Parent: [bc207a] (diff)

Child: [96dba3] (diff)

Download this file

internfile.h    175 lines (156 with data), 6.7 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
/*
* 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.
*/
#ifndef _INTERNFILE_H_INCLUDED_
#define _INTERNFILE_H_INCLUDED_
/* @(#$Id: internfile.h,v 1.21 2008-10-08 16:15:22 dockes Exp $ (C) 2004 J.F.Dockes */
#include <string>
#include <vector>
#include <map>
#include <set>
using std::string;
using std::vector;
using std::map;
using std::set;
#include "pathut.h"
#include "Filter.h"
// Beware: the class changes according to RCL_USE_XATTR, so any file
// including this needs autoconfig.h
#include "autoconfig.h"
class RclConfig;
namespace Rcl {
class Doc;
}
struct stat;
/**
* A class to convert a file into possibly multiple documents in internal
* representation.
*/
class FileInterner {
public:
/**
* Get immediate parent for document.
*
* This is not in general the same as the "parent" document used
* with Rcl::Db::addOrUpdate(). The latter is generally the enclosing file.
*/
static bool getEnclosing(const string &url, const string &ipath,
string &eurl, string &eipath);
/**
* Identify and possibly decompress file, create adequate
* handler. The mtype parameter is only set when the object is
* created for previewing a file. Filter output may be
* different for previewing and indexing.
*
* @param fn file name
* @param stp pointer to updated stat struct.
* @param cnf Recoll configuration
* @param td temporary directory to use as working space if
* decompression needed. Must be private and will be wiped clean.
* @param mtype mime type if known. For a compressed file this is the
* mime type for the uncompressed version. This currently doubles up
* to indicate that this object is for previewing (not indexing).
*/
FileInterner(const string &fn, const struct stat *stp,
RclConfig *cnf, const string& td,
const string *mtype = 0);
~FileInterner();
/// Return values for internfile()
enum Status {FIError, FIDone, FIAgain};
/**
* Turn file or file part into Recoll document.
*
* For multidocument files (ie: mail folder), this must be called multiple
* times to retrieve the subdocuments
* @param doc output document
* @param ipath internal path. If set by caller, the specified subdoc will
* be returned. Else the next document according to current state will
* be returned, and the internal path will be set.
* @return FIError and FIDone are self-explanatory. If FIAgain is returned,
* this is a multi-document file, with more subdocs, and internfile()
* should be called again to get the following one(s).
*/
Status internfile(Rcl::Doc& doc, string &ipath);
/** Return the file's mimetype (useful for container files) */
const string& getMimetype() {return m_mimetype;}
/** We normally always return text/plain data. A caller can request
* that we stop conversion at the native document type (ie: extracting
* an email attachment and starting an external viewer)
*/
void setTargetMType(const string& tp) {m_targetMType = tp;}
/* In case we see an html version, it's set aside and can be recovered */
const string& get_html() {return m_html;}
/** Extract internal document into temporary file.
* This is used mainly for starting an external viewer for a
* subdocument (ie: mail attachment).
* @return true for success.
* @param temp output reference-counted temp file object (goes
* away magically). Only used if tofile.empty()
* @param tofile output file if not null
* @param cnf The recoll config
* @param fn The main document from which to extract
* @param ipath The internal path to the subdoc
* @param mtype The target mime type (we don't want to decode to text!)
*/
static bool idocToFile(TempFile& temp, const string& tofile,
RclConfig *cnf, const string& fn,
const string& ipath, const string& mtype);
const string& getReason() const {return m_reason;}
static void getMissingExternal(string& missing);
static void getMissingDescription(string& desc);
private:
static const unsigned int MAXHANDLERS = 20;
RclConfig *m_cfg;
string m_fn;
string m_mimetype; // Mime type for [uncompressed] file
bool m_forPreview;
string m_html; // Possibly set-aside html text for preview
string m_targetMType;
string m_reachedMType; // target or text/plain
// m_tdir and m_tfile are used only for decompressing input file if needed
const string& m_tdir;
string m_tfile;
#ifdef RCL_USE_XATTR
// Fields found in file extended attributes. This is kept here,
// not in the file-level handler because we are only interested in
// the top-level file, not any temp file necessitated by
// processing the internal doc hierarchy.
map<string, string> m_XAttrsFields;
#endif // RCL_USE_XATTR
// Filter stack, path to the current document from which we're
// fetching subdocs
vector<Dijon::Filter*> m_handlers;
// Temporary files used for decoding the current stack
bool m_tmpflgs[MAXHANDLERS];
vector<TempFile> m_tempfiles;
// Error data if any
string m_reason;
// Missing external programs
static set<string> o_missingExternal;
static map<string, set<string> > o_typesForMissing;
void tmpcleanup();
bool dijontorcl(Rcl::Doc&);
void collectIpathAndMT(Rcl::Doc&, string& ipath) const;
bool dataToTempFile(const string& data, const string& mt, string& fn);
void popHandler();
int addHandler();
void checkExternalMissing(const string& msg, const string& mt);
void processNextDocError(Rcl::Doc &doc, string& ipath);
#ifdef RCL_USE_XATTR
void reapXAttrs(const string& fn);
#endif
};
#endif /* _INTERNFILE_H_INCLUDED_ */