git.oblomov.eu Git - wine/blob - dlls/urlmon/umstream.c

   1 /*
   2  * Based on ../shell32/memorystream.c
   3  *
   4  * Copyright 1999 Juergen Schmied
   5  * Copyright 2003 Mike McCormack for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "urlmon_main.h"
  23
  24 #include "winreg.h"
  25 #include "winternl.h"
  26 #include "wininet.h"
  27 #include "shlwapi.h"
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(urlmon);
  32
  33 static const IStreamVtbl stvt;
  34
  35 HRESULT UMCreateStreamOnCacheFile(LPCWSTR pszURL,
  36                                   DWORD dwSize,
  37                                   LPWSTR pszFileName,
  38                                   HANDLE *phfile,
  39                                   IUMCacheStream **ppstr)
  40 {
  41     IUMCacheStream* ucstr;
  42     HANDLE handle;
  43     DWORD size;
  44     LPWSTR url, c, ext = NULL;
  45     HRESULT hr;
  46
  47     size = (strlenW(pszURL)+1)*sizeof(WCHAR);
  48     url = heap_alloc(size);
  49     memcpy(url, pszURL, size);
  50
  51     for (c = url; *c && *c != '#' && *c != '?'; ++c)
  52     {
  53         if (*c == '.')
  54             ext = c+1;
  55         else if(*c == '/')
  56             ext = NULL;
  57     }
  58
  59     *c = 0;
  60
  61     if(!CreateUrlCacheEntryW(url, dwSize, ext, pszFileName, 0))
  62        hr = HRESULT_FROM_WIN32(GetLastError());
  63     else
  64        hr = S_OK;
  65
  66     heap_free(url);
  67
  68     if (hr != S_OK)
  69        return hr;
  70
  71     TRACE("Opening %s\n", debugstr_w(pszFileName) );
  72
  73     handle = CreateFileW( pszFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, 0, NULL );
  74     if( handle == INVALID_HANDLE_VALUE )
  75        return HRESULT_FROM_WIN32(GetLastError());
  76
  77     if (phfile)
  78     {
  79        /* Call CreateFileW again because we need a handle with its own file pointer, and DuplicateHandle will return
  80         * a handle that shares its file pointer with the original.
  81         */
  82            *phfile = CreateFileW( pszFileName, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL );
  83
  84        if (*phfile == (HANDLE) HFILE_ERROR)
  85        {
  86            DWORD dwError = GetLastError();
  87
  88            CloseHandle(handle);
  89            return HRESULT_FROM_WIN32(dwError);
  90        }
  91     }
  92
  93     ucstr = heap_alloc_zero(sizeof(IUMCacheStream));
  94     if(ucstr)
  95     {
  96        ucstr->pszURL = heap_alloc_zero(sizeof(WCHAR) * (lstrlenW(pszURL) + 1));
  97        if (ucstr->pszURL)
  98        {
  99             ucstr->pszFileName = heap_alloc_zero(sizeof(WCHAR) * (lstrlenW(pszFileName) + 1));
 100            if (ucstr->pszFileName)
 101            {
 102               ucstr->lpVtbl=&stvt;
 103               ucstr->ref = 1;
 104               ucstr->handle = handle;
 105               ucstr->closed = 0;
 106               lstrcpyW(ucstr->pszURL, pszURL);
 107               lstrcpyW(ucstr->pszFileName, pszFileName);
 108
 109               *ppstr = ucstr;
 110
 111               return S_OK;
 112            }
 113            heap_free(ucstr->pszURL);
 114        }
 115        heap_free(ucstr);
 116     }
 117     CloseHandle(handle);
 118     if (phfile)
 119        CloseHandle(*phfile);
 120     return E_OUTOFMEMORY;
 121 }
 122
 123 void UMCloseCacheFileStream(IUMCacheStream *This)
 124 {
 125     if (!This->closed)
 126     {
 127        FILETIME ftZero;
 128
 129        ftZero.dwLowDateTime = ftZero.dwHighDateTime = 0;
 130
 131        This->closed = 1;
 132        CommitUrlCacheEntryW(This->pszURL,
 133                             This->pszFileName,
 134                             ftZero,
 135                             ftZero,
 136                             NORMAL_CACHE_ENTRY,
 137                             0,
 138                             0,
 139                             0,
 140                             0);
 141     }
 142 }
 143
 144 /**************************************************************************
 145 *  IStream_fnQueryInterface
 146 */
 147 static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface,
 148                                                REFIID riid,
 149                                                LPVOID *ppvObj)
 150 {
 151     IUMCacheStream *This = (IUMCacheStream *)iface;
 152
 153     TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 154
 155     *ppvObj = NULL;
 156
 157     if(IsEqualIID(riid, &IID_IUnknown) ||
 158        IsEqualIID(riid, &IID_IStream))
 159     {
 160       *ppvObj = This;
 161     }
 162
 163     if(*ppvObj)
 164     {
 165       IStream_AddRef((IStream*)*ppvObj);
 166       TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 167       return S_OK;
 168     }
 169     TRACE("-- Interface: E_NOINTERFACE\n");
 170     return E_NOINTERFACE;
 171 }
 172
 173 /**************************************************************************
 174 *  IStream_fnAddRef
 175 */
 176 static ULONG WINAPI IStream_fnAddRef(IStream *iface)
 177 {
 178     IUMCacheStream *This = (IUMCacheStream *)iface;
 179     ULONG refCount = InterlockedIncrement(&This->ref);
 180
 181     TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 182
 183     return refCount;
 184 }
 185
 186 /**************************************************************************
 187 *  IStream_fnRelease
 188 */
 189 static ULONG WINAPI IStream_fnRelease(IStream *iface)
 190 {
 191     IUMCacheStream *This = (IUMCacheStream *)iface;
 192     ULONG refCount = InterlockedDecrement(&This->ref);
 193
 194     TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 195
 196     if (!refCount)
 197     {
 198        TRACE(" destroying UMCacheStream (%p)\n",This);
 199        UMCloseCacheFileStream(This);
 200        CloseHandle(This->handle);
 201        heap_free(This->pszFileName);
 202        heap_free(This->pszURL);
 203        heap_free(This);
 204     }
 205     return refCount;
 206 }
 207
 208 static HRESULT WINAPI IStream_fnRead (IStream * iface,
 209                                       void* pv,
 210                                       ULONG cb,
 211                                       ULONG* pcbRead)
 212 {
 213     ULONG dwBytesRead;
 214     IUMCacheStream *This = (IUMCacheStream *)iface;
 215
 216     TRACE("(%p)->(%p,0x%08x,%p)\n",This, pv, cb, pcbRead);
 217
 218     if ( !pv )
 219        return STG_E_INVALIDPOINTER;
 220
 221     if ( !pcbRead)
 222         pcbRead = &dwBytesRead;
 223
 224     if ( ! ReadFile( This->handle, pv, cb, pcbRead, NULL ) )
 225        return S_FALSE;
 226
 227     if (!*pcbRead)
 228         return This->closed ? S_FALSE : E_PENDING;
 229     return S_OK;
 230 }
 231
 232 static HRESULT WINAPI IStream_fnWrite (IStream * iface,
 233                                        const void* pv,
 234                                        ULONG cb,
 235                                        ULONG* pcbWritten)
 236 {
 237     return E_NOTIMPL;
 238 }
 239
 240 static HRESULT WINAPI IStream_fnSeek (IStream * iface,
 241                                    LARGE_INTEGER dlibMove,
 242                                    DWORD dwOrigin,
 243                                    ULARGE_INTEGER* plibNewPosition)
 244 {
 245     LARGE_INTEGER newpos;
 246     IUMCacheStream *This = (IUMCacheStream *)iface;
 247
 248     TRACE("(%p)\n",This);
 249
 250     if (!SetFilePointerEx( This->handle, dlibMove, &newpos, dwOrigin ))
 251        return E_FAIL;
 252
 253     if (plibNewPosition)
 254         plibNewPosition->QuadPart = newpos.QuadPart;
 255
 256     return S_OK;
 257 }
 258
 259 static HRESULT WINAPI IStream_fnSetSize (IStream * iface,
 260                                          ULARGE_INTEGER libNewSize)
 261 {
 262     LARGE_INTEGER newpos;
 263     IUMCacheStream *This = (IUMCacheStream *)iface;
 264
 265     TRACE("(%p)\n",This);
 266
 267     newpos.QuadPart = libNewSize.QuadPart;
 268     if( ! SetFilePointerEx( This->handle, newpos, NULL, FILE_BEGIN ) )
 269        return E_FAIL;
 270
 271     if( ! SetEndOfFile( This->handle ) )
 272        return E_FAIL;
 273
 274     return S_OK;
 275 }
 276
 277 static HRESULT WINAPI IStream_fnCopyTo (IStream * iface,
 278                                    IStream* pstm,
 279                                    ULARGE_INTEGER cb,
 280                                    ULARGE_INTEGER* pcbRead,
 281                                    ULARGE_INTEGER* pcbWritten)
 282 {
 283     IUMCacheStream *This = (IUMCacheStream *)iface;
 284
 285     TRACE("(%p)\n",This);
 286
 287     return E_NOTIMPL;
 288 }
 289
 290 static HRESULT WINAPI IStream_fnCommit (IStream * iface,
 291                                    DWORD grfCommitFlags)
 292 {
 293     IUMCacheStream *This = (IUMCacheStream *)iface;
 294
 295     TRACE("(%p)\n",This);
 296
 297     return E_NOTIMPL;
 298 }
 299
 300 static HRESULT WINAPI IStream_fnRevert (IStream * iface)
 301 {
 302     IUMCacheStream *This = (IUMCacheStream *)iface;
 303
 304     TRACE("(%p)\n",This);
 305
 306     return E_NOTIMPL;
 307 }
 308 static HRESULT WINAPI IStream_fnLockRegion (IStream * iface,
 309                                             ULARGE_INTEGER libOffset,
 310                                             ULARGE_INTEGER cb,
 311                                             DWORD dwLockType)
 312 {
 313     IUMCacheStream *This = (IUMCacheStream *)iface;
 314
 315     TRACE("(%p)\n",This);
 316
 317     return E_NOTIMPL;
 318 }
 319 static HRESULT WINAPI IStream_fnUnlockRegion (IStream * iface,
 320                                               ULARGE_INTEGER libOffset,
 321                                               ULARGE_INTEGER cb,
 322                                               DWORD dwLockType)
 323 {
 324     IUMCacheStream *This = (IUMCacheStream *)iface;
 325
 326     TRACE("(%p)\n",This);
 327
 328     return E_NOTIMPL;
 329 }
 330 static HRESULT WINAPI IStream_fnStat (IStream * iface,
 331                                       STATSTG*   pstatstg,
 332                                       DWORD grfStatFlag)
 333 {
 334     IUMCacheStream *This = (IUMCacheStream *)iface;
 335
 336     TRACE("(%p)\n",This);
 337
 338     return E_NOTIMPL;
 339 }
 340 static HRESULT WINAPI IStream_fnClone (IStream * iface,
 341                                        IStream** ppstm)
 342 {
 343     IUMCacheStream *This = (IUMCacheStream *)iface;
 344
 345     TRACE("(%p)\n",This);
 346
 347     return E_NOTIMPL;
 348 }
 349
 350 static const IStreamVtbl stvt =
 351 {
 352     IStream_fnQueryInterface,
 353     IStream_fnAddRef,
 354     IStream_fnRelease,
 355     IStream_fnRead,
 356     IStream_fnWrite,
 357     IStream_fnSeek,
 358     IStream_fnSetSize,
 359     IStream_fnCopyTo,
 360     IStream_fnCommit,
 361     IStream_fnRevert,
 362     IStream_fnLockRegion,
 363     IStream_fnUnlockRegion,
 364     IStream_fnStat,
 365     IStream_fnClone
 366
 367 };
 368
 369 typedef struct ProxyBindStatusCallback
 370 {
 371     const IBindStatusCallbackVtbl *lpVtbl;
 372
 373     IBindStatusCallback *pBSC;
 374 } ProxyBindStatusCallback;
 375
 376 static HRESULT WINAPI ProxyBindStatusCallback_QueryInterface(IBindStatusCallback *iface, REFIID riid, void **ppv)
 377 {
 378     if (IsEqualGUID(&IID_IBindStatusCallback, riid) ||
 379         IsEqualGUID(&IID_IUnknown, riid))
 380     {
 381         *ppv = iface;
 382         IUnknown_AddRef(iface);
 383         return S_OK;
 384     }
 385
 386     *ppv = NULL;
 387     return E_NOINTERFACE;
 388 }
 389
 390 static ULONG WINAPI ProxyBindStatusCallback_AddRef(IBindStatusCallback *iface)
 391 {
 392     return 2;
 393 }
 394
 395 static ULONG WINAPI ProxyBindStatusCallback_Release(IBindStatusCallback *iface)
 396 {
 397     return 1;
 398 }
 399
 400 static HRESULT WINAPI ProxyBindStatusCallback_OnStartBinding(IBindStatusCallback *iface, DWORD dwReserved,
 401                                                IBinding *pib)
 402 {
 403     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 404
 405     if(This->pBSC)
 406         return IBindStatusCallback_OnStartBinding(This->pBSC, dwReserved, pib);
 407
 408     return S_OK;
 409 }
 410
 411 static HRESULT WINAPI ProxyBindStatusCallback_GetPriority(IBindStatusCallback *iface, LONG *pnPriority)
 412 {
 413     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 414
 415     if(This->pBSC)
 416         return IBindStatusCallback_GetPriority(This->pBSC, pnPriority);
 417
 418     return S_OK;
 419 }
 420
 421 static HRESULT WINAPI ProxyBindStatusCallback_OnLowResource(IBindStatusCallback *iface, DWORD reserved)
 422 {
 423     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 424
 425     if(This->pBSC)
 426         return IBindStatusCallback_OnLowResource(This->pBSC, reserved);
 427
 428     return S_OK;
 429 }
 430
 431 static HRESULT WINAPI ProxyBindStatusCallback_OnProgress(IBindStatusCallback *iface, ULONG ulProgress,
 432                                            ULONG ulProgressMax, ULONG ulStatusCode, LPCWSTR szStatusText)
 433 {
 434     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 435
 436     if(This->pBSC)
 437         return IBindStatusCallback_OnProgress(This->pBSC, ulProgress,
 438                                           ulProgressMax, ulStatusCode,
 439                                           szStatusText);
 440
 441     return S_OK;
 442 }
 443
 444 static HRESULT WINAPI ProxyBindStatusCallback_OnStopBinding(IBindStatusCallback *iface, HRESULT hresult, LPCWSTR szError)
 445 {
 446     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 447
 448     if(This->pBSC)
 449         return IBindStatusCallback_OnStopBinding(This->pBSC, hresult, szError);
 450
 451     return S_OK;
 452 }
 453
 454 static HRESULT WINAPI ProxyBindStatusCallback_GetBindInfo(IBindStatusCallback *iface, DWORD *grfBINDF, BINDINFO *pbindinfo)
 455 {
 456     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 457
 458     if(This->pBSC)
 459         return IBindStatusCallback_GetBindInfo(This->pBSC, grfBINDF, pbindinfo);
 460
 461     return E_INVALIDARG;
 462 }
 463
 464 static HRESULT WINAPI ProxyBindStatusCallback_OnDataAvailable(IBindStatusCallback *iface, DWORD grfBSCF,
 465                                                               DWORD dwSize, FORMATETC* pformatetc, STGMEDIUM* pstgmed)
 466 {
 467     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 468
 469     if(This->pBSC)
 470         return IBindStatusCallback_OnDataAvailable(This->pBSC, grfBSCF, dwSize,
 471                                                pformatetc, pstgmed);
 472
 473     return S_OK;
 474 }
 475
 476 static HRESULT WINAPI ProxyBindStatusCallback_OnObjectAvailable(IBindStatusCallback *iface, REFIID riid, IUnknown *punk)
 477 {
 478     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 479
 480     if(This->pBSC)
 481         return IBindStatusCallback_OnObjectAvailable(This->pBSC, riid, punk);
 482
 483     return S_OK;
 484 }
 485
 486 static HRESULT WINAPI BlockingBindStatusCallback_OnDataAvailable(IBindStatusCallback *iface, DWORD grfBSCF,
 487                                                                  DWORD dwSize, FORMATETC* pformatetc, STGMEDIUM* pstgmed)
 488 {
 489     return S_OK;
 490 }
 491
 492 static const IBindStatusCallbackVtbl BlockingBindStatusCallbackVtbl =
 493 {
 494     ProxyBindStatusCallback_QueryInterface,
 495     ProxyBindStatusCallback_AddRef,
 496     ProxyBindStatusCallback_Release,
 497     ProxyBindStatusCallback_OnStartBinding,
 498     ProxyBindStatusCallback_GetPriority,
 499     ProxyBindStatusCallback_OnLowResource,
 500     ProxyBindStatusCallback_OnProgress,
 501     ProxyBindStatusCallback_OnStopBinding,
 502     ProxyBindStatusCallback_GetBindInfo,
 503     BlockingBindStatusCallback_OnDataAvailable,
 504     ProxyBindStatusCallback_OnObjectAvailable
 505 };
 506
 507 static HRESULT WINAPI AsyncBindStatusCallback_GetBindInfo(IBindStatusCallback *iface, DWORD *grfBINDF, BINDINFO *pbindinfo)
 508 {
 509     ProxyBindStatusCallback *This = (ProxyBindStatusCallback *)iface;
 510     HRESULT hr = IBindStatusCallback_GetBindInfo(This->pBSC, grfBINDF, pbindinfo);
 511     *grfBINDF |= BINDF_PULLDATA | BINDF_ASYNCHRONOUS | BINDF_ASYNCSTORAGE;
 512     return hr;
 513 }
 514
 515 static const IBindStatusCallbackVtbl AsyncBindStatusCallbackVtbl =
 516 {
 517     ProxyBindStatusCallback_QueryInterface,
 518     ProxyBindStatusCallback_AddRef,
 519     ProxyBindStatusCallback_Release,
 520     ProxyBindStatusCallback_OnStartBinding,
 521     ProxyBindStatusCallback_GetPriority,
 522     ProxyBindStatusCallback_OnLowResource,
 523     ProxyBindStatusCallback_OnProgress,
 524     ProxyBindStatusCallback_OnStopBinding,
 525     AsyncBindStatusCallback_GetBindInfo,
 526     ProxyBindStatusCallback_OnDataAvailable,
 527     ProxyBindStatusCallback_OnObjectAvailable
 528 };
 529
 530 static HRESULT URLStartDownload(LPCWSTR szURL, LPSTREAM *ppStream, IBindStatusCallback *pBSC)
 531 {
 532     HRESULT hr;
 533     IMoniker *pMoniker;
 534     IBindCtx *pbc;
 535
 536     *ppStream = NULL;
 537
 538     hr = CreateURLMoniker(NULL, szURL, &pMoniker);
 539     if (FAILED(hr))
 540         return hr;
 541
 542     hr = CreateBindCtx(0, &pbc);
 543     if (FAILED(hr))
 544     {
 545         IMoniker_Release(pMoniker);
 546         return hr;
 547     }
 548
 549     hr = RegisterBindStatusCallback(pbc, pBSC, NULL, 0);
 550     if (FAILED(hr))
 551     {
 552         IBindCtx_Release(pbc);
 553         IMoniker_Release(pMoniker);
 554         return hr;
 555     }
 556
 557     hr = IMoniker_BindToStorage(pMoniker, pbc, NULL, &IID_IStream, (void **)ppStream);
 558
 559     /* BindToStorage returning E_PENDING because it's asynchronous is not an error */
 560     if (hr == E_PENDING) hr = S_OK;
 561
 562     IBindCtx_Release(pbc);
 563     IMoniker_Release(pMoniker);
 564
 565     return hr;
 566 }
 567
 568 /***********************************************************************
 569  *              URLOpenBlockingStreamA (URLMON.@)
 570  */
 571 HRESULT WINAPI URLOpenBlockingStreamA(LPUNKNOWN pCaller, LPCSTR szURL,
 572                                       LPSTREAM *ppStream, DWORD dwReserved,
 573                                       LPBINDSTATUSCALLBACK lpfnCB)
 574 {
 575     LPWSTR szURLW;
 576     int len;
 577     HRESULT hr;
 578
 579     TRACE("(%p, %s, %p, 0x%x, %p)\n", pCaller, szURL, ppStream, dwReserved, lpfnCB);
 580
 581     if (!szURL || !ppStream)
 582         return E_INVALIDARG;
 583
 584     len = MultiByteToWideChar(CP_ACP, 0, szURL, -1, NULL, 0);
 585     szURLW = heap_alloc(len * sizeof(WCHAR));
 586     if (!szURLW)
 587     {
 588         *ppStream = NULL;
 589         return E_OUTOFMEMORY;
 590     }
 591     MultiByteToWideChar(CP_ACP, 0, szURL, -1, szURLW, len);
 592
 593     hr = URLOpenBlockingStreamW(pCaller, szURLW, ppStream, dwReserved, lpfnCB);
 594
 595     heap_free(szURLW);
 596
 597     return hr;
 598 }
 599
 600 /***********************************************************************
 601  *              URLOpenBlockingStreamW (URLMON.@)
 602  */
 603 HRESULT WINAPI URLOpenBlockingStreamW(LPUNKNOWN pCaller, LPCWSTR szURL,
 604                                       LPSTREAM *ppStream, DWORD dwReserved,
 605                                       LPBINDSTATUSCALLBACK lpfnCB)
 606 {
 607     ProxyBindStatusCallback blocking_bsc;
 608
 609     TRACE("(%p, %s, %p, 0x%x, %p)\n", pCaller, debugstr_w(szURL), ppStream,
 610           dwReserved, lpfnCB);
 611
 612     if (!szURL || !ppStream)
 613         return E_INVALIDARG;
 614
 615     blocking_bsc.lpVtbl = &BlockingBindStatusCallbackVtbl;
 616     blocking_bsc.pBSC = lpfnCB;
 617
 618     return URLStartDownload(szURL, ppStream, (IBindStatusCallback *)&blocking_bsc);
 619 }
 620
 621 /***********************************************************************
 622  *              URLOpenStreamA (URLMON.@)
 623  */
 624 HRESULT WINAPI URLOpenStreamA(LPUNKNOWN pCaller, LPCSTR szURL, DWORD dwReserved,
 625                               LPBINDSTATUSCALLBACK lpfnCB)
 626 {
 627     LPWSTR szURLW;
 628     int len;
 629     HRESULT hr;
 630
 631     TRACE("(%p, %s, 0x%x, %p)\n", pCaller, szURL, dwReserved, lpfnCB);
 632
 633     if (!szURL)
 634         return E_INVALIDARG;
 635
 636     len = MultiByteToWideChar(CP_ACP, 0, szURL, -1, NULL, 0);
 637     szURLW = heap_alloc(len * sizeof(WCHAR));
 638     if (!szURLW)
 639         return E_OUTOFMEMORY;
 640     MultiByteToWideChar(CP_ACP, 0, szURL, -1, szURLW, len);
 641
 642     hr = URLOpenStreamW(pCaller, szURLW, dwReserved, lpfnCB);
 643
 644     heap_free(szURLW);
 645
 646     return hr;
 647 }
 648
 649 /***********************************************************************
 650  *              URLOpenStreamW (URLMON.@)
 651  */
 652 HRESULT WINAPI URLOpenStreamW(LPUNKNOWN pCaller, LPCWSTR szURL, DWORD dwReserved,
 653                               LPBINDSTATUSCALLBACK lpfnCB)
 654 {
 655     HRESULT hr;
 656     ProxyBindStatusCallback async_bsc;
 657     IStream *pStream;
 658
 659     TRACE("(%p, %s, 0x%x, %p)\n", pCaller, debugstr_w(szURL), dwReserved,
 660           lpfnCB);
 661
 662     if (!szURL)
 663         return E_INVALIDARG;
 664
 665     async_bsc.lpVtbl = &AsyncBindStatusCallbackVtbl;
 666     async_bsc.pBSC = lpfnCB;
 667
 668     hr = URLStartDownload(szURL, &pStream, (IBindStatusCallback *)&async_bsc);
 669     if (SUCCEEDED(hr) && pStream)
 670         IStream_Release(pStream);
 671
 672     return hr;
 673 }