support for ingoring session cookies added

lib/cookie.c

@@ -93,6 +93,21 @@ Example set of cookies:
 #include "memdebug.h"
 #endif
 
+static void
+free_cookiemess(struct Cookie *co)
+{
+  if(co->domain)
+    free(co->domain);
+  if(co->path)
+    free(co->path);
+  if(co->name)
+    free(co->name);
+  if(co->value)
+    free(co->value);
+
+  free(co);
+}
+
 /****************************************************************************
  *
  * Curl_cookie_add()
@@ -326,22 +341,19 @@ Curl_cookie_add(struct CookieInfo *c,
     if(7 != fields) {
       /* we did not find the sufficient number of fields to recognize this
          as a valid line, abort and go home */
-
-      if(co->domain)
-        free(co->domain);
-      if(co->path)
-        free(co->path);
-      if(co->name)
-        free(co->name);
-      if(co->value)
-        free(co->value);
-
-      free(co);
+      free_cookiemess(co);
       return NULL;
     }
 
   }
 
+  if(!c->running &&    /* read from a file */
+     c->newsession &&  /* clean session cookies */
+     !co->expires) {   /* this is a session cookie since it doesn't expire! */
+    free_cookiemess(co);
+    return NULL;
+  }
+
   co->livecookie = c->running;
 
   /* now, we have parsed the incoming line, we must now check if this
@@ -462,8 +474,12 @@ Curl_cookie_add(struct CookieInfo *c,
  * Inits a cookie struct to read data from a local file. This is always
  * called before any cookies are set. File may be NULL.
  *
+ * If 'newsession' is TRUE, discard all "session cookies" on read from file.
+ *
  ****************************************************************************/
-struct CookieInfo *Curl_cookie_init(char *file, struct CookieInfo *inc)
+struct CookieInfo *Curl_cookie_init(char *file,
+                                    struct CookieInfo *inc,
+                                    bool newsession)
 {
   char line[MAX_COOKIE_LINE];
   struct CookieInfo *c;
@@ -491,6 +507,8 @@ struct CookieInfo *Curl_cookie_init(char *file, struct CookieInfo *inc)
   else
     fp = file?fopen(file, "r"):NULL;
 
+  c->newsession = newsession; /* new session? */
+
   if(fp) {
     char *lineptr;
     bool headerline;
@@ -513,7 +531,7 @@ struct CookieInfo *Curl_cookie_init(char *file, struct CookieInfo *inc)
       fclose(fp);
   }
 
-  c->running = TRUE; /* now, we're running */
+  c->running = TRUE;          /* now, we're running */
 
   return c;
 }

lib/cookie.h

@@ -55,9 +55,10 @@ struct CookieInfo {
   /* linked list of cookies we know of */
   struct Cookie *cookies;
 
-  char *filename; /* file we read from/write to */
-  bool running;   /* state info, for cookie adding information */
+  char *filename;  /* file we read from/write to */
+  bool running;    /* state info, for cookie adding information */
   long numcookies; /* number of cookies in the "jar" */
+  bool newsession; /* new session, discard session cookies on load */
 };
 
 /* This is the maximum line length we accept for a cookie line */
@@ -75,7 +76,7 @@ struct CookieInfo {
 struct Cookie *Curl_cookie_add(struct CookieInfo *, bool header, char *line,
                                char *domain);
 
-struct CookieInfo *Curl_cookie_init(char *, struct CookieInfo *);
+struct CookieInfo *Curl_cookie_init(char *, struct CookieInfo *, bool);
 struct Cookie *Curl_cookie_getlist(struct CookieInfo *, char *, char *, bool);
 void Curl_cookie_freelist(struct Cookie *);
 void Curl_cookie_cleanup(struct CookieInfo *);

lib/easy.c

@@ -312,7 +312,8 @@ CURL *curl_easy_duphandle(CURL *incurl)
     /* If cookies are enabled in the parent handle, we enable them
        in the clone as well! */
     outcurl->cookies = Curl_cookie_init(data->cookies->filename,
-                                        outcurl->cookies);
+                                        outcurl->cookies,
+                                        data->set.cookiesession);
 
   /* duplicate all values in 'change' */
   if(data->change.url) {

lib/url.c

@@ -495,13 +495,33 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option, ...)
     data->set.ssl.version = va_arg(param, long);
     break;
 
+  case CURLOPT_COOKIESESSION:
+    /*
+     * Set this option to TRUE to start a new "cookie session". It will
+     * prevent the forthcoming read-cookies-from-file actions to accept
+     * cookies that are marked as being session cookies, as they belong to a
+     * previous session.
+     *
+     * In the original Netscape cookie spec, "session cookies" are cookies
+     * with no expire date set. RFC2109 describes the same action if no
+     * 'Max-Age' is set and RFC2965 includes the RFC2109 description and adds
+     * a 'Discard' action that can enforce the discard even for cookies that
+     * have a Max-Age.
+     *
+     * We run mostly with the original cookie spec, as hardly anyone implements
+     * anything else.
+     */
+    data->set.cookiesession = (bool)va_arg(param, long);
+    break;
+
   case CURLOPT_COOKIEFILE:
     /*
      * Set cookie file to read and parse. Can be used multiple times.
      */
     cookiefile = (char *)va_arg(param, void *);
     if(cookiefile)
-      data->cookies = Curl_cookie_init(cookiefile, data->cookies);
+      data->cookies = Curl_cookie_init(cookiefile, data->cookies,
+                                       data->set.cookiesession);
     break;
 
   case CURLOPT_COOKIEJAR:
@@ -514,7 +534,8 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option, ...)
      * Activate the cookie parser. This may or may not already
      * have been made.
      */
-    data->cookies = Curl_cookie_init(NULL, data->cookies);
+    data->cookies = Curl_cookie_init(NULL, data->cookies,
+                                     data->set.cookiesession);
     break;
   case CURLOPT_WRITEHEADER:
     /*

lib/urldata.h

@@ -607,6 +607,7 @@ struct UserDefined {
   char *key_passwd;     /* plain text private key password */
   char *crypto_engine;  /* name of the crypto engine to use */
   char *cookiejar;      /* dump all cookies to this file */
+  bool cookiesession;   /* new cookie session? */
   bool crlf;            /* convert crlf on ftp upload(?) */
   struct curl_slist *quote;     /* after connection is established */
   struct curl_slist *postquote; /* after the transfer */