compression

问题 I am having trouble in returning compressed response (GZip) from my Java Servlet, to a JSP. Flow : Request comes to java servlet Process the request, and create a JSON object, with the response Convert the JSON object to string Compress the response string with GZip The compressed response string is set as attribute in the request object and control passed to JSP In the JSP, the response string (compressed) is printed on screen Precautions : Request object has "Accepting-Encoding" set with

问题 Recently I have tried Django-Compressor. It's awesome and i like it too much, but i am having some troubles with offline compression ( COMPRESS_OFFLINE = True ) and template tags. I have {{ django_vars }} and {% django_tags %} inside my JS code and i guess Google Clousure compiler (the filter what i'm using with Django-Compressor) doesn't know to identify them. In fact, I think Django template structures like {% if something %} are deleted. How can i do to keep all this template vars/tags in

问题 As I record the video file for 1min it take 3mb of size as i want to post this file to server it is taking more time.So I need to decrease the time by compassing the recorded video file and send it to server.Is there possibility to compress the video file programmatically. Thanks in advance. Teja. 回答1: Note that simply compressing it with some zip-algorithm (relatively easy to do in Java) wouldn't help you much. Try compressing the file yourself. (If it did make the file smaller, it would

问题 Using Numpy and h5py, it is possible to create ‘compound datatype’ datasets to be stored in an hdf5-file: import h5py import numpy as np # # Create a new file using default properties. # file = h5py.File('compound.h5','w') # # Create a dataset under the Root group. # comp_type = np.dtype([('fieldA', 'i4'), ('fieldB', 'f4')]) dataset = file.create_dataset("comp", (4,), comp_type) It is also possible to use various compression filters in a ‘compression pipeline’, among them the ‘scale-offset’

问题 I have a Linux Python script that needs to unzip some zip files. I was using the zipfile module. On a few of these files I'm getting: BadZipfile: Unsupported compression method 98 for file Searching around it seems these files are using Method 98 PPMD compression. I figured if python couldn't do it, I'd make a hack system call to unzip 6.0 and be done with it. This errors: skipping: fileName `PPMd' method not supported I've tried 7zip: Extracting fileName Unsupported Method I thought I hit

问题 There is no straight way to append to a compressed tar archive. As the documentation states: Note that 'a:gz' , 'a:bz2' or 'a:xz' is not possible. As a workaround you can either use the uncompressed append mode 'a' and then handle the compression and decompression yourself, or you can handle the appending yourself and use the compressed read/write modes to recreate the tar archive. My question is: Why does it have to be this complicated? Is there any reason you can think of why the developers

问题 I have a mod_rails server where disk space, oddly enough, is at a premium. Is there a way for me to compress my application's source, like Python's zipimport? There are obvious disadvantages to this, so I should probably just break down and spend a nickel on disk space, but I figured it'd be worth a shot. 回答1: Oh, this is neat. Check out the rubyzip gem: rubyzip also features the zip/ziprequire.rb module (source) which allows ruby to load ruby modules from zip archives. ( Update : The

问题 I am wondering if anyone has tried using compression techniques for their LMDB files? Typically, lmdb files typically do not use any compression. I am wondering if anyone has successfully stored data in an lmdb using jpeg compression on lmdb and then used it for caffe. I need this because I am working on a developer board with very limited storage space. If so, can you please provide steps/code to do this? thanks 回答1: Caffe also supports HDF5 which supports compression. If your dataset is

问题 I have a a zipped file. That file contains various directories and files also. I want to extract all those and save in a specified path. So How to write a java program to extract the zipped file. Thanks Sunil Kumar Sahoo 回答1: You should look into using the java.util.zip package. Sun provides a tutorial on how to use it: Compressing and Decompressing Data Using Java APIs. 回答2: java.util.zip.* does the required thing. Go through the API for refernec. If you are looking for example LookThis 回答3:

问题 Are there any OSS compression libraries (gzip) available for J2ME? 回答1: Have a look at the TinyLine GZip library. Download link here. 回答2: software.informer.com/getfree-gzip-library-for-j2me/ swik.net/j2me+Library try this link you can download free here 回答3: Jazzlib-j2me (java.util.zip implementation in J2SE ported to J2ME) is available here: http://code.google.com/p/staff/downloads/list?q=jazzlib gzip and gunzip is supported. 回答4: The two compression algorithms which I have used for JavaME