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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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