gzip

问题 So there are some threads here on PDF compression saying that there is some, but not a lot of, gain in compressing PDFs as PDFs are already compressed. My question is: Is this true for all PDFs including older version of the format? Also I'm sure its possible for someone (an idiot maybe) to place bitmaps into the PDF rather than JPEG etc. Our company has a lot of PDFs in its DBs (some older formats maybe). We are considering using gzip to compress during transmission but don't know if its

问题 I run an ASP.NET application on IIS 6.0. Usually I have compression turned on for both dynamic and static files. However, I've turned compression off temporarily, but "ScriptResource.axd" is still sent compressed. This does not feel like a misconfiguration, as "WebResource.axd" is not compressed. What is the difference between ScriptResource and WebResource, such that the former is still compressed? How is it getting compressed? Thanks. 回答1: Web Resources are handled by the

问题 I run an ASP.NET application on IIS 6.0. Usually I have compression turned on for both dynamic and static files. However, I've turned compression off temporarily, but "ScriptResource.axd" is still sent compressed. This does not feel like a misconfiguration, as "WebResource.axd" is not compressed. What is the difference between ScriptResource and WebResource, such that the former is still compressed? How is it getting compressed? Thanks. 回答1: Web Resources are handled by the

问题 I'm trying to uncompress a GZIPed HTTP Response by using GZIPInputStream . However I always have the same exception when I try to read the stream : java.util.zip.ZipException: invalid bit length repeat My HTTP Request Header: GET www.myurl.com HTTP/1.0\r\n User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; fr; rv:1.9.2) Gecko/20100115 Firefox/3.6\r\n Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3\r\n Accept

问题 If I setup nginx to use gzip, it removes any etag header. The reasoning behind this is that the same resource cannot be byte-for-byte identical given that gzip has various compression levels. But nginx also removes a weak etag, which just means that the resources are semantically equivalent. This seems like incorrect behavior by nginx. Am I missing something? If not, is there a way to fix this? wiki 回答1: You should upgrade to nginx 1.7.3 or higher. Feature: weak entity tags are now preserved

问题 How can i decompress a String that was zipped by PHP gzcompress() function? Any full examples? thx I tried it now like this: public static String unzipString(String zippedText) throws Exception { ByteArrayInputStream bais = new ByteArrayInputStream(zippedText.getBytes("UTF-8")); GZIPInputStream gzis = new GZIPInputStream(bais); InputStreamReader reader = new InputStreamReader(gzis); BufferedReader in = new BufferedReader(reader); String unzipped = ""; while ((unzipped = in.readLine()) != null

问题 I need to create a gzip archive with multiple files inside, how can I do this without ArchiveEntry available for java.util.zip.GZIPOutputStream class? 回答1: According to the Wikipedia entry on gzip : Although its file format also allows for multiple such streams to be concatenated (zipped files are simply decompressed concatenated as if they were originally one file), gzip is normally used to compress just single files. This is why GZIPOutputStream doesn't support ArchiveEntry . Normally,

问题 I read that some versions of IE6 have known issues with gzip compression, but I have found little explanation as to what these issues are. What are the known issues with gzip compression and IE6? 回答1: The problem is described in this answer. If you are using Apache there is information at the Ultimate IE6 > Cheatsheet: How To Fix 25+ Internet Explorer 6 Bugs on how to work around it: Some versions of IE6 prior to the XP SP2 update may have trouble with files that have been served using GZip

问题 I want to gzip a file in Python. I am trying to use the subprocss.check_call(), but it keeps failing with the error 'OSError: [Errno 2] No such file or directory'. Is there a problem with what I am trying here? Is there a better way to gzip a file than using subprocess.check_call? from subprocess import check_call def gZipFile(fullFilePath) check_call('gzip ' + fullFilePath) Thanks!! 回答1: Try this: check_call(['gzip', fullFilePath]) Depending on what you're doing with the data of these files,

问题 My bash fu is not what it should be. I want to create a little batch script which will copy a list of directories into a new zip file. There are (at least) two ways I can think of proving the list of files: read from a file (say config.txt). The file will contain the list of directories to zip up OR hard code the list directly into the bash script The first option seems more straightforward (though less elegant). The two problems I am facing are that I am not sure how to do the following: