Tomas Pospisek filed bug report #1053287 that proved -C - and --fail on a

file that was already completely downloaded caused an error, while it
doesn't if you don't use --fail! I added test case 194 to verify the fix.
Grrr. CURLOPT_FAILONERROR is now added to the list stuff to remove in
libcurl v8 due to all the kludges needed to support it.

CHANGES

@@ -7,6 +7,12 @@
                                   Changelog
 
 Daniel (25 October 2004)
+- Tomas Pospisek filed bug report #1053287 that proved -C - and --fail on a
+  file that was already completely downloaded caused an error, while it
+  doesn't if you don't use --fail! I added test case 194 to verify the fix.
+  Grrr. CURLOPT_FAILONERROR is now added to the list stuff to remove in
+  libcurl v8 due to all the kludges needed to support it.
+
 - Mohun Biswas found out that formposting a zero-byte file didn't work very
   good. I fixed.
 

docs/TODO

@@ -250,3 +250,6 @@ TODO
 
    They will instead become curlx_ - alternatives. That makes the curl app
    still capable of building with them from source.
+
+ * Remove support for CURLOPT_FAILONERROR, it has gotten too kludgy and weird
+   internally. Let the app judge success or not for itself.

lib/http.c

@@ -553,6 +553,14 @@ int Curl_http_should_fail(struct connectdata *conn)
   if (k->httpcode < 400)
     return 0;
 
+  if (conn->resume_from &&
+      (data->set.httpreq==HTTPREQ_GET) &&
+      (k->httpcode == 416)) {
+    /* "Requested Range Not Satisfiable", just proceed and
+       pretend this is no error */
+    return 0;
+  }
+
   /*
   ** Any code >= 400 that's not 401 or 407 is always
   ** a terminal error

lib/transfer.c

@@ -487,7 +487,6 @@ CURLcode Curl_readwrite(struct connectdata *conn,
                 (100 == k->httpcode)?conn->headerbytecount:0;
 
               if (conn->resume_from &&
-                  !k->content_range &&
                   (data->set.httpreq==HTTPREQ_GET) &&
                   (k->httpcode == 416)) {
                 /* "Requested Range Not Satisfiable" */
@@ -613,10 +612,19 @@ CURLcode Curl_readwrite(struct connectdata *conn,
                     (k->httpcode >= 400) &&
                     (k->httpcode != 401) &&
                     (k->httpcode != 407)) {
-                  /* serious error, go home! */
-                  failf (data, "The requested URL returned error: %d",
-                         k->httpcode);
-                  return CURLE_HTTP_RETURNED_ERROR;
+
+                  if (conn->resume_from &&
+                      (data->set.httpreq==HTTPREQ_GET) &&
+                      (k->httpcode == 416)) {
+                    /* "Requested Range Not Satisfiable", just proceed and
+                       pretend this is no error */
+                  }
+                  else {
+                    /* serious error, go home! */
+                    failf (data, "The requested URL returned error: %d",
+                           k->httpcode);
+                    return CURLE_HTTP_RETURNED_ERROR;
+                  }
                 }
 
                 if(k->httpversion == 10)
@@ -954,8 +962,8 @@ CURLcode Curl_readwrite(struct connectdata *conn,
                 /* we wanted to resume a download, although the server doesn't
                  * seem to support this and we did this with a GET (if it
                  * wasn't a GET we did a POST or PUT resume) */
-                failf (data, "HTTP server doesn't seem to support "
-                       "byte ranges. Cannot resume.");
+                failf(data, "HTTP server doesn't seem to support "
+                      "byte ranges. Cannot resume.");
                 return CURLE_HTTP_RANGE_ERROR;
               }
 

tests/data/Makefile.am

@@ -27,7 +27,7 @@ EXTRA_DIST = test1 test108 test117 test127 test20 test27 test34 test46	\
  test172 test204 test205 test173 test174 test175 test176 test177	\
  test513 test514 test178 test179 test180 test181 test182 test183	\
  test184 test185 test186 test187 test188 test189 test191 test192	\
- test193
+ test193 test194
 
 # The following tests have been removed from the dist since they no longer
 # work. We need to fix the test suite's FTPS server first, then bring them

tests/data/test194

@@ -0,0 +1,46 @@
+# Server-side
+<reply>
+<data>
+HTTP/1.1 416 Requested Range Not Satisfiable swsclose
+Date: Fri, 24 Oct 2003 21:33:12 GMT
+Server: Apache/1.3.19 (Unix)  (Red-Hat/Linux) mod_ssl/2.8.1 OpenSSL/0.9.6 PHP/4.3.1
+Last-Modified: Fri, 24 Oct 2003 18:01:23 GMT
+ETag: "ab57a-507-3f9968f3"
+Accept-Ranges: bytes
+Content-Length: 87
+Content-Range: bytes */87
+Content-Type: image/gif
+Connection: close
+
+</data>
+
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP resume transfer with the whole file already downloaded and --fail
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/want/194 -C 87 --fail
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /want/194 HTTP/1.1
+Range: bytes=87-
+Host: 127.0.0.1:%HTTPPORT
+Pragma: no-cache
+Accept: */*
+
+</protocol>
+
+</verify>