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/*
* Copyright 2014 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
*
* http://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 ratpack.http;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Multimap;
import ratpack.func.Action;
import ratpack.http.internal.DefaultHttpUrlBuilder;
import ratpack.util.MultiValueMap;
import java.net.URI;
import java.util.Map;
/**
* Builds a HTTP URL, safely.
*
* This builder applies appropriate escaping of values to produce valid HTTP URLs.
* Typically used to build URLs for use with the {@link ratpack.http.client.HttpClient}.
*
{@code
* import ratpack.http.HttpUrlBuilder;
*
* import static org.junit.Assert.assertEquals;
*
* public class Example {
*
* public static void main(String... args) {
* String url = HttpUrlBuilder.http()
* .host("foo.com")
* .path("a/b")
* .segment("c/%s", "d")
* .params("k1", "v1", "k2", "v2")
* .build()
* .toString();
*
* assertEquals("http://foo.com/a/b/c%2Fd?k1=v1&k2=v2", url);
* }
* }
* }
*/
public interface HttpUrlBuilder {
/**
* Create a new builder, with the initial state of the given URI.
*
* The URI must be of the {@code http} or {@code https} protocol.
* If it is of any other, an {@link IllegalArgumentException} will be thrown.
*
* @param uri the uri to base the builder's state from
* @return a new url builder
*/
static HttpUrlBuilder base(URI uri) {
return new DefaultHttpUrlBuilder(uri);
}
/**
* Create a new HTTP URL builder.
*
* The protocol is set to HTTP, host to {@code localhost} and port to the default for the protocol.
*
* @return a new url builder
*/
static HttpUrlBuilder http() {
return new DefaultHttpUrlBuilder();
}
/**
* Create a new HTTPS URL builder.
*
* The protocol is set to HTTPS, host to {@code localhost} and port to the default for the protocol.
*
* @return a new url builder
*/
static HttpUrlBuilder https() {
return http().secure();
}
/**
* Sets the protocol to be HTTPS.
*
* If the port has not been explicitly set, it will be changed to match the default for HTTPS.
*
* @return {@code this}
*/
HttpUrlBuilder secure();
/**
* Sets the host to the given value.
*
* @param host The host.
* @return {@code this}
*/
HttpUrlBuilder host(String host);
/**
* Sets the port to the given value.
*
* Any value less than 1 will throw an {@link IllegalAccessException}.
*
* @param port The port number.
* @return {@code this}
*/
HttpUrlBuilder port(int port);
/**
* Appends the path to the URL.
*
* The given value will may be a string such as {@code "foo"} or {@code "foo/bar"}.
* In the case of the latter, the {@code "/"} character will not be URL escaped.
* All other meta characters that apply to the path component of a HTTP URL will be percent encoded.
*
* If the value to append should be exactly one path segment (i.e. {@code "/"} should be encoded), use {@link #segment(String, Object...)}.
*
* @param path the path to append
* @return {@code this}
*/
HttpUrlBuilder path(String path);
/**
* Appends the path to the URL, unless it is empty or {@code null}.
*
* Has the same result as {@link #path(String)}, except that empty or {@code null} values are ignored.
*
* @param path the path to append
* @return {@code this}
* @since 1.2
*/
default HttpUrlBuilder maybePath(String path) {
if (path != null && !path.isEmpty()) {
path(path);
}
return this;
}
/**
* Appends the path to the URL, without escaping any meta characters.
*
* This can be used when it is guaranteed that the value has already been suitably encoded.
*
* If the value has not already been encoded, use {@link #path(String)}
*
* @param path the path to append
* @return {@code this}
* @since 1.2
*/
HttpUrlBuilder encodedPath(String path);
/**
* Appends the path to the URL, without escaping any meta characters, unless it is empty or {@code null}.
*
* Has the same result as {@link #encodedPath(String)}, except that empty or {@code null} values are ignored.
*
* @param path the path to append
* @return {@code this}
* @since 1.2
*/
default HttpUrlBuilder maybeEncodedPath(String path) {
if (path != null && !path.isEmpty()) {
encodedPath(path);
}
return this;
}
/**
* Appends one path segment to the URL.
*
* This method first builds a string using {@link String#format(String, Object...)}.
* The resultant string is percent encoded as is applicable for the path component of a HTTP URL.
*
* This method should generally be preferred over {@link #path(String)} when incrementally building dynamic URLs, where values may container the HTTP URL path delimiter (i.e. {@code "/"}).
*
* @param pathSegment the path segment format string
* @param args token arguments
* @return {@code this}
*/
HttpUrlBuilder segment(String pathSegment, Object... args);
/**
* Add some query params to the URL.
*
* Counting from zero, even numbered items are considered keys and odd numbered items are considered values.
* If param list ends in a key, a subsequent value of {@code ""} will be implied.
*
* @param params the param list
* @return {@code this}
*/
HttpUrlBuilder params(String... params);
/**
* Add some query params to the URL.
*
* The given action will be supplied with a multi map builder, to which it can contribute query params.
*
* This method is additive with regard to the query params of this builder.
*
* @param params an action that contributes query params
* @return {@code this}
* @throws Exception any thrown by {@code params}
*/
default HttpUrlBuilder params(Action> params) throws Exception {
return params(Action.with(ImmutableMultimap.builder(), params).build());
}
/**
* Add some query params to the URL.
*
* The entries of the given map are added as query params to the URL being built.
*
* This method is additive with regard to the query params of this builder.
*
* @param params a map of query params to add to the URL being built
* @return {@code this}
*/
HttpUrlBuilder params(Map params);
/**
* Add some query params to the URL.
*
* The entries of the given multi map are added as query params to the URL being built.
*
* This method is additive with regard to the query params of this builder.
*
* @param params a multi map of query params to add to the URL being built
* @return {@code this}
*/
HttpUrlBuilder params(Multimap params);
/**
* Add some query params to the URL.
*
* The entries of the given multi value map are added as query params to the URL being built.
*
* This method is additive with regard to the query params of this builder.
*
* @param params a multi value map of query params to add to the URL being built
* @return {@code this}
* @since 1.2
*/
HttpUrlBuilder params(MultiValueMap params);
/**
* Builds the URI based on this builder's current state.
*
* @return a new HTTP/HTTPS URI
*/
URI build();
}