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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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 <android-base/file.h>
#include <android/os/DropBoxManager.h>
#include <androidfw/ZipUtils.h>
#include "storage/DropboxReader.h"
using android::base::unique_fd;
using android::binder::Status;
using android::os::DropBoxManager;
using android::sp;
using android::String16;
using android::ZipUtils;
using std::vector;
namespace android {
namespace os {
namespace statsd {
status_t DropboxReader::readStatsLogs(FILE* out, const string& tag, long msec) {
sp<DropBoxManager> dropbox = new DropBoxManager();
StatsLogReport logReport;
long timestamp = msec;
// instead of while(true), put a hard limit 1000. Dropbox won't have more than 1000 files.
for (int i = 0; i < 1000; i++) {
DropBoxManager::Entry entry;
Status status = dropbox->getNextEntry(String16(tag.c_str()), timestamp, &entry);
if (!status.isOk()) {
ALOGD("No more entries, or failed to read. We can't tell unfortunately.");
return android::OK;
}
const unique_fd& fd = entry.getFd();
// use this timestamp for next query.
timestamp = entry.getTimestamp();
if (entry.getFlags() & DropBoxManager::IS_GZIPPED) {
if (!parseFromGzipFile(fd, logReport)) {
// Failed to parse from the file. Continue to fetch the next entry.
continue;
}
} else {
if (!parseFromFile(fd, logReport)) {
// Failed to parse from the file. Continue to fetch the next entry.
continue;
}
}
printLog(out, logReport);
}
return android::OK;
}
bool DropboxReader::parseFromGzipFile(const unique_fd& fd, StatsLogReport& logReport) {
FILE* file = fdopen(fd, "r");
bool result = false;
bool scanResult;
int method;
long compressedLen;
long uncompressedLen;
unsigned long crc32;
scanResult = ZipUtils::examineGzip(file, &method, &uncompressedLen, &compressedLen, &crc32);
if (scanResult && method == kCompressDeflated) {
vector<uint8_t> buf(uncompressedLen);
if (ZipUtils::inflateToBuffer(file, &buf[0], uncompressedLen, compressedLen)) {
if (logReport.ParseFromArray(&buf[0], uncompressedLen)) {
result = true;
}
}
} else {
ALOGE("This isn't a valid deflated gzip file");
}
fclose(file);
return result;
}
// parse a non zipped file.
bool DropboxReader::parseFromFile(const unique_fd& fd, StatsLogReport& logReport) {
string content;
if (!android::base::ReadFdToString(fd, &content)) {
ALOGE("Failed to read file");
return false;
}
if (!logReport.ParseFromString(content)) {
ALOGE("failed to parse log entry from data");
return false;
}
return true;
}
void DropboxReader::printLog(FILE* out, const StatsLogReport& logReport) {
fprintf(out, "start_time_ns=%lld, end_time_ns=%lld, ", logReport.start_report_nanos(),
logReport.end_report_nanos());
for (int i = 0; i < logReport.event_metrics().data_size(); i++) {
EventMetricData eventMetricData = logReport.event_metrics().data(i);
// TODO: Pretty-print the proto.
// fprintf(out, "EventMetricData=%s", eventMetricData.SerializeAsString().c_str());
}
fprintf(out, "\n");
}
} // namespace statsd
} // namespace os
} // namespace android
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