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// Copyright (c) 2010 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 CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_
#define CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_
#pragma once
#include <map>
#include <vector>
#include <string>
#include "base/scoped_ptr.h"
#include "base/scoped_vector.h"
#include "base/string16.h"
#include "base/time.h"
#include "chrome/browser/autofill/autofill_profile.h"
#include "chrome/browser/autofill/field_types.h"
#include "chrome/browser/autofill/form_structure.h"
#include "chrome/common/net/url_fetcher.h"
class Profile;
// Handles getting and updating AutoFill heuristics.
class AutoFillDownloadManager : public URLFetcher::Delegate {
public:
enum AutoFillRequestType {
REQUEST_QUERY,
REQUEST_UPLOAD,
};
// An interface used to notify clients of AutoFillDownloadManager.
// Notifications are *not* guaranteed to be called.
class Observer {
public:
// Called when field types are successfully received from the server.
// |heuristic_xml| - server response.
virtual void OnLoadedAutoFillHeuristics(
const std::string& heuristic_xml) = 0;
// Called when heuristic either successfully considered for upload and
// not send or uploaded.
// |form_signature| - the signature of the requesting form.
virtual void OnUploadedAutoFillHeuristics(
const std::string& form_signature) = 0;
// Called when there was an error during the request.
// |form_signature| - the signature of the requesting form.
// |request_type| - type of request that failed.
// |http_error| - HTTP error code.
virtual void OnHeuristicsRequestError(const std::string& form_signature,
AutoFillRequestType request_type,
int http_error) = 0;
protected:
virtual ~Observer() {}
};
// |profile| can be NULL in unit-tests only.
explicit AutoFillDownloadManager(Profile* profile);
virtual ~AutoFillDownloadManager();
// |observer| - observer to notify on successful completion or error.
void SetObserver(AutoFillDownloadManager::Observer *observer);
// Starts a query request to AutoFill servers. The observer is called with the
// list of the fields of all requested forms.
// |forms| - array of forms aggregated in this request.
bool StartQueryRequest(const ScopedVector<FormStructure>& forms);
// Start upload request if necessary. The probability of request going
// over the wire are GetPositiveUploadRate() if it was matched by
// AutoFill, GetNegativeUploadRate() otherwise. Observer will be called
// even if there was no actual trip over the wire.
// |form| - form sent in this request.
// |form_was_matched| - true if form was matched by the AutoFill.
bool StartUploadRequest(const FormStructure& form, bool form_was_matched);
// Cancels pending request.
// |form_signature| - signature of the form being cancelled. Warning:
// for query request if more than one form sent in the request, all other
// forms will be cancelled as well.
// |request_type| - type of the request.
bool CancelRequest(const std::string& form_signature,
AutoFillRequestType request_type);
// Probability of the form upload. Between 0 (no upload) and 1 (upload all).
// GetPositiveUploadRate() is for matched forms,
// GetNegativeUploadRate() for non matched.
double GetPositiveUploadRate() const;
double GetNegativeUploadRate() const;
// These functions called very rarely outside of theunit-tests. With current
// percentages, they would be called once per 100 auto-fillable forms filled
// and submitted by user. The order of magnitude would remain similar in the
// future.
void SetPositiveUploadRate(double rate);
void SetNegativeUploadRate(double rate);
private:
friend class AutoFillDownloadTestHelper; // unit-test.
struct FormRequestData {
std::vector<std::string> form_signatures;
AutoFillRequestType request_type;
};
// Initiates request to AutoFill servers to download/upload heuristics.
// |form_xml| - form structure XML to upload/download.
// |request_data| - form signature hash(es) and indicator if it was a query.
// |request_data.query| - if true the data is queried and observer notified
// with new data, if available. If false heuristic data is uploaded to our
// servers.
bool StartRequest(const std::string& form_xml,
const FormRequestData& request_data);
// URLFetcher::Delegate implementation:
virtual void OnURLFetchComplete(const URLFetcher* source,
const GURL& url,
const URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data);
// Profile for preference storage.
Profile* profile_;
// For each requested form for both query and upload we create a separate
// request and save its info. As url fetcher is identified by its address
// we use a map between fetchers and info.
std::map<URLFetcher*, FormRequestData> url_fetchers_;
AutoFillDownloadManager::Observer *observer_;
// Time when next query/upload requests are allowed. If 50x HTTP received,
// exponential back off is initiated, so this times will be in the future
// for awhile.
base::Time next_query_request_;
base::Time next_upload_request_;
// |positive_upload_rate_| is for matched forms,
// |negative_upload_rate_| for non matched.
double positive_upload_rate_;
double negative_upload_rate_;
// Needed for unit-test.
int fetcher_id_for_unittest_;
bool is_testing_;
};
#endif // CHROME_BROWSER_AUTOFILL_AUTOFILL_DOWNLOAD_H_
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