[英]Express, expand variable in static file
I am using express on a nodejs platform and serve my javascript library files using this directive 我在nodejs平台上使用express并使用此指令提供我的javascript库文件
app.use('/static', express.static(__dirname + '/static'))
Now I want to be able to write something like that, inside one of these static files 现在,我希望能够在这些静态文件之一中编写类似的内容
[..] var host = <%= host %> [..]
Is there any possibility to expand variables inside statically served files? 是否有可能在静态提供的文件中扩展变量?
Here's an idea you might want to refine: 这是您可能需要改进的一个想法:
var ejs = require('ejs');
//Express.js setup
...
app.use('/public/js/myfile.js', function(req, res){
var f = ejs.compile('var host = <%= hostname %>;');
var fileContent = f({hostname: 'somevalue'});
res.setHeader('Content-Type', 'application/javascript');
res.setHeader('Content-Length', fileContent.length);
res.send(fileContent);
});
app.use(express.static(path.join(__dirname, 'public')));
//Routes definition
...
I used ejs since that's what you already use. 我使用了ejs,因为那是您已经使用的。 So the idea is to have a middleware that catches requests to those "dynamic" javascript files, and use the template engine to compile the content. 因此,这个想法是要有一个中间件来捕获对那些“动态” javascript文件的请求,并使用模板引擎来编译内容。
Note that I use a simple string variable here, but you could read the file from disk and then compile it. 请注意,我在这里使用了一个简单的字符串变量,但是您可以从磁盘读取文件,然后进行编译。
Cheers 干杯
您可以使用loDash的模板使用与快递lodashinexpress 。
Please see my answer here: https://stackoverflow.com/a/19812753/2728686 请在这里查看我的答案: https : //stackoverflow.com/a/19812753/2728686
Using the Jade templating engine you can serve static files and send serverside javascript variables to the static HTML files (or to any jade templates), as such: 使用Jade模板引擎,您可以提供静态文件, 并将服务器端javascript变量发送到静态HTML文件 (或任何jade模板),例如:
Server side (server.js): 服务器端(server.js):
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.get('/', ensureAuthenticated, function(request, response){
response.render('index', { data: {currentUser: request.user.id} });
});
app.use(express.static(__dirname + '/www'));
views/index.jade: views / index.jade:
!!! 5
script(type='text/javascript')
var local_data =!{JSON.stringify(data)}
include ../www/index.html
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