Allen Pulsifer provided a patch that makes libcurl set the expected download

size earlier when doing HTTP downloads, so that applications and the
progress meter etc know get the info earlier in the flow than before.

CHANGES

@@ -7,6 +7,10 @@
                                   Changelog
 
 Daniel S (11 August 2007)
+- Allen Pulsifer provided a patch that makes libcurl set the expected download
+  size earlier when doing HTTP downloads, so that applications and the
+  progress meter etc know get the info earlier in the flow than before.
+
 - Patrick Monnerat modified the LDAP code and approach in curl. Starting now,
   the configure script checks for openldap and friends and we link with those
   libs just like we link all other third party libraries, and we no longer

RELEASE-NOTES

@@ -15,6 +15,7 @@ This release includes the following changes:
  o curl_easy_setopt() now allocates strings passed to it
  o SCP and SFTP support now requires libssh2 0.16 or later
  o LDAP libraries are now linked "regularly" and not with dlopen
+ o HTTP transfers have the download size info "available" earlier
 
 This release includes the following bugfixes:
 
@@ -60,6 +61,6 @@ advice from friends like these:
  Daniel Cater, Colin Hogben, Jofell Gallardo, Daniel Johnson,
  Ralf S. Engelschall, James Housley, Chris Flerackers, Patrick Monnerat,
  Jayesh A Shah, Greg Zavertnik, Peter O'Gorman, Greg Morse, Dmitriy Sergeyev,
- Scott Cantor
+ Scott Cantor, Allen Pulsifer
  
         Thanks! (and sorry if I forgot to mention someone)

lib/transfer.c

@@ -869,6 +869,10 @@ CURLcode Curl_readwrite(struct connectdata *conn,
               if(contentlength >= 0) {
                 k->size = contentlength;
                 k->maxdownload = k->size;
+                /* we set the progress download size already at this point
+                   just to make it easier for apps/callbacks to extract this
+                   info as soon as possible */
+                Curl_pgrsSetDownloadSize(data, k->size);
               }
               else {
                 /* Negative Content-Length is really odd, and we know it