01-08-2017
Quote:
Originally Posted by
Don Cragun
In addition to what stomp already said... Download the checksum in a separate file AFTER the download of the main file completes on the server that is downloading the files. Then just look for the 2nd file containing the checksum on the receiving client instead of monitoring the download of the 1st file.
Thanks stomp
Hello Mr. Don, the third party is sending us a zip file , presently they are not sending checksum but it is a good idea to ask them also to send checksum. But i don't understand by your statement
PHP Code:
Download the checksum in a separate file AFTER the download of the main file
. I guess i need to compare checksum of the file at our end with the checksum of what the other party would send ? . In that case also i need to watch continuously if the checksum have matched or not by using the same while loop. I also don't understand why not to monitoring the file.
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sum(n) sum sum(n)
NAME
sum - calculate a sum(1) compatible checksum
SYNOPSIS
package require Tcl 8.2
package require sum ?1.0?
::crc::sum ?-format format? message
::crc::sum ?-format format? -filename file
DESCRIPTION
This package provides a Tcl-only implementation of the sum(1) command which calculates a 16 bit checksum value from the input data. The
BSD sum algorithm is used by default but the SysV algorithm is also available.
COMMANDS
::crc::sum ?-format format? message
::crc::sum ?-format format? -filename file
The command takes string data or a file name and returns a checksum value calculated using the sum(1) algorithm. The result is for-
matted using the format(n) specifier provided or as an unsigned integer (%u) by default.
OPTIONS
-filename name
Return a checksum for the file contents instead of for parameter data.
-format string
Return the checksum using an alternative format template.
EXAMPLES
% crc::sum "Hello, World!"
37287
% crc::sum -format 0x%X "Hello, World!"
0x91A7
% crc::sum -file sum.tcl
13392
SEE ALSO
sum(1), cksum(n), crc32(n)
AUTHORS
Pat Thoyts
KEYWORDS
sum, cksum, checksum, crc, crc32, cyclic redundancy check, data integrity, security
crc 1.0 sum(n)