gzip | 易学教程

GZIP Compression on static Amazon S3 files

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问题 I would like to implement GZIP compression on my site. I've implemented it on IIS and the HTML page is compressed successfully as expected. Now the issue is with CSS and JS file, which I get from Amazon S3 . They are not at all compressed. I wanted to compress them too. Please guide me how to do it. Sharing links for it help me a lot. Update: I've added Meta Header on S3 files as "Content-Encoding:gzip", now its showing in Response header. Still the file size is same and no effect of

GZIP Compression on static Amazon S3 files

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Python equivalent of piping file output to gzip in Perl using a pipe

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问题 I need to figure out how to write file output to a compressed file in Python, similar to the two-liner below: open ZIPPED, "| gzip -c > zipped.gz"; print ZIPPED "Hello world\n"; In Perl, this uses Unix gzip to compress whatever you print to the ZIPPED filehandle to the file "zipped.gz". I know how to use "import gzip" to do this in Python like this: import gzip zipped = gzip.open("zipped.gz", 'wb') zipped.write("Hello world\n") However, that is extremely slow. According to the profiler, using

Modify response body retrofit 2.2 interceptor

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问题 I'm developing an app using Retrofit 2 to request to API. This API is in ASP.NET and it is zipping with GZip and encoding to Base64, like the code below: private static string Compress(string conteudo) { Encoding encoding = Encoding.UTF8; byte[] raw = encoding.GetBytes(conteudo); using (var memory = new MemoryStream()) { using (GZipStream gzip = new GZipStream(memory, CompressionMode.Compress, true)) { gzip.Write(raw, 0, raw.Length); } return Convert.ToBase64String(memory.ToArray()); } }

How to convert an image to a base64 string with gzip- android

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问题 I am trying to convert and compress an image taken from a filepath on android to be converted with base64's gzip (i am using this because my desktop version, written in java, is doing the same). Here is what I have currently for compression: Bitmap bm = BitmapFactory.decodeFile(imagePath); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.JPEG, 100, baos); byte[] data = baos.toByteArray(); String base64Str = null; ByteArrayOutputStream out_bytes = new

Linux 常用命令大全

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su 　　su命令是最基本的命令之一，常用于不同用户间切换。例如，如果登录为 user1，要切换为user2，只要用如下命令：　　$su user2 　　然后系统提示输入user2口令，输入正确的口令之后就可以切换到user2。完成之后就可以用exit命令返回到user1。　　su命令的常见用法是变成根用户或超级用户。如果发出不带用户名的su命令，则系统提示输入根口令，输入之后则可切换为根用户。　　如果登录为根用户，则可以用su命令成为系统上任何用户而不需要口令。　　pwd 　　pwd命令也是最常用最基本的命令之一，用于显示用户当前所在的目录。　　cd 　　cd命令不仅显示当前状态，还改变当前状态，它的用发跟dos下的cd命令基本一致。　　cd ..可进入上一层目录　　cd -可进入上一个进入的目录　　cd ~可进入用户的home目录　　ls 　　ls命令跟dos下的dir命令一样，用于显示当前目录的内容。　　如果想取得详细的信息，可用ls -l命令，这样就可以显示目录内容的详细信息。　　如果目录下的文件太多，用一屏显示不了，可以用ls -l |more分屏显示。　　find 　　find命令用于查找文件。这个命令可以按文件名、建立或修改日期、所有者(通常是建立文件的用户)、文件长度或文件类型进行搜索。　　find命令的基本结构如下：　　$find

Is Vary: Accept-Encoding overkill?

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问题 After reading about how gzip compression works it got me thinking. If the Origin and Proxy server (CDN) both support gzip is adding a Vary: Accept-Encoding header necessary? 回答1: The Vary: Accept-Encoding header has more to do with caching than compression. When the Vary: Accept-Encoding header is present, it tells the client that the file can be cached/is the same whether or not the client requests compression. If for some reason the client has an uncompressed version of the file in its

How can I gzip my JavaScript and CSS files?

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问题 I have a problem, I have to gzip a prototype Lib, but i totaly have no idea how to do this, where to start and how does it works. :) I find some tutorials but that wasn't helpful... So I have a folder with my JS Files: /compressed/js/ 1.js 2.js 3.js I'm calling these files for a test in this file /compresses/index.php <link rel="javascript" type="text/js" href="js/tabs.js" /> <link rel="javascript" type="text/js" href="js/fb.js" /> So what do I have to do? :) 回答1: You can use apache's mod

How can I recover files from a corrupted .tar.gz archive?

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问题 I have a large number of files in a .tar.gz archive. Checking the file type with the command file SMS.tar.gz gives the response gzip compressed data - deflate method , max compression When I try to extract the archive with gunzip, after a delay I receive the message gunzip: SMS.tar.gz: unexpected end of file Is there any way to recover even part of the archive? 回答1: Are you sure that it is a gzip file? I would first run 'file SMS.tar.gz' to validate that. Then I would read the The gzip

Apply GZIP compression to a CSV in Python Pandas

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问题 I am trying to write a dataframe to a gzipped csv in python pandas, using the following: import pandas as pd import datetime import csv import gzip # Get data (with previous connection and script variables) df = pd.read_sql_query(script, conn) # Create today's date, to append to file todaysdatestring = str(datetime.datetime.today().strftime('%Y%m%d')) print todaysdatestring # Create csv with gzip compression df.to_csv('foo-%s.csv.gz' % todaysdatestring, sep='|', header=True, index=False,