使用c++解压rar文件，基于UnRAR64，非命令行

秋月的私语2023-11-07 19:00

最近项目需要解压缩rar文件，我们都知道rar是闭源收费软件，如果直接采用命令行可能会有限制，或者盗版问题，使用正版的winrar命令行解压rar文件是否有限制，这个我没来得及测试，但是从交互体验上来说，命令行对于很多情况的处理也不太友好，比如是否出错，比如异常处理，甚至某些高级功能，比如自定义解压缩的文件名等等，这些在命令行中不太好实现甚至无法实现。

网上很多关于c++解压rar的代码都是基于命令行的，这不是我想要的。

我想找能够解压rar的库或者dll，经过一番寻找，发现rarlab官网已经提供了UnRAR64，可以直接下载运行，这里提供一下下载地址：https://www.rarlab.com/rar/unrardll-624.exehttps://www.rarlab.com/rar/unrardll-624.exe

其他版本在这个页面：WinRAR archiver, a powerful tool to process RAR and ZIP fileshttps://www.rarlab.com/rar_add.htm

使用官方的例子，即可实现winrar的解压缩，不过为了方便使用，我拓展了一下官方的代码，可以实现列出文件和解压缩rar文件到指定的目录，修改比较简单，这里直接上代码：

cpp 复制代码 
#pragma once


#include <windows.h>
#include <stdio.h>
#include <ctype.h>
#include <locale.h>
#include <vector>

#include "unrar.h"

enum { EXTRACT, TEST, PRINT, LIST };

int CommandLine(int Argc, char *Argv[]);

void ExtractArchive(char *ArcName,int Mode);
void ExtractArchive(char *ArcName, char* DstDir);
void ListArchive(char *ArcName);
size_t ListArchive(char *ArcName, std::vector<std::string>& vFiles);
void ShowComment(wchar_t *CmtBuf);
void OutHelp(void);

enum ERR_TYPE {ERR_OPEN, ERR_READ, ERR_PROCESS};
void OutError(int Error,char *ArcName,int ErrType);

void ShowArcInfo(unsigned int Flags,char *ArcName);
void PrintTime(const char *Label,unsigned int Low,unsigned int High);
void OutProcessFileError(int Error);
int CALLBACK CallbackProc(UINT msg,LPARAM UserData,LPARAM P1,LPARAM P2);

实现文件：

cpp 复制代码 
#define STRICT

#include "UnRDLL.h"

int CommandLine(int Argc, char *Argv[])
{
  setlocale(LC_ALL, NULL);

  if (Argc!=3)
  {
    OutHelp();
    return(0);
  }

  switch(toupper(Argv[1][0]))
  {
    case 'X':
      ExtractArchive(Argv[2],EXTRACT);
      break;
    case 'T':
      ExtractArchive(Argv[2],TEST);
      break;
    case 'P':
      ExtractArchive(Argv[2],PRINT);
      break;
    case 'L':
      ListArchive(Argv[2]);
      break;
    default:
      OutHelp();
      return(0);
  }

  return(0);
}


void ExtractArchive(char *ArcName,int Mode)
{
  HANDLE hArcData;
  int RHCode,PFCode;
  wchar_t CmtBuf[16384];
  struct RARHeaderData HeaderData;
  struct RAROpenArchiveDataEx OpenArchiveData;

  memset(&HeaderData,0,sizeof(HeaderData));
  memset(&OpenArchiveData,0,sizeof(OpenArchiveData));

  OpenArchiveData.ArcName=ArcName;
  OpenArchiveData.CmtBufW=CmtBuf;
  OpenArchiveData.CmtBufSize=sizeof(CmtBuf)/sizeof(CmtBuf[0]);
  OpenArchiveData.OpenMode=RAR_OM_EXTRACT;
  OpenArchiveData.Callback=CallbackProc;
  OpenArchiveData.UserData=Mode;
  hArcData=RAROpenArchiveEx(&OpenArchiveData);

  if (OpenArchiveData.OpenResult!=0)
  {
    OutError(OpenArchiveData.OpenResult,ArcName,ERR_OPEN);
    return;
  }

  ShowArcInfo(OpenArchiveData.Flags,ArcName);

  if (OpenArchiveData.CmtState==1)
    ShowComment(CmtBuf);

  while ((RHCode=RARReadHeader(hArcData,&HeaderData))==0)
  {
    switch(Mode)
    {
      case EXTRACT:
        printf("\nExtracting %-45s",HeaderData.FileName);
        break;
      case TEST:
        printf("\nTesting %-45s",HeaderData.FileName);
        break;
      case PRINT:
        printf("\nPrinting %-45s\n",HeaderData.FileName);
        break;
    }
    PFCode=RARProcessFile(hArcData,(Mode==EXTRACT) ? RAR_EXTRACT:RAR_TEST,
                          NULL,NULL);
    if (PFCode==0)
      printf(" OK");
    else
    {
      OutError(PFCode,ArcName,ERR_PROCESS);
      break;
    }
  }

  OutError(RHCode,ArcName,ERR_READ);

  RARCloseArchive(hArcData);
}


void ExtractArchive(char *ArcName, char* DstDir)
{
	HANDLE hArcData;
	int RHCode,PFCode;
	wchar_t CmtBuf[16384];
	struct RARHeaderData HeaderData;
	struct RAROpenArchiveDataEx OpenArchiveData;

	memset(&HeaderData,0,sizeof(HeaderData));
	memset(&OpenArchiveData,0,sizeof(OpenArchiveData));

	OpenArchiveData.ArcName=ArcName;
	OpenArchiveData.CmtBufW=CmtBuf;
	OpenArchiveData.CmtBufSize=sizeof(CmtBuf)/sizeof(CmtBuf[0]);
	OpenArchiveData.OpenMode=RAR_OM_EXTRACT;
	OpenArchiveData.Callback=CallbackProc;
	OpenArchiveData.UserData= EXTRACT;
	hArcData=RAROpenArchiveEx(&OpenArchiveData);

	if (OpenArchiveData.OpenResult!=0)
	{
		OutError(OpenArchiveData.OpenResult,ArcName,ERR_OPEN);
		return;
	}

	ShowArcInfo(OpenArchiveData.Flags,ArcName);

	if (OpenArchiveData.CmtState==1)
		ShowComment(CmtBuf);

	while ((RHCode=RARReadHeader(hArcData,&HeaderData))==0)
	{
		printf("\nExtracting %-45s",HeaderData.FileName);
		PFCode=RARProcessFile(hArcData,RAR_EXTRACT,DstDir,NULL);
		if (PFCode==0)
			printf(" OK");
		else
		{
			OutError(PFCode,ArcName,ERR_PROCESS);
			break;
		}
	}

	OutError(RHCode,ArcName,ERR_READ);

	RARCloseArchive(hArcData);
}

size_t ListArchive(char *ArcName, std::vector<std::string>& vFiles)
{
  HANDLE hArcData;
  int RHCode,PFCode;
  wchar_t CmtBuf[16384];
  struct RARHeaderDataEx HeaderData;
  struct RAROpenArchiveDataEx OpenArchiveData;
  wchar_t RedirName[1024];

  memset(&HeaderData,0,sizeof(HeaderData));
  memset(&OpenArchiveData,0,sizeof(OpenArchiveData));
  OpenArchiveData.ArcName=ArcName;
  OpenArchiveData.CmtBufW=CmtBuf;
  OpenArchiveData.CmtBufSize=sizeof(CmtBuf)/sizeof(CmtBuf[0]);
  OpenArchiveData.OpenMode=RAR_OM_LIST;
  OpenArchiveData.Callback=CallbackProc;
  OpenArchiveData.UserData=LIST;
  hArcData=RAROpenArchiveEx(&OpenArchiveData);

  if (OpenArchiveData.OpenResult!=0)
  {
    OutError(OpenArchiveData.OpenResult,ArcName,ERR_OPEN);
    return 0;
  }

  ShowArcInfo(OpenArchiveData.Flags,ArcName);

  if (OpenArchiveData.CmtState==1)
    ShowComment(CmtBuf);

  HeaderData.RedirName=RedirName;
  HeaderData.RedirNameSize=sizeof(RedirName)/sizeof(RedirName[0]);
  while ((RHCode=RARReadHeaderEx(hArcData,&HeaderData))==0)
  {
    __int64 UnpSize=HeaderData.UnpSize+(((__int64)HeaderData.UnpSizeHigh)<<32);
    __int64 PackSize=HeaderData.PackSize+(((__int64)HeaderData.PackSizeHigh)<<32);
    printf("\nName:   %s",HeaderData.FileName);

	vFiles.push_back(HeaderData.FileName);

    printf("\nSize:   %lld ",UnpSize);
    printf("\nPacked: %lld ",PackSize);

    PrintTime("mtime",HeaderData.MtimeLow,HeaderData.MtimeHigh);
    PrintTime("ctime",HeaderData.CtimeLow,HeaderData.CtimeHigh);
    PrintTime("atime",HeaderData.AtimeLow,HeaderData.AtimeHigh);

    if (HeaderData.RedirType!=0)
      printf("\n\tlink type %d, target %ls",HeaderData.RedirType,HeaderData.RedirName);
    if ((PFCode=RARProcessFile(hArcData,RAR_SKIP,NULL,NULL))!=0)
    {
      OutError(PFCode,ArcName,ERR_PROCESS);
      break;
    }
    printf("\n");
  }

  OutError(RHCode,ArcName,ERR_READ);

  RARCloseArchive(hArcData);

  return vFiles.size();
}

void ListArchive(char *ArcName)
{
  HANDLE hArcData;
  int RHCode,PFCode;
  wchar_t CmtBuf[16384];
  struct RARHeaderDataEx HeaderData;
  struct RAROpenArchiveDataEx OpenArchiveData;
  wchar_t RedirName[1024];

  memset(&HeaderData,0,sizeof(HeaderData));
  memset(&OpenArchiveData,0,sizeof(OpenArchiveData));
  OpenArchiveData.ArcName=ArcName;
  OpenArchiveData.CmtBufW=CmtBuf;
  OpenArchiveData.CmtBufSize=sizeof(CmtBuf)/sizeof(CmtBuf[0]);
  OpenArchiveData.OpenMode=RAR_OM_LIST;
  OpenArchiveData.Callback=CallbackProc;
  OpenArchiveData.UserData=LIST;
  hArcData=RAROpenArchiveEx(&OpenArchiveData);

  if (OpenArchiveData.OpenResult!=0)
  {
    OutError(OpenArchiveData.OpenResult,ArcName,ERR_OPEN);
    return;
  }

  ShowArcInfo(OpenArchiveData.Flags,ArcName);

  if (OpenArchiveData.CmtState==1)
    ShowComment(CmtBuf);

  HeaderData.RedirName=RedirName;
  HeaderData.RedirNameSize=sizeof(RedirName)/sizeof(RedirName[0]);
  while ((RHCode=RARReadHeaderEx(hArcData,&HeaderData))==0)
  {
    __int64 UnpSize=HeaderData.UnpSize+(((__int64)HeaderData.UnpSizeHigh)<<32);
    __int64 PackSize=HeaderData.PackSize+(((__int64)HeaderData.PackSizeHigh)<<32);
    printf("\nName:   %s",HeaderData.FileName);
    printf("\nSize:   %lld ",UnpSize);
    printf("\nPacked: %lld ",PackSize);

    PrintTime("mtime",HeaderData.MtimeLow,HeaderData.MtimeHigh);
    PrintTime("ctime",HeaderData.CtimeLow,HeaderData.CtimeHigh);
    PrintTime("atime",HeaderData.AtimeLow,HeaderData.AtimeHigh);

    if (HeaderData.RedirType!=0)
      printf("\n\tlink type %d, target %ls",HeaderData.RedirType,HeaderData.RedirName);
    if ((PFCode=RARProcessFile(hArcData,RAR_SKIP,NULL,NULL))!=0)
    {
      OutError(PFCode,ArcName,ERR_PROCESS);
      break;
    }
    printf("\n");
  }

  OutError(RHCode,ArcName,ERR_READ);

  RARCloseArchive(hArcData);
}


void ShowComment(wchar_t *CmtBuf)
{
  printf("\nComment:\n%ls\n",CmtBuf);
}


void OutHelp(void)
{
  printf("\nUNRDLL.   This is a simple example of UNRAR.DLL usage\n");
  printf("\nSyntax:\n");
  printf("\nUNRDLL X <Archive>     extract archive contents");
  printf("\nUNRDLL T <Archive>     test archive contents");
  printf("\nUNRDLL P <Archive>     print archive contents to stdout");
  printf("\nUNRDLL L <Archive>     view archive contents\n");
}


void OutError(int Error,char *ArcName,int ErrType)
{
  switch(Error)
  {
    case ERAR_NO_MEMORY:
      printf("\nNot enough memory");
      break;
    case ERAR_BAD_DATA:
      printf("\n%s: archive header or data are damaged",ArcName);
      break;
    case ERAR_BAD_ARCHIVE:
      printf("\n%s is not RAR archive",ArcName);
      break;
    case ERAR_UNKNOWN_FORMAT:
      printf("Unknown archive format");
      break;
    case ERAR_EOPEN:
      if (ErrType==ERR_PROCESS) // Returned by RARProcessFile.
        printf("Volume open error");
      else
        printf("\nCannot open %s",ArcName);
      break;
    case ERAR_ECREATE:
      printf("File create error");
      break;
    case ERAR_ECLOSE:
      printf("File close error");
      break;
    case ERAR_EREAD:
      printf("Read error");
      break;
    case ERAR_EWRITE:
      printf("Write error");
      break;
    case ERAR_SMALL_BUF:
      printf("Buffer for archive comment is too small, comment truncated");
      break;
    case ERAR_UNKNOWN:
      printf("Unknown error");
      break;
    case ERAR_MISSING_PASSWORD:
      printf("Password for encrypted file or header is not specified");
      break;
    case ERAR_EREFERENCE:
      printf("Cannot open file source for reference record");
      break;
    case ERAR_BAD_PASSWORD:
      printf("Wrong password is specified");
      break;
  }
}


void ShowArcInfo(unsigned int Flags,char *ArcName)
{
  printf("\nArchive %s\n",ArcName);
  printf("\nVolume:\t\t%s",(Flags & 1) ? "yes":"no");
  printf("\nComment:\t%s",(Flags & 2) ? "yes":"no");
  printf("\nLocked:\t\t%s",(Flags & 4) ? "yes":"no");
  printf("\nSolid:\t\t%s",(Flags & 8) ? "yes":"no");
  printf("\nNew naming:\t%s",(Flags & 16) ? "yes":"no");
  printf("\nRecovery:\t%s",(Flags & 64) ? "yes":"no");
  printf("\nEncr.headers:\t%s",(Flags & 128) ? "yes":"no");
  printf("\nFirst volume:\t%s",(Flags & 256) ? "yes":"no or older than 3.0");
  printf("\n---------------------------\n");
}


void PrintTime(const char *Label,unsigned int Low,unsigned int High)
{
  if (Low!=0 || High!=0)
  {
    FILETIME ft;
    ft.dwLowDateTime=Low;
    ft.dwHighDateTime=High;
    SYSTEMTIME ust,st;
    FileTimeToSystemTime(&ft,&ust);
    SystemTimeToTzSpecificLocalTime(NULL,&ust,&st);
    printf("\n%s:  %u-%02u-%02u %02u:%02u:%02u,%03u",Label,st.wYear,st.wMonth,
           st.wDay,st.wHour,st.wMinute,st.wSecond,st.wMilliseconds);
  }
}


int CALLBACK CallbackProc(UINT msg,LPARAM UserData,LPARAM P1,LPARAM P2)
{
  switch(msg)
  {
    case UCM_CHANGEVOLUMEW:
      if (P2==RAR_VOL_ASK)
      {
        printf("\n\nVolume %S is required\nPossible options:\n",(wchar_t *)P1);
        printf("\nEnter - try again");
        printf("\n'R'   - specify a new volume name");
        printf("\n'Q'   - quit");
        printf("\nEnter your choice: ");
        switch(toupper(getchar()))
        {
          case 'Q':
            return(-1);
          case 'R':
            {
              wchar_t *eol;
              printf("\nEnter new name: ");
              fflush(stdin);

              // fgetws may fail to read non-English characters from stdin
              // in some compilers. In this case use something more
              // appropriate for Unicode input.
              fgetws((wchar_t *)P1,MAX_PATH,stdin);

              eol=wcspbrk((wchar_t *)P1,L"\r\n");
              if (eol!=NULL)
                *eol=0;
            }
            return(1);
          default:
            return(1);
        }
      }
      if (P2==RAR_VOL_NOTIFY)
        printf("\n  ... volume %S\n",(wchar_t *)P1);
      return(1);
    case UCM_PROCESSDATA:
      if (UserData==PRINT)
      {
        fflush(stdout);
        fwrite((char *)P1,1,P2,stdout);
        fflush(stdout);
      }
      return(1);
    case UCM_NEEDPASSWORDW:
      {
        wchar_t *eol;
        printf("\nPassword required: ");
   
        // fgetws may fail to read non-English characters from stdin
        // in some compilers. In this case use something more appropriate
        // for Unicode input.
        fgetws((wchar_t *)P1,(int)P2,stdin);

        eol=wcspbrk((wchar_t *)P1,L"\r\n");
        if (eol!=NULL)
          *eol=0;
      }
      return(1);
  }
  return(0);
}
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