I expected URLs to be URL encoded, not HTML encoded. Nonetheless, I cannot
find any facts on how URLs should be encoded inside HTML, so maybe I am
wrong.
The problem occured, when I used a HTML-encoded URL inside JavaScript.
There, the URL will not be decoded before its sent to the server. When used
in a form however, the browser will decode the URL before sending it.
2018-07-19 1:38 GMT+02:00 Stan Silvert <ssilvert(a)redhat.com>:
On 7/18/2018 2:37 AM, Felix Meißner wrote:
> Hi all,
>
> I just discovered that the action url of the login-form seems to get HTML
> encoded and I woundered, if thats a bug or a feature.
It's a security feature. We take advantage of FreeMarker's "escape by
default" feature. As you discovered, you can use ?no_esc to turn this off.
I'm kind of interested in why fetch() didn't work. The escaped version
should be valid as a URL.
>
> In
>
https://github.com/keycloak/keycloak/blob/4.1.0.Final/
themes/src/main/resources/theme/base/login/login.ftl
> you can see the following line:
>
> <form id="kc-form-login" onsubmit="login.disabled = true; return
true;"
> action="${url.loginAction}" method="post">
>
> On my instance, this resolves to something similar to this:
>
> <form id="kc-form-login" onsubmit="login.disabled = true; return
true;"
> action="
>
https://xx.xx.xx.xx:8443/auth/realms/master/login-actions/
authenticate?session_code=tyvLn2J3QkM4YJhPzjYKnNLSG4ej89
Xabvspm7nmubc&execution=5c933fb0-b637-4462-a603-
bf9ffb601220&client_id=security-admin-console&tab_id=2tJInt2M5NE"
> method="post">
>
> All "&" are encoded as &. This became an issue for me, when I
tried
to
> call the url via JavaScripts fetch method. With the same URL, I got a
> sevrer error. When changing the URL to:
>
> fetch("${url.loginAction?no_esc}", ...)
>
> it finally worked.
>
> Shouldn't all form-urls and href-urls not be escacped? What makes me
wonder
> is, that the same URL just works for regular post requests! For
> documentation on escaping you can find more information here:
>
https://freemarker.apache.org/docs/dgui_quickstart_template.
html#dgui_quickstart_template_autoescaping
>
> Greetings,
> Felix
>
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