Reading binary file from channel on host computer
in [TCL]
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From: Debby Luebke on 16 Jan 2010 10:36 hi Tcl-ers: i have a problem reading binary files from channel on the host computer. host computer info is as follows: MS Win 2003 server with SP2 and Tcl 8.5.7.0 i gave a thorough read to article at http://wiki.tcl.tk/1180 . i follow all the rules explained but no file gets thru . # Setter proc set_file { file sock } { set size [file size $file] fconfigure $sock -translation binary set fid [open "$file" r] fconfigure $fid -translation binary set data [read $fid $size] puts $sock $size puts -nonewline $sock $data close $fiid } # Getter proc read_file { sock sender_ip sender_port } { fconfigure $sock -translation binary gets $sock size set data [read $sock $size] set fid [open "file.zip" w] fconfigure $fid -translation binary puts -nonewline $fid $data close $fid } please help. D.
From: Alexandre Ferrieux on 16 Jan 2010 13:18 On Jan 16, 4:36 pm, Debby Luebke <debby.lue...(a)gmail.com> wrote: > hi Tcl-ers: > > i have a problem reading binary files from channel on the host > computer. > > host computer info is as follows: MS Win 2003 server with SP2 and Tcl > 8.5.7.0 > > i gave a thorough read to article athttp://wiki.tcl.tk/1180. i > follow all the rules explained but no file gets thru . > > # Setter > proc set_file { file sock } { > set size [file size $file] > fconfigure $sock -translation binary > set fid [open "$file" r] > fconfigure $fid -translation binary > set data [read $fid $size] > puts $sock $size > puts -nonewline $sock $data > close $fiid > > } > > # Getter > proc read_file { sock sender_ip sender_port } { > fconfigure $sock -translation binary > gets $sock size > set data [read $sock $size] > set fid [open "file.zip" w] > fconfigure $fid -translation binary > puts -nonewline $fid $data > close $fid > > } > > please help. > D. Hint 1: define "nothing gets thru" : does execution reach the end of both functions ? (use puts stderr to see progression) Hint 2: give the whole program, not just the two functions above. Hint 3: since network transmission is involved, take a wireshark/ tcpdump trace (filtered with "tcp.port==...") to get an external view of the problem. -Alex
From: Gerald W. Lester on 16 Jan 2010 14:14 Debby Luebke wrote: > hi Tcl-ers: > > i have a problem reading binary files from channel on the host > computer. > > host computer info is as follows: MS Win 2003 server with SP2 and Tcl > 8.5.7.0 > > i gave a thorough read to article at http://wiki.tcl.tk/1180 . i > follow all the rules explained but no file gets thru . > > # Setter > proc set_file { file sock } { > set size [file size $file] > fconfigure $sock -translation binary > set fid [open "$file" r] > fconfigure $fid -translation binary > set data [read $fid $size] > puts $sock $size > puts -nonewline $sock $data > close $fiid > } > > # Getter > proc read_file { sock sender_ip sender_port } { > fconfigure $sock -translation binary > gets $sock size > set data [read $sock $size] > set fid [open "file.zip" w] > fconfigure $fid -translation binary > puts -nonewline $fid $data > close $fid > } 1) with binary files do not use gets use read 2) you need to set the socket blocking in "set_file" -- +------------------------------------------------------------------------+ | Gerald W. Lester | |"The man who fights for his ideals is the man who is alive." - Cervantes| +------------------------------------------------------------------------+
From: Debby Luebke on 17 Jan 2010 01:30 On Jan 16, 11:14 pm, "Gerald W. Lester" <Gerald.Les...(a)cox.net> wrote: > Debby Luebke wrote: > > hi Tcl-ers: > > > i have a problem reading binary files from channel on the host > > computer. > > > host computer info is as follows: MS Win 2003 server with SP2 and Tcl > > 8.5.7.0 > > > i gave a thorough read to article athttp://wiki.tcl.tk/1180. i > > follow all the rules explained but no file gets thru . > > > # Setter > > proc set_file { file sock } { > > set size [file size $file] > > fconfigure $sock -translation binary > > set fid [open "$file" r] > > fconfigure $fid -translation binary > > set data [read $fid $size] > > puts $sock $size > > puts -nonewline $sock $data > > close $fiid > > } > > > # Getter > > proc read_file { sock sender_ip sender_port } { > > fconfigure $sock -translation binary > > gets $sock size > > set data [read $sock $size] > > set fid [open "file.zip" w] > > fconfigure $fid -translation binary > > puts -nonewline $fid $data > > close $fid > > } > thank you for your comments. > 1) with binary files do not use gets use read i do gets of size in code to specify how many bytes will be read and returned: gets $sock size set data [read $sock $size] i tried to put all stuff in header and scan length as you suggested in a neighbor thread to a collegue but then i get only size and no file contents at the host end. can't figure out why. puts do not help either , execution reaches end with no problem. > 2) you need to set the socket blocking in "set_file" thanks, will try blocking -none > > -- > +------------------------------------------------------------------------+ > | Gerald W. Lester | > |"The man who fights for his ideals is the man who is alive." - Cervantes| > +------------------------------------------------------------------------+
From: Alexandre Ferrieux on 17 Jan 2010 04:53
On Jan 16, 8:14 pm, "Gerald W. Lester" <Gerald.Les...(a)cox.net> wrote: > > 1) with binary files do not use gets use read No. Here it's a mixed text-binary protocol: length sent first as a line, then data. Gets is perfectly adapted to this use. > 2) you need to set the socket blocking in "set_file" Default being blocking mode, what do you want to add ? -Alex |