Module java.net.http

Package java.net.http

Interface HttpRequest.Builder

Enclosing class:

HttpRequest

public static interface HttpRequest.Builder

A builder of HTTP requests.

Instances of HttpRequest.Builder are created by calling HttpRequest.newBuilder(), HttpRequest.newBuilder(URI), or HttpRequest.newBuilder(HttpRequest, BiPredicate).

The builder can be used to configure per-request state, such as: the request URI, the request method (default is GET unless explicitly set), specific request headers, etc. Each of the setter methods modifies the state of the builder and returns the same instance. The methods are not synchronized and should not be called from multiple threads without external synchronization. The build method returns a new HttpRequest each time it is invoked. Once built an HttpRequest is immutable, and can be sent multiple times.

Note, that not all request headers may be set by user code. Some are restricted for security reasons and others such as the headers relating to authentication, redirection and cookie management may be managed by specific APIs rather than through directly user set headers.

Since:

11

Method Summary

Modifier and Type	Method	Description
HttpRequest	build()	Builds and returns an HttpRequest.
HttpRequest.Builder	copy()	Returns an exact duplicate copy of this Builder based on current state.
HttpRequest.Builder	DELETE()	Sets the request method of this builder to DELETE.
HttpRequest.Builder	expectContinue(boolean enable)	Requests the server to acknowledge the request before sending the body.
HttpRequest.Builder	GET()	Sets the request method of this builder to GET.
default HttpRequest.Builder	HEAD()	Sets the request method of this builder to HEAD.
HttpRequest.Builder	header(String name, String value)	Adds the given name value pair to the set of headers for this request.
HttpRequest.Builder	headers(String... headers)	Adds the given name value pairs to the set of headers for this request.
HttpRequest.Builder	method(String method, HttpRequest.BodyPublisher bodyPublisher)	Sets the request method and request body of this builder to the given values.
HttpRequest.Builder	POST(HttpRequest.BodyPublisher bodyPublisher)	Sets the request method of this builder to POST and sets its request body publisher to the given value.
HttpRequest.Builder	PUT(HttpRequest.BodyPublisher bodyPublisher)	Sets the request method of this builder to PUT and sets its request body publisher to the given value.
HttpRequest.Builder	setHeader(String name, String value)	Sets the given name value pair to the set of headers for this request.
HttpRequest.Builder	timeout(Duration duration)	Sets a timeout for this request.
HttpRequest.Builder	uri(URI uri)	Sets this HttpRequest's request URI.
HttpRequest.Builder	version(HttpClient.Version version)	Sets the preferred HttpClient.Version for this request.

Method Details

uri

HttpRequest.Builder uri(URI uri)

Sets this HttpRequest's request URI.

Parameters:

uri - the request URI

Returns:

this builder

Throws:

IllegalArgumentException - if the URI scheme is not supported

expectContinue

HttpRequest.Builder expectContinue(boolean enable)

Requests the server to acknowledge the request before sending the body. This is disabled by default. If enabled, the server is requested to send an error response or a 100 Continue response before the client sends the request body. This means the request publisher for the request will not be invoked until this interim response is received.

Parameters:

enable - true if Expect continue to be sent

Returns:

this builder

version

HttpRequest.Builder version(HttpClient.Version version)

Sets the preferred HttpClient.Version for this request.

The corresponding HttpResponse should be checked for the version that was actually used. If the version is not set in a request, then the version requested will be that of the sending HttpClient.

Parameters:

version - the HTTP protocol version requested

Returns:

this builder

header

HttpRequest.Builder header(String name,
 String value)

Adds the given name value pair to the set of headers for this request. The given value is added to the list of values for that name.

Implementation Note:

An implementation may choose to restrict some header names or values, as the HTTP Client may determine their value itself. For example, "Content-Length", which will be determined by the request Publisher. In such a case, an implementation of HttpRequest.Builder may choose to throw an IllegalArgumentException if such a header is passed to the builder.

Parameters:

name - the header name

value - the header value

Returns:

this builder

Throws:

IllegalArgumentException - if the header name or value is not valid, see RFC 7230 section-3.2, or the header name or value is restricted by the implementation.

headers

HttpRequest.Builder headers(String... headers)

Adds the given name value pairs to the set of headers for this request. The supplied String instances must alternate as header names and header values. To add several values to the same name then the same name must be supplied with each new value.

Parameters:

headers - the list of name value pairs

Returns:

this builder

Throws:

IllegalArgumentException - if there are an odd number of parameters, or if a header name or value is not valid, see RFC 7230 section-3.2, or a header name or value is restricted by the implementation.

timeout

HttpRequest.Builder timeout(Duration duration)

Sets a timeout for this request. If the response is not received within the specified timeout then an HttpTimeoutException is thrown from HttpClient::send or HttpClient::sendAsync completes exceptionally with an HttpTimeoutException. The effect of not setting a timeout is the same as setting an infinite Duration, i.e. block forever.

Parameters:

duration - the timeout duration

Returns:

this builder

Throws:

IllegalArgumentException - if the duration is non-positive

setHeader

HttpRequest.Builder setHeader(String name,
 String value)

Sets the given name value pair to the set of headers for this request. This overwrites any previously set values for name.

Parameters:

name - the header name

value - the header value

Returns:

this builder

Throws:

IllegalArgumentException - if the header name or value is not valid, see RFC 7230 section-3.2, or the header name or value is restricted by the implementation.

GET

HttpRequest.Builder GET()

Sets the request method of this builder to GET. This is the default.

Returns:

this builder

POST

HttpRequest.Builder POST(HttpRequest.BodyPublisher bodyPublisher)

Sets the request method of this builder to POST and sets its request body publisher to the given value.

Parameters:

bodyPublisher - the body publisher

Returns:

this builder

PUT

HttpRequest.Builder PUT(HttpRequest.BodyPublisher bodyPublisher)

Sets the request method of this builder to PUT and sets its request body publisher to the given value.

Parameters:

bodyPublisher - the body publisher

Returns:

this builder

DELETE

HttpRequest.Builder DELETE()

Sets the request method of this builder to DELETE.

Returns:

this builder

HEAD

default HttpRequest.Builder HEAD()

Sets the request method of this builder to HEAD.

Implementation Requirements:

The default implementation is expected to have the same behaviour as: return method("HEAD", BodyPublishers.noBody());

Returns:

this builder

Since:

18

method

HttpRequest.Builder method(String method,
 HttpRequest.BodyPublisher bodyPublisher)

Sets the request method and request body of this builder to the given values.

API Note:

The noBody request body publisher can be used where no request body is required or appropriate. Whether a method is restricted, or not, is implementation specific. For example, some implementations may choose to restrict the CONNECT method.

Parameters:

method - the method to use

bodyPublisher - the body publisher

Returns:

this builder

Throws:

IllegalArgumentException - if the method name is not valid, see RFC 7230 section-3.1.1, or the method is restricted by the implementation.

build

HttpRequest build()

Builds and returns an HttpRequest.

Implementation Requirements:

This method returns a new HttpRequest each time it is invoked. Once built, the HttpRequest is immutable and can be sent multiple times.

Returns:

a new HttpRequest

Throws:

IllegalStateException - if a URI has not been set

copy

HttpRequest.Builder copy()

Returns an exact duplicate copy of this Builder based on current state. The new builder can then be modified independently of this builder.

Returns:

an exact copy of this builder