Enabling POST method options

Author: shrutigarg

src/Common/src/Interop/Unix/libcurl/Interop.libcurl_types.cs

@@ -29,8 +29,10 @@ internal static partial class CURLoption
 
             internal const int CURLOPT_NOBODY = CurlOptionLongBase + 44;
             internal const int CURLOPT_UPLOAD = CurlOptionLongBase + 46;
+            internal const int CURLOPT_POST = CurlOptionLongBase + 47;
             internal const int CURLOPT_FOLLOWLOCATION = CurlOptionLongBase + 52;
             internal const int CURLOPT_PROXYPORT = CurlOptionLongBase + 59;
+            internal const int CURLOPT_POSTFIELDSIZE = CurlOptionLongBase + 60;
             internal const int CURLOPT_MAXREDIRS = CurlOptionLongBase + 68;
             internal const int CURLOPT_PROXYTYPE = CurlOptionLongBase + 101;
 
@@ -39,6 +41,7 @@ internal static partial class CURLoption
             internal const int CURLOPT_PROXY = CurlOptionObjectPointBase + 4;
             internal const int CURLOPT_PROXYUSERPWD = CurlOptionObjectPointBase + 6;
             internal const int CURLOPT_READDATA = CurlOptionObjectPointBase + 9;
+            internal const int CURLOPT_POSTFIELDS = CurlOptionObjectPointBase + 15;
             internal const int CURLOPT_COOKIE = CurlOptionObjectPointBase + 22;
             internal const int CURLOPT_HTTPHEADER = CurlOptionObjectPointBase + 23;
             internal const int CURLOPT_HEADERDATA = CurlOptionObjectPointBase + 29;

src/System.Net.Http/src/System/Net/Http/Unix/CurlHandler.cs

@@ -434,14 +434,24 @@ private SafeCurlHandle CreateRequestHandle(RequestCompletionSource state, GCHand
                 // Set maximum automatic redirection option
                 SetCurlOption(requestHandle, CURLoption.CURLOPT_MAXREDIRS, _maxAutomaticRedirections);
             }
-            if (state.RequestMessage.Content != null)
+
+            if (state.RequestMessage.Method == HttpMethod.Put)
             {
                 SetCurlOption(requestHandle, CURLoption.CURLOPT_UPLOAD, 1L);
             }
-            if (state.RequestMessage.Method == HttpMethod.Head)
+            else if (state.RequestMessage.Method == HttpMethod.Head)
             {
                 SetCurlOption(requestHandle, CURLoption.CURLOPT_NOBODY, 1L);
             }
+            else if (state.RequestMessage.Method == HttpMethod.Post)
+            {
+                SetCurlOption(requestHandle, CURLoption.CURLOPT_POST, 1L);
+                if (state.RequestMessage.Content == null)
+                {
+                    SetCurlOption(requestHandle, CURLoption.CURLOPT_POSTFIELDSIZE, 0L);
+                    SetCurlOption(requestHandle, CURLoption.CURLOPT_POSTFIELDS, "");
+                }
+            }
 
             IntPtr statePtr = GCHandle.ToIntPtr(stateHandle);
             SetCurlOption(requestHandle, CURLoption.CURLOPT_PRIVATE, statePtr);