/*
* Copyright 2002-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.servlet.function;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.nio.charset.Charset;
import java.security.Principal;
import java.time.Instant;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.OptionalLong;
import java.util.function.Consumer;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.Part;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpRange;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.PathContainer;
import org.springframework.http.server.RequestPath;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.MultiValueMap;
import org.springframework.web.util.ServletRequestPathUtils;
import org.springframework.web.util.UriBuilder;
Represents a server-side HTTP request, as handled by a HandlerFunction
. Access to headers and body is offered by Headers
and body(Class)
, respectively. Author: Arjen Poutsma Since: 5.2
/**
* Represents a server-side HTTP request, as handled by a {@code HandlerFunction}.
* Access to headers and body is offered by {@link Headers} and
* {@link #body(Class)}, respectively.
*
* @author Arjen Poutsma
* @since 5.2
*/
public interface ServerRequest {
Get the HTTP method.
Returns: the HTTP method as an HttpMethod enum value, or null
if not resolvable (e.g. in case of a non-standard HTTP method)
/**
* Get the HTTP method.
* @return the HTTP method as an HttpMethod enum value, or {@code null}
* if not resolvable (e.g. in case of a non-standard HTTP method)
*/
@Nullable
default HttpMethod method() {
return HttpMethod.resolve(methodName());
}
Get the name of the HTTP method.
Returns: the HTTP method as a String
/**
* Get the name of the HTTP method.
* @return the HTTP method as a String
*/
String methodName();
Get the request URI.
/**
* Get the request URI.
*/
URI uri();
Get a UriBuilderComponents
from the URI associated with this ServerRequest
. Returns: a URI builder
/**
* Get a {@code UriBuilderComponents} from the URI associated with this
* {@code ServerRequest}.
*
* @return a URI builder
*/
UriBuilder uriBuilder();
Get the request path.
/**
* Get the request path.
*/
default String path() {
return requestPath().pathWithinApplication().value();
}
Get the request path as a PathContainer
. Deprecated: as of 5.3, in favor on requestPath()
/**
* Get the request path as a {@code PathContainer}.
* @deprecated as of 5.3, in favor on {@link #requestPath()}
*/
@Deprecated
default PathContainer pathContainer() {
return requestPath();
}
Get the request path as a PathContainer
. Since: 5.3
/**
* Get the request path as a {@code PathContainer}.
* @since 5.3
*/
default RequestPath requestPath() {
return ServletRequestPathUtils.getParsedRequestPath(servletRequest());
}
Get the headers of this request.
/**
* Get the headers of this request.
*/
Headers headers();
Get the cookies of this request.
/**
* Get the cookies of this request.
*/
MultiValueMap<String, Cookie> cookies();
Get the remote address to which this request is connected, if available.
/**
* Get the remote address to which this request is connected, if available.
*/
Optional<InetSocketAddress> remoteAddress();
Get the readers used to convert the body of this request.
/**
* Get the readers used to convert the body of this request.
*/
List<HttpMessageConverter<?>> messageConverters();
Extract the body as an object of the given type.
Params: - bodyType – the type of return value
Type parameters: - <T> – the body type
Returns: the body
/**
* Extract the body as an object of the given type.
* @param bodyType the type of return value
* @param <T> the body type
* @return the body
*/
<T> T body(Class<T> bodyType) throws ServletException, IOException;
Extract the body as an object of the given type.
Params: - bodyType – the type of return value
Type parameters: - <T> – the body type
Returns: the body
/**
* Extract the body as an object of the given type.
* @param bodyType the type of return value
* @param <T> the body type
* @return the body
*/
<T> T body(ParameterizedTypeReference<T> bodyType) throws ServletException, IOException;
Get the request attribute value if present.
Params: - name – the attribute name
Returns: the attribute value
/**
* Get the request attribute value if present.
* @param name the attribute name
* @return the attribute value
*/
default Optional<Object> attribute(String name) {
Map<String, Object> attributes = attributes();
if (attributes.containsKey(name)) {
return Optional.of(attributes.get(name));
}
else {
return Optional.empty();
}
}
Get a mutable map of request attributes.
Returns: the request attributes
/**
* Get a mutable map of request attributes.
* @return the request attributes
*/
Map<String, Object> attributes();
Get the first parameter with the given name, if present. Servlet
parameters are contained in the query string or posted form data.
Params: - name – the parameter name
See Also: - getParameter.getParameter(String)
Returns: the parameter value
/**
* Get the first parameter with the given name, if present. Servlet
* parameters are contained in the query string or posted form data.
* @param name the parameter name
* @return the parameter value
* @see HttpServletRequest#getParameter(String)
*/
default Optional<String> param(String name) {
List<String> paramValues = params().get(name);
if (CollectionUtils.isEmpty(paramValues)) {
return Optional.empty();
}
else {
String value = paramValues.get(0);
if (value == null) {
value = "";
}
return Optional.of(value);
}
}
Get all parameters for this request. Servlet parameters are contained
in the query string or posted form data.
See Also: - getParameterMap.getParameterMap()
/**
* Get all parameters for this request. Servlet parameters are contained
* in the query string or posted form data.
* @see HttpServletRequest#getParameterMap()
*/
MultiValueMap<String, String> params();
Get the parts of a multipart request, provided the Content-Type is "multipart/form-data"
, or an exception otherwise. Throws: - IOException – if an I/O error occurred during the retrieval
- ServletException – if this request is not of type
"multipart/form-data"
See Also: - getParts.getParts()
Returns: the multipart data, mapping from name to part(s) Since: 5.3
/**
* Get the parts of a multipart request, provided the Content-Type is
* {@code "multipart/form-data"}, or an exception otherwise.
* @return the multipart data, mapping from name to part(s)
* @throws IOException if an I/O error occurred during the retrieval
* @throws ServletException if this request is not of type {@code "multipart/form-data"}
* @since 5.3
* @see HttpServletRequest#getParts()
*/
MultiValueMap<String, Part> multipartData() throws IOException, ServletException;
Get the path variable with the given name, if present.
Params: - name – the variable name
Throws: - IllegalArgumentException – if there is no path variable with the given name
Returns: the variable value
/**
* Get the path variable with the given name, if present.
* @param name the variable name
* @return the variable value
* @throws IllegalArgumentException if there is no path variable with the given name
*/
default String pathVariable(String name) {
Map<String, String> pathVariables = pathVariables();
if (pathVariables.containsKey(name)) {
return pathVariables().get(name);
}
else {
throw new IllegalArgumentException("No path variable with name \"" + name + "\" available");
}
}
Get all path variables for this request.
/**
* Get all path variables for this request.
*/
Map<String, String> pathVariables();
Get the web session for this request. Always guaranteed to
return an instance either matching to the session id requested by the
client, or with a new session id either because the client did not
specify one or because the underlying session had expired. Use of this
method does not automatically create a session.
/**
* Get the web session for this request. Always guaranteed to
* return an instance either matching to the session id requested by the
* client, or with a new session id either because the client did not
* specify one or because the underlying session had expired. Use of this
* method does not automatically create a session.
*/
HttpSession session();
Get the authenticated user for the request, if any.
/**
* Get the authenticated user for the request, if any.
*/
Optional<Principal> principal();
Get the servlet request that this request is based on.
/**
* Get the servlet request that this request is based on.
*/
HttpServletRequest servletRequest();
Check whether the requested resource has been modified given the
supplied last-modified timestamp (as determined by the application).
If not modified, this method returns a response with corresponding
status code and headers, otherwise an empty result.
Typical usage:
public ServerResponse myHandleMethod(ServerRequest request) {
Instant lastModified = // application-specific calculation
return request.checkNotModified(lastModified)
.orElseGet(() -> {
// further request processing, actually building content
return ServerResponse.ok().body(...);
});
}
This method works with conditional GET/HEAD requests, but
also with conditional POST/PUT/DELETE requests.
Note: you can use either this #checkNotModified(Instant)
method; or checkNotModified(String)
. If you want enforce both a strong entity tag and a Last-Modified value, as recommended by the HTTP specification, then you should use checkNotModified(Instant, String)
.
Params: - lastModified – the last-modified timestamp that the
application determined for the underlying resource
Returns: a corresponding response if the request qualifies as not
modified, or an empty result otherwise. Since: 5.2.5
/**
* Check whether the requested resource has been modified given the
* supplied last-modified timestamp (as determined by the application).
* If not modified, this method returns a response with corresponding
* status code and headers, otherwise an empty result.
* <p>Typical usage:
* <pre class="code">
* public ServerResponse myHandleMethod(ServerRequest request) {
* Instant lastModified = // application-specific calculation
* return request.checkNotModified(lastModified)
* .orElseGet(() -> {
* // further request processing, actually building content
* return ServerResponse.ok().body(...);
* });
* }</pre>
* <p>This method works with conditional GET/HEAD requests, but
* also with conditional POST/PUT/DELETE requests.
* <p><strong>Note:</strong> you can use either
* this {@code #checkNotModified(Instant)} method; or
* {@link #checkNotModified(String)}. If you want enforce both
* a strong entity tag and a Last-Modified value,
* as recommended by the HTTP specification,
* then you should use {@link #checkNotModified(Instant, String)}.
* @param lastModified the last-modified timestamp that the
* application determined for the underlying resource
* @return a corresponding response if the request qualifies as not
* modified, or an empty result otherwise.
* @since 5.2.5
*/
default Optional<ServerResponse> checkNotModified(Instant lastModified) {
Assert.notNull(lastModified, "LastModified must not be null");
return DefaultServerRequest.checkNotModified(servletRequest(), lastModified, null);
}
Check whether the requested resource has been modified given the supplied ETag
(entity tag), as determined by the application. If not modified, this method returns a response with corresponding status code and headers, otherwise an empty result. Typical usage:
public ServerResponse myHandleMethod(ServerRequest request) {
String eTag = // application-specific calculation
return request.checkNotModified(eTag)
.orElseGet(() -> {
// further request processing, actually building content
return ServerResponse.ok().body(...);
});
}
This method works with conditional GET/HEAD requests, but
also with conditional POST/PUT/DELETE requests.
Note: you can use either this checkNotModified(Instant)
method; or #checkNotModified(String)
. If you want enforce both a strong entity tag and a Last-Modified value, as recommended by the HTTP specification, then you should use checkNotModified(Instant, String)
.
Params: - etag – the entity tag that the application determined
for the underlying resource. This parameter will be padded
with quotes (") if necessary.
Returns: a corresponding response if the request qualifies as not
modified, or an empty result otherwise. Since: 5.2.5
/**
* Check whether the requested resource has been modified given the
* supplied {@code ETag} (entity tag), as determined by the application.
* If not modified, this method returns a response with corresponding
* status code and headers, otherwise an empty result.
* <p>Typical usage:
* <pre class="code">
* public ServerResponse myHandleMethod(ServerRequest request) {
* String eTag = // application-specific calculation
* return request.checkNotModified(eTag)
* .orElseGet(() -> {
* // further request processing, actually building content
* return ServerResponse.ok().body(...);
* });
* }</pre>
* <p>This method works with conditional GET/HEAD requests, but
* also with conditional POST/PUT/DELETE requests.
* <p><strong>Note:</strong> you can use either
* this {@link #checkNotModified(Instant)} method; or
* {@code #checkNotModified(String)}. If you want enforce both
* a strong entity tag and a Last-Modified value,
* as recommended by the HTTP specification,
* then you should use {@link #checkNotModified(Instant, String)}.
* @param etag the entity tag that the application determined
* for the underlying resource. This parameter will be padded
* with quotes (") if necessary.
* @return a corresponding response if the request qualifies as not
* modified, or an empty result otherwise.
* @since 5.2.5
*/
default Optional<ServerResponse> checkNotModified(String etag) {
Assert.notNull(etag, "Etag must not be null");
return DefaultServerRequest.checkNotModified(servletRequest(), null, etag);
}
Check whether the requested resource has been modified given the supplied ETag
(entity tag) and last-modified timestamp, as determined by the application. If not modified, this method returns a response with corresponding status code and headers, otherwise an empty result. Typical usage:
public ServerResponse myHandleMethod(ServerRequest request) {
Instant lastModified = // application-specific calculation
String eTag = // application-specific calculation
return request.checkNotModified(lastModified, eTag)
.orElseGet(() -> {
// further request processing, actually building content
return ServerResponse.ok().body(...);
});
}
This method works with conditional GET/HEAD requests, but
also with conditional POST/PUT/DELETE requests.
Params: - lastModified – the last-modified timestamp that the
application determined for the underlying resource
- etag – the entity tag that the application determined
for the underlying resource. This parameter will be padded
with quotes (") if necessary.
Returns: a corresponding response if the request qualifies as not
modified, or an empty result otherwise. Since: 5.2.5
/**
* Check whether the requested resource has been modified given the
* supplied {@code ETag} (entity tag) and last-modified timestamp,
* as determined by the application.
* If not modified, this method returns a response with corresponding
* status code and headers, otherwise an empty result.
* <p>Typical usage:
* <pre class="code">
* public ServerResponse myHandleMethod(ServerRequest request) {
* Instant lastModified = // application-specific calculation
* String eTag = // application-specific calculation
* return request.checkNotModified(lastModified, eTag)
* .orElseGet(() -> {
* // further request processing, actually building content
* return ServerResponse.ok().body(...);
* });
* }</pre>
* <p>This method works with conditional GET/HEAD requests, but
* also with conditional POST/PUT/DELETE requests.
* @param lastModified the last-modified timestamp that the
* application determined for the underlying resource
* @param etag the entity tag that the application determined
* for the underlying resource. This parameter will be padded
* with quotes (") if necessary.
* @return a corresponding response if the request qualifies as not
* modified, or an empty result otherwise.
* @since 5.2.5
*/
default Optional<ServerResponse> checkNotModified(Instant lastModified, String etag) {
Assert.notNull(lastModified, "LastModified must not be null");
Assert.notNull(etag, "Etag must not be null");
return DefaultServerRequest.checkNotModified(servletRequest(), lastModified, etag);
}
// Static methods
Create a new ServerRequest
based on the given HttpServletRequest
and message converters. Params: - servletRequest – the request
- messageReaders – the message readers
Returns: the created ServerRequest
/**
* Create a new {@code ServerRequest} based on the given {@code HttpServletRequest} and
* message converters.
* @param servletRequest the request
* @param messageReaders the message readers
* @return the created {@code ServerRequest}
*/
static ServerRequest create(HttpServletRequest servletRequest, List<HttpMessageConverter<?>> messageReaders) {
return new DefaultServerRequest(servletRequest, messageReaders);
}
Create a builder with the status, headers, and cookies of the given request.
Params: - other – the response to copy the status, headers, and cookies from
Returns: the created builder
/**
* Create a builder with the status, headers, and cookies of the given request.
* @param other the response to copy the status, headers, and cookies from
* @return the created builder
*/
static Builder from(ServerRequest other) {
return new DefaultServerRequestBuilder(other);
}
Represents the headers of the HTTP request.
See Also: - headers.headers()
/**
* Represents the headers of the HTTP request.
* @see ServerRequest#headers()
*/
interface Headers {
Get the list of acceptable media types, as specified by the Accept
header. Returns an empty list if the acceptable media types are unspecified.
/**
* Get the list of acceptable media types, as specified by the {@code Accept}
* header.
* <p>Returns an empty list if the acceptable media types are unspecified.
*/
List<MediaType> accept();
Get the list of acceptable charsets, as specified by the Accept-Charset
header. /**
* Get the list of acceptable charsets, as specified by the
* {@code Accept-Charset} header.
*/
List<Charset> acceptCharset();
Get the list of acceptable languages, as specified by the Accept-Language
header. /**
* Get the list of acceptable languages, as specified by the
* {@code Accept-Language} header.
*/
List<Locale.LanguageRange> acceptLanguage();
Get the length of the body in bytes, as specified by the Content-Length
header. /**
* Get the length of the body in bytes, as specified by the
* {@code Content-Length} header.
*/
OptionalLong contentLength();
Get the media type of the body, as specified by the Content-Type
header. /**
* Get the media type of the body, as specified by the
* {@code Content-Type} header.
*/
Optional<MediaType> contentType();
Get the value of the Host
header, if available. If the header value does not contain a port, the port in the returned address will be 0
.
/**
* Get the value of the {@code Host} header, if available.
* <p>If the header value does not contain a port, the
* {@linkplain InetSocketAddress#getPort() port} in the returned address will
* be {@code 0}.
*/
@Nullable
InetSocketAddress host();
Get the value of the Range
header. Returns an empty list when the range is unknown.
/**
* Get the value of the {@code Range} header.
* <p>Returns an empty list when the range is unknown.
*/
List<HttpRange> range();
Get the header value(s), if any, for the header of the given name.
Returns an empty list if no header values are found.
Params: - headerName – the header name
/**
* Get the header value(s), if any, for the header of the given name.
* <p>Returns an empty list if no header values are found.
* @param headerName the header name
*/
List<String> header(String headerName);
Get the first header value, if any, for the header for the given name.
Returns null
if no header values are found.
Params: - headerName – the header name
Since: 5.2.5
/**
* Get the first header value, if any, for the header for the given name.
* <p>Returns {@code null} if no header values are found.
* @param headerName the header name
* @since 5.2.5
*/
@Nullable
default String firstHeader(String headerName) {
List<String> list = header(headerName);
return list.isEmpty() ? null : list.get(0);
}
Get the headers as an instance of HttpHeaders
. /**
* Get the headers as an instance of {@link HttpHeaders}.
*/
HttpHeaders asHttpHeaders();
}
Defines a builder for a request.
/**
* Defines a builder for a request.
*/
interface Builder {
Set the method of the request.
Params: - method – the new method
Returns: this builder
/**
* Set the method of the request.
* @param method the new method
* @return this builder
*/
Builder method(HttpMethod method);
Set the URI of the request.
Params: - uri – the new URI
Returns: this builder
/**
* Set the URI of the request.
* @param uri the new URI
* @return this builder
*/
Builder uri(URI uri);
Add the given header value(s) under the given name.
Params: - headerName – the header name
- headerValues – the header value(s)
See Also: Returns: this builder
/**
* Add the given header value(s) under the given name.
* @param headerName the header name
* @param headerValues the header value(s)
* @return this builder
* @see HttpHeaders#add(String, String)
*/
Builder header(String headerName, String... headerValues);
Manipulate this request's headers with the given consumer.
The headers provided to the consumer are "live", so that the consumer can be used to overwrite existing header values, remove values, or use any of the other HttpHeaders
methods.
Params: - headersConsumer – a function that consumes the
HttpHeaders
Returns: this builder
/**
* Manipulate this request's headers with the given consumer.
* <p>The headers provided to the consumer are "live", so that the consumer can be used to
* {@linkplain HttpHeaders#set(String, String) overwrite} existing header values,
* {@linkplain HttpHeaders#remove(Object) remove} values, or use any of the other
* {@link HttpHeaders} methods.
* @param headersConsumer a function that consumes the {@code HttpHeaders}
* @return this builder
*/
Builder headers(Consumer<HttpHeaders> headersConsumer);
Add a cookie with the given name and value(s).
Params: - name – the cookie name
- values – the cookie value(s)
Returns: this builder
/**
* Add a cookie with the given name and value(s).
* @param name the cookie name
* @param values the cookie value(s)
* @return this builder
*/
Builder cookie(String name, String... values);
Manipulate this request's cookies with the given consumer.
The map provided to the consumer is "live", so that the consumer can be used to overwrite existing cookies, remove cookies, or use any of the other MultiValueMap
methods.
Params: - cookiesConsumer – a function that consumes the cookies map
Returns: this builder
/**
* Manipulate this request's cookies with the given consumer.
* <p>The map provided to the consumer is "live", so that the consumer can be used to
* {@linkplain MultiValueMap#set(Object, Object) overwrite} existing cookies,
* {@linkplain MultiValueMap#remove(Object) remove} cookies, or use any of the other
* {@link MultiValueMap} methods.
* @param cookiesConsumer a function that consumes the cookies map
* @return this builder
*/
Builder cookies(Consumer<MultiValueMap<String, Cookie>> cookiesConsumer);
Set the body of the request.
Calling this methods will release the existing body of the builder.
Params: - body – the new body
Returns: this builder
/**
* Set the body of the request.
* <p>Calling this methods will
* {@linkplain org.springframework.core.io.buffer.DataBufferUtils#release(DataBuffer) release}
* the existing body of the builder.
* @param body the new body
* @return this builder
*/
Builder body(byte[] body);
Set the body of the request to the UTF-8 encoded bytes of the given string.
Calling this methods will release the existing body of the builder.
Params: - body – the new body
Returns: this builder
/**
* Set the body of the request to the UTF-8 encoded bytes of the given string.
* <p>Calling this methods will
* {@linkplain org.springframework.core.io.buffer.DataBufferUtils#release(DataBuffer) release}
* the existing body of the builder.
* @param body the new body
* @return this builder
*/
Builder body(String body);
Add an attribute with the given name and value.
Params: - name – the attribute name
- value – the attribute value
Returns: this builder
/**
* Add an attribute with the given name and value.
* @param name the attribute name
* @param value the attribute value
* @return this builder
*/
Builder attribute(String name, Object value);
Manipulate this request's attributes with the given consumer.
The map provided to the consumer is "live", so that the consumer can be used to overwrite existing attributes, remove attributes, or use any of the other Map
methods.
Params: - attributesConsumer – a function that consumes the attributes map
Returns: this builder
/**
* Manipulate this request's attributes with the given consumer.
* <p>The map provided to the consumer is "live", so that the consumer can be used
* to {@linkplain Map#put(Object, Object) overwrite} existing attributes,
* {@linkplain Map#remove(Object) remove} attributes, or use any of the other
* {@link Map} methods.
* @param attributesConsumer a function that consumes the attributes map
* @return this builder
*/
Builder attributes(Consumer<Map<String, Object>> attributesConsumer);
Add a parameter with the given name and value.
Params: - name – the parameter name
- values – the parameter value(s)
Returns: this builder
/**
* Add a parameter with the given name and value.
* @param name the parameter name
* @param values the parameter value(s)
* @return this builder
*/
Builder param(String name, String... values);
Manipulate this request's parameters with the given consumer.
The map provided to the consumer is "live", so that the consumer can be used to overwrite existing cookies, remove cookies, or use any of the other MultiValueMap
methods.
Params: - paramsConsumer – a function that consumes the parameters map
Returns: this builder
/**
* Manipulate this request's parameters with the given consumer.
* <p>The map provided to the consumer is "live", so that the consumer can be used to
* {@linkplain MultiValueMap#set(Object, Object) overwrite} existing cookies,
* {@linkplain MultiValueMap#remove(Object) remove} cookies, or use any of the other
* {@link MultiValueMap} methods.
* @param paramsConsumer a function that consumes the parameters map
* @return this builder
*/
Builder params(Consumer<MultiValueMap<String, String>> paramsConsumer);
Set the remote address of the request.
Params: - remoteAddress – the remote address
Returns: this builder
/**
* Set the remote address of the request.
* @param remoteAddress the remote address
* @return this builder
*/
Builder remoteAddress(InetSocketAddress remoteAddress);
Build the request.
Returns: the built request
/**
* Build the request.
* @return the built request
*/
ServerRequest build();
}
}