CURLINFO_EFFECTIVE_METHOD: added

Provide the HTTP method that was used on the latest request, which might
be relevant for users when there was one or more redirects involved.

Closes #5511

8 files changed, 102 insertions, 8 deletions

diff --git a/docs/libcurl/curl_easy_getinfo.3 b/docs/libcurl/curl_easy_getinfo.3
index 177aea27f..27c277965 100644
--- a/docs/libcurl/curl_easy_getinfo.3
+++ b/docs/libcurl/curl_easy_getinfo.3
@@ -41,6 +41,9 @@ You should not free the memory returned by this function unless it is
 explicitly mentioned below.
 .SH AVAILABLE INFORMATION
 The following information can be extracted:
+.IP CURLINFO_EFFECTIVE_METHOD
+Last used HTTP method.
+See \fICURLINFO_EFFECTIVE_METHOD(3)\fP
 .IP CURLINFO_EFFECTIVE_URL
 Last used URL.
 See \fICURLINFO_EFFECTIVE_URL(3)\fP
diff --git a/docs/libcurl/opts/CURLINFO_EFFECTIVE_METHOD.3 b/docs/libcurl/opts/CURLINFO_EFFECTIVE_METHOD.3
new file mode 100644
index 000000000..deee12546
--- /dev/null
+++ b/docs/libcurl/opts/CURLINFO_EFFECTIVE_METHOD.3
@@ -0,0 +1,68 @@
+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2020, 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 CURLINFO_EFFECTIVE_METHOD 3 "28 Aug 2015" "libcurl 7.72.0" "curl_easy_getinfo options"
+.SH NAME
+CURLINFO_EFFECTIVE_METHOD \- get the last used HTTP method
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_EFFECTIVE_METHOD,
+                           char **methodp);
+.fi
+.SH DESCRIPTION
+Pass in a pointer to a char pointer and get the last used effective HTTP
+method.
+
+In cases when you've asked libcurl to follow redirects, the method may very
+well not be the same method the first request would use.
+
+The \fBmethodp\fP pointer will be NULL or pointing to private memory you MUST
+NOT free - it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the
+corresponding CURL handle.
+.SH PROTOCOLS
+HTTP(S)
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  CURLcode res;
+  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
+  curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "data");
+  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+  res = curl_easy_perform(curl);
+  if(res == CURLE_OK) {
+    char *method = NULL;
+    curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_METHOD, &method);
+    if(method)
+      printf("Redirected to method: %s\\n", method);
+  }
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.72.0
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
diff --git a/docs/libcurl/opts/Makefile.inc b/docs/libcurl/opts/Makefile.inc
index c60b486d1..8708f32ed 100644
--- a/docs/libcurl/opts/Makefile.inc
+++ b/docs/libcurl/opts/Makefile.inc
@@ -35,6 +35,7 @@ man_MANS =                                      \
   CURLINFO_CONTENT_LENGTH_UPLOAD_T.3            \
   CURLINFO_CONTENT_TYPE.3                       \
   CURLINFO_COOKIELIST.3                         \
+  CURLINFO_EFFECTIVE_METHOD.3                   \
   CURLINFO_EFFECTIVE_URL.3                      \
   CURLINFO_FILETIME.3                           \
   CURLINFO_FILETIME_T.3                         \
diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions
index 63fc56b9f..ca2865725 100644
--- a/docs/libcurl/symbols-in-versions
+++ b/docs/libcurl/symbols-in-versions
@@ -229,6 +229,7 @@ CURLINFO_COOKIELIST             7.14.1
 CURLINFO_DATA_IN                7.9.6
 CURLINFO_DATA_OUT               7.9.6
 CURLINFO_DOUBLE                 7.4.1
+CURLINFO_EFFECTIVE_METHOD       7.72.0
 CURLINFO_EFFECTIVE_URL          7.4
 CURLINFO_END                    7.9.6
 CURLINFO_FILETIME               7.5
diff --git a/include/curl/curl.h b/include/curl/curl.h
index 5284cdc43..e231b710c 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -2634,10 +2634,6 @@ typedef enum {
   CURLINFO_PROXY_SSL_VERIFYRESULT = CURLINFO_LONG + 47,
   CURLINFO_PROTOCOL         = CURLINFO_LONG   + 48,
   CURLINFO_SCHEME           = CURLINFO_STRING + 49,
-  /* Fill in new entries below here! */
-
-  /* Preferably these would be defined conditionally based on the
-     sizeof curl_off_t being 64-bits */
   CURLINFO_TOTAL_TIME_T     = CURLINFO_OFF_T + 50,
   CURLINFO_NAMELOOKUP_TIME_T = CURLINFO_OFF_T + 51,
   CURLINFO_CONNECT_TIME_T   = CURLINFO_OFF_T + 52,
@@ -2646,6 +2642,7 @@ typedef enum {
   CURLINFO_REDIRECT_TIME_T  = CURLINFO_OFF_T + 55,
   CURLINFO_APPCONNECT_TIME_T = CURLINFO_OFF_T + 56,
   CURLINFO_RETRY_AFTER      = CURLINFO_OFF_T + 57,
+  CURLINFO_EFFECTIVE_METHOD = CURLINFO_STRING + 58,
 
   CURLINFO_LASTONE          = 57
 } CURLINFO;
diff --git a/lib/getinfo.c b/lib/getinfo.c
index 6d5bd5fc5..675a616f0 100644
--- a/lib/getinfo.c
+++ b/lib/getinfo.c
@@ -95,6 +95,34 @@ static CURLcode getinfo_char(struct Curl_easy *data, CURLINFO info,
   case CURLINFO_EFFECTIVE_URL:
     *param_charp = data->change.url?data->change.url:(char *)"";
     break;
+  case CURLINFO_EFFECTIVE_METHOD: {
+    const char *m = data->set.str[STRING_CUSTOMREQUEST];
+    if(!m) {
+      if(data->set.opt_no_body)
+        m = "HEAD";
+      else {
+        switch(data->state.httpreq) {
+        case HTTPREQ_POST:
+        case HTTPREQ_POST_FORM:
+        case HTTPREQ_POST_MIME:
+          m = "POST";
+          break;
+        case HTTPREQ_PUT:
+          m = "PUT";
+          break;
+        default: /* this should never happen */
+        case HTTPREQ_GET:
+          m = "GET";
+          break;
+        case HTTPREQ_HEAD:
+          m = "HEAD";
+          break;
+        }
+      }
+    }
+    *param_charp = m;
+  }
+    break;
   case CURLINFO_CONTENT_TYPE:
     *param_charp = data->info.contenttype;
     break;
diff --git a/lib/http.c b/lib/http.c
index 28d66c287..8fcdd436d 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -2014,9 +2014,6 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
       case HTTPREQ_PUT:
         request = "PUT";
         break;
-      case HTTPREQ_OPTIONS:
-        request = "OPTIONS";
-        break;
       default: /* this should never happen */
       case HTTPREQ_GET:
         request = "GET";
diff --git a/lib/urldata.h b/lib/urldata.h
index f80a02def..332ffb392 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1195,7 +1195,6 @@ typedef enum {
   HTTPREQ_POST_MIME, /* we make a difference internally */
   HTTPREQ_PUT,
   HTTPREQ_HEAD,
-  HTTPREQ_OPTIONS,
   HTTPREQ_LAST /* last in list */
 } Curl_HttpReq;