[ashd.git] / src / accesslog.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 <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/poll.h>
#include <time.h>
#include <sys/time.h>
#include <signal.h>

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

#define DEFFORMAT "%{%Y-%m-%d %H:%M:%S}t %m %u %A \"%G\""

static int ch;
static char *outname = NULL;
static FILE *out;
static int flush = 1;
static char *format;
static time_t now;
static volatile int reopen = 0;

static void qputs(char *s, FILE *o)
{
    for(; *s; s++) {
	if(*s == '\"') {
	    fputs("\\\"", o);
	} else if(*s == '\\') {
	    fputs("\\\\", o);
	} else if(*s == '\n') {
	    fputs("\\n", o);
	} else if(*s == '\t') {
	    fputs("\\t", o);
	} else if((*s < 32) || (*s >= 128)) {
	    fprintf(o, "\\x%02x", *s);
	} else {
	    fputc(*s, o);
	}
    }
}

static void logitem(struct hthead *req, char o, char *d)
{
    char *h, *p;
    char buf[1024];
    struct timeval tv;
    
    switch(o) {
    case '%':
	putc('%', out);
	break;
    case 'h':
	if((h = getheader(req, d)) == NULL) {
	    putc('-', out);
	} else {
	    qputs(h, out);
	}
	break;
    case 'u':
	qputs(req->url, out);
	break;
    case 'U':
	strcpy(buf, req->url);
	if((p = strchr(buf, '?')) != NULL)
	    *p = 0;
	qputs(buf, out);
	break;
    case 'm':
	qputs(req->method, out);
	break;
    case 'r':
	qputs(req->rest, out);
	break;
    case 'v':
	qputs(req->ver, out);
	break;
    case 't':
	if(!*d)
	    d = "%a, %d %b %Y %H:%M:%S %z";
	strftime(buf, sizeof(buf), d, localtime(&now));
	qputs(buf, out);
	break;
    case 'T':
	if(!*d)
	    d = "%a, %d %b %Y %H:%M:%S %z";
	strftime(buf, sizeof(buf), d, gmtime(&now));
	qputs(buf, out);
	break;
    case 's':
	gettimeofday(&tv, NULL);
	fprintf(out, "%06i", (int)tv.tv_usec);
	break;
    case 'A':
	logitem(req, 'h', "X-Ash-Address");
	break;
    case 'H':
	logitem(req, 'h', "Host");
	break;
    case 'R':
	logitem(req, 'h', "Referer");
	break;
    case 'G':
	logitem(req, 'h', "User-Agent");
	break;
    }
}

static void logreq(struct hthead *req)
{
    char *p, *p2;
    char d[strlen(format)];
    char o;
    
    p = format;
    while(*p) {
	if(*p == '%') {
	    p++;
	    if(*p == '{') {
		p++;
		if((p2 = strchr(p, '}')) == NULL)
		    continue;
		memcpy(d, p, p2 - p);
		d[p2 - p] = 0;
		p = p2 + 1;
	    } else {
		d[0] = 0;
	    }
	    o = *p++;
	    if(o == 0)
		break;
	    logitem(req, o, d);
	} else {
	    fputc(*p++, out);
	}
    }
    fputc('\n', out);
    if(flush)
	fflush(out);
}

static void serve(struct hthead *req, int fd)
{
    now = time(NULL);
    if(sendreq(ch, req, fd)) {
	flog(LOG_ERR, "accesslog: could not pass request to child: %s", strerror(errno));
	exit(1);
    }
    logreq(req);
}

static void sighandler(int sig)
{
    if(sig == SIGHUP)
	reopen = 1;
}

static void reopenlog(void)
{
    FILE *new;
    
    if(outname == NULL) {
	flog(LOG_WARNING, "accesslog: received SIGHUP but logging to stdout, so ignoring");
	return;
    }
    if((new = fopen(outname, "a")) == NULL) {
	flog(LOG_WARNING, "accesslog: could not reopen log file `%s' on SIGHUP: %s", outname, strerror(errno));
	return;
    }
    fclose(out);
    out = new;
}

static void usage(FILE *out)
{
    fprintf(out, "usage: accesslog [-hFa] [-f FORMAT] OUTFILE CHILD [ARGS...]\n");
}

int main(int argc, char **argv)
{
    int c, ret;
    struct hthead *req;
    int fd;
    struct pollfd pfd[2];
    
    optarg = NULL;
    while((c = getopt(argc, argv, "+hFaf:")) >= 0) {
	switch(c) {
	case 'h':
	    usage(stdout);
	    exit(0);
	case 'F':
	    flush = 0;
	    break;
	case 'f':
	    format = optarg;
	    break;
	case 'a':
	    format = "%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] \"%m %u %v\" - - \"%R\" \"%G\"";
	    break;
	default:
	    usage(stderr);
	    exit(1);
	}
    }
    if(argc - optind < 2) {
	usage(stderr);
	exit(1);
    }
    if(format == NULL)
	format = DEFFORMAT;
    if(!strcmp(argv[optind], "-"))
	outname = NULL;
    else
	outname = argv[optind];
    if(outname == NULL) {
	out = stdout;
    } else {
	if((out = fopen(argv[optind], "a")) == NULL) {
	    flog(LOG_ERR, "accesslog: could not open %s for logging: %s", argv[optind], strerror(errno));
	    exit(1);
	}
    }
    if((ch = stdmkchild(argv + optind + 1, NULL, NULL)) < 0) {
	flog(LOG_ERR, "accesslog: could fork child: %s", strerror(errno));
	exit(1);
    }
    signal(SIGHUP, sighandler);
    while(1) {
	if(reopen) {
	    reopenlog();
	    reopen = 0;
	}
	memset(pfd, 0, sizeof(pfd));
	pfd[0].fd = 0;
	pfd[0].events = POLLIN;
	pfd[1].fd = ch;
	pfd[1].events = POLLHUP;
	if((ret = poll(pfd, 2, -1)) < 0) {
	    if(errno != EINTR) {
		flog(LOG_ERR, "accesslog: error in poll: %s", strerror(errno));
		exit(1);
	    }
	}
	if(pfd[0].revents) {
	    if((fd = recvreq(0, &req)) < 0) {
		if(errno == 0)
		    break;
		flog(LOG_ERR, "accesslog: error in recvreq: %s", strerror(errno));
		exit(1);
	    }
	    serve(req, fd);
	    freehthead(req);
	    close(fd);
	}
	if(pfd[1].revents & POLLHUP)
	    break;
    }
    return(0);
}
Commit	Line	Data
048ac115 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 <unistd.h>
	22	#include <string.h>
	23	#include <errno.h>
	24	#include <sys/poll.h>
	25	#include <time.h>
	26	#include <sys/time.h>
f99bcc64	27	#include <signal.h>
048ac115 FT	28
	29	#ifdef HAVE_CONFIG_H
	30	#include <config.h>
	31	#endif
	32	#include <utils.h>
	33	#include <log.h>
	34	#include <req.h>
	35	#include <proc.h>
	36
	37	#define DEFFORMAT "%{%Y-%m-%d %H:%M:%S}t %m %u %A \"%G\""
	38
	39	static int ch;
f99bcc64	40	static char *outname = NULL;
048ac115 FT	41	static FILE *out;
	42	static int flush = 1;
	43	static char *format;
	44	static time_t now;
f99bcc64	45	static volatile int reopen = 0;
048ac115 FT	46
	47	static void qputs(char s, FILE o)
	48	{
	49	for(; *s; s++) {
	50	if(*s == '\"') {
	51	fputs("\\\"", o);
	52	} else if(*s == '\\') {
	53	fputs("\\\\", o);
	54	} else if(*s == '\n') {
	55	fputs("\\n", o);
	56	} else if(*s == '\t') {
	57	fputs("\\t", o);
	58	} else if((s < 32) \|\| (s >= 128)) {
	59	fprintf(o, "\\x%02x", *s);
	60	} else {
	61	fputc(*s, o);
	62	}
	63	}
	64	}
	65
	66	static void logitem(struct hthead req, char o, char d)
	67	{
	68	char h, p;
	69	char buf[1024];
	70	struct timeval tv;
	71
	72	switch(o) {
	73	case '%':
	74	putc('%', out);
	75	break;
	76	case 'h':
	77	if((h = getheader(req, d)) == NULL) {
	78	putc('-', out);
	79	} else {
	80	qputs(h, out);
	81	}
	82	break;
	83	case 'u':
	84	qputs(req->url, out);
	85	break;
	86	case 'U':
	87	strcpy(buf, req->url);
	88	if((p = strchr(buf, '?')) != NULL)
	89	*p = 0;
	90	qputs(buf, out);
	91	break;
	92	case 'm':
	93	qputs(req->method, out);
	94	break;
	95	case 'r':
	96	qputs(req->rest, out);
	97	break;
	98	case 'v':
	99	qputs(req->ver, out);
	100	break;
	101	case 't':
	102	if(!*d)
	103	d = "%a, %d %b %Y %H:%M:%S %z";
	104	strftime(buf, sizeof(buf), d, localtime(&now));
	105	qputs(buf, out);
	106	break;
	107	case 'T':
	108	if(!*d)
	109	d = "%a, %d %b %Y %H:%M:%S %z";
110	strftime(buf, sizeof(buf), d, gmtime(&now));
111	qputs(buf, out);
112	break;
113	case 's':
114	gettimeofday(&tv, NULL);
115	fprintf(out, "%06i", (int)tv.tv_usec);
116	break;
117	case 'A':
118	logitem(req, 'h', "X-Ash-Address");
119	break;
120	case 'H':
121	logitem(req, 'h', "Host");
122	break;
123	case 'R':
124	logitem(req, 'h', "Referer");
125	break;
126	case 'G':
127	logitem(req, 'h', "User-Agent");
128	break;
129	}
130	}
131
132	static void logreq(struct hthead *req)
133	{
134	char p, p2;
135	char d[strlen(format)];
136	char o;
137
138	p = format;
139	while(*p) {
140	if(*p == '%') {
141	p++;
142	if(*p == '{') {
143	p++;
144	if((p2 = strchr(p, '}')) == NULL)
145	continue;
146	memcpy(d, p, p2 - p);
147	d[p2 - p] = 0;
148	p = p2 + 1;
149	} else {
150	d[0] = 0;
151	}
152	o = *p++;
153	if(o == 0)
154	break;
155	logitem(req, o, d);
156	} else {
157	fputc(*p++, out);
158	}
159	}
160	fputc('\n', out);
161	if(flush)
162	fflush(out);
163	}
164
165	static void serve(struct hthead *req, int fd)
166	{
167	now = time(NULL);
168	if(sendreq(ch, req, fd)) {
169	flog(LOG_ERR, "accesslog: could not pass request to child: %s", strerror(errno));
170	exit(1);
171	}
172	logreq(req);
173	}
174
f99bcc64 FT	175	static void sighandler(int sig)
	176	{
	177	if(sig == SIGHUP)
	178	reopen = 1;
	179	}
	180
	181	static void reopenlog(void)
	182	{
	183	FILE *new;
	184
	185	if(outname == NULL) {
	186	flog(LOG_WARNING, "accesslog: received SIGHUP but logging to stdout, so ignoring");
	187	return;
	188	}
	189	if((new = fopen(outname, "a")) == NULL) {
	190	flog(LOG_WARNING, "accesslog: could not reopen log file `%s' on SIGHUP: %s", outname, strerror(errno));
	191	return;
	192	}
	193	fclose(out);
	194	out = new;
	195	}
	196
048ac115 FT	197	static void usage(FILE *out)
048ac115 FT	198	{
9701afc5	199	fprintf(out, "usage: accesslog [-hFa] [-f FORMAT] OUTFILE CHILD [ARGS...]\n");
048ac115 FT	200	}
	201
	202	int main(int argc, char **argv)
	203	{
	204	int c, ret;
	205	struct hthead *req;
	206	int fd;
	207	struct pollfd pfd[2];
048ac115 FT	208
048ac115 FT	209	optarg = NULL;
9701afc5	210	while((c = getopt(argc, argv, "+hFaf:")) >= 0) {
048ac115 FT	211	switch(c) {
	212	case 'h':
	213	usage(stdout);
	214	exit(0);
048ac115 FT	215	case 'F':
	216	flush = 0;
	217	break;
	218	case 'f':
	219	format = optarg;
	220	break;
	221	case 'a':
	222	format = "%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] \"%m %u %v\" - - \"%R\" \"%G\"";
	223	break;
	224	default:
	225	usage(stderr);
	226	exit(1);
	227	}
	228	}
9701afc5	229	if(argc - optind < 2) {
048ac115 FT	230	usage(stderr);
	231	exit(1);
	232	}
	233	if(format == NULL)
	234	format = DEFFORMAT;
f99bcc64 FT	235	if(!strcmp(argv[optind], "-"))
	236	outname = NULL;
	237	else
	238	outname = argv[optind];
	239	if(outname == NULL) {
9701afc5 FT	240	out = stdout;
	241	} else {
	242	if((out = fopen(argv[optind], "a")) == NULL) {
	243	flog(LOG_ERR, "accesslog: could not open %s for logging: %s", argv[optind], strerror(errno));
048ac115 FT	244	exit(1);
048ac115 FT	245	}
048ac115	246	}
9701afc5	247	if((ch = stdmkchild(argv + optind + 1, NULL, NULL)) < 0) {
048ac115 FT	248	flog(LOG_ERR, "accesslog: could fork child: %s", strerror(errno));
	249	exit(1);
	250	}
f99bcc64	251	signal(SIGHUP, sighandler);
048ac115	252	while(1) {
f99bcc64 FT	253	if(reopen) {
	254	reopenlog();
	255	reopen = 0;
	256	}
048ac115 FT	257	memset(pfd, 0, sizeof(pfd));
	258	pfd[0].fd = 0;
	259	pfd[0].events = POLLIN;
	260	pfd[1].fd = ch;
	261	pfd[1].events = POLLHUP;
	262	if((ret = poll(pfd, 2, -1)) < 0) {
	263	if(errno != EINTR) {
	264	flog(LOG_ERR, "accesslog: error in poll: %s", strerror(errno));
	265	exit(1);
	266	}
	267	}
	268	if(pfd[0].revents) {
	269	if((fd = recvreq(0, &req)) < 0) {
	270	if(errno == 0)
	271	break;
	272	flog(LOG_ERR, "accesslog: error in recvreq: %s", strerror(errno));
	273	exit(1);
	274	}
	275	serve(req, fd);
	276	freehthead(req);
	277	close(fd);
	278	}
	279	if(pfd[1].revents & POLLHUP)
	280	break;
	281	}
	282	return(0);
	283	}