zlib

extract zlib file in iOS?

由 心不动则不痛 提交于 2019-12-25 06:37:37
问题 When downloading data from a server thats compressed using zlib, I was wondering what steps are needed to take to uncompress and save to core data any help would be greatly appreciated 回答1: Use something like ASIHTTP to retrieve the file off the network. That can handle gzip which is likely what the data coming off the network is compressed with. If you'd prefer to roll your own, take a look at this zlib category on NSData: Has worked well for me in the past and likely does what you'll need.

How can I compress a char array into a compressed html page using Zlib

由 北城余情 提交于 2019-12-25 04:04:43
问题 I have a CGI application in C that creates an html page by saving a char* as a html page: void saveTextFile(const char *filename, const char *str){.......} called as saveTextFile("..\\index.html",outputFile); How do I use zlib to take as input the "outputFile" char array and output a zipped html page with appropriate headers? Would the gzopen be used here instead of my saveTextFile function? Any advice is appreciated. Thanks. 回答1: Got it - //***************************************************

C++ zLib compress byte array

由 泄露秘密 提交于 2019-12-25 03:49:18
问题 I want to compress a byte array with zlib and here is my code : void CGGCBotDlg::OnBnClickedButtonCompress() { // TODO: Add your control notification handler code here z_const char hello[] = "hello, hello!"; Byte *compr; uLong comprLen; int ReturnCode; uLong Length = (uLong)strlen(hello)+1; ReturnCode = compress(compr, &comprLen, (const Bytef*)hello, Length); } But ReturnCode always returns -2 (Z_STREAM_ERROR) I took this code directly from zlib example codes (example.c), it works on its own

Rails/Ruby invalid byte sequence in UTF-8 even after force_encoding

由 早过忘川 提交于 2019-12-25 03:45:28
问题 I'm trying to iterate over a remote nginx log file (compressed .gz file) in Rails and I'm getting this error at some point in the file: TTPArgumentError: invalid byte sequence in UTF-8 I tried forcing the encoding too although it seems the encoding was already UTF8: logfile = logfile.force_encoding("UTF-8") The method that I'm using: def remote_update uri = "http://" + self.url + "/localhost.access.log.2.gz" source = open(uri) gz = Zlib::GzipReader.new(source) logfile = gz.read # prints UTF-8

Error loading webpage while parsing JSON-string

由 ↘锁芯ラ 提交于 2019-12-25 02:53:12
问题 Please have a look at my code where I'm trying to compress data using connect.compress middleware. How can I parse JSON string in browser to get the decompressed data. When I try to hit localhost:2080 I'm getting Page loading error. Client code var options = { host: '127.0.0.1', port: 2080, path: "/", headers:{ 'accept-encoding': 'gzip' } }; var req = http.request(options, function(res) { console.log('STATUS: ' + res.statusCode); console.log('HEADERS: ' + JSON.stringify(res.headers)); var

Using zlib in Visual C++ project

由 一世执手 提交于 2019-12-25 02:29:44
问题 I've been struggling to compile my Visual C++ 2010 project with dependency of Zlib. I've got source code that worked on Linux and Mac OS X. Here's, where I have linker errors: error LNK2019: unresolved external symbol _inflate@8 referenced in function... error LNK2019: unresolved external symbol _inflateInit2_@16 referenced in function... error LNK2019: unresolved external symbol _deflate@8 referenced in function... error LNK2019: unresolved external symbol _deflateInit2_@32 referenced in

[c/c++] 借助zlib库读取.gz文件内容

由 烈酒焚心 提交于 2019-12-24 21:38:34
文件指针 struct gzFile_s { unsigned have ; unsigned char * next ; z_off64_t pos ; } ; typedef struct gzFile_s * gzFile ; 打开.gz文件 gzFile ZEXPORT gzopen ( path , mode ) const char * path ; const char * mode ; { . . . } path为文件路径，mode为打开模式，以只读模式打开.gz文件 fpgz = gzopen ( "./test.txt" , "r" ) ; 读取.gz文件内容 ZEXTERN char * ZEXPORT gzgets OF ( ( gzFile file , char * buf , int len ) ) ; 关闭.gz文件 ZEXTERN int ZEXPORT gzclose OF ( ( gzFile file ) ) ; 代码示例 gzFile fpgz = gzopen ( filepath , "r" ) ; if ( NULL == fpgz ) { printf ( "Open .gz file [%s] failed.\n" , filepath ) ; exit ( EXIT_FAILURE ) ; } char line [ 256

Building a fast PNG encoder issues

由 谁说我不能喝 提交于 2019-12-24 07:01:16
问题 I am trying to build a fast 8-bit greyscale PNG encoder. Unfortunately I must be misunderstanding part of the spec. Smaller image sizes seem to work, but the larger ones will only open in some image viewers. This image (with multiple DEFLATE Blocks) gives a "Decompression error in IDAT" error in my image viewer but opens fine in my browser: This image has just one DEFLATE block but also gives an error: Below I will outline what I put in my IDAT chunk in case you can easily spot any mistakes

Trying to compile program that uses zlib. Link unresolved error

由 青春壹個敷衍的年華 提交于 2019-12-24 06:45:17
问题 While trying to compile program, that uses zlib, i got following errors: Error 1 error LNK2019: unresolved external symbol _compress referenced in function "void __cdecl save_image_in_pakfile(class std::basic_ofstream > &,struct _IplImage *)" (?save_image_in_pakfile@@YAXAAV?$basic_ofstream@DU?$char_traits@D@std@@@std@@PAU_IplImage@@@Z) buffer_management.obj Error 2 error LNK2001: unresolved external symbol _compress fern_based_point_classifier.obj And two more same errors but related to

Is it possible to compress data in SQL Server using zlib?

由 橙三吉。 提交于 2019-12-24 05:23:28
问题 Is it possible to compress data (programmatically) in SQL Server using zlib compression? It's just one column in a specific table that needs compressing. I'm not a SQL Server person myself - I've tried to find if there's anything available but not had much joy. Thanks 来源： https://stackoverflow.com/questions/28324017/is-it-possible-to-compress-data-in-sql-server-using-zlib
订阅 zlib