progress: Track total times following redirects

Update the progress timers `t_nslookup`, `t_connect`, `t_appconnect`,
`t_pretransfer`, and `t_starttransfer` to track the total times for
these activities when a redirect is followed. Previously, only the times
for the most recent request would be tracked.

Related changes:

  - Rename `Curl_pgrsResetTimesSizes` to `Curl_pgrsResetTransferSizes`
    now that the function only resets transfer sizes and no longer
    modifies any of the progress timers.

  - Add a bool to the `Progress` struct that is used to prevent
    double-counting `t_starttransfer` times.

Added test case 1399.

Fixes #522 and Known Bug 1.8
Closes #1602
Reported-by: joshhe on github

lib/getinfo.c

@@ -54,6 +54,7 @@ CURLcode Curl_initinfo(struct Curl_easy *data)
   pro->t_starttransfer = 0;
   pro->timespent = 0;
   pro->t_redirect = 0;
+  pro->is_t_startransfer_set = false;
 
   info->httpcode = 0;
   info->httpproxycode = 0;

lib/progress.c

@@ -149,14 +149,9 @@ int Curl_pgrsDone(struct connectdata *conn)
   return 0;
 }
 
-/* reset all times except redirect, and reset the known transfer sizes */
-void Curl_pgrsResetTimesSizes(struct Curl_easy *data)
+/* reset the known transfer sizes */
+void Curl_pgrsResetTransferSizes(struct Curl_easy *data)
 {
-  data->progress.t_nslookup = 0;
-  data->progress.t_connect = 0;
-  data->progress.t_pretransfer = 0;
-  data->progress.t_starttransfer = 0;
-
   Curl_pgrsSetDownloadSize(data, -1);
   Curl_pgrsSetUploadSize(data, -1);
 }
@@ -181,6 +176,7 @@ void Curl_pgrsTime(struct Curl_easy *data, timerid timer)
   case TIMER_STARTSINGLE:
     /* This is set at the start of each single fetch */
     data->progress.t_startsingle = now;
+    data->progress.is_t_startransfer_set = false;
     break;
   case TIMER_STARTACCEPT:
     data->progress.t_acceptdata = now;
@@ -205,10 +201,11 @@ void Curl_pgrsTime(struct Curl_easy *data, timerid timer)
      * This prevents repeated invocations of the function from incorrectly
      * changing the t_starttransfer time.
      */
-    if (*delta > data->progress.t_redirect) {
+    if(data->progress.is_t_startransfer_set) {
       return;
     }
     else {
+      data->progress.is_t_startransfer_set = true;
       break;
     }
   case TIMER_POSTRANSFER:
@@ -222,7 +219,7 @@ void Curl_pgrsTime(struct Curl_easy *data, timerid timer)
     time_t us = Curl_tvdiff_us(now, data->progress.t_startsingle);
     if(!us)
       us++; /* make sure at least one microsecond passed */
-    *delta = us;
+    *delta += us;
   }
 }
 
@@ -230,6 +227,7 @@ void Curl_pgrsStartNow(struct Curl_easy *data)
 {
   data->progress.speeder_c = 0; /* reset the progress meter display */
   data->progress.start = Curl_tvnow();
+  data->progress.is_t_startransfer_set = false;
   data->progress.ul_limit_start.tv_sec = 0;
   data->progress.ul_limit_start.tv_usec = 0;
   data->progress.dl_limit_start.tv_sec = 0;

lib/progress.h

@@ -47,7 +47,7 @@ void Curl_pgrsSetUploadSize(struct Curl_easy *data, curl_off_t size);
 void Curl_pgrsSetDownloadCounter(struct Curl_easy *data, curl_off_t size);
 void Curl_pgrsSetUploadCounter(struct Curl_easy *data, curl_off_t size);
 int Curl_pgrsUpdate(struct connectdata *);
-void Curl_pgrsResetTimesSizes(struct Curl_easy *data);
+void Curl_pgrsResetTransferSizes(struct Curl_easy *data);
 void Curl_pgrsTime(struct Curl_easy *data, timerid timer);
 long Curl_pgrsLimitWaitTime(curl_off_t cursize,
                             curl_off_t startsize,

lib/transfer.c

@@ -1345,7 +1345,7 @@ CURLcode Curl_pretransfer(struct Curl_easy *data)
 #endif
 
     Curl_initinfo(data); /* reset session-specific information "variables" */
-    Curl_pgrsResetTimesSizes(data);
+    Curl_pgrsResetTransferSizes(data);
     Curl_pgrsStartNow(data);
 
     if(data->set.timeout)
@@ -1883,7 +1883,7 @@ CURLcode Curl_follow(struct Curl_easy *data,
     break;
   }
   Curl_pgrsTime(data, TIMER_REDIRECT);
-  Curl_pgrsResetTimesSizes(data);
+  Curl_pgrsResetTransferSizes(data);
 
   return CURLE_OK;
 #endif /* CURL_DISABLE_HTTP */

lib/urldata.h

@@ -1259,6 +1259,8 @@ struct Progress {
   struct curltime t_startop;
   struct curltime t_acceptdata;
 
+  bool is_t_startransfer_set;
+
   /* upload speed limit */
   struct curltime ul_limit_start;
   curl_off_t ul_limit_size;