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// Copyright 2014 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.
#ifndef COMPONENTS_METRICS_METRICS_LOG_UPLOADER_H_
#define COMPONENTS_METRICS_METRICS_LOG_UPLOADER_H_
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/strings/string_piece.h"
namespace metrics {
class ReportingInfo;
// MetricsLogUploader is an abstract base class for uploading UMA logs on behalf
// of MetricsService.
class MetricsLogUploader {
public:
// Type for OnUploadComplete callbacks. These callbacks will receive three
// parameters: A response code, a net error code, and a boolean specifying
// if the connection was secure (over HTTPS).
using UploadCallback = base::RepeatingCallback<void(int, int, bool)>;
// Possible service types. This should correspond to a type from
// DataUseUserData.
enum MetricServiceType {
UMA,
UKM,
};
virtual ~MetricsLogUploader() {}
// Uploads a log with the specified |compressed_log_data|, a |log_hash| and
// |log_signature| for data validation, and |reporting_info|. |log_hash| is
// expected to be the hex-encoded SHA1 hash of the log data before compression
// and |log_signature| is expected to be a base64-encoded HMAC-SHA256
// signature of the log data before compression. When the server receives an
// upload it recomputes the hash and signature of the upload and compares it
// to the ones inlcuded in the upload. If there is a missmatched, the upload
// is flagged. If an Uploader implementation uploads to a server that doesn't
// do this validation then |log_hash| and |log_signature| can be ignored.
virtual void UploadLog(const std::string& compressed_log_data,
const std::string& log_hash,
const std::string& log_signature,
const ReportingInfo& reporting_info) = 0;
};
} // namespace metrics
#endif // COMPONENTS_METRICS_METRICS_LOG_UPLOADER_H_
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