transfer: make Expect: 100-continue timeout configurable.

Replaced the #define CURL_TIMEOUT_EXPECT_100 in transfer.c with the
CURLOPT_EXPECT_100_TIMEOUT_MS option to make the timeout configurable.

3 files changed, 15 insertions, 5 deletions

diff --git a/lib/transfer.c b/lib/transfer.c
index f996b0ee5..83727db68 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -87,8 +87,6 @@
 /* The last #include file should be: */
 #include "memdebug.h"
 
-#define CURL_TIMEOUT_EXPECT_100 1000 /* counting ms here */
-
 /*
  * This function will call the read callback to fill our buffer with data
  * to upload.
@@ -839,7 +837,7 @@ static CURLcode readwrite_upload(struct SessionHandle *data,
           *didwhat &= ~KEEP_SEND;  /* we didn't write anything actually */
 
           /* set a timeout for the multi interface */
-          Curl_expire(data, CURL_TIMEOUT_EXPECT_100);
+          Curl_expire(data, data->set.expect_100_timeout);
           break;
         }
 
@@ -1075,7 +1073,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
       */
 
       long ms = Curl_tvdiff(k->now, k->start100);
-      if(ms >= CURL_TIMEOUT_EXPECT_100) {
+      if(ms >= data->set.expect_100_timeout) {
         /* we've waited long enough, continue anyway */
         k->exp100 = EXP100_SEND_DATA;
         k->keepon |= KEEP_SEND;
@@ -1969,7 +1967,7 @@ Curl_setup_transfer(
 
         /* Set a timeout for the multi interface. Add the inaccuracy margin so
            that we don't fire slightly too early and get denied to run. */
-        Curl_expire(data, CURL_TIMEOUT_EXPECT_100);
+        Curl_expire(data, data->set.expect_100_timeout);
       }
       else {
         if(data->state.expect100header)
diff --git a/lib/url.c b/lib/url.c
index 3f2112d8a..5020a2bdf 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -565,6 +565,8 @@ CURLcode Curl_init_userdefined(struct UserDefined *set)
 
   set->ssl_enable_npn = TRUE;
   set->ssl_enable_alpn = TRUE;
+
+  set->expect_100_timeout = 1000L; /* Wait for a second by default. */
   return res;
 }
 
@@ -1256,6 +1258,14 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
   }
   break;
 
+  case CURLOPT_EXPECT_100_TIMEOUT_MS:
+    /*
+     * Time to wait for a response to a HTTP request containing an
+     * Expect: 100-continue header before sending the data anyway.
+     */
+    data->set.expect_100_timeout = va_arg(param, long);
+    break;
+
 #endif   /* CURL_DISABLE_HTTP */
 
   case CURLOPT_CUSTOMREQUEST:
diff --git a/lib/urldata.h b/lib/urldata.h
index 188e766ea..1ab7b94e9 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1596,6 +1596,8 @@ struct UserDefined {
 
   bool ssl_enable_npn;  /* TLS NPN extension? */
   bool ssl_enable_alpn; /* TLS ALPN extension? */
+
+  long expect_100_timeout; /* in milliseconds */
 };
 
 struct Names {