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org.smallmind.web.jersey.proxy.JsonTarget Maven / Gradle / Ivy
/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* .
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.web.jersey.proxy;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import javax.ws.rs.WebApplicationException;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.smallmind.nutsnbolts.http.HttpMethod;
import org.smallmind.nutsnbolts.lang.UnknownSwitchCaseException;
import org.smallmind.nutsnbolts.util.Pair;
import org.smallmind.nutsnbolts.util.Tuple;
import org.smallmind.scribe.pen.Level;
import org.smallmind.scribe.pen.LoggerManager;
import org.smallmind.web.json.scaffold.util.JsonCodec;
public class JsonTarget {
private final CloseableHttpClient httpClient;
private final URI uri;
private Tuple headers;
private Tuple queryParameters;
private Level level = Level.OFF;
public JsonTarget (CloseableHttpClient httpClient, URI uri) {
this.httpClient = httpClient;
this.uri = uri;
}
public JsonTarget path (String path)
throws URISyntaxException {
URIBuilder uriBuilder = new URIBuilder().setScheme(uri.getScheme()).setUserInfo(uri.getUserInfo()).setHost(uri.getHost()).setPort(uri.getPort()).setPath(uri.getPath()).setCustomQuery(uri.getQuery()).setFragment(uri.getFragment());
URI pathURI = URI.create(path);
if (pathURI.getScheme() != null) {
uriBuilder.setScheme(pathURI.getScheme());
}
if (pathURI.getUserInfo() != null) {
uriBuilder.setUserInfo(pathURI.getUserInfo());
}
if (pathURI.getHost() != null) {
uriBuilder.setHost(pathURI.getHost());
}
if (pathURI.getPort() > 0) {
uriBuilder.setPort(pathURI.getPort());
}
if (pathURI.getPath() != null) {
uriBuilder.setPath((uri.getPath() == null) ? pathURI.getPath() : uri.getPath() + pathURI.getPath());
}
if (pathURI.getRawQuery() != null) {
uriBuilder.setCustomQuery((uri.getRawQuery() == null) ? pathURI.getQuery() : uri.getQuery() + "&" + pathURI.getQuery());
}
if (pathURI.getFragment() != null) {
uriBuilder.setFragment(pathURI.getFragment());
}
return new JsonTarget(httpClient, uriBuilder.build());
}
public JsonTarget header (String key, String value) {
if (headers == null) {
headers = new Tuple<>();
}
headers.addPair(key, value);
return this;
}
public JsonTarget query (String key, String value) {
if (queryParameters == null) {
queryParameters = new Tuple<>();
}
queryParameters.addPair(key, value);
return this;
}
public JsonTarget debug (Level level) {
this.level = level;
return this;
}
public T get (Class responseClass)
throws IOException, URISyntaxException {
HttpGet httpGet = ((HttpGet)createHttpRequest(HttpMethod.GET, null));
LoggerManager.getLogger(JsonTarget.class).log(level, new RequestDebugCollector(httpGet, null));
try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
return convertEntity(response, responseClass);
}
}
public T put (HttpEntity entity, Class responseClass)
throws IOException, URISyntaxException {
HttpPut httpPut = ((HttpPut)createHttpRequest(HttpMethod.PUT, entity));
httpPut.setEntity(entity);
LoggerManager.getLogger(JsonTarget.class).log(level, new RequestDebugCollector(httpPut, entity));
try (CloseableHttpResponse response = httpClient.execute(httpPut)) {
return convertEntity(response, responseClass);
}
}
public T post (HttpEntity entity, Class responseClass)
throws IOException, URISyntaxException {
HttpPost httpPost = ((HttpPost)createHttpRequest(HttpMethod.POST, entity));
httpPost.setEntity(entity);
LoggerManager.getLogger(JsonTarget.class).log(level, new RequestDebugCollector(httpPost, entity));
try (CloseableHttpResponse response = httpClient.execute(httpPost)) {
return convertEntity(response, responseClass);
}
}
public T patch (HttpEntity entity, Class responseClass)
throws IOException, URISyntaxException {
HttpPatch httpPatch = ((HttpPatch)createHttpRequest(HttpMethod.PATCH, entity));
httpPatch.setEntity(entity);
LoggerManager.getLogger(JsonTarget.class).log(level, new RequestDebugCollector(httpPatch, entity));
try (CloseableHttpResponse response = httpClient.execute(httpPatch)) {
return convertEntity(response, responseClass);
}
}
public T delete (Class responseClass)
throws IOException, URISyntaxException {
HttpDelete httpDelete = ((HttpDelete)createHttpRequest(HttpMethod.DELETE, null));
LoggerManager.getLogger(JsonTarget.class).log(level, new RequestDebugCollector(httpDelete, null));
try (CloseableHttpResponse response = httpClient.execute(httpDelete)) {
return convertEntity(response, responseClass);
}
}
private T convertEntity (HttpResponse response, Class responseClass)
throws IOException {
HttpEntity entity;
InputStreamHolder entityInputStreamHolder;
if (((entity = response.getEntity()) == null) || (entity.getContentLength() == 0) || (entityInputStreamHolder = new InputStreamHolder(entity.getContent())).isEmpty()) {
StatusLine statusLine;
if (((statusLine = response.getStatusLine()) == null) || ((statusLine.getStatusCode() >= 200) && statusLine.getStatusCode() < 300)) {
return null;
}
throw new WebApplicationException(statusLine.getReasonPhrase(), statusLine.getStatusCode());
}
LoggerManager.getLogger(JsonTarget.class).log(level, new ResponseDebugCollector(response, entityInputStreamHolder));
return JsonCodec.read(entityInputStreamHolder.getInputStream(), responseClass);
}
private HttpRequest createHttpRequest (HttpMethod httpMethod, HttpEntity entity)
throws URISyntaxException {
HttpRequest httpRequest;
if (queryParameters == null) {
switch (httpMethod) {
case GET:
httpRequest = new HttpGet(uri);
break;
case PUT:
httpRequest = new HttpPut(uri);
break;
case POST:
httpRequest = new HttpPost(uri);
break;
case PATCH:
httpRequest = new HttpPatch(uri);
break;
case DELETE:
httpRequest = new HttpDelete(uri);
break;
default:
throw new UnknownSwitchCaseException(httpMethod.name());
}
} else {
URIBuilder uriBuilder = new URIBuilder(uri);
for (Pair queryPair : queryParameters) {
uriBuilder.addParameter(queryPair.getFirst(), queryPair.getSecond());
}
switch (httpMethod) {
case GET:
httpRequest = new HttpGet(uriBuilder.build());
break;
case PUT:
httpRequest = new HttpPut(uriBuilder.build());
break;
case POST:
httpRequest = new HttpPost(uriBuilder.build());
break;
case PATCH:
httpRequest = new HttpPatch(uriBuilder.build());
break;
case DELETE:
httpRequest = new HttpDelete(uriBuilder.build());
break;
default:
throw new UnknownSwitchCaseException(httpMethod.name());
}
}
if (headers != null) {
for (Pair headerPair : headers) {
httpRequest.addHeader(headerPair.getFirst(), headerPair.getSecond());
}
}
if (entity != null) {
Header contentTypeHeader;
if ((contentTypeHeader = entity.getContentType()) != null) {
httpRequest.setHeader(contentTypeHeader.getName(), contentTypeHeader.getValue());
}
}
return httpRequest;
}
private class InputStreamHolder {
private InputStream inputStream;
private InputStreamHolder (InputStream inputStream) {
this.inputStream = inputStream;
}
private InputStream getInputStream () {
return inputStream;
}
private void setInputStream (InputStream inputStream) {
this.inputStream = inputStream;
}
public boolean isEmpty () {
return inputStream == null;
}
}
private class RequestDebugCollector {
private final HttpRequest httpRequest;
private final HttpEntity entity;
private RequestDebugCollector (HttpRequest httpRequest, HttpEntity entity) {
this.httpRequest = httpRequest;
this.entity = entity;
}
@Override
public String toString () {
StringBuilder debugBuilder = new StringBuilder();
debugBuilder.append("Sending client request\n");
debugBuilder.append("< ").append(httpRequest.getRequestLine()).append('\n');
for (Header header : httpRequest.getAllHeaders()) {
debugBuilder.append("< ").append(header.getName()).append(": ").append(header.getValue()).append('\n');
}
if (entity != null) {
try {
debugBuilder.append(EntityUtils.toString(entity)).append('\n');
} catch (IOException ioException) {
throw new RuntimeException(ioException);
}
}
return debugBuilder.toString();
}
}
private class ResponseDebugCollector {
private final HttpResponse response;
private final InputStreamHolder entityInputStreamHolder;
private ResponseDebugCollector (HttpResponse response, InputStreamHolder entityInputStreamHolder) {
this.response = response;
this.entityInputStreamHolder = entityInputStreamHolder;
}
@Override
public String toString () {
StringBuilder debugBuilder = new StringBuilder();
InputStream entityInputStream = entityInputStreamHolder.getInputStream();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
int singleByte;
debugBuilder.append("Receiving client response\n");
debugBuilder.append("< ").append(response.getStatusLine().getStatusCode()).append('\n');
for (Header header : response.getAllHeaders()) {
debugBuilder.append("< ").append(header.getName()).append(": ").append(header.getValue()).append('\n');
}
try {
while ((singleByte = entityInputStream.read()) >= 0) {
byteArrayOutputStream.write(singleByte);
}
byteArrayOutputStream.close();
} catch (IOException ioException) {
throw new RuntimeException(ioException);
}
entityInputStreamHolder.setInputStream(new ByteArrayInputStream(byteArrayOutputStream.toByteArray()));
debugBuilder.append(byteArrayOutputStream).append('\n');
return debugBuilder.toString();
}
}
}
