Merge branch 'master' of https://github.com/HumairAK/solutions_repo

1 files changed, 187 insertions, 0 deletions

diff --git a/node_modules/express-minify/index.js b/node_modules/express-minify/index.js
new file mode 100755
index 0000000..aa199ec
--- /dev/null
+++ b/node_modules/express-minify/index.js
@@ -0,0 +1,187 @@
+var crypto = require('crypto');
+var onHeaders = require('on-headers');
+
+var Factory = function (options) {
+  return createMiddleware(options);
+};
+
+Factory.Cache = require('./cache.js');
+Factory.Minifier = require('./minifier.js');
+
+module.exports = Factory;
+
+var createMiddleware = function express_minify(options) {
+  options = options || {};
+
+  var js_match = options.js_match || /javascript/;
+  var css_match = options.css_match || /css/;
+  var sass_match = options.sass_match || /scss/;
+  var less_match = options.less_match || /less/;
+  var stylus_match = options.stylus_match || /stylus/;
+  var coffee_match = options.coffee_match || /coffeescript/;
+  var json_match = options.json_match || /json/;
+
+  var cache = new Factory.Cache(options.cache || false);
+  var minifier = new Factory.Minifier(options.uglifyJS, options.cssmin, options.onerror);
+
+  return function express_minify_middleware(req, res, next) {
+    var write = res.write;
+    var end = res.end;
+
+    var buf = null;
+    var type = Factory.Minifier.TYPE_TEXT;
+
+    onHeaders(res, function () {
+      if (req.method === 'HEAD') {
+        return;
+      }
+
+      if (res._skip) {
+        return;
+      }
+
+      var contentType = res.getHeader('Content-Type');
+      if (contentType === undefined) {
+        return;
+      }
+
+      // for sass, less, stylus, coffee module:
+      //    null: module is found but not loaded
+      //    false: module not found
+      // so we should not process false values, but allow null values
+      if (minifier.sass !== false && sass_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_SASS;
+        res.setHeader('Content-Type', 'text/css');
+      } else if (minifier.less !== false && less_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_LESS;
+        res.setHeader('Content-Type', 'text/css');
+      } else if (minifier.stylus !== false && stylus_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_STYLUS;
+        res.setHeader('Content-Type', 'text/css');
+      } else if (minifier.coffee !== false && coffee_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_COFFEE;
+        res.setHeader('Content-Type', 'text/javascript');
+      } else if (json_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_JSON;
+      } else if (js_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_JS;
+      } else if (css_match.test(contentType)) {
+        type = Factory.Minifier.TYPE_CSS;
+      }
+
+      if (type === Factory.Minifier.TYPE_TEXT) {
+        return;
+      }
+
+      if ((type === Factory.Minifier.TYPE_JS || type === Factory.Minifier.TYPE_CSS) && res._no_minify) {
+        return;
+      }
+
+      res.removeHeader('Content-Length');
+
+      // prepare the buffer
+      buf = [];
+    });
+
+    res.write = function (chunk, encoding) {
+      if (!this._header) {
+        this._implicitHeader();
+      }
+
+      if (buf === null) {
+        return write.call(this, chunk, encoding);
+      }
+
+      if (!this._hasBody) {
+        return true;
+      }
+
+      if (typeof chunk !== 'string' && !Buffer.isBuffer(chunk)) {
+        throw new TypeError('first argument must be a string or Buffer');
+      }
+
+      if (chunk.length === 0) {
+        return true;
+      }
+
+      // no chunked_encoding here
+      if (typeof chunk === 'string') {
+        chunk = new Buffer(chunk, encoding);
+      }
+
+      buf.push(chunk);
+    };
+
+    res.end = function (data, encoding) {
+      if (this.finished) {
+        return false;
+      }
+
+      if (!this._header) {
+        this._implicitHeader();
+      }
+
+      if (data && !this._hasBody) {
+        data = false;
+      }
+
+      if (buf === null) {
+        return end.call(this, data, encoding);
+      }
+
+      // TODO: implement hot-path optimization
+      if (data) {
+        this.write(data, encoding);
+      }
+
+      var buffer = Buffer.concat(buf);
+
+      // prepare uglify options
+      var uglifyOptions = {};
+      if (this._no_mangle) {
+        uglifyOptions.mangle = false;
+      }
+      if (this._uglifyMangle !== undefined) {
+        uglifyOptions.mangle = this._uglifyMangle;
+      }
+      if (this._uglifyOutput !== undefined) {
+        uglifyOptions.output = this._uglifyOutput;
+      }
+      if (this._uglifyCompress !== undefined) {
+        uglifyOptions.compress = this._uglifyCompress;
+      }
+
+      var minifyOptions = {
+        uglifyOpt: uglifyOptions,
+        noMinify: this._no_minify
+      };
+
+      var cacheKey = crypto.createHash('sha1').update(JSON.stringify(minifyOptions) + buffer).digest('hex').toString();
+      var self = this;
+
+      cache.layer.get(cacheKey, function (err, minized) {
+        if (err) {
+          // cache miss
+          minifier.compileAndMinify(type, minifyOptions, buffer.toString(encoding), function (err, minized) {
+            if (self._no_cache || err) {
+              // do not cache the response body
+              write.call(self, minized, 'utf8');
+              end.call(self);
+            } else {
+              cache.layer.put(cacheKey, minized, function () {
+                write.call(self, minized, 'utf8');
+                end.call(self);
+              });
+            }
+          });
+        } else {
+          // cache hit
+          write.call(self, minized, 'utf8');
+          end.call(self);
+        }
+      });
+    };
+
+    next();
+  };
+};