Golang HTTP POST handling
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Sankar
Feb 20, 2018, 11:16:57 AM2/20/18
to golang-nuts
Hi,
I have a Golang HTTP server which is consumed by mobile Apps via HTTP.
For one workflow (reset-password) alone, I needed a web interface. So instead of creating a new different webapp, I decided to make an endpoint emit text/html instead of JSON and then serve a static HTML page, which will then do a POST request.
The same endpoint will serve HTML on HTTP GET and will process the values in HTTP POST.
However, I am not able to get the POST parameters in my HTTP request. Even after a succesful req.ParseForm, my req.Form returns nil.
I have attached the complete example.go file in the file, which you can run offline. The relevant code section is:
func alterPasswordHandler(res http.ResponseWriter, req *http.Request) {
if req.Method == http.MethodGet {
body := `
<html>
<body>
<form method="post">
<label for="password">Password</label>
<input id="password" type="password" placeholder="Password" required>
<label for="repeatPassword">Repeat Password</label>
<input id="repeatPassword" type="password" placeholder="Repeat Password" required>
<button type="submit">Change Password</button>
</form>
</body>
</html>
`
res.WriteHeader(http.StatusOK)
res.Header().Set("Content-Type", "text/html")
res.Write([]byte(body))
} else if req.Method == http.MethodPost {
err := req.ParseForm()
log.Println(err, req.Form) // <<<<<<<<<<< req.Form is nil
}
}
What am I doing wrong ? I do get the POST request but without the password fields as part of the POST body. Any help ?
Thanks.
Message has been deleted
matthe...@gmail.com
Feb 20, 2018, 11:30:04 AM2/20/18
to golang-nuts
This worked for me in a project. My form is <form action=“” method=“post”> and the input is <input type=“password” name=“password”/>. On the server I use r.ParseForm then r.FormValue("password").
Matt
Sankar P
Feb 20, 2018, 11:34:47 AM2/20/18
to matthe...@gmail.com, golang-nuts
Perfect. Thanks. This is what I wanted. I just replaced id with name and it started working.
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Andrew Watson
Feb 20, 2018, 6:01:09 PM2/20/18
to golang-nuts
You should, of course, consider adding some rigor such as CSRF protection to that form! I'd suggest something like http://www.gorillatoolkit.org/pkg/csrf for that!
Sankar P
Feb 20, 2018, 10:21:49 PM2/20/18
to Andrew Watson, golang-nuts
Thanks. Will do.
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