[ashd.git] / src / dirplex.c

/*
    ashd - A Sane HTTP Daemon
    Copyright (C) 2008  Fredrik Tolf <fredrik@dolda2000.com>

    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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <ctype.h>
#include <dirent.h>
#include <fnmatch.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <utils.h>
#include <mt.h>
#include <log.h>
#include <req.h>
#include <proc.h>
#include <resp.h>
#include <cf.h>

#define PAT_BASENAME 0
#define PAT_PATHNAME 1
#define PAT_ALL 2
#define PAT_DEFAULT 3

struct config {
    struct config *next, *prev;
    char *path;
    time_t mtime;
    struct child *children;
    struct pattern *patterns;
};

struct rule {
    int type;
    char *pattern;
};

struct pattern {
    struct pattern *next;
    char *childnm;
    struct rule **rules;
};

struct config *cflist;

static void freepattern(struct pattern *pat)
{
    struct rule **rule;
    
    for(rule = pat->rules; *rule; rule++) {
	if((*rule)->pattern != NULL)
	    free((*rule)->pattern);
	free(*rule);
    }
    if(pat->childnm != NULL)
	free(pat->childnm);
    free(pat);
}

static void freeconfig(struct config *cf)
{
    struct child *ch, *nch;
    struct pattern *pat, *npat;
    
    if(cf->prev != NULL)
	cf->prev->next = cf->next;
    if(cf->next != NULL)
	cf->next->prev = cf->prev;
    if(cf == cflist)
	cflist = cf->next;
    free(cf->path);
    for(ch = cf->children; ch != NULL; ch = nch) {
	nch = ch->next;
	freechild(ch);
    }
    for(pat = cf->patterns; pat != NULL; pat = npat) {
	npat = pat->next;
	freepattern(pat);
    }
    free(cf);
}

static struct child *getchild(struct config *cf, char *name)
{
    struct child *ch;
    
    for(ch = cf->children; ch; ch = ch->next) {
	if(!strcmp(ch->name, name))
	    break;
    }
    return(ch);
}

static struct rule *newrule(struct pattern *pat)
{
    int i;
    struct rule *rule;
    
    for(i = 0; pat->rules[i]; i++);
    pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2));
    rule = pat->rules[i] = szmalloc(sizeof(*rule));
    pat->rules[i + 1] = NULL;
    return(rule);
}

static struct pattern *newpattern(void)
{
    struct pattern *pat;
    
    omalloc(pat);
    pat->rules = szmalloc(sizeof(*pat->rules));
    return(pat);
}

static struct pattern *parsepattern(struct cfstate *s)
{
    struct pattern *pat;
    struct rule *rule;
    int sl;

    if(!strcmp(s->argv[0], "match")) {
	s->expstart = 1;
	pat = newpattern();
    } else {
	return(NULL);
    }
    
    sl = s->lno;
    while(1) {
	getcfline(s);
	if(!strcmp(s->argv[0], "filename")) {
	    if(s->argc < 2) {
		flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
		continue;
	    }
	    rule = newrule(pat);
	    rule->type = PAT_BASENAME;
	    rule->pattern = sstrdup(s->argv[1]);
	} else if(!strcmp(s->argv[0], "pathname")) {
	    if(s->argc < 2) {
		flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
		continue;
	    }
	    rule = newrule(pat);
	    rule->type = PAT_PATHNAME;
	    rule->pattern = sstrdup(s->argv[1]);
	} else if(!strcmp(s->argv[0], "all")) {
	    newrule(pat)->type = PAT_ALL;
	} else if(!strcmp(s->argv[0], "default")) {
	    newrule(pat)->type = PAT_DEFAULT;
	} else if(!strcmp(s->argv[0], "handler")) {
	    if(s->argc < 2) {
		flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
		continue;
	    }
	    if(pat->childnm != NULL)
		free(pat->childnm);
	    pat->childnm = sstrdup(s->argv[1]);
	} else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) {
	    break;
	} else {
	    flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
	}
    }
    
    if(pat->rules[0] == NULL) {
	flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
	freepattern(pat);
	return(NULL);
    }
    if(pat->childnm == NULL) {
	flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
	freepattern(pat);
	return(NULL);
    }
    return(pat);
}

static struct config *readconfig(char *path)
{
    struct cfstate *s;
    FILE *in;
    struct config *cf;
    struct child *child;
    struct pattern *pat;
    struct stat sb;
    char *p;
    
    p = sprintf3("%s/.htrc", path);
    if(stat(p, &sb))
	return(NULL);
    if((in = fopen(p, "r")) == NULL) {
	flog(LOG_WARNING, "%s: %s", p, strerror(errno));
	return(NULL);
    }
    s = mkcfparser(in, p);
    omalloc(cf);
    cf->mtime = sb.st_mtime;
    cf->path = sstrdup(path);
    
    while(1) {
	getcfline(s);
	if((child = parsechild(s)) != NULL) {
	    child->next = cf->children;
	    cf->children = child;
	} else if((pat = parsepattern(s)) != NULL) {
	    pat->next = cf->patterns;
	    cf->patterns = pat;
	} else if(!strcmp(s->argv[0], "eof")) {
	    break;
	} else {
	    flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
	}
    }
    
    freecfparser(s);
    fclose(in);
    return(cf);
}

static struct config *getconfig(char *path)
{
    struct config *cf;
    struct stat sb;
    
    for(cf = cflist; cf != NULL; cf = cf->next) {
	if(!strcmp(cf->path, path)) {
	    if(stat(sprintf3("%s/.htrc", path), &sb))
		return(NULL);
	    if(sb.st_mtime != cf->mtime) {
		freeconfig(cf);
		break;
	    }
	    return(cf);
	}
    }
    if((cf = readconfig(path)) != NULL) {
	cf->next = cflist;
	cflist = cf;
    }
    return(cf);
}

static struct config **getconfigs(char *file)
{
    static struct config **ret = NULL;
    struct {
	struct config **b;
	size_t s, d;
    } buf;
    struct config *cf;
    char *tmp, *p;
    
    if(ret != NULL)
	free(ret);
    bufinit(buf);
    tmp = sstrdup(file);
    while(1) {
	if((p = strrchr(tmp, '/')) == NULL)
	    break;
	*p = 0;
	if((cf = getconfig(tmp)) != NULL)
	    bufadd(buf, cf);
    }
    free(tmp);
    if((cf = getconfig(".")) != NULL)
	bufadd(buf, cf);
    bufadd(buf, NULL);
    return(ret = buf.b);
}

static struct child *findchild(char *file, char *name)
{
    int i;
    struct config **cfs;
    struct child *ch;
    
    cfs = getconfigs(file);
    for(i = 0; cfs[i] != NULL; i++) {
	if((ch = getchild(cfs[i], name)) != NULL)
	    break;
    }
    return(ch);
}

static struct pattern *findmatch(char *file, int trydefault)
{
    int i, c;
    char *bn;
    struct config **cfs;
    struct pattern *pat;
    struct rule *rule;
    
    if((bn = strrchr(file, '/')) != NULL)
	bn++;
    else
	bn = file;
    cfs = getconfigs(file);
    for(c = 0; cfs[c] != NULL; c++) {
	for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
	    for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
		if(rule->type == PAT_BASENAME) {
		    if(fnmatch(rule->pattern, bn, 0))
			break;
		} else if(rule->type == PAT_PATHNAME) {
		    if(fnmatch(rule->pattern, file, FNM_PATHNAME))
			break;
		} else if(rule->type == PAT_ALL) {
		} else if(rule->type == PAT_DEFAULT) {
		    if(!trydefault)
			break;
		}
	    }
	    if(!rule)
		return(pat);
	}
    }
    return(NULL);
}

static void handlefile(struct hthead *req, int fd, char *path)
{
    struct pattern *pat;
    struct child *ch;

    headappheader(req, "X-Ash-File", path);
    if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) {
	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
	return;
    }
    if((ch = findchild(path, pat->childnm)) == NULL) {
	flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
	simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
	return;
    }
    
    if(childhandle(ch, req, fd))
	simpleerror(fd, 500, "Server Error", "The request handler crashed.");
}

static void handledir(struct hthead *req, int fd, char *path)
{
    /* XXX: Todo */
    simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet.");
}

static int checkdir(struct hthead *req, int fd, char *path)
{
    return(0);
}

static void serve(struct hthead *req, int fd)
{
    char *p, *p2, *path, *tmp, *buf, *p3, *nm;
    struct stat sb;
    DIR *dir;
    struct dirent *dent;
    
    nm = req->rest;
    path = sstrdup(".");
    p = nm;
    while(1) {
	if((p2 = strchr(p, '/')) == NULL) {
	} else {
	    *(p2++) = 0;
	}
	
	if(!*p) {
	    if(p2 == NULL) {
		if(stat(path, &sb)) {
		    flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno));
		    simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition.");
		    goto fail;
		}
		break;
	    } else {
		simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
		goto fail;
	    }
	}
	if(*p == '.') {
	    simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
	    goto fail;
	}
	
	getconfig(path);
	
	/*
	 * First, check the name verbatimely:
	 */
	buf = sprintf3("%s/%s", path, p);
	if(!stat(buf, &sb)) {
	    if(S_ISDIR(sb.st_mode)) {
		tmp = path;
		if(!strcmp(path, "."))
		    path = sstrdup(p);
		else
		    path = sprintf2("%s/%s", path, p);
		free(tmp);
		if(p2 == NULL) {
		    stdredir(req, fd, 301, sprintf3("%s/", p));
		    goto out;
		}
		if(checkdir(req, fd, path))
		    break;
		goto next;
	    }
	    if(S_ISREG(sb.st_mode)) {
		tmp = path;
		path = sprintf2("%s/%s", path, p);
		free(tmp);
		break;
	    }
	    simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
	    goto fail;
	}

	/*
	 * Check the file extensionlessly:
	 */
	if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) {
	    while((dent = readdir(dir)) != NULL) {
		buf = sprintf3("%s/%s", path, dent->d_name);
		if((p3 = strchr(dent->d_name, '.')) != NULL)
		    *p3 = 0;
		if(strcmp(dent->d_name, p))
		    continue;
		if(stat(buf, &sb))
		    continue;
		if(!S_ISREG(sb.st_mode))
		    continue;
		tmp = path;
		path = sstrdup(buf);
		free(tmp);
		break;
	    }
	    closedir(dir);
	    if(dent != NULL)
		break;
	}
	
	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
	goto fail;
	
    next:
	if(p2 == NULL)
	    break;
	p = p2;
    }
    if(p2 == NULL)
	replrest(req, "");
    else
	replrest(req, p2);
    if(!strncmp(path, "./", 2))
	memmove(path, path + 2, strlen(path + 2) + 1);
    if(S_ISDIR(sb.st_mode)) {
	handledir(req, fd, path);
    } else if(S_ISREG(sb.st_mode)) {
	handlefile(req, fd, path);
    } else {
	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
	goto fail;
    }
    goto out;
    
fail:
    /* No special handling, for now at least. */
out:
    free(path);
}

int main(int argc, char **argv)
{
    struct hthead *req;
    int fd;
    
    if(argc < 2) {
	flog(LOG_ERR, "usage: dirplex DIR");
	exit(1);
    }
    if(chdir(argv[1])) {
	flog(LOG_ERR, "could not change directory to %s: %s", argv[1], strerror(errno));
	exit(1);
    }
    signal(SIGCHLD, SIG_IGN);
    while(1) {
	if((fd = recvreq(0, &req)) < 0) {
	    if(errno != 0)
		flog(LOG_ERR, "recvreq: %s", strerror(errno));
	    break;
	}
	serve(req, fd);
	freehthead(req);
	close(fd);
    }
    return(0);
}
Commit	Line	Data
992ce9ef FT	1	/*
	2	ashd - A Sane HTTP Daemon
	3	Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
	4
	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
	7	the Free Software Foundation, either version 3 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include <stdlib.h>
	20	#include <stdio.h>
	21	#include <string.h>
	22	#include <unistd.h>
	23	#include <errno.h>
	24	#include <sys/stat.h>
	25	#include <ctype.h>
	26	#include <dirent.h>
	27	#include <fnmatch.h>
	28
	29	#ifdef HAVE_CONFIG_H
	30	#include <config.h>
	31	#endif
	32	#include <utils.h>
	33	#include <mt.h>
	34	#include <log.h>
	35	#include <req.h>
	36	#include <proc.h>
d422fdfd	37	#include <resp.h>
06c1a718	38	#include <cf.h>
992ce9ef	39
992ce9ef FT	40	#define PAT_BASENAME 0
	41	#define PAT_PATHNAME 1
	42	#define PAT_ALL 2
	43	#define PAT_DEFAULT 3
	44
	45	struct config {
	46	struct config next, prev;
	47	char *path;
	48	time_t mtime;
	49	struct child *children;
	50	struct pattern *patterns;
	51	};
	52
992ce9ef FT	53	struct rule {
	54	int type;
	55	char *pattern;
	56	};
	57
	58	struct pattern {
	59	struct pattern *next;
	60	char *childnm;
	61	struct rule **rules;
	62	};
	63
	64	struct config *cflist;
	65
992ce9ef FT	66	static void freepattern(struct pattern *pat)
	67	{
	68	struct rule **rule;
	69
	70	for(rule = pat->rules; *rule; rule++) {
	71	if((*rule)->pattern != NULL)
	72	free((*rule)->pattern);
	73	free(*rule);
	74	}
	75	if(pat->childnm != NULL)
	76	free(pat->childnm);
	77	free(pat);
	78	}
	79
	80	static void freeconfig(struct config *cf)
	81	{
	82	struct child ch, nch;
	83	struct pattern pat, npat;
	84
	85	if(cf->prev != NULL)
	86	cf->prev->next = cf->next;
	87	if(cf->next != NULL)
	88	cf->next->prev = cf->prev;
	89	if(cf == cflist)
	90	cflist = cf->next;
	91	free(cf->path);
	92	for(ch = cf->children; ch != NULL; ch = nch) {
	93	nch = ch->next;
	94	freechild(ch);
	95	}
	96	for(pat = cf->patterns; pat != NULL; pat = npat) {
	97	npat = pat->next;
	98	freepattern(pat);
	99	}
	100	free(cf);
	101	}
	102
992ce9ef FT	103	static struct child getchild(struct config cf, char *name)
	104	{
	105	struct child *ch;
	106
	107	for(ch = cf->children; ch; ch = ch->next) {
	108	if(!strcmp(ch->name, name))
	109	break;
	110	}
	111	return(ch);
	112	}
	113
	114	static struct rule newrule(struct pattern pat)
	115	{
	116	int i;
	117	struct rule *rule;
	118
	119	for(i = 0; pat->rules[i]; i++);
	120	pat->rules = srealloc(pat->rules, sizeof(pat->rules) (i + 2));
cceb3611	121	rule = pat->rules[i] = szmalloc(sizeof(*rule));
992ce9ef FT	122	pat->rules[i + 1] = NULL;
	123	return(rule);
	124	}
	125
	126	static struct pattern *newpattern(void)
	127	{
	128	struct pattern *pat;
	129
	130	omalloc(pat);
	131	pat->rules = szmalloc(sizeof(*pat->rules));
	132	return(pat);
	133	}
	134
06c1a718 FT	135	static struct pattern parsepattern(struct cfstate s)
	136	{
	137	struct pattern *pat;
	138	struct rule *rule;
	139	int sl;
	140
	141	if(!strcmp(s->argv[0], "match")) {
	142	s->expstart = 1;
	143	pat = newpattern();
	144	} else {
	145	return(NULL);
	146	}
	147
	148	sl = s->lno;
	149	while(1) {
	150	getcfline(s);
	151	if(!strcmp(s->argv[0], "filename")) {
	152	if(s->argc < 2) {
	153	flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
	154	continue;
	155	}
	156	rule = newrule(pat);
	157	rule->type = PAT_BASENAME;
	158	rule->pattern = sstrdup(s->argv[1]);
	159	} else if(!strcmp(s->argv[0], "pathname")) {
	160	if(s->argc < 2) {
	161	flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
	162	continue;
	163	}
	164	rule = newrule(pat);
	165	rule->type = PAT_PATHNAME;
	166	rule->pattern = sstrdup(s->argv[1]);
	167	} else if(!strcmp(s->argv[0], "all")) {
	168	newrule(pat)->type = PAT_ALL;
	169	} else if(!strcmp(s->argv[0], "default")) {
	170	newrule(pat)->type = PAT_DEFAULT;
	171	} else if(!strcmp(s->argv[0], "handler")) {
	172	if(s->argc < 2) {
	173	flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
	174	continue;
	175	}
	176	if(pat->childnm != NULL)
	177	free(pat->childnm);
	178	pat->childnm = sstrdup(s->argv[1]);
	179	} else if(!strcmp(s->argv[0], "end") \|\| !strcmp(s->argv[0], "eof")) {
	180	break;
	181	} else {
	182	flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
	183	}
	184	}
	185
	186	if(pat->rules[0] == NULL) {
	187	flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
	188	freepattern(pat);
	189	return(NULL);
	190	}
	191	if(pat->childnm == NULL) {
	192	flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
	193	freepattern(pat);
	194	return(NULL);
	195	}
	196	return(pat);
	197	}
	198
992ce9ef FT	199	static struct config readconfig(char path)
992ce9ef FT	200	{
06c1a718 FT	201	struct cfstate *s;
06c1a718 FT	202	FILE *in;
992ce9ef	203	struct config *cf;
992ce9ef FT	204	struct child *child;
992ce9ef FT	205	struct pattern *pat;
992ce9ef	206	struct stat sb;
06c1a718	207	char *p;
992ce9ef	208
cceb3611 FT	209	p = sprintf3("%s/.htrc", path);
cceb3611 FT	210	if(stat(p, &sb))
992ce9ef	211	return(NULL);
06c1a718 FT	212	if((in = fopen(p, "r")) == NULL) {
06c1a718 FT	213	flog(LOG_WARNING, "%s: %s", p, strerror(errno));
992ce9ef	214	return(NULL);
06c1a718 FT	215	}
06c1a718 FT	216	s = mkcfparser(in, p);
992ce9ef FT	217	omalloc(cf);
	218	cf->mtime = sb.st_mtime;
	219	cf->path = sstrdup(path);
06c1a718 FT	220
	221	while(1) {
	222	getcfline(s);
	223	if((child = parsechild(s)) != NULL) {
	224	child->next = cf->children;
	225	cf->children = child;
	226	} else if((pat = parsepattern(s)) != NULL) {
	227	pat->next = cf->patterns;
	228	cf->patterns = pat;
	229	} else if(!strcmp(s->argv[0], "eof")) {
	230	break;
	231	} else {
	232	flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
992ce9ef	233	}
06c1a718	234	}
992ce9ef	235
06c1a718 FT	236	freecfparser(s);
06c1a718 FT	237	fclose(in);
992ce9ef FT	238	return(cf);
	239	}
	240
	241	static struct config getconfig(char path)
	242	{
	243	struct config *cf;
	244	struct stat sb;
	245
	246	for(cf = cflist; cf != NULL; cf = cf->next) {
	247	if(!strcmp(cf->path, path)) {
cceb3611	248	if(stat(sprintf3("%s/.htrc", path), &sb))
992ce9ef FT	249	return(NULL);
	250	if(sb.st_mtime != cf->mtime) {
	251	freeconfig(cf);
	252	break;
	253	}
	254	return(cf);
	255	}
	256	}
	257	if((cf = readconfig(path)) != NULL) {
	258	cf->next = cflist;
	259	cflist = cf;
	260	}
	261	return(cf);
	262	}
	263
8dce6d19	264	static struct config *getconfigs(char file)
992ce9ef	265	{
8dce6d19 FT	266	static struct config **ret = NULL;
	267	struct {
	268	struct config **b;
	269	size_t s, d;
	270	} buf;
992ce9ef	271	struct config *cf;
8dce6d19 FT	272	char tmp, p;
	273
	274	if(ret != NULL)
	275	free(ret);
	276	bufinit(buf);
	277	tmp = sstrdup(file);
992ce9ef	278	while(1) {
8dce6d19	279	if((p = strrchr(tmp, '/')) == NULL)
992ce9ef	280	break;
8dce6d19 FT	281	*p = 0;
	282	if((cf = getconfig(tmp)) != NULL)
	283	bufadd(buf, cf);
	284	}
	285	free(tmp);
	286	if((cf = getconfig(".")) != NULL)
	287	bufadd(buf, cf);
	288	bufadd(buf, NULL);
	289	return(ret = buf.b);
	290	}
	291
	292	static struct child findchild(char file, char *name)
	293	{
	294	int i;
	295	struct config **cfs;
	296	struct child *ch;
	297
	298	cfs = getconfigs(file);
	299	for(i = 0; cfs[i] != NULL; i++) {
	300	if((ch = getchild(cfs[i], name)) != NULL)
992ce9ef FT	301	break;
992ce9ef FT	302	}
992ce9ef FT	303	return(ch);
	304	}
	305
	306	static struct pattern findmatch(char file, int trydefault)
	307	{
8dce6d19 FT	308	int i, c;
	309	char *bn;
	310	struct config **cfs;
992ce9ef FT	311	struct pattern *pat;
	312	struct rule *rule;
	313
	314	if((bn = strrchr(file, '/')) != NULL)
	315	bn++;
	316	else
	317	bn = file;
8dce6d19 FT	318	cfs = getconfigs(file);
	319	for(c = 0; cfs[c] != NULL; c++) {
	320	for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
992ce9ef FT	321	for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
	322	if(rule->type == PAT_BASENAME) {
	323	if(fnmatch(rule->pattern, bn, 0))
	324	break;
	325	} else if(rule->type == PAT_PATHNAME) {
	326	if(fnmatch(rule->pattern, file, FNM_PATHNAME))
	327	break;
	328	} else if(rule->type == PAT_ALL) {
	329	} else if(rule->type == PAT_DEFAULT) {
	330	if(!trydefault)
	331	break;
	332	}
	333	}
	334	if(!rule)
8dce6d19	335	return(pat);
992ce9ef FT	336	}
992ce9ef FT	337	}
8dce6d19	338	return(NULL);
992ce9ef FT	339	}
992ce9ef FT	340
54cefaba	341	static void handlefile(struct hthead req, int fd, char path)
992ce9ef	342	{
992ce9ef FT	343	struct pattern *pat;
992ce9ef FT	344	struct child *ch;
54cefaba FT	345
	346	headappheader(req, "X-Ash-File", path);
	347	if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) {
d58ed97c	348	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
992ce9ef FT	349	return;
992ce9ef FT	350	}
54cefaba	351	if((ch = findchild(path, pat->childnm)) == NULL) {
992ce9ef	352	flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
d422fdfd	353	simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
992ce9ef FT	354	return;
	355	}
	356
d1b065b5 FT	357	if(childhandle(ch, req, fd))
d1b065b5 FT	358	simpleerror(fd, 500, "Server Error", "The request handler crashed.");
54cefaba FT	359	}
	360
	361	static void handledir(struct hthead req, int fd, char path)
	362	{
d422fdfd	363	/* XXX: Todo */
06c1a718	364	simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet.");
54cefaba FT	365	}
	366
	367	static int checkdir(struct hthead req, int fd, char path)
	368	{
	369	return(0);
	370	}
	371
	372	static void serve(struct hthead *req, int fd)
	373	{
	374	char p, p2, path, tmp, buf, p3, *nm;
	375	struct stat sb;
	376	DIR *dir;
	377	struct dirent *dent;
992ce9ef	378
54cefaba FT	379	nm = req->rest;
	380	path = sstrdup(".");
	381	p = nm;
	382	while(1) {
	383	if((p2 = strchr(p, '/')) == NULL) {
	384	} else {
	385	*(p2++) = 0;
	386	}
	387
	388	if(!*p) {
	389	if(p2 == NULL) {
	390	if(stat(path, &sb)) {
	391	flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno));
d422fdfd	392	simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition.");
54cefaba FT	393	goto fail;
	394	}
	395	break;
	396	} else {
d422fdfd	397	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
54cefaba FT	398	goto fail;
	399	}
	400	}
d422fdfd FT	401	if(*p == '.') {
d422fdfd FT	402	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
54cefaba	403	goto fail;
d422fdfd	404	}
54cefaba FT	405
	406	getconfig(path);
	407
	408	/*
	409	* First, check the name verbatimely:
	410	*/
	411	buf = sprintf3("%s/%s", path, p);
	412	if(!stat(buf, &sb)) {
	413	if(S_ISDIR(sb.st_mode)) {
	414	tmp = path;
	415	if(!strcmp(path, "."))
	416	path = sstrdup(p);
	417	else
	418	path = sprintf2("%s/%s", path, p);
	419	free(tmp);
755faed0 FT	420	if(p2 == NULL) {
	421	stdredir(req, fd, 301, sprintf3("%s/", p));
	422	goto out;
	423	}
54cefaba FT	424	if(checkdir(req, fd, path))
	425	break;
	426	goto next;
	427	}
	428	if(S_ISREG(sb.st_mode)) {
	429	tmp = path;
	430	path = sprintf2("%s/%s", path, p);
	431	free(tmp);
	432	break;
	433	}
d422fdfd	434	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
54cefaba FT	435	goto fail;
	436	}
	437
	438	/*
	439	* Check the file extensionlessly:
	440	*/
	441	if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) {
	442	while((dent = readdir(dir)) != NULL) {
	443	buf = sprintf3("%s/%s", path, dent->d_name);
	444	if((p3 = strchr(dent->d_name, '.')) != NULL)
	445	*p3 = 0;
	446	if(strcmp(dent->d_name, p))
	447	continue;
	448	if(stat(buf, &sb))
	449	continue;
	450	if(!S_ISREG(sb.st_mode))
	451	continue;
	452	tmp = path;
	453	path = sstrdup(buf);
	454	free(tmp);
	455	break;
	456	}
	457	closedir(dir);
	458	if(dent != NULL)
	459	break;
	460	}
	461
d422fdfd	462	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
54cefaba FT	463	goto fail;
	464
	465	next:
	466	if(p2 == NULL)
	467	break;
	468	p = p2;
	469	}
	470	if(p2 == NULL)
	471	replrest(req, "");
	472	else
	473	replrest(req, p2);
	474	if(!strncmp(path, "./", 2))
	475	memmove(path, path + 2, strlen(path + 2) + 1);
	476	if(S_ISDIR(sb.st_mode)) {
	477	handledir(req, fd, path);
	478	} else if(S_ISREG(sb.st_mode)) {
	479	handlefile(req, fd, path);
	480	} else {
d422fdfd	481	simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
54cefaba FT	482	goto fail;
	483	}
	484	goto out;
	485
	486	fail:
d422fdfd	487	/* No special handling, for now at least. */
54cefaba FT	488	out:
54cefaba FT	489	free(path);
992ce9ef FT	490	}
	491
	492	int main(int argc, char **argv)
	493	{
	494	struct hthead *req;
	495	int fd;
	496
	497	if(argc < 2) {
	498	flog(LOG_ERR, "usage: dirplex DIR");
	499	exit(1);
	500	}
	501	if(chdir(argv[1])) {
	502	flog(LOG_ERR, "could not change directory to %s: %s", argv[1], strerror(errno));
	503	exit(1);
	504	}
	505	signal(SIGCHLD, SIG_IGN);
	506	while(1) {
	507	if((fd = recvreq(0, &req)) < 0) {
	508	if(errno != 0)
	509	flog(LOG_ERR, "recvreq: %s", strerror(errno));
	510	break;
	511	}
	512	serve(req, fd);
	513	freehthead(req);
	514	close(fd);
	515	}
	516	return(0);
	517	}