122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 2000
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//
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// File: audownload.h
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//
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//--------------------------------------------------------------------------
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#pragma once
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#include "aucatitem.h"
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#include "aucatalog.h"
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#include <bits.h>
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#include <initguid.h>
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class Catalog;
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#define NO_BG_JOBSTATE -1
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#define CATMSG_DOWNLOAD_COMPLETE 1
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#define CATMSG_TRANSIENT_ERROR 2 //This comes from drizzle, for example if internet connection is lost
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#define CATMSG_DOWNLOAD_IN_PROGRESS 3
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#define CATMSG_DOWNLOAD_CANCELED 4
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#define CATMSG_DOWNLOAD_ERROR 5
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#define DRIZZLE_NOTIFY_FLAGS BG_NOTIFY_JOB_TRANSFERRED | BG_NOTIFY_JOB_ERROR | BG_NOTIFY_JOB_MODIFICATION
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typedef void (*DWNLDCALLBACK)(DWORD dwCallbackMsg, IBackgroundCopyJob *pBGJob, IBackgroundCopyError *pBGErr = NULL);
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typedef enum tagDRIZZLEOPS {
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DRIZZLEOPS_CANCEL = 1,
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DRIZZLEOPS_PAUSE ,
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DRIZZLEOPS_RESUME
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} DRIZZLEOPS;
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typedef enum tagJOBFINISHREASON {
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JOB_UNSPECIFIED_REASON = -1,
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JOB_ERROR = 0
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} JOBFINISHREASON;
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///////////////////////////////////////////////////////////////////////////
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// Wrapper class for drizzle download operation
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// also implements drizzle notification callbacks
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//////////////////////////////////////////////////////////////////////////
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class CAUDownloader : public IBackgroundCopyCallback
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{
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public:
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// IUnknown methods
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HRESULT STDMETHODCALLTYPE QueryInterface(
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/* [in] */ REFIID riid,
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/* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject);
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ULONG STDMETHODCALLTYPE AddRef( void);
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ULONG STDMETHODCALLTYPE Release( void);
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// IBackgroundCopyCallback methods
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HRESULT STDMETHODCALLTYPE JobTransferred(
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/* [in] */ IBackgroundCopyJob *pJob);
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HRESULT STDMETHODCALLTYPE JobError(
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/* [in] */ IBackgroundCopyJob *pJob,
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/* [in] */ IBackgroundCopyError *pError);
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HRESULT STDMETHODCALLTYPE JobModification(
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/* [in] */ IBackgroundCopyJob*,
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/* [in] */ DWORD );
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CAUDownloader(DWNLDCALLBACK pfnCallback):
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m_DownloadId(GUID_NULL),
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m_dwJobState(NO_BG_JOBSTATE),
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m_DoDownloadStatus(pfnCallback),
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m_refs(0),
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m_FinishReason(JOB_UNSPECIFIED_REASON)
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{};
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~CAUDownloader();
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HRESULT ContinueLastDownloadJob();
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//the following two could be combined into DownloadFiles() in V4
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HRESULT QueueDownloadFile(LPCTSTR pszServerUrl, // full http url
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LPCTSTR pszLocalFile // local file name
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);
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HRESULT StartDownload();
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HRESULT DrizzleOperation(DRIZZLEOPS);
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HRESULT getStatus(DWORD *percent, DWORD *pdwstatus);
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GUID getID()
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{
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return m_DownloadId;
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}
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void setID(const GUID & guid )
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{
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m_DownloadId = guid;
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}
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void Reset();
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JOBFINISHREASON m_FinishReason;
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private:
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HRESULT SetDrizzleNotifyInterface();
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HRESULT InitDownloadJob(const GUID & guidDownloadId);
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HRESULT ReconnectDownloadJob();
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HRESULT CreateDownloadJob(IBackgroundCopyJob ** ppjob);
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HRESULT FindDownloadJob(IBackgroundCopyJob ** ppjob);
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long m_refs;
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GUID m_DownloadId; // id what m_pjob points to.
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DWORD m_dwJobState; //Job State from drizzle, used in JobModification callback
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DWNLDCALLBACK m_DoDownloadStatus; //callback function to notify user of download state change
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// Friend functions (callbacks)
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friend void QueryFilesExistCallback(void*, long, LPCTSTR, LPCTSTR);
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};
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void DoDownloadStatus(DWORD dwDownloadMsg, IBackgroundCopyJob *pBGJob, IBackgroundCopyError *pBGErr);
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