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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 DefaultH2ResponseConverter INSTANCE = new DefaultH2ResponseConverter();
@Override
public HttpResponse convert(final List headers) throws HttpException {
String statusText = 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)");
}
if (name.equals(H2PseudoResponseHeaders.STATUS)) {
if (statusText != null) {
throw new ProtocolException("Multiple '%s' response headers are illegal", name);
}
statusText = value;
} else {
throw new ProtocolException("Unsupported response header '%s'", name);
}
} else {
if (name.equalsIgnoreCase(HttpHeaders.CONNECTION) || name.equalsIgnoreCase(HttpHeaders.KEEP_ALIVE)
|| name.equalsIgnoreCase(HttpHeaders.TRANSFER_ENCODING) || name.equalsIgnoreCase(HttpHeaders.UPGRADE)) {
throw new ProtocolException("Header '%s: %s' is illegal for HTTP/2 messages", header.getName(), header.getValue());
}
messageHeaders.add(header);
}
}
if (statusText == null) {
throw new ProtocolException("Mandatory response header '%s' not found", H2PseudoResponseHeaders.STATUS);
}
final int statusCode;
try {
statusCode = Integer.parseInt(statusText);
} catch (final NumberFormatException ex) {
throw new ProtocolException("Invalid response status: " + statusText);
}
final HttpResponse response = new BasicHttpResponse(statusCode, null);
response.setVersion(HttpVersion.HTTP_2);
for (int i = 0; i < messageHeaders.size(); i++) {
response.addHeader(messageHeaders.get(i));
}
return response;
}
@Override
public List convert(final HttpResponse message) throws HttpException {
final int code = message.getCode();
if (code < 100 || code >= 600) {
throw new ProtocolException("Response status %s is invalid", code);
}
final List headers = new ArrayList<>();
headers.add(new BasicHeader(H2PseudoResponseHeaders.STATUS, Integer.toString(code), 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.TRANSFER_ENCODING) || name.equalsIgnoreCase(HttpHeaders.UPGRADE)) {
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;
}
}