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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_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_
#define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_
#include <string>
#include "chrome/service/cloud_print/print_system.h"
#include "googleurl/src/gurl.h"
class DictionaryValue;
class Task;
class URLFetcher;
// Helper methods for the cloud print proxy code.
class CloudPrintHelpers {
public:
static GURL GetUrlForPrinterRegistration(const GURL& cloud_print_server_url);
static GURL GetUrlForPrinterUpdate(const GURL& cloud_print_server_url,
const std::string& printer_id);
static GURL GetUrlForPrinterDelete(const GURL& cloud_print_server_url,
const std::string& printer_id);
static GURL GetUrlForPrinterList(const GURL& cloud_print_server_url,
const std::string& proxy_id);
static GURL GetUrlForJobFetch(const GURL& cloud_print_server_url,
const std::string& printer_id);
static GURL GetUrlForJobStatusUpdate(const GURL& cloud_print_server_url,
const std::string& job_id,
cloud_print::PrintJobStatus status);
static GURL GetUrlForJobStatusUpdate(
const GURL& cloud_print_server_url, const std::string& job_id,
const cloud_print::PrintJobDetails& details);
// Parses the response data for any cloud print server request. The method
// returns false if there was an error in parsing the JSON. The succeeded
// value returns the value of the "success" value in the response JSON.
// Returns the response as a dictionary value.
static bool ParseResponseJSON(const std::string& response_data,
bool* succeeded, DictionaryValue** response_dict);
// Sets up common parameters for a cloud print request
// (such as the GAIA auth token in the request headers, the request context
// etc).
static void PrepCloudPrintRequest(URLFetcher* request,
const std::string& auth_token);
// Strictly speaking, this helper method is not specific to cloud printing.
// It handles the logic to retry tasks when the server returns an error.
// The parameters are as below:
// |error_count| Contains the current number of consecutive failed attempts.
// This method increments it (in/out)
// |max_retry_count| Number of retries before giving up. -1 implies no limit.
// |max_retry_interval| Maximum amount of time (in ms) we are willing to
// wait between retries. -1 implies no limit.
// |base_retry_interval| Starting value of the retry interval. This
// method progressively increases the interval on each retry.
// |task_to_retry| The task to be retried.
// |task_on_give_up| Task to be performed when we give up. This is only
// valid when max_retry_count is not -1. It can be NULL.
static void HandleServerError(int* error_count, int max_retry_count,
int64 max_retry_interval,
int64 base_retry_interval,
Task* task_to_retry, Task* task_on_give_up);
// Prepares one value as part of a multi-part upload request.
static void AddMultipartValueForUpload(
const std::string& value_name, const std::string& value,
const std::string& mime_boundary, const std::string& content_type,
std::string* post_data);
// Create a MIME boundary marker (27 '-' characters followed by 16 hex digits).
static void CreateMimeBoundaryForUpload(std::string *out);
private:
CloudPrintHelpers() {
}
};
#endif // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_
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