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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <syslog.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "httpd.h"
/* ---------------------------------------------------------------------- */
static struct HTTP_STATUS {
int status;
char *head;
char *body;
} http[] = {
{ 200, "200 OK", NULL },
{ 400, "400 Bad Request", "*PLONK*\n" },
{ 404, "404 Not Found", "videotext page not found in cache\n" },
{ 408, "408 Request Timeout", "Request Timeout\n" },
{ 500, "500 Internal Server Error", "Sorry folks\n" },
{ 501, "501 Not Implemented", "Sorry folks\n" },
{ 0, NULL, NULL }
};
/* ---------------------------------------------------------------------- */
#define RESPONSE_START \
"HTTP/1.1 %s\r\n" \
"Server: %s\r\n" \
"Connection: %s\r\n"
#define RFCTIME \
"%a, %d %b %Y %H:%M:%S GMT"
#define BOUNDARY \
"XXX_CUT_HERE_%ld_XXX"
void
mkerror(struct REQUEST *req, int status, int ka)
{
int i;
for (i = 0; http[i].status != 0; i++)
if (http[i].status == status)
break;
req->status = status;
req->body = http[i].body;
req->lbody = strlen(req->body);
if (!ka)
req->keep_alive = 0;
req->lres = sprintf(req->hres,
RESPONSE_START
"Content-Type: text/plain\r\n"
"Content-Length: %d\r\n",
http[i].head,server_name,
req->keep_alive ? "Keep-Alive" : "Close",
req->lbody);
if (401 == status)
req->lres += sprintf(req->hres+req->lres,
"WWW-Authenticate: Basic, realm=\"webfs\"\r\n");
req->lres += strftime(req->hres+req->lres,80,
"Date: " RFCTIME "\r\n\r\n",
gmtime(&now));
req->state = STATE_WRITE_HEADER;
if (debug)
fprintf(stderr,"%03d: error: %d, connection=%s\n",
req->fd, status, req->keep_alive ? "Keep-Alive" : "Close");
}
void
mkredirect(struct REQUEST *req)
{
req->status = 302;
req->body = req->path;
req->lbody = strlen(req->body);
req->lres = sprintf(req->hres,
RESPONSE_START
"Location: http://%s:%d%s\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: %d\r\n",
"302 Redirect",server_name,
req->keep_alive ? "Keep-Alive" : "Close",
req->hostname,tcp_port,req->path,
req->lbody);
req->lres += strftime(req->hres+req->lres,80,
"Date: " RFCTIME "\r\n\r\n",
gmtime(&now));
req->state = STATE_WRITE_HEADER;
if (debug)
fprintf(stderr,"%03d: 302 redirect: %s, connection=%s\n",
req->fd, req->path, req->keep_alive ? "Keep-Alive" : "Close");
}
void
mkheader(struct REQUEST *req, int status, time_t mtime)
{
int i;
for (i = 0; http[i].status != 0; i++)
if (http[i].status == status)
break;
req->status = status;
req->lres = sprintf(req->hres,
RESPONSE_START,
http[i].head,server_name,
req->keep_alive ? "Keep-Alive" : "Close");
req->lres += sprintf(req->hres+req->lres,
"Content-Type: %s\r\n"
"Content-Length: %d\r\n",
req->mime,
req->lbody);
if (mtime != -1)
req->lres += strftime(req->hres+req->lres,80,
"Last-Modified: " RFCTIME "\r\n",
gmtime(&mtime));
req->lres += strftime(req->hres+req->lres,80,
"Date: " RFCTIME "\r\n\r\n",
gmtime(&now));
req->state = STATE_WRITE_HEADER;
if (debug)
fprintf(stderr,"%03d: %d, connection=%s\n",
req->fd, status, req->keep_alive ? "Keep-Alive" : "Close");
}
/* ---------------------------------------------------------------------- */
void write_request(struct REQUEST *req)
{
int rc;
for (;;) {
switch (req->state) {
case STATE_WRITE_HEADER:
rc = write(req->fd,req->hres + req->written,
req->lres - req->written);
switch (rc) {
case -1:
if (errno == EAGAIN)
return;
if (errno == EINTR)
continue;
xperror(LOG_INFO,"write",req->peerhost);
/* fall through */
case 0:
req->state = STATE_CLOSE;
return;
default:
req->written += rc;
req->bc += rc;
if (req->written != req->lres)
return;
}
req->written = 0;
if (req->head_only) {
req->state = STATE_FINISHED;
return;
} else {
req->state = STATE_WRITE_BODY;
}
break;
case STATE_WRITE_BODY:
rc = write(req->fd,req->body + req->written,
req->lbody - req->written);
switch (rc) {
case -1:
if (errno == EAGAIN)
return;
if (errno == EINTR)
continue;
xperror(LOG_INFO,"write",req->peerhost);
/* fall through */
case 0:
req->state = STATE_CLOSE;
return;
default:
req->written += rc;
req->bc += rc;
if (req->written != req->lbody)
return;
}
req->state = STATE_FINISHED;
return;
} /* switch(state) */
} /* for (;;) */
}
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