Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Unicode C) Unzip One File to a StreamDemonstrates how to unzip a particular file contained within a .zip archive to a Chilkat stream.
#include <C_CkZipW.h> #include <C_CkZipEntryW.h> #include <C_CkStreamW.h> #include <C_CkTaskW.h> #include <C_CkStringBuilderW.h> void ChilkatSample(void) { HCkZipW zip; BOOL success; HCkZipEntryW entry; HCkStreamW streamA; HCkStreamW streamB; HCkTaskW unzipTask; HCkStringBuilderW sb; HCkStreamW streamC; const wchar_t *s; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. zip = CkZipW_Create(); // First open a .zip. success = CkZipW_OpenZip(zip,L"qa_data/hamlet.zip"); if (success != TRUE) { wprintf(L"%s\n",CkZipW_lastErrorText(zip)); CkZipW_Dispose(zip); return; } // Find the entry to be unzipped to a stream.. entry = CkZipW_FirstMatchingEntry(zip,L"*hamlet.xml"); if (CkZipW_getLastMethodSuccess(zip) != TRUE) { wprintf(L"%s\n",CkZipW_lastErrorText(zip)); CkZipW_Dispose(zip); return; } // There are three ways we can unzip (inflate) to a stream. // // 1) Set a sink file on the stream object and call UnzipToStream synchronously. // This unzips to the stream's sink (which is to simply unzip to a file in the filesystem). // // 2) Create a stream object and call UnzipToStreamAsync. This starts the unzip in a background // thread (after Task.Run is called). Your application can then read the unzipped (inflated) file // directly from the stream. // // 3) (not shown in this example) Unzip to a stream object that is the source of something else. // // ---------------------------------------------------------------- // Case 1: Unzip to a file by setting the sink of streamA to a file. streamA = CkStreamW_Create(); CkStreamW_putSinkFile(streamA,L"qa_output/hamletA.xml"); success = CkZipEntryW_UnzipToStream(entry,streamA); if (success != TRUE) { wprintf(L"%s\n",CkZipEntryW_lastErrorText(entry)); CkZipEntryW_Dispose(entry); CkZipW_Dispose(zip); CkStreamW_Dispose(streamA); return; } // Close the stream to close the output file. success = CkStreamW_WriteClose(streamA); // ---------------------------------------------------------------- // Case 2a: Uzip to a stream asynchronously. streamB = CkStreamW_Create(); unzipTask = CkZipEntryW_UnzipToStreamAsync(entry,streamB); if (CkZipEntryW_getLastMethodSuccess(entry) != TRUE) { wprintf(L"%s\n",CkZipEntryW_lastErrorText(entry)); CkZipEntryW_Dispose(entry); CkZipW_Dispose(zip); CkStreamW_Dispose(streamA); CkStreamW_Dispose(streamB); return; } // Start the background unzip thread. CkTaskW_Run(unzipTask); // Read the stream. (this is reading the unzipped file data) sb = CkStringBuilderW_Create(); while (CkStreamW_getEndOfStream(streamB) != TRUE) { // Each call to ReadSb appends to the contents of sb. CkStreamW_ReadSb(streamB,sb); } CkStringBuilderW_WriteFile(sb,L"qa_output/hamletB.xml",L"utf-8",FALSE); CkTaskW_Dispose(unzipTask); wprintf(L"Success.\n"); // ---------------------------------------------------------------- // Case 2b: Uzip to a stream asynchronously and emit output while reading. streamC = CkStreamW_Create(); unzipTask = CkZipEntryW_UnzipToStreamAsync(entry,streamC); if (CkZipEntryW_getLastMethodSuccess(entry) != TRUE) { wprintf(L"%s\n",CkZipEntryW_lastErrorText(entry)); CkZipEntryW_Dispose(entry); CkZipW_Dispose(zip); CkStreamW_Dispose(streamA); CkStreamW_Dispose(streamB); CkStringBuilderW_Dispose(sb); CkStreamW_Dispose(streamC); return; } CkTaskW_Run(unzipTask); while (CkStreamW_getEndOfStream(streamC) != TRUE) { s = CkStreamW_readString(streamC); wprintf(L"%s\n",s); } CkZipEntryW_Dispose(entry); CkTaskW_Dispose(unzipTask); wprintf(L"Success.\n"); CkZipW_Dispose(zip); CkStreamW_Dispose(streamA); CkStreamW_Dispose(streamB); CkStringBuilderW_Dispose(sb); CkStreamW_Dispose(streamC); } |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.