org.apache.hc.client5.http.utils.URIUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of httpclient5 Show documentation
Show all versions of httpclient5 Show documentation
Apache HttpComponents Client
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* originalPathSegments = uribuilder.getPathSegments();
final List pathSegments = new ArrayList<>(originalPathSegments);
for (final Iterator it = pathSegments.iterator(); it.hasNext(); ) {
final String pathSegment = it.next();
if (pathSegment.isEmpty() && it.hasNext()) {
it.remove();
}
}
if (pathSegments.size() != originalPathSegments.size()) {
uribuilder.setPathSegments(pathSegments);
}
if (pathSegments.isEmpty()) {
uribuilder.setPathSegments("");
}
return uribuilder.build();
}
/**
* A convenience method for
* {@link URIUtils#rewriteURI(URI, HttpHost, boolean)} that always keeps the
* fragment.
*/
public static URI rewriteURI(
final URI uri,
final HttpHost target) throws URISyntaxException {
return rewriteURI(uri, target, false);
}
/**
* A convenience method that creates a new {@link URI} whose scheme, host, port, path,
* query are taken from the existing URI, dropping any fragment or user-information.
* The path is set to "/" if not explicitly specified. The existing URI is returned
* unmodified if it has no fragment or user-information and has a path.
*
* @param uri
* original URI.
* @throws URISyntaxException
* If the resulting URI is invalid.
*/
public static URI rewriteURI(final URI uri) throws URISyntaxException {
Args.notNull(uri, "URI");
if (uri.isOpaque()) {
return uri;
}
final URIBuilder uribuilder = new URIBuilder(uri);
if (uribuilder.getUserInfo() != null) {
uribuilder.setUserInfo(null);
}
if (TextUtils.isEmpty(uribuilder.getPath())) {
uribuilder.setPath("/");
}
if (uribuilder.getHost() != null) {
uribuilder.setHost(uribuilder.getHost().toLowerCase(Locale.ROOT));
}
uribuilder.setFragment(null);
return uribuilder.build();
}
/**
* Resolves a URI reference against a base URI. Work-around for bug in
* java.net.URI (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4708535)
*
* @param baseURI the base URI
* @param reference the URI reference
* @return the resulting URI
*/
public static URI resolve(final URI baseURI, final String reference) {
return resolve(baseURI, URI.create(reference));
}
/**
* Resolves a URI reference against a base URI. Work-around for bugs in
* java.net.URI (e.g. http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4708535)
*
* @param baseURI the base URI
* @param reference the URI reference
* @return the resulting URI
*/
public static URI resolve(final URI baseURI, final URI reference) {
Args.notNull(baseURI, "Base URI");
Args.notNull(reference, "Reference URI");
final String s = reference.toASCIIString();
if (s.startsWith("?")) {
String baseUri = baseURI.toASCIIString();
final int i = baseUri.indexOf('?');
baseUri = i > -1 ? baseUri.substring(0, i) : baseUri;
return URI.create(baseUri + s);
}
final boolean emptyReference = s.isEmpty();
URI resolved;
if (emptyReference) {
resolved = baseURI.resolve(URI.create("#"));
final String resolvedString = resolved.toASCIIString();
resolved = URI.create(resolvedString.substring(0, resolvedString.indexOf('#')));
} else {
resolved = baseURI.resolve(reference);
}
try {
return normalizeSyntax(resolved);
} catch (final URISyntaxException ex) {
throw new IllegalArgumentException(ex);
}
}
/**
* Removes dot segments according to RFC 3986, section 5.2.4 and
* Syntax-Based Normalization according to RFC 3986, section 6.2.2.
*
* @param uri the original URI
* @return the URI without dot segments
*/
static URI normalizeSyntax(final URI uri) throws URISyntaxException {
if (uri.isOpaque() || uri.getAuthority() == null) {
// opaque and file: URIs
return uri;
}
Args.check(uri.isAbsolute(), "Base URI must be absolute");
final URIBuilder builder = new URIBuilder(uri);
final String path = builder.getPath();
if (path != null && !path.equals("/")) {
final String[] inputSegments = path.split("/");
final Stack outputSegments = new Stack<>();
for (final String inputSegment : inputSegments) {
if ((inputSegment.isEmpty()) || (".".equals(inputSegment))) {
// Do nothing
} else if ("..".equals(inputSegment)) {
if (!outputSegments.isEmpty()) {
outputSegments.pop();
}
} else {
outputSegments.push(inputSegment);
}
}
final StringBuilder outputBuffer = new StringBuilder();
for (final String outputSegment : outputSegments) {
outputBuffer.append('/').append(outputSegment);
}
if (path.lastIndexOf('/') == path.length() - 1) {
// path.endsWith("/") || path.equals("")
outputBuffer.append('/');
}
builder.setPath(outputBuffer.toString());
}
if (builder.getScheme() != null) {
builder.setScheme(builder.getScheme().toLowerCase(Locale.ROOT));
}
if (builder.getHost() != null) {
builder.setHost(builder.getHost().toLowerCase(Locale.ROOT));
}
return builder.build();
}
/**
* Extracts target host from the given {@link URI}.
*
* @param uri
* @return the target host if the URI is absolute or {@code null} if the URI is
* relative or does not contain a valid host name.
*
* @since 4.1
*/
public static HttpHost extractHost(final URI uri) {
if (uri == null) {
return null;
}
HttpHost target = null;
if (uri.isAbsolute()) {
int port = uri.getPort(); // may be overridden later
String host = uri.getHost();
if (host == null) { // normal parse failed; let's do it ourselves
// authority does not seem to care about the valid character-set for host names
host = uri.getAuthority();
if (host != null) {
// Strip off any leading user credentials
final int at = host.indexOf('@');
if (at >= 0) {
if (host.length() > at+1 ) {
host = host.substring(at+1);
} else {
host = null; // @ on its own
}
}
// Extract the port suffix, if present
if (host != null) {
final int colon = host.indexOf(':');
if (colon >= 0) {
final int pos = colon + 1;
int len = 0;
for (int i = pos; i < host.length(); i++) {
if (Character.isDigit(host.charAt(i))) {
len++;
} else {
break;
}
}
if (len > 0) {
try {
port = Integer.parseInt(host.substring(pos, pos + len));
} catch (final NumberFormatException ex) {
}
}
host = host.substring(0, colon);
}
}
}
}
final String scheme = uri.getScheme();
if (!TextUtils.isBlank(host)) {
try {
target = new HttpHost(scheme, host, port);
} catch (final IllegalArgumentException ignore) {
}
}
}
return target;
}
/**
* Derives the interpreted (absolute) URI that was used to generate the last
* request. This is done by extracting the request-uri and target origin for
* the last request and scanning all the redirect locations for the last
* fragment identifier, then combining the result into a {@link URI}.
*
* @param originalURI
* original request before any redirects
* @param target
* if the last URI is relative, it is resolved against this target,
* or {@code null} if not available.
* @param redirects
* collection of redirect locations since the original request
* or {@code null} if not available.
* @return interpreted (absolute) URI
*/
public static URI resolve(
final URI originalURI,
final HttpHost target,
final List redirects) throws URISyntaxException {
Args.notNull(originalURI, "Request URI");
final URIBuilder uribuilder;
if (redirects == null || redirects.isEmpty()) {
uribuilder = new URIBuilder(originalURI);
} else {
uribuilder = new URIBuilder(redirects.get(redirects.size() - 1));
String frag = uribuilder.getFragment();
// read interpreted fragment identifier from redirect locations
for (int i = redirects.size() - 1; frag == null && i >= 0; i--) {
frag = redirects.get(i).getFragment();
}
uribuilder.setFragment(frag);
}
// read interpreted fragment identifier from original request
if (uribuilder.getFragment() == null) {
uribuilder.setFragment(originalURI.getFragment());
}
// last target origin
if (target != null && !uribuilder.isAbsolute()) {
uribuilder.setScheme(target.getSchemeName());
uribuilder.setHost(target.getHostName());
uribuilder.setPort(target.getPort());
}
return uribuilder.build();
}
/**
* Convenience factory method for {@link URI} instances.
*
* @since 5.0
*/
public static URI create(final HttpHost host, final String path) throws URISyntaxException {
final URIBuilder builder = new URIBuilder(path);
if (host != null) {
builder.setHost(host.getHostName()).setPort(host.getPort()).setScheme(host.getSchemeName());
}
return builder.build();
}
/**
* Convenience factory method for {@link URI} instances.
*
* @since 5.0
*/
public static URI create(final String scheme, final URIAuthority host, final String path) throws URISyntaxException {
final URIBuilder builder = new URIBuilder(path);
if (scheme != null) {
builder.setScheme(scheme);
}
if (host != null) {
builder.setHost(host.getHostName()).setPort(host.getPort());
}
return builder.build();
}
/**
* This class should not be instantiated.
*/
private URIUtils() {
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy