Diodia Software - RssXml.cpp

/****************************************************************************/

/** **/

/** Use in any form with or without modification for commercial and non- **/

/** commercial purposes is permitted. **/

/** **/

/****************************************************************************/

#include "stdafx.h"

#include "XmlHelpers.h"

#include "RssHelpers.h"

#include "RssFeedC.h"

static bool IsElementNode(IXMLDOMNode *FeedNode);

static bool IsRdfTagName(const char *TagName);

static bool IsRssTagName(const char *TagName);

static bool UpdateRss10Feed(RssFeedC *Feed, IXMLDOMNode *FeedNode);

static bool UpdateRss20Feed(RssFeedC *Feed, IXMLDOMNode *FeedNode);

/****************************************************************************/

/* DESCRIPTION : Update RSS feed.

/* RETURN VALUE: true - if OK

/* false - if error

/****************************************************************************/

bool UpdateRssFeed(RssFeedC *Feed)

{

IXMLDOMDocument *XmlDoc;

IXMLDOMNode *DocNode;

IXMLDOMNode *FeedNode;

IXMLDOMNode *TmpNode;

std::string TagName;

int Idx;

HRESULT Result;

bool Res;

for (Idx = 0; Idx < Feed->GetNoOfItems(); Idx++)

Feed->GetNthItem(Idx)->SetIsOld(true);

XmlDoc = CreateXmlDocument(false, L"");

if (!XmlDoc)

return false;

if (!ReadXmlDocument(XmlDoc, Feed->GetUrl()))

{

XmlDoc->Release();

return false;

}

DocNode = SelectXmlNode(XmlDoc, "/");

if (!DocNode)

{

XmlDoc->Release();

return false;

}

Result = DocNode->get_firstChild(&FeedNode);

DocNode->Release();

if (FAILED(Result) || !FeedNode)

{

XmlDoc->Release();

return false;

}

TagName = GetXmlNodeTagName(FeedNode);

while(!IsElementNode(FeedNode) || (!IsRdfTagName(TagName.c_str()) && !IsRssTagName(TagName.c_str())))

{

FeedNode->get_nextSibling(&TmpNode);

FeedNode->Release();

if (FAILED(Result) || !TmpNode)

{

XmlDoc->Release();

return false;

}

FeedNode = TmpNode;

TagName = GetXmlNodeTagName(FeedNode);

}

if (IsRdfTagName(TagName.c_str()))

{

SetXmlXPathSelections(XmlDoc, L"xmlns:rss='http://purl.org/rss/1.0/' xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:ms='urn:schemas-microsoft-com:xslt'");

Res = UpdateRss10Feed(Feed, FeedNode);

}

else

{

Res = UpdateRss20Feed(Feed, FeedNode);

}

FeedNode->Release();

XmlDoc->Release();

Feed->DeleteOldItems();

return Res;

}

/****************************************************************************/

/* DESCRIPTION : Check if node type is "element".

/* RETURN VALUE: true - if it is

/* false - otherwise

/****************************************************************************/

static bool IsElementNode(IXMLDOMNode *Node)

{

DOMNodeType Type;

HRESULT Result;

Result = Node->get_nodeType(&Type);

if (FAILED(Result) || Type != NODE_ELEMENT)

return false;

return true;

}

/****************************************************************************/

/* DESCRIPTION : Check if tag name is "rdf".

/* RETURN VALUE: true - if it is

/* false - otherwise

/****************************************************************************/

static bool IsRdfTagName(const char *TagName)

{

CString LowerName = TagName;

int Pos;

LowerName.MakeLower();

Pos = LowerName.ReverseFind(':');

if (Pos >= 0)

return strcmp(LowerName.Right((int) strlen(LowerName) - Pos - 1), "rdf") == 0;

return strcmp(LowerName, "rdf") == 0;

}

/****************************************************************************/

/* DESCRIPTION : Check if tag name is "rss".

/* RETURN VALUE: true - if it is

/* false - otherwise

/****************************************************************************/

static bool IsRssTagName(const char *TagName)

{

CString LowerName = TagName;

int Pos;

LowerName.MakeLower();

Pos = LowerName.ReverseFind(':');

if (Pos >= 0)

return strcmp(LowerName.Right((int) strlen(LowerName) - Pos - 1), "rss") == 0;

return strcmp(LowerName, "rss") == 0;

}

/****************************************************************************/

/* DESCRIPTION : Update RSS 1.0 feed.

/* RETURN VALUE: true - if OK

/* false - if error

/****************************************************************************/

static bool UpdateRss10Feed(RssFeedC *Feed, IXMLDOMNode *FeedNode)

{

IXMLDOMNodeList *ItemNodes;

IXMLDOMNode *ChannelNode;

IXMLDOMNode *TitleNode;

IXMLDOMNode *LinkNode;

IXMLDOMNode *DescriptionNode;

IXMLDOMNode *ItemNode;

IXMLDOMNode *DateNode;

RssItemC *Item;

long Index;

long Length;

HRESULT Result;

ChannelNode = SelectXmlNode(FeedNode, "child::rss:channel[position()=1]");

if (!ChannelNode)

return false;

TitleNode = SelectXmlNode(ChannelNode, "child::rss:title[position()=1]");

if (TitleNode)

{

Feed->SetTitle(GetXmlNodeText(TitleNode).c_str());

TitleNode->Release();

}

LinkNode = SelectXmlNode(ChannelNode, "child::rss:link[position()=1]");

if (LinkNode)

{

Feed->SetLink(GetXmlNodeText(LinkNode).c_str());

LinkNode->Release();

}

DescriptionNode = SelectXmlNode(ChannelNode, "child::rss:description[position()=1]");

if (DescriptionNode)

{

Feed->SetDescription(GetXmlNodeText(DescriptionNode).c_str());

DescriptionNode->Release();

}

ItemNodes = SelectXmlNodes(FeedNode, "child::rss:item", &Length);

if (ItemNodes)

{

for (Index = 0; Index < Length; Index++)

{

ItemNode = NULL;

Result = ItemNodes->get_item(Index, &ItemNode);

if (FAILED(Result) || !ItemNode)

continue;

TitleNode = SelectXmlNode(ItemNode, "child::rss:title[position()=1]");

if (!TitleNode)

{

ItemNode->Release();

continue;

}

if (GetXmlNodeText(TitleNode).empty())

{

TitleNode->Release();

continue;

}

Item = Feed->AddItem(NormalizeText(GetXmlNodeText(TitleNode)).c_str());

TitleNode->Release();

LinkNode = SelectXmlNode(ItemNode, "child::rss:link[position()=1]");

if (LinkNode)

{

Item->SetLink(GetXmlNodeText(LinkNode).c_str());

LinkNode->Release();

}

DescriptionNode = SelectXmlNode(ItemNode, "child::rss:description[position()=1]");

if (DescriptionNode)

{

if (GetXmlNodeText(DescriptionNode).empty())

Item->SetDescription(Item->GetTitle());

else

Item->SetDescription(GetXmlNodeText(DescriptionNode).c_str());

DescriptionNode->Release();

}

else

{

Item->SetDescription(Item->GetTitle());

}

DateNode = SelectXmlNode(ItemNode, "child::dc:date[position()=1]");

if (DateNode)

{

Item->SetDate(GetXmlNodeText(DateNode).c_str());

DateNode->Release();

}

ItemNode->Release();

}

ItemNodes->Release();

}

ChannelNode->Release();

return true;

}

/****************************************************************************/

/* DESCRIPTION : Update RSS 2.0 feed.

/* RETURN VALUE: true - if OK

/* false - if error

/****************************************************************************/

static bool UpdateRss20Feed(RssFeedC *Feed, IXMLDOMNode *FeedNode)

{

IXMLDOMNodeList *ItemNodes;

IXMLDOMNode *ChannelNode;

IXMLDOMNode *TitleNode;

IXMLDOMNode *LinkNode;

IXMLDOMNode *DescriptionNode;

IXMLDOMNode *ItemNode;

IXMLDOMNode *DateNode;

RssItemC *Item;

long Index;

long Length;

HRESULT Result;

ChannelNode = SelectXmlNode(FeedNode, "child::channel[position()=1]");

if (!ChannelNode)

return false;

TitleNode = SelectXmlNode(ChannelNode, "child::title[position()=1]");

if (TitleNode)

{

Feed->SetTitle(GetXmlNodeText(TitleNode).c_str());

TitleNode->Release();

}

LinkNode = SelectXmlNode(ChannelNode, "child::link[position()=1]");

if (LinkNode)

{

Feed->SetLink(GetXmlNodeText(LinkNode).c_str());

LinkNode->Release();

}

DescriptionNode = SelectXmlNode(ChannelNode, "child::description[position()=1]");

if (DescriptionNode)

{

Feed->SetDescription(GetXmlNodeText(DescriptionNode).c_str());

DescriptionNode->Release();

}

ItemNodes = SelectXmlNodes(ChannelNode, "child::item", &Length);

if (ItemNodes)

{

for (Index = 0; Index < Length; Index++)

{

ItemNode = NULL;

Result = ItemNodes->get_item(Index, &ItemNode);

if (FAILED(Result) || !ItemNode)

continue;

TitleNode = SelectXmlNode(ItemNode, "child::title[position()=1]");

if (!TitleNode)

{

ItemNode->Release();

continue;

}

if (GetXmlNodeText(TitleNode).empty())

{

ItemNode->Release();

TitleNode->Release();

continue;

}

Item = Feed->AddItem(GetXmlNodeText(TitleNode).c_str());

TitleNode->Release();

LinkNode = SelectXmlNode(ItemNode, "child::link[position()=1]");

if (LinkNode)

{

Item->SetLink(GetXmlNodeText(LinkNode).c_str());

LinkNode->Release();

}

DescriptionNode = SelectXmlNode(ItemNode, "child::description[position()=1]");

if (DescriptionNode)

{

if (GetXmlNodeText(DescriptionNode).empty())

Item->SetDescription(Item->GetTitle());

else

Item->SetDescription(GetXmlNodeText(DescriptionNode).c_str());

DescriptionNode->Release();

}

else

{

Item->SetDescription(Item->GetTitle());

}

DateNode = SelectXmlNode(ItemNode, "child::pubDate[position()=1]");

if (DateNode)

{

Item->SetDate(GetXmlNodeText(DateNode).c_str());

DateNode->Release();

}

ItemNode->Release();

}

ItemNodes->Release();

}

ChannelNode->Release();

return true;

}



	RssXml.cpp /**************************************************************************/ / / / Copyright (c) 2005 Diodia Software (http://www.diodia.com/) / / / / Use in any form with or without modification for commercial and non- / / commercial purposes is permitted. / / / /*************************************************************************/ #include "stdafx.h" #include "XmlHelpers.h" #include "RssHelpers.h" #include "RssFeedC.h" static bool IsElementNode(IXMLDOMNode FeedNode); static bool IsRdfTagName(const char TagName); static bool IsRssTagName(const char TagName); static bool UpdateRss10Feed(RssFeedC Feed, IXMLDOMNode FeedNode); static bool UpdateRss20Feed(RssFeedC Feed, IXMLDOMNode FeedNode); /***************************************************************************/ / /* DESCRIPTION : Update RSS feed. /* /* RETURN VALUE: true - if OK /* false - if error /* /***************************************************************************/ bool UpdateRssFeed(RssFeedC Feed) { IXMLDOMDocument XmlDoc; IXMLDOMNode DocNode; IXMLDOMNode FeedNode; IXMLDOMNode TmpNode; std::string TagName; int Idx; HRESULT Result; bool Res; for (Idx = 0; Idx < Feed->GetNoOfItems(); Idx++) Feed->GetNthItem(Idx)->SetIsOld(true); XmlDoc = CreateXmlDocument(false, L""); if (!XmlDoc) return false; if (!ReadXmlDocument(XmlDoc, Feed->GetUrl())) { XmlDoc->Release(); return false; } DocNode = SelectXmlNode(XmlDoc, "/"); if (!DocNode) { XmlDoc->Release(); return false; } Result = DocNode->get_firstChild(&FeedNode); DocNode->Release(); if (FAILED(Result) \|\| !FeedNode) { XmlDoc->Release(); return false; } TagName = GetXmlNodeTagName(FeedNode); while(!IsElementNode(FeedNode) \|\| (!IsRdfTagName(TagName.c_str()) && !IsRssTagName(TagName.c_str()))) { FeedNode->get_nextSibling(&TmpNode); FeedNode->Release(); if (FAILED(Result) \|\| !TmpNode) { XmlDoc->Release(); return false; } FeedNode = TmpNode; TagName = GetXmlNodeTagName(FeedNode); } if (IsRdfTagName(TagName.c_str())) { SetXmlXPathSelections(XmlDoc, L"xmlns:rss='http://purl.org/rss/1.0/' xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:ms='urn:schemas-microsoft-com:xslt'"); Res = UpdateRss10Feed(Feed, FeedNode); } else { Res = UpdateRss20Feed(Feed, FeedNode); } FeedNode->Release(); XmlDoc->Release(); Feed->DeleteOldItems(); return Res; } /***************************************************************************/ / /* DESCRIPTION : Check if node type is "element". /* /* RETURN VALUE: true - if it is /* false - otherwise /* /***************************************************************************/ static bool IsElementNode(IXMLDOMNode Node) { DOMNodeType Type; HRESULT Result; Result = Node->get_nodeType(&Type); if (FAILED(Result) \|\| Type != NODE_ELEMENT) return false; return true; } /***************************************************************************/ / /* DESCRIPTION : Check if tag name is "rdf". /* /* RETURN VALUE: true - if it is /* false - otherwise /* /***************************************************************************/ static bool IsRdfTagName(const char TagName) { CString LowerName = TagName; int Pos; LowerName.MakeLower(); Pos = LowerName.ReverseFind(':'); if (Pos >= 0) return strcmp(LowerName.Right((int) strlen(LowerName) - Pos - 1), "rdf") == 0; return strcmp(LowerName, "rdf") == 0; } /***************************************************************************/ / /* DESCRIPTION : Check if tag name is "rss". /* /* RETURN VALUE: true - if it is /* false - otherwise /* /***************************************************************************/ static bool IsRssTagName(const char TagName) { CString LowerName = TagName; int Pos; LowerName.MakeLower(); Pos = LowerName.ReverseFind(':'); if (Pos >= 0) return strcmp(LowerName.Right((int) strlen(LowerName) - Pos - 1), "rss") == 0; return strcmp(LowerName, "rss") == 0; } /***************************************************************************/ / /* DESCRIPTION : Update RSS 1.0 feed. /* /* RETURN VALUE: true - if OK /* false - if error /* /***************************************************************************/ static bool UpdateRss10Feed(RssFeedC Feed, IXMLDOMNode FeedNode) { IXMLDOMNodeList ItemNodes; IXMLDOMNode ChannelNode; IXMLDOMNode TitleNode; IXMLDOMNode LinkNode; IXMLDOMNode DescriptionNode; IXMLDOMNode ItemNode; IXMLDOMNode DateNode; RssItemC Item; long Index; long Length; HRESULT Result; ChannelNode = SelectXmlNode(FeedNode, "child::rss:channel[position()=1]"); if (!ChannelNode) return false; TitleNode = SelectXmlNode(ChannelNode, "child::rss:title[position()=1]"); if (TitleNode) { Feed->SetTitle(GetXmlNodeText(TitleNode).c_str()); TitleNode->Release(); } LinkNode = SelectXmlNode(ChannelNode, "child::rss:link[position()=1]"); if (LinkNode) { Feed->SetLink(GetXmlNodeText(LinkNode).c_str()); LinkNode->Release(); } DescriptionNode = SelectXmlNode(ChannelNode, "child::rss:description[position()=1]"); if (DescriptionNode) { Feed->SetDescription(GetXmlNodeText(DescriptionNode).c_str()); DescriptionNode->Release(); } ItemNodes = SelectXmlNodes(FeedNode, "child::rss:item", &Length); if (ItemNodes) { for (Index = 0; Index < Length; Index++) { ItemNode = NULL; Result = ItemNodes->get_item(Index, &ItemNode); if (FAILED(Result) \|\| !ItemNode) continue; TitleNode = SelectXmlNode(ItemNode, "child::rss:title[position()=1]"); if (!TitleNode) { ItemNode->Release(); continue; } if (GetXmlNodeText(TitleNode).empty()) { TitleNode->Release(); continue; } Item = Feed->AddItem(NormalizeText(GetXmlNodeText(TitleNode)).c_str()); TitleNode->Release(); LinkNode = SelectXmlNode(ItemNode, "child::rss:link[position()=1]"); if (LinkNode) { Item->SetLink(GetXmlNodeText(LinkNode).c_str()); LinkNode->Release(); } DescriptionNode = SelectXmlNode(ItemNode, "child::rss:description[position()=1]"); if (DescriptionNode) { if (GetXmlNodeText(DescriptionNode).empty()) Item->SetDescription(Item->GetTitle()); else Item->SetDescription(GetXmlNodeText(DescriptionNode).c_str()); DescriptionNode->Release(); } else { Item->SetDescription(Item->GetTitle()); } DateNode = SelectXmlNode(ItemNode, "child::dc:date[position()=1]"); if (DateNode) { Item->SetDate(GetXmlNodeText(DateNode).c_str()); DateNode->Release(); } ItemNode->Release(); } ItemNodes->Release(); } ChannelNode->Release(); return true; } /**************************************************************************/ / /* DESCRIPTION : Update RSS 2.0 feed. /* /* RETURN VALUE: true - if OK /* false - if error /* /***************************************************************************/ static bool UpdateRss20Feed(RssFeedC Feed, IXMLDOMNode FeedNode) { IXMLDOMNodeList ItemNodes; IXMLDOMNode ChannelNode; IXMLDOMNode TitleNode; IXMLDOMNode LinkNode; IXMLDOMNode DescriptionNode; IXMLDOMNode ItemNode; IXMLDOMNode DateNode; RssItemC *Item; long Index; long Length; HRESULT Result; ChannelNode = SelectXmlNode(FeedNode, "child::channel[position()=1]"); if (!ChannelNode) return false; TitleNode = SelectXmlNode(ChannelNode, "child::title[position()=1]"); if (TitleNode) { Feed->SetTitle(GetXmlNodeText(TitleNode).c_str()); TitleNode->Release(); } LinkNode = SelectXmlNode(ChannelNode, "child::link[position()=1]"); if (LinkNode) { Feed->SetLink(GetXmlNodeText(LinkNode).c_str()); LinkNode->Release(); } DescriptionNode = SelectXmlNode(ChannelNode, "child::description[position()=1]"); if (DescriptionNode) { Feed->SetDescription(GetXmlNodeText(DescriptionNode).c_str()); DescriptionNode->Release(); } ItemNodes = SelectXmlNodes(ChannelNode, "child::item", &Length); if (ItemNodes) { for (Index = 0; Index < Length; Index++) { ItemNode = NULL; Result = ItemNodes->get_item(Index, &ItemNode); if (FAILED(Result) \|\| !ItemNode) continue; TitleNode = SelectXmlNode(ItemNode, "child::title[position()=1]"); if (!TitleNode) { ItemNode->Release(); continue; } if (GetXmlNodeText(TitleNode).empty()) { ItemNode->Release(); TitleNode->Release(); continue; } Item = Feed->AddItem(GetXmlNodeText(TitleNode).c_str()); TitleNode->Release(); LinkNode = SelectXmlNode(ItemNode, "child::link[position()=1]"); if (LinkNode) { Item->SetLink(GetXmlNodeText(LinkNode).c_str()); LinkNode->Release(); } DescriptionNode = SelectXmlNode(ItemNode, "child::description[position()=1]"); if (DescriptionNode) { if (GetXmlNodeText(DescriptionNode).empty()) Item->SetDescription(Item->GetTitle()); else Item->SetDescription(GetXmlNodeText(DescriptionNode).c_str()); DescriptionNode->Release(); } else { Item->SetDescription(Item->GetTitle()); } DateNode = SelectXmlNode(ItemNode, "child::pubDate[position()=1]"); if (DateNode) { Item->SetDate(GetXmlNodeText(DateNode).c_str()); DateNode->Release(); } ItemNode->Release(); } ItemNodes->Release(); } ChannelNode->Release(); return true; }	Source Files Commands.cpp Context.cpp CreatePath.cpp DateParser.cpp DlgEditFeedC.cpp DlgManageFeedsC.cpp Hook.cpp Iso8601.cpp MsXmlMisc.cpp MsXmlSelect.cpp RegistryNotify.cpp RegistryUtil.cpp RSS.cpp RSS.def RSS.idl RssAction.cpp RssDownloader.cpp RssFeed.cpp RssHelpers.cpp RssInit.cpp RssItem.cpp RssMultiFeed.cpp RssTimer.cpp RssXml.cpp StdAfx.cpp Header Files Commands.h ContextC.h DateParser.h DlgEditFeedC.h DlgManageFeedsC.h Helper.h HookC.h RegistryNotify.h RegistryNotifyC.h Resource.h RssDownloaderC.h RssFeedC.h RssHelpers.h RssItemC.h RssMultiFeedC.h StdAfx.h ThreadObject.h XmlHelpers.h Resource Files about.htm DiodiaLogoSmall.gif logo.bmp manifest.xml read.bmp RSS.rc RSS.rgs ToolBandLayout.xml
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