When specified by url-regexp , the application will be initialized at the first request. This means that load-on-startup servlets may start later than expected for url-regexp applications. When initializing a web-app, all the tags in the web-app-defaults sections configure the web-app. In other words, the web-app-default value is essentially a macro that is cut-and-pasted before the web-app configuration. The web-apps are named with numeric suffixes, e. When a new version of the web-app is deployed, Resin continues to send current session requests to the previous web-app.
New sessions go to the new web-app version. So users will not be aware of the application upgrade. Specifies a collection of areas of the web site for security purposes. Sets the files to use as when no filename is present in url. Resin 3. Scheduled Tasks. Virtual Hosting. Example: enabling strict-mapping in resin-web.
Example: resin. Resin Documentation home company docs app server. A class that extends AbstractConstraint. If automatic, detects new. The filter's class defaults to filter-name , which extends javax. Initialization parameters, see FilterConfig. A regular expression matching the portion of the url that follows the context path. Set to false to handle invalid. Defines a custom class which extends com. The prefix of the real path. The plugin will send the request to Resin, but Resin will ignore the entry.
Use to get around regexp limitations. Resin 1. The plugin will ignore the request. Use this to define a sub-url the web server should handle, not Resin. Reuse the session id even if the session has timed out. A value of false defeats single signon capabilities. Use one of "java" or "hessian" for serialization, hessian is significantly faster and smaller resin 3.
When to save sessions, one of "before-headers", "after-request", or "on-shutdown". When the web server receives a request for the application, it uses the deployment descriptor to map the URL of the request to the code that ought to handle the request.
The deployment descriptor is a file named web. Here is a simple web. ComingSoonServlet :. The web server uses this configuration to identify the servlet to handle a given request and call the class method that corresponds to the request method.
You can declare multiple servlets using the same class with different initialization parameters. The name for each servlet must be unique across the deployment descriptor. The standard does not support wildcards in the middle of a string, and does not allow multiple wildcards in one pattern. The URL path cannot start with a period.
The servlet can access its initialization parameters by getting its servlet configuration using its own getServletConfig method, then calling the getInitParameter method on the configuration object using the name of the parameter as an argument. For example, if an app has a JSP file named start. An App Engine application can use Google Accounts for user authentication. The app can use the Google Accounts API to detect whether the user is signed in, get the currently signed-in user's email address, and generate sign-in and sign-out URLs.
An app can also specify access restrictions for URL paths based on Google Accounts, using the deployment descriptor. If a user accesses a URL whose path has a security constraint and the user is not signed in, App Engine redirects the user to the Google Accounts sign-in page. Google Accounts redirects the user back to the application URL after successfully signing in or registering a new account. The app does not need to do anything else to ensure that only signed-in users can access the URL.
A security constraint includes an authorization constraint that specifies which Google Accounts users can access the path. If the constraint specifies a user role of admin , then only registered developers of the application can access the URL.
The admin role makes it easy to build administrator-only sections of your site. Secure connections are useful for protecting customer data, such as contact information, passwords, and private messages.
For example:. If you accept the certificate for that domain, pages will load successfully. You can also use an alternate form of the versioned appspot.
Google Accounts sign-in and sign-out are always performed using a secure connection and is unrelated to how the application's URLs are configured. As mentioned above, security constraints apply to static files as well as servlets. This includes the transport guarantee. Google does not issue SSL certificates for double-wildcard domains hosted at appspot. You can use a simple ". The deployment descriptor can specify a list of filenames that the server should try when the user accesses a path that represents a WAR subdirectory that is not already explicitly mapped to a servlet.
The servlet standard calls this the "welcome file list. A filter is a class that acts on a request like a servlet, but can allow the handling of the request to continue with other filters or servlets.
A filter may perform an auxiliary task, such as logging, performing specialized authentication checks, or annotating the request or response objects before calling the servlet.
Filters allow you to compose request processing tasks from the deployment descriptor. A filter class implements the javax. Filter interface, including the doFilter method. Here is a simple filter implementation that logs a message, and passes control down the chain, which may include other filters or a servlet, as described by the deployment descriptor:.
You can also map filters directly to other servlets. You can customize what the server sends to the user when an error occurs, using the deployment descriptor.
The server can display an alternate page location when it's about to send a particular HTTP status code, or when a servlet raises a particular Java exception. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies. Why Google close Discover why leading businesses choose Google Cloud Whether your business is early in its journey or well on its way to digital transformation, Google Cloud can help you solve your toughest challenges.
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Rehost, replatform, rewrite your Oracle workloads. An example of web. The above example is based on the assumption that the value of the following attributes is TestJaxWsService : The serviceName attribute of the javax. Reference note To include cosminexus-jaxws. A value of the serviceName attribute of the javax.
Note The web. This assumption is only applicable when invoking Web Services. Example: The attribute files that can be acquired with the cjgetappprop command do not include the information related to web.
Also, when specifying lax in the webserver.
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