node.js - nodejs 的sails 框架如何修改ejs的后缀为html

问题描述

问题解答

当我们将模板的后缀都改为html的时候，访问页面发现了报错，很明显是后缀配置不正确。

{ 'message': 'Could not render view 'index'. Tried locating view file @ '/Users/sun.huajie/Documents/Workspace/node_sails/myapp/views/index'. Layout configured as 'layout', so tried using layout @ '/Users/sun.huajie/Documents/Workspace/node_sails/myapp/views/layout')', 'code': 'E_VIEW_FAILED', 'status': 500, 'view': { 'name': 'index', 'root': '/Users/sun.huajie/Documents/Workspace/node_sails/myapp/views', 'defaultEngine': 'ejs', 'ext': '.ejs' }}

我去查找了Could not render view这段代码，发现多出来一个节点view，这时候我寻找一个关键字defaultEngine来进行了全文搜索，找到了一处定位。

// view if (!view) { view = new (this.get(’view’))(name, { defaultEngine: this.get(’view engine’), root: this.get(’views’), engines: engines }); . . .

按照上面的代码来看，说明default Engine是从view engine的配置中获取的。那我们再继续搜索view engine。找到如下代码：

// Configure views if hook enabled if (sails.hooks.views) {// TODO: explore handling this differently to avoid potential// timing issues with view engine configurationsails.after(’hook:views:loaded’, function() { var View = require(’./view’); // Use View subclass to allow case-insensitive view lookups expressApp.set(’view’, View); // Set up location of server-side views and their engine expressApp.set(’views’, sails.config.paths.views); // Teach Express how to render templates w/ our configured view extension expressApp.engine(sails.config.views.engine.ext, sails.config.views.engine.fn); // Set default view engine sails.log.verbose(’Setting default Express view engine to ’ + sails.config.views.engine.ext + ’...’); expressApp.set(’view engine’, sails.config.views.engine.ext);});

通过上面的代码我们可以看出 这个view engine实际上是来自sails.config.view.engine.ext的配置，跟我们的配置文件路径一样。

/Users/sun/Documents/Workspace/node_sails/myapp/config/view.js

这个时候我们在这代码里打一个断点

console.info(sails.config);

然后奇妙的事情出现了

... views: { engine: { name: ’ejs’, ext: ’ejs’, fn: [Function] }, layout: ’layout’, partials: false },...

看来这就是对应的配置，但是当我打开这个文件的时候发现里面的engine是这样定义的

engine:’ejs’

wtf！，这是什么情况，为什么格式不对。我以为会是json的字符串。

然后大胆的来调整一下吧

engine: { name:’ejs’, ext:’html’ },

再次输出就得到了正确的配置改变

{ engine: { name: ’ejs’, ext: ’html’, fn: [Function] },

这个时候我们满怀信心重启后刷新页面，却发现了另外一个报错！！！！wtf

Error: ENOENT: no such file or directory, open ’/Users/sun.huajie/Documents/Workspace/node_sails/myapp/views/header.ejs’ at Error (native) at Object.fs.openSync (fs.js:640:18) at fs.readFileSync (fs.js:508:33) at Object.exports.parse (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/node_modules/ejs/lib/ejs.js:160:19) at exports.compile (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/node_modules/ejs/lib/ejs.js:225:15) at Object.exports.render (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/node_modules/ejs/lib/ejs.js:285:10) at Object.exports.renderFile (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/node_modules/ejs/lib/ejs.js:319:20) at module.exports (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/index.js:85:7) at /usr/local/lib/node_modules/sails/node_modules/ejs-locals/index.js:131:7 at Object.exports.renderFile (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/node_modules/ejs/lib/ejs.js:319:3) at SailsView.module.exports [as engine] (/usr/local/lib/node_modules/sails/node_modules/ejs-locals/index.js:85:7) at SailsView.View.render (/usr/local/lib/node_modules/sails/node_modules/express/lib/view.js:76:8) at Function.app.render (/usr/local/lib/node_modules/sails/node_modules/express/lib/application.js:565:10) at ServerResponse.res.render (/usr/local/lib/node_modules/sails/node_modules/express/lib/response.js:845:7) at ServerResponse.res.view (/usr/local/lib/node_modules/sails/lib/hooks/views/res.view.js:284:16) at Object.index (/Users/sun.huajie/Documents/Workspace/node_sails/myapp/api/controllers/UserController.js:36:14) at wrapper (/usr/local/lib/node_modules/sails/node_modules/@sailshq/lodash/lib/index.js:3250:19) at routeTargetFnWrapper (/usr/local/lib/node_modules/sails/lib/router/bind.js:181:5) at callbacks (/usr/local/lib/node_modules/sails/node_modules/express/lib/router/index.js:164:37) at param (/usr/local/lib/node_modules/sails/node_modules/express/lib/router/index.js:138:11) at param (/usr/local/lib/node_modules/sails/node_modules/express/lib/router/index.js:135:11) at pass (/usr/local/lib/node_modules/sails/node_modules/express/lib/router/index.js:145:5)

报错发生了变化，说明刚刚的修改肯定是有作用的。然后这个时候我单独把header的后缀名改回ejs发现，前端页面正常了。看来这个header文件加载的时候，后缀名是程序里面写好的了。

剩下的流程就是判断到底哪儿的问题了，根据报错的执行顺序来找下到底那儿的问题！

if (0 == js.trim().indexOf(’include’)) {var name = js.trim().slice(7).trim();if (!filename) throw new Error(’filename option is required for includes’);var path = resolveInclude(name, filename);include = read(path, ’utf8’);include = exports.parse(include, { filename: path, _with: false, open: open, close: close, compileDebug: compileDebug });buf += '’ + (function(){' + include + '})() + ’';js = ’’; }

定位到上面的代码，发现是path变量除出了问题，导致没有找到。我们打印一下name和filename

header/Users/sun.huajie/Documents/Workspace/node_sails/myapp/views/layout.html

这个时候我们定位到了方法resolveInclude

function resolveInclude(name, filename) { var path = join(dirname(filename), name); var ext = extname(name); if (!ext) path += ’.ejs’; return path;}

看到了吧，说明这个地方是进行拼接了，但是只有在extname返回为空的情况下才会拼接，说明这里的name传递进来的时候是没有携带后缀名的！！！！

所以看到这里基本上明白了，在模板layout.html中，使用了include命令来加载了header

<meta name='viewport' content='width=device-width, initial-scale=1, maximum-scale=1'> <% include header %>

所以我们将这里的header改为header.html然后再重新访问，就正常了。

那你为什么不试试jade模板了，可以直接用原生html写