E573 minor #8192 Reworded the article about form login redirects (javiereg… · symfony/symfony-docs@bd74006 · GitHub
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minor #8192 Reworded the article about form login redirects (javiereguiluz)
This PR was squashed before being merged into the 2.7 branch (closes #8192). Discussion ---------- Reworded the article about form login redirects Now that form login redirects have been fully fixed (see symfony/symfony#23580) I thought about updating this article, specially its structure. All changes are simple rewordings, except this one: previously, the article said that you can use a Symfony route name as the value of the `_target_path` parameter in the query string or the hidden form field. But if you check the code of this feature, it looks like you can't because we use the value of that parameter "as is" to redirect, so it must be a relative/absolute URL, right? ```php protected function determineTargetUrl(Request $request) { if ($this->options['always_use_default_target_path']) { return $this->options['default_target_path']; } // We redirect directly to the value of the parameter, so it can't be a route name, right ???? if ($targetUrl = $request->get($this->options['target_path_parameter'], null, true)) { return $targetUrl; } // ... } ``` Commits ------- 5015723 Reworded the article about form login redirects
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‎security/form_login.rst‎

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.. index::
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single: Security; Customizing form login
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single: Security; Customizing form login redirect
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How to Customize your Form Login
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================================
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How to Customize Redirect After Form Login
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==========================================
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Using a :doc:`form login </security/form_login_setup>` for authentication
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is a common, and flexible, method for handling authentication in Symfony.
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Pretty much every aspect of the form login can be customized. The full, default
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configuration is shown in the next section.
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Form Login Configuration Reference
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----------------------------------
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To see the full form login configuration reference, see
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:doc:`/reference/configuration/security`. Some of the more interesting options
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are explained below.
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Using a :doc:`form login </security/form_login_setup>` for authentication is a
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common, and flexible, method for handling authentication in Symfony. This
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article explains how to customize the URL which the user is redirected to after
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a successful or failed login. Check out the full
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:doc:`form login configuration reference </reference/configuration/security>` to
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learn of the possible customization options.
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Redirecting after Success
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-------------------------
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You can change where the login form redirects after a successful login using
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the various config options. By default the form will redirect to the URL the
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user requested (i.e. the URL which triggered the login form being shown).
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For example, if the user requested ``http://www.example.com/admin/post/18/edit``,
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then after they successfully log in, they will eventually be sent back to
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``http://www.example.com/admin/post/18/edit``.
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This is done by storing the requested URL in the session.
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If no URL is present in the session (perhaps the user went
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directly to the login page), then the user is redirected to the default page,
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which is ``/`` (i.e. the homepage) by default. You can change this behavior
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in several ways.
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By default, the form will redirect to the URL the user requested (i.e. the URL
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which triggered the login form being shown). For example, if the user requested
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``http://www.example.com/admin/post/18/edit``, then after they have successfully
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logged in, they will be sent back to ``http://www.example.com/admin/post/18/edit``.
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This is done by storing the requested URL in the session. If no URL is present
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in the session (perhaps the user went directly to the login page), then the user
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is redirected to ``/`` (i.e. the homepage). You can change this behavior in
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several ways.
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.. note::
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As mentioned, by default the user is redirected back to the page originally
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requested. Sometimes, this can cause problems, like if a background Ajax
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request "appears" to be the last visited URL, causing the user to be
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redirected there. For information on controlling this behavior, see
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:doc:`/security/target_path`.
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Sometimes, redirecting to the originally requested page can cause problems,
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like if a background Ajax request "appears" to be the last visited URL,
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causing the user to be redirected there. For information on controlling this
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behavior, see :doc:`/security/target_path`.
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Changing the default Page
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~~~~~~~~~~~~~~~~~~~~~~~~~
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First, the default page can be set (i.e. the page the user is redirected to
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if no previous page was stored in the session). To set it to the
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``default_security_target`` route use the following config:
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Define the ``default_security_target`` option to change the page where the user
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is redirected to if no previous page was stored in the session. The value can be
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a relative/absolute URL or a Symfony route name:
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.. configuration-block::
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@@ -58,7 +50,7 @@ if no previous page was stored in the session). To set it to the
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main:
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form_login:
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# ...
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default_target_path: default_security_target
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default_target_path: after_login_route_name
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.. code-block:: xml
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@@ -74,7 +66,7 @@ if no previous page was stored in the session). To set it to the
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<!-- ... -->
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<firewall name="main">
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<form-login default-target-path="default_security_target" />
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<form-login default-target-path="after_login_route_name" />
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</firewall>
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</config>
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</srv:container>
@@ -91,21 +83,17 @@ if no previous page was stored in the session). To set it to the
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'form_login' => array(
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// ...
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'default_target_path' => 'default_security_target',
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'default_target_path' => 'after_login_r C02E oute_name',
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),
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),
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),
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));
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Now, when no URL is set in the session, users will be sent to the
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``default_security_target`` route.
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Always Redirect to the default Page
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You can make it so that users are always redirected to the default page regardless
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of what URL they had requested previously by setting the
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``always_use_default_target_path`` option to true:
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Define the ``always_use_default_target_path`` boolean option to ignore the
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previously requested URL and always redirect to the default page:
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.. configuration-block::
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@@ -159,12 +147,52 @@ of what URL they had requested previously by setting the
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),
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));
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.. _control-the-redirect-url-from-inside-the-form:
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Control the Redirect Using Request Parameters
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The URL to redirect after the login can be defined using the ``_target_path``
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parameter of GET and POST requests. Its value must be a relative or absolute
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URL, not a Symfony route name.
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Defining the redirect URL via GET using a query string parameter:
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.. code-block:: text
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http://example.com/some/path?_target_path=/dashboard
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Defining the redirect URL via POST using a hidden form field:
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.. configuration-block::
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.. code-block:: html+twig
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{# app/Resources/views/security/login.html.twig #}
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<form action="{{ path('login') }}" method="post">
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{# ... #}
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<input type="hidden" name="_target_path" value="{{ path('account') }}" />
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<input type="submit" name="login" />
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</form>
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.. code-block:: html+php
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<!-- app/Resources/views/security/login.html.php -->
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<form action="<?php echo $view['router']->generate('login') ?>" method="post">
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// ...
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<input type="hidden" name="_target_path" value="<?php echo $view['router']->generate('account') ?>" />
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<input type="submit" name="login" />
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</form>
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Using the Referring URL
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~~~~~~~~~~~~~~~~~~~~~~~
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In case no previous URL was stored in the session, you may wish to try using
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the ``HTTP_REFERER`` instead, as this will often be the same. You can do
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this by setting ``use_referer`` to true (it defaults to false):
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In case no previous URL was stored in the session and no ``_target_path``
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parameter is included in the request, you may use the value of the
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``HTTP_REFERER`` header instead, as this will often be the same. Define the
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``use_referer`` boolean option to enable this behavior:
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.. configuration-block::
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@@ -218,12 +246,19 @@ this by setting ``use_referer`` to true (it defaults to false):
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),
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));
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Redirecting on Login Failure
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. note::
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The referrer URL is only used when it is different from the URL generated by
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the ``login_path`` route to avoid a redirection loop.
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.. _redirecting-on-login-failure:
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Redirecting after Failure
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-------------------------
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After a failed login (e.g. an invalid username or password was submitted), the
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user is redirected back to the login form itself. Use the ``failure_path``
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option to define the route or URL the user is redirected to:
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option to define a new target via a relative/absolute URL or a Symfony route name:
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.. configuration-block::
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@@ -238,7 +273,7 @@ option to define the route or URL the user is redirected to:
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# ...
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form_login:
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# ...
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failure_path: login_failure
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failure_path: login_failure_route_name
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.. code-block:: xml
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@@ -255,7 +290,7 @@ option to define the route or URL the user is redirected to:
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<firewall name="main">
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<!-- ... -->
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<form-login failure-path="login_failure" />
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<form-login failure-path="login_failure_route_name" />
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</firewall>
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</config>
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</srv:container>
@@ -271,65 +306,46 @@ option to define the route or URL the user is redirected to:
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// ...
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'form_login' => array(
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// ...
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'failure_path' => 'login_failure',
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'failure_path' => 'login_failure_route_name',
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),
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),
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),
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));
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Control the Redirect URL from inside the Form
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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This option can also be set via the ``_failure_path`` request parameter:
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You can also override where the user is redirected to via the form itself by
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including a hidden field with the name ``_target_path`` for successful logins
285-
and ``_failure_path`` for login errors:
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.. code-block:: text
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http://example.com/some/path?_failure_path=/forgot-password
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.. configuration-block::
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.. code-block:: html+twig
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{# sr B72 c/AppBundle/Resources/views/Security/login.html.twig #}
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{% if error %}
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<div>{{ error.message }}</div> 1004E ;
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{% endif %}
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{# app/Resources/views/security/login.html.twig #}
296326
<form action="{{ path('login') }}" method="post">
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<label for="username">Username:</label>
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<input type="text" id="username" name="_username" value="{{ last_username }}" />
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<label for="password">Password:</label>
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<input type="password" id="password" name="_password" />
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<input type="hidden" name="_target_path" value="account" />
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<input type="hidden" name="_failure_path" value="login" />
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{# ... #}
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329+
<input type="hidden" name="_failure_path" value="{{ path('forgot_password') }}" />
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<input type="submit" name="login" />
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</form>
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.. code-block:: html+php
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<!-- src/AppBundle/Resources/views/Security/login.html.php -->
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<?php if ($error): ?>
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<div><?php echo $error->getMessage() ?></div>
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<?php endif ?>
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<!-- app/Resources/views/security/login.html.php -->
316336
<form action="<?php echo $view['router']->generate('login') ?>" method="post">
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<label for="username">Username:</label>
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<input type="text" id="username" name="_username" value="<?php echo $last_username ?>" />
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<label for="password">Password:</label>
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<input type="password" id="password" name="_password" />
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<input type="hidden" name="_target_path" value="account" />
324-
<input type="hidden" name="_failure_path" value="login" />
337+
<!-- ... -->
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339+
<input type="hidden" name="_failure_path" value="<?php echo $view['router']->generate('forgot_password') ?>" />
326340
<input type="submit" name="login" />
327341
</form>
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Now, the user will be redirected to the value of the hidden form field. The
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value attribute can be a relative path, absolute URL, or a route name.
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The name of the hidden fields in the login form is also configurable using the
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``target_path_parameter`` and ``failure_path_parameter`` options of the firewall.
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Customizing the Target and Failure Request Parameters
344+
-----------------------------------------------------
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346+
The name of the request attributes used to define the success and failure login
347+
redirects can be customized using the ``target_path_parameter`` and
348+
``failure_path_parameter`` options of the firewall that defines the login form.
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.. configuration-block::
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main:
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# ...
345361
form_login:
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target_path_parameter: login_success
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failure_path_parameter: login_fail
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target_path_parameter: go_to
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failure_path_parameter: back_to
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.. code-block:: xml
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@@ -361,8 +377,8 @@ The name of the hidden fields in the login form is also configurable using the
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362378
<firewall name="main">
363379
<!-- ... -->
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<form-login target-path-parameter="login_success" />
365-
<form-login failure-path-parameter="login_fail" />
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<form-login target-path-parameter="go_to" />
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<form-login failure-path-parameter="back_to" />
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</firewall>
367383
</config>
368384
</srv:container>
@@ -377,9 +393,40 @@ The name of the hidden fields in the login form is also configurable using the
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'main' => array(
378394
// ...
379395
'form_login' => array(
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'target_path_parameter' => 'login_success',
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'failure_path_parameter' => 'login_fail',
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'target_path_parameter' => 'go_to',
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'failure_path_parameter' => 'back_to',
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),
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),
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),
385401
));
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403+
Using the above configuration, the query string parameters and hidden form fields
404+
are now fully customized:
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.. code-block:: text
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http://example.com/some/path?go_to=/dashboard&back_to=/forgot-password
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.. configuration-block::
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.. code-block:: html+twig
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{# app/Resources/views/security/login.html.twig #}
415+
<form action="{{ path('login') }}" method="post">
416+
{# ... #}
417+
418+
<input type="hidden" name="go_to" value="{{ path('dashboard') }}" />
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<input type="hidden" name="back_to" value="{{ path('forgot_password') }}" />
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<input type="submit" name="login" />
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</form>
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.. code-block:: html+php
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425+
<!-- app/Resources/views/security/login.html.php -->
426+
<form action="<?php echo $view['router']->generate('login') ?>" method="post">
427+
<!-- ... -->
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429+
<input type="hidden" name="go_to" value="<?php echo $view['router']->generate('dashboard') ?>" />
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<input type="hidden" name="back_to" value="<?php echo $view['router']->generate('forgot_password') ?>" />
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<input type="submit" name="login" />
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</form>

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