recoll / Code / Diff of /src/utils/idfile.cpp

Diff of /src/utils/idfile.cpp [2a3075] .. [fca75e]

Switch to unified view


#ifndef lint
static char rcsid[] = "@(#$Id: idfile.cpp,v 1.5 2006-12-02 07:32:13 dockes Exp $ (C) 2005 J.F.Dockes";
#endif
/*
 *   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
...

#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */

/** 
 * This code is currently ONLY used to identify mbox and mail message files
 * which are badly handled by standard mime type identifiers
 * There is a very old (circa 1990) mbox format using blocks of ^A (0x01) chars
 * to separate messages, that we don't recognize currently
 */

std::list<string> idFileAllTypes()
{
    std::list<string> lst;
    lst.push_back("text/x-mail");
    lst.push_back("message/rfc822");
    return lst;
}

// Mail headers we compare to:
static const char *mailhs[] = {"From: ", "Received: ", "Message-Id: ", "To: ", 
                   "Date: ", "Subject: ", "Status: ", 
                 "In-Reply-To: "};
static const int mailhsl[] = {6, 10, 12, 4, 6, 9, 8, 13};
static const int nmh = sizeof(mailhs) / sizeof(char *);

const int wantnhead = 3;

string idFile(const char *fn)
...
    LOGERR(("idFile: could not open [%s]\n", fn));
    return string("");
    }       

    bool line1HasFrom = false;
    bool gotnonempty = false;
    int lookslikemail = 0;

    // emacs VM sometimes inserts very long lines with continuations or
    // not (for folder information). This forces us to look at many
    // lines and long ones
    int lnum = 1;
    for (int loop = 1; loop < 200; loop++, lnum++) {

#define LL 1024
    char cline[LL+1];
    cline[LL] = 0;
    input.getline(cline, LL-1);
...
        }
        // Must be eof ?
        break;
    }

  // gcount includes the \n
  int ll = input.gcount() - 1; 
  if (ll > 0)
      gotnonempty = true;

    LOGDEB2(("idfile: lnum %d ll %d: [%s]\n", lnum, ll, cline));

    // Check for a few things that can't be found in a mail file,
    // (optimization to get a quick negative)

  // Empty lines
  if (ll <= 0) {
      // Accept a few empty lines at the beginning of the file,
      // otherwise this is the end of headers
      if (gotnonempty || lnum > 10) {
      LOGDEB2(("Got empty line\n"));
      break;
      } else {
      // Don't increment the line counter for initial empty lines.
      lnum--;
      continue;
      }
  }

  // emacs vm can insert VERY long header lines.
  if (ll > 800) {
      LOGDEB2(("idFile: Line too long\n"));
      return string("");
  }

  // Check for mbox 'From ' line
  if (lnum == 1 && !strncmp("From ", cline, 5)) {
      line1HasFrom = true;
      continue;
  } 

  // Except for a possible first line with 'From ', lines must
    // begin with whitespace or have a colon 
    // (hope no one comes up with a longer header name !

    if (!isspace(cline[0])) {
        char *cp = strchr(cline, ':');
        if (cp == 0 || (cp - cline) > 70) {
        LOGDEB2(("idfile: can't be mail header line: [%s]\n", cline));
        break;
        }
    }













  // Compare to known headers
    for (int i = 0; i < nmh; i++) {
        if (!strncasecmp(mailhs[i], cline, mailhsl[i])) {
        //fprintf(stderr, "Got [%s]\n", mailhs[i]);
        lookslikemail++;
        break;
...
#include "debuglog.h"
#include "idfile.h"

int main(int argc, char **argv)
{
    if (argc < 2) {
    cerr << "Usage: idfile filename" << endl;
    exit(1);
    }
    DebugLog::getdbl()->setloglevel(DEBDEB1);
    DebugLog::setfilename("stderr");
    for (int i = 1; i < argc; i++) {
  string mime = idFile(argv[i]);
  cout << argv[i] << " : " << mime << endl;
    }
    exit(0);
}

#endif

	a/src/utils/idfile.cpp		b/src/utils/idfile.cpp
1	#ifndef lint	1	#ifndef lint
2	static char rcsid[] = "@(#$Id: idfile.cpp,v 1.4 2006-01-23 13:32:28 dockes Exp $ (C) 2005 J.F.Dockes";	2	static char rcsid[] = "@(#$Id: idfile.cpp,v 1.5 2006-12-02 07:32:13 dockes Exp $ (C) 2005 J.F.Dockes";
3	#endif	3	#endif
4	/*	4	/*
5	* This program is free software; you can redistribute it and/or modify	5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of the GNU General Public License as published by	6	* it under the terms of the GNU General Public License as published by
7	* the Free Software Foundation; either version 2 of the License, or	7	* the Free Software Foundation; either version 2 of the License, or
	...		...
29		29
30	#ifndef NO_NAMESPACES	30	#ifndef NO_NAMESPACES
31	using namespace std;	31	using namespace std;
32	#endif /* NO_NAMESPACES */	32	#endif /* NO_NAMESPACES */
33		33
		34	/**
		35	* This code is currently ONLY used to identify mbox and mail message files
		36	* which are badly handled by standard mime type identifiers
		37	* There is a very old (circa 1990) mbox format using blocks of ^A (0x01) chars
		38	* to separate messages, that we don't recognize currently
		39	*/
		40
34	std::list<string> idFileAllTypes()	41	std::list<string> idFileAllTypes()
35	{	42	{
36	std::list<string> lst;	43	std::list<string> lst;
37	lst.push_back("text/x-mail");	44	lst.push_back("text/x-mail");
38	lst.push_back("message/rfc822");	45	lst.push_back("message/rfc822");
39	return lst;	46	return lst;
40	}	47	}
41		48
42	// Mail headers we compare to:	49	// Mail headers we compare to:
43	static const char *mailhs[] = {"From: ", "Received: ", "Message-Id: ", "To: ",	50	static const char *mailhs[] = {"From: ", "Received: ", "Message-Id: ", "To: ",
44	"Date: ", "Subject: ", "Status: "};	51	"Date: ", "Subject: ", "Status: ",
		52	"In-Reply-To: "};
45	static const int mailhsl[] = {6, 10, 12, 4, 6, 9, 8};	53	static const int mailhsl[] = {6, 10, 12, 4, 6, 9, 8, 13};
46	static const int nmh = sizeof(mailhs) / sizeof(char *);	54	static const int nmh = sizeof(mailhs) / sizeof(char *);
47		55
48	const int wantnhead = 3;	56	const int wantnhead = 3;
49		57
50	string idFile(const char *fn)	58	string idFile(const char *fn)
	...		...
55	LOGERR(("idFile: could not open [%s]\n", fn));	63	LOGERR(("idFile: could not open [%s]\n", fn));
56	return string("");	64	return string("");
57	}	65	}
58		66
59	bool line1HasFrom = false;	67	bool line1HasFrom = false;
		68	bool gotnonempty = false;
60	int lookslikemail = 0;	69	int lookslikemail = 0;
61		70
62	// emacs VM sometimes inserts very long lines with continuations or	71	// emacs VM sometimes inserts very long lines with continuations or
63	// not (for folder information). This forces us to look at many	72	// not (for folder information). This forces us to look at many
64	// lines and long ones	73	// lines and long ones
		74	int lnum = 1;
65	for (int lnum = 1; lnum < 200; lnum++) {	75	for (int loop = 1; loop < 200; loop++, lnum++) {
66		76
67	#define LL 1024	77	#define LL 1024
68	char cline[LL+1];	78	char cline[LL+1];
69	cline[LL] = 0;	79	cline[LL] = 0;
70	input.getline(cline, LL-1);	80	input.getline(cline, LL-1);
	...		...
75	}	85	}
76	// Must be eof ?	86	// Must be eof ?
77	break;	87	break;
78	}	88	}
79		89
		90	// gcount includes the \n
		91	int ll = input.gcount() - 1;
		92	if (ll > 0)
		93	gotnonempty = true;
		94
80	LOGDEB2(("idfile: lnum %d : [%s]\n", lnum, cline));	95	LOGDEB2(("idfile: lnum %d ll %d: [%s]\n", lnum, ll, cline));
		96
81	// Check for a few things that can't be found in a mail file,	97	// Check for a few things that can't be found in a mail file,
82	// (optimization to get a quick negative	98	// (optimization to get a quick negative)
83		99
		100	// Empty lines
		101	if (ll <= 0) {
		102	// Accept a few empty lines at the beginning of the file,
		103	// otherwise this is the end of headers
		104	if (gotnonempty \|\| lnum > 10) {
		105	LOGDEB2(("Got empty line\n"));
		106	break;
		107	} else {
		108	// Don't increment the line counter for initial empty lines.
		109	lnum--;
		110	continue;
		111	}
		112	}
		113
		114	// emacs vm can insert VERY long header lines.
		115	if (ll > 800) {
		116	LOGDEB2(("idFile: Line too long\n"));
		117	return string("");
		118	}
		119
		120	// Check for mbox 'From ' line
		121	if (lnum == 1 && !strncmp("From ", cline, 5)) {
		122	line1HasFrom = true;
		123	continue;
		124	}
		125
		126	// Except for a possible first line with 'From ', lines must
84	// Lines must begin with whitespace or have a colon in the	127	// begin with whitespace or have a colon
85	// first 50 chars (hope no one comes up with a longer header	128	// (hope no one comes up with a longer header name !
86	// name !
87	if (!isspace(cline[0])) {	129	if (!isspace(cline[0])) {
88	char *cp = strchr(cline, ':');	130	char *cp = strchr(cline, ':');
89	if (cp == 0 \|\| (cp - cline) > 70) {	131	if (cp == 0 \|\| (cp - cline) > 70) {
90	LOGDEB2(("idfile: can't be mail header line: [%s]\n", cline));	132	LOGDEB2(("idfile: can't be mail header line: [%s]\n", cline));
91	break;	133	break;
92	}	134	}
93	}	135	}
94
95	int ll = strlen(cline);
96	if (ll > 1000) {
97	LOGDEB2(("idFile: Line too long\n"));
98	return string("");
99	}
100	if (lnum == 1) {
101	if (!strncmp("From ", cline, 5)) {
102	line1HasFrom = true;
103	continue;
104	}
105	}
106		136
		137	// Compare to known headers
107	for (int i = 0; i < nmh; i++) {	138	for (int i = 0; i < nmh; i++) {
108	if (!strncasecmp(mailhs[i], cline, mailhsl[i])) {	139	if (!strncasecmp(mailhs[i], cline, mailhsl[i])) {
109	//fprintf(stderr, "Got [%s]\n", mailhs[i]);	140	//fprintf(stderr, "Got [%s]\n", mailhs[i]);
110	lookslikemail++;	141	lookslikemail++;
111	break;	142	break;
	...		...
137	#include "debuglog.h"	168	#include "debuglog.h"
138	#include "idfile.h"	169	#include "idfile.h"
139		170
140	int main(int argc, char **argv)	171	int main(int argc, char **argv)
141	{	172	{
142	if (argc != 2) {	173	if (argc < 2) {
143	cerr << "Usage: idfile filename" << endl;	174	cerr << "Usage: idfile filename" << endl;
144	exit(1);	175	exit(1);
145	}	176	}
146	DebugLog::getdbl()->setloglevel(DEBDEB1);	177	DebugLog::getdbl()->setloglevel(DEBDEB1);
147	DebugLog::setfilename("stderr");	178	DebugLog::setfilename("stderr");
		179	for (int i = 1; i < argc; i++) {
148	string mime = idFile(argv[1]);	180	string mime = idFile(argv[i]);
149	cout << argv[1] << " : " << mime << endl;	181	cout << argv[i] << " : " << mime << endl;
		182	}
150	exit(0);	183	exit(0);
151	}	184	}
152		185
153	#endif	186	#endif