使用zlib库解压*.zip文件

2024-02-21 22:58
文章标签 使用 zip 解压 zlib

本文主要是介绍使用zlib库解压*.zip文件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1.编辑zlib静态库

      1）实现zip文件压缩和解压的zlib库部分代码（基于zlib-1.2.5）

             这是zlib-1.2.5源码：http://download.csdn.net/download/sunxianliang1/9598009

             这是整理好的源代码（只是把需要的挑选出来，可以用vs编译成库使用）：http://download.csdn.net/download/sunxianliang1/9597996

      2）把以上整理好的代码编译成库待使用

2.zip文件的解压（支持多级目录）

1）ZipOperation.h

#ifndef ZIP_OPERATION_H
#define ZIP_OPERATION_H
#include "unzip.h"
#include <string>class ZipOperation
{
public:static bool Unzip();private:static void change_file_date(const char *filename, uLong dosdate, tm_unz tmu_date);static int mymkdir(const char* dirname);static int makedir(char *newdir);static void Display64BitsSize(ZPOS64_T n, int size_char);static int do_list(unzFile uf);static int do_extract_currentfile(unzFile uf, const int* popt_extract_without_path, int* popt_overwrite, const char* password);static int do_extract(unzFile uf, int opt_extract_without_path, int opt_overwrite, const char* password);static int do_extract_onefile(unzFile uf, const char* filename, int opt_extract_without_path, int opt_overwrite, const char* password);};#endif

2)ZipOperation.cpp

#include "ZipOperation.h"
#include <fstream>#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>
# include <direct.h>
# include <io.h>#define CASESENSITIVITY (0)
#define WRITEBUFFERSIZE (8192)
#define MAXFILENAME (256)#ifdef _WIN32
#define USEWIN32IOAPI
#include "iowin32.h"
#endifvoid ZipOperation::change_file_date(const char *filename, uLong dosdate, tm_unz tmu_date)
{
#ifdef _WIN32HANDLE hFile;FILETIME ftm, ftLocal, ftCreate, ftLastAcc, ftLastWrite;hFile = CreateFileA(filename, GENERIC_READ | GENERIC_WRITE,0, NULL, OPEN_EXISTING, 0, NULL);GetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);DosDateTimeToFileTime((WORD)(dosdate >> 16), (WORD)dosdate, &ftLocal);LocalFileTimeToFileTime(&ftLocal, &ftm);SetFileTime(hFile, &ftm, &ftLastAcc, &ftm);CloseHandle(hFile);
#else
#ifdef unixstruct utimbuf ut;struct tm newdate;newdate.tm_sec = tmu_date.tm_sec;newdate.tm_min = tmu_date.tm_min;newdate.tm_hour = tmu_date.tm_hour;newdate.tm_mday = tmu_date.tm_mday;newdate.tm_mon = tmu_date.tm_mon;if (tmu_date.tm_year > 1900)newdate.tm_year = tmu_date.tm_year - 1900;elsenewdate.tm_year = tmu_date.tm_year;newdate.tm_isdst = -1;ut.actime = ut.modtime = mktime(&newdate);utime(filename, &ut);
#endif
#endif
}/* mymkdir and change_file_date are not 100 % portable
As I don't know well Unix, I wait feedback for the unix portion */int ZipOperation::mymkdir(const char* dirname)
{int ret = 0;
#ifdef _WIN32ret = _mkdir(dirname);
#else
#ifdef unixret = mkdir(dirname, 0775);
#endif
#endifreturn ret;
}int ZipOperation::makedir(char *newdir)
{char *buffer;char *p;int  len = (int)strlen(newdir);if (len <= 0)return 0;buffer = (char*)malloc(len + 1);if (buffer == NULL){printf("Error allocating memory\n");return UNZ_INTERNALERROR;}strcpy(buffer, newdir);if (buffer[len - 1] == '/') {buffer[len - 1] = '\0';}if (mymkdir(buffer) == 0){free(buffer);return 1;}p = buffer + 1;while (1){char hold;while (*p && *p != '\\' && *p != '/')p++;hold = *p;*p = 0;if ((mymkdir(buffer) == -1) && (errno == ENOENT)){printf("couldn't create directory %s\n", buffer);free(buffer);return 0;}if (hold == 0)break;*p++ = hold;}free(buffer);return 1;
}void ZipOperation::Display64BitsSize(ZPOS64_T n, int size_char)
{/* to avoid compatibility problem , we do here the conversion */char number[21];int offset = 19;int pos_string = 19;number[20] = 0;for (;;) {number[offset] = (char)((n % 10) + '0');if (number[offset] != '0')pos_string = offset;n /= 10;if (offset == 0)break;offset--;}{int size_display_string = 19 - pos_string;while (size_char > size_display_string){size_char--;printf(" ");}}printf("%s", &number[pos_string]);
}int ZipOperation::do_list(unzFile uf)
{uLong i;unz_global_info64 gi;int err;err = unzGetGlobalInfo64(uf, &gi);if (err != UNZ_OK)printf("error %d with zipfile in unzGetGlobalInfo \n", err);printf("  Length  Method     Size Ratio   Date    Time   CRC-32     Name\n");printf("  ------  ------     ---- -----   ----    ----   ------     ----\n");for (i = 0; i<gi.number_entry; i++){char filename_inzip[256];unz_file_info64 file_info;uLong ratio = 0;const char *string_method;char charCrypt = ' ';err = unzGetCurrentFileInfo64(uf, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, NULL, 0);if (err != UNZ_OK){printf("error %d with zipfile in unzGetCurrentFileInfo\n", err);break;}if (file_info.uncompressed_size>0)ratio = (uLong)((file_info.compressed_size * 100) / file_info.uncompressed_size);/* display a '*' if the file is crypted */if ((file_info.flag & 1) != 0)charCrypt = '*';if (file_info.compression_method == 0)string_method = "Stored";elseif (file_info.compression_method == Z_DEFLATED){uInt iLevel = (uInt)((file_info.flag & 0x6) / 2);if (iLevel == 0)string_method = "Defl:N";else if (iLevel == 1)string_method = "Defl:X";else if ((iLevel == 2) || (iLevel == 3))string_method = "Defl:F"; /* 2:fast , 3 : extra fast*/}elseif (file_info.compression_method == Z_BZIP2ED){string_method = "BZip2 ";}elsestring_method = "Unkn. ";Display64BitsSize(file_info.uncompressed_size, 7);printf("  %6s%c", string_method, charCrypt);Display64BitsSize(file_info.compressed_size, 7);printf(" %3lu%%  %2.2lu-%2.2lu-%2.2lu  %2.2lu:%2.2lu  %8.8lx   %s\n",ratio,(uLong)file_info.tmu_date.tm_mon + 1,(uLong)file_info.tmu_date.tm_mday,(uLong)file_info.tmu_date.tm_year % 100,(uLong)file_info.tmu_date.tm_hour, (uLong)file_info.tmu_date.tm_min,(uLong)file_info.crc, filename_inzip);if ((i + 1)<gi.number_entry){err = unzGoToNextFile(uf);if (err != UNZ_OK){printf("error %d with zipfile in unzGoToNextFile\n", err);break;}}}return 0;
}int ZipOperation::do_extract_currentfile(unzFile uf, const int* popt_extract_without_path, int* popt_overwrite, const char* password)
{char filename_inzip[256];char* filename_withoutpath;char* p;int err = UNZ_OK;FILE *fout = NULL;void* buf;uInt size_buf;unz_file_info64 file_info;uLong ratio = 0;err = unzGetCurrentFileInfo64(uf, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, NULL, 0);if (err != UNZ_OK){printf("error %d with zipfile in unzGetCurrentFileInfo\n", err);return err;}size_buf = WRITEBUFFERSIZE;buf = (void*)malloc(size_buf);if (buf == NULL){printf("Error allocating memory\n");return UNZ_INTERNALERROR;}p = filename_withoutpath = filename_inzip;while ((*p) != '\0'){if (((*p) == '/') || ((*p) == '\\'))filename_withoutpath = p + 1;p++;}if ((*filename_withoutpath) == '\0'){if ((*popt_extract_without_path) == 0){printf("creating directory: %s\n", filename_inzip);mymkdir(filename_inzip);}}else{const char* write_filename;int skip = 0;if ((*popt_extract_without_path) == 0)write_filename = filename_inzip;elsewrite_filename = filename_withoutpath;err = unzOpenCurrentFilePassword(uf, password);if (err != UNZ_OK){printf("error %d with zipfile in unzOpenCurrentFilePassword\n", err);}if (((*popt_overwrite) == 0) && (err == UNZ_OK)){char rep = 0;FILE* ftestexist;ftestexist = fopen64(write_filename, "rb");if (ftestexist != NULL){fclose(ftestexist);do{char answer[128];int ret;printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ", write_filename);ret = scanf("%1s", answer);if (ret != 1){exit(EXIT_FAILURE);}rep = answer[0];if ((rep >= 'a') && (rep <= 'z'))rep -= 0x20;} while ((rep != 'Y') && (rep != 'N') && (rep != 'A'));}if (rep == 'N')skip = 1;if (rep == 'A')*popt_overwrite = 1;}if ((skip == 0) && (err == UNZ_OK)){fout = fopen64(write_filename, "wb");/* some zipfile don't contain directory alone before file */if ((fout == NULL) && ((*popt_extract_without_path) == 0) &&(filename_withoutpath != (char*)filename_inzip)){char c = *(filename_withoutpath - 1);*(filename_withoutpath - 1) = '\0';makedir(const_cast<char*>(write_filename));*(filename_withoutpath - 1) = c;fout = fopen64(write_filename, "wb");}if (fout == NULL){printf("error opening %s\n", write_filename);}}if (fout != NULL){printf(" extracting: %s\n", write_filename);do{err = unzReadCurrentFile(uf, buf, size_buf);if (err<0){printf("error %d with zipfile in unzReadCurrentFile\n", err);break;}if (err>0)if (fwrite(buf, err, 1, fout) != 1){printf("error in writing extracted file\n");err = UNZ_ERRNO;break;}} while (err>0);if (fout)fclose(fout);if (err == 0)change_file_date(write_filename, file_info.dosDate,file_info.tmu_date);}if (err == UNZ_OK){err = unzCloseCurrentFile(uf);if (err != UNZ_OK){printf("error %d with zipfile in unzCloseCurrentFile\n", err);}}elseunzCloseCurrentFile(uf); /* don't lose the error */}free(buf);return err;
}int ZipOperation::do_extract(unzFile uf, int opt_extract_without_path, int opt_overwrite, const char* password)
{uLong i;unz_global_info64 gi;int err;FILE* fout = NULL;err = unzGetGlobalInfo64(uf, &gi);if (err != UNZ_OK)printf("error %d with zipfile in unzGetGlobalInfo \n", err);for (i = 0; i<gi.number_entry; i++){if (do_extract_currentfile(uf, &opt_extract_without_path,&opt_overwrite,password) != UNZ_OK)break;if ((i + 1)<gi.number_entry){err = unzGoToNextFile(uf);if (err != UNZ_OK){printf("error %d with zipfile in unzGoToNextFile\n", err);break;}}}return 0;
}int ZipOperation::do_extract_onefile(unzFile uf, const char* filename, int opt_extract_without_path, int opt_overwrite, const char* password)
{int err = UNZ_OK;if (unzLocateFile(uf, filename, CASESENSITIVITY) != UNZ_OK){printf("file %s not found in the zipfile\n", filename);return 2;}if (do_extract_currentfile(uf, &opt_extract_without_path,&opt_overwrite,password) == UNZ_OK)return 0;elsereturn 1;
}bool ZipOperation::Unzip()
{const char *zipfilename = "E://a.zip"//压缩文件名const char *filename_to_extract=NULL;const char *password=NULL;//密码char filename_try[MAXFILENAME + 16] = "";int ret_value = 0;int opt_do_list = 0;int opt_do_extract = 1;int opt_do_extract_withoutpath = 0;int opt_overwrite = 1;int opt_extractdir = 1;const char *dirname = "E://";unzFile uf = NULL;#ifdef USEWIN32IOAPIzlib_filefunc64_def ffunc;
#endifstrncpy(filename_try, zipfilename, MAXFILENAME - 1);/* strncpy doesnt append the trailing NULL, of the string is too long. */filename_try[MAXFILENAME] = '\0';#ifdef USEWIN32IOAPIfill_win32_filefunc64A(&ffunc);uf = unzOpen2_64(zipfilename, &ffunc);
#elseuf = unzOpen64(zipfilename);
#endifif (uf == NULL){strcat(filename_try, ".zip");
#ifdef USEWIN32IOAPIuf = unzOpen2_64(filename_try, &ffunc);
#elseuf = unzOpen64(filename_try);
#endif}if (uf == NULL){printf("Cannot open %s or %s.zip\n", zipfilename, zipfilename);return false;}printf("%s opened\n", filename_try);if (opt_do_list == 1)ret_value = do_list(uf);else if (opt_do_extract == 1){
#ifdef _WIN32int ch = _chdir(dirname);if (opt_extractdir && ch)
#elseif (opt_extractdir && chdir(dirname))
#endif{printf("Error changing into %s, aborting\n", dirname);return false;}if (filename_to_extract == NULL)ret_value = do_extract(uf, opt_do_extract_withoutpath, opt_overwrite, password);elseret_value = do_extract_onefile(uf, filename_to_extract, opt_do_extract_withoutpath, opt_overwrite, password);}unzClose(uf);return true;
}

注意：解压功能就是根据源码zlib-1.2.5\contrib\minizip下的miniunz.c实现

3.压缩zip文件

       没有研究这个，不过想实现这个功能可以研究源码zlib-1.2.5\contrib\minizip下的minizip.c文件


                                    

                                        这篇关于使用zlib库解压*.zip文件的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
                                    

                                    

                                

                            

                            

                        

                    

                    

                        

                            

                            http://www.chinasem.cn/article/733339。
                            
                        

                    

                    
                    

                        
                            
                        
                    

                

                

                    相关文章
                

                    

                        

                            

                                

                                    
                                        使用Python实现IP地址和端口状态检测与监控
                                    
                                

                            

                            

                                

                                    使用Python实现IP地址和端口状态检测与监控
                                

                                

                                    《使用Python实现IP地址和端口状态检测与监控》在网络运维和服务器管理中,IP地址和端口的可用性监控是保障业务连续性的基础需求,本文将带你用Python从零打造一个高可用IP监控系统,感兴趣的小伙...																									目录概述：为什么需要IP监控系统使用步骤说明1. 环境准备2. 系统部署3. 核心功能配置系统效果展
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        使用Java将各种数据写入Excel表格的操作示例
                                    
                                

                            

                            

                                

                                    使用Java将各种数据写入Excel表格的操作示例
                                

                                

                                    《使用Java将各种数据写入Excel表格的操作示例》在数据处理与管理领域,Excel凭借其强大的功能和广泛的应用,成为了数据存储与展示的重要工具,在Java开发过程中,常常需要将不同类型的数据,本文...																									目录前言安装免费Java库1. 写入文本、或数值到 Excel单元格2. 写入数组到 Excel表格
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        redis中使用lua脚本的原理与基本使用详解
                                    
                                

                            

                            

                                

                                    redis中使用lua脚本的原理与基本使用详解
                                

                                

                                    《redis中使用lua脚本的原理与基本使用详解》在Redis中使用Lua脚本可以实现原子性操作、减少网络开销以及提高执行效率,下面小编就来和大家详细介绍一下在redis中使用lua脚本的原理...																									目录Redis 执行 Lua 脚本的原理基本使用方法使用EVAL命令执行 Lua 脚本使用EVALSHA命令
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        Java 中的 @SneakyThrows 注解使用方法(简化异常处理的利与弊)
                                    
                                

                            

                            

                                

                                    Java 中的 @SneakyThrows 注解使用方法(简化异常处理的利与弊)
                                

                                

                                    《Java中的@SneakyThrows注解使用方法(简化异常处理的利与弊)》为了简化异常处理,Lombok提供了一个强大的注解@SneakyThrows,本文将详细介绍@SneakyThro...																									目录1. @SneakyThrows 简介 1.1 什么是 Lombok？2. @SneakyThrows
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        使用Python和Pyecharts创建交互式地图
                                    
                                

                            

                            

                                

                                    使用Python和Pyecharts创建交互式地图
                                

                                

                                    《使用Python和Pyecharts创建交互式地图》在数据可视化领域,创建交互式地图是一种强大的方式,可以使受众能够以引人入胜且信息丰富的方式探索地理数据,下面我们看看如何使用Python和Pyec...																									目录简介Pyecharts 简介创建上海地图代码说明运行结果总结简介在数据可视化领域，创建交互式地
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        Java Stream流使用案例深入详解
                                    
                                

                            

                            

                                

                                    Java Stream流使用案例深入详解
                                

                                

                                    《JavaStream流使用案例深入详解》：本文主要介绍JavaStream流使用案例详解,本文通过实例代码给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友参考下吧...																									目录前言1. Lambda1.1 语法1.2 没参数只有一条语句或者多条语句1.3 一个参数只有一条语句或者多
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        Java Spring 中 @PostConstruct 注解使用原理及常见场景
                                    
                                

                            

                            

                                

                                    Java Spring 中 @PostConstruct 注解使用原理及常见场景
                                

                                

                                    《JavaSpring中@PostConstruct注解使用原理及常见场景》在JavaSpring中,@PostConstruct注解是一个非常实用的功能,它允许开发者在Spring容器完全初...																									目录一、@PostConstruct 注解概述二、@PostConstruct 注解的基本使用2.1 基本代
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        C#使用StackExchange.Redis实现分布式锁的两种方式介绍
                                    
                                

                            

                            

                                

                                    C#使用StackExchange.Redis实现分布式锁的两种方式介绍
                                

                                

                                    《C#使用StackExchange.Redis实现分布式锁的两种方式介绍》分布式锁在集群的架构中发挥着重要的作用,：本文主要介绍C#使用StackExchange.Redis实现分布式锁的...																									目录自定义分布式锁获取锁释放锁自动续期StackExchange.Redis分布式锁获取锁释放锁自动续期分布式
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        springboot使用Scheduling实现动态增删启停定时任务教程
                                    
                                

                            

                            

                                

                                    springboot使用Scheduling实现动态增删启停定时任务教程
                                

                                

                                    《springboot使用Scheduling实现动态增删启停定时任务教程》：本文主要介绍springboot使用Scheduling实现动态增删启停定时任务教程,具有很好的参考价值,希望对大家有...																									目录1、配置定时任务需要的线程池2、创建ScheduledFuture的包装类3、注册定时任务，增加、删
                                

                                

                                    阅读更多...
                                

                            

                        

                    

                    

                        

                            

                                

                                    
                                        使用Python实现矢量路径的压缩、解压与可视化
                                    
                                

                            

                            

                                

                                    使用Python实现矢量路径的压缩、解压与可视化
                                

                                

                                    《使用Python实现矢量路径的压缩、解压与可视化》在图形设计和Web开发中,矢量路径数据的高效存储与传输至关重要,本文将通过一个Python示例,展示如何将复杂的矢量路径命令序列压缩为JSON格式,...																									目录引言核心功能概述1. 路径命令解析2. 路径数据压缩3. 路径数据解压4. 可视化代码实现详解1
                                

                                

                                    阅读更多...
                                

                            

                        

                    

            

        

    


    


    

        

            Copyright China编程   23002807@qq.com
        

        

            沪ICP备2023033072号-2