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/* Copyright (C) 2005 J.F.Dockes
* 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 "autoconfig.h"
#include <iostream>
#include "cstr.h"
#include "mimehandler.h"
#include "log.h"
#include "readfile.h"
#include "transcode.h"
#include "mimeparse.h"
#include "myhtmlparse.h"
#include "indextext.h"
#include "mh_html.h"
#include "smallut.h"
#include "rclutil.h"
#include "md5ut.h"
#include "pathut.h"
#include "rclconfig.h"
using namespace std;
bool MimeHandlerHtml::set_document_file_impl(const string& mt, const string &fn)
{
LOGDEB0("MimeHandlerHtml::set_document_file_impl: " << fn << "\n");
// Check file size against limit. We use the same value as for
// text/plain. xdg-mime sometimes wrongly returns text/html for
// gigantic files (had a case with multi-GB xxx.enex evernote
// export files).
int maxmbs = -1;
m_config->getConfParam("textfilemaxmbs", &maxmbs);
auto totlen = path_filesize(fn);
if (totlen < 0) {
LOGSYSERR("MimeHandlerHtml::set_document_file", "stat", fn);
return false;
}
string otext;
if (maxmbs != -1 && totlen / (1024*1024) > maxmbs) {
LOGINF("MimeHandlerHtml: file too big (textfilemaxmbs=" << maxmbs <<
"), contents will not be indexed: " << fn << "\n");
} else {
string reason;
if (!file_to_string(fn, otext, &reason)) {
LOGERR("textHtmlToDoc: cant read: " << fn << ": " << reason << "\n");
return false;
}
}
m_filename = fn;
return set_document_string(mt, otext);
}
bool MimeHandlerHtml::set_document_string_impl(const string&, const string& htext)
{
m_html = htext;
m_havedoc = true;
if (!m_forPreview) {
// We want to compute the md5 now because we may modify m_html later
string md5, xmd5;
MD5String(htext, md5);
m_metaData[cstr_dj_keymd5] = MD5HexPrint(md5, xmd5);
}
return true;
}
bool MimeHandlerHtml::next_document()
{
if (m_havedoc == false)
return false;
m_havedoc = false;
// If set_doc(fn), take note of file name.
string fn = m_filename;
m_filename.erase();
string charset = m_dfltInputCharset;
LOGDEB("MHHtml::next_doc.: default supposed input charset: [" << charset << "]\n");
// Override default input charset if someone took care to set one:
const auto it = m_metaData.find(cstr_dj_keycharset);
if (it != m_metaData.end() && !it->second.empty()) {
charset = it->second;
LOGDEB("MHHtml: next_doc.: input charset from ext. metadata: [" << charset << "]\n");
}
// - We first try to convert from the supposed charset
// (which may depend of the current directory) to utf-8. If this
// fails, we keep the original text
// - During parsing, if we find a charset parameter, and it differs from
// what we started with, we abort and restart with the parameter value
// instead of the configuration one.
MyHtmlParser result;
for (int pass = 0; pass < 2; pass++) {
string transcoded;
LOGDEB("Html::mkDoc: pass " << pass << "\n");
MyHtmlParser p;
// Try transcoding. If it fails, use original text.
int ecnt;
if (!transcode(m_html, transcoded, charset, cstr_utf8, &ecnt)) {
LOGDEB("textHtmlToDoc: transcode failed from cs '" <<
charset << "' to UTF-8 for[" << (fn.empty()?"unknown":fn) << "]");
transcoded = m_html;
// We don't know the charset, at all
p.reset_charsets();
charset.clear();
} else {
if (ecnt) {
if (pass == 0) {
LOGDEB("textHtmlToDoc: init transcode had " << ecnt <<
" errors for ["<<(fn.empty()?"unknown":fn)<< "]\n");
} else {
LOGERR("textHtmlToDoc: final transcode had " << ecnt <<
" errors for ["<< (fn.empty()?"unknown":fn)<< "]\n");
}
}
// charset has the putative source charset, transcoded is now
// in utf-8
p.set_charsets(charset, cstr_utf8);
}
try {
p.parse_html(transcoded);
// No exception: ok? But throw true to use the same
// code path as if an exception had been thrown by parse_html
throw true;
break;
} catch (bool diag) {
result = p;
if (diag == true) {
// Parser throws true at end of text. ok
if (m_forPreview) {
// Save the html text
m_html = transcoded;
// In many cases, we need to change the charset decl,
// because the file was transcoded. It seems that just
// inserting one is enough (only the 1st one seems to
// be used by browsers/qtextedit).
string::size_type idx = m_html.find("<head>");
if (idx == string::npos)
idx = m_html.find("<HEAD>");
if (idx != string::npos)
m_html.replace(idx+6, 0,
"<meta http-equiv=\"content-type\" "
"content=\"text/html; charset=UTF-8\">");
}
break;
}
LOGDEB("textHtmlToDoc: charset [" << charset << "] doc charset [" <<
result.get_charset() << "]\n");
if (!result.get_charset().empty() &&
!samecharset(result.get_charset(), result.fromcharset)) {
LOGDEB("textHtmlToDoc: reparse for charsets\n");
// Set the origin charset as specified in document before
// transcoding again
charset = result.get_charset();
} else {
LOGERR("textHtmlToDoc:: error: non charset exception\n");
return false;
}
}
}
m_metaData[cstr_dj_keyorigcharset] = result.get_charset();
m_metaData[cstr_dj_keycontent] = result.dump;
m_metaData[cstr_dj_keycharset] = cstr_utf8;
// Avoid setting empty values which would crush ones possibly inherited
// from parent (if we're an attachment)
if (!result.dmtime.empty())
m_metaData[cstr_dj_keymd] = result.dmtime;
m_metaData[cstr_dj_keymt] = cstr_textplain;
for (const auto& entry : result.meta) {
if (!entry.second.empty()) {
m_metaData[entry.first] = entry.second;
}
}
return true;
}
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