curl --expect100-timeout: added

This is the new command line option to set the value for the existing
libcurl option CURLOPT_EXPECT_100_TIMEOUT_MS

docs/curl.1

@@ -523,6 +523,13 @@ after having run curl.
 (SSL) Specify the path name to the Entropy Gathering Daemon socket. The socket
 is used to seed the random engine for SSL connections. See also the
 \fI--random-file\fP option.
+.IP "--expect100-timeout <seconds>"
+(HTTP) Maximum time in seconds that you allow curl to wait for a 100-continue
+response when curl emits an Expects: 100-continue header in its request. By
+default curl will wait one second. This option accepts decimal values! When
+curl stops waiting, it will continue as if the response has been received.
+
+(Added in 7.47.0)
 .IP "--cert-type <type>"
 (SSL) Tells curl what certificate type the provided certificate is in. PEM,
 DER and ENG are recognized types.  If not specified, PEM is assumed.

src/tool_cfgable.h

@@ -214,6 +214,7 @@ struct OperationConfig {
   char *unix_socket_path;         /* path to Unix domain socket */
   bool falsestart;
   bool path_as_is;
+  double expect100timeout;
   struct GlobalConfig *global;
   struct OperationConfig *prev;
   struct OperationConfig *next;   /* Always last in the struct */

src/tool_getparam.c

@@ -179,6 +179,7 @@ static const struct LongShort aliases[]= {
   {"$O", "proxy-service-name",       TRUE},
   {"$P", "service-name",             TRUE},
   {"$Q", "proto-default",            TRUE},
+  {"$R", "expect100-timeout",        TRUE},
   {"0",   "http1.0",                 FALSE},
   {"01",  "http1.1",                 FALSE},
   {"02",  "http2",                   FALSE},
@@ -999,6 +1000,11 @@ ParameterError getparameter(char *flag,    /* f or -long-flag */
         if(err)
           return err;
         break;
+      case 'R': /* --expect100-timeout */
+        err = str2udouble(&config->expect100timeout, nextarg);
+        if(err)
+          return err;
+        break;
       }
       break;
     case '#': /* --progress-bar */

src/tool_help.c

@@ -83,6 +83,7 @@ static const char *const helptext[] = {
 #ifdef USE_ENVIRONMENT
   "     --environment   Write results to environment variables (RISC OS)",
 #endif
+  "     --expect100-timeout SECONDS How long to wait for 100-continue (H)",
   " -f, --fail          Fail silently (no output at all) on HTTP errors (H)",
   "     --false-start   Enable TLS False Start.",
   " -F, --form CONTENT  Specify HTTP multipart POST data (H)",

src/tool_operate.c

@@ -1358,6 +1358,11 @@ static CURLcode operate_do(struct GlobalConfig *global,
         if(config->proto_default)
           my_setopt_str(curl, CURLOPT_DEFAULT_PROTOCOL, config->proto_default);
 
+        /* new in 7.47.0 */
+        if(config->expect100timeout > 0)
+          my_setopt_str(curl, CURLOPT_EXPECT_100_TIMEOUT_MS,
+                        (long)(config->expect100timeout*1000));
+
         /* initialize retry vars for loop below */
         retry_sleep_default = (config->retry_delay) ?
           config->retry_delay*1000L : RETRY_SLEEP_DEFAULT; /* ms */