commands/httpd/process.c

   1 /* process.c
   2  *
   3  * This file is part of httpd.
   4  *
   5  * 02/17/1996                   Michael Temari <Michael@TemWare.Com>
   6  * 07/07/1996 Initial Relase    Michael Temari <Michael@TemWare.Com>
   7  * 12/29/2002                   Michael Temari <Michael@TemWare.Com>
   8  *
   9  */
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12 #include <ctype.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <time.h>
  17 #include <fcntl.h>
  18 #include <unistd.h>
  19 #include <errno.h>
  20
  21 #include "config.h"
  22 #include "http.h"
  23 #include "utility.h"
  24
  25 int processrequest(rq, rp)
  26 struct http_request *rq;
  27 struct http_reply *rp;
  28 {
  29    /* clear out http_reply */
  30    memset(rp, 0, sizeof(*rp));
  31    rp->status = HTTP_STATUS_OK;
  32    strcpy(rp->statusmsg, "OK");
  33    rp->modtime = (time_t) -1;
  34    rp->urlaccess = -1;
  35    rp->size = 0;
  36    rp->fd = -1;
  37    rp->ofd = -1;
  38    rp->pid = 0;
  39
  40    /* Simple requests can only be a GET */
  41    if(rq->type == HTTP_REQUEST_TYPE_SIMPLE && rq->method != HTTP_METHOD_GET) {
  42         rp->status = HTTP_STATUS_BAD_REQUEST;
  43         strcpy(rp->statusmsg, "Bad request");
  44         return(0);
  45    }
  46
  47    /* I don't know this method */
  48    if(rq->method == HTTP_METHOD_UNKNOWN) {
  49         rp->status = HTTP_STATUS_NOT_IMPLEMENTED;
  50         strcpy(rp->statusmsg, "Method not implemented");
  51         return(0);
  52    }
  53
  54    /* Check for access and real location of url */
  55    if(police(rq, rp))
  56         return(-1);
  57
  58    /* We're done if there was an error accessing the url */
  59    if(rp->status != HTTP_STATUS_OK)
  60         return(0);
  61
  62    /* Check to see if we have a newer version for them */
  63    if(rq->method == HTTP_METHOD_GET)
  64         if(rq->ifmodsince != (time_t) -1)
  65                 if(rq->ifmodsince < time((time_t *)NULL))
  66                         if(rp->modtime != (time_t) -1 && rp->modtime <= rq->ifmodsince) {
  67                                 rp->status = HTTP_STATUS_NOT_MODIFIED;
  68                                 strcpy(rp->statusmsg, "Not modified");
  69                                 close(rp->fd);
  70                                 rp->fd = -1;
  71                                 return(0);
  72                         }
  73
  74    rp->status = HTTP_STATUS_OK;
  75    strcpy(rp->statusmsg, "OK");
  76
  77    if(rp->size != 0)
  78         rp->keepopen = rq->keepopen;
  79
  80    return(0);
  81 }