Using the multi interface, and doing a requsted a re-used connection that

gets closed just after the request has been sent failed and did not re-issue
a request on a fresh reconnect like the easy interface did. Now it does!
(define CURL_MULTIEASY, run test case 160)

CHANGES

@@ -7,6 +7,17 @@
                                   Changelog
 
 Daniel (29 January 2005)
+- Using the multi interface, and doing a requsted a re-used connection that
+  gets closed just after the request has been sent failed and did not re-issue
+  a request on a fresh reconnect like the easy interface did. Now it does!
+
+- Define CURL_MULTIEASY when building libcurl (lib/easy.c to be exact), to use
+  my new curl_easy_perform() that uses the multi interface to run the
+  request. It is a great testbed for the multi interface and I believe we
+  shall do it this way for real in the future when we have a successor to
+  curl_multi_fdset(). I've used this approach to detect and fix several of the
+  recent multi-interfaces issues.
+
 - Adjusted the KNOWN_BUGS #17 fix a bit more since the FTP code also did some
   bad assumptions.
 

lib/multi.c

@@ -506,19 +506,24 @@ CURLMcode curl_multi_perform(CURLM *multi_handle, int *running_handles)
           Curl_done(&easy->easy_conn, easy->result);
         }
 
-        /* after the transfer is done, go DONE */
         else if(TRUE == done) {
+          char *newurl;
+          bool retry = Curl_retry_request(easy->easy_conn, &newurl);
 
           /* call this even if the readwrite function returned error */
           Curl_posttransfer(easy->easy_handle);
 
           /* When we follow redirects, must to go back to the CONNECT state */
-          if(easy->easy_conn->newurl) {
-            char *newurl = easy->easy_conn->newurl;
-            easy->easy_conn->newurl = NULL;
+          if(easy->easy_conn->newurl || retry) {
+            if(!retry) {
+              /* if the URL is a follow-location and not just a retried request
+                 then figure out the URL here */
+              newurl = easy->easy_conn->newurl;
+              easy->easy_conn->newurl = NULL;
+            }
             easy->result = Curl_done(&easy->easy_conn, CURLE_OK);
             if(easy->result == CURLE_OK)
-              easy->result = Curl_follow(easy->easy_handle, newurl, FALSE);
+              easy->result = Curl_follow(easy->easy_handle, newurl, retry);
             if(CURLE_OK == easy->result) {
               easy->state = CURLM_STATE_CONNECT;
               result = CURLM_CALL_MULTI_PERFORM;
@@ -529,6 +534,7 @@ CURLMcode curl_multi_perform(CURLM *multi_handle, int *running_handles)
               free(newurl);
           }
           else {
+            /* after the transfer is done, go DONE */
             easy->state = CURLM_STATE_DONE;
             result = CURLM_CALL_MULTI_PERFORM;
           }

lib/transfer.c

@@ -2060,7 +2060,32 @@ Curl_connect_host(struct SessionHandle *data,
   return res;
 }
 
+/* Returns TRUE and sets '*url' if a request retry is wanted */
+bool Curl_retry_request(struct connectdata *conn,
+                        char **url)
+{
+  bool retry = FALSE;
 
+  if((conn->keep.bytecount+conn->headerbytecount == 0) &&
+     conn->bits.reuse) {
+    /* We got no data and we attempted to re-use a connection. This might
+       happen if the connection was left alive when we were done using it
+       before, but that was closed when we wanted to read from it again. Bad
+       luck. Retry the same request on a fresh connect! */
+    infof(conn->data, "Connection died, retrying a fresh connect\n");
+    *url = strdup(conn->data->change.url);
+
+    conn->bits.close = TRUE; /* close this connection */
+    conn->bits.retry = TRUE; /* mark this as a connection we're about
+                                to retry. Marking it this way should
+                                prevent i.e HTTP transfers to return
+                                error just because nothing has been
+                                transfered! */
+    retry = TRUE;
+  }
+
+  return retry;
+}
 
 /*
  * Curl_perform() is the internal high-level function that gets called by the
@@ -2106,31 +2131,12 @@ CURLcode Curl_perform(struct SessionHandle *data)
       if(res == CURLE_OK && !data->set.source_url) {
         res = Transfer(conn); /* now fetch that URL please */
         if(res == CURLE_OK) {
+          retry = Curl_retry_request(conn, &newurl);
 
-          retry = FALSE;
-
-          if((conn->keep.bytecount+conn->headerbytecount == 0) &&
-             conn->bits.reuse) {
-            /* We got no data and we attempted to re-use a connection. This
-               might happen if the connection was left alive when we were done
-               using it before, but that was closed when we wanted to read
-               from it again. Bad luck. Retry the same request on a fresh
-               connect! */
-            infof(data, "Connection died, retrying a fresh connect\n");
-            newurl = strdup(conn->data->change.url);
-
-            conn->bits.close = TRUE; /* close this connection */
-            conn->bits.retry = TRUE; /* mark this as a connection we're about
-                                        to retry. Marking it this way should
-                                        prevent i.e HTTP transfers to return
-                                        error just because nothing has been
-                                        transfered! */
-            retry = TRUE;
-          }
-          else
+          if(!retry)
             /*
-             * We must duplicate the new URL here as the connection data
-             * may be free()ed in the Curl_done() function.
+             * We must duplicate the new URL here as the connection data may
+             * be free()ed in the Curl_done() function.
              */
             newurl = conn->newurl?strdup(conn->newurl):NULL;
         }

lib/transfer.h

@@ -36,7 +36,7 @@ void Curl_single_fdset(struct connectdata *conn,
 CURLcode Curl_readwrite_init(struct connectdata *conn);
 CURLcode Curl_readrewind(struct connectdata *conn);
 CURLcode Curl_fillreadbuffer(struct connectdata *conn, int bytes, int *nreadp);
-
+bool Curl_retry_request(struct connectdata *conn, char **url);
 /* This sets up a forthcoming transfer */
 CURLcode
 Curl_Transfer (struct connectdata *data,