http: show the request as headers even when split-sending

When the initial request isn't possible to send in its entirety, the
remainder of request would be delivered to the debug callback as data
and would wrongly be counted internally as body-bytes sent.

Extended test 1295 to verify.

Closes #6328

lib/http.c

@@ -1294,6 +1294,9 @@ CURLcode Curl_buffer_send(struct dynbuf *in,
         http->postdata = ptr;
         http->postsize = (curl_off_t)size;
 
+        /* this much data is remaining header: */
+        data->req.pendingheader = headersize - headlen;
+
         http->send_buffer = *in; /* copy the whole struct */
         http->sending = HTTPSEND_REQUEST;
 
@@ -1316,6 +1319,8 @@ CURLcode Curl_buffer_send(struct dynbuf *in,
   }
   Curl_dyn_free(in);
 
+  /* no remaining header data */
+  data->req.pendingheader = 0;
   return result;
 }
 

lib/transfer.c

@@ -1016,6 +1016,8 @@ static CURLcode readwrite_upload(struct Curl_easy *data,
   *didwhat |= KEEP_SEND;
 
   do {
+    curl_off_t nbody;
+
     /* only read more data if there's no upload data already
        present in the upload buffer */
     if(0 == k->upload_present) {
@@ -1153,12 +1155,26 @@ static CURLcode readwrite_upload(struct Curl_easy *data,
 
     win_update_buffer_size(conn->writesockfd);
 
-    /* show the data before we change the pointer upload_fromhere */
-    Curl_debug(data, CURLINFO_DATA_OUT, k->upload_fromhere,
-               (size_t)bytes_written);
+    if(k->pendingheader) {
+      /* parts of what was sent was header */
+      curl_off_t n = CURLMIN(k->pendingheader, bytes_written);
+      /* show the data before we change the pointer upload_fromhere */
+      Curl_debug(data, CURLINFO_HEADER_OUT, k->upload_fromhere, (size_t)n);
+      k->pendingheader -= n;
+      nbody = bytes_written - n; /* size of the written body part */
+    }
+    else
+      nbody = bytes_written;
 
-    k->writebytecount += bytes_written;
-    Curl_pgrsSetUploadCounter(data, k->writebytecount);
+    if(nbody) {
+      /* show the data before we change the pointer upload_fromhere */
+      Curl_debug(data, CURLINFO_DATA_OUT,
+                 &k->upload_fromhere[bytes_written - nbody],
+                 (size_t)nbody);
+
+      k->writebytecount += nbody;
+      Curl_pgrsSetUploadCounter(data, k->writebytecount);
+    }
 
     if((!k->upload_chunky || k->forbidchunk) &&
        (k->writebytecount == data->state.infilesize)) {

lib/urldata.h

@@ -604,6 +604,8 @@ struct SingleRequest {
                                    following second response code) result in a
                                    CURLE_GOT_NOTHING error code */
 
+  curl_off_t pendingheader;      /* this many bytes left to send is actually
+                                    header and not body */
   struct curltime start;         /* transfer started at this time */
   struct curltime now;           /* current time */
   enum {

tests/data/test1295

@@ -9,7 +9,7 @@ HTTP POST
 #
 # Server-side
 <reply>
-<data>
+<data nocheck="yes">
 HTTP/1.1 200 OK
 Date: Thu, 09 Nov 2010 14:49:00 GMT
 Server: test-server/fake
@@ -44,7 +44,7 @@ HTTP POST with split initial request send
 CURL_SMALLREQSEND=100
 </setenv>
 <command>
-http://%HOSTIP:%HTTPPORT/012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679/1295 -H "012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679: 300" -d "Mr. Sherlock Holmes, who was usually very late in the mornings, save upon those not infrequent occasions when he was up all night, was seated at the breakfast table."
+http://%HOSTIP:%HTTPPORT/012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679/1295 -H "012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679: 300" -d "Mr. Sherlock Holmes, who was usually very late in the mornings, save upon those not infrequent occasions when he was up all night, was seated at the breakfast table." -w '%{size_upload}\n'
 </command>
 </client>
 
@@ -62,5 +62,20 @@ Content-Type: application/x-www-form-urlencoded
 
 Mr. Sherlock Holmes, who was usually very late in the mornings, save upon those not infrequent occasions when he was up all night, was seated at the breakfast table.
 </protocol>
+<stdout>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Last-Modified: Tue, 13 Jun 2000 12:10:00 GMT
+ETag: "21025-dc7-39462498"
+Accept-Ranges: bytes
+Content-Length: 6
+Connection: close
+Content-Type: text/html
+Funny-head: yesyes
+
+-foo-
+165
+</stdout>
 </verify>
 </testcase>