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// Copyright 2013 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/write_to_file_net_log_observer.h"
#include <stdio.h>
#include <set>
#include <utility>
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "net/log/net_log_util.h"
#include "net/url_request/url_request_context.h"
namespace net {
WriteToFileNetLogObserver::WriteToFileNetLogObserver()
: capture_mode_(NetLogCaptureMode::Default()), added_events_(false) {
}
WriteToFileNetLogObserver::~WriteToFileNetLogObserver() {
}
void WriteToFileNetLogObserver::set_capture_mode(
NetLogCaptureMode capture_mode) {
DCHECK(!net_log());
capture_mode_ = capture_mode;
}
void WriteToFileNetLogObserver::StartObserving(
NetLog* net_log,
base::ScopedFILE file,
base::Value* constants,
URLRequestContext* url_request_context) {
DCHECK(file.get());
file_ = std::move(file);
added_events_ = false;
// 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.
std::string json;
if (constants)
base::JSONWriter::Write(*constants, &json);
else
base::JSONWriter::Write(*GetNetConstants(), &json);
fprintf(file_.get(), "{\"constants\": %s,\n", json.c_str());
// Start events array. It's closed in StopObserving().
fprintf(file_.get(), "\"events\": [\n");
// Add events for in progress requests if a context is given.
if (url_request_context) {
DCHECK(url_request_context->CalledOnValidThread());
std::set<URLRequestContext*> contexts;
contexts.insert(url_request_context);
CreateNetLogEntriesForActiveObjects(contexts, this);
}
net_log->DeprecatedAddObserver(this, capture_mode_);
}
void WriteToFileNetLogObserver::StopObserving(
URLRequestContext* url_request_context) {
net_log()->DeprecatedRemoveObserver(this);
// End events array.
fprintf(file_.get(), "]");
// Write state of the URLRequestContext when logging stopped.
if (url_request_context) {
DCHECK(url_request_context->CalledOnValidThread());
std::string json;
base::JSONWriter::Write(
*GetNetInfo(url_request_context, NET_INFO_ALL_SOURCES), &json);
fprintf(file_.get(), ",\"tabInfo\": %s\n", json.c_str());
}
fprintf(file_.get(), "}");
file_.reset();
}
void WriteToFileNetLogObserver::OnAddEntry(const 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<base::Value> value(entry.ToValue());
std::string json;
base::JSONWriter::Write(*value, &json);
fprintf(file_.get(), "%s%s", (added_events_ ? ",\n" : ""), json.c_str());
added_events_ = true;
}
} // namespace net
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