#ifndef lint
static char rcsid[] = "@(#$Id: idfile.cpp,v 1.3 2005-11-24 07:16:16 dockes Exp $ (C) 2005 J.F.Dockes";
#endif
#ifndef TEST_IDFILE
#include <unistd.h> // for access(2)
#include <ctype.h>
#include <fstream>
#include <sstream>
#include "idfile.h"
#include "debuglog.h"
#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */
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: "};
static const int mailhsl[] = {6, 10, 12, 4, 6, 9, 8};
static const int nmh = sizeof(mailhs) / sizeof(char *);
const int wantnhead = 3;
string idFile(const char *fn)
{
ifstream input;
input.open(fn, ios::in);
if (!input.is_open()) {
LOGERR(("idFile: could not open [%s]\n", fn));
return string("");
}
bool line1HasFrom = 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
for (int lnum = 1; lnum < 200; lnum++) {
#define LL 1024
char cline[LL+1];
cline[LL] = 0;
input.getline(cline, LL-1);
if (input.fail()) {
if (input.bad()) {
LOGERR(("idfile: error while reading [%s]\n", fn));
return string("");
}
// Must be eof ?
break;
}
LOGDEB2(("idfile: lnum %d : [%s]\n", lnum, cline));
// Check for a few things that can't be found in a mail file,
// (optimization to get a quick negative
// Lines must begin with whitespace or have a colon in the
// first 50 chars (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;
}
}
int ll = strlen(cline);
if (ll > 1000) {
LOGDEB2(("idFile: Line too long\n"));
return string("");
}
if (lnum == 1) {
if (!strncmp("From ", cline, 5)) {
line1HasFrom = true;
continue;
}
}
for (int i = 0; i < nmh; i++) {
if (!strncasecmp(mailhs[i], cline, mailhsl[i])) {
//fprintf(stderr, "Got [%s]\n", mailhs[i]);
lookslikemail++;
break;
}
}
if (lookslikemail >= wantnhead)
break;
}
if (line1HasFrom)
lookslikemail++;
if (lookslikemail >= wantnhead)
return line1HasFrom ? string("text/x-mail") : string("message/rfc822");
return string("");
}
#else
#include <string>
#include <iostream>
#include <unistd.h>
#include <fcntl.h>
using namespace std;
#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");
string mime = idFile(argv[1]);
cout << argv[1] << " : " << mime << endl;
exit(0);
}
#endif