AbstractHttpServlet (Groovy 5.0.0-SNAPSHOT)

groovy.servlet.AbstractHttpServlet

All Implemented Interfaces and Traits:

ResourceConnector
```
public abstract class AbstractHttpServlet
extends jakarta.servlet.http.HttpServlet
implements ResourceConnector
```
A base class dealing with common HTTP servlet API housekeeping aspects.

Resource name mangling (pattern replacement)

Also implements Groovy's ResourceConnector in a dynamic manner. It allows you to modify the resource name that is searched for with a replace all operation. See Pattern and Matcher for details. The servlet init parameter names are:
```
 {value:
#INIT_PARAM_RESOURCE_NAME_REGEX} = empty - defaults to null
 resource.name.replacement = empty - defaults to null
 resource.name.replace.all = true (default) | false means replaceFirst()
 
```
Note: If you specify a regex, you have to specify a replacement string too! Otherwise an exception gets raised.

Logging and bug-hunting options

This implementation provides a verbosity flag switching log statements. The servlet init parameter name is:
```
 verbose = false(default) | true
 
```
In order to support class-loading-troubles-debugging with Tomcat 4 or higher, you can log the class loader responsible for loading some classes. See GROOVY-861 for details. The servlet init parameter name is:
```
 log.GROOVY861 = false(default) | true
 
```
If you experience class-loading-troubles with Tomcat 4 (or higher) or any other servlet container using custom class loader setups, you can fall back to use (slower) reflection in Groovy's MetaClass implementation. Please contact the dev team with your problem! Thanks. The servlet init parameter name is:
```
 reflection = false(default) | true
 
```

Field Summary

Fields
Modifiers	Name	Description
`static String`	`CONTENT_TYPE_TEXT_HTML`	Content type of the HTTP response.
`static String`	`INC_PATH_INFO`	Servlet API include key name: path_info
`static String`	`INC_REQUEST_URI`
`static String`	`INC_SERVLET_PATH`	Servlet API include key name: servlet_path
`static String`	`INIT_PARAM_RESOURCE_NAME_REGEX`
`static String`	`INIT_PARAM_RESOURCE_NAME_REGEX_FLAGS`
`protected String`	`encoding`	Encoding to use, becomes charset part of contentType.
`protected String`	`namePrefix`	a.fink: it was in removeNamePrefix, but was extracted to var for optimization
`protected boolean`	`reflection`	Mirrors the static value of the reflection flag in MetaClass.
`protected Pattern`	`resourceNamePattern`	Either `null` or a compiled pattern read from "{ value: #INIT_PARAM_RESOURCE_NAME_REGEX}" and used in AbstractHttpServlet.getScriptUri.
`protected boolean`	`resourceNameReplaceAll`	The replace method to use on the matcher.
`protected String`	`resourceNameReplacement`	The replacement used by the resource name matcher.
`protected jakarta.servlet.ServletContext`	`servletContext`	Servlet (or the web application) context.
`protected boolean`	`verbose`	Controls almost all log output.

Inherited fields
Fields inherited from class	Fields
`class jakarta.servlet.http.HttpServlet`	`LEGACY_DO_HEAD`

Constructor Summary

Constructors
Constructor and description
`AbstractHttpServlet()` Initializes all fields with default values.

Methods Summary

Methods
Type Params	Return Type	Name and description
	`protected String`	`applyResourceNameMatcher(String uri)`
	`protected void`	`generateNamePrefixOnce()`
	`public URLConnection`	`getResourceConnection(String name)` Interface method for ResourceContainer.
	`protected String`	`getScriptUri(jakarta.servlet.http.HttpServletRequest request)` Returns the include-aware uri of the script or template file.
	`protected File`	`getScriptUriAsFile(jakarta.servlet.http.HttpServletRequest request)` Parses the http request for the real script or template source file.
	`public void`	`init(jakarta.servlet.ServletConfig config)` Overrides the generic init method to set some debug flags.
	`protected String`	`removeNamePrefix(String name)`
	`protected void`	`setVariables(ServletBinding binding)` Override this method to set your variables to the Groovy binding.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class jakarta.servlet.http.HttpServlet`	jakarta.servlet.http.HttpServlet#init(jakarta.servlet.ServletConfig), jakarta.servlet.http.HttpServlet#service(jakarta.servlet.ServletRequest, jakarta.servlet.ServletResponse), jakarta.servlet.http.HttpServlet#getServletContext(), jakarta.servlet.http.HttpServlet#getInitParameter(java.lang.String), jakarta.servlet.http.HttpServlet#getInitParameterNames(), jakarta.servlet.http.HttpServlet#getServletConfig(), jakarta.servlet.http.HttpServlet#getServletInfo(), jakarta.servlet.http.HttpServlet#getServletName(), jakarta.servlet.http.HttpServlet#log(java.lang.String), jakarta.servlet.http.HttpServlet#log(java.lang.String, java.lang.Throwable), jakarta.servlet.http.HttpServlet#init(), jakarta.servlet.http.HttpServlet#destroy(), jakarta.servlet.http.HttpServlet#wait(long, int), jakarta.servlet.http.HttpServlet#wait(), jakarta.servlet.http.HttpServlet#wait(long), jakarta.servlet.http.HttpServlet#equals(java.lang.Object), jakarta.servlet.http.HttpServlet#toString(), jakarta.servlet.http.HttpServlet#hashCode(), jakarta.servlet.http.HttpServlet#getClass(), jakarta.servlet.http.HttpServlet#notify(), jakarta.servlet.http.HttpServlet#notifyAll()

- Field Detail
  - public static final String CONTENT_TYPE_TEXT_HTML
    
    Content type of the HTTP response.
  - public static final String INC_PATH_INFO
    
    Servlet API include key name: path_info
  - public static final String INC_REQUEST_URI
  - public static final String INC_SERVLET_PATH
    
    Servlet API include key name: servlet_path
  - public static final String INIT_PARAM_RESOURCE_NAME_REGEX
  - public static final String INIT_PARAM_RESOURCE_NAME_REGEX_FLAGS
  - protected String encoding
    
    Encoding to use, becomes charset part of contentType.
  - protected String namePrefix
    
    a.fink: it was in removeNamePrefix, but was extracted to var for optimization
  - protected boolean reflection
    
    Mirrors the static value of the reflection flag in MetaClass. See AbstractHttpServlet#logGROOVY861
  - protected Pattern resourceNamePattern
    
    Either null or a compiled pattern read from "{
    value:
    #INIT_PARAM_RESOURCE_NAME_REGEX}" and used in AbstractHttpServlet.getScriptUri.
  - protected boolean resourceNameReplaceAll
    
    The replace method to use on the matcher.
```
 true - replaceAll(resourceNameReplacement); (default)
 false - replaceFirst(resourceNameReplacement);
 
```
  - protected String resourceNameReplacement
    
    The replacement used by the resource name matcher.
  - protected jakarta.servlet.ServletContext servletContext
    
    Servlet (or the web application) context.
  - protected boolean verbose
    
    Controls almost all log output.
- Constructor Detail
  - public AbstractHttpServlet()
    
    Initializes all fields with default values.
- Method Detail
  - protected String applyResourceNameMatcher(String uri)
  - protected void generateNamePrefixOnce()
  - @Override
    public URLConnection getResourceConnection(String name)
    
    Interface method for ResourceContainer. This is used by the GroovyScriptEngine.
  - protected String getScriptUri(jakarta.servlet.http.HttpServletRequest request)
    
    Returns the include-aware uri of the script or template file.
    Parameters:
    request - the http request to analyze
    Returns:
    the include-aware uri either parsed from request attributes or hints provided by the servlet container
  - protected File getScriptUriAsFile(jakarta.servlet.http.HttpServletRequest request)
    
    Parses the http request for the real script or template source file.
    Parameters:
    request - the http request to analyze
    Returns:
    a file object using an absolute file path name, or null if the servlet container cannot translate the virtual path to a real path for any reason (such as when the content is being made available from a .war archive).
  - @Override
    public void init(jakarta.servlet.ServletConfig config)
    
    Overrides the generic init method to set some debug flags.
    throws:
    ServletException if init() method defined in super class javax.servlet.GenericServlet throws it
    
    Parameters:
    config - the servlet configuration provided by the container
  - protected String removeNamePrefix(String name)
  - protected void setVariables(ServletBinding binding)
    
    Override this method to set your variables to the Groovy binding.
    All variables bound the binding are passed to the template source text, e.g. the HTML file, when the template is merged.
    The binding provided by TemplateServlet does already include some default variables. As of this writing, they are (copied from ServletBinding):
    - "request" : HttpServletRequest
    - "response" : HttpServletResponse
    - "context" : ServletContext
    - "application" : ServletContext
    - "session" : request.getSession(false)
    And via implicit hard-coded keywords:
    - "out" : response.getWriter()
    - "sout" : response.getOutputStream()
    - "html" : new MarkupBuilder(response.getWriter())
    The binding also provides convenient methods:
    - "forward(String path)" : request.getRequestDispatcher(path).forward(request, response);
    - "include(String path)" : request.getRequestDispatcher(path).include(request, response);
    - "redirect(String location)" : response.sendRedirect(location);
    Example binding all servlet context variables:
```
 class MyServlet extends TemplateServlet {

   protected void setVariables(ServletBinding binding) {
     // Bind a simple variable
     binding.setVariable("answer", new Long(42));

     // Bind all servlet context attributes...
     ServletContext context = (ServletContext) binding.getVariable("context");
     Enumeration enumeration = context.getAttributeNames();
     while (enumeration.hasMoreElements()) {
       String name = (String) enumeration.nextElement();
       binding.setVariable(name, context.getAttribute(name));
     }
   }
 }
 
```
    Parameters: binding - to be modified






    

    

    
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[Java] Class AbstractHttpServlet

Resource name mangling (pattern replacement)

Logging and bug-hunting options

Field Summary

Constructor Summary

Methods Summary

Inherited Methods Summary

Field Detail

public static final String CONTENT_TYPE_TEXT_HTML

public static final String INC_PATH_INFO

public static final String INC_REQUEST_URI

public static final String INC_SERVLET_PATH

public static final String INIT_PARAM_RESOURCE_NAME_REGEX

public static final String INIT_PARAM_RESOURCE_NAME_REGEX_FLAGS

protected String encoding

protected String namePrefix

protected boolean reflection

protected Pattern resourceNamePattern

protected boolean resourceNameReplaceAll

protected String resourceNameReplacement

protected jakarta.servlet.ServletContext servletContext

protected boolean verbose

Constructor Detail

public AbstractHttpServlet()

Method Detail

protected String applyResourceNameMatcher(String uri)

protected void generateNamePrefixOnce()

@Override
public URLConnection getResourceConnection(String name)

protected String getScriptUri(jakarta.servlet.http.HttpServletRequest request)

protected File getScriptUriAsFile(jakarta.servlet.http.HttpServletRequest request)

@Override
public void init(jakarta.servlet.ServletConfig config)

protected String removeNamePrefix(String name)

protected void setVariables(ServletBinding binding)

[Java] Class AbstractHttpServlet

Resource name mangling (pattern replacement)

Logging and bug-hunting options

Field Summary

Constructor Summary

Methods Summary

Inherited Methods Summary

Field Detail

public static final String CONTENT_TYPE_TEXT_HTML

public static final String INC_PATH_INFO

public static final String INC_REQUEST_URI

public static final String INC_SERVLET_PATH

public static final String INIT_PARAM_RESOURCE_NAME_REGEX

public static final String INIT_PARAM_RESOURCE_NAME_REGEX_FLAGS

protected String encoding

protected String namePrefix

protected boolean reflection

protected Pattern resourceNamePattern

protected boolean resourceNameReplaceAll

protected String resourceNameReplacement

protected jakarta.servlet.ServletContext servletContext

protected boolean verbose

Constructor Detail

public AbstractHttpServlet()

Method Detail

protected String applyResourceNameMatcher(String uri)

protected void generateNamePrefixOnce()

@Overridepublic URLConnection getResourceConnection(String name)

protected String getScriptUri(jakarta.servlet.http.HttpServletRequest request)

protected File getScriptUriAsFile(jakarta.servlet.http.HttpServletRequest request)

@Overridepublic void init(jakarta.servlet.ServletConfig config)

protected String removeNamePrefix(String name)

protected void setVariables(ServletBinding binding)

@Override
public URLConnection getResourceConnection(String name)

@Override
public void init(jakarta.servlet.ServletConfig config)