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@ -1,9 +1,11 @@ |
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package main |
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import ( |
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"errors" |
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"fmt" |
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"log" |
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"net/http" |
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"regexp" |
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) |
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func main() { |
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@ -22,6 +24,20 @@ func notFound(w http.ResponseWriter, req *http.Request) { |
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} |
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func userProfile(w http.ResponseWriter, req *http.Request) { |
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userID := req.URL.Path[len("/user/"):] |
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userID, err := getID(w, req) |
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if err != nil { |
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return |
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} |
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fmt.Fprintf(w, "User Profile: %q", userID) |
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} |
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var validPath = regexp.MustCompile("^/(user)/([0-9]+)$") |
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func getID(w http.ResponseWriter, req *http.Request) (string, error) { |
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m := validPath.FindStringSubmatch(req.URL.Path) |
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if m == nil { |
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http.NotFound(w, req) |
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return "", errors.New("Invalid ID") |
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} |
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return m[2], nil // The ID is the second subexpression.
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} |
