Package dap4.servlet

Class DapRequest

java.lang.Object

dap4.servlet.DapRequest

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

Constructor Summary

Constructors

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

Method Summary

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

See Also:

Constant Field Values

RESOURCEDIRNAME

public static final String RESOURCEDIRNAME

See Also:

Constant Field Values

CONSTRAINTTAG

public static final 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 String url

querystring

protected String querystring

server

protected String server

controllerpath

protected String controllerpath

datasetpath

protected String datasetpath

mode

protected dap4.dap4lib.RequestMode mode

format

protected dap4.core.util.ResponseFormat format

queries

protected Map<String,String> queries

controller

protected DapController controller

order

protected ByteOrder order

checksummode

protected dap4.core.data.ChecksumMode checksummode

resourceroot

protected 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 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:

IOException

getOrder

public ByteOrder getOrder()

getResourceRoot

public 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 OutputStream getOutputStream()
                             throws IOException

Throws:

IOException

getURL

public String getURL()

getOriginalURL

public String getOriginalURL()

getDataset

public String getDataset()

getServer

public String getServer()

getServletContext

public javax.servlet.ServletContext getServletContext()

getControllerPath

public String getControllerPath()

getURLPath

public String getURLPath()

getMode

public dap4.dap4lib.RequestMode getMode()

getFormat

public dap4.core.util.ResponseFormat getFormat()

setResponseHeader

public void setResponseHeader(String name,
                              String value)

Set a request header

Parameters:

name - the header name

value - the header value

queryLookup

public String queryLookup(String name)

getQueries

public Map<String,String> getQueries()

getResourcePath

public String getResourcePath(String relpath)
                       throws IOException

Throws:

IOException

getDatasetPath

public String getDatasetPath()