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* 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.
******************************************************************************/
package org.apache.olingo.odata2.core.batch;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import org.apache.olingo.odata2.api.client.batch.BatchChangeSet;
import org.apache.olingo.odata2.api.client.batch.BatchChangeSetPart;
import org.apache.olingo.odata2.api.client.batch.BatchPart;
import org.apache.olingo.odata2.api.client.batch.BatchQueryPart;
import org.apache.olingo.odata2.api.commons.HttpContentType;
import org.apache.olingo.odata2.api.commons.HttpHeaders;
public class BatchRequestWriter {
private static final String REG_EX_BOUNDARY =
"([a-zA-Z0-9_\\-\\.'\\+]{1,70})|\"([a-zA-Z0-9_\\-\\.'\\+\\s\\" +
"(\\),/:=\\?]{1,69}[a-zA-Z0-9_\\-\\.'\\+\\(\\),/:=\\?])\""; // See RFC 2046
private static final String COLON = ":";
private static final String SP = " ";
private static final String LF = "\r\n";
public static final String BOUNDARY_PREAMBLE = "changeset";
public static final String HTTP_1_1 = "HTTP/1.1";
private String batchBoundary;
private StringBuilder writer = new StringBuilder();
public InputStream writeBatchRequest(final List<BatchPart> batchParts, final String boundary) {
if (boundary.matches(REG_EX_BOUNDARY)) {
batchBoundary = boundary;
} else {
throw new IllegalArgumentException();
}
for (BatchPart batchPart : batchParts) {
writer.append("--").append(boundary).append(LF);
if (batchPart instanceof BatchChangeSet) {
appendChangeSet((BatchChangeSet) batchPart);
} else if (batchPart instanceof BatchQueryPart) {
BatchQueryPart request = (BatchQueryPart) batchPart;
appendRequestBodyPart(request.getMethod(), request.getUri(), null, request.getHeaders(),
request.getContentId());
}
}
writer.append(LF).append("--").append(boundary).append("--");
InputStream batchRequestBody;
batchRequestBody = new ByteArrayInputStream(BatchHelper.getBytes(writer.toString()));
return batchRequestBody;
}
private void appendChangeSet(final BatchChangeSet batchChangeSet) {
String boundary = BatchHelper.generateBoundary(BOUNDARY_PREAMBLE);
while (boundary.equals(batchBoundary) || !boundary.matches(REG_EX_BOUNDARY)) {
boundary = BatchHelper.generateBoundary(BOUNDARY_PREAMBLE);
}
writer.append(HttpHeaders.CONTENT_TYPE).append(COLON).append(SP).append(
HttpContentType.MULTIPART_MIXED + "; boundary=" + boundary).append(LF);
for (BatchChangeSetPart request : batchChangeSet.getChangeSetParts()) {
writer.append(LF).append("--").append(boundary).append(LF);
appendRequestBodyPart(request.getMethod(), request.getUri(), request.getBody(), request.getHeaders(), request
.getContentId());
}
writer.append(LF).append("--").append(boundary).append("--").append(LF);
}
private void appendRequestBodyPart(final String method, final String uri, final String body,
final Map<String, String> headers, final String contentId) {
boolean isContentLengthPresent = false;
writer.append(HttpHeaders.CONTENT_TYPE).append(COLON).append(SP).append(HttpContentType.APPLICATION_HTTP)
.append(LF);
writer.append(BatchHelper.HTTP_CONTENT_TRANSFER_ENCODING).append(COLON).append(SP)
.append(BatchHelper.BINARY_ENCODING).append(LF);
if (contentId != null) {
writer.append(BatchHelper.HTTP_CONTENT_ID).append(COLON).append(SP).append(contentId).append(LF);
}
String contentLength = getHeaderValue(headers, HttpHeaders.CONTENT_LENGTH);
if (contentLength != null && !contentLength.isEmpty()) {
isContentLengthPresent = true;
}
writer.append(LF);
writer.append(method).append(SP).append(uri).append(SP).append(HTTP_1_1);
writer.append(LF);
if (!isContentLengthPresent && body != null && !body.isEmpty()) {
writer.append(HttpHeaders.CONTENT_LENGTH).append(COLON).append(SP).append(BatchHelper.getBytes(body).length)
.append(LF);
}
appendHeader(headers);
if (body != null && !body.isEmpty()) {
writer.append(LF);
writer.append(body);
}
}
private void appendHeader(final Map<String, String> headers) {
for (Map.Entry<String, String> headerMap : headers.entrySet()) {
String name = headerMap.getKey();
writer.append(name).append(COLON).append(SP).append(headerMap.getValue()).append(LF);
}
}
private String getHeaderValue(final Map<String, String> headers, final String headerName) {
for (Map.Entry<String, String> header : headers.entrySet()) {
if (headerName.equalsIgnoreCase(header.getKey())) {
return header.getValue();
}
}
return null;
}
}