Support PATCH method

Requested in https://groups.google.com/forum/#!topic/nodejs-dev/iEOyiDkJRLs

http_parser.c

@@ -100,6 +100,7 @@ static const char *method_strings[] =
   , "NOTIFY"
   , "SUBSCRIBE"
   , "UNSUBSCRIBE"
+  , "PATCH"
   };
 
 
@@ -601,7 +602,9 @@ size_t http_parser_execute (http_parser *parser,
           case 'M': parser->method = HTTP_MKCOL; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH */ break;
           case 'N': parser->method = HTTP_NOTIFY; break;
           case 'O': parser->method = HTTP_OPTIONS; break;
-          case 'P': parser->method = HTTP_POST; /* or PROPFIND or PROPPATCH or PUT */ break;
+          case 'P': parser->method = HTTP_POST;
+            /* or PROPFIND or PROPPATCH or PUT or PATCH */
+            break;
           case 'R': parser->method = HTTP_REPORT; break;
           case 'S': parser->method = HTTP_SUBSCRIBE; break;
           case 'T': parser->method = HTTP_TRACE; break;
@@ -642,6 +645,8 @@ size_t http_parser_execute (http_parser *parser,
           parser->method = HTTP_PROPFIND; /* or HTTP_PROPPATCH */
         } else if (index == 1 && parser->method == HTTP_POST && ch == 'U') {
           parser->method = HTTP_PUT;
+        } else if (index == 1 && parser->method == HTTP_POST && ch == 'A') {
+          parser->method = HTTP_PATCH;
         } else if (index == 2 && parser->method == HTTP_UNLOCK && ch == 'S') {
           parser->method = HTTP_UNSUBSCRIBE;
         } else if (index == 4 && parser->method == HTTP_PROPFIND && ch == 'P') {

http_parser.h

@@ -106,6 +106,8 @@ enum http_method
   , HTTP_NOTIFY
   , HTTP_SUBSCRIBE
   , HTTP_UNSUBSCRIBE
+  /* RFC-5789 */
+  , HTTP_PATCH
   };
 
 

test.c

@@ -686,6 +686,35 @@ const struct message requests[] =
   }
 #endif  /* !HTTP_PARSER_STRICT */
 
+#define PATCH_REQ 26
+, {.name = "PATCH request"
+  ,.type= HTTP_REQUEST
+  ,.raw= "PATCH /file.txt HTTP/1.1\r\n"
+         "Host: www.example.com\r\n"
+         "Content-Type: application/example\r\n"
+         "If-Match: \"e0023aa4e\"\r\n"
+         "Content-Length: 10\r\n"
+         "\r\n"
+         "cccccccccc"
+  ,.should_keep_alive= TRUE
+  ,.message_complete_on_eof= FALSE
+  ,.http_major= 1
+  ,.http_minor= 1
+  ,.method= HTTP_PATCH
+  ,.query_string= ""
+  ,.fragment= ""
+  ,.request_path= "/file.txt"
+  ,.request_url= "/file.txt"
+  ,.num_headers= 4
+  ,.upgrade=0
+  ,.headers= { { "Host", "www.example.com" }
+             , { "Content-Type", "application/example" }
+             , { "If-Match", "\"e0023aa4e\"" }
+             , { "Content-Length", "10" }
+             }
+  ,.body= "cccccccccc"
+  }
+
 , {.name= NULL } /* sentinel */
 };