#include <u.h>#include <libc.h>#include "httpd.h"#include "httpsrv.h" int		logall[3];  /* logall[2] is in "Common Log Format" */ static char *monname[12] ={	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; voidlogit(HConnect *c, char *fmt, ...){	char buf[4096];	va_list arg;	HSPriv *p; 	va_start(arg, fmt);	vseprint(buf, buf+sizeof(buf), fmt, arg);	va_end(arg);	p = nil;	if(c != nil)		p = c->private;	if(p != nil && p->remotesys != nil)		syslog(0, HTTPLOG, "%s %s", p->remotesys, buf);	else		syslog(0, HTTPLOG, "%s", buf);} voidwritelog(HConnect *c, char *fmt, ...){	HSPriv *p;	char buf[HBufSize+500], *bufp, *bufe;	char statuscode[4];	vlong objectsize;	ulong now, today;	int logfd;	va_list arg;	Tm *tm; 	if(c == nil)		return;	p = c->private;	bufe = buf + sizeof(buf);	now = time(nil);	tm = gmtime(now);	today = now / (24*60*60); 	/* verbose logfile, for research on web traffic */	logfd = logall[today & 1];	if(logfd > 0){		if(c->hstop == c->header || c->hstop[-1] != '\n')			*c->hstop = '\n';		*c->hstop = '\0';		bufp = seprint(buf, bufe, "==========\n");		bufp = seprint(bufp, bufe, "LogTime:  %D\n", now);		bufp = seprint(bufp, bufe, "ConnTime: %D\n", c->reqtime);		bufp = seprint(bufp, bufe, "RemoteIP: %s\n", p->remotesys);		bufp = seprint(bufp, bufe, "Port: %s\n", p->remoteserv);		va_start(arg, fmt);		bufp = vseprint(bufp, bufe, fmt, arg);		va_end(arg);		if(c->req.uri != nil && c->req.uri[0] != 0)			bufp = seprint(bufp, bufe, "FinalURI: %s\n", c->req.uri);		bufp = seprint(bufp, bufe, "----------\n%s\n", (char*)c->header);		write(logfd, buf, bufp-buf);   /* append-only file */	} 	/* another log, with less information but formatted for common analysis tools */	if(logall[2] > 0 && strncmp(fmt, "Reply: ", 7) == 0){		objectsize = 0;		strecpy(statuscode, statuscode+4, fmt+7);		if( fmt[7] == '%'){			va_start(arg, fmt);			vseprint(statuscode, statuscode+4, fmt+7, arg);			va_end(arg);		}else if(			strcmp(fmt+7, "200 file %lld %lld\n") == 0 ||			strcmp(fmt+7, "206 partial content %lld %lld\n") == 0 ||			strcmp(fmt+7, "206 partial content, early termination %lld %lld\n") == 0){			va_start(arg, fmt);			objectsize = va_arg(arg, vlong); /* length in sendfd.c */			USED(objectsize);			objectsize = va_arg(arg, vlong); /* wrote in sendfd.c */			va_end(arg);		}		bufp = seprint(buf, bufe, "%s - -", p->remotesys);		bufp = seprint(bufp, bufe, " [%.2d/%s/%d:%.2d:%.2d:%.2d +0000]", tm->mday, monname[tm->mon], tm->year+1900, tm->hour, tm->min, tm->sec);		if(c->req.uri == nil || c->req.uri[0] == 0){			bufp = seprint(bufp, bufe, " \"%.*s\"",				(int)utfnlen((char*)c->header, strcspn((char*)c->header, "\r\n")),				(char*)c->header);		}else{			/* use more canonical form of URI, if available */			bufp = seprint(bufp, bufe, " \"%s %s HTTP/%d.%d\"", c->req.meth, c->req.uri, c->req.vermaj,  c->req.vermin);		}		bufp = seprint(bufp, bufe, " %s %lld\n", statuscode, objectsize);		write(logall[2], buf, bufp-buf);   /* append-only file */	}}