compression

C Library for compressing sequential positive integers

生来就可爱ヽ(ⅴ<●) 提交于 2019-12-03 12:00:37
问题 I have the very common problem of creating an index for an in-disk array of strings. In short, I need to store the position of each string in the in-disk representation. For example, a very naive solution would be an index array as follows: uint64 idx[] = { 0, 20, 500, 1024, ..., 103434 }; Which says that the first string is at position 0, the second at position 20, the third at position 500 and the nth at position 103434. The positions are always non-negative 64 bits integers in sequential

IIS 7.5 ASP.NET-4 Gzip compression

北慕城南 提交于 2019-12-03 11:54:17
I just can't seem to get GZIP compression enabled for my ASP.NET 4 application. Only javascript files seem to get compressed. The page, css and others dont get compressed. The response header of a not compressed CSS file is: Content-Type text/css Last-Modified Mon, 09 Aug 2010 20:10:34 GMT Accept-Ranges bytes Etag "5d71bdecfe37cb1:0" Server Microsoft-IIS/7.5 Date Sat, 28 Aug 2010 14:33:56 GMT Content-Length 3364 And for a Javascript file that gets compressed (scriptresource.axd): Cache-Control public Content-Type application/x-javascript Content-Encoding gzip Expires Sun, 28 Aug 2011 14:33:50

Compressing a blob in javascript

走远了吗. 提交于 2019-12-03 09:44:53
问题 I need to send a blob to the server with ajax, but it can end up getting somewhat large, and I'd like to decrease upload time. I've tried jszip already, but that just gave me an empty file inside the zip. I've also tried btoa(), but it turns out that the encoded value just ends up being [object Blob] instead of the actual blob data. What are my options for compressing blobs? Here was the code I used for jszip: var zip = new JSZip(); zip.file("recording.wav", blobFile); var content = zip

How do you compress a string, and get a string back using zlib?

白昼怎懂夜的黑 提交于 2019-12-03 09:42:56
I am trying to utilize Zlib for text compression. For example I have a string T='blah blah blah blah' I need to compress it for this string. I am using S=zlib.compress(T) to compress it. Now what I want is to get the non-binary form of S so that I can decompress T but in a different program. Thanks! EDIT: I guess I got a method to solve what I wanted. Here is the method: import zlib, base64 text = 'STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW STACK OVERFLOW ' code = base64.b64encode(zlib.compress(text,9))

Compression issues with JQuery file in YUI Compressor

元气小坏坏 提交于 2019-12-03 09:37:49
I am trying to minify a few files with YUI compressor. However, I seem to be getting an error on 2 lines of code, which prevents compression. The .js file for jcarouselLite contains 1 error, and my own code contains the other. I have narrowed it down and in both occasions it looks like the the float property used in jQuery is causing this. The line is: li.css({overflow: "hidden", float: o.vertical ? "none" : "left"}); (jcarousellite) $("#now-playing .js-kit-rating div:first").css({width: "80px", float: "right"}).addClass("clearing"); (own code) A working example of the error can be seen by

An efficient way to merge 2 large CSS files

99封情书 提交于 2019-12-03 09:16:41
问题 I'm looking for a tool that allows you to merge 2 large CSS files. All the ones I've tried so far (like CSSMerge) haven't worked out. Some of them just randomly remove properties. Others choke on the non-standard properties like -webkit and -moz and give me errors. And I also need something that preserves the case of each rule. CSSMerge changed all rules to lower-case. 回答1: Try CSS Compressor & Minifier It have lots of options, you can compress and/or minify css. Copy both CSS files into CSS

random seek in 7z single file archive

夙愿已清 提交于 2019-12-03 09:03:07
Is it possible to do random access (a lot of seeks) to very huge file, compressed by 7zip? The original file is very huge (999gb xml) and I can't store it in unpacked format (i have no so much free space). So, if 7z format allows accessing to middle block without uncompressing all blocks before selected one, I can built an index of block beginning and corresponding original file offsets. Header of my 7z archive is 37 7A BC AF 27 1C 00 02 28 99 F1 9D 4A 46 D7 EA // 7z archive version 2;crc; n.hfr offset 00 00 00 00 44 00 00 00 00 00 00 00 F4 56 CF 92 // n.hdr offset; n.hdr size=44. crc 00 1E 1B

How to inflate a file with zlib.NET?

若如初见. 提交于 2019-12-03 08:52:57
I'm using the zlib.NET library to try and inflate files that are compressed by zlib (on a Linux box, perhaps). Here's what I'm doing: zlib.ZInputStream zinput = new zlib.ZInputStream(File.Open(path, FileMode.Open, FileAccess.Read)); while (stopByte != (data = zinput.ReadByte())) { // check data here } zinput.Close(); The data bytes match the compressed data bytes, so I must be doing something wrong. Other than failing to use a "using" statement to close the stream even in the face of an exception, that looks okay to me. Is the data definitely compressed? Are you able to decompress it with zlib

Python - Extracting files from a large (6GB+) zip file

懵懂的女人 提交于 2019-12-03 08:52:13
I have a Python script where I need to extract the contents of a ZIP file. However, the zip file is over 6GB in size. There is a lot of information about zlib and zipfile modules, however, I can't find a single approach that works in my case. I have the code: with zipfile.ZipFile(fname, "r") as z: try: log.info("Extracting %s " %fname) head, tail = os.path.split(fname) z.extractall(folder + "/" + tail) except zipfile.BadZipfile: log.error("Bad Zip file") except zipfile.LargeZipFile: log.error("Zip file requires ZIP64 functionality but that has not been enabled (i.e., too large)") except

Decompress Rar file in Android

可紊 提交于 2019-12-03 08:09:34
I want to learn how to decompress a .rar file in android. Zip files can be easily decompressed using ZipStream. Is there any similar way for rar files. I just realized this with jUnrar from here https://github.com/edmund-wagner/junrar Create a new package within your Android src directory called com.github.junrar You should delete com.github.junrar.vfs2 because it has some dependencies and you probably won't use it anyway. You will probably get some errors about the logger class. You can either remove the few logging lines or like i did write a tiny wrapper which communicates with android.util