英文:
How to serve a file if URL doesn't match to any pattern in Go?
问题
我正在使用Angular 2和Go构建一个单页应用程序，并且在Angular中使用路由。如果我在http://example.com/打开网站，Go将为我提供index.html文件，这很好，因为我写了以下代码：
mux.Handle("/", http.FileServer(http.Dir(mysiteRoot)))
现在我在Angular中有一个路由，比如/posts，如果它是一个默认路由（也就是useAsDefault为true），或者如果我手动访问http://example.com/posts，我将从Go得到一个404错误，这意味着没有为此路径指定处理程序。
我认为为每个Angular路由在Go中创建一个处理程序不是一个好主意，因为可能有很多路由。所以我的问题是，如果请求的URL与我在ServeMux中设置的任何其他模式都不匹配，我该如何在Go中提供index.html呢？
英文:
I'm building a Single Page Application using Angular 2 and Go, and in Angular I use routing. If I open the site at, say, http://example.com/, Go will serve me my index.html file, which is good because I wrote this:
mux.Handle("/", http.FileServer(http.Dir(mysiteRoot)))
Now I have a route in Angular, let's say, /posts, and If it's a default route (that is, when useAsDefault is true) or if I just manually go to http://example.com/posts, I'll get a 404 error from Go, which means that no handler is specified for this path.
I don't think that creating a handler in Go for every single Angular route is a good idea, because there may be a lot of routes. So my question is, how can I serve index.html in Go if the request URL doesn't match any other pattern that I set in my ServeMux?
答案1
得分: 1
好的，以下是翻译好的内容：
嗯，实际上这很容易。net/http文档提到了这一点：
> 需要注意的是，以斜杠结尾的模式表示一个根子树，模式"/"匹配所有未被其他已注册模式匹配的路径，而不仅仅是Path为"/"的URL。
所以我需要对我的"/"处理程序做一些处理。http.FileServer会在模式字符串指定的目录中查找文件，所以我只需将其替换为以下内容：
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, mysiteRoot + "index.html")
})
然后它就可以正常工作了。
英文:
Well, that was pretty easy actually.
The net/http documentation says this:
> Note that since a pattern ending in a slash names a rooted subtree,
> the pattern "/" matches all paths not matched by other registered
> patterns, not just the URL with Path == "/".
So I needed to do something with my "/" handler. http.FileServer looks for files in a directory that is specified in the pattern string, so I just replaced it with this:
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, mysiteRoot + "index.html")
})
And it works just fine.
答案2
得分: 0
我认为你需要在你的Angular2应用中更改URL提供程序的设置，以使用HashLocationStrategy。使用这个设置，你的路由将采用以下形式：
#/posts
并且不会触发你的Golang应用中的任何路由。
英文:
I think you will need to change the URL provider settings in your angular2 app to use HashLocationStrategy. Using this, your routes will be of the form
>#/posts
and will not trigger any route in your golang app.
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