Merge pull request #886 from NodeRedis/fix-parser

Fix js parser regression.

Fixes #881 
Fixes #880 
Fixes #875

appveyor.yml

@@ -17,8 +17,8 @@ install:
   - '@ECHO Redis Started'
   # Get the latest stable version of Node 0.STABLE.latest
   - ps: Install-Product node $env:nodejs_version
-  # Typical npm stuff.
-  - npm install
+  # Typical npm stuff. Use msvs 2013 for the hiredis parser
+  - npm install --msvs_version=2013
 
 # Post-install test scripts.
 test_script:

lib/parsers/javascript.js

@@ -2,11 +2,6 @@
 
 var util   = require('util');
 
-function Packet(type, size) {
-    this.type = type;
-    this.size = +size;
-}
-
 function ReplyParser(return_buffers) {
     this.name = exports.name;
     this.return_buffers = return_buffers;
@@ -23,7 +18,10 @@ function IncompleteReadBuffer(message) {
 util.inherits(IncompleteReadBuffer, Error);
 
 ReplyParser.prototype._parseResult = function (type) {
-    var start, end, offset, packetHeader;
+    var start = 0,
+        end = 0,
+        offset = 0,
+        packetHeader = 0;
 
     if (type === 43 || type === 45) { // + or -
         // up to the delimiter
@@ -62,14 +60,14 @@ ReplyParser.prototype._parseResult = function (type) {
         // buffer in memory
         offset = this._offset - 1;
 
-        packetHeader = new Packet(type, this.parseHeader());
+        packetHeader = this.parseHeader();
 
         // packets with a size of -1 are considered null
-        if (packetHeader.size === -1) {
+        if (packetHeader === -1) {
             return null;
         }
 
-        end = this._offset + packetHeader.size;
+        end = this._offset + packetHeader;
         start = this._offset;
 
         if (end > this._buffer.length) {
@@ -83,15 +81,15 @@ ReplyParser.prototype._parseResult = function (type) {
             return this._buffer.slice(start, end);
         }
         return this._buffer.toString(this._encoding, start, end);
-    } else { // *
+    } else if (type === 42) { // *
         offset = this._offset;
-        packetHeader = new Packet(type, this.parseHeader());
+        packetHeader = this.parseHeader();
 
-        if (packetHeader.size < 0) {
+        if (packetHeader < 0) {
             return null;
         }
 
-        if (packetHeader.size > this._bytesRemaining()) {
+        if (packetHeader > this._bytesRemaining()) {
             this._offset = offset - 1;
             throw new IncompleteReadBuffer('Wait for more data.');
         }
@@ -101,7 +99,7 @@ ReplyParser.prototype._parseResult = function (type) {
 
         offset = this._offset - 1;
 
-        for (i = 0; i < packetHeader.size; i++) {
+        for (i = 0; i < packetHeader; i++) {
             ntype = this._buffer[this._offset++];
 
             if (this._offset > this._buffer.length) {
@@ -184,7 +182,7 @@ ReplyParser.prototype.append = function (newBuffer) {
 
 ReplyParser.prototype.parseHeader = function () {
     var end   = this._packetEndOffset(),
-        value = this._buffer.toString('ascii', this._offset, end - 1);
+        value = this._buffer.toString('ascii', this._offset, end - 1) | 0;
 
     this._offset = end + 1;
 

test/helper.js

@@ -113,8 +113,11 @@ module.exports = {
         }
         var parsers = ['javascript'];
         var protocols = ['IPv4'];
-        if (process.platform !== 'win32') {
+        try {
+            require('hiredis');
             parsers.push('hiredis');
+        } catch (e) {}
+        if (process.platform !== 'win32') {
             protocols.push('IPv6', '/tmp/redis.sock');
         }
         var options = [{