/*
* http_log.c: Dealing with the logs and errors
*
* Rob McCool
*
*/
#include "httpd.h"
FILE *error_log;
static FILE *xfer_log;
void open_logs() {
if(!(error_log = fopen(error_fname,"a"))) {
fprintf(stderr,"httpd: could not open error log file %s.\n",
error_fname);
perror("fopen");
exit(1);
}
if(!(xfer_log = fopen(xfer_fname,"a"))) {
fprintf(stderr,"httpd: could not open transfer log file %s.\n",
xfer_fname);
perror("fopen");
exit(1);
}
}
void close_logs() {
fclose(xfer_log);
fclose(error_log);
}
void error_log2stderr() {
if(fileno(error_log) != STDERR_FILENO)
dup2(fileno(error_log),STDERR_FILENO);
}
void log_pid() {
FILE *pid_file;
if(!(pid_file = fopen(pid_fname,"w"))) {
fprintf(stderr,"httpd: could not log pid to file %s\n",pid_fname);
exit(1);
}
fprintf(pid_file,"%d\n",getpid());
fclose(pid_file);
}
static char the_request[HUGE_STRING_LEN];
int status;
int bytes_sent;
void record_request(char *cmd_line) {
status = -1;
bytes_sent = -1;
strcpy(the_request,cmd_line);
}
void log_transaction() {
char str[HUGE_STRING_LEN];
long timz;
struct tm *t;
char tstr[MAX_STRING_LEN],sign;
t = get_gmtoff(&timz);
sign = (timz < 0 ? '-' : '+');
if(timz < 0)
timz = -timz;
strftime(tstr,MAX_STRING_LEN,"%d/%b/%Y:%H:%M:%S",t);
sprintf(str,"%s %s %s [%s %c%02d%02d] \"%s\" ",
remote_name,
(do_rfc931 ? remote_logname : "-"),
(user[0] ? user : "-"),
tstr,
sign,
timz/3600,
timz%3600,
the_request);
if(status != -1)
sprintf(str,"%s%d ",str,status);
else
strcat(str,"- ");
if(bytes_sent != -1)
sprintf(str,"%s%d",str,bytes_sent);
else
strcat(str,"- ");
fprintf(xfer_log,"%s\n",str);
fclose(xfer_log);
}
void log_error(char *err) {
fprintf(error_log, "[%s] %s\n",get_time(),err);
fclose(error_log);
}
void log_error_noclose(char *err) {
fprintf(error_log, "[%s] %s\n",get_time(),err);
fflush(error_log);
}
void log_reason(char *reason, char *file) {
char t[MAX_STRING_LEN];
sprintf(t,"httpd: access to %s failed for %s, reason: %s",
file,remote_name,reason);
log_error(t);
}
void begin_http_header(FILE *fd, char *msg) {
fprintf(fd,"%s %s%c",SERVER_PROTOCOL,msg,LF);
dump_default_header(fd);
}
void error_head(FILE *fd, char *err) {
if(!assbackwards) {
begin_http_header(fd,err);
fprintf(fd,"Content-type: text/html%c%c",LF,LF);
}
if(!header_only) {
fprintf(fd,"%s%c",err,LF);
fprintf(fd,"%s
%c",err,LF);
}
}
void title_html(FILE *fd, char *msg) {
fprintf(fd,"%s%c",msg,LF);
fprintf(fd,"%s
%c",msg,LF);
}
void die(int type, char *err_string, FILE *fd) {
char t[MAX_STRING_LEN];
switch(type) {
case REDIRECT:
status = 302;
if(!assbackwards) {
begin_http_header(fd,"302 Found");
fprintf(fd,"Location: %s%c",err_string,LF);
fprintf(fd,"Content-type: text/html%c",LF);
fputc(LF,fd);
}
if(header_only) break;
title_html(fd,"Document moved");
fprintf(fd,"This document has moved here.%c",
err_string,LF);
break;
case USE_LOCAL_COPY:
status = USE_LOCAL_COPY;
begin_http_header(fd,"304 Not modified");
fputc(LF,fd);
header_only = 1;
break;
case AUTH_REQUIRED:
status = 401;
if(!assbackwards) {
begin_http_header(fd,"401 Unauthorized");
fprintf(fd,"Content-type: text/html%c",LF);
fprintf(fd,"WWW-Authenticate: %s%c%c",err_string,LF,LF);
}
if(header_only) break;
title_html(fd,"Authorization Required");
fprintf(fd,"Browser not authentication-capable or %c",LF);
fprintf(fd,"authentication failed.%c",LF);
break;
case BAD_REQUEST:
status = 400;
error_head(fd,"400 Bad Request");
if(header_only) break;
fprintf(fd,"Your client sent a query that this server could not%c",LF);
fprintf(fd,"understand.
%c",LF);
fprintf(fd,"Reason: %s
%c",err_string,LF);
break;
case FORBIDDEN:
status = 403;
error_head(fd,"403 Forbidden");
if(header_only) break;
fprintf(fd,"Your client does not have permission to get URL %s ",
err_string);
fprintf(fd,"from this server.
%c",LF);
break;
case NOT_FOUND:
status = 404;
error_head(fd,"404 Not Found");
if(header_only) break;
fprintf(fd,"The requested URL %s was not found on this server.
%c",
err_string,LF);
break;
case SERVER_ERROR:
status = 500;
error_head(fd,"500 Server Error");
log_error(err_string);
if(header_only)
break;
fprintf(fd,"The server encountered an internal error or%c",LF);
fprintf(fd,"misconfiguration and was unable to complete your%c",LF);
fprintf(fd,"request.
%c",LF);
fprintf(fd,"Please contact the server administrator,%c",LF);
fprintf(fd," %s ",server_admin);
fprintf(fd,"and inform them of the time the error occurred, and%c",LF);
fprintf(fd,"anything you might have done that may have caused%c",LF);
fprintf(fd,"the error.
%c",LF);
break;
case NOT_IMPLEMENTED:
status = 501;
error_head(fd,"501 Not Implemented");
if(header_only) break;
fprintf(fd,"We are sorry to be unable to perform the method %s",
err_string);
fprintf(fd," at this time.
%c",LF);
fprintf(fd,"If you would like to see this capability in future%c",LF);
fprintf(fd,"releases, send the method which failed, why you%c",LF);
fprintf(fd,"would like to have it, and the server version %s%c",
SERVER_VERSION,LF);
fprintf(fd,"to
%s%c",SERVER_SUPPORT,LF);
break;
case NO_MEMORY:
log_error("httpd: memory exhausted");
status = 500;
error_head(fd,"500 Server Error");
if(header_only) break;
fprintf(fd,"The server has temporarily run out of resources for%c",LF);
fprintf(fd,"your request. Please try again at a later time.
%c",LF);
break;
}
if(!header_only)
fprintf(fd,"%c",LF);
fflush(fd);
log_transaction();
htexit(1,fd);
}