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/log/net_log_values.h"
#include "base/base64.h"
#include "base/strings/escape.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/values.h"
namespace net {
namespace {
// IEEE 64-bit doubles have a 52-bit mantissa, and can therefore represent
// 53-bits worth of precision (see also documentation for JavaScript's
// Number.MAX_SAFE_INTEGER for more discussion on this).
//
// If the number can be represented with an int or double use that. Otherwise
// fallback to encoding it as a string.
template <typename T>
base::Value NetLogNumberValueHelper(T num) {
// Fits in a (32-bit) int: [-2^31, 2^31 - 1]
if ((!std::is_signed<T>::value || (num >= static_cast<T>(-2147483648))) &&
(num <= static_cast<T>(2147483647))) {
return base::Value(static_cast<int>(num));
}
// Fits in a double: (-2^53, 2^53)
if ((!std::is_signed<T>::value ||
(num >= static_cast<T>(-9007199254740991))) &&
(num <= static_cast<T>(9007199254740991))) {
return base::Value(static_cast<double>(num));
}
// Otherwise format as a string.
return base::Value(base::NumberToString(num));
}
} // namespace
base::Value NetLogStringValue(base::StringPiece raw) {
// The common case is that |raw| is ASCII. Represent this directly.
if (base::IsStringASCII(raw))
return base::Value(raw);
// For everything else (including valid UTF-8) percent-escape |raw|, and add a
// prefix that "tags" the value as being a percent-escaped representation.
//
// Note that the sequence E2 80 8B is U+200B (zero-width space) in UTF-8. It
// is added so the escaped string is not itself also ASCII (otherwise there
// would be ambiguity for consumers as to when the value needs to be
// unescaped).
return base::Value("%ESCAPED:\xE2\x80\x8B " +
base::EscapeNonASCIIAndPercent(raw));
}
base::Value NetLogBinaryValue(base::span<const uint8_t> bytes) {
return NetLogBinaryValue(bytes.data(), bytes.size());
}
base::Value NetLogBinaryValue(const void* bytes, size_t length) {
std::string b64;
base::Base64Encode(
base::StringPiece(reinterpret_cast<const char*>(bytes), length), &b64);
return base::Value(std::move(b64));
}
base::Value NetLogNumberValue(int64_t num) {
return NetLogNumberValueHelper(num);
}
base::Value NetLogNumberValue(uint64_t num) {
return NetLogNumberValueHelper(num);
}
base::Value NetLogNumberValue(uint32_t num) {
return NetLogNumberValueHelper(num);
}
base::Value NetLogParamsWithInt(base::StringPiece name, int value) {
base::Value::Dict params;
params.Set(name, value);
return base::Value(std::move(params));
}
base::Value NetLogParamsWithInt64(base::StringPiece name, int64_t value) {
base::Value::Dict params;
params.Set(name, NetLogNumberValue(value));
return base::Value(std::move(params));
}
base::Value NetLogParamsWithBool(base::StringPiece name, bool value) {
base::Value::Dict params;
params.Set(name, value);
return base::Value(std::move(params));
}
base::Value NetLogParamsWithString(base::StringPiece name,
base::StringPiece value) {
base::Value::Dict params;
params.Set(name, value);
return base::Value(std::move(params));
}
} // namespace net
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