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Full Discussion: size of char array in c
Top Forums Programming size of char array in c Post 302142192 by Hitori on Thursday 25th of October 2007 03:04:55 AM
Old 10-25-2007
Quote:
Originally Posted by phani_sree
thank u,
ok but we don't know the value of num_of_bytes value?
actually iam reading from webpage using curl socket.i don't know how much data it amy come.
so please show me the solution
If you read from socket HTTP/1.1 response then you can determine the size of the data from Content-Length header. But be aware of chunked responses, i.e.


Code:
HTTP/1.1 200 OK
Date: Fri, 31 Dec 1999 23:59:59 GMT
Content-Type: text/plain
Transfer-Encoding: chunked

1a; ignore-stuff-here
abcdefghijklmnopqrstuvwxyz
10
1234567890abcdef
0
some-footer: some-value
another-footer: another-value
[blank line here]

what corresponds to

Code:
HTTP/1.1 200 OK
Date: Fri, 31 Dec 1999 23:59:59 GMT
Content-Type: text/plain
Content-Length: 42
some-footer: some-value
another-footer: another-value

abcdefghijklmnopqrstuvwxyz1234567890abcdef


see RFC 2616
 

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LEARN ABOUT DEBIAN

plack::middleware::deflater

Plack::Middleware::Deflater(3pm)			User Contributed Perl Documentation			  Plack::Middleware::Deflater(3pm)

NAME

       Plack::Middleware::Deflater - Compress response body with Gzip or Deflate

SYNOPSIS

	 use Plack::Builder;

	 builder {
	   enable sub {
	       my $app = shift;
	       sub {
		   my $env = shift;
		   my $ua = $env->{HTTP_USER_AGENT} || '';
		   # Netscape has some problem
		   $env->{"psgix.compress-only-text/html"} = 1 if $ua =~ m!^Mozilla/4!;
		   # Netscape 4.06-4.08 have some more problems
		    $env->{"psgix.no-compress"} = 1 if $ua =~ m!^Mozilla/4.0[678]!;
		   # MSIE (7|8) masquerades as Netscape, but it is fine
		   if ( $ua =~ m!MSIE (?:7|8)! ) {
		       $env->{"psgix.no-compress"} = 0;
		       $env->{"psgix.compress-only-text/html"} = 0;
		   }
		   $app->($env);
	       }
	   };
	   enable "Deflater",
	       content_type => ['text/css','text/html','text/javascript','application/javascript'],
	       vary_user_agent => 1;
	   sub { [200,['Content-Type','text/html'],["OK"]] }
	 };

DESCRIPTION

       Plack::Middleware::Deflater is a middleware to encode your response body in gzip or deflate, based on "Accept-Encoding" HTTP request
       header. It would save the bandwidth a little bit but should increase the Plack server load, so ideally you should handle this on the
       frontend reverse proxy servers.

       This middleware removes "Content-Length" and streams encoded content, which means the server should support HTTP/1.1 chunked response or
       downgrade to HTTP/1.0 and closes the connection.

CONFIGURATIONS

       content_type
	     content_type => 'text/html',
	     content_type => [ 'text/html', 'text/css', 'text/javascript', 'application/javascript', 'application/x-javascript' ]

	   Content-Type header to apply deflater. if content-type is not defined, Deflater will try to deflate all contents.

       vary_user_agent
	     vary_user_agent => 1

	   Add "User-Agent" to Vary header.

ENVIRONMENT VALUE

       psgix.no-compress
	   Do not apply deflater

       psgix.compress-only-text/html
	   Apply deflater only if content_type is "text/html"

LICENSE

       This software is licensed under the same terms as Perl itself.

AUTHOR

       Tatsuhiko Miyagawa

SEE ALSO

       Plack, <http://httpd.apache.org/docs/2.2/en/mod/mod_deflate.html>

perl v5.14.2							    2012-06-18					  Plack::Middleware::Deflater(3pm)
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