Package org.springframework.web.client

Interface RestClient.RequestHeadersSpec<S extends RestClient.RequestHeadersSpec<S>>

Type Parameters:
S - a self reference to the spec type
All Known Subinterfaces:
RestClient.RequestBodySpec, RestClient.RequestBodyUriSpec, RestClient.RequestHeadersUriSpec<S>
Enclosing interface:
RestClient
public static interface RestClient.RequestHeadersSpec<S extends RestClient.RequestHeadersSpec<S>>
Contract for specifying request headers leading up to the exchange.

  • Method Details

    • accept

      S accept(MediaType... acceptableMediaTypes)
      Set the list of acceptable media types, as specified by the Accept header.
      Parameters:
      acceptableMediaTypes - the acceptable media types
      Returns:
      this builder

    • acceptCharset

      S acceptCharset(Charset... acceptableCharsets)
      Set the list of acceptable charsets, as specified by the Accept-Charset header.
      Parameters:
      acceptableCharsets - the acceptable charsets
      Returns:
      this builder

    • cookie

      S cookie(String name, String value)
      Add a cookie with the given name and value.
      Parameters:
      name - the cookie name
      value - the cookie value
      Returns:
      this builder
      Since:
      6.2

    • cookies

      S cookies(Consumer<MultiValueMap<String,String>> cookiesConsumer)
      Provides access to every cookie declared so far with the possibility to add, replace, or remove values.
      Parameters:
      cookiesConsumer - the consumer to provide access to
      Returns:
      this builder
      Since:
      6.2

    • ifModifiedSince

      S ifModifiedSince(ZonedDateTime ifModifiedSince)
      Set the value of the If-Modified-Since header.
      Parameters:
      ifModifiedSince - the new value of the header
      Returns:
      this builder

    • ifNoneMatch

      S ifNoneMatch(String... ifNoneMatches)
      Set the values of the If-None-Match header.
      Parameters:
      ifNoneMatches - the new value of the header
      Returns:
      this builder

    • header

      S header(String headerName, String... headerValues)
      Add the given, single header value under the given name.
      Parameters:
      headerName - the header name
      headerValues - the header value(s)
      Returns:
      this builder

    • headers

      S headers(Consumer<HttpHeaders> headersConsumer)
      Provides access to every header declared so far with the possibility to add, replace, or remove values.
      Parameters:
      headersConsumer - the consumer to provide access to
      Returns:
      this builder

    • attribute

      S attribute(String name, Object value)
      Set the attribute with the given name to the given value.
      Parameters:
      name - the name of the attribute to add
      value - the value of the attribute to add
      Returns:
      this builder
      Since:
      6.2

    • attributes

      S attributes(Consumer<Map<String,Object>> attributesConsumer)
      Provides access to every attribute declared so far with the possibility to add, replace, or remove values.
      Parameters:
      attributesConsumer - the consumer to provide access to
      Returns:
      this builder
      Since:
      6.2

    • httpRequest

      S httpRequest(Consumer<ClientHttpRequest> requestConsumer)
      Callback for access to the ClientHttpRequest that in turn provides access to the native request of the underlying HTTP library.

      This could be useful for setting advanced, per-request options that are exposed by the underlying library.

      Parameters:
      requestConsumer - a consumer to access the ClientHttpRequest with
      Returns:
      this builder

    • retrieve

      @CheckReturnValue RestClient.ResponseSpec retrieve()
      Enter the retrieve workflow and use the returned RestClient.ResponseSpec to select from a number of built-in options to extract the response. For example: 
       ResponseEntity<Person> entity = client.get()
     .uri("/persons/1")
     .accept(MediaType.APPLICATION_JSON)
     .retrieve()
     .toEntity(Person.class);

      Or if interested only in the body: 

       Person person = client.get()
     .uri("/persons/1")
     .accept(MediaType.APPLICATION_JSON)
     .retrieve()
     .body(Person.class);
      Note that this method does not actually execute the request until you call one of the returned RestClient.ResponseSpec. Use the exchange(ExchangeFunction) variants if you need to separate request execution from response extraction.

      By default, 4xx response code result in a HttpClientErrorException and 5xx response codes in a HttpServerErrorException. To customize error handling, use onStatus handlers.

      Returns:
      ResponseSpec to specify how to decode the body

    • exchange

      @Nullable default <T> T exchange(RestClient.RequestHeadersSpec.ExchangeFunction<T> exchangeFunction)
      Exchange the ClientHttpResponse for a value of type T. This can be useful for advanced scenarios, for example to decode the response differently depending on the response status: 
       Person person = client.get()
     .uri("/people/1")
     .accept(MediaType.APPLICATION_JSON)
     .exchange((request, response) -> {
         if (response.getStatusCode().equals(HttpStatus.OK)) {
             return deserialize(response.getBody());
         }
         else {
             throw new BusinessException();
         }
     });

      Note: The response is closed after the exchange function has been invoked.

      Type Parameters:
      T - the type the response will be transformed to
      Parameters:
      exchangeFunction - the function to handle the response with
      Returns:
      the value returned from the exchange function, potentially null
      See Also:

    • exchangeForRequiredValue

      default <T> T exchangeForRequiredValue(RestClient.RequestHeadersSpec.RequiredValueExchangeFunction<T> exchangeFunction)
      Exchange the ClientHttpResponse for a value of type T. This can be useful for advanced scenarios, for example to decode the response differently depending on the response status: 
       Person person = client.get()
     .uri("/people/1")
     .accept(MediaType.APPLICATION_JSON)
     .exchange((request, response) -> {
         if (response.getStatusCode().equals(HttpStatus.OK)) {
             return deserialize(response.getBody());
         }
         else {
             throw new BusinessException();
         }
     });

      Note: The response is closed after the exchange function has been invoked.

      Type Parameters:
      T - the type the response will be transformed to
      Parameters:
      exchangeFunction - the function to handle the response with
      Returns:
      the value returned from the exchange function, never null
      Since:
      6.2.6

    • exchange

      @Nullable <T> T exchange(RestClient.RequestHeadersSpec.ExchangeFunction<T> exchangeFunction, boolean close)
      Exchange the ClientHttpResponse for a value of type T. This can be useful for advanced scenarios, for example to decode the response differently depending on the response status: 
       Person person = client.get()
     .uri("/people/1")
     .accept(MediaType.APPLICATION_JSON)
     .exchange((request, response) -> {
         if (response.getStatusCode().equals(HttpStatus.OK)) {
             return deserialize(response.getBody());
         }
         else {
             throw new BusinessException();
         }
     });

      Note: If close is true, then the response is closed after the exchange function has been invoked. When set to false, the caller is responsible for closing the response.

      Type Parameters:
      T - the type the response will be transformed to
      Parameters:
      exchangeFunction - the function to handle the response with
      close - true to close the response after exchangeFunction is invoked, false to keep it open
      Returns:
      the value returned from the exchange function, potentially null
      See Also:

    • exchangeForRequiredValue

      <T> T exchangeForRequiredValue(RestClient.RequestHeadersSpec.RequiredValueExchangeFunction<T> exchangeFunction, boolean close)
      Exchange the ClientHttpResponse for a value of type T. This can be useful for advanced scenarios, for example to decode the response differently depending on the response status: 
       Person person = client.get()
     .uri("/people/1")
     .accept(MediaType.APPLICATION_JSON)
     .exchange((request, response) -> {
         if (response.getStatusCode().equals(HttpStatus.OK)) {
             return deserialize(response.getBody());
         }
         else {
             throw new BusinessException();
         }
     });

      Note: If close is true, then the response is closed after the exchange function has been invoked. When set to false, the caller is responsible for closing the response.

      Type Parameters:
      T - the type the response will be transformed to
      Parameters:
      exchangeFunction - the function to handle the response with
      close - true to close the response after exchangeFunction is invoked, false to keep it open
      Returns:
      the value returned from the exchange function, never null
      Since:
      6.2.6