60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// Example code for Chapter 4.2 from "Build Web Application with Golang"
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// Purpose: Shows how to perform server-side validation of user input from a form.
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// Also shows to use multiple template files with predefined template names.
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// Run `go run main.go` and then access http://localhost:9090
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package main
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import (
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"apps/ch.4.2/validator"
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"html/template"
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"log"
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"net/http"
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)
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const (
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PORT = "9090"
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HOST_URL = "http://localhost:" + PORT
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)
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var t *template.Template
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type Links struct {
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BadLinks [][2]string
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}
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// invalid links to display for testing.
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var links Links
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func index(w http.ResponseWriter, r *http.Request) {
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http.Redirect(w, r, HOST_URL+"/profile", http.StatusTemporaryRedirect)
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}
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func profileHandler(w http.ResponseWriter, r *http.Request) {
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t.ExecuteTemplate(w, "profile", links)
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}
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func checkProfile(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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p := validator.ProfilePage{&r.Form}
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t.ExecuteTemplate(w, "submission", p.GetErrors())
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}
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// This function is called before main()
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func init() {
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// Note: we can reference the loaded templates by their defined name inside the template files.
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t = template.Must(template.ParseFiles("profile.gtpl", "submission.gtpl"))
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list := make([][2]string, 2)
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list[0] = [2]string{HOST_URL + "/checkprofile", "No data"}
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list[1] = [2]string{HOST_URL + "/checkprofile?age=1&gender=guy&shirtsize=big", "Invalid options"}
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links = Links{list}
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}
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func main() {
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http.HandleFunc("/", index)
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http.HandleFunc("/profile", profileHandler)
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http.HandleFunc("/checkprofile", checkProfile)
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err := http.ListenAndServe(":"+PORT, nil) // setting listening port
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if err != nil {
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log.Fatal("ListenAndServe: ", err)
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}
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}
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