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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 "chrome/browser/net/net_log_logger.h"
#include <stdio.h>
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "chrome/browser/ui/webui/net_internals/net_internals_ui.h"
NetLogLogger::NetLogLogger(FILE* file) : file_(file), added_events_(false) {
DCHECK(file);
// Write constants to the output file. This allows loading files that have
// different source and event types, as they may be added and removed
// between Chrome versions.
scoped_ptr<Value> value(NetInternalsUI::GetConstants());
std::string json;
base::JSONWriter::Write(value.get(), &json);
fprintf(file_.get(), "{\"constants\": %s,\n", json.c_str());
fprintf(file_.get(), "\"events\": [\n");
}
NetLogLogger::~NetLogLogger() {
if (file_.get())
fprintf(file_.get(), "]}");
}
void NetLogLogger::StartObserving(net::NetLog* net_log) {
net_log->AddThreadSafeObserver(this, net::NetLog::LOG_ALL_BUT_BYTES);
}
void NetLogLogger::StopObserving() {
net_log()->RemoveThreadSafeObserver(this);
}
void NetLogLogger::OnAddEntry(const net::NetLog::Entry& entry) {
// Add a comma and newline for every event but the first. Newlines are needed
// so can load partial log files by just ignoring the last line. For this to
// work, lines cannot be pretty printed.
scoped_ptr<Value> value(entry.ToValue());
std::string json;
base::JSONWriter::Write(value.get(), &json);
fprintf(file_.get(), "%s%s",
(added_events_ ? ",\n" : ""),
json.c_str());
added_events_ = true;
}
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