Akhassin at 01:52, 20 June 2010

2010-06-20T01:52:43Z

Akhassin: Created page with ''''NAME''' ns_zlib - Zlib compression support '''SYNOPSIS''' '''ns_zlib compress''' ''string'' '''ns_zlib gunzip''' ''file'' '''ns_zlib gzip''' ''string'' '''ns_zlib gzipfil…'

2010-06-20T01:50:47Z

Created page with ''''NAME''' ns_zlib - Zlib compression support '''SYNOPSIS''' '''ns_zlib compress''' ''string'' '''ns_zlib gunzip''' ''file'' '''ns_zlib gzip''' ''string'' '''ns_zlib gzipfil…'

New page

'''NAME'''

ns_zlib - Zlib compression support

'''SYNOPSIS'''

'''ns_zlib compress''' ''string''
'''ns_zlib gunzip''' ''file''
'''ns_zlib gzip''' ''string''
'''ns_zlib gzipfile''' ''file''
'''ns_zlib uncompress''' ''string''

'''DESCRIPTION'''

The '''ns_zlib''' command enables compressing and uncompressing of strings or files. The command is available if the ''nszlib.so'' module is loaded into AOLserver or the ''libnszlib.so'', ''nszlib.dll'', or ''libnszlib.dylib'' dynamic library is loaded using the '''load''' command in a suitable ''tclsh'' such as ''nstclsh''.
*'''ns_zlib compress''' ''string''
: This command compresses the given string and returns a Tcl byte array object with the compressed data.
*'''ns_zlib gunzip''' ''file''
: This command uncompresses the contents of the given gzipped file and returns a string as the result.
*'''ns_zlib gzipfile''' ''file''
: This command is similar to the '''gzip''' shell routines, compressing the given file into a new file with the ''.gz'' extension. If successful, the original uncompressed file is deleted.
*'''ns_zlib uncompress''' ''bytearray''
: This command takes a byte array object which includes compressed data and returns an uncompressed string object.

'''EXAMPLES'''

: The following examples demonstrate compressing and uncompressing a string;
<pre>

# Compress Tcl string
set test "This is test string"
set data [ns_zlib compress $test]
set test [ns_zlib uncompress $data]
''--> returns "This is test string"''

# Compress the string into gzip format
set gzip [ns_zlib gzip $test]

# Save as gzip file
set fd [open /tmp/test.gz w]
fconfigure $fd -translation binary -encoding binary
puts -nonewline $fd $gzip
close $fd

# Uncompress gzipped file
set test [ns_zlib gunzip /tmp/test.gz]
''--> returns "This is test string"''

</pre>

@@ Line 7: / Line 7: @@
 '''ns_zlib compress''' ''string''
 '''ns_zlib gunzip''' ''file''
 '''ns_zlib gzip''' ''string''
 '''ns_zlib gzipfile''' ''file''
 '''ns_zlib uncompress''' ''string''
@@ Line 36: / Line 40: @@
      set data [ns_zlib compress $test]
      set test [ns_zlib uncompress $data]
-     ''--> returns "This is test string"''
+     #--> returns "This is test string"
      # Compress the string into gzip format
@@ Line 49: / Line 53: @@
      # Uncompress gzipped file
      set test [ns_zlib gunzip /tmp/test.gz]
-     ''--> returns "This is test string"''
+     #--> returns "This is test string"
      </pre>

Ns zlib - Revision history

Akhassin at 01:52, 20 June 2010

Akhassin: Created page with ''''NAME''' ns_zlib - Zlib compression support '''SYNOPSIS''' '''ns_zlib compress''' ''string'' '''ns_zlib gunzip''' ''file'' '''ns_zlib gzip''' ''string'' '''ns_zlib gzipfil…'