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#include "stdafx.h" |
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#include "AsyncHttpFile.h" |
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#define FORCE_TIMEOUT 60000 |
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using details::CONTEXT_REQUEST; |
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CAsyncHttpFile::CAsyncHttpFile() : |
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m_hInternet(NULL), |
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m_hOpenUrl(NULL), |
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m_dwExpectedState(0), |
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m_hFinishedEvent(NULL), |
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m_dwError(ERROR_SUCCESS) |
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{ |
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memset(&m_internetBuffers, 0, sizeof(INTERNET_BUFFERS)); |
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m_tOpenRequest.pHttpFile = this; |
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m_tOpenRequest.eOperationType = CONTEXT_REQUEST::eInternetOpenUrl; |
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m_tReadRequest.pHttpFile = this; |
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m_tReadRequest.eOperationType = CONTEXT_REQUEST::eInternetReadFileEx; |
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} |
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CAsyncHttpFile::~CAsyncHttpFile() |
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{ |
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Close(); |
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} |
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HRESULT CAsyncHttpFile::Open(const wchar_t* pszPath, const wchar_t* pszUserAgent, const wchar_t* pszHeaders) |
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{ |
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if(!pszPath) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_INVALIDARG; |
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} |
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if(m_hInternet || m_hFinishedEvent) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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SetErrorCode(ERROR_SUCCESS); |
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m_hFinishedEvent = ::CreateEvent(NULL, FALSE, FALSE, NULL); |
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if(!m_hFinishedEvent) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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m_hInternet = ::InternetOpen(pszUserAgent, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, INTERNET_FLAG_ASYNC); |
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if(!m_hInternet) |
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{ |
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SetErrorCode(GetLastError()); |
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::CloseHandle(m_hFinishedEvent); |
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m_hFinishedEvent = NULL; |
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return E_FAIL; |
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} |
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if(::InternetSetStatusCallback(m_hInternet, (INTERNET_STATUS_CALLBACK)&CAsyncHttpFile::InternetStatusCallback) == INTERNET_INVALID_STATUS_CALLBACK) |
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{ |
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SetErrorCode(GetLastError()); |
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::InternetCloseHandle(m_hInternet); |
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::CloseHandle(m_hFinishedEvent); |
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m_hFinishedEvent = NULL; |
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return E_FAIL; |
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} |
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m_dwExpectedState = INTERNET_STATUS_REQUEST_COMPLETE; |
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HINTERNET hOpenUrl = ::InternetOpenUrl(m_hInternet, pszPath, pszHeaders, (DWORD)-1, INTERNET_FLAG_NO_COOKIES | INTERNET_FLAG_NO_UI | INTERNET_FLAG_PRAGMA_NOCACHE | INTERNET_FLAG_RELOAD, (DWORD_PTR)&m_tOpenRequest); |
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if(!hOpenUrl) |
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{ |
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SetErrorCode(::GetLastError()); |
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if(GetErrorCode() != ERROR_IO_PENDING) |
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{ |
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::InternetSetStatusCallback(m_hInternet, NULL); |
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::InternetCloseHandle(m_hInternet); |
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::CloseHandle(m_hFinishedEvent); |
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m_hInternet = NULL; |
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m_hFinishedEvent = NULL; |
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m_dwExpectedState = 0; |
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return E_FAIL; |
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} |
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} |
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else |
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{ |
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m_dwExpectedState = 0; |
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::SetEvent(m_hFinishedEvent); |
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} |
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return hOpenUrl ? S_OK : S_FALSE; |
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} |
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HRESULT CAsyncHttpFile::GetFileSize(size_t& stSize) |
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{ |
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if(!m_hInternet || !m_hOpenUrl) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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DWORD dwContentLengthSize = sizeof(DWORD); |
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if(!HttpQueryInfo(m_hOpenUrl, HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER, &stSize, &dwContentLengthSize, NULL) || stSize == 0 || stSize > 1 * 1024UL * 1024UL) |
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{ |
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stSize = 65536; |
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return S_FALSE; |
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} |
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return S_OK; |
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} |
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HRESULT CAsyncHttpFile::RequestData(void* pBuffer, size_t stSize) |
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{ |
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if(!pBuffer) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_INVALIDARG; |
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} |
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if(!m_hInternet || !m_hOpenUrl || !m_hFinishedEvent) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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SetErrorCode(ERROR_SUCCESS); |
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if(!::ResetEvent(m_hFinishedEvent)) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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memset(&m_internetBuffers, 0, sizeof(INTERNET_BUFFERS)); |
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m_internetBuffers.dwStructSize = sizeof(INTERNET_BUFFERS); |
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m_internetBuffers.dwBufferLength = (DWORD)stSize; |
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m_internetBuffers.dwBufferTotal = (DWORD)stSize; |
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m_internetBuffers.lpvBuffer = pBuffer; |
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m_dwExpectedState = INTERNET_STATUS_REQUEST_COMPLETE; |
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if(!::InternetReadFileEx(m_hOpenUrl, &m_internetBuffers, IRF_NO_WAIT, (DWORD_PTR)&m_tReadRequest)) |
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{ |
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SetErrorCode(::GetLastError()); |
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if(GetErrorCode() == ERROR_IO_PENDING) |
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return S_FALSE; |
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else |
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return E_FAIL; |
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} |
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if(!::SetEvent(m_hFinishedEvent)) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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return S_OK; |
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} |
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HRESULT CAsyncHttpFile::GetRetrievedDataSize(size_t& stSize) |
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{ |
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if(!m_hInternet) |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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stSize = m_internetBuffers.dwBufferLength; |
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return S_OK; |
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} |
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HRESULT CAsyncHttpFile::Close() |
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{ |
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SetErrorCode(ERROR_SUCCESS); |
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if(m_hOpenUrl) |
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{ |
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m_dwExpectedState = INTERNET_STATUS_CLOSING_CONNECTION; |
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if(!::InternetCloseHandle(m_hOpenUrl)) |
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{ |
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SetErrorCode(::GetLastError()); |
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if(GetErrorCode() == ERROR_IO_PENDING) |
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return S_FALSE; |
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else |
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{ |
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SetErrorCode(ERROR_INTERNAL_ERROR); |
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return E_FAIL; |
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} |
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} |
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m_dwExpectedState = 0; |
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SetUrlHandle(NULL); |
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::InternetCloseHandle(m_hInternet); |
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} |
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if(m_hFinishedEvent) |
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{ |
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::CloseHandle(m_hFinishedEvent); |
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m_hFinishedEvent = NULL; |
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} |
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return S_OK; |
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} |
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CAsyncHttpFile::EWaitResult CAsyncHttpFile::GetResult() |
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{ |
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HANDLE hHandles[] = { m_hFinishedEvent }; |
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DWORD dwEffect = WaitForMultipleObjects(1, hHandles, FALSE, 0); |
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if(dwEffect == WAIT_OBJECT_0 + 0 || dwEffect == WAIT_ABANDONED_0 + 0) |
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return GetErrorCode() == ERROR_SUCCESS ? CAsyncHttpFile::eFinished : CAsyncHttpFile::eError; |
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else |
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return CAsyncHttpFile::ePending; |
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} |
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CAsyncHttpFile::EWaitResult CAsyncHttpFile::WaitForResult(HANDLE hKillEvent) |
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{ |
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HANDLE hHandles[] = { hKillEvent, m_hFinishedEvent }; |
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DWORD dwEffect = WaitForMultipleObjects(2, hHandles, FALSE, FORCE_TIMEOUT); |
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if(dwEffect == 0xffffffff) |
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{ |
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SetErrorCode(::GetLastError()); |
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return CAsyncHttpFile::eError; |
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} |
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else if(dwEffect == WAIT_OBJECT_0 + 0 || dwEffect == WAIT_ABANDONED_0 + 0) |
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return CAsyncHttpFile::eKilled; |
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else if(dwEffect == WAIT_OBJECT_0 + 1 || dwEffect == WAIT_ABANDONED_0 + 1) |
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return GetErrorCode() == ERROR_SUCCESS ? CAsyncHttpFile::eFinished : CAsyncHttpFile::eError; |
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else |
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return CAsyncHttpFile::eTimeout; |
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} |
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void CALLBACK CAsyncHttpFile::InternetStatusCallback(HINTERNET hInternet, DWORD_PTR dwContext, DWORD dwInternetStatus, LPVOID lpvStatusInformation, DWORD dwStatusInformationLength) |
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{ |
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CONTEXT_REQUEST* pRequest = (CONTEXT_REQUEST*)dwContext; |
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BOOST_ASSERT(pRequest && pRequest->pHttpFile); |
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if(!pRequest || !pRequest->pHttpFile) |
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return; |
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CString strMsg; |
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strMsg.Format(_T("[CAsyncHttpFile::InternetStatusCallback] hInternet: %p, dwContext: %lu (operation: %lu), dwInternetStatus: %lu, lpvStatusInformation: %p, dwStatusInformationLength: %lu\n"), |
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hInternet, dwContext, pRequest ? pRequest->eOperationType : CONTEXT_REQUEST::eNone, dwInternetStatus, lpvStatusInformation, dwStatusInformationLength); |
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LOG_DEBUG(strMsg); |
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switch(dwInternetStatus) |
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{ |
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case INTERNET_STATUS_HANDLE_CREATED: |
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{ |
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INTERNET_ASYNC_RESULT* pRes = (INTERNET_ASYNC_RESULT*)lpvStatusInformation; |
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pRequest->pHttpFile->SetUrlHandle((HINTERNET)(pRes->dwResult)); |
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break; |
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} |
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case INTERNET_STATUS_RESPONSE_RECEIVED: |
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{ |
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ATLTRACE(_T("INTERNET_STATUS_RESPONSE_RECEIVED; received %lu bytes."), *(DWORD*)lpvStatusInformation); |
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break; |
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} |
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case INTERNET_STATUS_REQUEST_COMPLETE: |
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{ |
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INTERNET_ASYNC_RESULT* pResult = (INTERNET_ASYNC_RESULT*)lpvStatusInformation; |
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pRequest->pHttpFile->SetErrorCode(pResult->dwError); |
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break; |
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} |
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case INTERNET_STATUS_CLOSING_CONNECTION: |
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{ |
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pRequest->pHttpFile->SetUrlHandle(NULL); |
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break; |
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} |
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case INTERNET_STATUS_CONNECTION_CLOSED: |
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{ |
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break; |
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} |
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default: |
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TRACE(_T("[CAsyncHttpFile::InternetStatusCallback()] Unhandled status: %lu\n"), dwInternetStatus); |
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} |
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pRequest->pHttpFile->SetCompletionStatus(dwInternetStatus); |
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} |
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void CAsyncHttpFile::SetUrlHandle(HANDLE hOpenUrl) |
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{ |
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m_hOpenUrl = hOpenUrl; |
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} |
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void CAsyncHttpFile::SetErrorCode(DWORD dwError) |
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{ |
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m_dwError = dwError; |
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} |
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419 |
|
| |
|
420 |
HRESULT CAsyncHttpFile::SetCompletionStatus(DWORD dwCurrentState) |
| |
|
421 |
{ |
| |
|
422 |
if(!m_hFinishedEvent) |
| |
|
423 |
return E_FAIL; |
| |
|
424 |
|
| |
|
425 |
if(dwCurrentState == m_dwExpectedState || dwCurrentState == INTERNET_STATUS_CLOSING_CONNECTION) |
| |
|
426 |
return ::SetEvent(m_hFinishedEvent) ? S_OK : E_FAIL; |
| |
|
427 |
return S_FALSE; |
| |
|
428 |
} |