英文:
Golang gorilla mux not found handler doesn't work correct
问题
我正在写一个网络服务器，我有一个Not Found Handler函数。
所有的Handle函数，如登录、注册、查看页面都正常工作。
我还有这样一行代码：router.NotFoundHandler = http.HandlerFunc(Handlers.NotFoundHandler)
Handlers是我的包，包含以下代码：
func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
//title必须是404.html
title := config.Page404
title = config.WebAppex + title
fmt.Println("title: " + title)
/*这是问题所在的代码行*/
r = http.NewRequest("GET", config.Page404, nil)
fmt.Println(r.URL.Path)
logger.Info("Sending... ", title)
//加载页面
p, err := loadPage(title)
if err != nil {
logger.Error("ERROR : ", err.Error())
p, _ := loadPage(config.Page404)
fmt.Fprintf(w, "%s", p.body) //以奇怪的方式发送HTML页面
return //只是返回，因为要打印dry p.body
}
//提供服务
http.ServeFile(w, r, p.dir)
logger.Info(p.dir, "已发送")
}
所以问题是：如果我尝试访问localhost:8080/nothing，我会得到一个漂亮的Page404页面。
但是如果我访问localhost:8080/nothing/nothing或localhost:8080/nothing/nothing/nothing等等，我会得到一个没有任何CSS的干燥的404.html页面。所以我认为问题是请求，所以我用"/404.html"的方式创建了一个新的请求（它是config.Page404），但是没有任何变化。我读过关于gorilla mux子路由的文章，但它只能帮助排除localhost:8080/nothing，但我需要处理所有情况。所以有没有办法排除所有不存在的页面？
更新：我的loadPage函数：
func loadPage(title string) (*page, error) {
logger.Info("尝试加载", title)
//从title写入body
body, err := ioutil.ReadFile(title)
if err != nil {
return nil, err
}
return &page{dir: config.HOMEDIR + title, body: body}, nil
}
type page struct {
dir string
body []byte
}
谢谢！
英文:
I'm writing a web server and I've got Not Found Handler function.
All the Handle functions like login, registration, view page are working correctly.
I also have such line: router.NotFoundHandler = http.HandlerFunc(Handlers.NotFoundHandler)
Handlers is my package including next code:
func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
//title has to be 404.html
title := config.Page404
title = config.WebAppex + title
fmt.Println("title: " + title)
/*HERE IS QUESTION LINE*/
r = http.NewRequest("GET", config.Page404, nil)
fmt.Println(r.URL.Path)
logger.Info("Sending... ", title)
//load page
p, err := loadPage(title)
if err != nil {
logger.Error("ERROR : ", err.Error())
p, _ := loadPage(config.Page404)
fmt.Fprintf(w, "%s", p.body) //wired way to send HTML page
return //just return because of printing dry p.body
}
//serve it
http.ServeFile(w, r, p.dir)
logger.Info(p.dir, " has been sent")
}
So the problem is: If I try going to localhost:8080/nothing, then I get my nice Page404
But if I go to localhost:8080/nothing/nothing or localhost:8080/nothing/nothing/nothing and etc, I get dry 404.html without any CSS. So I thought that problem is request, so I create new with the way of "/404.html" (it's config.Page404), but nothing changed. I read about gorilla mux Subrouter, bit It may help to exclude only localhost:8080/nothing, but I need all the cases. So is there any ways to exclude all the not existing pages?
UPD: My loadPage function:
func loadPage(title string) (*page, error) {
logger.Info("Trying to load", title)
//writing from title to body
body, err := ioutil.ReadFile(title)
if err != nil {
return nil, err
}
return &page{dir: config.HOMEDIR + title, body: body}, nil
}
type page struct {
dir string
body []byte
}
Thank you!
答案1
得分: 0
你可能是在使用相对路径的方式来提供404页面的CSS样式表路径，当从嵌套页面（如/nothing/nothing/nothing）提供时，这显然会失败。
要么在每个地方使用<base>标签获取绝对链接，要么将你的请求重定向到所需的页面。
英文:
You're probably serving your 404 page with a relative CSS stylesheet path, which will obviously fail when serving it from a nested page like /nothing/nothing/nothing.
Either use the <base> tag to get absolute links everywhere, or redirect your request to the wanted page.
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