Parent: [2fc294] (diff)

Child: [a7728c] (diff)

Download this file

mh_exec.cpp    190 lines (169 with data), 5.9 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
179
180
181
182
183
184
185
186
187
188
189
/* 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 "cstr.h"
#include "execmd.h"
#include "mh_exec.h"
#include "mh_html.h"
#include "debuglog.h"
#include "cancelcheck.h"
#include "smallut.h"
#include "md5.h"
#include "rclconfig.h"
#include <sys/types.h>
#include <sys/wait.h>
#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */
// This is called periodically by ExeCmd when it is waiting for data,
// or when it does receive some. We may choose to interrupt the
// command.
class MEAdv : public ExecCmdAdvise {
public:
MEAdv(int maxsecs) : m_filtermaxseconds(maxsecs) {m_start = time(0L);}
void newData(int n) {
LOGDEB1(("MHExec:newData(%d)\n", n));
if (m_filtermaxseconds > 0 &&
time(0L) - m_start > m_filtermaxseconds) {
LOGERR(("MimeHandlerExec: filter timeout (%d S)\n",
m_filtermaxseconds));
CancelCheck::instance().setCancel();
}
// If a cancel request was set by the signal handler (or by us
// just above), this will raise an exception. Another approach
// would be to call ExeCmd::setCancel().
CancelCheck::instance().checkCancel();
}
time_t m_start;
int m_filtermaxseconds;
};
bool MimeHandlerExec::skip_to_document(const string& ipath)
{
LOGDEB(("MimeHandlerExec:skip_to_document: [%s]\n", ipath.c_str()));
m_ipath = ipath;
return true;
}
// Execute an external program to translate a file from its native
// format to text or html.
bool MimeHandlerExec::next_document()
{
if (m_havedoc == false)
return false;
m_havedoc = false;
if (missingHelper) {
LOGDEB(("MimeHandlerExec::next_document(): helper known missing\n"));
return false;
}
int filtermaxseconds = 900;
m_config->getConfParam("filtermaxseconds", &filtermaxseconds);
if (params.empty()) {
// Hu ho
LOGERR(("MimeHandlerExec::mkDoc: empty params\n"));
m_reason = "RECFILTERROR BADCONFIG";
return false;
}
// Command name
string cmd = params.front();
// Build parameter vector: delete cmd name and add the file name
vector<string>myparams(params.begin() + 1, params.end());
myparams.push_back(m_fn);
if (!m_ipath.empty())
myparams.push_back(m_ipath);
// Execute command, store the output
string& output = m_metaData[cstr_dj_keycontent];
output.erase();
ExecCmd mexec;
MEAdv adv(filtermaxseconds);
mexec.setAdvise(&adv);
mexec.putenv(m_forPreview ? "RECOLL_FILTER_FORPREVIEW=yes" :
"RECOLL_FILTER_FORPREVIEW=no");
int status;
try {
status = mexec.doexec(cmd, myparams, 0, &output);
} catch (CancelExcept) {
LOGERR(("MimeHandlerExec: cancelled\n"));
status = 0x110f;
}
if (status) {
LOGERR(("MimeHandlerExec: command status 0x%x for %s\n",
status, cmd.c_str()));
if (WIFEXITED(status) && WEXITSTATUS(status) == 127) {
// That's how execmd signals a failed exec (most probably
// a missing command). Let'hope no filter uses the same value as
// an exit status... Disable myself permanently and signal the
// missing cmd.
missingHelper = true;
m_reason = string("RECFILTERROR HELPERNOTFOUND ") + cmd;
} else if (output.find("RECFILTERROR") == 0) {
// If the output string begins with RECFILTERROR, then it's
// interpretable error information out from a recoll script
m_reason = output;
list<string> lerr;
stringToStrings(output, lerr);
if (lerr.size() > 2) {
list<string>::iterator it = lerr.begin();
it++;
if (*it == "HELPERNOTFOUND") {
// No use trying again and again to execute this filter,
// it won't work.
missingHelper = true;
}
}
}
return false;
}
finaldetails();
return true;
}
void MimeHandlerExec::handle_cs(const string& mt, const string& icharset)
{
string charset(icharset);
// cfgFilterOutputCharset comes from the mimeconf filter
// definition line and defaults to UTF-8 if empty. If the value is
// "default", we use the default input charset value defined in
// recoll.conf (which may vary depending on directory)
if (charset.empty()) {
charset = cfgFilterOutputCharset.empty() ? cstr_utf8 :
cfgFilterOutputCharset;
if (!stringlowercmp("default", charset)) {
charset = m_dfltInputCharset;
}
}
m_metaData[cstr_dj_keyorigcharset] = charset;
// If this is text/plain transcode_to/check utf-8
if (!mt.compare(cstr_textplain)) {
(void)txtdcode("mh_exec/m");
} else {
m_metaData[cstr_dj_keycharset] = charset;
}
}
void MimeHandlerExec::finaldetails()
{
// The default output mime type is html, but it may be defined
// otherwise in the filter definition.
m_metaData[cstr_dj_keymt] = cfgFilterOutputMtype.empty() ? "text/html" :
cfgFilterOutputMtype;
if (!m_forPreview) {
string md5, xmd5, reason;
if (MD5File(m_fn, md5, &reason)) {
m_metaData[cstr_dj_keymd5] = MD5HexPrint(md5, xmd5);
} else {
LOGERR(("MimeHandlerExec: cant compute md5 for [%s]: %s\n",
m_fn.c_str(), reason.c_str()));
}
}
handle_cs(m_metaData[cstr_dj_keymt]);
}