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70 lines
1.6 KiB
70 lines
1.6 KiB
package main
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import (
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"github.com/microcosm-cc/bluemonday"
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"html"
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"net/http"
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"net/url"
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)
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type FormValues map[string][]string
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func FormHandler(w http.ResponseWriter, r *http.Request) {
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if r.Method == http.MethodGet {
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_, _ = w.Write([]byte("MailyGo works!"))
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return
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}
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if r.Method != http.MethodPost {
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w.WriteHeader(http.StatusMethodNotAllowed)
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_, _ = w.Write([]byte("The HTTP method is not allowed, make a POST request"))
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return
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}
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_ = r.ParseForm()
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sanitizedForm := sanitizeForm(r.PostForm)
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go func() {
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if !isBot(sanitizedForm) {
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sendForm(sanitizedForm)
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}
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}()
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sendResponse(sanitizedForm, w)
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return
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}
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func sanitizeForm(values url.Values) FormValues {
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p := bluemonday.StrictPolicy()
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sanitizedForm := make(FormValues)
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for key, values := range values {
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var sanitizedValues []string
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for _, value := range values {
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sanitizedValues = append(sanitizedValues, html.UnescapeString(p.Sanitize(value)))
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}
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sanitizedForm[html.UnescapeString(p.Sanitize(key))] = sanitizedValues
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}
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return sanitizedForm
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}
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func isBot(values FormValues) bool {
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for _, honeyPot := range appConfig.HoneyPots {
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if len(values[honeyPot]) > 0 {
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for _, value := range values[honeyPot] {
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if value != "" {
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return true
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}
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}
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}
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}
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return false
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}
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func sendResponse(values FormValues, w http.ResponseWriter) {
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if len(values["_redirectTo"]) == 1 && values["_redirectTo"][0] != "" {
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w.Header().Add("Location", values["_redirectTo"][0])
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w.WriteHeader(http.StatusSeeOther)
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_, _ = w.Write([]byte("Go to " + values["_redirectTo"][0]))
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return
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} else {
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w.WriteHeader(http.StatusCreated)
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_, _ = w.Write([]byte("Submitted form"))
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return
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}
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}
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