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/*******************************************************************************
* Copyright (c) 2012-2013 University of Stuttgart.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and the Apache License 2.0 which both accompany this distribution,
* and are available at http://www.eclipse.org/legal/epl-v10.html
* and http://www.apache.org/licenses/LICENSE-2.0
*******************************************************************************/
/*
* Modifications Copyright 2016-2017 ZTE Corporation.
*/
/**
* This class wraps HTTP-Method functionality and thereby abstracts from low
* level code to simplify the usage.
*/
package org.opentosca.bpel4restlight.rest;
import org.apache.commons.httpclient.HttpMethodBase;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.PutMethod;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpHeaders;
public class HighLevelRestApi {
protected static final Log log = LogFactory.getLog(HighLevelRestApi.class);
/**
* This method implements the HTTP Put Method
*
* @param uri
* Resource URI
* @param requestPayload
* Content which has to be put into the Resource
* @return ResponseCode of HTTP Interaction
*/
@SuppressWarnings("deprecation")
public static HttpResponseMessage Put(String uri, String requestPayload, String acceptHeaderValue, String contentTypeHeader) {
PutMethod method = new PutMethod(uri);
// requestPayload = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
// requestPayload;
HighLevelRestApi.setHeader(method, acceptHeaderValue, contentTypeHeader);
method.setRequestBody(requestPayload);
HttpResponseMessage responseMessage = LowLevelRestApi.executeHttpMethod(method);
// kill <?xml... in front of response
HighLevelRestApi.cleanResponseBody(responseMessage);
return responseMessage;
}
/**
* This method implements the HTTP Post Method
*
* @param uri
* Resource URI
* @param requestPayload
* Content which has to be posted into the Resource
* @return ResponseCode of HTTP Interaction
*/
@SuppressWarnings("deprecation")
public static HttpResponseMessage Post(String uri, String requestPayload, String acceptHeaderValue, String contentTypeHeader) {
PostMethod method = null;
if (uri.contains("?")) {
log.debug("Found query trying to split");
String[] split = uri.split("\\?");
log.debug("Raw URI part: " + split[0]);
log.debug("Raw Query part: " + split[1]);
method = new PostMethod(split[0]);
method.setQueryString(HighLevelRestApi.createNameValuePairArrayFromQuery(split[1]));
} else {
method = new PostMethod(uri);
;
}
method.setRequestBody(requestPayload);
HighLevelRestApi.setHeader(method, acceptHeaderValue, contentTypeHeader);
HttpResponseMessage responseMessage = LowLevelRestApi.executeHttpMethod(method);
HighLevelRestApi.cleanResponseBody(responseMessage);
return responseMessage;
}
/**
* This method implements the HTTP Get Method
*
* @param uri
* Resource URI
* @return Content represented by the Resource URI
*/
public static HttpResponseMessage Get(String uri, String acceptHeaderValue, String contentTypeHeader) {
log.debug("Setting URI to: \n");
log.debug(uri);
GetMethod method = null;
if (uri.contains("?")) {
log.debug("Found query trying to split");
String[] split = uri.split("\\?");
log.debug("Raw URI part: " + split[0]);
log.debug("Raw Query part: " + split[1]);
method = new GetMethod(split[0]);
method.setQueryString(HighLevelRestApi.createNameValuePairArrayFromQuery(split[1]));
} else {
method = new GetMethod(uri);
}
HighLevelRestApi.setHeader(method, acceptHeaderValue, contentTypeHeader);
HttpResponseMessage responseMessage = LowLevelRestApi.executeHttpMethod(method);
HighLevelRestApi.cleanResponseBody(responseMessage);
return responseMessage;
}
private static NameValuePair[] createNameValuePairArrayFromQuery(String query) {
// example:
// csarID=Moodle.csar&serviceTemplateID={http://www.example.com/tosca/ServiceTemplates/Moodle}Moodle&nodeTemplateID={http://www.example.com/tosca/ServiceTemplates/Moodle}VmApache
log.debug("Splitting query: " + query);
String[] pairs = query.trim().split("&");
NameValuePair[] nameValuePairArray = new NameValuePair[pairs.length];
int count = 0;
for (String pair : pairs) {
log.debug("Splitting query pair: " + pair);
String[] keyValue = pair.split("=");
NameValuePair nameValuePair = new NameValuePair();
log.debug("Key: " + keyValue[0] + " Value: " + keyValue[1]);
nameValuePair.setName(keyValue[0]);
nameValuePair.setValue(keyValue[1]);
nameValuePairArray[count] = nameValuePair;
count++;
}
return nameValuePairArray;
}
/**
* This method implements the HTTP Delete Method
*
* @param uri
* Resource URI
* @return ResponseCode of HTTP Interaction
*/
public static HttpResponseMessage Delete(String uri, String acceptHeaderValue, String contentTypeHeader) {
DeleteMethod method = new DeleteMethod(uri);
HighLevelRestApi.setHeader(method, acceptHeaderValue, contentTypeHeader);
HttpResponseMessage responseMessage = LowLevelRestApi.executeHttpMethod(method);
HighLevelRestApi.cleanResponseBody(responseMessage);
return responseMessage;
}
private static void setHeader(HttpMethodBase method, String accept, String contentType) {
if (!"".equals(accept)) {
method.setRequestHeader(HttpHeaders.ACCEPT, accept);
} else {
method.setRequestHeader(HttpHeaders.ACCEPT, "application/xml");
}
if (contentType != null && !"".equals(contentType)) {
method.setRequestHeader(HttpHeaders.CONTENT_TYPE, contentType);
} else {
// method.setRequestHeader("Accept", accept);
}
}
private static void cleanResponseBody(HttpResponseMessage responseMessage) {
log.debug("ResponseBody: \n");
if (responseMessage != null && responseMessage.getResponseBody() != null) {
log.debug(responseMessage.getResponseBody());
String temp = responseMessage.getResponseBody()
.replace("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>", "");
responseMessage.setResponseBody(temp);
}
}
}
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