GetUrlCacheEntryInfo usage

Question

"GetUrlCacheEntryInfo"라는 함수가 제공 한 정보를 출력하려했지만 작동하지 않습니다. 디버그 로그의 문자 만 인쇄합니다. 모든 데이터를 올바르게 인쇄하려면 어떻게해야합니까?

Answer 1

여기는 작동하는 예제입니다. 캐시에있는 URL (https://h6.msn.com/library/8.8/dapmsn.js)입니다. IE를 사용하지 않았기 때문에 FindFirstUrlCacheEntry에 처음 도착했습니다. 왜 한 문자 만 인쇄 할 수 있는지 어쩌면 당신이 넓은 문자열 인쇄 기능을 사용하지 않는 것입니다. (아래 샘플에 std::cout 및 std::wcout의 사용 참조) 적절하게 인쇄해야하므로 lpszSourceUrlName 및 lpszLocalFileName 필드는 넓은 문자열 필드입니다.

#include <Windows.h> 
#include <Wininet.h> 

#include <memory> 

#pragma comment(lib, "Wininet.lib") 

#include <iostream> 

bool GetUrlCacheEntryInfo(const wchar_t* pUrl, std::unique_ptr<unsigned char[]>& pUrlCacheEntryInfo, DWORD nBufferSize = sizeof(INTERNET_CACHE_ENTRY_INFO)) 
{ 
    std::unique_ptr<unsigned char[]> pTemporaryUrlCacheEntryInfo(new unsigned char[nBufferSize]); 
    if (GetUrlCacheEntryInfo(pUrl, reinterpret_cast<LPINTERNET_CACHE_ENTRY_INFO>(pTemporaryUrlCacheEntryInfo.get()), &nBufferSize) == FALSE) 
    { 
     const DWORD nError = GetLastError(); 
     if (nError == ERROR_INSUFFICIENT_BUFFER) 
     { 
      pTemporaryUrlCacheEntryInfo.reset(new unsigned char[nBufferSize]); 
      if (GetUrlCacheEntryInfo(pUrl, reinterpret_cast<LPINTERNET_CACHE_ENTRY_INFO>(pTemporaryUrlCacheEntryInfo.get()), &nBufferSize) == FALSE) 
      { 
       return false; 
      } 
     } 
     else 
     { 
      return false; 
     } 
    } 
    pUrlCacheEntryInfo = std::move(pTemporaryUrlCacheEntryInfo); 
    return true; 
} 

void PrintUrlCacheEntryInfo(LPINTERNET_CACHE_ENTRY_INFO pUrlCacheEntryInfo) 
{ 
    std::cout << "Cache Entry Info:\n\tSize: " << pUrlCacheEntryInfo->dwStructSize << "\n\tUrl: "; 
    std::wcout << pUrlCacheEntryInfo->lpszSourceUrlName; 
    std::cout << "\n\tLocal File:"; 
    std::wcout << pUrlCacheEntryInfo->lpszLocalFileName; 
    std::cout << "\n\tType: "; 
    switch (pUrlCacheEntryInfo->CacheEntryType) 
    { 
    case EDITED_CACHE_ENTRY: 
     std::cout << "EDITED_CACHE_ENTRY"; 
     break; 
    case SPARSE_CACHE_ENTRY: 
     std::cout << "SPARSE_CACHE_ENTRY"; 
     break; 
    case STICKY_CACHE_ENTRY: 
     std::cout << "STICKY_CACHE_ENTRY"; 
     break; 
    case TRACK_OFFLINE_CACHE_ENTRY: 
     std::cout << "TRACK_OFFLINE_CACHE_ENTRY"; 
     break; 
    case TRACK_ONLINE_CACHE_ENTRY: 
     std::cout << "TRACK_ONLINE_CACHE_ENTRY"; 
     break; 
    default: 
     std::cout << "UNKNOWN"; 
     break; 
    } 
    std::cout << "\n\tHeaders: "; 
    std::wcout << pUrlCacheEntryInfo->lpHeaderInfo; 
    std::cout << "\n"; 
} 

int main(int argc, char** argv) 
{ 
    const wchar_t* pUrl = L"https://h6.msn.com/library/8.8/dapmsn.js"; 
    std::unique_ptr<unsigned char[]> pUrlCacheEntryInfo; 
    if (GetUrlCacheEntryInfo(pUrl, pUrlCacheEntryInfo)) 
    { 
     PrintUrlCacheEntryInfo(reinterpret_cast<LPINTERNET_CACHE_ENTRY_INFO>(pUrlCacheEntryInfo.get())); 
    } 
    else 
    { 
     std::wcout << L"Cache entry for url " << pUrl << L" was not found!\n"; 
    } 
    return EXIT_SUCCESS; 
}