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examples/server.js

 
+/**
+
+In this example we create a simple server that serves the first file from disk and subsequent
+requests from cache
+
+**/
+'use strict';
 var http = require('http');
-const PORT = 8080;
+var PORT = 8080;
 
@@ -9,43 +16,20 @@ var fs = require('fs');
 
-function xhandleRequest(request, response) {
-    var _cache = cache.get('a');
-    var meta;
-    if (_cache) {
-        // meta = cache.getMetadata('a');
-        // if (meta && meta.length) {
-        //     response.setHeader('Content-Length', meta.length)
-        //     response.setHeader('Content-Type', 'image/jpeg');
-        // }
-        _cache.pipe(response);
-    }
-    else {
-        var readstream = fs.createReadStream('./stream.jpg');
-        readstream.pipe(cache.set('a')).pipe(response)
-        // fs.readFile('./stream.jpg', function (err, data) {
-        //     //             cache.setData('a', data);
-        //     response.end(data)
-    }
-}
-
-//Create a server
 var server = http.createServer(handleRequest);
+var FILENAME = './stream.jpg';
 
-//Lets start our server
 server.listen(PORT, function () {
-    //Callback triggered when server is successfully listening. Hurray!
-    console.log('Server listening on: http://localhost:%s', PORT);
+	console.log('Server listening on: http://localhost:%s', PORT);
 });
 
 function handleRequest(request, response) {
-    cache.getData('a', function (err, data) {
-        if (data) {
-            response.end(data);
-        }
-        else {
-            fs.readFile('./stream.jpg', function (err, data) {
-                cache.setData('a', data);
-                response.end(data)
-            });
-        }
-    });
+	if (cache.exists(FILENAME)) {
+		response.setHeader('From-Cache', 'true');
+		cache.get(FILENAME).pipe(response);
+	}
+	else {
+		response.setHeader('From-Cache', 'false');
+		fs.createReadStream(FILENAME)
+		.pipe(cache.set(FILENAME))
+		.pipe(response);
+	}
 }

index.js

@@ -89,4 +89,4 @@ 'use strict';
 
-    var hit = this.cache.get(key);
-    return !!(hit && hit.status);
+    var hit = this.cache.has(key);
+    return hit;
 };
@@ -145,12 +145,14 @@
     var chunks = new LinkedList();
-    var stream = new Streams.Duplex()
+    var stream = new Streams.Duplex();
+	stream.unfullfilledReadCount = 0;
 
-    stream._read = function () {
-        var chunk = chunks.shift();
-        if (chunk) {
-            this.push(chunk);
-            this.needRead = false;
-        } else {
-            this.needRead = true;
-        }
+	stream._read = function () {
+		if(chunks.length){
+			var chunk = chunks.shift();
+			this.push(chunk);
+			this.unfullfilledReadCount =  (this.unfullfilledReadCount > 0) ? this.unfullfilledReadCount - 1 : this.unfullfilledReadCount;
+		}
+		else{
+			this.unfullfilledReadCount = this.unfullfilledReadCount + 1;
+		}
     };
@@ -161,5 +163,5 @@
         self.emitters[key].emit('data', chunk);
-        if (this.needRead) {
+        if (this.unfullfilledReadCount > 0) {
             this.push(chunk);
-            this.needRead = false;
+            this.unfullfilledReadCount =  this.unfullfilledReadCount - 1;
         }
@@ -169,3 +171,3 @@ else {
         }
-        next(null, chunk);
+        next();
     }
@@ -184,7 +186,7 @@
     stream.on('finish', function () {
-        if (this.needRead) {
+        if (this.unfullfilledReadCount > 0) {
             this.push(null);
-        }
+       }
         else {
-            chunks.push(null);
+			chunks.push(null);
         }
@@ -191,0 +193,0 @@

package.json

 {
   "name": "streaming-cache",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Cache and replay NodeJS streams",
   "main": "index.js",
   "scripts": {
-    "test": "istanbul  cover ./node_modules/jasmine-node/bin/jasmine-node ./spec --captureExceptions --verbose"
+    "test": "istanbul cover ./node_modules/jasmine-node/bin/jasmine-node ./spec --captureExceptions --verbose && mocha test/integration/*.spec.js"
   },
@@ -20,8 +20,10 @@ "keywords": [
     "lodash.assign": "^4.0.1",
-    "lru-cache": "^2.7.0"
+    "lru-cache": "^2.7.0",
+    "mocha": "^3.2.0"
   },
   "devDependencies": {
     "istanbul": "^0.3.22",
-    "jasmine-node": "^1.14.5"
+    "jasmine-node": "^1.14.5",
+    "supertest": "^3.0.0"
   }
 }

readme.md

@@ -10,3 +10,3 @@ [![Circle CI](https://circleci.com/gh/LaurentZuijdwijk/streaming-cache/tree/master.svg?style=svg)](https://circleci.com/gh/LaurentZuijdwijk/streaming-cache/tree/master)
 
-Uses a fixed size LRU-cache in the background. 
+Uses a fixed size LRU-cache in the background.
 
@@ -36,10 +36,10 @@ Usefull for caching (slow) streaming connections, such as S3 requests or complex database queries.
 
-var readstream = fs.createReadStream('readme.md');
-var writestream = fs.createWriteStream('test2.txt');
+var inputStream = fs.createReadStream('readme.md');
+var outputStream = fs.createWriteStream('test2.txt');
 
-readstream.pipe(cache.set('a'));
+inputStream.pipe(cache.set('myKey'));
 
 setTimeout(function(){
-  writestream2.write('written from cache\n\n');
-  cache.get('a').pipe(writestream);
+  outputStream.write('written from cache\n\n');
+  cache.get('myKey').pipe(outputStream);
  }, 200);
@@ -65,3 +65,3 @@
 
-##### get(key) => ReadableStream 
+##### get(key) => ReadableStream
 
@@ -80,7 +80,7 @@ ```javascript
 #### getData
-Get data with a callback. 
+Get data with a callback.
 
 ```javascript
 cache.getData('key', function(err, data){
-	if(err){ 
+	if(err){
 	  //handle error
@@ -99,2 +99,1 @@ }
 returns true or false if a key exists.
-

spec/streamingCacheSpec.js

@@ -6,6 +6,9 @@ /* jshint jasmine: true */
 var Duplex = require('stream').Duplex;
+var Writable = require('stream').Writable;
 
+
 var cache = new StreamingCache();
 describe('streaming cache', function () {
     var s;
+
     beforeEach(function () {
@@ -19,5 +22,7 @@ cache = new StreamingCache()
     });
+
     it('cache.set should return a stream', function () {
         expect(s).toEqual(jasmine.any(Duplex));
     });
+
     it('Writing to stream should set data', function (done) {
@@ -33,2 +38,26 @@ s.write('a');
 
+    it('reading from a duplex stream should return all data', function(done){
+        var res = '';
+        var stream = new Writable({
+            write(chunk, encoding, callback) {
+                res += chunk;
+                callback();
+            }
+        });
+        stream.on('finish', function(){
+            expect(res).toEqual('abc');
+            done();
+        })
+
+        var cacheStream = s;
+        cacheStream.pipe(stream);
+        cacheStream._read();
+        cacheStream._read();
+        cacheStream.write('a');
+
+        cacheStream.write('b');
+        cacheStream.write('c');
+        cacheStream.end();
+    });
+
     it('getting stream should return readstream', function () {
@@ -50,2 +79,3 @@ var r = cache.get('a');
     });
+
     it('should be written to and readable when set is pending', function (done) {
@@ -72,2 +102,3 @@ var dataSpy = jasmine.createSpy();
     });
+
     it('should handle sync setData', function () {
@@ -112,2 +143,3 @@ expect(cache.setData).toThrow();
     });
+
     it('should handle getmetadata', function () {
@@ -149,2 +181,3 @@ cache.cache.set('abc', {data: 1, metaData: 'bbb'});
     var s;
+
     beforeEach(function () {
@@ -154,2 +187,3 @@ cache = new StreamingCache({maxAge: 100})
     });
+
     it('Writing to stream should set data', function (done) {
@@ -162,3 +196,3 @@ s.write('a');
             cache.getData('b', function (err, data) {
-                expect(data.toString()).toEqual(null)
+                expect(data).toEqual(null)
                 done();
@@ -165,0 +199,0 @@ });

No alert changes

Improved metrics

Total package byte prevSize

7757222

increased by1487.96%

Number of package files

44

increased by18.92%

Lines of code

945

increased by7.51%

Worsened metrics

Dependency count

4

increased by33.33%

Dev dependency count

3

increased by50%

Number of lines in readme file

95

decreased by-1.04%

Number of low supply chain risk alerts

5

increased by25%

Number of medium supply chain risk alerts

2

increased by100%

Dependency changes

• + Addedmocha@^3.2.0

• + Addedbalanced-match@1.0.2(transitive)

• + Addedbrace-expansion@1.1.11(transitive)

• + Addedbrowser-stdout@1.3.0(transitive)

• + Addedcommander@2.9.0(transitive)

• + Addedconcat-map@0.0.1(transitive)

• + Addeddebug@2.6.8(transitive)

• + Addeddiff@3.2.0(transitive)

• + Addedescape-string-regexp@1.0.5(transitive)

• + Addedfs.realpath@1.0.0(transitive)

• + Addedglob@7.1.1(transitive)

• + Addedgraceful-readlink@1.0.1(transitive)

• + Addedgrowl@1.9.2(transitive)

• + Addedhas-flag@1.0.0(transitive)

• + Addedhe@1.1.1(transitive)

• + Addedinflight@1.0.6(transitive)

• + Addedinherits@2.0.4(transitive)

• + Addedjson3@3.3.2(transitive)

• + Addedlodash._baseassign@3.2.0(transitive)

• + Addedlodash._basecopy@3.0.1(transitive)

• + Addedlodash._basecreate@3.0.3(transitive)

• + Addedlodash._getnative@3.9.1(transitive)

• + Addedlodash._isiterateecall@3.0.9(transitive)

• + Addedlodash.create@3.1.1(transitive)

• + Addedlodash.isarguments@3.1.0(transitive)

• + Addedlodash.isarray@3.0.4(transitive)

• + Addedlodash.keys@3.1.2(transitive)

• + Addedminimatch@3.1.2(transitive)

• + Addedminimist@0.0.8(transitive)

• + Addedmkdirp@0.5.1(transitive)

• + Addedmocha@3.5.3(transitive)

• + Addedms@2.0.0(transitive)

• + Addedonce@1.4.0(transitive)

• + Addedpath-is-absolute@1.0.1(transitive)

• + Addedsupports-color@3.1.2(transitive)

• + Addedwrappy@1.0.2(transitive)