Added folder for german translation
This commit is contained in:
digitalcraftsman
59
de/code/src/apps/ch.4.2/main.go
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59
de/code/src/apps/ch.4.2/main.go
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// 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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89
de/code/src/apps/ch.4.2/profile.gtpl
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89
de/code/src/apps/ch.4.2/profile.gtpl
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{{define "profile"}}<!DOCTYPE html>
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<html>
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<style>
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.row{
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display: table-row;
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}
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.cell{
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display: table-cell;
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}
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.required{
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color: red
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}
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</style>
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<body>
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<h2>Profile Setup:</h2>
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<form action="/checkprofile">
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<div class="row">
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<div class="cell"><span class="required">*</span>User Name:</div>
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<div class="cell"><input type="text" name="username" id="username" required/></div>
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</div>
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<div class="row">
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<div class="cell"><span class="required">*</span>Age:</div>
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<div class="cell"><input type="number" min="13" max="130" name="age" id="age" size="3" required/></div>
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</div>
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<div class="row">
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<div class="cell"><span class="required">*</span>Email:</div>
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<div class="cell"><input type="email" name="email" id="email" placeholder="john@example.com" required/></div>
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</div>
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<div class="row">
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<div class="cell"><span class="required">*</span>Birth day:</div>
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<div class="cell">
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<input type="date" name="birthday" id="birthday" placeholder="MM/DD/YYYY" required/>
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</div>
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</div>
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<div class="row">
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<div class="cell">Gender:</div>
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<div class="cell">
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<label for="gender_male">
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Male: <input type="radio" name="gender" value="m" id="gender_male"/>
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</label>
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<label for="gender_female">
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Female: <input type="radio" name="gender" value="f" id="gender_female"/>
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</label>
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<label for="gender_na">
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N/A: <input type="radio" name="gender" value="na" id="gender_na"/>
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</label>
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</div>
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</div>
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<div class="row">
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<div class="cell">Siblings:</div>
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<div class="cell">
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<label for="sibling_male">
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Brother: <input type="checkbox" name="sibling" value="m" id="sibling_male"/>
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</label>
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<label for="sibling_female">
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Sister: <input type="checkbox" name="sibling" value="f" id="sibling_female"/>
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</label>
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</div>
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</div>
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<div class="row">
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<div class="cell">Shirt Size:</div>
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<div class="cell">
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<select id="shirt_size" >
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<option></option>
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<option value="s">Small</option>
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<option value="m">Medium</option>
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<option value="l">Large</option>
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<option value="xl">X-Large</option>
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<option value="xxl">XX-Large</option>
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</select>
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</div>
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</div>
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<div class="row">
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<div class="cell">Chinese Name:</div>
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<div class="cell"><input type="text" name="chineseName" id="chineseName"/></div>
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</div>
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<br/>
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<span class="required">*</span>Required
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<br/>
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<input type="submit" value="Submit" id="submitBtn"/>
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</form>
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<h2>Invalid submissions</h2>
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<ol>{{range .BadLinks}}
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<li><a href="{{index . 0}}">{{index . 1}}</a></li>
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{{end}}
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</ol>
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</body>
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</html>
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{{end}}
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16
de/code/src/apps/ch.4.2/submission.gtpl
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16
de/code/src/apps/ch.4.2/submission.gtpl
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{{define "submission"}}<!DOCTYPE html>
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<html>
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<body>
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{{if .Errors}}
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<h2>Errors:</h2>
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<ol>
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{{range .Errors}}
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<li>{{.}}</li>
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{{end}}
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</ol>
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{{else}}
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Profile successfully submitted.
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{{end}}
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</body>
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</html>
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{{end}}
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175
de/code/src/apps/ch.4.2/validator/main.go
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175
de/code/src/apps/ch.4.2/validator/main.go
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// This file contains all the validators to validate the profile page.
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package validator
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import (
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"errors"
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"fmt"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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"time"
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)
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type ProfilePage struct {
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Form *url.Values
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}
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type Errors struct {
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Errors []error
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}
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// Goes through the form object and validates each element.
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// Attachs an error to the output if validation fails.
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func (p *ProfilePage) GetErrors() Errors {
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errs := make([]error, 0, 10)
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if *p.Form == nil || len(*p.Form) < 1 {
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errs = append(errs, errors.New("No data was received. Please submit from the profile page."))
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}
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for name, val := range *p.Form {
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if fn, ok := stringValidator[name]; ok {
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if err := fn(strings.Join(val, "")); err != nil {
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errs = append(errs, err)
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}
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} else {
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if fn, ok := stringsValidator[name]; ok {
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if err := fn(val); err != nil {
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errs = append(errs, err)
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}
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}
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}
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}
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return Errors{errs}
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}
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const (
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// Used for parsing the time
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mmddyyyyForm = "01/02/2006" // we want the date sent in this format
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yyyymmddForm = "2006-01-02" // However, HTML5 pages send the date in this format
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)
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var stringValidator map[string]func(string) error = map[string]func(string) error{
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// parameter name : validator reference
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"age": checkAge,
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"birthday": checkDate,
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"chineseName": checkChineseName,
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"email": checkEmail,
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"gender": checkGender,
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"shirtsize": checkShirtSize,
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"username": checkUsername,
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}
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var stringsValidator map[string]func([]string) error = map[string]func([]string) error{
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// parameter name : validator reference
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"sibling": checkSibling,
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}
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// Returns true if slices have a common element
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func doSlicesIntersect(s1, s2 []string) bool {
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if s1 == nil || s2 == nil {
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return false
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}
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for _, str := range s1 {
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if isElementInSlice(str, s2) {
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return true
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}
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}
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return false
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}
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func isElementInSlice(str string, sl []string) bool {
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if sl == nil || str == "" {
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return false
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}
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for _, v := range sl {
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if v == str {
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return true
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}
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}
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return false
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}
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// Checks if all the characters are chinese characters. Won't check if empty.'
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func checkChineseName(str string) error {
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if str != "" {
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if m, _ := regexp.MatchString("^[\\x{4e00}-\\x{9fa5}]+$", strings.Trim(str, " ")); !m {
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return errors.New("Please make sure that the chinese name only contains chinese characters.")
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}
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}
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return nil
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}
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// Checks if a user name exist.
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func checkUsername(str string) error {
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if strings.Trim(str, " ") == "" {
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return errors.New("Please enter a username.")
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}
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return nil
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}
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// Check if age is a number and between 13 and 130
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func checkAge(str string) error {
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age, err := strconv.Atoi(str)
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if str == "" || err != nil {
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return errors.New("Please enter a valid age.")
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}
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if age < 13 {
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return errors.New("You must be at least 13 years of age to submit.")
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}
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if age > 130 {
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return errors.New("You're too old to register, grandpa.")
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}
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return nil
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}
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func checkEmail(str string) error {
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if m, err := regexp.MatchString(`^[^@]+@[^@]+$`, str); !m {
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fmt.Println("err = ", err)
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return errors.New("Please enter a valid email address.")
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}
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return nil
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}
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// Checks if a valid date was passed.
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func checkDate(str string) error {
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_, err := time.Parse(mmddyyyyForm, str)
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if err != nil {
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_, err = time.Parse(yyyymmddForm, str)
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}
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if str == "" || err != nil {
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return errors.New("Please enter a valid Date.")
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}
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return nil
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}
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// Checks if the passed input is a known gender option
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func checkGender(str string) error {
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if str == "" {
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return nil
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}
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siblings := []string{"m", "f", "na"}
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if !isElementInSlice(str, siblings) {
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return errors.New("Please select a valid gender.")
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}
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return nil
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}
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// Check if all the values are known options.
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func checkSibling(strs []string) error {
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if strs == nil || len(strs) < 1 {
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return nil
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}
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siblings := []string{"m", "f"}
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if siblings != nil && !doSlicesIntersect(siblings, strs) {
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return errors.New("Please select a valid sibling")
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}
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return nil
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}
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// Checks if the shirt size is a known option.
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func checkShirtSize(str string) error {
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if str == "" {
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return nil
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}
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shirts := []string{"s", "m", "l", "xl", "xxl"}
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if !isElementInSlice(str, shirts) {
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return errors.New("Please select a valid shirt size")
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}
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return nil
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}
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