http: add --strip-path-slash and CURLOPT_STRIP_PATH_SLASH

... to enable sending "OPTIONS *" which wasn't possible previously.

This option currently only works for HTTP.

Added test cases 1298 + 1299 to verify

Fixes #1280
Closes #1462

9 files changed, 74 insertions, 23 deletions

diff --git a/docs/TODO b/docs/TODO
index 22c9beb6f..5db21e1bf 100644
--- a/docs/TODO
+++ b/docs/TODO
@@ -69,7 +69,6 @@
  5.9 Improve formpost API
  5.10 Leave secure cookies alone
  5.11 Chunked transfer multipart formpost
- 5.12 OPTIONS *
 
  6. TELNET
  6.1 ditch stdin
@@ -558,23 +557,6 @@ This is not detailed in any FTP specification.
 
  https://github.com/curl/curl/issues/1139
 
-5.12 OPTIONS *
-
- HTTP defines an OPTIONS method that can be sent with an asterisk option like
- "OPTIONS *" to ask about options from the server and not a specific URL
- resource. https://tools.ietf.org/html/rfc7230#section-5.3.4
-
- libcurl as it currently works will always sent HTTP methods with a path that
- starts with a slash so there's no way for an application to send a proper
- "OPTIONS *" using libcurl. This should be fixed.
-
- I can't think of any other non-slash paths we should support so it will
- probably make sense to add a new boolean option for issuign an "OPTIONS *"
- request. CURLOPT_OPTIONSASTERISK perhaps (and a corresponding command line
- option)?
-
- See https://github.com/curl/curl/issues/1280
-
 
 6. TELNET
 
diff --git a/docs/cmdline-opts/Makefile.inc b/docs/cmdline-opts/Makefile.inc
index 4577fac7c..edc86fe1a 100644
--- a/docs/cmdline-opts/Makefile.inc
+++ b/docs/cmdline-opts/Makefile.inc
@@ -42,6 +42,6 @@ DPAGES = abstract-unix-socket.d anyauth.d append.d basic.d cacert.d capath.d cer
   tlsauthtype.d tlspassword.d tlsuser.d tlsv1.0.d tlsv1.1.d tlsv1.2.d   \
   tlsv1.3.d tlsv1.d trace-ascii.d trace.d trace-time.d tr-encoding.d    \
   unix-socket.d upload-file.d url.d use-ascii.d user-agent.d user.d     \
-  verbose.d version.d write-out.d xattr.d
+  verbose.d version.d write-out.d xattr.d strip-path-slash.d
 
 OTHERPAGES = page-footer page-header
diff --git a/docs/cmdline-opts/strip-path-slash.d b/docs/cmdline-opts/strip-path-slash.d
new file mode 100644
index 000000000..4aee947dd
--- /dev/null
+++ b/docs/cmdline-opts/strip-path-slash.d
@@ -0,0 +1,7 @@
+Long: strip-path-slash
+Help: Strip off the first slash of the path
+Protocols: HTTP
+---
+Tells curl to strip the leading slash from the path when it sends the path to
+the server. Useful when wanting to issue HTTP requests without leading slash,
+like "OPTIONS *".
diff --git a/docs/libcurl/curl_easy_setopt.3 b/docs/libcurl/curl_easy_setopt.3
index cb6884766..70e1ee8fd 100644
--- a/docs/libcurl/curl_easy_setopt.3
+++ b/docs/libcurl/curl_easy_setopt.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -303,6 +303,8 @@ Start a new cookie session. See \fICURLOPT_COOKIESESSION(3)\fP
 Add or control cookies. See \fICURLOPT_COOKIELIST(3)\fP
 .IP CURLOPT_HTTPGET
 Do a HTTP GET request. See \fICURLOPT_HTTPGET(3)\fP
+.IP CURLOPT_STRIP_PATH_SLASH
+Cut off the leading slash from the path. \fICURLOPT_STRIP_PATH_SLASH(3)\fP
 .IP CURLOPT_HTTP_VERSION
 HTTP version to use. \fICURLOPT_HTTP_VERSION(3)\fP
 .IP CURLOPT_IGNORE_CONTENT_LENGTH
diff --git a/docs/libcurl/opts/CURLOPT_CUSTOMREQUEST.3 b/docs/libcurl/opts/CURLOPT_CUSTOMREQUEST.3
index b20d6836c..e53504491 100644
--- a/docs/libcurl/opts/CURLOPT_CUSTOMREQUEST.3
+++ b/docs/libcurl/opts/CURLOPT_CUSTOMREQUEST.3
@@ -108,3 +108,4 @@ Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
 CURLE_OUT_OF_MEMORY if there was insufficient heap space.
 .SH "SEE ALSO"
 .BR CURLOPT_HTTPHEADER "(3), " CURLOPT_NOBODY "(3), "
+.BR CURLOPT_STRIP_PATH_SLASH "(3), "
diff --git a/docs/libcurl/opts/CURLOPT_NOBODY.3 b/docs/libcurl/opts/CURLOPT_NOBODY.3
index 340b9f454..d0116a9ed 100644
--- a/docs/libcurl/opts/CURLOPT_NOBODY.3
+++ b/docs/libcurl/opts/CURLOPT_NOBODY.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -44,10 +44,10 @@ curl = curl_easy_init();
 if(curl) {
   curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
 
-  /* get us the resource without a body! */ 
+  /* get us the resource without a body! */
   curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
 
-  /* Perform the request */ 
+  /* Perform the request */
   curl_easy_perform(curl);
 }
 .fi
@@ -57,3 +57,4 @@ Always
 Returns CURLE_OK
 .SH "SEE ALSO"
 .BR CURLOPT_HTTPGET "(3), " CURLOPT_POST "(3), "
+.BR CURLOPT_STRIP_PATH_SLASH "(3), "
diff --git a/docs/libcurl/opts/CURLOPT_STRIP_PATH_SLASH.3 b/docs/libcurl/opts/CURLOPT_STRIP_PATH_SLASH.3
new file mode 100644
index 000000000..5d0886782
--- /dev/null
+++ b/docs/libcurl/opts/CURLOPT_STRIP_PATH_SLASH.3
@@ -0,0 +1,56 @@
+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_STRIP_PATH_SLASH 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_STRIP_PATH_SLASH \- strip the leading slash from the path
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STRIP_PATH_SLASH, value);
+.SH DESCRIPTION
+Pass a long set to 1 to tell libcurl to strip out the leading slash from the
+path when used on the server.
+.SH DEFAULT
+0 - use the leading slash.
+.SH PROTOCOLS
+HTTP
+.SH EXAMPLE
+.nf
+curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/*");
+  curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "OPTIONS");
+
+  /* issue an OPTIONS * request (no leading slash) */
+  curl_easy_setopt(curl, CURLOPT_STRIP_PATH_SLASH, 1L);
+
+  /* Perform the request */
+  curl_easy_perform(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.55.0
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_CUSTOMREQUEST "(3), " CURLOPT_HTTPGET "(3), "
diff --git a/docs/libcurl/opts/Makefile.inc b/docs/libcurl/opts/Makefile.inc
index 5a201fe3f..40930dc5d 100644
--- a/docs/libcurl/opts/Makefile.inc
+++ b/docs/libcurl/opts/Makefile.inc
@@ -278,6 +278,7 @@ man_MANS =                                      \
   CURLOPT_STREAM_DEPENDS.3                      \
   CURLOPT_STREAM_DEPENDS_E.3                    \
   CURLOPT_STREAM_WEIGHT.3                       \
+  CURLOPT_STRIP_PATH_SLASH.3                    \
   CURLOPT_SUPPRESS_CONNECT_HEADERS.3            \
   CURLOPT_TCP_FASTOPEN.3                        \
   CURLOPT_TCP_KEEPALIVE.3                       \
diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions
index 169ec8fe3..c9a53cb1c 100644
--- a/docs/libcurl/symbols-in-versions
+++ b/docs/libcurl/symbols-in-versions
@@ -409,6 +409,7 @@ CURLOPT_HTTPPOST                7.1
 CURLOPT_HTTPPROXYTUNNEL         7.3
 CURLOPT_HTTPREQUEST             7.1           -           7.15.5
 CURLOPT_HTTP_CONTENT_DECODING   7.16.2
+CURLOPT_STRIP_PATH_SLASH        7.55.0
 CURLOPT_HTTP_TRANSFER_DECODING  7.16.2
 CURLOPT_HTTP_VERSION            7.9.1
 CURLOPT_IGNORE_CONTENT_LENGTH   7.14.1