http: optimize default method case

PR-URL: https://github.com/nodejs/node/pull/10654
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>

lib/_http_client.js

@@ -102,10 +102,21 @@ function ClientRequest(options, cb) {
   self.socketPath = options.socketPath;
   self.timeout = options.timeout;
 
-  var method = self.method = (options.method || 'GET').toUpperCase();
-  if (!common._checkIsHttpToken(method)) {
-    throw new TypeError('Method must be a valid HTTP token');
+  var method = options.method;
+  var methodIsString = (typeof method === 'string');
+  if (method != null && !methodIsString) {
+    throw new TypeError('Method must be a string');
   }
+
+  if (methodIsString && method) {
+    if (!common._checkIsHttpToken(method)) {
+      throw new TypeError('Method must be a valid HTTP token');
+    }
+    method = self.method = method.toUpperCase();
+  } else {
+    method = self.method = 'GET';
+  }
+
   self.path = options.path || '/';
   if (cb) {
     self.once('response', cb);

lib/_http_common.js

@@ -265,8 +265,6 @@ var validTokens = [
   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  // ... 255
 ];
 function checkIsHttpToken(val) {
-  if (typeof val !== 'string' || val.length === 0)
-    return false;
   if (!validTokens[val.charCodeAt(0)])
     return false;
   if (val.length < 2)

lib/_http_outgoing.js

@@ -319,18 +319,18 @@ function _storeHeader(firstLine, headers) {
   if (state.sentExpect) this._send('');
 }
 
-function storeHeader(self, state, field, value) {
-  if (!checkIsHttpToken(field)) {
+function storeHeader(self, state, key, value) {
+  if (typeof key !== 'string' || !key || !checkIsHttpToken(key)) {
     throw new TypeError(
-      'Header name must be a valid HTTP Token ["' + field + '"]');
+      'Header name must be a valid HTTP Token ["' + key + '"]');
   }
   if (checkInvalidHeaderChar(value)) {
-    debug('Header "%s" contains invalid characters', field);
+    debug('Header "%s" contains invalid characters', key);
     throw new TypeError('The header content contains invalid characters');
   }
-  state.messageHeader += field + ': ' + escapeHeaderValue(value) + CRLF;
+  state.messageHeader += key + ': ' + escapeHeaderValue(value) + CRLF;
 
-  if (connectionExpression.test(field)) {
+  if (connectionExpression.test(key)) {
     state.sentConnectionHeader = true;
     if (connCloseExpression.test(value)) {
       self._last = true;
@@ -339,26 +339,26 @@ function storeHeader(self, state, field, value) {
     }
     if (connUpgradeExpression.test(value))
       state.sentConnectionUpgrade = true;
-  } else if (transferEncodingExpression.test(field)) {
+  } else if (transferEncodingExpression.test(key)) {
     state.sentTransferEncodingHeader = true;
     if (trfrEncChunkExpression.test(value)) self.chunkedEncoding = true;
 
-  } else if (contentLengthExpression.test(field)) {
+  } else if (contentLengthExpression.test(key)) {
     state.sentContentLengthHeader = true;
-  } else if (dateExpression.test(field)) {
+  } else if (dateExpression.test(key)) {
     state.sentDateHeader = true;
-  } else if (expectExpression.test(field)) {
+  } else if (expectExpression.test(key)) {
     state.sentExpect = true;
-  } else if (trailerExpression.test(field)) {
+  } else if (trailerExpression.test(key)) {
     state.sentTrailer = true;
-  } else if (upgradeExpression.test(field)) {
+  } else if (upgradeExpression.test(key)) {
     state.sentUpgrade = true;
   }
 }
 
 
 OutgoingMessage.prototype.setHeader = function setHeader(name, value) {
-  if (!checkIsHttpToken(name))
+  if (typeof name !== 'string' || !name || !checkIsHttpToken(name))
     throw new TypeError(
       'Header name must be a valid HTTP Token ["' + name + '"]');
   if (value === undefined)
@@ -538,7 +538,7 @@ OutgoingMessage.prototype.addTrailers = function addTrailers(headers) {
       field = key;
       value = headers[key];
     }
-    if (!checkIsHttpToken(field)) {
+    if (typeof field !== 'string' || !field || !checkIsHttpToken(field)) {
       throw new TypeError(
         'Trailer name must be a valid HTTP Token ["' + field + '"]');
     }