Parent: [38e095] (diff)

Child: [a5af2b] (diff)

Download this file

mh_text.cpp    179 lines (156 with data), 5.2 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "autoconfig.h"
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
#include <iostream>
#include <string>
#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */
#include "cstr.h"
#include "mh_text.h"
#include "csguess.h"
#include "debuglog.h"
#include "readfile.h"
#include "md5.h"
#include "rclconfig.h"
const int MB = 1024*1024;
const int KB = 1024;
// Process a plain text file
bool MimeHandlerText::set_document_file(const string &fn)
{
LOGDEB(("MimeHandlerText::set_document_file: [%s]\n", fn.c_str()));
RecollFilter::set_document_file(fn);
m_fn = fn;
// file size for oversize check
struct stat st;
if (stat(m_fn.c_str(), &st) < 0) {
LOGERR(("MimeHandlerText::set_document_file: stat(%s) errno %d\n",
m_fn.c_str(), errno));
return false;
}
// Max file size parameter: texts over this size are not indexed
int maxmbs = 20;
m_config->getConfParam("textfilemaxmbs", &maxmbs);
if (maxmbs == -1 || st.st_size / MB <= maxmbs) {
// Text file page size: if set, we split text files into
// multiple documents
int ps = 1000;
m_config->getConfParam("textfilepagekbs", &ps);
if (ps != -1) {
ps *= KB;
m_paging = true;
}
m_pagesz = size_t(ps);
string reason;
LOGDEB(("calling file_to_string\n"));
// file_to_string() takes pagesz == size_t(-1) to mean read all.
if (!file_to_string(fn, m_text, 0, m_pagesz, &reason)) {
LOGERR(("MimeHandlerText: can't read file: %s\n", reason.c_str()));
return false;
}
LOGDEB(("file_to_string OK\n"));
m_offs = m_text.length();
}
string md5, xmd5;
MD5String(m_text, md5);
m_metaData["md5"] = MD5HexPrint(md5, xmd5);
m_havedoc = true;
return true;
}
bool MimeHandlerText::set_document_string(const string& otext)
{
m_text = otext;
string md5, xmd5;
MD5String(m_text, md5);
m_metaData["md5"] = MD5HexPrint(md5, xmd5);
m_havedoc = true;
return true;
}
bool MimeHandlerText::skip_to_document(const string& ipath)
{
long long t;
if (sscanf(ipath.c_str(), "%lld", &t) != 1) {
LOGERR(("MimeHandlerText::skip_to_document: bad ipath offs [%s]\n",
ipath.c_str()));
return false;
}
m_offs = (off_t)t;
readnext();
return true;
}
bool MimeHandlerText::next_document()
{
LOGDEB(("MimeHandlerText::next_document: m_havedoc %d\n", int(m_havedoc)));
if (m_havedoc == false)
return false;
// We transcode even if defcharset is supposedly already utf-8:
// this validates the encoding.
m_metaData[cstr_origcharset] = m_dfltInputCharset;
m_metaData[cstr_mimetype] = cstr_textplain;
size_t srclen = m_text.length();
m_metaData[cstr_content].swap(m_text);
// txtdcode() truncates the text if transcoding fails
(void)txtdcode("mh_text");
// If the text length is 0 (the file is empty or oversize), or we are
// not paging, we're done
if (srclen == 0 || !m_paging) {
m_havedoc = false;
return true;
} else {
// Paging: set ipath then read next chunk.
// Don't set ipath for the first chunk to avoid having 2
// records for small files (one for the file, one for the
// first chunk). This is a hack. The right thing to do would
// be to use a different mtype for files over the page size,
// and keep text/plain only for smaller files.
char buf[30];
sprintf(buf, "%lld", (long long)(m_offs - srclen));
if (m_offs - srclen != 0)
m_metaData[cstr_ipath] = buf;
readnext();
return true;
}
}
bool MimeHandlerText::readnext()
{
string reason;
m_text.clear();
if (!file_to_string(m_fn, m_text, m_offs, m_pagesz, &reason)) {
LOGERR(("MimeHandlerText: can't read file: %s\n", reason.c_str()));
m_havedoc = false;
return false;
}
if (m_text.length() == 0) {
// EOF
m_havedoc = false;
return true;
}
// If possible try to adjust the chunk to end right after a line
// Don't do this for the last chunk
if (m_text.length() == m_pagesz) {
string::size_type pos = m_text.find_last_of("\n\r");
if (pos != string::npos && pos != 0) {
m_text.erase(pos);
}
}
m_offs += m_text.length();
return true;
}