Class HTMLHostManagerServlet
- All Implemented Interfaces:
Servlet,ServletConfig,Serializable,ContainerServlet
The difference between the HostManagerServlet and this Servlet is that this Servlet prints out an HTML
interface which makes it easier to administrate.
However if you use a software that parses the output of HostManagerServlet you won't be able to upgrade
to this Servlet since the output are not in the same format as from HostManagerServlet
- Author:
- Bip Thelin, Malcolm Edgar, Glenn L. Nielsen, Peter Rossbach
- See Also:
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Field Summary
Fields inherited from class org.apache.catalina.manager.host.HostManagerServlet
context, debug, engine, installedHost, sm, wrapperFields inherited from class jakarta.servlet.http.HttpServlet
LEGACY_DO_HEAD -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected Stringadd(HttpServletRequest request, String name, StringManager smClient) Add a host using the specified parameters.voiddoGet(HttpServletRequest request, HttpServletResponse response) Called by the server (via theservicemethod) to allow a servlet to handle a GET request.voiddoPost(HttpServletRequest request, HttpServletResponse response) Called by the server (via theservicemethod) to allow a servlet to handle a POST request.voidlist(HttpServletRequest request, HttpServletResponse response, String message, StringManager smClient) Render an HTML list of the currently active Contexts in our virtual host, and memory and server status information.protected Stringpersist(StringManager smClient) Persist the current configuration to server.xml.protected Stringremove(String name, StringManager smClient) Remove the specified host.protected Stringstart(String name, StringManager smClient) Start the host with the specified name.protected Stringstop(String name, StringManager smClient) Stop the host with the specified name.Methods inherited from class org.apache.catalina.manager.host.HostManagerServlet
add, add, booleanParameter, destroy, getConfigBase, getWrapper, init, list, persist, remove, setWrapper, start, stopMethods inherited from class jakarta.servlet.http.HttpServlet
doDelete, doHead, doOptions, doPut, doTrace, getLastModified, init, service, serviceMethods inherited from class jakarta.servlet.GenericServlet
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, log, log
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Constructor Details
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HTMLHostManagerServlet
public HTMLHostManagerServlet()
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Method Details
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doGet
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException Description copied from class:jakarta.servlet.http.HttpServletCalled by the server (via theservicemethod) to allow a servlet to handle a GET request.Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a GET request that returns no body in the response, only the request header fields.
When overriding this method, read the request data, write the response headers, get the response's Writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a
PrintWriterobject to return the response, set the content type before accessing thePrintWriterobject.The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.
Where possible, set the Content-Length header (with the
ServletResponse.setContentLength(int)method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.When using HTTP 1.1 chunked encoding (which means that the response has a Transfer-Encoding header), do not set the Content-Length header.
The GET method should be safe, that is, without any side effects for which users are held responsible. For example, most form queries have no side effects. If a client request is intended to change stored data, the request should use some other HTTP method.
The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online or modifying data is neither safe nor idempotent.
If the request is incorrectly formatted,
doGetreturns an HTTP "Bad Request" message.- Overrides:
doGetin classHostManagerServlet- Parameters:
request- anHttpServletRequestobject that contains the request the client has made of the servletresponse- anHttpServletResponseobject that contains the response the servlet sends to the client- Throws:
IOException- if an input or output error is detected when the servlet handles the GET requestServletException- if the request for the GET could not be handled- See Also:
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doPost
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException Description copied from class:jakarta.servlet.http.HttpServletCalled by the server (via theservicemethod) to allow a servlet to handle a POST request. The HTTP POST method allows the client to send data of unlimited length to the Web server a single time and is useful when posting information such as credit card numbers.When overriding this method, read the request data, write the response headers, get the response's Writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a
PrintWriterobject to return the response, set the content type before accessing thePrintWriterobject.The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.
Where possible, set the Content-Length header (with the
ServletResponse.setContentLength(int)method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.When using HTTP 1.1 chunked encoding (which means that the response has a Transfer-Encoding header), do not set the Content-Length header.
This method does not need to be either safe or idempotent. Operations requested through POST can have side effects for which the user can be held accountable, for example, updating stored data or buying items online.
If the HTTP POST request is incorrectly formatted,
doPostreturns an HTTP "Bad Request" message.- Overrides:
doPostin classHttpServlet- Parameters:
request- anHttpServletRequestobject that contains the request the client has made of the servletresponse- anHttpServletResponseobject that contains the response the servlet sends to the client- Throws:
ServletException- if the request for the POST could not be handledIOException- if an input or output error is detected when the servlet handles the request- See Also:
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add
Add a host using the specified parameters.- Parameters:
request- The Servlet requestname- Host namesmClient- StringManager for the client's locale- Returns:
- output
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remove
Remove the specified host.- Parameters:
name- Host namesmClient- StringManager for the client's locale- Returns:
- output
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start
Start the host with the specified name.- Parameters:
name- Host namesmClient- StringManager for the client's locale- Returns:
- output
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stop
Stop the host with the specified name.- Parameters:
name- Host namesmClient- StringManager for the client's locale- Returns:
- output
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persist
Persist the current configuration to server.xml.- Parameters:
smClient- i18n resources localized for the client- Returns:
- output
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list
public void list(HttpServletRequest request, HttpServletResponse response, String message, StringManager smClient) throws IOException Render an HTML list of the currently active Contexts in our virtual host, and memory and server status information.- Parameters:
request- The requestresponse- The responsemessage- a message to displaysmClient- StringManager for the client's locale- Throws:
IOException- An IO error occurred
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