| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | #include "precomp.h" |
| 4 | |
| 5 | |
| 6 | // Exit macros |
| 7 | #define RssExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 8 | #define RssExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 9 | #define RssExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 10 | #define RssExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 11 | #define RssExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 12 | #define RssExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_RSSUTIL, x, s, __VA_ARGS__) |
| 13 | #define RssExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_RSSUTIL, p, x, e, s, __VA_ARGS__) |
| 14 | #define RssExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_RSSUTIL, p, x, s, __VA_ARGS__) |
| 15 | #define RssExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_RSSUTIL, p, x, e, s, __VA_ARGS__) |
| 16 | #define RssExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_RSSUTIL, p, x, s, __VA_ARGS__) |
| 17 | #define RssExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_RSSUTIL, e, x, s, __VA_ARGS__) |
| 18 | #define RssExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_RSSUTIL, g, x, s, __VA_ARGS__) |
| 19 | |
| 20 | static HRESULT ParseRssDocument( |
| 21 | __in IXMLDOMDocument *pixd, |
| 22 | __out RSS_CHANNEL **ppChannel |
| 23 | ); |
| 24 | static HRESULT ParseRssChannel( |
| 25 | __in IXMLDOMNode *pixnChannel, |
| 26 | __out RSS_CHANNEL **ppChannel |
| 27 | ); |
| 28 | static HRESULT ParseRssItem( |
| 29 | __in IXMLDOMNode *pixnItem, |
| 30 | __in DWORD cItem, |
| 31 | __in_xcount(pChannel->cItems) RSS_CHANNEL *pChannel |
| 32 | ); |
| 33 | static HRESULT ParseRssUnknownElement( |
| 34 | __in IXMLDOMNode *pNode, |
| 35 | __inout RSS_UNKNOWN_ELEMENT** ppUnknownElement |
| 36 | ); |
| 37 | static HRESULT ParseRssUnknownAttribute( |
| 38 | __in IXMLDOMNode *pNode, |
| 39 | __inout RSS_UNKNOWN_ATTRIBUTE** ppUnknownAttribute |
| 40 | ); |
| 41 | static void FreeRssUnknownElementList( |
| 42 | __in_opt RSS_UNKNOWN_ELEMENT* pUnknownElement |
| 43 | ); |
| 44 | static void FreeRssUnknownAttributeList( |
| 45 | __in_opt RSS_UNKNOWN_ATTRIBUTE* pUnknownAttribute |
| 46 | ); |
| 47 | |
| 48 | |
| 49 | /******************************************************************** |
| 50 | RssInitialize - Initialize RSS utilities. |
| 51 | |
| 52 | *********************************************************************/ |
| 53 | extern "C" HRESULT DAPI RssInitialize() |
| 54 | { |
| 55 | return XmlInitialize(); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | /******************************************************************** |
| 60 | RssUninitialize - Uninitialize RSS utilities. |
| 61 | |
| 62 | *********************************************************************/ |
| 63 | extern "C" void DAPI RssUninitialize() |
| 64 | { |
| 65 | XmlUninitialize(); |
| 66 | } |
| 67 | |
| 68 | |
| 69 | /******************************************************************** |
| 70 | RssParseFromString - parses out an RSS channel from a string. |
| 71 | |
| 72 | *********************************************************************/ |
| 73 | extern "C" HRESULT DAPI RssParseFromString( |
| 74 | __in_z LPCWSTR wzRssString, |
| 75 | __out RSS_CHANNEL **ppChannel |
| 76 | ) |
| 77 | { |
| 78 | Assert(wzRssString); |
| 79 | Assert(ppChannel); |
| 80 | |
| 81 | HRESULT hr = S_OK; |
| 82 | RSS_CHANNEL *pNewChannel = NULL; |
| 83 | IXMLDOMDocument *pixdRss = NULL; |
| 84 | |
| 85 | hr = XmlLoadDocument(wzRssString, &pixdRss); |
| 86 | RssExitOnFailure(hr, "Failed to load RSS string as XML document."); |
| 87 | |
| 88 | hr = ParseRssDocument(pixdRss, &pNewChannel); |
| 89 | RssExitOnFailure(hr, "Failed to parse RSS document."); |
| 90 | |
| 91 | *ppChannel = pNewChannel; |
| 92 | pNewChannel = NULL; |
| 93 | |
| 94 | LExit: |
| 95 | ReleaseObject(pixdRss); |
| 96 | |
| 97 | ReleaseRssChannel(pNewChannel); |
| 98 | |
| 99 | return hr; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | /******************************************************************** |
| 104 | RssParseFromFile - parses out an RSS channel from a file path. |
| 105 | |
| 106 | *********************************************************************/ |
| 107 | extern "C" HRESULT DAPI RssParseFromFile( |
| 108 | __in_z LPCWSTR wzRssFile, |
| 109 | __out RSS_CHANNEL **ppChannel |
| 110 | ) |
| 111 | { |
| 112 | Assert(wzRssFile); |
| 113 | Assert(ppChannel); |
| 114 | |
| 115 | HRESULT hr = S_OK; |
| 116 | RSS_CHANNEL *pNewChannel = NULL; |
| 117 | IXMLDOMDocument *pixdRss = NULL; |
| 118 | |
| 119 | hr = XmlLoadDocumentFromFile(wzRssFile, &pixdRss); |
| 120 | RssExitOnFailure(hr, "Failed to load RSS string as XML document."); |
| 121 | |
| 122 | hr = ParseRssDocument(pixdRss, &pNewChannel); |
| 123 | RssExitOnFailure(hr, "Failed to parse RSS document."); |
| 124 | |
| 125 | *ppChannel = pNewChannel; |
| 126 | pNewChannel = NULL; |
| 127 | |
| 128 | LExit: |
| 129 | ReleaseObject(pixdRss); |
| 130 | |
| 131 | ReleaseRssChannel(pNewChannel); |
| 132 | |
| 133 | return hr; |
| 134 | } |
| 135 | |
| 136 | |
| 137 | /******************************************************************** |
| 138 | RssFreeChannel - parses out an RSS channel from a string. |
| 139 | |
| 140 | *********************************************************************/ |
| 141 | extern "C" void DAPI RssFreeChannel( |
| 142 | __in_xcount(pChannel->cItems) RSS_CHANNEL *pChannel |
| 143 | ) |
| 144 | { |
| 145 | if (pChannel) |
| 146 | { |
| 147 | for (DWORD i = 0; i < pChannel->cItems; ++i) |
| 148 | { |
| 149 | ReleaseStr(pChannel->rgItems[i].wzTitle); |
| 150 | ReleaseStr(pChannel->rgItems[i].wzLink); |
| 151 | ReleaseStr(pChannel->rgItems[i].wzDescription); |
| 152 | ReleaseStr(pChannel->rgItems[i].wzGuid); |
| 153 | ReleaseStr(pChannel->rgItems[i].wzEnclosureUrl); |
| 154 | ReleaseStr(pChannel->rgItems[i].wzEnclosureType); |
| 155 | |
| 156 | FreeRssUnknownElementList(pChannel->rgItems[i].pUnknownElements); |
| 157 | } |
| 158 | |
| 159 | ReleaseStr(pChannel->wzTitle); |
| 160 | ReleaseStr(pChannel->wzLink); |
| 161 | ReleaseStr(pChannel->wzDescription); |
| 162 | FreeRssUnknownElementList(pChannel->pUnknownElements); |
| 163 | |
| 164 | MemFree(pChannel); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | |
| 169 | /******************************************************************** |
| 170 | ParseRssDocument - parses out an RSS channel from a loaded XML DOM document. |
| 171 | |
| 172 | *********************************************************************/ |
| 173 | static HRESULT ParseRssDocument( |
| 174 | __in IXMLDOMDocument *pixd, |
| 175 | __out RSS_CHANNEL **ppChannel |
| 176 | ) |
| 177 | { |
| 178 | Assert(pixd); |
| 179 | Assert(ppChannel); |
| 180 | |
| 181 | HRESULT hr = S_OK; |
| 182 | IXMLDOMElement *pRssElement = NULL; |
| 183 | IXMLDOMNodeList *pChannelNodes = NULL; |
| 184 | IXMLDOMNode *pNode = NULL; |
| 185 | BSTR bstrNodeName = NULL; |
| 186 | |
| 187 | RSS_CHANNEL *pNewChannel = NULL; |
| 188 | |
| 189 | // |
| 190 | // Get the document element and start processing channels. |
| 191 | // |
| 192 | hr = pixd ->get_documentElement(&pRssElement); |
| 193 | RssExitOnFailure(hr, "failed get_documentElement in ParseRssDocument"); |
| 194 | |
| 195 | hr = pRssElement->get_childNodes(&pChannelNodes); |
| 196 | RssExitOnFailure(hr, "Failed to get child nodes of Rss Document element."); |
| 197 | |
| 198 | while (S_OK == (hr = XmlNextElement(pChannelNodes, &pNode, &bstrNodeName))) |
| 199 | { |
| 200 | if (0 == lstrcmpW(bstrNodeName, L"channel")) |
| 201 | { |
| 202 | hr = ParseRssChannel(pNode, &pNewChannel); |
| 203 | RssExitOnFailure(hr, "Failed to parse RSS channel."); |
| 204 | } |
| 205 | else if (0 == lstrcmpW(bstrNodeName, L"link")) |
| 206 | { |
| 207 | } |
| 208 | |
| 209 | ReleaseNullBSTR(bstrNodeName); |
| 210 | ReleaseNullObject(pNode); |
| 211 | } |
| 212 | |
| 213 | if (S_FALSE == hr) |
| 214 | { |
| 215 | hr = S_OK; |
| 216 | } |
| 217 | |
| 218 | *ppChannel = pNewChannel; |
| 219 | pNewChannel = NULL; |
| 220 | |
| 221 | LExit: |
| 222 | ReleaseBSTR(bstrNodeName); |
| 223 | ReleaseObject(pNode); |
| 224 | ReleaseObject(pChannelNodes); |
| 225 | ReleaseObject(pRssElement); |
| 226 | |
| 227 | ReleaseRssChannel(pNewChannel); |
| 228 | |
| 229 | return hr; |
| 230 | } |
| 231 | |
| 232 | |
| 233 | /******************************************************************** |
| 234 | ParseRssChannel - parses out an RSS channel from a loaded XML DOM element. |
| 235 | |
| 236 | *********************************************************************/ |
| 237 | static HRESULT ParseRssChannel( |
| 238 | __in IXMLDOMNode *pixnChannel, |
| 239 | __out RSS_CHANNEL **ppChannel |
| 240 | ) |
| 241 | { |
| 242 | Assert(pixnChannel); |
| 243 | Assert(ppChannel); |
| 244 | |
| 245 | HRESULT hr = S_OK; |
| 246 | IXMLDOMNodeList *pNodeList = NULL; |
| 247 | |
| 248 | RSS_CHANNEL *pNewChannel = NULL; |
| 249 | long cItems = 0; |
| 250 | |
| 251 | IXMLDOMNode *pNode = NULL; |
| 252 | BSTR bstrNodeName = NULL; |
| 253 | BSTR bstrNodeValue = NULL; |
| 254 | |
| 255 | // |
| 256 | // First, calculate how many RSS items we're going to have and allocate |
| 257 | // the RSS_CHANNEL structure |
| 258 | // |
| 259 | hr = XmlSelectNodes(pixnChannel, L"item", &pNodeList); |
| 260 | RssExitOnFailure(hr, "Failed to select all RSS items in an RSS channel."); |
| 261 | |
| 262 | hr = pNodeList->get_length(&cItems); |
| 263 | RssExitOnFailure(hr, "Failed to count the number of RSS items in RSS channel."); |
| 264 | |
| 265 | pNewChannel = static_cast<RSS_CHANNEL*>(MemAlloc(sizeof(RSS_CHANNEL) + sizeof(RSS_ITEM) * cItems, TRUE)); |
| 266 | RssExitOnNull(pNewChannel, hr, E_OUTOFMEMORY, "Failed to allocate RSS channel structure."); |
| 267 | |
| 268 | pNewChannel->cItems = cItems; |
| 269 | |
| 270 | // |
| 271 | // Process the elements under a channel now. |
| 272 | // |
| 273 | hr = pixnChannel->get_childNodes(&pNodeList); |
| 274 | RssExitOnFailure(hr, "Failed to get child nodes of RSS channel element."); |
| 275 | |
| 276 | cItems = 0; // reset the counter and use this to walk through the channel items |
| 277 | while (S_OK == (hr = XmlNextElement(pNodeList, &pNode, &bstrNodeName))) |
| 278 | { |
| 279 | if (0 == lstrcmpW(bstrNodeName, L"title")) |
| 280 | { |
| 281 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 282 | RssExitOnFailure(hr, "Failed to get RSS channel title."); |
| 283 | |
| 284 | hr = StrAllocString(&pNewChannel->wzTitle, bstrNodeValue, 0); |
| 285 | RssExitOnFailure(hr, "Failed to allocate RSS channel title."); |
| 286 | } |
| 287 | else if (0 == lstrcmpW(bstrNodeName, L"link")) |
| 288 | { |
| 289 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 290 | RssExitOnFailure(hr, "Failed to get RSS channel link."); |
| 291 | |
| 292 | hr = StrAllocString(&pNewChannel->wzLink, bstrNodeValue, 0); |
| 293 | RssExitOnFailure(hr, "Failed to allocate RSS channel link."); |
| 294 | } |
| 295 | else if (0 == lstrcmpW(bstrNodeName, L"description")) |
| 296 | { |
| 297 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 298 | RssExitOnFailure(hr, "Failed to get RSS channel description."); |
| 299 | |
| 300 | hr = StrAllocString(&pNewChannel->wzDescription, bstrNodeValue, 0); |
| 301 | RssExitOnFailure(hr, "Failed to allocate RSS channel description."); |
| 302 | } |
| 303 | else if (0 == lstrcmpW(bstrNodeName, L"ttl")) |
| 304 | { |
| 305 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 306 | RssExitOnFailure(hr, "Failed to get RSS channel description."); |
| 307 | |
| 308 | pNewChannel->dwTimeToLive = (DWORD)wcstoul(bstrNodeValue, NULL, 10); |
| 309 | } |
| 310 | else if (0 == lstrcmpW(bstrNodeName, L"item")) |
| 311 | { |
| 312 | hr = ParseRssItem(pNode, cItems, pNewChannel); |
| 313 | RssExitOnFailure(hr, "Failed to parse RSS item."); |
| 314 | |
| 315 | ++cItems; |
| 316 | } |
| 317 | else |
| 318 | { |
| 319 | hr = ParseRssUnknownElement(pNode, &pNewChannel->pUnknownElements); |
| 320 | RssExitOnFailure(hr, "Failed to parse unknown RSS channel element: %ls", bstrNodeName); |
| 321 | } |
| 322 | |
| 323 | ReleaseNullBSTR(bstrNodeValue); |
| 324 | ReleaseNullBSTR(bstrNodeName); |
| 325 | ReleaseNullObject(pNode); |
| 326 | } |
| 327 | |
| 328 | *ppChannel = pNewChannel; |
| 329 | pNewChannel = NULL; |
| 330 | |
| 331 | LExit: |
| 332 | ReleaseBSTR(bstrNodeName); |
| 333 | ReleaseObject(pNode); |
| 334 | ReleaseObject(pNodeList); |
| 335 | |
| 336 | ReleaseRssChannel(pNewChannel); |
| 337 | |
| 338 | return hr; |
| 339 | } |
| 340 | |
| 341 | |
| 342 | /******************************************************************** |
| 343 | ParseRssItem - parses out an RSS item from a loaded XML DOM node. |
| 344 | |
| 345 | *********************************************************************/ |
| 346 | static HRESULT ParseRssItem( |
| 347 | __in IXMLDOMNode *pixnItem, |
| 348 | __in DWORD cItem, |
| 349 | __in_xcount(pChannel->cItems) RSS_CHANNEL *pChannel |
| 350 | ) |
| 351 | { |
| 352 | HRESULT hr = S_OK; |
| 353 | |
| 354 | RSS_ITEM *pItem = NULL; |
| 355 | IXMLDOMNodeList *pNodeList = NULL; |
| 356 | |
| 357 | IXMLDOMNode *pNode = NULL; |
| 358 | BSTR bstrNodeName = NULL; |
| 359 | BSTR bstrNodeValue = NULL; |
| 360 | |
| 361 | // |
| 362 | // First make sure we're dealing with a valid item. |
| 363 | // |
| 364 | if (pChannel->cItems <= cItem) |
| 365 | { |
| 366 | hr = E_UNEXPECTED; |
| 367 | RssExitOnFailure(hr, "Unexpected number of items parsed."); |
| 368 | } |
| 369 | |
| 370 | pItem = pChannel->rgItems + cItem; |
| 371 | |
| 372 | // |
| 373 | // Process the elements under an item now. |
| 374 | // |
| 375 | hr = pixnItem->get_childNodes(&pNodeList); |
| 376 | RssExitOnFailure(hr, "Failed to get child nodes of RSS item element."); |
| 377 | while (S_OK == (hr = XmlNextElement(pNodeList, &pNode, &bstrNodeName))) |
| 378 | { |
| 379 | if (0 == lstrcmpW(bstrNodeName, L"title")) |
| 380 | { |
| 381 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 382 | RssExitOnFailure(hr, "Failed to get RSS channel title."); |
| 383 | |
| 384 | hr = StrAllocString(&pItem->wzTitle, bstrNodeValue, 0); |
| 385 | RssExitOnFailure(hr, "Failed to allocate RSS item title."); |
| 386 | } |
| 387 | else if (0 == lstrcmpW(bstrNodeName, L"link")) |
| 388 | { |
| 389 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 390 | RssExitOnFailure(hr, "Failed to get RSS channel link."); |
| 391 | |
| 392 | hr = StrAllocString(&pItem->wzLink, bstrNodeValue, 0); |
| 393 | RssExitOnFailure(hr, "Failed to allocate RSS item link."); |
| 394 | } |
| 395 | else if (0 == lstrcmpW(bstrNodeName, L"description")) |
| 396 | { |
| 397 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 398 | RssExitOnFailure(hr, "Failed to get RSS item description."); |
| 399 | |
| 400 | hr = StrAllocString(&pItem->wzDescription, bstrNodeValue, 0); |
| 401 | RssExitOnFailure(hr, "Failed to allocate RSS item description."); |
| 402 | } |
| 403 | else if (0 == lstrcmpW(bstrNodeName, L"guid")) |
| 404 | { |
| 405 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 406 | RssExitOnFailure(hr, "Failed to get RSS item guid."); |
| 407 | |
| 408 | hr = StrAllocString(&pItem->wzGuid, bstrNodeValue, 0); |
| 409 | RssExitOnFailure(hr, "Failed to allocate RSS item guid."); |
| 410 | } |
| 411 | else if (0 == lstrcmpW(bstrNodeName, L"pubDate")) |
| 412 | { |
| 413 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 414 | RssExitOnFailure(hr, "Failed to get RSS item guid."); |
| 415 | |
| 416 | hr = TimeFromString(bstrNodeValue, &pItem->ftPublished); |
| 417 | RssExitOnFailure(hr, "Failed to convert RSS item time."); |
| 418 | } |
| 419 | else if (0 == lstrcmpW(bstrNodeName, L"enclosure")) |
| 420 | { |
| 421 | hr = XmlGetAttribute(pNode, L"url", &bstrNodeValue); |
| 422 | RssExitOnFailure(hr, "Failed to get RSS item enclosure url."); |
| 423 | |
| 424 | hr = StrAllocString(&pItem->wzEnclosureUrl, bstrNodeValue, 0); |
| 425 | RssExitOnFailure(hr, "Failed to allocate RSS item enclosure url."); |
| 426 | ReleaseNullBSTR(bstrNodeValue); |
| 427 | |
| 428 | hr = XmlGetAttributeNumber(pNode, L"length", &pItem->dwEnclosureSize); |
| 429 | RssExitOnFailure(hr, "Failed to get RSS item enclosure length."); |
| 430 | |
| 431 | hr = XmlGetAttribute(pNode, L"type", &bstrNodeValue); |
| 432 | RssExitOnFailure(hr, "Failed to get RSS item enclosure type."); |
| 433 | |
| 434 | hr = StrAllocString(&pItem->wzEnclosureType, bstrNodeValue, 0); |
| 435 | RssExitOnFailure(hr, "Failed to allocate RSS item enclosure type."); |
| 436 | } |
| 437 | else |
| 438 | { |
| 439 | hr = ParseRssUnknownElement(pNode, &pItem->pUnknownElements); |
| 440 | RssExitOnFailure(hr, "Failed to parse unknown RSS item element: %ls", bstrNodeName); |
| 441 | } |
| 442 | |
| 443 | ReleaseNullBSTR(bstrNodeValue); |
| 444 | ReleaseNullBSTR(bstrNodeName); |
| 445 | ReleaseNullObject(pNode); |
| 446 | } |
| 447 | |
| 448 | LExit: |
| 449 | ReleaseBSTR(bstrNodeValue); |
| 450 | ReleaseBSTR(bstrNodeName); |
| 451 | ReleaseObject(pNode); |
| 452 | ReleaseObject(pNodeList); |
| 453 | |
| 454 | return hr; |
| 455 | } |
| 456 | |
| 457 | |
| 458 | /******************************************************************** |
| 459 | ParseRssUnknownElement - parses out an unknown item from the RSS feed from a loaded XML DOM node. |
| 460 | |
| 461 | *********************************************************************/ |
| 462 | static HRESULT ParseRssUnknownElement( |
| 463 | __in IXMLDOMNode *pNode, |
| 464 | __inout RSS_UNKNOWN_ELEMENT** ppUnknownElement |
| 465 | ) |
| 466 | { |
| 467 | Assert(ppUnknownElement); |
| 468 | |
| 469 | HRESULT hr = S_OK; |
| 470 | BSTR bstrNodeNamespace = NULL; |
| 471 | BSTR bstrNodeName = NULL; |
| 472 | BSTR bstrNodeValue = NULL; |
| 473 | IXMLDOMNamedNodeMap* pixnnmAttributes = NULL; |
| 474 | IXMLDOMNode* pixnAttribute = NULL; |
| 475 | RSS_UNKNOWN_ELEMENT* pNewUnknownElement; |
| 476 | |
| 477 | pNewUnknownElement = static_cast<RSS_UNKNOWN_ELEMENT*>(MemAlloc(sizeof(RSS_UNKNOWN_ELEMENT), TRUE)); |
| 478 | RssExitOnNull(pNewUnknownElement, hr, E_OUTOFMEMORY, "Failed to allocate unknown element."); |
| 479 | |
| 480 | hr = pNode->get_namespaceURI(&bstrNodeNamespace); |
| 481 | if (S_OK == hr) |
| 482 | { |
| 483 | hr = StrAllocString(&pNewUnknownElement->wzNamespace, bstrNodeNamespace, 0); |
| 484 | RssExitOnFailure(hr, "Failed to allocate RSS unknown element namespace."); |
| 485 | } |
| 486 | else if (S_FALSE == hr) |
| 487 | { |
| 488 | hr = S_OK; |
| 489 | } |
| 490 | RssExitOnFailure(hr, "Failed to get unknown element namespace."); |
| 491 | |
| 492 | hr = pNode->get_baseName(&bstrNodeName); |
| 493 | RssExitOnFailure(hr, "Failed to get unknown element name."); |
| 494 | |
| 495 | hr = StrAllocString(&pNewUnknownElement->wzElement, bstrNodeName, 0); |
| 496 | RssExitOnFailure(hr, "Failed to allocate RSS unknown element name."); |
| 497 | |
| 498 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 499 | RssExitOnFailure(hr, "Failed to get unknown element value."); |
| 500 | |
| 501 | hr = StrAllocString(&pNewUnknownElement->wzValue, bstrNodeValue, 0); |
| 502 | RssExitOnFailure(hr, "Failed to allocate RSS unknown element value."); |
| 503 | |
| 504 | hr = pNode->get_attributes(&pixnnmAttributes); |
| 505 | RssExitOnFailure(hr, "Failed get attributes on RSS unknown element."); |
| 506 | |
| 507 | while (S_OK == (hr = pixnnmAttributes->nextNode(&pixnAttribute))) |
| 508 | { |
| 509 | hr = ParseRssUnknownAttribute(pixnAttribute, &pNewUnknownElement->pAttributes); |
| 510 | RssExitOnFailure(hr, "Failed to parse attribute on RSS unknown element."); |
| 511 | |
| 512 | ReleaseNullObject(pixnAttribute); |
| 513 | } |
| 514 | |
| 515 | if (S_FALSE == hr) |
| 516 | { |
| 517 | hr = S_OK; |
| 518 | } |
| 519 | RssExitOnFailure(hr, "Failed to enumerate all attributes on RSS unknown element."); |
| 520 | |
| 521 | RSS_UNKNOWN_ELEMENT** ppTail = ppUnknownElement; |
| 522 | while (*ppTail) |
| 523 | { |
| 524 | ppTail = &(*ppTail)->pNext; |
| 525 | } |
| 526 | |
| 527 | *ppTail = pNewUnknownElement; |
| 528 | pNewUnknownElement = NULL; |
| 529 | |
| 530 | LExit: |
| 531 | FreeRssUnknownElementList(pNewUnknownElement); |
| 532 | |
| 533 | ReleaseBSTR(bstrNodeNamespace); |
| 534 | ReleaseBSTR(bstrNodeName); |
| 535 | ReleaseBSTR(bstrNodeValue); |
| 536 | ReleaseObject(pixnnmAttributes); |
| 537 | ReleaseObject(pixnAttribute); |
| 538 | |
| 539 | return hr; |
| 540 | } |
| 541 | |
| 542 | |
| 543 | /******************************************************************** |
| 544 | ParseRssUnknownAttribute - parses out attribute from an unknown element |
| 545 | |
| 546 | *********************************************************************/ |
| 547 | static HRESULT ParseRssUnknownAttribute( |
| 548 | __in IXMLDOMNode *pNode, |
| 549 | __inout RSS_UNKNOWN_ATTRIBUTE** ppUnknownAttribute |
| 550 | ) |
| 551 | { |
| 552 | Assert(ppUnknownAttribute); |
| 553 | |
| 554 | HRESULT hr = S_OK; |
| 555 | BSTR bstrNodeNamespace = NULL; |
| 556 | BSTR bstrNodeName = NULL; |
| 557 | BSTR bstrNodeValue = NULL; |
| 558 | RSS_UNKNOWN_ATTRIBUTE* pNewUnknownAttribute; |
| 559 | |
| 560 | pNewUnknownAttribute = static_cast<RSS_UNKNOWN_ATTRIBUTE*>(MemAlloc(sizeof(RSS_UNKNOWN_ATTRIBUTE), TRUE)); |
| 561 | RssExitOnNull(pNewUnknownAttribute, hr, E_OUTOFMEMORY, "Failed to allocate unknown attribute."); |
| 562 | |
| 563 | hr = pNode->get_namespaceURI(&bstrNodeNamespace); |
| 564 | if (S_OK == hr) |
| 565 | { |
| 566 | hr = StrAllocString(&pNewUnknownAttribute->wzNamespace, bstrNodeNamespace, 0); |
| 567 | RssExitOnFailure(hr, "Failed to allocate RSS unknown attribute namespace."); |
| 568 | } |
| 569 | else if (S_FALSE == hr) |
| 570 | { |
| 571 | hr = S_OK; |
| 572 | } |
| 573 | RssExitOnFailure(hr, "Failed to get unknown attribute namespace."); |
| 574 | |
| 575 | hr = pNode->get_baseName(&bstrNodeName); |
| 576 | RssExitOnFailure(hr, "Failed to get unknown attribute name."); |
| 577 | |
| 578 | hr = StrAllocString(&pNewUnknownAttribute->wzAttribute, bstrNodeName, 0); |
| 579 | RssExitOnFailure(hr, "Failed to allocate RSS unknown attribute name."); |
| 580 | |
| 581 | hr = XmlGetText(pNode, &bstrNodeValue); |
| 582 | RssExitOnFailure(hr, "Failed to get unknown attribute value."); |
| 583 | |
| 584 | hr = StrAllocString(&pNewUnknownAttribute->wzValue, bstrNodeValue, 0); |
| 585 | RssExitOnFailure(hr, "Failed to allocate RSS unknown attribute value."); |
| 586 | |
| 587 | RSS_UNKNOWN_ATTRIBUTE** ppTail = ppUnknownAttribute; |
| 588 | while (*ppTail) |
| 589 | { |
| 590 | ppTail = &(*ppTail)->pNext; |
| 591 | } |
| 592 | |
| 593 | *ppTail = pNewUnknownAttribute; |
| 594 | pNewUnknownAttribute = NULL; |
| 595 | |
| 596 | LExit: |
| 597 | FreeRssUnknownAttributeList(pNewUnknownAttribute); |
| 598 | |
| 599 | ReleaseBSTR(bstrNodeNamespace); |
| 600 | ReleaseBSTR(bstrNodeName); |
| 601 | ReleaseBSTR(bstrNodeValue); |
| 602 | |
| 603 | return hr; |
| 604 | } |
| 605 | |
| 606 | |
| 607 | /******************************************************************** |
| 608 | FreeRssUnknownElement - releases all of the memory used by a list of unknown elements |
| 609 | |
| 610 | *********************************************************************/ |
| 611 | static void FreeRssUnknownElementList( |
| 612 | __in_opt RSS_UNKNOWN_ELEMENT* pUnknownElement |
| 613 | ) |
| 614 | { |
| 615 | while (pUnknownElement) |
| 616 | { |
| 617 | RSS_UNKNOWN_ELEMENT* pFree = pUnknownElement; |
| 618 | pUnknownElement = pUnknownElement->pNext; |
| 619 | |
| 620 | FreeRssUnknownAttributeList(pFree->pAttributes); |
| 621 | ReleaseStr(pFree->wzNamespace); |
| 622 | ReleaseStr(pFree->wzElement); |
| 623 | ReleaseStr(pFree->wzValue); |
| 624 | MemFree(pFree); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | |
| 629 | /******************************************************************** |
| 630 | FreeRssUnknownAttribute - releases all of the memory used by a list of unknown attributes |
| 631 | |
| 632 | *********************************************************************/ |
| 633 | static void FreeRssUnknownAttributeList( |
| 634 | __in_opt RSS_UNKNOWN_ATTRIBUTE* pUnknownAttribute |
| 635 | ) |
| 636 | { |
| 637 | while (pUnknownAttribute) |
| 638 | { |
| 639 | RSS_UNKNOWN_ATTRIBUTE* pFree = pUnknownAttribute; |
| 640 | pUnknownAttribute = pUnknownAttribute->pNext; |
| 641 | |
| 642 | ReleaseStr(pFree->wzNamespace); |
| 643 | ReleaseStr(pFree->wzAttribute); |
| 644 | ReleaseStr(pFree->wzValue); |
| 645 | MemFree(pFree); |
| 646 | } |
| 647 | } |