deflate

http/1.0 and deflate/gzip

由 淺唱寂寞╮ 提交于 2019-12-01 08:42:35
问题 Is http/1.0 able to handle deflated and gzip content? I've finished to implement deflate and gzip in my minimalist web server and I don't really know if browsers with http/1.0 are capable to handle deflate and gzip compressed content. 回答1: Well really it's down to the browser; not the protocol (HTTP 1.0 does allow for compression quite happily) You should be examining the Accept-Encoding header, which will either be gzip, deflate. If the header isn't there then don't compress. 回答2: There

java.util.zip.deflater equivalent in c#

由 血红的双手。 提交于 2019-12-01 08:12:28
does anyone know how can I achieve java's Deflater.deflate() functionality in .NET so it would be understandable for java's Infalter.inflate() method? regards, Rafal I have used #zipLib . It is pretty straight forward. Taken from their site: #ziplib (SharpZipLib, formerly NZipLib) is a Zip, GZip, Tar and BZip2 library written entirely in C# for the .NET platform. It is implemented as an assembly (installable in the GAC), and thus can easily be incorporated into other projects (in any .NET language). The creator of #ziplib put it this way: "I've ported the zip library over to C# because I

why png size doesn't change after using http gzip compression

由 北城余情 提交于 2019-11-30 08:11:40
I use following .htaccess to set gzip compression: AddOutputFilterByType DEFLATE text/html image/png image/jpeg text/css text/javascript Please check this url: http://www.coinex.com/cn/silver_panda/proof/china_1984_27_gram_silver_panda_coin/ the gzip compression works for html, css, js and jpg, but not working for png (really amazing..) Rob Trickey PNG is already a compressed data format. Compressing it with GZIP is not likely to decrease the size, and can in fact make it larger. I'm surprised you're seeing benefits when GZIP-ing JPGs, as they are also compressed. See here for Google's tips on

Why are major web sites using gzip?

由 最后都变了- 提交于 2019-11-30 06:53:21
问题 I just searched about gzip and Deflate, and found out that Deflate is better. GZip or Deflate for HTTP compression Why use deflate instead of gzip for text files served by Apache? Is there any performance hit involved in choosing gzip over deflate for http compression? Deflate compression browser compatibility and advantages over GZIP But when I checked the response headers of Google, Facebook and StackExchange, all of them were using GZIP. Why do they use gzip instead of Deflate? 回答1: It is

deflate and inflate (zlib.h) in C

由 流过昼夜 提交于 2019-11-30 04:13:00
I am trying to implement the zlib.h deflate and inflate functions to compress and decompress a char array (not a file). I would like to know if the following syntax is correct ? Am I missing something or defined something incorrectly ? char a[50] = "Hello World!"; char b[50]; char c[50]; // deflate // zlib struct z_stream defstream; defstream.zalloc = Z_NULL; defstream.zfree = Z_NULL; defstream.opaque = Z_NULL; defstream.avail_in = (uInt)sizeof(a); // size of input defstream.next_in = (Bytef *)a; // input char array defstream.avail_out = (uInt)sizeof(b); // size of output defstream.next_out =

DeflatorInputStream and DeflatorOutputStream do not reconstruct the original data

由 风格不统一 提交于 2019-11-29 18:39:52
问题 I want to compress some data, so I came across the DeflatorInputStream & DeflatorOutputStream classes. However, the following example shows that I can't seem to reconstruct my original data when using these classes. When I switch to a ZipInputStream and ZipOutputStream it does work, but since I don't need zip files per se, I thought a generic compression would be better. Mainly I'm interested in understanding why this example doesn't work. //Create some "random" data int bytesLength = 1024;

Is there any performance hit involved in choosing gzip over deflate for http compression?

由 痴心易碎 提交于 2019-11-29 13:29:14
We recently switched some of our sites from deflate to gzip and noticed a significant increase in cpu load on our servers. Is it possible that you are experiencing cache miss? That is, compressed content is sometimes cached compressed but switching compression schemes would (or at least should) invalidate that cache causing dramatically increased cpu utilization. Did you try switching it back? Gorpik gzip is, basically, deflate with some additional headers. So there should not be a significant performance hit. Now, maybe your deflate tool is just more efficient than your gzip tool. Are you

Using Java Deflater/Inflater with custom dictionary causes IllegalArgumentException

由 烈酒焚心 提交于 2019-11-29 02:25:06
The following code is based on the example given in the javadocs for java.util.zip.Deflater . The only changes I have made is to create a byte array called dict and then set the dictionary on both the Deflater and Inflater instances using the setDictionary(byte[]) method. The problem I'm seeing is that when I call Inflater.setDictionary() with the exact same array as I used for the Deflater, I get an IllegalArgumentException. Here is the code in question: import java.util.zip.Deflater; import java.util.zip.Inflater; public class DeflateWithDictionary { public static void main(String[] args)

Why are major web sites using gzip?

由 孤者浪人 提交于 2019-11-28 22:27:23
I just searched about gzip and Deflate , and found out that Deflate is better. GZip or Deflate for HTTP compression Why use deflate instead of gzip for text files served by Apache? Is there any performance hit involved in choosing gzip over deflate for http compression? Deflate compression browser compatibility and advantages over GZIP But when I checked the response headers of Google, Facebook and StackExchange, all of them were using GZIP. Why do they use gzip instead of Deflate? It is apparently due to a misunderstanding resulting from the choice of the name "Deflate". The http standard

apache compression Deflate .js and .css files not compressed?

由 荒凉一梦 提交于 2019-11-28 18:19:55
In Apache Im enabling output compression by adding the following to my .htaccess file: # compress text, html, javascript, css, xml: AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript # Or, compress certain file types by extension:
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