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Camunda 7 Keycloak Identity Provider Plugin including all transitive dependencies
/*
* ====================================================================
* 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
* {
public final static DefaultH2RequestConverter INSTANCE = new DefaultH2RequestConverter();
@Override
public HttpRequest convert(final List headers) throws HttpException {
String method = null;
String scheme = null;
String authority = null;
String path = null;
final List messageHeaders = new ArrayList<>();
for (int i = 0; i < headers.size(); i++) {
final Header header = headers.get(i);
final String name = header.getName();
final String value = header.getValue();
for (int n = 0; n < name.length(); n++) {
final char ch = name.charAt(n);
if (Character.isAlphabetic(ch) && !Character.isLowerCase(ch)) {
throw new ProtocolException("Header name '%s' is invalid (header name contains uppercase characters)", name);
}
}
if (name.startsWith(":")) {
if (!messageHeaders.isEmpty()) {
throw new ProtocolException("Invalid sequence of headers (pseudo-headers must precede message headers)");
}
switch (name) {
case H2PseudoRequestHeaders.METHOD:
if (method != null) {
throw new ProtocolException("Multiple '%s' request headers are illegal", name);
}
method = value;
break;
case H2PseudoRequestHeaders.SCHEME:
if (scheme != null) {
throw new ProtocolException("Multiple '%s' request headers are illegal", name);
}
scheme = value;
break;
case H2PseudoRequestHeaders.PATH:
if (path != null) {
throw new ProtocolException("Multiple '%s' request headers are illegal", name);
}
path = value;
break;
case H2PseudoRequestHeaders.AUTHORITY:
authority = value;
break;
default:
throw new ProtocolException("Unsupported request header '%s'", name);
}
} else {
if (name.equalsIgnoreCase(HttpHeaders.CONNECTION) || name.equalsIgnoreCase(HttpHeaders.KEEP_ALIVE)
|| name.equalsIgnoreCase(HttpHeaders.PROXY_CONNECTION) || name.equalsIgnoreCase(HttpHeaders.TRANSFER_ENCODING)
|| name.equalsIgnoreCase(HttpHeaders.HOST) || name.equalsIgnoreCase(HttpHeaders.UPGRADE)) {
throw new ProtocolException("Header '%s: %s' is illegal for HTTP/2 messages", header.getName(), header.getValue());
}
if (name.equalsIgnoreCase(HttpHeaders.TE) && !value.equalsIgnoreCase("trailers")) {
throw new ProtocolException("Header '%s: %s' is illegal for HTTP/2 messages", header.getName(), header.getValue());
}
messageHeaders.add(header);
}
}
if (method == null) {
throw new ProtocolException("Mandatory request header '%s' not found", H2PseudoRequestHeaders.METHOD);
}
if (Method.CONNECT.isSame(method)) {
if (authority == null) {
throw new ProtocolException("Header '%s' is mandatory for CONNECT request", H2PseudoRequestHeaders.AUTHORITY);
}
if (scheme != null) {
throw new ProtocolException("Header '%s' must not be set for CONNECT request", H2PseudoRequestHeaders.SCHEME);
}
if (path != null) {
throw new ProtocolException("Header '%s' must not be set for CONNECT request", H2PseudoRequestHeaders.PATH);
}
} else {
if (scheme == null) {
throw new ProtocolException("Mandatory request header '%s' not found", H2PseudoRequestHeaders.SCHEME);
}
if (path == null) {
throw new ProtocolException("Mandatory request header '%s' not found", H2PseudoRequestHeaders.PATH);
}
}
final HttpRequest httpRequest = new BasicHttpRequest(method, path);
httpRequest.setVersion(HttpVersion.HTTP_2);
httpRequest.setScheme(scheme);
try {
httpRequest.setAuthority(URIAuthority.create(authority));
} catch (final URISyntaxException ex) {
throw new ProtocolException(ex.getMessage(), ex);
}
httpRequest.setPath(path);
for (int i = 0; i < messageHeaders.size(); i++) {
httpRequest.addHeader(messageHeaders.get(i));
}
return httpRequest;
}
@Override
public List convert(final HttpRequest message) throws HttpException {
if (TextUtils.isBlank(message.getMethod())) {
throw new ProtocolException("Request method is empty");
}
final boolean optionMethod = Method.CONNECT.name().equalsIgnoreCase(message.getMethod());
if (optionMethod) {
if (message.getAuthority() == null) {
throw new ProtocolException("CONNECT request authority is not set");
}
if (message.getPath() != null) {
throw new ProtocolException("CONNECT request path must be null");
}
} else {
if (TextUtils.isBlank(message.getScheme())) {
throw new ProtocolException("Request scheme is not set");
}
if (TextUtils.isBlank(message.getPath())) {
throw new ProtocolException("Request path is not set");
}
}
final List headers = new ArrayList<>();
headers.add(new BasicHeader(H2PseudoRequestHeaders.METHOD, message.getMethod(), false));
if (optionMethod) {
headers.add(new BasicHeader(H2PseudoRequestHeaders.AUTHORITY, message.getAuthority(), false));
} else {
headers.add(new BasicHeader(H2PseudoRequestHeaders.SCHEME, message.getScheme(), false));
if (message.getAuthority() != null) {
headers.add(new BasicHeader(H2PseudoRequestHeaders.AUTHORITY, message.getAuthority(), false));
}
headers.add(new BasicHeader(H2PseudoRequestHeaders.PATH, message.getPath(), false));
}
for (final Iterator it = message.headerIterator(); it.hasNext(); ) {
final Header header = it.next();
final String name = header.getName();
final String value = header.getValue();
if (name.startsWith(":")) {
throw new ProtocolException("Header name '%s' is invalid", name);
}
if (name.equalsIgnoreCase(HttpHeaders.CONNECTION) || name.equalsIgnoreCase(HttpHeaders.KEEP_ALIVE)
|| name.equalsIgnoreCase(HttpHeaders.PROXY_CONNECTION) || name.equalsIgnoreCase(HttpHeaders.TRANSFER_ENCODING)
|| name.equalsIgnoreCase(HttpHeaders.HOST) || name.equalsIgnoreCase(HttpHeaders.UPGRADE)) {
throw new ProtocolException("Header '%s: %s' is illegal for HTTP/2 messages", header.getName(), header.getValue());
}
if (name.equalsIgnoreCase(HttpHeaders.TE) && !value.equalsIgnoreCase("trailers")) {
throw new ProtocolException("Header '%s: %s' is illegal for HTTP/2 messages", header.getName(), header.getValue());
}
headers.add(new BasicHeader(TextUtils.toLowerCase(name), value));
}
return headers;
}
}