dap4.servlet

Class DapRequest

java.lang.Object

dap4.servlet.DapRequest

public class DapRequest
extends java.lang.Object

User requests get cached here so that downstream code can access the details of the request information.

Modified by Heimbigner for DAP4.

Field Summary

Fields

Modifier and Type	Field and Description
protected dap4.core.data.ChecksumMode	checksummode
static java.lang.String	CONSTRAINTTAG
protected DapController	controller
protected java.lang.String	controllerpath
protected java.lang.String	datasetpath
static dap4.core.data.ChecksumMode	DEFAULTCSUM
protected dap4.core.util.ResponseFormat	format
protected dap4.dap4lib.RequestMode	mode
protected java.nio.ByteOrder	order
protected java.util.Map<java.lang.String,java.lang.String>	queries
protected java.lang.String	querystring
protected javax.servlet.http.HttpServletRequest	request
static java.lang.String	RESOURCEDIRNAME
protected java.lang.String	resourceroot
protected javax.servlet.http.HttpServletResponse	response
protected java.lang.String	server
protected javax.servlet.ServletContext	servletcontext
protected java.lang.String	url
static java.lang.String	WEBINFPATH

Constructor Summary

Constructors

Constructor and Description
DapRequest(DapController controller, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)

Method Summary

Modifier and Type	Method and Description
dap4.core.data.ChecksumMode	getChecksumMode()
java.lang.String	getControllerPath()
java.lang.String	getDataset()
java.lang.String	getDatasetPath()
dap4.core.util.ResponseFormat	getFormat()
dap4.dap4lib.RequestMode	getMode()
java.nio.ByteOrder	getOrder()
java.lang.String	getOriginalURL()
java.io.OutputStream	getOutputStream()
java.util.Map<java.lang.String,java.lang.String>	getQueries()
javax.servlet.http.HttpServletRequest	getRequest()
java.lang.String	getResourcePath(java.lang.String relpath)
java.lang.String	getResourceRoot()
javax.servlet.http.HttpServletResponse	getResponse()
java.lang.String	getServer()
javax.servlet.ServletContext	getServletContext()
java.lang.String	getURL()
java.lang.String	getURLPath()
protected void	parse() The goal of parse() is to extract info from the underlying HttpRequest and cache it in this object.
java.lang.String	queryLookup(java.lang.String name)
void	setResponseHeader(java.lang.String name, java.lang.String value) Set a request header

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

WEBINFPATH

public static final java.lang.String WEBINFPATH

See Also:

Constant Field Values

RESOURCEDIRNAME

public static final java.lang.String RESOURCEDIRNAME

See Also:

Constant Field Values

CONSTRAINTTAG

public static final java.lang.String CONSTRAINTTAG

See Also:

Constant Field Values

DEFAULTCSUM

public static final dap4.core.data.ChecksumMode DEFAULTCSUM

request

protected javax.servlet.http.HttpServletRequest request

response

protected javax.servlet.http.HttpServletResponse response

url

protected java.lang.String url

querystring

protected java.lang.String querystring

server

protected java.lang.String server

controllerpath

protected java.lang.String controllerpath

datasetpath

protected java.lang.String datasetpath

mode

protected dap4.dap4lib.RequestMode mode

format

protected dap4.core.util.ResponseFormat format

queries

protected java.util.Map<java.lang.String,java.lang.String> queries

controller

protected DapController controller

order

protected java.nio.ByteOrder order

checksummode

protected dap4.core.data.ChecksumMode checksummode

resourceroot

protected java.lang.String resourceroot

servletcontext

protected javax.servlet.ServletContext servletcontext

Constructor Detail

DapRequest

public DapRequest(DapController controller,
                  javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws dap4.core.util.DapException

Throws:

dap4.core.util.DapException

Method Detail

parse

protected void parse()
              throws java.io.IOException

The goal of parse() is to extract info from the underlying HttpRequest and cache it in this object.

In particular, the incoming URL needs to be decomposed into multiple pieces. Certain assumptions are made: 1. every incoming url is of the form (a) http(s)://host:port/d4ts/ or (b) http(s)://host:port/d4ts/?query Case a indicates that the front page is to be returned. Case b indicates a request for a dataset (or dsr), and its value is determined by its extensions. The query may be absent. We want to extract the following pieces. 1. (In URI parlance) The scheme plus the authority: http://host:port 3. The return type: depending on the last extension (e.g. ".txt"). 4. The requested value: depending on the next to last extension (e.g. ".dap"). 5. The suffix path specifying the actual dataset: datasetpath with return and request type extensions removed. 6. The url path = servletpath + datasetpath. 7. The query part.

Throws:

java.io.IOException

getOrder

public java.nio.ByteOrder getOrder()

getResourceRoot

public java.lang.String getResourceRoot()

getChecksumMode

public dap4.core.data.ChecksumMode getChecksumMode()

getRequest

public javax.servlet.http.HttpServletRequest getRequest()

getResponse

public javax.servlet.http.HttpServletResponse getResponse()

getOutputStream

public java.io.OutputStream getOutputStream()
                                     throws java.io.IOException

Throws:

java.io.IOException

getURL

public java.lang.String getURL()

getOriginalURL

public java.lang.String getOriginalURL()

getDataset

public java.lang.String getDataset()

getServer

public java.lang.String getServer()

getServletContext

public javax.servlet.ServletContext getServletContext()

getControllerPath

public java.lang.String getControllerPath()

getURLPath

public java.lang.String getURLPath()

getMode

public dap4.dap4lib.RequestMode getMode()

getFormat

public dap4.core.util.ResponseFormat getFormat()

setResponseHeader

public void setResponseHeader(java.lang.String name,
                              java.lang.String value)

Set a request header

Parameters:

name - the header name

value - the header value

queryLookup

public java.lang.String queryLookup(java.lang.String name)

getQueries

public java.util.Map<java.lang.String,java.lang.String> getQueries()

getResourcePath

public java.lang.String getResourcePath(java.lang.String relpath)
                                 throws java.io.IOException

Throws:

java.io.IOException

getDatasetPath

public java.lang.String getDatasetPath()