Package org.simpleframework.http
Class RequestWrapper
java.lang.Object
org.simpleframework.http.RequestWrapper
- All Implemented Interfaces:
Request
,RequestHeader
,RequestLine
The
RequestWrapper
object is used so that the original
Request
object can be wrapped in a filtering proxy
object. This allows a Container
that interacts with
a modified request object. To add functionality to the request it
can be wrapped in a subclass of this and the overridden methods
can provide modified functionality to the standard request.- Author:
- Niall Gallagher
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
This is used to see if there is a HTTP message header with the given name in this container.This is used to acquire the address from the request line.getAttribute
(Object key) This is used as a shortcut for acquiring attributes for the response.This can be used to retrieve the response attributes.This is used to read the content body.This is used to acquire the remote client address.This is used to get the content body.int
This is a convenience method that can be used to determine the length of the message body.This is a convenience method that can be used to determine the content type of the message body.This is used to acquire a cookie usiing the name of that cookie.This is used to acquire all cookies that were sent in the header.long
This can be used to get the date of the first message header that has the specified name.getForm()
This is used to acquire all the form parameters from the HTTP request.This is used to read the content body.int
getInteger
(String name) This can be used to get the integer of the first message header that has the specified name.This is used to acquire the locales from the request header.int
getMajor()
This can be used to get the major number from a HTTP version.This can be used to get the HTTP method for this request.int
getMinor()
This can be used to get the major number from a HTTP version.getNames()
This method is used to get aList
of the names for the headers.getParameter
(String name) This is used to provide quick access to the parameters.This method is used to acquire aPart
from the form using a known name for the part.getPath()
This is used to acquire the path as extracted from the HTTP request URI.getQuery()
This method is used to acquire the query part from the HTTP request URI target.This method is used to acquire aSession
for the request.getSession
(boolean create) This method is used to acquire aSession
for the request.This can be used to get the URI specified for this HTTP request.This can be used to get the value of the first message header that has the specified name.This can be used to get the values of HTTP message headers that have the specified name.boolean
This is a convenience method that is used to determine whether or not this message has theConnection: close
header.boolean
isSecure()
This is used to determine if the request has been transferred over a secure connection.
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Field Details
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request
This is the request instance that is being wrapped.
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Constructor Details
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RequestWrapper
Constructor forRequestWrapper
object. This allows the originalRequest
object to be wrapped so that adjustments to the behavior of a request object handed to the container can be provided by a subclass implementation.- Parameters:
request
- the request object that is being wrapped
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Method Details
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getMajor
public int getMajor()This can be used to get the major number from a HTTP version. The major version corresponds to the major type that is the 1 of a HTTP/1.0 version string.- Specified by:
getMajor
in interfaceRequestLine
- Returns:
- the major version number for the request message
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getMinor
public int getMinor()This can be used to get the major number from a HTTP version. The major version corresponds to the major type that is the 0 of a HTTP/1.0 version string. This is used to determine if the request message has keep alive semantics.- Specified by:
getMinor
in interfaceRequestLine
- Returns:
- the major version number for the request message
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getMethod
This can be used to get the HTTP method for this request. The HTTP specification RFC 2616 specifies the HTTP request methods in section 9, Method Definitions. Typically this will be a GET, POST or a HEAD method, although any string is possible.- Specified by:
getMethod
in interfaceRequestLine
- Returns:
- the request method for this request message
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getTarget
This can be used to get the URI specified for this HTTP request. This corresponds to the either the full HTTP URI or the path part of the URI depending on how the client sends the request.- Specified by:
getTarget
in interfaceRequestLine
- Returns:
- the URI address that this HTTP request is targeting
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getAddress
This is used to acquire the address from the request line. An address is the full URI including the scheme, domain, port and the query parts. This allows various parameters to be acquired without having to parse the raw request target URI.- Specified by:
getAddress
in interfaceRequestLine
- Returns:
- this returns the address of the request line
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getPath
This is used to acquire the path as extracted from the HTTP request URI. ThePath
object that is provided by this method is immutable, it represents the normalized path only part from the request uniform resource identifier.- Specified by:
getPath
in interfaceRequestLine
- Returns:
- this returns the normalized path for the request
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getQuery
This method is used to acquire the query part from the HTTP request URI target. This will return only the values that have been extracted from the request URI target.- Specified by:
getQuery
in interfaceRequestLine
- Returns:
- the query associated with the HTTP target URI
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getNames
This method is used to get aList
of the names for the headers. This will provide the original names for the HTTP headers for the message. Modifications to the provided list will not affect the header, the list is a simple copy.- Specified by:
getNames
in interfaceRequestHeader
- Returns:
- this returns a list of the names within the header
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getInteger
This can be used to get the integer of the first message header that has the specified name. This is a convenience method that avoids having to deal with parsing the value of the requested HTTP message header. This returns -1 if theres no HTTP header value for the specified name.- Specified by:
getInteger
in interfaceRequestHeader
- Parameters:
name
- the HTTP message header to get the value from- Returns:
- this returns the date as a long from the header value
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getDate
This can be used to get the date of the first message header that has the specified name. This is a convenience method that avoids having to deal with parsing the value of the requested HTTP message header. This returns -1 if theres no HTTP header value for the specified name.- Specified by:
getDate
in interfaceRequestHeader
- Parameters:
name
- the HTTP message header to get the value from- Returns:
- this returns the date as a long from the header value
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getCookie
This is used to acquire a cookie usiing the name of that cookie. If the cookie exists within the HTTP header then it is returned as aCookie
object. Otherwise this method will return null. Each cookie object will contain the name, value and path of the cookie as well as the optional domain part.- Specified by:
getCookie
in interfaceRequestHeader
- Parameters:
name
- this is the name of the cookie object to acquire- Returns:
- this returns a cookie object from the header or null
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getCookies
This is used to acquire all cookies that were sent in the header. If any cookies exists within the HTTP header they are returned asCookie
objects. Otherwise this method will an empty list. Each cookie object will contain the name, value and path of the cookie as well as the optional domain part.- Specified by:
getCookies
in interfaceRequestHeader
- Returns:
- this returns all cookie objects from the HTTP header
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getValue
This can be used to get the value of the first message header that has the specified name. The value provided from this will be trimmed so there is no need to modify the value, also if the header name specified refers to a comma seperated list of values the value returned is the first value in that list. This returns null if theres no HTTP message header.- Specified by:
getValue
in interfaceRequestHeader
- Parameters:
name
- the HTTP message header to get the value from- Returns:
- this returns the value that the HTTP message header
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getValues
This can be used to get the values of HTTP message headers that have the specified name. This is a convenience method that will present that values as tokens extracted from the header. This has obvious performance benifits as it avoids having to deal withsubstring
andtrim
calls.The tokens returned by this method are ordered according to there HTTP quality values, or "q" values, see RFC 2616 section 3.9. This also strips out the quality parameter from tokens returned. So "image/html; q=0.9" results in "image/html". If there are no "q" values present then order is by appearence.
The result from this is either the trimmed header value, that is, the header value with no leading or trailing whitespace or an array of trimmed tokens ordered with the most preferred in the lower indexes, so index 0 is has higest preference.
- Specified by:
getValues
in interfaceRequestHeader
- Parameters:
name
- the name of the headers that are to be retrieved- Returns:
- ordered array of tokens extracted from the header(s)
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getLocales
This is used to acquire the locales from the request header. The locales are provided in theAccept-Language
header. This provides an indication as to the languages that the client accepts. It provides the locales in preference order.- Specified by:
getLocales
in interfaceRequestHeader
- Returns:
- this returns the locales preferred by the client
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contains
This is used to see if there is a HTTP message header with the given name in this container. If there is a HTTP message header with the specified name then this returns true otherwise false.- Specified by:
contains
in interfaceRequestHeader
- Parameters:
name
- the HTTP message header to get the value from- Returns:
- this returns true if the HTTP message header exists
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getContentType
This is a convenience method that can be used to determine the content type of the message body. This will determine whether there is aContent-Type
header, if there is then this will parse that header and represent it as a typed object which will expose the various parts of the HTTP header.- Specified by:
getContentType
in interfaceRequestHeader
- Returns:
- this returns the content type value if it exists
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getContentLength
public int getContentLength()This is a convenience method that can be used to determine the length of the message body. This will determine if there is aContent-Length
header, if it does then the length can be determined, if not then this returns -1.- Specified by:
getContentLength
in interfaceRequestHeader
- Returns:
- the content length, or -1 if it cannot be determined
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isSecure
public boolean isSecure()This is used to determine if the request has been transferred over a secure connection. If the protocol is HTTPS and the content is delivered over SSL then the request is considered to be secure. Also the associated response will be secure. -
isKeepAlive
public boolean isKeepAlive()This is a convenience method that is used to determine whether or not this message has theConnection: close
header. If the close token is present then this stream is not a keep-alive connection. If this has noConnection
header then the keep-alive status is determined by the HTTP version, that is, HTTP/1.1 is keep-alive by default, HTTP/1.0 is not keep-alive by default.- Specified by:
isKeepAlive
in interfaceRequest
- Returns:
- returns true if this has a keep-alive stream
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getAttributes
This can be used to retrieve the response attributes. These can be used to keep state with the response when it is passed to other systems for processing. Attributes act as a convenient model for storing objects associated with the response. This also inherits attributes associated with the client connection.- Specified by:
getAttributes
in interfaceRequest
- Returns:
- the attributes that have been set on this response
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getAttribute
This is used as a shortcut for acquiring attributes for the response. This avoids acquiring the attributeMap
in order to retrieve the attribute directly from that object. The attributes contain data specific to the response.- Specified by:
getAttribute
in interfaceRequest
- Parameters:
key
- this is the key of the attribute to acquire- Returns:
- this returns the attribute for the specified name
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getClientAddress
This is used to acquire the remote client address. This can be used to acquire both the port and the I.P address for the client. It allows the connected clients to be logged and if require it can be used to perform course grained security.- Specified by:
getClientAddress
in interfaceRequest
- Returns:
- this returns the client address for this request
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getContent
This is used to get the content body. This will essentially get the content from the body and present it as a single string. The encoding of the string is determined from the content type charset value. If the charset is not supported this will throw an exception. Typically only text values should be extracted using this method if there is a need to parse that content.- Specified by:
getContent
in interfaceRequest
- Returns:
- the body content as an encoded string value
- Throws:
IOException
- signifies that there is an I/O problem
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getInputStream
This is used to read the content body. The specifics of the data that is read from thisInputStream
can be determined by thegetContentLength
method. If the data sent by the client is chunked then it is decoded, see RFC 2616 section 3.6. Also multipart data is available asPart
objects however the raw content of the multipart body is still available.- Specified by:
getInputStream
in interfaceRequest
- Returns:
- returns the input stream containing the message body
- Throws:
Exception
- signifies that there is an I/O problemIOException
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getByteChannel
This is used to read the content body. The specifics of the data that is read from thisReadableByteChannel
can be determined by thegetContentLength
method. If the data sent by the client is chunked then it is decoded, see RFC 2616 section 3.6. This stream will never provide empty reads as the content is internally buffered, so this can do a full read.- Specified by:
getByteChannel
in interfaceRequest
- Returns:
- this returns the byte channel used to read the content
- Throws:
IOException
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getSession
This method is used to acquire aSession
for the request. The object retrieved provides a container for data associated to the connected client. This allows the request to perform more complex operations based on knowledge that is built up through a series of requests. The session is known to the system using aCookie
, which contains the session reference. This cookie value should not be modified as it used to reference the active session object.- Specified by:
getSession
in interfaceRequest
- Returns:
- returns an active session for the associated client
- Throws:
LeaseException
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getSession
This method is used to acquire aSession
for the request. The object retrieved provides a container for data associated to the connected client. This allows the request to perform more complex operations based on knowledge that is built up through a series of requests. The session is known to the system using aCookie
, which contains the session reference. This cookie value should not be modified as it used to reference the active session object.- Specified by:
getSession
in interfaceRequest
- Parameters:
create
- creates the session if it does not exist- Returns:
- returns an active session for the associated client
- Throws:
LeaseException
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getForm
This is used to acquire all the form parameters from the HTTP request. This includes the query and POST data values as well as the parts of a multipart request. The form is a convenience object enabling easy access to state.- Specified by:
getForm
in interfaceRequest
- Returns:
- this returns the form containing the state
- Throws:
IOException
- thrown if it could not be acquired
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getParameter
This is used to provide quick access to the parameters. This avoids having to acquire the requestForm
object. This basically acquires the parameters object and invokes thegetParameters
method with the given name.- Specified by:
getParameter
in interfaceRequest
- Parameters:
name
- this is the name of the parameter value- Throws:
IOException
- thrown if there is an I/O problem
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getPart
This method is used to acquire aPart
from the form using a known name for the part. This is typically used when there is a file upload with a multipart POST request. All parts that are not files are added to the query values as strings so that they can be used in a convenient way.- Specified by:
getPart
in interfaceRequest
- Parameters:
name
- this is the name of the part to acquire- Returns:
- the named part or null if the part does not exist
- Throws:
IOException
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