1 files changed, 112 insertions, 0 deletions
diff --git a/share/server/util.js b/share/server/util.js
new file mode 100644
index 00000000..7faf2f0b
--- /dev/null
+++ b/share/server/util.js
@@ -0,0 +1,112 @@
+// 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.
+
+function toJSON(val) {
+  if (typeof(val) == "undefined") {
+    throw "Cannot encode 'undefined' value as JSON";
+  }
+  var subs = {'\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f',
+              '\r': '\\r', '"' : '\\"', '\\': '\\\\'};
+  if (typeof(val) == "xml") { // E4X support
+    val = val.toXMLString();
+  }
+  return {
+    "Array": function(v) {
+      var buf = [];
+      for (var i = 0; i < v.length; i++) {
+        buf.push(toJSON(v[i]));
+      }
+      return "[" + buf.join(",") + "]";
+    },
+    "Boolean": function(v) {
+      return v.toString();
+    },
+    "Date": function(v) {
+      var f = function(n) { return n < 10 ? '0' + n : n };
+      return '"' + v.getUTCFullYear()   + '-' +
+                 f(v.getUTCMonth() + 1) + '-' +
+                 f(v.getUTCDate())      + 'T' +
+                 f(v.getUTCHours())     + ':' +
+                 f(v.getUTCMinutes())   + ':' +
+                 f(v.getUTCSeconds())   + 'Z"';
+    },
+    "Number": function(v) {
+      return isFinite(v) ? v.toString() : "null";
+    },
+    "Object": function(v) {
+      if (v === null) return "null";
+      var buf = [];
+      for (var k in v) {
+        if (!v.hasOwnProperty(k) || typeof(k) !== "string" || v[k] === undefined) {
+          continue;
+        }
+        buf.push(toJSON(k, val) + ": " + toJSON(v[k]));
+      }
+      return "{" + buf.join(",") + "}";
+    },
+    "String": function(v) {
+      if (/["\\\x00-\x1f]/.test(v)) {
+        v = v.replace(/([\x00-\x1f\\"])/g, function(a, b) {
+          var c = subs[b];
+          if (c) return c;
+          c = b.charCodeAt();
+          return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
+        });
+      }
+      return '"' + v + '"';
+    }
+  }[val != null ? val.constructor.name : "Object"](val);
+}
+
+function compileFunction(source) {
+  try {
+    var functionObject = sandbox ? evalcx(source, sandbox) : eval(source);
+  } catch (err) {
+    throw {error: "compilation_error",
+      reason: err.toString() + " (" + source + ")"};
+  }
+  if (typeof(functionObject) == "function") {
+    return functionObject;
+  } else {
+    throw {error: "compilation_error",
+      reason: "expression does not eval to a function. (" + source + ")"};
+  }
+}
+
+function recursivelySeal(obj) {
+  seal(obj);
+  for (var propname in obj) {
+    if (typeof doc[propname] == "object") {
+      recursivelySeal(doc[propname]);
+    }
+  }
+}
+
+var responseSent;
+// prints the object as JSON, and rescues and logs any toJSON() related errors
+function respond(obj) {
+  responseSent = true;
+  try {
+    print(toJSON(obj));  
+  } catch(e) {
+    log("Error converting object to JSON: " + e.toString());
+  }
+};
+
+log = function(message) {
+  if (typeof message == "undefined") {
+    message = "Error: attempting to log message of 'undefined'.";
+  } else if (typeof message != "string") {
+    message = toJSON(message);
+  }
+  print(toJSON({log: message}));
+};