Created
August 21, 2015 22:37
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golang-web-demo
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| <html> | |
| <head> | |
| <title>{{.Title}}</title> | |
| </head> | |
| <body> | |
| <h1>{{.Title}}</h1> | |
| </body> | |
| </html> |
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| package main | |
| import "fmt" | |
| import "net/http" | |
| import "html/template" | |
| var myTemplate, _ = template.ParseFiles("index.html") | |
| // var errTemplate = template.MustParseFile("error.html", nil) | |
| type Page struct { | |
| Title string | |
| Body []byte | |
| } | |
| // takes handler function as parameter | |
| func errorHandler(fn http.HandlerFunc) http.HandlerFunc { | |
| // define anonymous func and return it | |
| return func(w http.ResponseWriter, r *http.Request) { | |
| // define anonymous function and defer its call | |
| defer func(){ | |
| if r, ok := recover().(error); r != nil && !ok { | |
| w.WriteHeader(500) | |
| fmt.Fprintf(w, "Error: %v", r) | |
| } | |
| }() | |
| fn(w, r) | |
| } | |
| } | |
| func handler(w http.ResponseWriter, r *http.Request) { | |
| myTemplate.Execute(w, &Page{Title: r.URL.Path[1:]}) | |
| //fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:]) | |
| } | |
| func main() { | |
| http.HandleFunc("/", errorHandler(handler)) | |
| // http.HandleFunc("/foo", handler2) | |
| fmt.Println("Listening: ...") | |
| http.ListenAndServe(":8080", nil) | |
| } |
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