mirror of
https://github.com/RetroShare/RetroShare.git
synced 2025-05-02 06:06:10 -04:00
FeedReader plugin
- reserved service id - reworked error codes - added xpath manipulation and basic gui elements in preview dialog git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5514 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
thunder2
parent
08904bf82f
commit
c7ed9c6df7
23 changed files with 1595 additions and 430 deletions
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@ -32,7 +32,7 @@ bool HTMLWrapper::readHTML(const char *html, const char *url)
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{
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cleanup();
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mDocument = htmlReadMemory(html, strlen(html), url, "", HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING/* | HTML_PARSE_COMPACT*/);
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mDocument = htmlReadMemory(html, strlen(html), url, "", HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING | HTML_PARSE_COMPACT | HTML_PARSE_NONET | HTML_PARSE_NOBLANKS);
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if (mDocument) {
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return true;
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}
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@ -58,3 +58,18 @@ bool HTMLWrapper::saveHTML(std::string &html)
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return false;
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}
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bool HTMLWrapper::createHTML()
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{
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/* easy way */
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return readHTML("<html><body></body></html>", "");
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}
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xmlNodePtr HTMLWrapper::getBody()
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{
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xmlNodePtr root = getRootElement();
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if (!root) {
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return NULL;
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}
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return findNode(root->children, "body", false);
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}
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@ -31,6 +31,10 @@ public:
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bool readHTML(const char *html, const char *url);
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bool saveHTML(std::string &html);
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bool createHTML();
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xmlNodePtr getBody();
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};
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#endif
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@ -23,6 +23,7 @@
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#include <string.h>
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#include "XMLWrapper.h"
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#include "XPathWrapper.h"
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XMLWrapper::XMLWrapper()
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{
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@ -41,6 +42,18 @@ XMLWrapper::~XMLWrapper()
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xmlCharEncCloseFunc(mCharEncodingHandler);
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}
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XMLWrapper &XMLWrapper::operator=(const XMLWrapper &xml)
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{
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cleanup();
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const xmlDocPtr document = xml.getDocument();
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if (document) {
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mDocument = xmlCopyDoc(document, 1);
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}
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return *this;
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}
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void XMLWrapper::cleanup()
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{
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if (mDocument) {
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@ -73,7 +86,7 @@ bool XMLWrapper::convertFromString(const char *text, xmlChar *&xmlText)
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xmlBufferPtr in = xmlBufferCreateStatic((void*) text, strlen(text));
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xmlBufferPtr out = xmlBufferCreate();
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int ret = xmlCharEncOutFunc(mCharEncodingHandler, out, in);
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int ret = xmlCharEncInFunc(mCharEncodingHandler, out, in);
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if (ret >= 0) {
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result = true;
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xmlText = xmlBufferDetach(out);
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@ -85,7 +98,12 @@ bool XMLWrapper::convertFromString(const char *text, xmlChar *&xmlText)
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return result;
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}
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xmlNodePtr XMLWrapper::getRootElement()
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xmlDocPtr XMLWrapper::getDocument() const
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{
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return mDocument;
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}
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xmlNodePtr XMLWrapper::getRootElement() const
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{
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if (mDocument) {
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return xmlDocGetRootElement(mDocument);
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@ -98,7 +116,7 @@ bool XMLWrapper::readXML(const char *xml)
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{
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cleanup();
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mDocument = xmlReadDoc((const xmlChar*) xml, "", NULL, XML_PARSE_NOERROR | XML_PARSE_NOWARNING/* | XML_PARSE_COMPACT | XML_PARSE_NOCDATA*/);
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mDocument = xmlReadDoc(BAD_CAST xml, "", NULL, XML_PARSE_NOERROR | XML_PARSE_NOWARNING | XML_PARSE_COMPACT | XML_PARSE_NOENT | XML_PARSE_NOCDATA);
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if (mDocument) {
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return true;
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}
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@ -114,7 +132,7 @@ bool XMLWrapper::getContent(xmlNodePtr node, std::string &content)
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return false;
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}
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xmlChar *xmlContent = xmlNodeListGetString(mDocument, node, 1);
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xmlChar *xmlContent = xmlNodeGetContent(node);
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if (!xmlContent) {
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return true;
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}
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@ -125,6 +143,23 @@ bool XMLWrapper::getContent(xmlNodePtr node, std::string &content)
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return result;
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}
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bool XMLWrapper::setContent(xmlNodePtr node, const char *content)
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{
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if (!node) {
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return false;
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}
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xmlChar *xmlContent;
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if (!convertFromString(content, xmlContent)) {
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return false;
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}
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xmlNodeSetContent(node, xmlContent);
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xmlFree(xmlContent);
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return true;
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}
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std::string XMLWrapper::nodeName(xmlNodePtr node)
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{
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std::string name;
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@ -150,7 +185,7 @@ std::string XMLWrapper::attrName(xmlAttrPtr attr)
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xmlNodePtr XMLWrapper::findNode(xmlNodePtr node, const char *name, bool children)
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{
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if (node->name) {
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if (xmlStrcasecmp(node->name, (xmlChar*) name) == 0) {
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if (xmlStrEqual(node->name, BAD_CAST name)) {
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return node;
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}
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}
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@ -218,7 +253,7 @@ std::string XMLWrapper::getAttr(xmlNodePtr node, const char *name)
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std::string value;
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xmlChar *xmlValue = xmlGetProp(node, (const xmlChar*) name);
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xmlChar *xmlValue = xmlGetProp(node, BAD_CAST name);
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if (xmlValue) {
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convertToString(xmlValue, value);
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xmlFree(xmlValue);
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@ -238,8 +273,17 @@ bool XMLWrapper::setAttr(xmlNodePtr node, const char *name, const char *value)
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return false;
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}
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xmlAttrPtr xmlAttr = xmlSetProp (node, (const xmlChar*) name, xmlValue);
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xmlAttrPtr xmlAttr = xmlSetProp (node, BAD_CAST name, xmlValue);
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xmlFree(xmlValue);
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return xmlAttr != NULL;
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}
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XPathWrapper *XMLWrapper::createXPath()
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{
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if (mDocument) {
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return new XPathWrapper(*this);
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}
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return NULL;
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}
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@ -25,16 +25,23 @@
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#include <string>
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#include <libxml/parser.h>
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class XPathWrapper;
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class XMLWrapper
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{
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public:
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XMLWrapper();
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~XMLWrapper();
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XMLWrapper &operator=(const XMLWrapper &xml);
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void cleanup();
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bool readXML(const char *xml);
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xmlDocPtr getDocument() const;
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xmlNodePtr getRootElement() const;
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std::string nodeName(xmlNodePtr node);
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std::string attrName(xmlAttrPtr attr);
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@ -42,19 +49,20 @@ public:
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bool getChildText(xmlNodePtr node, const char *childName, std::string &text);
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bool getContent(xmlNodePtr node, std::string &content);
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bool setContent(xmlNodePtr node, const char *content);
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std::string getAttr(xmlNodePtr node, xmlAttrPtr attr);
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std::string getAttr(xmlNodePtr node, const char *name);
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bool setAttr(xmlNodePtr node, const char *name, const char *value);
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xmlNodePtr getRootElement();
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XPathWrapper *createXPath();
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bool convertToString(const xmlChar *xmlText, std::string &text);
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bool convertFromString(const char *text, xmlChar *&xmlText);
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protected:
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xmlDocPtr mDocument;
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xmlCharEncodingHandlerPtr mCharEncodingHandler;
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bool convertToString(const xmlChar *xmlText, std::string &text);
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bool convertFromString(const char *text, xmlChar *&xmlText);
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};
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#endif
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102
plugins/FeedReader/util/XPathWrapper.cpp
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102
plugins/FeedReader/util/XPathWrapper.cpp
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@ -0,0 +1,102 @@
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/****************************************************************
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* RetroShare GUI is distributed under the following license:
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*
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* Copyright (C) 2012 by Thunder
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#include "XPathWrapper.h"
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#include "XMLWrapper.h"
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XPathWrapper::XPathWrapper(XMLWrapper &xmlWrapper) : mXMLWrapper(xmlWrapper)
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{
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mContext = NULL;
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mResult = NULL;
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}
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XPathWrapper::~XPathWrapper()
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{
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cleanup();
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}
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void XPathWrapper::cleanup()
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{
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if (mResult) {
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xmlXPathFreeObject(mResult);
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mResult = NULL;
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}
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if (mContext) {
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xmlXPathFreeContext(mContext);
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mContext = NULL;
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}
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}
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bool XPathWrapper::compile(const char *expression)
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{
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cleanup();
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xmlDocPtr document = mXMLWrapper.getDocument();
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if (!document) {
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return false;
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}
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mContext = xmlXPathNewContext(document);
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if (!mContext) {
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cleanup();
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return false;
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}
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xmlChar *xmlExpression = NULL;
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if (!mXMLWrapper.convertFromString(expression, xmlExpression)) {
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cleanup();
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return false;
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}
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mResult = xmlXPathEvalExpression(xmlExpression, mContext);
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xmlFree(xmlExpression);
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return true;
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}
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unsigned int XPathWrapper::count()
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{
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if (!mResult) {
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return 0;
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}
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if (xmlXPathNodeSetIsEmpty(mResult->nodesetval)) {
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return 0;
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}
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return mResult->nodesetval->nodeNr;
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}
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xmlNodePtr XPathWrapper::node(unsigned int index)
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{
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if (!mResult) {
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return NULL;
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}
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if (xmlXPathNodeSetIsEmpty(mResult->nodesetval)) {
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return NULL;
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}
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if (index >= (unsigned int) mResult->nodesetval->nodeNr) {
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return NULL;
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}
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return mResult->nodesetval->nodeTab[index];
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}
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51
plugins/FeedReader/util/XPathWrapper.h
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51
plugins/FeedReader/util/XPathWrapper.h
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@ -0,0 +1,51 @@
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/****************************************************************
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* RetroShare GUI is distributed under the following license:
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*
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* Copyright (C) 2012 by Thunder
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#ifndef XPATHWRAPPER
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#define XPATHWRAPPER
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#include <libxml/xpath.h>
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class XMLWrapper;
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class XPathWrapper
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{
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friend class XMLWrapper;
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public:
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~XPathWrapper();
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void cleanup();
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bool compile(const char *expression);
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unsigned int count();
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xmlNodePtr node(unsigned int index);
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protected:
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XPathWrapper(XMLWrapper &xmlWrapper);
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XMLWrapper &mXMLWrapper;
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xmlXPathContextPtr mContext;
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xmlXPathObjectPtr mResult;
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};
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#endif
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