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/*@@
@file Cookies.txt
@date Mon Sep 18 23:17:20 2000
@author Tom Goodale
@desc
Description of the Cookie interface.
@enddesc
@version $Header$
@@*/
There is an interface for setting and querying cookies, which is
accessed by including http_Cookies.h. This provides three functions
int HTTP_CookieSend(httpRequest *request,
const char *name,
const char *value,
const char *path,
const char *domain,
const char *expires,
int secure);
which will send a cookie with the appropriate name and value. All
other fields may be set to NULL, or 0 as appropriate.
int HTTP_CookieCancel(httpRequest *request,
const char *name,
const char *path);
which cancels a cookie by setting its value to "" and setting the
expiry date to the past.
These two functions produce header lines, so should go between the
HTTP response (e.g. HTTP/1.0 200 OK), and the "\r\n\r\n" seperating
the header from the body.
To get the value of a cookie, call
char *HTTP_CookieGet(httpRequest *request,
const char *name);
Note that the returned string must be freed afterwards.
Currently no encoding is done on the value field; this will be added
later. As a result things could go seriously wrong if you include a
';' or 'name=', where 'name' is a cookie name, in the value field.
Example:
--------
/* Status message */
strcpy(message,"HTTP/1.0 200 OK\r\n");
HTTP_Write(request, message, strlen(message));
/* Cookie */
HTTP_CookieSend(request, "user", "niceuser", NULL,NULL,NULL,0);
strcpy(message,"Content-Type: text/html\r\n\r\n");
HTTP_Write(request, message, strlen(message));
/* Start of body */
strcpy(message, "<HTML><HEAD><TITLE>Cookie Test</TITLE></HEAD>\n");
strcat(message, "<BODY><center><h1>Cookie Test</h1></center>");
HTTP_Write(request, message, strlen(message));
strcpy(message, "<center>");
HTTP_Write(request, message, strlen(message));
value2 = HTTP_CookieGet(request,"user");
sprintf(message, "<p>Cookie is '%s'</p>\n", value2);
free(value2);
...
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