release 0.9.0

- support protobuf converter

lib/config.js

@@ -239,9 +239,9 @@ function parseContext(serviceID, options) {
     // }
     // context.protocolContext = contextCache[serviceID].protocol;
     context.packConverter = RalModule.modules.converter[options.pack || serviceInfo.pack];
-    context.pack = context.packConverter.pack;
+    context.pack = context.packConverter.pack.bind(context.packConverter);
     context.unpackConverter = RalModule.modules.converter[options.unpack || serviceInfo.unpack];
-    context.unpack = context.unpackConverter.unpack;
+    context.unpack = context.unpackConverter.unpack.bind(context.unpackConverter);
     return context;
 }
 

lib/ext/converter/protobufConverter.js

@@ -0,0 +1,95 @@
+/**
+ * @file node-ral
+ * @author [email protected]
+ * http://fis.baidu.com/
+ * 2014/8/5
+ */
+
+'use strict';
+
+var Converter = require('../../converter.js');
+var logger = require('../../logger.js')('ProtobufConverter');
+var util = require('util');
+var iconv = require('iconv-lite');
+var ProtoBuf = require("protobufjs");
+
+function ProtobufConverter() {
+    this.globalPbBuilderCache = {};
+    Converter.call(this);
+}
+
+util.inherits(ProtobufConverter, Converter);
+
+ProtobufConverter.prototype.normalizeConfig = function(config) {
+    // save proto build for every service
+    var root = this.globalPbBuilderCache[config.serviceID];
+    if (!root) {
+        var builder = ProtoBuf.newBuilder(config.pbConfig || {});
+        if (config.protoPaths instanceof Array === false) {
+            config.protoPaths = [config.protoPaths];
+        }
+        config.protoPaths.forEach(function(protoPath) {
+            ProtoBuf.loadProtoFile(protoPath, builder);
+        });
+        root = builder.build();
+        this.globalPbBuilderCache[config.serviceID] = root;
+    }
+    config.protoRoot = root;
+};
+
+ProtobufConverter.prototype.unpack = function(config, data) {
+    try {
+        this.normalizeConfig(config);
+        var root = config.protoRoot;
+        if (!config.decodeMessageName) {
+            throw new Error("decodeMessageName is needed unpack protobuf data");
+        }
+        var MessageClass;
+        config.decodeMessageName.split('.').forEach(function(name) {
+            MessageClass = MessageClass ? MessageClass[name] : root[name];
+        });
+        var obj = MessageClass.decode(data);
+        logger.trace('unpack protobuf data succ ServiceID=' + config.serviceID);
+        return obj;
+    } catch (ex) {
+        logger.trace('unpack protobuf data failed ServiceID=' + config.serviceID);
+        throw ex;
+    }
+};
+
+ProtobufConverter.prototype.pack = function(config, data) {
+    data = data || {};
+    var buffer;
+    try {
+        if (config.json2Pb === false) {
+            buffer = data.toBuffer();
+        } else {
+            this.normalizeConfig(config);
+            var root = config.protoRoot;
+            if (!config.encodeMessageName) {
+                throw new Error("encodeMessageName is needed to pack protobuf data");
+            }
+            var MessageClass;
+            config.encodeMessageName.split('.').forEach(function(name) {
+                MessageClass = MessageClass ? MessageClass[name] : root[name];
+            });
+            var message = new MessageClass(data);
+            buffer = message.toBuffer();
+        }
+        if (!config.skipContentLength) {
+            config.headers = config.headers || {};
+            config.headers['Content-Length'] = buffer.length;
+        }
+    } catch (ex) {
+        logger.trace('pack protobuf data failed data=' + data + ' ServiceID=' + config.serviceID);
+        throw ex;
+    }
+    logger.trace('pack protobuf data succ ServiceID=' + config.serviceID + ' length=' + buffer.length);
+    return buffer;
+};
+
+ProtobufConverter.prototype.getName = function() {
+    return 'protobuf';
+};
+
+module.exports = ProtobufConverter;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-ral",
-  "version": "0.8.2",
+  "version": "0.9.0",
   "description": "a rpc client for node",
   "main": "index.js",
   "scripts": {
@@ -31,6 +31,7 @@
     "https-proxy-agent": "1.0.0",
     "iconv-lite": "0.4.13",
     "performance-now": "0.2.0",
+    "protobufjs": "5.0.1",
     "soap": "0.8.0",
     "underscore": "1.6.0",
     "urlencode": "1.1.0",