// The contents of this file are subject to the BOINC Public License // Version 1.0 (the "License"); you may not use this file except in // compliance with the License. You may obtain a copy of the License at // http://boinc.berkeley.edu/license_1.0.txt // // Software distributed under the License is distributed on an "AS IS" // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the // License for the specific language governing rights and limitations // under the License. // // The Original Code is the Berkeley Open Infrastructure for Network Computing. // // The Initial Developer of the Original Code is the SETI@home project. // Portions created by the SETI@home project are Copyright (C) 2002 // University of California at Berkeley. All Rights Reserved. // // Contributor(s): // #ifndef _PERS_FILE_XFER_H #define _PERS_FILE_XFER_H #ifndef _WIN32 #include #endif #include "client_types.h" #include "file_xfer.h" // PERS_FILE_XFER represents a persistent file transfer. // A set of URL is given in the FILE_INFO. // For download, the object attempts to download the file // from any of the URLs. // If one fails or is not available, try another, // using an exponential backoff policy to avoid flooding servers. // For upload, try to upload the file to the first URL; // if that gets transient failure, try the others. // Default values for exponential backoff #define PERS_RETRY_DELAY_MIN 60 // 1 minute #define PERS_RETRY_DELAY_MAX (60*60*4) // 4 hours #define PERS_GIVEUP (60*60*24*7*2) // 2 weeks // give up on xfer if this time elapses since last byte xferred class PERS_FILE_XFER { int nretry; // # of retries so far int first_request_time; // UNIX time of first file request bool is_upload; public: int next_request_time; // UNIX time to next retry the file request double last_time, time_so_far; bool xfer_done; FILE_XFER* fxp; // nonzero if file xfer in progress FILE_INFO* fip; PERS_FILE_XFER(); ~PERS_FILE_XFER(); int init(FILE_INFO*, bool is_file_upload); bool poll(time_t now); void handle_xfer_failure(); void retry_or_backoff(); void giveup(); int write(FILE* fout); int parse(FILE* fin); int start_xfer(); void suspend(); }; class PERS_FILE_XFER_SET { FILE_XFER_SET* file_xfers; public: vectorpers_file_xfers; PERS_FILE_XFER_SET(FILE_XFER_SET*); int insert(PERS_FILE_XFER*); int remove(PERS_FILE_XFER*); bool poll(); void suspend(); }; #endif