- The libcurl FTP code now returns CURLE_REMOTE_FILE_NOT_FOUND error when SIZE

gets a 550 response back for the cases where a download (or NOBODY) is
  wanted. It still allows a 550 as response if the SIZE is used as part of an
  upload process (like if resuming an upload is requested and the file isn't
  there before the upload). I also modified the FTP test server and a few test
  cases accordingly to match this modified behavior.

CHANGES

@@ -6,6 +6,14 @@
 
                                   Changelog
 
+Daniel Stenberg (30 Sep 2008)
+- The libcurl FTP code now returns CURLE_REMOTE_FILE_NOT_FOUND error when SIZE
+  gets a 550 response back for the cases where a download (or NOBODY) is
+  wanted. It still allows a 550 as response if the SIZE is used as part of an
+  upload process (like if resuming an upload is requested and the file isn't
+  there before the upload). I also modified the FTP test server and a few test
+  cases accordingly to match this modified behavior.
+
 Daniel Stenberg (29 Sep 2008)
 - Daniel Egger provided a patch that allows you to disable proxy support in
   libcurl to somewhat reduce the size of the binary. Run configure

RELEASE-NOTES

@@ -31,6 +31,7 @@ This release includes the following bugfixes:
  o HTTP Digest with a blank realm did wrong
  o CURLINFO_REDIRECT_URL didn't work with the multi interface
  o CURLOPT_RANGE now works for SFTP downloads
+ o FTP SIZE response 550 now causes CURLE_REMOTE_FILE_NOT_FOUND
 
 This release includes the following known bugs:
 

lib/ftp.c

@@ -2188,6 +2188,10 @@ static CURLcode ftp_state_size_resp(struct connectdata *conn,
   curl_off_t filesize;
   char *buf = data->state.buffer;
 
+  if((instate != FTP_STOR_SIZE) && (ftpcode == 550))
+    /* the file doesn't exist and we're not about to upload */
+    return CURLE_REMOTE_FILE_NOT_FOUND;
+
   /* get the size from the ascii string: */
   filesize = (ftpcode == 213)?curlx_strtoofft(buf+4, NULL, 0):-1;
 
@@ -3165,6 +3169,7 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
   case CURLE_UPLOAD_FAILED:
   case CURLE_REMOTE_ACCESS_DENIED:
   case CURLE_FILESIZE_EXCEEDED:
+  case CURLE_REMOTE_FILE_NOT_FOUND:
     /* the connection stays alive fine even though this happened */
     /* fall-through */
   case CURLE_OK: /* doesn't affect the control connection's status */

tests/data/test118

@@ -9,6 +9,9 @@ FAILURE
 </info>
 # Server-side
 <reply>
+<size>
+1
+</size>
 <servercmd>
 REPLY RETR 314 bluah you f00l!
 REPLY EPSV 314 bluah you f00l!

tests/data/test533

@@ -45,10 +45,8 @@ CWD path
 EPSV
 TYPE I
 SIZE 533
-RETR 533
 EPSV
 SIZE 533
-RETR 533
 QUIT
 </protocol>
 </verify>

tests/data/test534

@@ -45,7 +45,6 @@ CWD path
 EPSV
 TYPE I
 SIZE 534
-RETR 534
 QUIT
 </protocol>
 </verify>

tests/data/test546

@@ -19,8 +19,6 @@ works
 </data>
 
 <servercmd>
-REPLY RETR 550 the file doesn't exist
-COUNT RETR 1
 REPLY SIZE 550 Can't check for file existence
 COUNT SIZE 1
 </servercmd>
@@ -52,7 +50,6 @@ CWD path
 EPSV
 TYPE I
 SIZE 546
-RETR 546
 EPSV
 SIZE 546
 RETR 546

tests/ftpserver.pl

@@ -389,12 +389,14 @@ sub SIZE_command {
 
     my $size = $data[0];
 
-    if($size) {
+    if($size ne "") {
+        # we check for "" to be able to explictly set the size to 0 and yet have
+        # that send a 213
         if($size > -1) {
             sendcontrol "213 $size\r\n";
         }
         else {
-            sendcontrol "550 $testno: No such file or directory.\r\n";
+            sendcontrol "350 $testno: SIZE is not supported.\r\n";
         }
     }
     else {
@@ -407,7 +409,7 @@ sub SIZE_command {
             sendcontrol "213 $size\r\n";
         }
         else {
-            sendcontrol "550 $testno: No such file or directory.\r\n";
+            sendcontrol "350 $testno: SIZE is not supported.\r\n";
         }
     }
     return 0;