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README.md

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+# HTTP文件浏览 Version2
+
+## 改进
+之前做的[HTTP浏览](http://moyuyc.github.io/2016/05/28/node-express-jade%E5%AE%9E%E7%8E%B0HTTP%E6%96%87%E4%BB%B6%E6%B5%8F%E8%A7%88%E5%99%A8/)是使用express2.x版本做的...，因为参考书比较旧了。
+1. `express2.x`中没有`express4.x`中的`res.sendFile()`方法，之前发送文件是使用的`stream.pipe()`方法，导致不支持继续下载，而且用户不能知道下载进度，在线音乐视频播放也不能选择时间跳跃欣赏。`res.sendFile()`方法可以将本地文件以静态资源发送给用户，所有问题迎刃而解。
+2. 旧版本不支持`java/c/cpp/js/css/html`等代码文件和`md/markdown`文件在线查看，所以进行改进。
+3. 利用`Bootstrap responsive utils`和`Bootstrap grid system`进行响应式布局。
+4. 监控`root.txt`文件，改变root后无需重启服务器。
+5. 去除对`q.js`依赖，使用原生`Promise`
+
+## 说明
+- `root.txt` :共享文件夹路径
+- `app.js` :入口
+
+## 使用
+1.       npm install
+2.       npm start
+3.       http://localhost:3500/ 

app.js

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+var express = require('express');
+var path = require('path');
+var favicon = require('serve-favicon');
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+
+var routes = require('./routes/index');
+var users = require('./routes/users');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+// app.use(express.static(path.join('/')));
+var fs = require('fs');
+
+global.root = fs.readFileSync('./root.txt').toString().split(/\s+/)[0];
+fs.watchFile('./root.txt',function () {
+  global.root = fs.readFileSync('./root.txt').toString().split(/\s+/)[0];
+});
+app.use('/users', users);
+app.use('/*', routes.index);
+
+app.listen(3500);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// error handlers
+
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: err
+    });
+  });
+}
+
+// production error handler
+// no stacktraces leaked to user
+app.use(function(err, req, res, next) {
+  res.status(err.status || 500);
+  res.render('error', {
+    message: err.message,
+    error: {}
+  });
+});
+
+
+module.exports = app;

bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('4.x:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

npm-debug.log

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+0 info it worked if it ends with ok
+1 verbose cli [ '/usr/local/node-v4.4.7-linux-x64/bin/node',
+1 verbose cli   '/usr/local/node-v4.4.7-linux-x64/bin/npm',
+1 verbose cli   'start' ]
+2 info using [email protected]
+3 info using [email protected]
+4 verbose run-script [ 'prestart', 'start', 'poststart' ]
+5 info prestart [email protected]
+6 info start [email protected]
+7 verbose unsafe-perm in lifecycle true
+8 info [email protected] Failed to exec start script
+9 verbose stack Error: [email protected] start: `node ./bin/www`
+9 verbose stack Exit status 1
+9 verbose stack     at EventEmitter.<anonymous> (/usr/local/node-v4.4.7-linux-x64/lib/node_modules/npm/lib/utils/lifecycle.js:217:16)
+9 verbose stack     at emitTwo (events.js:87:13)
+9 verbose stack     at EventEmitter.emit (events.js:172:7)
+9 verbose stack     at ChildProcess.<anonymous> (/usr/local/node-v4.4.7-linux-x64/lib/node_modules/npm/lib/utils/spawn.js:24:14)
+9 verbose stack     at emitTwo (events.js:87:13)
+9 verbose stack     at ChildProcess.emit (events.js:172:7)
+9 verbose stack     at maybeClose (internal/child_process.js:827:16)
+9 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)
+10 verbose pkgid [email protected]
+11 verbose cwd /mnt/www/tarns_app/http_file
+12 error Linux 2.6.32-642.3.1.el6.x86_64
+13 error argv "/usr/local/node-v4.4.7-linux-x64/bin/node" "/usr/local/node-v4.4.7-linux-x64/bin/npm" "start"
+14 error node v4.4.7
+15 error npm  v2.15.8
+16 error code ELIFECYCLE
+17 error [email protected] start: `node ./bin/www`
+17 error Exit status 1
+18 error Failed at the [email protected] start script 'node ./bin/www'.
+18 error This is most likely a problem with the http-file-express4.x package,
+18 error not with npm itself.
+18 error Tell the author that this fails on your system:
+18 error     node ./bin/www
+18 error You can get information on how to open an issue for this project with:
+18 error     npm bugs http-file-express4.x
+18 error Or if that isn't available, you can get their info via:
+18 error
+18 error     npm owner ls http-file-express4.x
+18 error There is likely additional logging output above.
+19 verbose exit [ 1, true ]

package.json

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+{
+  "name": "http-file-express4.x",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "archiver": "^1.0.0",
+    "body-parser": "~1.13.2",
+    "cookie-parser": "~1.3.5",
+    "debug": "~2.2.0",
+    "express": "^4.13.4",
+    "highlight.js": "^9.4.0",
+    "jade": "~1.11.0",
+    "marked": "^0.3.5",
+    "morgan": "~1.6.1",
+    "serve-favicon": "~2.3.0"
+  },
+  "description": "之前做的[HTTP浏览](http://moyuyc.github.io/2016/05/28/node-express-jade%E5%AE%9E%E7%8E%B0HTTP%E6%96%87%E4%BB%B6%E6%B5%8F%E8%A7%88%E5%99%A8/)是使用express2.x版本做的...，因为参考书比较旧了。\r 1. `express2.x`中没有`express4.x`中的`res.sendFile()`方法，之前发送文件是使用的`stream.pipe()`方法，导致不支持继续下载，而且用户不能知道下载进度，在线音乐视频播放也不能选择时间跳跃欣赏。`res.sendFile()`方法可以将本地文件以静态资源发送给用户，所有问题迎刃而解。\r 2. 旧版本不支持`java/c/cpp/js/css/html`等代码文件和`md/markdown`文件在线查看，所以进行改进。\r 3. 利用`Bootstrap responsive utils`和`Bootstrap grid system`进行响应式布局。\r 4. 监控`root.txt`文件，改变root后无需重启服务器。\r 5. 去除对`q.js`依赖，使用原生`Promise`",
+  "main": "app.js",
+  "devDependencies": {},
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/moyuyc/http-file-explorer-express4.x.git"
+  },
+  "keywords": [
+    "node",
+    "express",
+    "http-explorer"
+  ],
+  "author": "moyu",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/moyuyc/http-file-explorer-express4.x/issues"
+  },
+  "homepage": "https://github.com/moyuyc/http-file-explorer-express4.x#readme"
+}

public/javascripts/html.js

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+/**
+ * Created by Yc on 2016/6/9.
+ */
+!function () {
+    hljs.initHighlightingOnLoad();
+    var i =document.getElementById('html-show');
+    i.contentWindow.onload = function(){
+        var h= 30+i.contentDocument.body.clientHeight;
+        if(i.clientHeight<h)
+            i.style.height = h+'px';
+    };
+}()

public/javascripts/md.js

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+/**
+ * Created by Yc on 2016/6/9.
+ */
+~function(){
+    marked.setOptions({
+        highlight: function (code) {
+            return hljs.highlightAuto(code).value;
+        }
+    });
+    renderer = new marked.Renderer();
+    var map = {};
+    renderer.heading = function (text, level) {
+        var escapedText = text.toLowerCase();
+        if(!!map[text])
+            escapedText+='-'+map[text]++;
+        else
+            map[text]=1;
+        return '<h' + level + '><a name="' +
+            escapedText +
+            '" class="anchor" href="#' +
+            escapedText +
+            '"><span class="header-link"></span></a>' +
+            text + '</h' + level + '>';
+    };
+}();