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RetroShare/plugins/FeedReader/services/p3FeedReaderThread.cc
thunder2 504bbc00f1 Fixed memory leak in p3FeedReaderThread::processXPath. 
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@8460 b45a01b8-16f6-495d-af2f-9b41ad6348cc
2015-06-14 23:39:05 +00:00

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/****************************************************************
* RetroShare GUI is distributed under the following license:
*
* Copyright (C) 2012 by Thunder
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
****************************************************************/
#include "p3FeedReaderThread.h"
#include "rsFeedReaderItems.h"
#include "util/rsstring.h"
#include "util/CURLWrapper.h"
#include "util/XMLWrapper.h"
#include "util/HTMLWrapper.h"
#include "util/XPathWrapper.h"
#include <openssl/evp.h>
#include <unistd.h> // for usleep
enum FeedFormat { FORMAT_RSS, FORMAT_RDF, FORMAT_ATOM };
/*********
* #define FEEDREADER_DEBUG
*********/
p3FeedReaderThread::p3FeedReaderThread(p3FeedReader *feedReader, Type type, const std::string &feedId) :
RsTickingThread(), mFeedReader(feedReader), mType(type), mFeedId(feedId)
{
}
p3FeedReaderThread::~p3FeedReaderThread()
{
}
/***************************************************************************/
/****************************** Thread *************************************/
/***************************************************************************/
void p3FeedReaderThread::data_tick()
{
#ifdef WIN32
Sleep(1000);
#else
usleep(1000000);
#endif
/* every second */
switch (mType) {
case DOWNLOAD:
{
RsFeedReaderFeed feed;
if (mFeedReader->getFeedToDownload(feed, mFeedId)) {
std::string content;
std::string icon;
std::string errorString;
RsFeedReaderErrorState result = download(feed, content, icon, errorString);
if (result == RS_FEED_ERRORSTATE_OK) {
/* trim */
XMLWrapper::trimString(content);
mFeedReader->onDownloadSuccess(feed.feedId, content, icon);
} else {
mFeedReader->onDownloadError(feed.feedId, result, errorString);
}
}
}
break;
case PROCESS:
{
RsFeedReaderFeed feed;
if (mFeedReader->getFeedToProcess(feed, mFeedId)) {
std::list<RsFeedReaderMsg*> msgs;
std::string errorString;
std::list<RsFeedReaderMsg*>::iterator it;
RsFeedReaderErrorState result = process(feed, msgs, errorString);
if (result == RS_FEED_ERRORSTATE_OK) {
/* first, filter the messages */
mFeedReader->onProcessSuccess_filterMsg(feed.feedId, msgs);
if (isRunning()) {
/* second, process the descriptions */
for (it = msgs.begin(); it != msgs.end(); ) {
if (!isRunning()) {
break;
}
RsFeedReaderMsg *mi = *it;
result = processMsg(feed, mi, errorString);
if (result != RS_FEED_ERRORSTATE_OK) {
break;
}
if (feed.preview) {
/* add every message */
it = msgs.erase(it);
std::list<RsFeedReaderMsg*> msgSingle;
msgSingle.push_back(mi);
mFeedReader->onProcessSuccess_addMsgs(feed.feedId, msgSingle, true);
/* delete not accepted message */
std::list<RsFeedReaderMsg*>::iterator it1;
for (it1 = msgSingle.begin(); it1 != msgSingle.end(); ++it1) {
delete (*it1);
}
} else {
result = processTransformation(feed, mi, errorString);
if (result != RS_FEED_ERRORSTATE_OK) {
break;
}
++it;
}
}
if (isRunning()) {
if (result == RS_FEED_ERRORSTATE_OK) {
/* third, add messages */
mFeedReader->onProcessSuccess_addMsgs(feed.feedId, msgs, false);
} else {
mFeedReader->onProcessError(feed.feedId, result, errorString);
}
}
}
} else {
mFeedReader->onProcessError(feed.feedId, result, errorString);
}
/* delete not accepted messages */
for (it = msgs.begin(); it != msgs.end(); ++it) {
delete (*it);
}
msgs.clear();
}
}
break;
}
}
/***************************************************************************/
/****************************** Download ***********************************/
/***************************************************************************/
static bool isContentType(const std::string &contentType, const char *type)
{
return (strncasecmp(contentType.c_str(), type, strlen(type)) == 0);
}
static bool toBase64(const std::vector<unsigned char> &data, std::string &base64)
{
bool result = false;
/* Set up a base64 encoding BIO that writes to a memory BIO */
BIO *b64 = BIO_new(BIO_f_base64());
if (b64) {
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
BIO *bmem = BIO_new(BIO_s_mem());
if (bmem) {
BIO_set_flags(bmem, BIO_CLOSE); // probably redundant
b64 = BIO_push(b64, bmem);
/* Send the data */
BIO_write(b64, data.data(), data.size());
/* Collect the encoded data */
BIO_flush(b64);
char* temp;
int count = BIO_get_mem_data(bmem, &temp);
if (count && temp) {
base64.assign(temp, count);
result = true;
}
}
BIO_free_all(b64);
}
return result;
}
static std::string getBaseLink(std::string link)
{
size_t found = link.rfind('/');
if (found != std::string::npos) {
link.erase(found + 1);
}
return link;
}
static std::string calculateLink(const std::string &baseLink, const std::string &link)
{
if (link.substr(0, 7) == "http://") {
/* absolute link */
return link;
}
/* calculate link of base link */
std::string resultLink = baseLink;
/* link should begin with "http://" */
if (resultLink.substr(0, 7) != "http://") {
resultLink.insert(0, "http://");
}
if (link.empty()) {
/* no link */
return resultLink;
}
if (*link.begin() == '/') {
/* link begins with "/" */
size_t found = resultLink.find('/', 7);
if (found != std::string::npos) {
resultLink.erase(found);
}
} else {
/* check for "/" at the end */
std::string::reverse_iterator it = resultLink.rend ();
it--;
if (*it != '/') {
resultLink += "/";
}
}
resultLink += link;
return resultLink;
}
static bool getFavicon(CURLWrapper &CURL, const std::string &url, std::string &icon)
{
icon.clear();
bool result = false;
std::vector<unsigned char> vicon;
CURLcode code = CURL.downloadBinary(calculateLink(url, "/favicon.ico"), vicon);
if (code == CURLE_OK) {
if (CURL.responseCode() == 200) {
std::string contentType = CURL.contentType();
if (isContentType(contentType, "image/x-icon") ||
isContentType(contentType, "application/octet-stream") ||
isContentType(contentType, "text/plain")) {
if (!vicon.empty()) {
long todo; // check it
result = toBase64(vicon, icon);
}
}
}
}
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::download(const RsFeedReaderFeed &feed, std::string &content, std::string &icon, std::string &errorString)
{
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::download - feed " << feed.feedId << " (" << feed.name << ")" << std::endl;
#endif
content.clear();
errorString.clear();
RsFeedReaderErrorState result;
std::string proxy = getProxyForFeed(feed);
CURLWrapper CURL(proxy);
CURLcode code = CURL.downloadText(feed.url, content);
if (code == CURLE_OK) {
long responseCode = CURL.responseCode();
switch (responseCode) {
case 200:
{
std::string contentType = CURL.contentType();
if (isContentType(contentType, "text/xml") ||
isContentType(contentType, "text/html") ||
isContentType(contentType, "application/rss+xml") ||
isContentType(contentType, "application/xml") ||
isContentType(contentType, "application/xhtml+xml") ||
isContentType(contentType, "application/atom+xml")) {
/* ok */
result = RS_FEED_ERRORSTATE_OK;
} else {
result = RS_FEED_ERRORSTATE_DOWNLOAD_UNKNOWN_CONTENT_TYPE;
errorString = contentType;
}
}
break;
case 404:
result = RS_FEED_ERRORSTATE_DOWNLOAD_NOT_FOUND;
break;
default:
result = RS_FEED_ERRORSTATE_DOWNLOAD_UNKOWN_RESPONSE_CODE;
rs_sprintf(errorString, "%ld", responseCode);
}
getFavicon(CURL, feed.url, icon);
} else {
result = RS_FEED_ERRORSTATE_DOWNLOAD_ERROR;
errorString = curl_easy_strerror(code);
}
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::download - feed " << feed.feedId << " (" << feed.name << "), result " << result << ", error = " << errorString << std::endl;
#endif
return result;
}
/***************************************************************************/
/****************************** Process ************************************/
/***************************************************************************/
static xmlNodePtr getNextItem(FeedFormat feedFormat, xmlNodePtr channel, xmlNodePtr item)
{
if (!channel) {
return NULL;
}
if (!item) {
switch (feedFormat) {
case FORMAT_RSS:
case FORMAT_ATOM:
item = channel->children;
break;
case FORMAT_RDF:
item = channel->next;
break;
default:
return NULL;
}
} else {
item = item->next;
}
for (; item; item = item->next) {
if (item->type == XML_ELEMENT_NODE && xmlStrcasecmp(item->name, (feedFormat == FORMAT_ATOM) ? BAD_CAST"entry" : BAD_CAST"item") == 0) {
break;
}
}
return item;
}
static void splitString(std::string s, std::vector<std::string> &v, const char d)
{
v.clear();
std::string::size_type p;
while ((p = s.find_first_of(d)) != std::string::npos) {
v.push_back(s.substr(0, p));
s.erase(0, p + 1);
}
if (!s.empty()) {
v.push_back(s);
}
}
static unsigned int ymdhms_to_seconds(int year, int mon, int day, int hour, int minute, int second)
{
if (sizeof(time_t) == 4)
{
if ((time_t)-1 < 0)
{
if (year >= 2038)
{
year = 2038;
mon = 0;
day = 1;
hour = 0;
minute = 0;
second = 0;
}
}
else
{
if (year >= 2115)
{
year = 2115;
mon = 0;
day = 1;
hour = 0;
minute = 0;
second = 0;
}
}
}
unsigned int ret = (day - 32075) /* days */
+ 1461L * (year + 4800L + (mon - 14) / 12) / 4
+ 367 * (mon - 2 - (mon - 14) / 12 * 12) / 12
- 3 * ((year + 4900L + (mon - 14) / 12) / 100) / 4
- 2440588;
ret = 24*ret + hour; /* hours */
ret = 60*ret + minute; /* minutes */
ret = 60*ret + second; /* seconds */
return ret;
}
static const char haystack[37]="janfebmaraprmayjunjulaugsepoctnovdec";
// we follow the recommendation of rfc2822 to consider all
// obsolete time zones not listed here equivalent to "-0000"
static const struct {
const char tzName[4];
int tzOffset;
} known_zones[] = {
{ "UT", 0 },
{ "GMT", 0 },
{ "EST", -300 },
{ "EDT", -240 },
{ "CST", -360 },
{ "CDT", -300 },
{ "MST", -420 },
{ "MDT", -360 },
{ "PST", -480 },
{ "PDT", -420 },
{ { 0,0,0,0 }, 0 }
};
// copied from KRFCDate::parseDate
static time_t parseRFC822Date(const std::string &pubDate)
{
if (pubDate.empty())
return 0;
// This parse a date in the form:
// Wednesday, 09-Nov-99 23:12:40 GMT
// or
// Sat, 01-Jan-2000 08:00:00 GMT
// or
// Sat, 01 Jan 2000 08:00:00 GMT
// or
// 01 Jan 99 22:00 +0100 (exceptions in rfc822/rfc2822)
//
// We ignore the weekday
//
time_t result = 0;
int offset = 0;
char *newPosStr;
const char *dateString = pubDate.c_str();
int day = 0;
char monthStr[4];
int month = -1;
int year = 0;
int hour = 0;
int minute = 0;
int second = 0;
// Strip leading space
while(*dateString && isspace(*dateString))
dateString++;
// Strip weekday
while(*dateString && !isdigit(*dateString) && !isspace(*dateString))
dateString++;
// Strip trailing space
while(*dateString && isspace(*dateString))
dateString++;
if (!*dateString)
return result; // Invalid date
if (isalpha(*dateString))
{
// ' Nov 5 1994 18:15:30 GMT'
// Strip leading space
while(*dateString && isspace(*dateString))
dateString++;
for(int i=0; i < 3;i++)
{
if (!*dateString || (*dateString == '-') || isspace(*dateString))
return result; // Invalid date
monthStr[i] = tolower(*dateString++);
}
monthStr[3] = '\0';
newPosStr = (char*)strstr(haystack, monthStr);
if (!newPosStr)
return result; // Invalid date
month = (newPosStr-haystack)/3; // Jan=00, Feb=01, Mar=02, ..
if ((month < 0) || (month > 11))
return result; // Invalid date
while (*dateString && isalpha(*dateString))
dateString++; // Skip rest of month-name
}
// ' 09-Nov-99 23:12:40 GMT'
// ' 5 1994 18:15:30 GMT'
day = strtol(dateString, &newPosStr, 10);
dateString = newPosStr;
if ((day < 1) || (day > 31))
return result; // Invalid date;
if (!*dateString)
return result; // Invalid date
while(*dateString && (isspace(*dateString) || (*dateString == '-')))
dateString++;
if (month == -1)
{
for(int i=0; i < 3;i++)
{
if (!*dateString || (*dateString == '-') || isspace(*dateString))
return result; // Invalid date
monthStr[i] = tolower(*dateString++);
}
monthStr[3] = '\0';
newPosStr = (char*)strstr(haystack, monthStr);
if (!newPosStr)
return result; // Invalid date
month = (newPosStr-haystack)/3; // Jan=00, Feb=01, Mar=02, ..
if ((month < 0) || (month > 11))
return result; // Invalid date
while (*dateString && isalpha(*dateString))
dateString++; // Skip rest of month-name
}
// '-99 23:12:40 GMT'
while(*dateString && (isspace(*dateString) || (*dateString == '-')))
dateString++;
if (!*dateString || !isdigit(*dateString))
return result; // Invalid date
// '99 23:12:40 GMT'
year = strtol(dateString, &newPosStr, 10);
dateString = newPosStr;
// Y2K: Solve 2 digit years
if ((year >= 0) && (year < 50))
year += 2000;
if ((year >= 50) && (year < 100))
year += 1900; // Y2K
if ((year < 1900) || (year > 2500))
return result; // Invalid date
// Don't fail if the time is missing.
if (*dateString)
{
// ' 23:12:40 GMT'
if (!isspace(*dateString++))
return result; // Invalid date
hour = strtol(dateString, &newPosStr, 10);
dateString = newPosStr;
if ((hour < 0) || (hour > 23))
return result; // Invalid date
if (!*dateString)
return result; // Invalid date
// ':12:40 GMT'
if (*dateString++ != ':')
return result; // Invalid date
minute = strtol(dateString, &newPosStr, 10);
dateString = newPosStr;
if ((minute < 0) || (minute > 59))
return result; // Invalid date
if (!*dateString)
return result; // Invalid date
// ':40 GMT'
if (*dateString != ':' && !isspace(*dateString))
return result; // Invalid date
// seconds are optional in rfc822 + rfc2822
if (*dateString ==':') {
dateString++;
second = strtol(dateString, &newPosStr, 10);
dateString = newPosStr;
if ((second < 0) || (second > 59))
return result; // Invalid date
} else {
dateString++;
}
while(*dateString && isspace(*dateString))
dateString++;
}
// don't fail if the time zone is missing, some
// broken mail-/news-clients omit the time zone
if (*dateString) {
if ((strncasecmp(dateString, "gmt", 3) == 0) ||
(strncasecmp(dateString, "utc", 3) == 0))
{
dateString += 3;
while(*dateString && isspace(*dateString))
dateString++;
}
if ((*dateString == '+') || (*dateString == '-')) {
offset = strtol(dateString, &newPosStr, 10);
if (abs(offset) < 30)
{
dateString = newPosStr;
offset = offset * 100;
if (*dateString && *(dateString+1))
{
dateString++;
int minutes = strtol(dateString, &newPosStr, 10);
if (offset > 0)
offset += minutes;
else
offset -= minutes;
}
}
if ((offset < -9959) || (offset > 9959))
return result; // Invalid date
int sgn = (offset < 0)? -1:1;
offset = abs(offset);
offset = ((offset / 100)*60 + (offset % 100))*sgn;
} else {
for (int i=0; known_zones[i].tzName != 0; i++) {
if (0 == strncasecmp(dateString, known_zones[i].tzName, strlen(known_zones[i].tzName))) {
offset = known_zones[i].tzOffset;
break;
}
}
}
}
result = ymdhms_to_seconds(year, month+1, day, hour, minute, second);
// avoid negative time values
if ((offset > 0) && (offset > result))
offset = 0;
result -= offset*60;
// If epoch 0 return epoch +1 which is Thu, 01-Jan-70 00:00:01 GMT
// This is so that parse error and valid epoch 0 return values won't
// be the same for sensitive applications...
if (result < 1) result = 1;
return result;
}
// copied and converted to std::string from KRFCDate::parseDateISO8601
static time_t parseISO8601Date(const std::string &pubDate)
{
if (pubDate.empty()) {
return 0;
}
// These dates look like this:
// YYYY-MM-DDTHH:MM:SS
// But they may also have 0, 1 or 2 suffixes.
// Suffix 1: .secfrac (fraction of second)
// Suffix 2: Either 'Z' or +zone or -zone, where zone is HHMM
unsigned int year = 0;
unsigned int month = 0;
unsigned int mday = 0;
unsigned int hour = 0;
unsigned int min = 0;
unsigned int sec = 0;
int offset = 0;
std::string input = pubDate;
// First find the 'T' separator, if any.
int tPos = input.find('T');
// If there is no time, no month or no day specified, fill those missing
// fields so that 'input' matches YYYY-MM-DDTHH:MM:SS
if (-1 == tPos) {
int dashes = 0;
std::string::iterator it;
for (it = input.begin(); it != input.end(); ++it) {
if (*it == '-') {
++dashes;
}
}
if (0 == dashes) {
input += "-01-01";
} else if (1 == dashes) {
input += "-01";
}
tPos = input.length();
input += "T12:00:00";
}
// Now parse the date part.
std::string dateString = input.substr(0, tPos);//.stripWhiteSpace();
std::string timeString = input.substr(tPos + 1);//.stripWhiteSpace();
std::vector<std::string> l;
splitString(dateString, l, '-');
if (l.size() < 3)
return 0;
sscanf(l[0].c_str(), "%u", &year);
sscanf(l[1].c_str(), "%u", &month);
sscanf(l[2].c_str(), "%u", &mday);
// Z suffix means UTC.
if ('Z' == timeString[timeString.length() - 1]) {
timeString.erase(timeString.length() - 1, 1);
}
// +zone or -zone suffix (offset from UTC).
int plusPos = timeString.find_last_of('+');
if (-1 != plusPos) {
std::string offsetString = timeString.substr(plusPos + 1);
unsigned int offsetHour;
unsigned int offsetMinute;
sscanf(offsetString.substr(0, 1).c_str(), "%u", &offsetHour);
sscanf(offsetString.substr(offsetString.length() - 2).c_str(), "%u", &offsetMinute);
offset = offsetHour * 60 + offsetMinute;
timeString = timeString.substr(0, plusPos);
} else {
int minusPos = timeString.find_last_of('-');
if (-1 != minusPos) {
std::string offsetString = timeString.substr(minusPos + 1);
unsigned int offsetHour;
unsigned int offsetMinute;
sscanf(offsetString.substr(0, 1).c_str(), "%u", &offsetHour);
sscanf(offsetString.substr(offsetString.length() - 2).c_str(), "%u", &offsetMinute);
timeString = timeString.substr(0, minusPos);
}
}
// secfrac suffix.
int dotPos = timeString.find_last_of('.');
if (-1 != dotPos) {
timeString = timeString.substr(0, dotPos);
}
// Now parse the time part.
splitString(timeString, l, ':');
if (l.size() < 3)
return 0;
sscanf(l[0].c_str(), "%u", &hour);
sscanf(l[1].c_str(), "%u", &min);
sscanf(l[2].c_str(), "%u", &sec);
time_t result = ymdhms_to_seconds(year, month, mday, hour, min, sec);
// avoid negative time values
if ((offset > 0) && (offset > result))
offset = 0;
result -= offset*60;
// If epoch 0 return epoch +1 which is Thu, 01-Jan-70 00:00:01 GMT
// This is so that parse error and valid epoch 0 return values won't
// be the same for sensitive applications...
if (result < 1) result = 1;
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::process(const RsFeedReaderFeed &feed, std::list<RsFeedReaderMsg*> &entries, std::string &errorString)
{
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::process - feed " << feed.feedId << " (" << feed.name << ")" << std::endl;
#endif
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
XMLWrapper xml;
if (xml.readXML(feed.content.c_str())) {
xmlNodePtr root = xml.getRootElement();
if (root) {
FeedFormat feedFormat;
if (xmlStrcasecmp(root->name, BAD_CAST"rss") == 0) {
feedFormat = FORMAT_RSS;
} else if (xmlStrcasecmp (root->name, BAD_CAST"rdf") == 0) {
feedFormat = FORMAT_RDF;
} else if (xmlStrcasecmp (root->name, BAD_CAST"feed") == 0) {
feedFormat = FORMAT_ATOM;
} else {
result = RS_FEED_ERRORSTATE_PROCESS_UNKNOWN_FORMAT;
errorString = "Only RSS, RDF or ATOM supported";
}
if (result == RS_FEED_ERRORSTATE_OK) {
xmlNodePtr channel = NULL;
switch (feedFormat) {
case FORMAT_RSS:
case FORMAT_RDF:
channel = xml.findNode(root->children, "channel");
break;
case FORMAT_ATOM:
channel = root;
break;
}
if (channel) {
/* import header info */
if (feed.flag & RS_FEED_FLAG_INFO_FROM_FEED) {
std::string title;
if (xml.getChildText(channel, "title", title) && !title.empty()) {
std::string::size_type p;
while ((p = title.find_first_of("\r\n")) != std::string::npos) {
title.erase(p, 1);
}
std::string description;
xml.getChildText(channel, (feedFormat == FORMAT_ATOM) ? "subtitle" : "description", description);
mFeedReader->setFeedInfo(feed.feedId, title, description);
}
}
/* process items */
xmlNodePtr node;
for (node = NULL; (node = getNextItem(feedFormat, channel, node)) != NULL; ) {
if (!isRunning()) {
break;
}
std::string title;
if (!xml.getChildText(node, "title", title) || title.empty()) {
continue;
}
/* remove newlines */
std::string::size_type p;
while ((p = title.find_first_of("\r\n")) != std::string::npos) {
title.erase(p, 1);
}
RsFeedReaderMsg *item = new RsFeedReaderMsg();
item->msgId.clear(); // is calculated later
item->feedId = feed.feedId;
item->title = title;
/* try feedburner:origLink */
if (!xml.getChildText(node, "origLink", item->link) || item->link.empty()) {
xml.getChildText(node, "link", item->link);
if (item->link.empty()) {
xmlNodePtr linkNode = xml.findNode(node, "link", true);
item->link = xml.getAttr(linkNode, "href");
}
}
// remove sid=
std::string linkUpper;
stringToUpperCase(item->link, linkUpper);
std::string::size_type sidStart = linkUpper.find("SID=");
if (sidStart != std::string::npos) {
std::string::size_type sidEnd1 = linkUpper.find(";", sidStart);
std::string::size_type sidEnd2 = linkUpper.find("#", sidStart);
if (sidEnd1 == std::string::npos) {
sidEnd1 = linkUpper.size();
}
if (sidEnd2 == std::string::npos) {
sidEnd2 = linkUpper.size();
}
if (sidStart > 0 && linkUpper[sidStart - 1] == '&') {
sidStart--;
}
std::string::size_type sidEnd = std::min(sidEnd1, sidEnd2);
item->link.erase(sidStart, sidEnd - sidStart);
}
if (feedFormat == FORMAT_ATOM) {
/* <author><name>...</name></author> */
xmlNodePtr author = xml.findNode(node->children, "author", false);
if (author) {
xml.getChildText(node, "name", item->author);
}
} else {
if (!xml.getChildText(node, "author", item->author)) {
xml.getChildText(node, "creator", item->author);
}
}
switch (feedFormat) {
case FORMAT_RSS:
case FORMAT_RDF:
/* try content:encoded */
if (!xml.getChildText(node, "encoded", item->description)) {
/* use description */
xml.getChildText(node, "description", item->description);
}
break;
case FORMAT_ATOM:
/* try content */
if (!xml.getChildText(node, "content", item->description)) {
/* use summary */
xml.getChildText(node, "summary", item->description);
}
break;
}
std::string pubDate;
if (xml.getChildText(node, "pubDate", pubDate)) {
item->pubDate = parseRFC822Date(pubDate);
}
if (xml.getChildText(node, "date", pubDate)) {
item->pubDate = parseISO8601Date (pubDate);
}
if (xml.getChildText(node, "updated", pubDate)) {
// atom
item->pubDate = parseISO8601Date (pubDate);
}
if (item->pubDate == 0) {
/* use current time */
item->pubDate = time(NULL);
}
entries.push_back(item);
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_UNKNOWN_FORMAT;
errorString = "Channel not found";
}
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_UNKNOWN_FORMAT;
errorString = "Can't read document";
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
errorString = xml.lastError();
}
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::process - feed " << feed.feedId << " (" << feed.name << "), result " << result << ", error = " << errorString << std::endl;
if (result == RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR) {
std::cerr << " Error: " << errorString << std::endl;
}
#endif
return result;
}
std::string p3FeedReaderThread::getProxyForFeed(const RsFeedReaderFeed &feed)
{
std::string proxy;
if (feed.flag & RS_FEED_FLAG_STANDARD_PROXY) {
std::string standardProxyAddress;
uint16_t standardProxyPort;
if (mFeedReader->getStandardProxy(standardProxyAddress, standardProxyPort)) {
rs_sprintf(proxy, "%s:%u", standardProxyAddress.c_str(), standardProxyPort);
}
} else {
if (!feed.proxyAddress.empty() && feed.proxyPort) {
rs_sprintf(proxy, "%s:%u", feed.proxyAddress.c_str(), feed.proxyPort);
}
}
return proxy;
}
RsFeedReaderErrorState p3FeedReaderThread::processMsg(const RsFeedReaderFeed &feed, RsFeedReaderMsg *msg, std::string &errorString)
{
long todo_fill_errorString;
if (!msg) {
return RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
}
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
std::string proxy = getProxyForFeed(feed);
std::string url;
if (feed.flag & RS_FEED_FLAG_SAVE_COMPLETE_PAGE) {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") download page " << msg->link << std::endl;
#endif
std::string content;
CURLWrapper CURL(proxy);
CURLcode code = CURL.downloadText(msg->link, content);
if (code == CURLE_OK) {
long responseCode = CURL.responseCode();
switch (responseCode) {
case 200:
{
std::string contentType = CURL.contentType();
if (isContentType(CURL.contentType(), "text/html")) {
/* ok */
msg->description = content;
} else {
result = RS_FEED_ERRORSTATE_DOWNLOAD_UNKNOWN_CONTENT_TYPE;
errorString = contentType;
}
}
break;
case 404:
result = RS_FEED_ERRORSTATE_DOWNLOAD_NOT_FOUND;
break;
default:
result = RS_FEED_ERRORSTATE_DOWNLOAD_UNKOWN_RESPONSE_CODE;
rs_sprintf(errorString, "%ld", responseCode);
}
} else {
result = RS_FEED_ERRORSTATE_DOWNLOAD_ERROR;
errorString = curl_easy_strerror(code);
}
if (result != RS_FEED_ERRORSTATE_OK) {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") cannot download page, CURLCode = " << code << ", error = " << errorString << std::endl;
#endif
return result;
}
/* get effective url (moved location) */
std::string effectiveUrl = CURL.effectiveUrl();
url = getBaseLink(effectiveUrl.empty() ? msg->link : effectiveUrl);
}
/* check if string contains xml chars (very simple test) */
if (msg->description.find('<') == std::string::npos && feed.transformationType == RS_FEED_TRANSFORMATION_TYPE_NONE) {
return result;
}
if (isRunning()) {
/* process description */
long todo; // encoding
HTMLWrapper html;
if (html.readHTML(msg->description.c_str(), url.c_str())) {
xmlNodePtr root = html.getRootElement();
if (root) {
std::list<xmlNodePtr> nodesToDelete;
/* process all children */
std::list<xmlNodePtr> nodes;
nodes.push_back(root);
while (!nodes.empty()) {
if (!isRunning()) {
break;
}
xmlNodePtr node = nodes.front();
nodes.pop_front();
switch (node->type) {
case XML_ELEMENT_NODE:
if (xmlStrcasecmp(node->name, BAD_CAST"img") == 0) {
/* process images */
if ((feed.flag & RS_FEED_FLAG_EMBED_IMAGES) == 0) {
/* remove image */
xmlUnlinkNode(node);
nodesToDelete.push_back(node);
continue;
}
} else if (xmlStrcasecmp(node->name, BAD_CAST"script") == 0) {
/* remove script */
xmlUnlinkNode(node);
nodesToDelete.push_back(node);
continue;
}
xmlNodePtr child;
for (child = node->children; child; child = child->next) {
nodes.push_back(child);
}
break;
case XML_TEXT_NODE:
{
/* check for only space */
std::string content;
if (html.getContent(node, content, false)) {
std::string newContent = content;
/* trim */
XMLWrapper::trimString(newContent);
if (newContent.empty()) {
xmlUnlinkNode(node);
nodesToDelete.push_back(node);
} else {
if (content != newContent) {
html.setContent(node, newContent.c_str());
}
}
}
}
break;
case XML_COMMENT_NODE:
// xmlUnlinkNode(node);
// nodesToDelete.push_back(node);
break;
case XML_ATTRIBUTE_NODE:
case XML_CDATA_SECTION_NODE:
case XML_ENTITY_REF_NODE:
case XML_ENTITY_NODE:
case XML_PI_NODE:
case XML_DOCUMENT_NODE:
case XML_DOCUMENT_TYPE_NODE:
case XML_DOCUMENT_FRAG_NODE:
case XML_NOTATION_NODE:
case XML_HTML_DOCUMENT_NODE:
case XML_DTD_NODE:
case XML_ELEMENT_DECL:
case XML_ATTRIBUTE_DECL:
case XML_ENTITY_DECL:
case XML_NAMESPACE_DECL:
case XML_XINCLUDE_START:
case XML_XINCLUDE_END:
#ifdef LIBXML_DOCB_ENABLED
case XML_DOCB_DOCUMENT_NODE:
#endif
break;
}
}
std::list<xmlNodePtr>::iterator nodeIt;
for (nodeIt = nodesToDelete.begin(); nodeIt != nodesToDelete.end(); ++nodeIt) {
xmlFreeNode(*nodeIt);
}
nodesToDelete.clear();
if (isRunning() && result == RS_FEED_ERRORSTATE_OK) {
unsigned int xpathCount;
unsigned int xpathIndex;
XPathWrapper *xpath = html.createXPath();
if (xpath) {
/* process images */
if (xpath->compile("//img")) {
xpathCount = xpath->count();
for (xpathIndex = 0; xpathIndex < xpathCount; ++xpathIndex) {
if (!isRunning()) {
break;
}
xmlNodePtr node = xpath->node(xpathIndex);
if (node->type == XML_ELEMENT_NODE) {
bool removeImage = true;
if (feed.flag & RS_FEED_FLAG_EMBED_IMAGES) {
/* embed image */
std::string src = html.getAttr(node, "src");
if (!src.empty()) {
/* download image */
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") download image " << src << std::endl;
#endif
std::vector<unsigned char> data;
CURLWrapper CURL(proxy);
CURLcode code = CURL.downloadBinary(calculateLink(url, src), data);
if (code == CURLE_OK && CURL.responseCode() == 200) {
std::string contentType = CURL.contentType();
if (isContentType(contentType, "image/")) {
std::string base64;
if (toBase64(data, base64)) {
std::string imageBase64;
rs_sprintf(imageBase64, "data:%s;base64,%s", contentType.c_str(), base64.c_str());
if (html.setAttr(node, "src", imageBase64.c_str())) {
removeImage = false;
}
}
}
}
}
}
if (removeImage) {
/* remove image */
xmlUnlinkNode(node);
nodesToDelete.push_back(node);
continue;
}
}
}
} else {
// unable to compile xpath expression
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_INTERNAL_ERROR;
}
delete(xpath);
xpath = NULL;
} else {
// unable to create xpath object
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_INTERNAL_ERROR;
std::cerr << "p3FeedReaderThread::process - feed " << feed.feedId << " (" << feed.name << "), unable to create xpath object" << std::endl;
}
}
for (nodeIt = nodesToDelete.begin(); nodeIt != nodesToDelete.end(); ++nodeIt) {
xmlFreeNode(*nodeIt);
}
nodesToDelete.clear();
if (result == RS_FEED_ERRORSTATE_OK) {
if (isRunning()) {
if (!html.saveHTML(msg->description)) {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") cannot dump html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
}
}
}
} else {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") no root element" << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
} else {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processHTML - feed " << feed.feedId << " (" << feed.name << ") cannot read html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
}
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::processTransformation(const RsFeedReaderFeed &feed, RsFeedReaderMsg *msg, std::string &errorString)
{
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
switch (feed.transformationType) {
case RS_FEED_TRANSFORMATION_TYPE_NONE:
break;
case RS_FEED_TRANSFORMATION_TYPE_XPATH:
msg->descriptionTransformed = msg->description;
result = processXPath(feed.xpathsToUse.ids, feed.xpathsToRemove.ids, msg->descriptionTransformed, errorString);
break;
case RS_FEED_TRANSFORMATION_TYPE_XSLT:
msg->descriptionTransformed = msg->description;
result = processXslt(feed.xslt, msg->descriptionTransformed, errorString);
break;
}
if (msg->descriptionTransformed == msg->description) {
msg->descriptionTransformed.clear();
}
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::processXPath(const std::list<std::string> &xpathsToUse, const std::list<std::string> &xpathsToRemove, HTMLWrapper &html, std::string &errorString)
{
long todo_fill_errorString;
if (xpathsToUse.empty() && xpathsToRemove.empty()) {
return RS_FEED_ERRORSTATE_OK;
}
XPathWrapper *xpath = html.createXPath();
if (xpath == NULL) {
// unable to create xpath object
std::cerr << "p3FeedReaderThread::processXPath - unable to create xpath object" << std::endl;
return RS_FEED_ERRORSTATE_PROCESS_XPATH_INTERNAL_ERROR;
}
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
unsigned int xpathCount;
unsigned int xpathIndex;
std::list<std::string>::const_iterator xpathIt;
if (!xpathsToUse.empty()) {
HTMLWrapper htmlNew;
if (htmlNew.createHTML()) {
xmlNodePtr body = htmlNew.getBody();
if (body) {
/* process use list */
for (xpathIt = xpathsToUse.begin(); xpathIt != xpathsToUse.end(); ++xpathIt) {
if (xpath->compile(xpathIt->c_str())) {
xpathCount = xpath->count();
if (xpathCount) {
for (xpathIndex = 0; xpathIndex < xpathCount; ++xpathIndex) {
xmlNodePtr node = xpath->node(xpathIndex);
xmlUnlinkNode(node);
xmlAddChild(body, node);
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_NO_RESULT;
errorString = *xpathIt;
break;
}
} else {
// unable to process xpath expression
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXPath - unable to process xpath expression" << std::endl;
#endif
errorString = *xpathIt;
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_WRONG_EXPRESSION;
}
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
if (result == RS_FEED_ERRORSTATE_OK) {
html = htmlNew;
}
}
if (result == RS_FEED_ERRORSTATE_OK) {
std::list<xmlNodePtr> nodesToDelete;
/* process remove list */
for (xpathIt = xpathsToRemove.begin(); xpathIt != xpathsToRemove.end(); ++xpathIt) {
if (xpath->compile(xpathIt->c_str())) {
xpathCount = xpath->count();
if (xpathCount) {
for (xpathIndex = 0; xpathIndex < xpathCount; ++xpathIndex) {
xmlNodePtr node = xpath->node(xpathIndex);
xmlUnlinkNode(node);
nodesToDelete.push_back(node);
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_NO_RESULT;
errorString = *xpathIt;
break;
}
} else {
// unable to process xpath expression
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXPath - unable to process xpath expression" << std::endl;
#endif
errorString = *xpathIt;
result = RS_FEED_ERRORSTATE_PROCESS_XPATH_WRONG_EXPRESSION;
break;
}
}
std::list<xmlNodePtr>::iterator nodeIt;
for (nodeIt = nodesToDelete.begin(); nodeIt != nodesToDelete.end(); ++nodeIt) {
xmlFreeNode(*nodeIt);
}
nodesToDelete.clear();
}
delete(xpath);
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::processXPath(const std::list<std::string> &xpathsToUse, const std::list<std::string> &xpathsToRemove, std::string &description, std::string &errorString)
{
if (xpathsToUse.empty() && xpathsToRemove.empty()) {
return RS_FEED_ERRORSTATE_OK;
}
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
/* process description */
long todo; // encoding
HTMLWrapper html;
if (html.readHTML(description.c_str(), "")) {
xmlNodePtr root = html.getRootElement();
if (root) {
result = processXPath(xpathsToUse, xpathsToRemove, html, errorString);
if (result == RS_FEED_ERRORSTATE_OK) {
if (!html.saveHTML(description)) {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXPath - cannot dump html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
}
}
} else {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXPath - no root element" << std::endl;
#endif
errorString = "No root element found";
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
} else {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXPath - cannot read html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::processXslt(const std::string &xslt, HTMLWrapper &html, std::string &errorString)
{
XMLWrapper style;
if (!style.readXML(xslt.c_str())) {
errorString = style.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - error loading style" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
return RS_FEED_ERRORSTATE_PROCESS_XSLT_FORMAT_ERROR;
}
XMLWrapper xmlResult;
if (!html.transform(style, xmlResult)) {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - error transform" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
return RS_FEED_ERRORSTATE_PROCESS_XSLT_TRANSFORM_ERROR;
}
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
xmlNodePtr root = xmlResult.getRootElement();
if (root) {
if (xmlResult.nodeName(root) == "html") {
if (root->children && xmlResult.nodeName(root->children) == "body") {
root = root->children->children;
}
}
HTMLWrapper htmlNew;
if (htmlNew.createHTML()) {
xmlNodePtr body = htmlNew.getBody();
if (body) {
/* copy result nodes */
xmlNodePtr node;
for (node = root; node; node = node->next) {
xmlNodePtr newNode = xmlCopyNode(node, 1);
if (newNode) {
if (!xmlAddChild(body, newNode)) {
xmlFreeNode(newNode);
break;
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - node copy error" << std::endl;
#endif
break;
}
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
} else {
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
if (result == RS_FEED_ERRORSTATE_OK) {
html = htmlNew;
}
} else {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - no result" << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_XSLT_NO_RESULT;
}
return result;
}
RsFeedReaderErrorState p3FeedReaderThread::processXslt(const std::string &xslt, std::string &description, std::string &errorString)
{
if (xslt.empty()) {
return RS_FEED_ERRORSTATE_OK;
}
RsFeedReaderErrorState result = RS_FEED_ERRORSTATE_OK;
/* process description */
long todo; // encoding
HTMLWrapper html;
if (html.readHTML(description.c_str(), "")) {
xmlNodePtr root = html.getRootElement();
if (root) {
result = processXslt(xslt, html, errorString);
if (result == RS_FEED_ERRORSTATE_OK) {
if (!html.saveHTML(description)) {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - cannot dump html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_INTERNAL_ERROR;
}
}
} else {
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - no root element" << std::endl;
#endif
errorString = "No root element found";
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
} else {
errorString = html.lastError();
#ifdef FEEDREADER_DEBUG
std::cerr << "p3FeedReaderThread::processXslt - cannot read html" << std::endl;
std::cerr << " Error: " << errorString << std::endl;
#endif
result = RS_FEED_ERRORSTATE_PROCESS_HTML_ERROR;
}
return result;
}
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