htwwwstr.c

www工具包. 这是W3C官方支持的www支撑库. 其中提供通用目的的客户端的WebAPI: complete HTTP/1.1 (with caching, pipelining, PUT, POS

	    tm.tm_hour = strtol(s, &s, 10);
	    tm.tm_min = strtol(++s, &s, 10);
	    tm.tm_sec = strtol(++s, &s, 10);

	} else {					    /* Second format */
	    HTTRACE(CORE_TRACE, "Format...... Wkd, 00 Mon 0000 00:00:00 GMT\n");
	    if ((int)strlen(s) < 20) {
		HTTRACE(CORE_TRACE, "ERROR....... Not a valid time format \"%s\"\n" _ s);
		return 0;
	    }
	    tm.tm_mday = strtol(s, &s, 10);
	    tm.tm_mon = make_month(s, &s);
	    tm.tm_year = strtol(s, &s, 10) - 1900;
	    tm.tm_hour = strtol(s, &s, 10);
	    tm.tm_min = strtol(++s, &s, 10);
	    tm.tm_sec = strtol(++s, &s, 10);
	}
    } else if (isdigit((int) *str)) {

	if (strchr(str, 'T')) {		        /* ISO (limited format) date string */
	    HTTRACE(CORE_TRACE, "Format...... YYYY.MM.DDThh:mmStzWkd\n");
	    s = (char *) str;
	    while (*s && *s==' ') s++;
	    if ((int)strlen(s) < 21) {
		HTTRACE(CORE_TRACE, "ERROR....... Not a valid time format `%s\'\n" _ s);
		return 0;
	    }
	    tm.tm_year = strtol(s, &s, 10) - 1900;
	    tm.tm_mon  = strtol(++s, &s, 10);
	    tm.tm_mday = strtol(++s, &s, 10);
	    tm.tm_hour = strtol(++s, &s, 10);
	    tm.tm_min  = strtol(++s, &s, 10);
	    tm.tm_sec  = strtol(++s, &s, 10);

	} else {					    /* delta seconds */
	    t = expand ? time(NULL) + atol(str) : atol(str);

#ifdef HTDEBUG
	    if (CORE_TRACE) {
		if (expand) {
#if defined (HAVE_CTIME_R_2)
		    char buffer[CTIME_MAX];
		    HTTRACE(CORE_TRACE, "Time string. Delta-time %s parsed to %ld seconds, or in local time: %s" _
			    str _ (long) t _ (char *) ctime_r(&t, buffer));
#elif defined(HAVE_CTIME_R_3)
		    char buffer[CTIME_MAX];
		    HTTRACE(CORE_TRACE, "Time string. Delta-time %s parsed to %ld seconds, or in local time: %s" _
			    str _ (long) t _ (char *) ctime_r(&t, buffer, CTIME_MAX));
#else
		    HTTRACE(CORE_TRACE, "Time string. Delta-time %s parsed to %ld seconds, or in local time: %s" _
			    str _ (long) t _ ctime(&t));
#endif /* HT_REENTRANT */
		} else {
		    HTTRACE(CORE_TRACE, "Time string. Delta-time %s parsed to %ld seconds\n" _ str _ (long) t);
		}
	    }
#endif /* HT_DEBUG */
	    return t;
	}

    } else {	      /* Try the other format:  Wed Jun  9 01:29:59 1993 GMT */
	HTTRACE(CORE_TRACE, "Format...... Wkd Mon 00 00:00:00 0000 GMT\n");
	s = (char *) str;
	while (*s && *s==' ') s++;
	HTTRACE(CORE_TRACE, "Trying...... The Wrong time format: %s\n" _ s);
	if ((int)strlen(s) < 24) {
	    HTTRACE(CORE_TRACE, "ERROR....... Not a valid time format \"%s\"\n" _ s);
	    return 0;
	}
	tm.tm_mon = make_month(s, &s);
	tm.tm_mday = strtol(s, &s, 10);
	tm.tm_hour = strtol(s, &s, 10);
	tm.tm_min = strtol(++s, &s, 10);
	tm.tm_sec = strtol(++s, &s, 10);
	tm.tm_year = strtol(s, &s, 10) - 1900;
    }
    if (tm.tm_sec  < 0  ||  tm.tm_sec  > 59  ||
	tm.tm_min  < 0  ||  tm.tm_min  > 59  ||
	tm.tm_hour < 0  ||  tm.tm_hour > 23  ||
	tm.tm_mday < 1  ||  tm.tm_mday > 31  ||
	tm.tm_mon  < 0  ||  tm.tm_mon  > 11  ||
	tm.tm_year <70  ||  tm.tm_year >120) {
	HTTRACE(CORE_TRACE, "ERROR....... Parsed illegal time: %02d.%02d.%02d %02d:%02d:%02d\n" _ 
	       tm.tm_mday _ tm.tm_mon+1 _ tm.tm_year _ 
	       tm.tm_hour _ tm.tm_min _ tm.tm_sec);
	return 0;
    }

#if 0
#if defined(HAVE_TIMEZONE) && defined(HAVE_ALTZONE)
    tm.tm_isdst = daylight;		       /* Already taken into account */
    HTTRACE(CORE_TRACE, "Time string. Daylight is %s\n" _
	    daylight>0 ? "on" : daylight==0 ? "off" : "unknown");
#endif
#else
    /* Let mktime decide whether we have DST or not */
    tm.tm_isdst = -1;
#endif

#ifdef HAVE_MKTIME
    t = mktime(&tm);
    t += (up ? HTUserProfile_timezone(up) : HTGetTimeZoneOffset());
#else
#ifdef HAVE_TIMEGM
    t = timegm(&tm);
#else
#error "Neither mktime nor timegm defined"
#endif /* HAVE_TIMEGM */
#endif /* HAVE_MKTIME */

    HTTRACE(CORE_TRACE, "Time string. %s parsed to %ld calendar time or `%s' in local time\n" _ 
		str _ (long) t _ ctime(&t));
    return t;
}

/*
**	Returns a string pointer to a static area of the current calendar
**	time in RFC 1123 format, for example
**
**		Sun, 06 Nov 1994 08:49:37 GMT
**
**	The result can be given in both local and GMT dependent on the flag
*/
PUBLIC const char *HTDateTimeStr (time_t * calendar, BOOL local)
{
    static char buf[40];

#ifdef HAVE_STRFTIME
    if (local) {
	/*
	** Solaris 2.3 has a bug so we _must_ use reentrant version
	** Thomas Maslen <[e-mail]>
	*/
#if defined(HT_REENTRANT) || defined(SOLARIS)
	struct tm loctime;
	localtime_r(calendar, &loctime);
	strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", &loctime);
#else
	struct tm *loctime = localtime(calendar);
	strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", loctime);
#endif /* SOLARIS || HT_REENTRANT */
    } else {
#if defined(HT_REENTRANT) || defined(SOLARIS)
	struct tm gmt;
	gmtime_r(calendar, &gmt);
    	strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", &gmt);
#else
	struct tm *gmt = gmtime(calendar);
    	strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", gmt);
#endif /* SOLARIS || HT_REENTRANT */
    }
#else
    if (local) {
#if defined(HT_REENTRANT)
	struct tm loctime;
	localtime_r(calendar, &loctime);
#else
	struct tm *loctime = localtime(calendar);
#endif /* HT_REENTRANT */
	sprintf(buf,"%s, %02d %s %04d %02d:%02d:%02d",
		wkdays[loctime->tm_wday],
		loctime->tm_mday,
		months[loctime->tm_mon],
		loctime->tm_year + 1900,
		loctime->tm_hour,
		loctime->tm_min,
		loctime->tm_sec);
    } else {
#if defined(HT_REENTRANT) || defined(SOLARIS)
	struct tm gmt;
	gmtime_r(calendar, &gmt);
#else
	struct tm *gmt = gmtime(calendar);
#endif
	sprintf(buf,"%s, %02d %s %04d %02d:%02d:%02d GMT",
		wkdays[gmt->tm_wday],
		gmt->tm_mday,
		months[gmt->tm_mon],
		gmt->tm_year + 1900,
		gmt->tm_hour,
		gmt->tm_min,
		gmt->tm_sec);
    }
#endif
    return buf;
}

/*	HTDateDirStr
**	------------
**	Generates a date string used in directory listings
*/
PUBLIC BOOL HTDateDirStr (time_t * time, char * str, int len)
{
#ifdef HAVE_STRFTIME
#if defined(HT_REENTRANT) || defined(SOLARIS)
    struct tm loctime;
    localtime_r(time, &loctime);
    strftime(str, len, "%d-%b-%Y %H:%M", &loctime);
    return YES;
#else
    strftime(str, len, "%d-%b-%Y %H:%M", localtime(time));
    return YES;
#endif /* HT_REENTRANT || SOLARIS */
#else
    if (len >= 16) {
	struct tm *loctime = localtime(time);
	sprintf(str,"%02d-%s-%02d %02d:%02d",
		loctime->tm_mday,
		months[loctime->tm_mon],
		loctime->tm_year % 100,
		loctime->tm_hour,
		loctime->tm_min);
	return YES;
    }
    return NO;
#endif /* HAVE_STRFTIME */		
}

/* 							     	HTNumToStr
**	Converts a long (byte count) to a string
**	----------------------------------------
**	This function was a PAIN!  In computer-world 1K is 1024 bytes
**	and 1M is 1024K -- however, sprintf() still formats in base-10.
**	Therefore I output only until 999, and then start using the
**	next unit.  This doesn't work wrong, it's just a feature.
**	The "str" must be large enough to contain the result.
*/
PUBLIC void HTNumToStr (unsigned long n, char * str, int len)
{
    double size = n/1024.0;
    if (len < 6) {
	*str = '\0';
	return;
    }
    if (n < 1000)
	sprintf(str, "%dK", n>0 ? 1 : 0);
    else if (size + 0.999 < 1000)
	sprintf(str, "%dK", (int)(size + 0.5));
    else if ((size /= 1024) < 9.9)
	sprintf(str, "%.1fM", (size + 0.05));
    else if (size < 1000)
	sprintf(str, "%dM", (int)(size + 0.5));
    else if ((size /= 1024) < 9.9)
	sprintf(str, "%.1fG", (size + 0.05));
    else
	sprintf(str, "%dG", (int)(size + 0.5));
}

/*
**	Matches MIME constructions for content-types and others like
**	them, for example "text/html", "text/plain". It can also match
**	wild cards like "text/<star>" and "<star>/<star>. We use <star>
**	instead of * in order note to make C like comments :-)
*/
PUBLIC BOOL HTMIMEMatch (HTAtom * tmplate, HTAtom * actual)
{
    const char *t, *a;
    char *st, *sa;
    BOOL match = NO;

    if (tmplate && actual && (t = HTAtom_name(tmplate))) {
	if (!strcmp(t, "*"))
	    return YES;

	if (strchr(t, '*') &&
	    (a = HTAtom_name(actual)) &&
	    (st = strchr(t, '/')) && (sa = strchr(a,'/'))) {

	    *sa = 0;
	    *st = 0;

	    if ((*(st-1)=='*' &&
		 (*(st+1)=='*' || !strcasecomp(st+1, sa+1))) ||
		(*(st+1)=='*' && !strcasecomp(t,a)))
		match = YES;

	    *sa = '/';
	    *st = '/';
	}    
    }
    return match;
}

/*	Convert file URLs into a local representation
**	---------------------------------------------
**	The URL has already been translated through the rules in get_physical
**	in HTAccess.c and all we need to do now is to map the path to a local
**	representation, for example if must translate '/' to the ones that
**	turn the wrong way ;-)
**	Returns:
**		OK:	local file (that must be freed by caller)
**		Error:	NULL
*/
PUBLIC char * HTWWWToLocal (const char * url, const char * base,
			    HTUserProfile * up)
{
    if (url) {
	char * access = HTParse(url, base, PARSE_ACCESS);
	char * host = HTParse(url, base, PARSE_HOST);
	char * path = HTParse(url, base, PARSE_PATH+PARSE_PUNCTUATION);
	const char * myhost = HTUserProfile_fqdn(up);

	/* Find out if this is a reference to the local file system */
	if ((*access && strcmp(access, "file") && strcmp(access, "cache")) ||
	     (*host && strcasecomp(host, "localhost") &&
	      myhost && strcmp(host, myhost))) {
	    HTTRACE(CORE_TRACE, "LocalName... Not on local file system\n");
	    HT_FREE(access);
	    HT_FREE(host);
	    HT_FREE(path);
	    return NULL;
	} else {
	    char *ptr;
	    if ((ptr = strchr(path, ';')) || (ptr = strchr(path, '?')))
		*ptr = '\0';
	
	    /*
	    ** Do whatever translation is required here in order to fit your
	    ** platform _before_ the path is unescaped.
	    */
#ifdef VMS
	    HTVMS_checkDecnet(path);
#endif
#ifdef WWW_MSWINDOWS
	    /* An absolute pathname with logical drive */
            if (*path == '/' && path[2] == ':') {
		char *orig=path, *dest=path+1;
		while((*orig++ = *dest++));

	    /* A network host */
            } else if (*host && strcasecomp(host, "localhost")) {
		char * newpath = NULL;
		StrAllocMCopy(&newpath, "//", host, path, NULL);
		HT_FREE(path);
		path = newpath;
	    }

	    /* Convert '/' to '\' */
	    {
		char *p = path;
		while (*p) {
		    if (*p=='/') *p='\\';
		    p++;
		}
	    }
#endif
	    
	    HTUnEscape(path);		  /* Take out the escaped characters */
	    HTTRACE(CORE_TRACE, "Node........ `%s' means path `%s'\n" _ url _ path);
	    HT_FREE(access);
	    HT_FREE(host);
	    return path;
	}
    }
    return NULL;
}

/*	Convert a local file name into a URL
**	------------------------------------
**	Generates a WWW URL name from a local file name or NULL if error.
**	Returns:
**		OK:	local file (that must be freed by caller)
**		Error:	NULL
*/
PUBLIC char * HTLocalToWWW (const char * local, const char * access)
{
    char * escaped = NULL;
    const char * scheme = (access && *access) ? access : "file:"; 
    if (local && *local) {
#ifdef VMS 
        char * unescaped = NULL;
        if ((unescaped = (char *) HT_MALLOC(strlen(local) + 10)) == NULL)
            HT_OUTOFMEM("HTLocalToWWW");
        strcpy(unescaped, scheme);	     /* We get an absolute file name */

	/* convert directory name to Unix-style syntax */
	{
	    char * disk = strchr (local, ':');
	    char * dir = strchr (local, '[');
	    if (disk) {
		*disk = '\0';
		strcat(unescaped, "/");
		strcat(unescaped, local);
	    }
	    if (dir) {
		char *p;
		*dir = '/';	/* Convert leading '[' */
		for (p = dir ; *p != ']'; ++p)
		    if (*p == '.') *p = '/';
		*p = '\0';	/* Cut on final ']' */
		strcat(unescaped, dir);
	    }
	}
        escaped = HTEscape(unescaped, URL_DOSFILE);
        HT_FREE(unescaped);

#else  /* not VMS */
#ifdef WIN32
        char * unescaped = NULL;
        if ((unescaped = (char *) HT_MALLOC(strlen(local) + 10)) == NULL)
            HT_OUTOFMEM("HTLocalToWWW");
        strcpy(unescaped, scheme);	     /* We get an absolute file name */
        if (strchr(local, ':')) strcat(unescaped, "/");
        {
            const char *p = local;
            char *q = unescaped+strlen(unescaped);
            while (*p) {
                if (*p=='\\') {
                    *q++='/';
                } else
                    *q++=*p;
                p++;
            }
            *q = '\0';
	}
        escaped = HTEscape(unescaped, URL_DOSFILE);
        HT_FREE(unescaped);

#else  /* Unix */
        char * escaped_path = HTEscape(local, URL_PATH);
	escaped = StrAllocMCopy(&escaped, scheme, escaped_path, NULL);
        HT_FREE(escaped_path);

#endif /* not WIN32 */
#endif /* not VMS */
    }
    return escaped;
}