com.bigdata.rdf.sail.webapp.client.AbstractConnectOptions Maven / Gradle / Ivy
/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2014. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.rdf.sail.webapp.client;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.message.BasicNameValuePair;
import org.openrdf.query.resultio.BooleanQueryResultFormat;
import org.openrdf.query.resultio.TupleQueryResultFormat;
import org.openrdf.rio.RDFFormat;
public class AbstractConnectOptions implements IMimeTypes {
/** The URL of the remote REST service. */
public final String serviceURL;
/** The HTTP method (GET, POST, etc). */
public String method = "POST";
/** The Request Header value */
public static final transient String ACCEPT_HEADER = "Accept";
/**
* When true, the request is a non-idempotent operation (an
* UPDATE request or some kind) and must be directed to the leader for HA.
* When false, the request is an idempotent operation and
* should be load balanced over the available service for HA. This option
* is ignored for non-HA requests.
*/
public boolean update;
/**
* Used for {@link RDFFormat} responses.
*/
public static final String DEFAULT_GRAPH_ACCEPT_HEADER;
/**
* Used for {@link TupleQueryResultFormat} responses.
*/
public static final String DEFAULT_SOLUTIONS_ACCEPT_HEADER;
/**
* Used for {@link BooleanQueryResultFormat} responses.
*/
public static final String DEFAULT_BOOLEAN_ACCEPT_HEADER;
// /**
// * Used for NSS mutation operation responses.
// */
// public static final String MIME_APPLICATION_XML = "application/xml";
// /**
// * Used to interchange {@link Properties} objects.
// */
// public static final String MIME_PROPERTIES_XML = "application/xml";
static {
/**
* Note: This has been commented out. If it is included, then a lot of
* the total code base gets dragged into the bigdata-client JAR. If this
* creates a problem for clients, then we will need to examine the
* bigdata RDF model and bigdata RDF parser packages carefully and
* relayer them in order to decouple them from the rest of the code
* base.
*
* @see
* Create a bigdata-client jar for the NSS REST API
*/
// ServiceProviderHook.forceLoad();
/*
* FIXME We really need to know whether we are talking to a triple or
* quads mode end point before we can set this to [true]. The preference
* winds up as BINARY, which happens to support context so we are not
* forcing bigdata (at least) into a choice that it can not make. We
* might run into problems with non-bigdata end points. If they support
* SPARQL Service Description, then we could figure out whether the end
* point is triples or quads and setup the Accept header appropriately.
* Otherwise we might have to raise this into the application (or the
* ServiceFactory).
*/
final boolean requireContext = false;
DEFAULT_GRAPH_ACCEPT_HEADER = AcceptHeaderFactory
.getDefaultGraphAcceptHeader(requireContext);
DEFAULT_SOLUTIONS_ACCEPT_HEADER = AcceptHeaderFactory
.getDefaultSolutionsAcceptHeader();
DEFAULT_BOOLEAN_ACCEPT_HEADER = AcceptHeaderFactory
.getDefaultBooleanAcceptHeader();
}
/**
* Request parameters to be formatted as URL query parameters.
*/
public Map requestParams;
/**
* Optional request headers.
*/
public Map requestHeaders;
@Override
public String toString() {
return getClass().getName()//
+ "{method=" + method//
+ ",serviceURL=" + serviceURL//
+ ",update=" + update//
+ ",requestParams=" + requestParams//
+ ",requestHeaders=" + requestHeaders//
+ ",requestHeaders=" + requestHeaders//
+ "}";//
}
public AbstractConnectOptions(final String serviceURL) {
if (serviceURL == null)
throw new IllegalArgumentException();
this.serviceURL = serviceURL;
}
public void addRequestParam(final String name, final String[] vals) {
if (requestParams == null) {
requestParams = new LinkedHashMap();
}
requestParams.put(name, vals);
}
public void addRequestParam(final String name, final String val) {
addRequestParam(name, new String[] { val });
}
public void addRequestParam(final String name) {
addRequestParam(name, (String[]) null);
}
public String getRequestParam(final String name) {
return (requestParams != null && requestParams.containsKey(name)) ? requestParams
.get(name)[0] : null;
}
public void setHeader(final String name, final String val) {
if (requestHeaders == null) {
requestHeaders = new LinkedHashMap();
}
requestHeaders.put(name, val);
}
public void setAcceptHeader(final String value) {
setHeader(ACCEPT_HEADER, value);
}
public String getAcceptHeader() {
return getHeader(ACCEPT_HEADER);
}
public String getHeader(final String name) {
if (requestHeaders == null)
return null;
return requestHeaders.get(name);
}
/**
* Add any URL query parameters (for a GET request).
*
* @see #1097 (Extension REST API does not support multiple context values)
*
* @see #getFormEntity(Map)
*/
static public void addQueryParams(final StringBuilder urlString,
final Map requestParams)
throws UnsupportedEncodingException {
if (requestParams == null)
return;
boolean first = true;
for (Map.Entry e : requestParams.entrySet()) {
final String name = e.getKey();
final String[] vals = e.getValue();
if (vals == null) {
urlString.append(first ? "?" : "&");
first = false;
urlString.append(URLEncoder.encode(name, RemoteRepository.UTF8));
} else {
for (String val : vals) {
urlString.append(first ? "?" : "&");
first = false;
urlString.append(URLEncoder.encode(name, RemoteRepository.UTF8));
urlString.append("=");
if(val!=null)
urlString.append(URLEncoder.encode(val, RemoteRepository.UTF8));
}
}
} // next Map.Entry
}
/**
* Variant of {@link #addQueryParams(StringBuilder, Map)} that returns an
* entity for a POST request.
*
* Add query params to an {@link IMimeTypes#MIME_APPLICATION_URL_ENCODED}
* entity.
*
* @see #addQueryParams(StringBuilder, Map)
*
* TODO Rename either this or {@link #addQueryParams(StringBuilder, Map)}
* to align the method names since they serve the same purpose but for
* GET vs POST.
*/
public static HttpEntity getFormEntity(
final Map requestParams) throws Exception {
final List formparams = new ArrayList();
if (requestParams != null) {
for (Map.Entry e : requestParams.entrySet()) {
final String name = e.getKey();
final String[] vals = e.getValue();
if (vals == null) {
formparams.add(new BasicNameValuePair(name, null));
} else {
for (String val : vals) {
formparams.add(new BasicNameValuePair(name, val));
}
}
} // next Map.Entry
}
return new UrlEncodedFormEntity(formparams, RemoteRepository.UTF8);
}
/**
* Apply a UTF8 encoding to a component of a URL.
*
* @param in
* The text to be encoded.
*
* @return The UTF8 encoding of that text.
*
* @throws RuntimeException
* if the {@link RemoteRepository#UTF8} encoding is not
* available.
* @throws NullPointerException
* if the argument is null.
*/
public static String urlEncode(final String in) {
try {
final String out = URLEncoder.encode(in, RemoteRepository.UTF8);
return out;
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}