compression

问题 I set Content Type=text/xml in extra field of header while compressing. Below is my header. PK�*�H27664.040.678.FI00091710.xmlContent Type=text/xml It gives me error while decompressing validation fails "Header is corrupt". When removing the extra field Content Type=text/xml everything works fine. I need to set header extra field as it s necessary for me. Can someone help me how I can proceed it without getting error with extra field. Please help. Thanks in advance 回答1: The extra field itself

问题 I have a working ASP.Net 2.0 code in my development server that uses jQuery Ajax. The result of the ajax call is used to load dropdown values. But when this code is deployed to a new DMZ server, the result is not getting populated in dropdown – though I am getting 200 OK as response. One obvious thing is that the Type is different in the response. It is expected as application/json but coming as text/plain . I have success call back and error callback codes. Along with this I have handlers

问题 I want to upload video files to server and compress before uploading. I'm using ffmpeg libx264. I have seen viber can upload 30 second video file of size 78MB within a minute [reduce it's down to 2.3MB]. I want to know how do they do it so fast? What I have tried so far - FFMPEG version : n2.4.2 Built with gcc 4.8 Build Configuraiton : --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime

问题 In my last question, nos gave a method of removing the most significant bit from an ASCII character byte, which matches exactly what my professor said when describing the project. My problem is how to strip the significant bit and pack it into a buffer using read and write commands. Since the write command takes in a length in the number of bytes to write, how do I go deeper to the bit level of the buffer array? 回答1: Probably the simplest way to do it is in chunks of eight bytes. Read in a

问题 I got lzo library to use in our application. The version was provided is 1.07. They have given me .lib along with some header file and some .c source files. I have setup test environment as per specs. I am able to see lzo routine functions in my application. Here is my test application #include "stdafx.h" #include "lzoconf.h" #include "lzo1z.h" #include <stdlib.h> int _tmain(int argc, _TCHAR* argv[]) { FILE * pFile; long lSize; unsigned char *i_buff; unsigned char *o_buff; int i_len,e = 0;

问题 I have found some tools like this one that let me create "auto-extracting" javascript for javascript code in a web page, which employ a variety of techniques to minimize transfer size. I have a webpage which does have a rather large chunk of javascript code in it. But since I haven't gotten around to optimizing the filesize yet I was thinking about doing the same sort of thing with the HTML bits of my website too. On my blog page the PHP script pulls HTML snippets from a large number of text

问题 I've been supplied with a zipped file containing multiple individual streams of compressed XML. The compressed file is 833 mb. If I try to decompress it as a single object, I only get the first stream (about 19 kb). I've modified the following code supplied as a answer to an older question to decompress each stream and write it to a file: import zlib outfile = open('output.xml', 'w') def zipstreams(filename): """Return all zip streams and their positions in file.""" with open(filename, 'rb')

问题 I have implemented FTS in my app, but the size is too big. I would like to compress it somehow. I read this on the sqlite website: -- Create an FTS4 table that stores data in compressed form. This -- assumes that the scalar functions zip() and unzip() have been (or -- will be) added to the database handle. CREATE VIRTUAL TABLE papers USING fts4(author, document, compress=zip, uncompress=unzip); But I am struggling to find an example of these scalar functions. Please if someone could provide

问题 Imagine these two chunks of code residing in htaccess for speeding up the website. With php 5.2.3 on apache 2.0 block A # preserve bandwidth for PHP enabled servers <ifmodule mod_php4.c> php_value zlib.output_compression 16386 </ifmodule> block B # compress speficic filetypes <IfModule mod_deflate.c> <FilesMatch "\.(js|css|eot|ttf|svg|xml|ast|php)$"> SetOutputFilter DEFLATE </FilesMatch> </IfModule> Questions that arise: Q1. Is this the proper way to combine these two blocks A + B into 1

问题 I hava a problem understanding and implementing a permessage-deflate extension in WebSockets. So far, I have added 'Sec-WebSocket-Extensions: permessage-deflate' inside handshake code. It seems to work all fine. However when I send a "TEST" message from the server (Node.js) to the Client (JS), it seems that the browser (both Chrome and Firefox) is not decompressing the data itself. How to properly implement data compression and decompression using permessage-deflate extension? Request Header: