commands/httpd0995/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  * 05/14/2006                   Michael Temari <Michael@TemWare.Com>
   9  *
  10  */
  11 #include <sys/types.h>
  12 #include <sys/stat.h>
  13 #include <ctype.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <time.h>
  18 #include <fcntl.h>
  19 #include <unistd.h>
  20 #include <errno.h>
  21
  22 #include "config.h"
  23 #include "http.h"
  24 #include "utility.h"
  25
  26 int processrequest(rq, rp)
  27 struct http_request *rq;
  28 struct http_reply *rp;
  29 {
  30    /* clear out http_reply */
  31    memset(rp, 0, sizeof(*rp));
  32    rp->status = HTTP_STATUS_OK;
  33    strcpy(rp->statusmsg, "OK");
  34    rp->modtime = (time_t) -1;
  35    rp->urlaccess = -1;
  36    rp->size = 0;
  37    rp->fd = -1;
  38    rp->ofd = -1;
  39    rp->pid = 0;
  40
  41    if(Redirect != NULL) {
  42         rp->status = HTTP_STATUS_MOVED_PERM;
  43         strcpy(rp->realurl, Redirect);
  44         strcat(rp->realurl, rq->uri);
  45         strcpy(rq->url, rp->realurl);
  46         return(0);
  47    }
  48
  49    /* Simple requests can only be a GET */
  50    if(rq->type == HTTP_REQUEST_TYPE_SIMPLE && rq->method != HTTP_METHOD_GET) {
  51         rp->status = HTTP_STATUS_BAD_REQUEST;
  52         strcpy(rp->statusmsg, "Bad request");
  53         return(0);
  54    }
  55
  56    /* I don't know this method */
  57    if(rq->method == HTTP_METHOD_UNKNOWN) {
  58         rp->status = HTTP_STATUS_NOT_IMPLEMENTED;
  59         strcpy(rp->statusmsg, "Method not implemented");
  60         return(0);
  61    }
  62
  63    /* Check for access and real location of url */
  64    if(police(rq, rp))
  65         return(-1);
  66
  67    /* We're done if there was an error accessing the url */
  68    if(rp->status != HTTP_STATUS_OK)
  69         return(0);
  70
  71    /* Check to see if we have a newer version for them */
  72    if(rq->method == HTTP_METHOD_GET)
  73         if(rq->ifmodsince != (time_t) -1)
  74                 if(rq->ifmodsince < time((time_t *)NULL))
  75                         if(rp->modtime != (time_t) -1 && rp->modtime <= rq->ifmodsince) {
  76                                 rp->status = HTTP_STATUS_NOT_MODIFIED;
  77                                 strcpy(rp->statusmsg, "Not modified");
  78                                 close(rp->fd);
  79                                 rp->fd = -1;
  80                                 return(0);
  81                         }
  82
  83    rp->status = HTTP_STATUS_OK;
  84    strcpy(rp->statusmsg, "OK");
  85
  86    if(rp->size != 0)
  87         rp->keepopen = rq->keepopen;
  88
  89    return(0);
  90 }