dlls/urlmon/session.c

   1 /*
   2  * Copyright 2005-2006 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "urlmon_main.h"
  20 #include "winreg.h"
  21
  22 #include "wine/debug.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(urlmon);
  25
  26 typedef struct name_space {
  27     LPWSTR protocol;
  28     IClassFactory *cf;
  29     CLSID clsid;
  30     BOOL urlmon;
  31
  32     struct name_space *next;
  33 } name_space;
  34
  35 typedef struct mime_filter {
  36     IClassFactory *cf;
  37     CLSID clsid;
  38     LPWSTR mime;
  39
  40     struct mime_filter *next;
  41 } mime_filter;
  42
  43 static name_space *name_space_list = NULL;
  44 static mime_filter *mime_filter_list = NULL;
  45
  46 static CRITICAL_SECTION session_cs;
  47 static CRITICAL_SECTION_DEBUG session_cs_dbg =
  48 {
  49     0, 0, &session_cs,
  50     { &session_cs_dbg.ProcessLocksList, &session_cs_dbg.ProcessLocksList },
  51       0, 0, { (DWORD_PTR)(__FILE__ ": session") }
  52 };
  53 static CRITICAL_SECTION session_cs = { &session_cs_dbg, -1, 0, 0, 0, 0 };
  54
  55 static const WCHAR internet_settings_keyW[] =
  56     {'S','O','F','T','W','A','R','E',
  57      '\\','M','i','c','r','o','s','o','f','t',
  58      '\\','W','i','n','d','o','w','s',
  59      '\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n',
  60      '\\','I','n','t','e','r','n','e','t',' ','S','e','t','t','i','n','g','s',0};
  61
  62 static name_space *find_name_space(LPCWSTR protocol)
  63 {
  64     name_space *iter;
  65
  66     for(iter = name_space_list; iter; iter = iter->next) {
  67         if(!strcmpW(iter->protocol, protocol))
  68             return iter;
  69     }
  70
  71     return NULL;
  72 }
  73
  74 static HRESULT get_protocol_cf(LPCWSTR schema, DWORD schema_len, CLSID *pclsid, IClassFactory **ret)
  75 {
  76     WCHAR str_clsid[64];
  77     HKEY hkey = NULL;
  78     DWORD res, type, size;
  79     CLSID clsid;
  80     LPWSTR wszKey;
  81     HRESULT hres;
  82
  83     static const WCHAR wszProtocolsKey[] =
  84         {'P','R','O','T','O','C','O','L','S','\\','H','a','n','d','l','e','r','\\'};
  85     static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
  86
  87     wszKey = heap_alloc(sizeof(wszProtocolsKey)+(schema_len+1)*sizeof(WCHAR));
  88     memcpy(wszKey, wszProtocolsKey, sizeof(wszProtocolsKey));
  89     memcpy(wszKey + sizeof(wszProtocolsKey)/sizeof(WCHAR), schema, (schema_len+1)*sizeof(WCHAR));
  90
  91     res = RegOpenKeyW(HKEY_CLASSES_ROOT, wszKey, &hkey);
  92     heap_free(wszKey);
  93     if(res != ERROR_SUCCESS) {
  94         TRACE("Could not open protocol handler key\n");
  95         return MK_E_SYNTAX;
  96     }
  97
  98     size = sizeof(str_clsid);
  99     res = RegQueryValueExW(hkey, wszCLSID, NULL, &type, (LPBYTE)str_clsid, &size);
 100     RegCloseKey(hkey);
 101     if(res != ERROR_SUCCESS || type != REG_SZ) {
 102         WARN("Could not get protocol CLSID res=%d\n", res);
 103         return MK_E_SYNTAX;
 104     }
 105
 106     hres = CLSIDFromString(str_clsid, &clsid);
 107     if(FAILED(hres)) {
 108         WARN("CLSIDFromString failed: %08x\n", hres);
 109         return hres;
 110     }
 111
 112     if(pclsid)
 113         *pclsid = clsid;
 114
 115     if(!ret)
 116         return S_OK;
 117
 118     hres = CoGetClassObject(&clsid, CLSCTX_INPROC_SERVER, NULL, &IID_IClassFactory, (void**)ret);
 119     return SUCCEEDED(hres) ? S_OK : MK_E_SYNTAX;
 120 }
 121
 122 static HRESULT register_namespace(IClassFactory *cf, REFIID clsid, LPCWSTR protocol, BOOL urlmon_protocol)
 123 {
 124     name_space *new_name_space;
 125
 126     new_name_space = heap_alloc(sizeof(name_space));
 127
 128     if(!urlmon_protocol)
 129         IClassFactory_AddRef(cf);
 130     new_name_space->cf = cf;
 131     new_name_space->clsid = *clsid;
 132     new_name_space->urlmon = urlmon_protocol;
 133     new_name_space->protocol = heap_strdupW(protocol);
 134
 135     EnterCriticalSection(&session_cs);
 136
 137     new_name_space->next = name_space_list;
 138     name_space_list = new_name_space;
 139
 140     LeaveCriticalSection(&session_cs);
 141
 142     return S_OK;
 143 }
 144
 145 static HRESULT unregister_namespace(IClassFactory *cf, LPCWSTR protocol)
 146 {
 147     name_space *iter, *last = NULL;
 148
 149     EnterCriticalSection(&session_cs);
 150
 151     for(iter = name_space_list; iter; iter = iter->next) {
 152         if(iter->cf == cf && !strcmpW(iter->protocol, protocol))
 153             break;
 154         last = iter;
 155     }
 156
 157     if(iter) {
 158         if(last)
 159             last->next = iter->next;
 160         else
 161             name_space_list = iter->next;
 162     }
 163
 164     LeaveCriticalSection(&session_cs);
 165
 166     if(iter) {
 167         if(!iter->urlmon)
 168             IClassFactory_Release(iter->cf);
 169         heap_free(iter->protocol);
 170         heap_free(iter);
 171     }
 172
 173     return S_OK;
 174 }
 175
 176
 177 void register_urlmon_namespace(IClassFactory *cf, REFIID clsid, LPCWSTR protocol, BOOL do_register)
 178 {
 179     if(do_register)
 180         register_namespace(cf, clsid, protocol, TRUE);
 181     else
 182         unregister_namespace(cf, protocol);
 183 }
 184
 185 BOOL is_registered_protocol(LPCWSTR url)
 186 {
 187     DWORD schema_len;
 188     WCHAR schema[64];
 189     HRESULT hres;
 190
 191     hres = CoInternetParseUrl(url, PARSE_SCHEMA, 0, schema, sizeof(schema)/sizeof(schema[0]),
 192             &schema_len, 0);
 193     if(FAILED(hres))
 194         return FALSE;
 195
 196     return get_protocol_cf(schema, schema_len, NULL, NULL) == S_OK;
 197 }
 198
 199 IInternetProtocolInfo *get_protocol_info(LPCWSTR url)
 200 {
 201     IInternetProtocolInfo *ret = NULL;
 202     IClassFactory *cf;
 203     name_space *ns;
 204     WCHAR schema[64];
 205     DWORD schema_len;
 206     HRESULT hres;
 207
 208     hres = CoInternetParseUrl(url, PARSE_SCHEMA, 0, schema, sizeof(schema)/sizeof(schema[0]),
 209             &schema_len, 0);
 210     if(FAILED(hres) || !schema_len)
 211         return NULL;
 212
 213     EnterCriticalSection(&session_cs);
 214
 215     ns = find_name_space(schema);
 216     if(ns && !ns->urlmon) {
 217         hres = IClassFactory_QueryInterface(ns->cf, &IID_IInternetProtocolInfo, (void**)&ret);
 218         if(FAILED(hres))
 219             hres = IClassFactory_CreateInstance(ns->cf, NULL, &IID_IInternetProtocolInfo, (void**)&ret);
 220     }
 221
 222     LeaveCriticalSection(&session_cs);
 223
 224     if(ns && SUCCEEDED(hres))
 225         return ret;
 226
 227     hres = get_protocol_cf(schema, schema_len, NULL, &cf);
 228     if(FAILED(hres))
 229         return NULL;
 230
 231     hres = IClassFactory_QueryInterface(cf, &IID_IInternetProtocolInfo, (void**)&ret);
 232     if(FAILED(hres))
 233         IClassFactory_CreateInstance(cf, NULL, &IID_IInternetProtocolInfo, (void**)&ret);
 234     IClassFactory_Release(cf);
 235
 236     return ret;
 237 }
 238
 239 HRESULT get_protocol_handler(LPCWSTR url, CLSID *clsid, BOOL *urlmon_protocol, IClassFactory **ret)
 240 {
 241     name_space *ns;
 242     WCHAR schema[64];
 243     DWORD schema_len;
 244     HRESULT hres;
 245
 246     *ret = NULL;
 247
 248     hres = CoInternetParseUrl(url, PARSE_SCHEMA, 0, schema, sizeof(schema)/sizeof(schema[0]),
 249             &schema_len, 0);
 250     if(FAILED(hres) || !schema_len)
 251         return schema_len ? hres : MK_E_SYNTAX;
 252
 253     EnterCriticalSection(&session_cs);
 254
 255     ns = find_name_space(schema);
 256     if(ns) {
 257         *ret = ns->cf;
 258         IClassFactory_AddRef(*ret);
 259         if(clsid)
 260             *clsid = ns->clsid;
 261         if(urlmon_protocol)
 262             *urlmon_protocol = ns->urlmon;
 263     }
 264
 265     LeaveCriticalSection(&session_cs);
 266
 267     if(*ret)
 268         return S_OK;
 269
 270     if(urlmon_protocol)
 271         *urlmon_protocol = FALSE;
 272     return get_protocol_cf(schema, schema_len, clsid, ret);
 273 }
 274
 275 IInternetProtocol *get_mime_filter(LPCWSTR mime)
 276 {
 277     IClassFactory *cf = NULL;
 278     IInternetProtocol *ret;
 279     mime_filter *iter;
 280     HRESULT hres;
 281
 282     EnterCriticalSection(&session_cs);
 283
 284     for(iter = mime_filter_list; iter; iter = iter->next) {
 285         if(!strcmpW(iter->mime, mime)) {
 286             cf = iter->cf;
 287             break;
 288         }
 289     }
 290
 291     LeaveCriticalSection(&session_cs);
 292
 293     if(!cf)
 294         return NULL;
 295
 296     hres = IClassFactory_CreateInstance(cf, NULL, &IID_IInternetProtocol, (void**)&ret);
 297     if(FAILED(hres)) {
 298         WARN("CreateInstance failed: %08x\n", hres);
 299         return NULL;
 300     }
 301
 302     return ret;
 303 }
 304
 305 static HRESULT WINAPI InternetSession_QueryInterface(IInternetSession *iface,
 306         REFIID riid, void **ppv)
 307 {
 308     TRACE("(%s %p)\n", debugstr_guid(riid), ppv);
 309
 310     if(IsEqualGUID(&IID_IUnknown, riid) || IsEqualGUID(&IID_IInternetSession, riid)) {
 311         *ppv = iface;
 312         IInternetSession_AddRef(iface);
 313         return S_OK;
 314     }
 315
 316     *ppv = NULL;
 317     return E_NOINTERFACE;
 318 }
 319
 320 static ULONG WINAPI InternetSession_AddRef(IInternetSession *iface)
 321 {
 322     TRACE("()\n");
 323     URLMON_LockModule();
 324     return 2;
 325 }
 326
 327 static ULONG WINAPI InternetSession_Release(IInternetSession *iface)
 328 {
 329     TRACE("()\n");
 330     URLMON_UnlockModule();
 331     return 1;
 332 }
 333
 334 static HRESULT WINAPI InternetSession_RegisterNameSpace(IInternetSession *iface,
 335         IClassFactory *pCF, REFCLSID rclsid, LPCWSTR pwzProtocol, ULONG cPatterns,
 336         const LPCWSTR *ppwzPatterns, DWORD dwReserved)
 337 {
 338     TRACE("(%p %s %s %d %p %d)\n", pCF, debugstr_guid(rclsid), debugstr_w(pwzProtocol),
 339           cPatterns, ppwzPatterns, dwReserved);
 340
 341     if(cPatterns || ppwzPatterns)
 342         FIXME("patterns not supported\n");
 343     if(dwReserved)
 344         WARN("dwReserved = %d\n", dwReserved);
 345
 346     if(!pCF || !pwzProtocol)
 347         return E_INVALIDARG;
 348
 349     return register_namespace(pCF, rclsid, pwzProtocol, FALSE);
 350 }
 351
 352 static HRESULT WINAPI InternetSession_UnregisterNameSpace(IInternetSession *iface,
 353         IClassFactory *pCF, LPCWSTR pszProtocol)
 354 {
 355     TRACE("(%p %s)\n", pCF, debugstr_w(pszProtocol));
 356
 357     if(!pCF || !pszProtocol)
 358         return E_INVALIDARG;
 359
 360     return unregister_namespace(pCF, pszProtocol);
 361 }
 362
 363 static HRESULT WINAPI InternetSession_RegisterMimeFilter(IInternetSession *iface,
 364         IClassFactory *pCF, REFCLSID rclsid, LPCWSTR pwzType)
 365 {
 366     mime_filter *filter;
 367
 368     TRACE("(%p %s %s)\n", pCF, debugstr_guid(rclsid), debugstr_w(pwzType));
 369
 370     filter = heap_alloc(sizeof(mime_filter));
 371
 372     IClassFactory_AddRef(pCF);
 373     filter->cf = pCF;
 374     filter->clsid = *rclsid;
 375     filter->mime = heap_strdupW(pwzType);
 376
 377     EnterCriticalSection(&session_cs);
 378
 379     filter->next = mime_filter_list;
 380     mime_filter_list = filter;
 381
 382     LeaveCriticalSection(&session_cs);
 383
 384     return S_OK;
 385 }
 386
 387 static HRESULT WINAPI InternetSession_UnregisterMimeFilter(IInternetSession *iface,
 388         IClassFactory *pCF, LPCWSTR pwzType)
 389 {
 390     mime_filter *iter, *prev = NULL;
 391
 392     TRACE("(%p %s)\n", pCF, debugstr_w(pwzType));
 393
 394     EnterCriticalSection(&session_cs);
 395
 396     for(iter = mime_filter_list; iter; iter = iter->next) {
 397         if(iter->cf == pCF && !strcmpW(iter->mime, pwzType))
 398             break;
 399         prev = iter;
 400     }
 401
 402     if(iter) {
 403         if(prev)
 404             prev->next = iter->next;
 405         else
 406             mime_filter_list = iter->next;
 407     }
 408
 409     LeaveCriticalSection(&session_cs);
 410
 411     if(iter) {
 412         IClassFactory_Release(iter->cf);
 413         heap_free(iter->mime);
 414         heap_free(iter);
 415     }
 416
 417     return S_OK;
 418 }
 419
 420 static HRESULT WINAPI InternetSession_CreateBinding(IInternetSession *iface,
 421         LPBC pBC, LPCWSTR szUrl, IUnknown *pUnkOuter, IUnknown **ppUnk,
 422         IInternetProtocol **ppOInetProt, DWORD dwOption)
 423 {
 424     TRACE("(%p %s %p %p %p %08x)\n", pBC, debugstr_w(szUrl), pUnkOuter, ppUnk,
 425             ppOInetProt, dwOption);
 426
 427     if(pBC || pUnkOuter || ppUnk || dwOption)
 428         FIXME("Unsupported arguments\n");
 429
 430     return create_binding_protocol(szUrl, FALSE, ppOInetProt);
 431 }
 432
 433 static HRESULT WINAPI InternetSession_SetSessionOption(IInternetSession *iface,
 434         DWORD dwOption, LPVOID pBuffer, DWORD dwBufferLength, DWORD dwReserved)
 435 {
 436     FIXME("(%08x %p %d %d)\n", dwOption, pBuffer, dwBufferLength, dwReserved);
 437     return E_NOTIMPL;
 438 }
 439
 440 static const IInternetSessionVtbl InternetSessionVtbl = {
 441     InternetSession_QueryInterface,
 442     InternetSession_AddRef,
 443     InternetSession_Release,
 444     InternetSession_RegisterNameSpace,
 445     InternetSession_UnregisterNameSpace,
 446     InternetSession_RegisterMimeFilter,
 447     InternetSession_UnregisterMimeFilter,
 448     InternetSession_CreateBinding,
 449     InternetSession_SetSessionOption
 450 };
 451
 452 static IInternetSession InternetSession = { &InternetSessionVtbl };
 453
 454 /***********************************************************************
 455  *           CoInternetGetSession (URLMON.@)
 456  *
 457  * Create a new internet session and return an IInternetSession interface
 458  * representing it.
 459  *
 460  * PARAMS
 461  *    dwSessionMode      [I] Mode for the internet session
 462  *    ppIInternetSession [O] Destination for creates IInternetSession object
 463  *    dwReserved         [I] Reserved, must be 0.
 464  *
 465  * RETURNS
 466  *    Success: S_OK. ppIInternetSession contains the IInternetSession interface.
 467  *    Failure: E_INVALIDARG, if any argument is invalid, or
 468  *             E_OUTOFMEMORY if memory allocation fails.
 469  */
 470 HRESULT WINAPI CoInternetGetSession(DWORD dwSessionMode, IInternetSession **ppIInternetSession,
 471         DWORD dwReserved)
 472 {
 473     TRACE("(%d %p %d)\n", dwSessionMode, ppIInternetSession, dwReserved);
 474
 475     if(dwSessionMode)
 476         ERR("dwSessionMode=%d\n", dwSessionMode);
 477     if(dwReserved)
 478         ERR("dwReserved=%d\n", dwReserved);
 479
 480     IInternetSession_AddRef(&InternetSession);
 481     *ppIInternetSession = &InternetSession;
 482     return S_OK;
 483 }
 484
 485 /**************************************************************************
 486  *                 UrlMkGetSessionOption (URLMON.@)
 487  */
 488 static BOOL get_url_encoding(HKEY root, DWORD *encoding)
 489 {
 490     DWORD size = sizeof(DWORD), res, type;
 491     HKEY hkey;
 492
 493     static const WCHAR wszUrlEncoding[] = {'U','r','l','E','n','c','o','d','i','n','g',0};
 494
 495     res = RegOpenKeyW(root, internet_settings_keyW, &hkey);
 496     if(res != ERROR_SUCCESS)
 497         return FALSE;
 498
 499     res = RegQueryValueExW(hkey, wszUrlEncoding, NULL, &type, (LPBYTE)encoding, &size);
 500     RegCloseKey(hkey);
 501
 502     return res == ERROR_SUCCESS;
 503 }
 504
 505 static LPWSTR user_agent;
 506
 507 static void ensure_useragent(void)
 508 {
 509     DWORD size = sizeof(DWORD), res, type;
 510     HKEY hkey;
 511
 512     static const WCHAR user_agentW[] = {'U','s','e','r',' ','A','g','e','n','t',0};
 513
 514     if(user_agent)
 515         return;
 516
 517     res = RegOpenKeyW(HKEY_CURRENT_USER, internet_settings_keyW, &hkey);
 518     if(res != ERROR_SUCCESS)
 519         return;
 520
 521     res = RegQueryValueExW(hkey, user_agentW, NULL, &type, NULL, &size);
 522     if(res == ERROR_SUCCESS && type == REG_SZ) {
 523         user_agent = heap_alloc(size);
 524         res = RegQueryValueExW(hkey, user_agentW, NULL, &type, (LPBYTE)user_agent, &size);
 525         if(res != ERROR_SUCCESS) {
 526             heap_free(user_agent);
 527             user_agent = NULL;
 528         }
 529     }else {
 530         WARN("Could not find User Agent value: %u\n", res);
 531     }
 532
 533     RegCloseKey(hkey);
 534 }
 535
 536 LPWSTR get_useragent(void)
 537 {
 538     LPWSTR ret;
 539
 540     ensure_useragent();
 541
 542     EnterCriticalSection(&session_cs);
 543     ret = heap_strdupW(user_agent);
 544     LeaveCriticalSection(&session_cs);
 545
 546     return ret;
 547 }
 548
 549 HRESULT WINAPI UrlMkGetSessionOption(DWORD dwOption, LPVOID pBuffer, DWORD dwBufferLength,
 550                                      DWORD* pdwBufferLength, DWORD dwReserved)
 551 {
 552     TRACE("(%x, %p, %d, %p)\n", dwOption, pBuffer, dwBufferLength, pdwBufferLength);
 553
 554     if(dwReserved)
 555         WARN("dwReserved = %d\n", dwReserved);
 556
 557     switch(dwOption) {
 558     case URLMON_OPTION_USERAGENT: {
 559         HRESULT hres = E_OUTOFMEMORY;
 560         DWORD size;
 561
 562         if(!pdwBufferLength)
 563             return E_INVALIDARG;
 564
 565         EnterCriticalSection(&session_cs);
 566
 567         ensure_useragent();
 568         if(user_agent) {
 569             size = WideCharToMultiByte(CP_ACP, 0, user_agent, -1, NULL, 0, NULL, NULL);
 570             *pdwBufferLength = size;
 571             if(size <= dwBufferLength) {
 572                 if(pBuffer)
 573                     WideCharToMultiByte(CP_ACP, 0, user_agent, -1, pBuffer, size, NULL, NULL);
 574                 else
 575                     hres = E_INVALIDARG;
 576             }
 577         }
 578
 579         LeaveCriticalSection(&session_cs);
 580
 581         /* Tests prove that we have to return E_OUTOFMEMORY on success. */
 582         return hres;
 583     }
 584     case URLMON_OPTION_URL_ENCODING: {
 585         DWORD encoding = 0;
 586
 587         if(!pBuffer || dwBufferLength < sizeof(DWORD) || !pdwBufferLength)
 588             return E_INVALIDARG;
 589
 590         if(!get_url_encoding(HKEY_CURRENT_USER, &encoding))
 591             get_url_encoding(HKEY_LOCAL_MACHINE, &encoding);
 592
 593         *pdwBufferLength = sizeof(DWORD);
 594         *(DWORD*)pBuffer = encoding ? URL_ENCODING_DISABLE_UTF8 : URL_ENCODING_ENABLE_UTF8;
 595         return S_OK;
 596     }
 597     default:
 598         FIXME("unsupported option %x\n", dwOption);
 599     }
 600
 601     return E_INVALIDARG;
 602 }
 603
 604 /**************************************************************************
 605  *                 UrlMkSetSessionOption (URLMON.@)
 606  */
 607 HRESULT WINAPI UrlMkSetSessionOption(DWORD dwOption, LPVOID pBuffer, DWORD dwBufferLength,
 608         DWORD Reserved)
 609 {
 610     TRACE("(%x %p %x)\n", dwOption, pBuffer, dwBufferLength);
 611
 612     switch(dwOption) {
 613     case URLMON_OPTION_USERAGENT: {
 614         LPWSTR new_user_agent;
 615         char *buf = pBuffer;
 616         DWORD len, size;
 617
 618         if(!pBuffer || !dwBufferLength)
 619             return E_INVALIDARG;
 620
 621         for(len=0; len<dwBufferLength && buf[len]; len++);
 622
 623         TRACE("Setting user agent %s\n", debugstr_an(buf, len));
 624
 625         size = MultiByteToWideChar(CP_ACP, 0, buf, len, NULL, 0);
 626         new_user_agent = heap_alloc((size+1)*sizeof(WCHAR));
 627         if(!new_user_agent)
 628             return E_OUTOFMEMORY;
 629         MultiByteToWideChar(CP_ACP, 0, buf, len, new_user_agent, size);
 630         new_user_agent[size] = 0;
 631
 632         EnterCriticalSection(&session_cs);
 633
 634         heap_free(user_agent);
 635         user_agent = new_user_agent;
 636
 637         LeaveCriticalSection(&session_cs);
 638         break;
 639     }
 640     default:
 641         FIXME("Unknown option %x\n", dwOption);
 642         return E_INVALIDARG;
 643     }
 644
 645     return S_OK;
 646 }
 647
 648 /**************************************************************************
 649  *                 ObtainUserAgentString (URLMON.@)
 650  */
 651 HRESULT WINAPI ObtainUserAgentString(DWORD dwOption, LPSTR pcszUAOut, DWORD *cbSize)
 652 {
 653     DWORD size;
 654     HRESULT hres = E_FAIL;
 655
 656     TRACE("(%d %p %p)\n", dwOption, pcszUAOut, cbSize);
 657
 658     if(!pcszUAOut || !cbSize)
 659         return E_INVALIDARG;
 660
 661     EnterCriticalSection(&session_cs);
 662
 663     ensure_useragent();
 664     if(user_agent) {
 665         size = WideCharToMultiByte(CP_ACP, 0, user_agent, -1, NULL, 0, NULL, NULL);
 666
 667         if(size <= *cbSize) {
 668             WideCharToMultiByte(CP_ACP, 0, user_agent, -1, pcszUAOut, *cbSize, NULL, NULL);
 669             hres = S_OK;
 670         }else {
 671             hres = E_OUTOFMEMORY;
 672         }
 673
 674         *cbSize = size;
 675     }
 676
 677     LeaveCriticalSection(&session_cs);
 678     return hres;
 679 }
 680
 681 void free_session(void)
 682 {
 683     heap_free(user_agent);
 684 }