refactor main.js into many files and improve show/list error handling

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@766383 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 62 insertions, 0 deletions

diff --git a/share/server/loop.js b/share/server/loop.js
new file mode 100644
index 00000000..170a8dc8
--- /dev/null
+++ b/share/server/loop.js
@@ -0,0 +1,62 @@
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License.  You may obtain a copy
+// of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+var sandbox = null;
+
+try {
+  // if possible, use evalcx (not always available)
+  sandbox = evalcx('');
+  sandbox.emit = emit;
+  sandbox.sum = sum;
+  sandbox.log = log;
+  sandbox.toJSON = toJSON;
+  sandbox.respondWith = respondWith;
+  sandbox.registerType = registerType;
+} catch (e) {}
+
+// Commands are in the form of json arrays:
+// ["commandname",..optional args...]\n
+//
+// Responses are json values followed by a new line ("\n")
+
+var cmd, cmdkey;
+
+var dispatch = {
+  "reset"      : State.reset,
+  "add_fun"    : State.addFun,
+  "map_doc"    : Views.mapDoc,
+  "reduce"     : Views.reduce,
+  "rereduce"   : Views.rereduce,
+  "validate"   : Validate.validate,
+  "show_doc"   : Render.showDoc,
+  "list_begin" : Render.listBegin,
+  "list_row"   : Render.listRow,
+  "list_tail"  : Render.listTail 
+};
+
+while (cmd = eval(readline())) {
+  try {
+    cmdkey = cmd.shift();
+    if (dispatch[cmdkey]) {
+      // run the correct responder with the cmd body
+      dispatch[cmdkey].apply(this, cmd);
+    } else {
+      // unknown command, quit and hope the restarted version is better
+      respond({
+        error: "query_server_error",
+        reason: "unknown command '" + cmdkey + "'"});
+      quit();
+    }
+  } catch(e) {
+    respond(e);
+  }
+};