```
public interface RoutingContext
```
Represents the context for the handling of a request in Vert.x-Web.
A new instance is created for each HTTP request that is received in the Handler.handle(Object) of the router.
The same instance is passed to any matching request or failure handlers during the routing of the request or failure.
The context provides access to the HttpServerRequest and HttpServerResponse and allows you to maintain arbitrary data that lives for the lifetime of the context. Contexts are discarded once they have been routed to the handler for the request.
The context also provides access to the Session, cookies and body for the request, given the correct handlers in the application.
If you use the internal error handler

Author:

Tim Fox

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default List<LanguageHeader>`	`acceptableLanguages()`	Returns the languages for the current request.
`int`	`addBodyEndHandler(Handler<Void> handler)`	Provides a handler that will be called after the last part of the body is written to the wire.
`int`	`addEndHandler(Handler<AsyncResult<Void>> handler)`	Add an end handler for the request/response context.
`int`	`addHeadersEndHandler(Handler<Void> handler)`	Add a handler that will be called just before headers are written to the response.
`default RoutingContext`	`attachment(String filename)`	Set Content-Disposition get to "attachment" with optional `filename` mime type.
`RequestBody`	`body()`
`void`	`cancelAndCleanupFileUploads()`	Cancel all unfinished file upload in progress and delete all uploaded files.
`Route`	`currentRoute()`
`<T> Map<String,T>`	`data()`
`default Future<Void>`	`end()`	Shortcut to the response end.
`default Future<Void>`	`end(Buffer buffer)`	Shortcut to the response end.
`default Future<Void>`	`end(String chunk)`	Shortcut to the response end.
`default RoutingContext`	`etag(String etag)`	Set the ETag of a response.
`void`	`fail(int statusCode)`	Fail the context with the specified status code.
`void`	`fail(int statusCode, Throwable throwable)`	Fail the context with the specified throwable and the specified the status code.
`void`	`fail(Throwable throwable)`	Fail the context with the specified throwable and 500 status code.
`boolean`	`failed()`
`Throwable`	`failure()`	If the context is being routed to failure handlers after a failure has been triggered by calling `fail(Throwable)` then this will return that throwable.
`List<FileUpload>`	`fileUploads()`
`<T> T`	`get(String key)`	Get some data from the context.
`<T> T`	`get(String key, T defaultValue)`	Get some data from the context.
`String`	`getAcceptableContentType()`	If the route specifies produces matches, e.g.
`default boolean`	`is(String type)`	Check if the incoming request contains the "Content-Type" get field, and it contains the give mime `type`.
`default boolean`	`isFresh()`	Check if the request is fresh, aka Last-Modified and/or the ETag still match.
`boolean`	`isSessionAccessed()`	Whether the `session()` has been already called or not.
`default Future<Void>`	`json(Object json)`	Encode an Object to JSON and end the request.
`default RoutingContext`	`lastModified(String instant)`	Set the Last-Modified date using a String.
`default RoutingContext`	`lastModified(java.time.Instant instant)`	Set the Last-Modified date using a Instant.
`String`	`mountPoint()`
`void`	`next()`	Tell the router to route this context to the next matching route (if any).
`String`	`normalizedPath()`	Normalizes a path as per	`ParsedHeaderValues`	`parsedHeaders()`	The headers: Accept Accept-Charset Accept-Encoding Accept-Language Content-Type Parsed into `ParsedHeaderValue`
`String`	`pathParam(String name)`	Gets the value of a single path parameter
`Map<String,String>`	`pathParams()`	Returns a map of named parameters as defined in path declaration with their actual values
`default LanguageHeader`	`preferredLanguage()`	Helper to return the user preferred language.
`RoutingContext`	`put(String key, Object obj)`	Put some arbitrary data in the context.
`List<String>`	`queryParam(String name)`	Gets the value of a single query parameter.
`MultiMap`	`queryParams()`	Returns a map of all query parameters inside the query string The query parameters are lazily decoded: the decoding happens on the first time this method is called.
`MultiMap`	`queryParams(Charset encoding)`	Always decode the current query string with the given `encoding`.
`default Future<Void>`	`redirect(String url)`	Perform a 302 redirect to `url`.
`<T> T`	`remove(String key)`	Remove some data from the context.
`boolean`	`removeBodyEndHandler(int handlerID)`	Remove a body end handler
`boolean`	`removeEndHandler(int handlerID)`	Remove an end handler
`boolean`	`removeHeadersEndHandler(int handlerID)`	Remove a headers end handler
`HttpServerRequest`	`request()`
`void`	`reroute(HttpMethod method, String path)`	Restarts the current router with a new method and path.
`default void`	`reroute(String path)`	Restarts the current router with a new path and reusing the original method.
`HttpServerResponse`	`response()`
`Session`	`session()`	Get the session.
`void`	`setAcceptableContentType(String contentType)`	Set the acceptable content type.
`int`	`statusCode()`	If the context is being routed to failure handlers after a failure has been triggered by calling `fail(int)` then this will return that status code.
`UserContext`	`user()`	Control the user associated with this request.
`Vertx`	`vertx()`

- Method Detail
  - request
```
HttpServerRequest request()
```
    Returns:
    
    the HTTP request object
  - response
```
HttpServerResponse response()
```
    Returns:
    
    the HTTP response object
  - next
```
void next()
```
    Tell the router to route this context to the next matching route (if any). This method, if called, does not need to be called during the execution of the handler, it can be called some arbitrary time later, if required.
    If next is not called for a handler then the handler should make sure it ends the response or no response will be sent.
  - fail
```
void fail(int statusCode)
```
    Fail the context with the specified status code.
    This will cause the router to route the context to any matching failure handlers for the request. If no failure handlers match It will trigger the error handler matching the status code. You can define such error handler with Router.errorHandler(int, Handler). If no error handler is not defined, It will send a default failure response with provided status code.
    
    Parameters:
    
    statusCode - the HTTP status code
  - fail
```
void fail(Throwable throwable)
```
    Fail the context with the specified throwable and 500 status code.
    This will cause the router to route the context to any matching failure handlers for the request. If no failure handlers match It will trigger the error handler matching the status code. You can define such error handler with Router.errorHandler(int, Handler). If no error handler is not defined, It will send a default failure response with 500 status code.
    
    Parameters:
    
    throwable - a throwable representing the failure
  - fail
```
void fail(int statusCode,
          Throwable throwable)
```
    Fail the context with the specified throwable and the specified the status code.
    This will cause the router to route the context to any matching failure handlers for the request. If no failure handlers match It will trigger the error handler matching the status code. You can define such error handler with Router.errorHandler(int, Handler). If no error handler is not defined, It will send a default failure response with provided status code.
    
    Parameters:
    
    statusCode - the HTTP status code
    
    throwable - a throwable representing the failure
  - put
```
RoutingContext put(String key,
                   Object obj)
```
    Put some arbitrary data in the context. This will be available in any handlers that receive the context.
    
    Parameters:
    
    key - the key for the data
    
    obj - the data
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - get
```
<T> T get(String key)
```
    Get some data from the context. The data is available in any handlers that receive the context.
    
    Type Parameters:
    
    T - the type of the data
    
    Parameters:
    
    key - the key for the data
    
    Returns:
    
    the data
    
    Throws:
    
    ClassCastException - if the data is not of the expected type
  - get
```
<T> T get(String key,
          T defaultValue)
```
    Get some data from the context. The data is available in any handlers that receive the context.
    
    Type Parameters:
    
    T - the type of the data
    
    Parameters:
    
    key - the key for the data
    
    defaultValue - when the underlying data doesn't contain the key this will be the return value.
    
    Returns:
    
    the data
    
    Throws:
    
    ClassCastException - if the data is not of the expected type
  - remove
```
<T> T remove(String key)
```
    Remove some data from the context. The data is available in any handlers that receive the context.
    
    Type Parameters:
    
    T - the type of the data
    
    Parameters:
    
    key - the key for the data
    
    Returns:
    
    the previous data associated with the key
    
    Throws:
    
    ClassCastException - if the data is not of the expected type
  - data
```
<T> Map<String,T> data()
```
    Returns:
    
    all the context data as a map
  - vertx
```
Vertx vertx()
```
    Returns:
    
    the Vert.x instance associated to the initiating Router for this context
  - mountPoint
```
String mountPoint()
```
    Returns:
    
    the mount point for this router. It will be null for a top level router. For a sub-router it will be the path at which the subrouter was mounted.
  - currentRoute
```
Route currentRoute()
```
    Returns:
    
    the current route this context is being routed through.
  - normalizedPath
```
String normalizedPath()
```
    Normalizes a path as per Returns:
    normalized path
  - body
```
RequestBody body()
```
  - fileUploads
```
List<FileUpload> fileUploads()
```
    Returns:
    
    a list of FileUpload (if any) for the request. The context must have first been routed to a BodyHandler for this to work.
  - cancelAndCleanupFileUploads
```
void cancelAndCleanupFileUploads()
```
    Cancel all unfinished file upload in progress and delete all uploaded files.
  - session
```
Session session()
```
    Get the session. The context must have first been routed to a SessionHandler for this to be populated. Sessions live for a browser session, and are maintained by session cookies.
    
    Returns:
    
    the session.
  - isSessionAccessed
```
boolean isSessionAccessed()
```
    Whether the session() has been already called or not. This is usually used by the SessionHandler.
    
    Returns:
    
    true if the session has been accessed.
  - user
```
UserContext user()
```
    Control the user associated with this request. The user context allows accessing the security user object as well as perform authentication refreshes, logout and other operations.
    
    Returns:
    
    the user context
  - failure
```
Throwable failure()
```
    If the context is being routed to failure handlers after a failure has been triggered by calling fail(Throwable) then this will return that throwable. It can be used by failure handlers to render a response, e.g. create a failure response page.
    
    Returns:
    
    the throwable used when signalling failure
  - statusCode
```
int statusCode()
```
    If the context is being routed to failure handlers after a failure has been triggered by calling fail(int) then this will return that status code. It can be used by failure handlers to render a response, e.g. create a failure response page. When the status code has not been set yet (it is undefined) its value will be -1.
    
    Returns:
    
    the status code used when signalling failure
  - getAcceptableContentType
```
String getAcceptableContentType()
```
    If the route specifies produces matches, e.g. produces `text/html` and `text/plain`, and the `accept` header matches one or more of these then this returns the most acceptable match.
    
    Returns:
    
    the most acceptable content type.
  - parsedHeaders
```
ParsedHeaderValues parsedHeaders()
```
    The headers:
    
    Accept
    
    Accept-Charset
    
    Accept-Encoding
    
    Accept-Language
    
    Content-Type
    
    Parsed into ParsedHeaderValue
    Returns:
    
    A container with the parsed headers.
  - addHeadersEndHandler
```
int addHeadersEndHandler(Handler<Void> handler)
```
    Add a handler that will be called just before headers are written to the response. This gives you a hook where you can write any extra headers before the response has been written when it will be too late.
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    the id of the handler. This can be used if you later want to remove the handler.
  - removeHeadersEndHandler
```
boolean removeHeadersEndHandler(int handlerID)
```
    Remove a headers end handler
    
    Parameters:
    
    handlerID - the id as returned from addHeadersEndHandler(Handler).
    
    Returns:
    
    true if the handler existed and was removed, false otherwise
  - addBodyEndHandler
```
int addBodyEndHandler(Handler<Void> handler)
```
    Provides a handler that will be called after the last part of the body is written to the wire. The handler is called asynchronously of when the response has been received by the client. This provides a hook allowing you to do more operations once the request has been sent over the wire. Do not use this for resource cleanup as this handler might never get called (e.g. if the connection is reset).
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    the id of the handler. This can be used if you later want to remove the handler.
  - removeBodyEndHandler
```
boolean removeBodyEndHandler(int handlerID)
```
    Remove a body end handler
    
    Parameters:
    
    handlerID - the id as returned from addBodyEndHandler(Handler).
    
    Returns:
    
    true if the handler existed and was removed, false otherwise
  - addEndHandler
```
int addEndHandler(Handler<AsyncResult<Void>> handler)
```
    Add an end handler for the request/response context. This will be called when the response is disposed or an exception has been encountered to allow consistent cleanup. The handler is called asynchronously of when the response has been received by the client.
    
    Parameters:
    
    handler - the handler that will be called with either a success or failure result.
    
    Returns:
    
    the id of the handler. This can be used if you later want to remove the handler.
  - removeEndHandler
```
boolean removeEndHandler(int handlerID)
```
    Remove an end handler
    
    Parameters:
    
    handlerID - the id as returned from addEndHandler(Handler).
    
    Returns:
    
    true if the handler existed and was removed, false otherwise
  - failed
```
boolean failed()
```
    Returns:
    
    true if the context is being routed to failure handlers.
  - setAcceptableContentType
```
void setAcceptableContentType(String contentType)
```
    Set the acceptable content type. Used by
    
    Parameters:
    
    contentType - the content type
  - reroute
```
default void reroute(String path)
```
    Restarts the current router with a new path and reusing the original method. All path parameters are then parsed and available on the params list. Query params will also be allowed and available.
    
    Parameters:
    
    path - the new http path.
  - reroute
```
void reroute(HttpMethod method,
             String path)
```
    Restarts the current router with a new method and path. All path parameters are then parsed and available on the params list. Query params will also be allowed and available.
    
    Parameters:
    
    method - the new http request
    
    path - the new http path.
  - acceptableLanguages
```
default List<LanguageHeader> acceptableLanguages()
```
    Returns the languages for the current request. The languages are determined from the Accept-Language header and sorted on quality. When 2 or more entries have the same quality then the order used to return the best match is based on the lowest index on the original list. For example if a user has en-US and en-GB with same quality and this order the best match will be en-US because it was declared as first entry by the client.
    
    Returns:
    
    The best matched language for the request
  - preferredLanguage
```
default LanguageHeader preferredLanguage()
```
    Helper to return the user preferred language. It is the same action as returning the first element of the acceptable languages.
    
    Returns:
    
    the users preferred locale.
  - pathParams
```
Map<String,String> pathParams()
```
    Returns a map of named parameters as defined in path declaration with their actual values
    
    Returns:
    
    the map of named parameters
  - pathParam
```
String pathParam(String name)
```
    Gets the value of a single path parameter
    
    Parameters:
    
    name - the name of parameter as defined in path declaration
    
    Returns:
    
    the actual value of the parameter or null if it doesn't exist
  - queryParams
```
MultiMap queryParams()
```
    Returns a map of all query parameters inside the query string
    The query parameters are lazily decoded: the decoding happens on the first time this method is called. If the query string is invalid it fails the context
    
    Returns:
    
    the multimap of query parameters
  - queryParams
```
MultiMap queryParams(Charset encoding)
```
    Always decode the current query string with the given encoding. The decode result is never cached. Callers to this method are expected to cache the result if needed. Usually users should use queryParams(). This method is only useful when the requests without content type (GET requests as an example) expect that query params are in the ASCII format ISO-5559-1.
    
    Parameters:
    
    encoding - a non null character set.
    
    Returns:
    
    the multimap of query parameters
  - queryParam
```
List<String> queryParam(String name)
```
    Gets the value of a single query parameter. For more info queryParams()
    
    Parameters:
    
    name - The name of query parameter
    
    Returns:
    
    The list of all parameters matching the parameter name. It returns an empty list if no query parameter with name was found
  - attachment
```
default RoutingContext attachment(String filename)
```
    Set Content-Disposition get to "attachment" with optional filename mime type.
    
    Parameters:
    
    filename - the filename for the attachment
  - redirect
```
default Future<Void> redirect(String url)
```
    Perform a 302 redirect to url. If a custom 3xx code is already defined, then that one will be preferred.
    The string "back" is special-cased to provide Referrer support, when Referrer is not present "/" is used.
    Examples:
    redirect('back'); redirect('/login'); redirect('http://google.com');
    
    Parameters:
    
    url - the target url
  - json
```
default Future<Void> json(Object json)
```
    Encode an Object to JSON and end the request. When Content-Type is not set then correct Content-Type will be applied to the response
    
    Parameters:
    
    json - the json
    
    Returns:
    
    a future to handle the end of the request
  - is
```
default boolean is(String type)
```
    Check if the incoming request contains the "Content-Type" get field, and it contains the give mime `type`. If there is no request body, `false` is returned. If there is no content type, `false` is returned. Otherwise, it returns true if the `type` that matches.
    Examples:
    // With Content-Type: text/html; charset=utf-8 is("html"); // => true is("text/html"); // => true
    // When Content-Type is application/json is("application/json"); // => true is("html"); // => false
    
    Parameters:
    
    type - content type
    
    Returns:
    
    The most close value
  - isFresh
```
default boolean isFresh()
```
    Check if the request is fresh, aka Last-Modified and/or the ETag still match.
    
    Returns:
    
    true if content is fresh according to the cache.
  - etag
```
default RoutingContext etag(String etag)
```
    Set the ETag of a response. This will normalize the quotes if necessary.
    etag('md5hashsum'); etag('"md5hashsum"'); ('W/"123456789"');
    
    Parameters:
    
    etag - the etag value
  - lastModified
```
default RoutingContext lastModified(java.time.Instant instant)
```
    Set the Last-Modified date using a Instant.
    
    Parameters:
    
    instant - the last modified instant
  - lastModified
```
default RoutingContext lastModified(String instant)
```
    Set the Last-Modified date using a String.
    
    Parameters:
    
    instant - the last modified instant
  - end
```
default Future<Void> end(String chunk)
```
    Shortcut to the response end.
    
    Parameters:
    
    chunk - a chunk
    
    Returns:
    
    future
  - end
```
default Future<Void> end(Buffer buffer)
```
    Shortcut to the response end.
    
    Parameters:
    
    buffer - a chunk
    
    Returns:
    
    future
  - end
```
default Future<Void> end()
```
    Shortcut to the response end.
    
    Returns:
    
    future

Interface RoutingContext

Method Summary

Method Detail

request

response

next

fail

fail

fail

put

get

get

remove

data

vertx

mountPoint

currentRoute

normalizedPath

body

fileUploads

cancelAndCleanupFileUploads

session

isSessionAccessed

user

failure

statusCode

getAcceptableContentType

parsedHeaders

addHeadersEndHandler

removeHeadersEndHandler

addBodyEndHandler

removeBodyEndHandler

addEndHandler

removeEndHandler

failed

setAcceptableContentType

reroute

reroute

acceptableLanguages

preferredLanguage

pathParams

pathParam

queryParams

queryParams

queryParam

attachment

redirect

json

is

isFresh

etag

lastModified

lastModified

end

end

end