NSSMF Rest Utils

Adding utils to NSSMF Adapter

Change-Id: Id47d06844f3bf5f97c5f91c76f7e79ea7204a520
Issue-ID: SO-2544
Signed-off-by: jananib <janani.b@huawei.com>

3 files changed, 431 insertions, 0 deletions

diff --git a/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestResponse.java b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestResponse.java
new file mode 100644
index 0000000000..cc047e45c7
--- /dev/null
+++ b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestResponse.java
@@ -0,0 +1,92 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.nssmf.rest;
+
+import java.util.Map;
+
+public class RestResponse {
+
+    // the response content
+    private String responseContent;
+
+    // the response status
+    private int status;
+
+    // the response header
+    private Map<String, String> respHeaderMap;
+
+    public RestResponse() {
+        this.status = -1;
+
+        this.respHeaderMap = null;
+    }
+
+    public int getStatus() {
+        return this.status;
+    }
+
+    public void setStatus(int status) {
+        this.status = status;
+    }
+
+    public Map<String, String> getRespHeaderMap() {
+        return this.respHeaderMap;
+    }
+
+    public void setRespHeaderMap(Map<String, String> header) {
+        this.respHeaderMap = header;
+    }
+
+    public int getRespHeaderInt(String key) {
+        if (this.respHeaderMap != null) {
+            String result = this.respHeaderMap.get(key);
+            if (result != null) {
+                return Integer.parseInt(result);
+            }
+        }
+        return -1;
+    }
+
+    public long getRespHeaderLong(String key) {
+        if (this.respHeaderMap != null) {
+            String result = this.respHeaderMap.get(key);
+            if (result != null) {
+                return Long.parseLong(result);
+            }
+        }
+        return -1L;
+    }
+
+    public String getRespHeaderStr(String key) {
+        if (this.respHeaderMap != null) {
+            return this.respHeaderMap.get(key);
+        }
+        return null;
+    }
+
+    public String getResponseContent() {
+        return this.responseContent;
+    }
+
+    public void setResponseContent(String responseString) {
+        this.responseContent = responseString;
+    }
+}
diff --git a/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestUtil.java b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestUtil.java
new file mode 100644
index 0000000000..3592d4f6a3
--- /dev/null
+++ b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/RestUtil.java
@@ -0,0 +1,307 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.nssmf.rest;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+import javax.ws.rs.core.UriBuilder;
+import java.net.SocketTimeoutException;
+import java.net.URI;
+import org.apache.http.Header;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpPut;
+import org.apache.http.client.methods.HttpRequestBase;
+import org.apache.http.conn.ConnectTimeoutException;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.message.BasicHeader;
+import org.apache.http.util.EntityUtils;
+import org.onap.aai.domain.yang.EsrSystemInfo;
+import org.onap.aai.domain.yang.EsrSystemInfoList;
+import org.onap.aai.domain.yang.EsrThirdpartySdnc;
+import org.onap.aai.domain.yang.EsrThirdpartySdncList;
+import org.onap.so.adapters.nssmf.exceptions.ApplicationException;
+import org.onap.so.adapters.nssmf.extclients.aai.AaiServiceProvider;
+import org.onap.so.adapters.nssmf.model.TokenRequest;
+import org.onap.so.adapters.nssmf.model.TokenResponse;
+import org.onap.so.beans.nsmf.EsrInfo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import static org.apache.http.entity.ContentType.APPLICATION_JSON;
+import static org.onap.so.adapters.nssmf.rest.HttpMethod.POST;
+import static org.onap.so.adapters.nssmf.util.NssmfAdapterUtil.BAD_REQUEST;
+import static org.onap.so.adapters.nssmf.util.NssmfAdapterUtil.marshal;
+import static org.onap.so.adapters.nssmf.util.NssmfAdapterUtil.unMarshal;
+import static org.onap.so.logger.ErrorCode.AvailabilityError;
+import static org.onap.so.logger.LoggingAnchor.FOUR;
+import static org.onap.so.logger.MessageEnum.RA_NS_EXC;
+
+@Component
+public class RestUtil {
+
+    private static final Logger logger = LoggerFactory.getLogger(RestUtil.class);
+
+    private static final int DEFAULT_TIME_OUT = 60000;
+
+    private static final String NSSMI_ADAPTER = "NSSMI Adapter";
+
+    private static final String TOKEN_URL = "/api/rest/securityManagement/v1" + "/oauth/token";
+
+    @Autowired
+    private AaiServiceProvider aaiSvcProv;
+
+
+    public NssmfInfo getNssmfHost(EsrInfo esrInfo) throws ApplicationException {
+        EsrThirdpartySdncList sdncList = aaiSvcProv.invokeGetThirdPartySdncList();
+        if (sdncList != null && sdncList.getEsrThirdpartySdnc() != null) {
+            for (EsrThirdpartySdnc sdncEsr : sdncList.getEsrThirdpartySdnc()) {
+
+                EsrSystemInfoList sysInfoList =
+                        aaiSvcProv.invokeGetThirdPartySdncEsrSystemInfo(sdncEsr.getThirdpartySdncId());
+
+                if (sysInfoList != null && sysInfoList.getEsrSystemInfo() != null) {
+                    for (EsrSystemInfo esr : sysInfoList.getEsrSystemInfo()) {
+                        if (esr != null && esr.getType().equals(esrInfo.getNetworkType().getNetworkType())
+                                && esr.getVendor().equals(esrInfo.getVendor())) {
+                            logger.info("Found an entry with vendor name " + esrInfo.getVendor() + " and network type "
+                                    + esrInfo.getNetworkType() + " in ESR.");
+                            NssmfInfo nssmfInfo = new NssmfInfo();
+                            nssmfInfo.setIpAddress(esr.getIpAddress());
+                            nssmfInfo.setPort(esr.getPort());
+                            nssmfInfo.setCacert(esr.getSslCacert());
+                            nssmfInfo.setUserName(esr.getUserName());
+                            nssmfInfo.setPassword(esr.getPassword());
+                            String endPoint = UriBuilder.fromPath("").host(esr.getIpAddress())
+                                    .port(Integer.valueOf(esr.getPort())).scheme("https").build().toString();
+                            nssmfInfo.setUrl(endPoint);
+                            return nssmfInfo;
+                        }
+                    }
+                }
+
+            }
+        }
+
+        throw new ApplicationException(BAD_REQUEST, "ESR information is improper");
+    }
+
+    public RestResponse sendRequest(String url, HttpMethod methodType, String content, EsrInfo esrInfo)
+            throws ApplicationException {
+
+        NssmfInfo nssmfInfo = getNssmfHost(esrInfo);
+
+        TokenRequest req = new TokenRequest();
+        req.setGrantType("password");
+        req.setUserName(nssmfInfo.getUserName());
+        req.setValue(nssmfInfo.getPassword());
+
+        String tokenReq = marshal(req);
+
+        logger.info("Sending token request to NSSMF: " + tokenReq);
+        RestResponse tokenRes = send(nssmfInfo.getUrl() + TOKEN_URL, POST, tokenReq, null);
+
+        TokenResponse res = unMarshal(tokenRes.getResponseContent(), TokenResponse.class);
+        String token = res.getAccessToken();
+        Header header = new BasicHeader("X-Auth-Token", token);
+        String nssmfUrl = nssmfInfo.getUrl() + url;
+        return send(nssmfUrl, methodType, content, header);
+    }
+
+    private RestResponse send(String url, HttpMethod methodType, String content, Header header) {
+
+        HttpRequestBase req = null;
+        HttpResponse res = null;
+
+        logger.debug("Beginning to send message {}: {}", methodType, url);
+
+        try {
+            int timeout = DEFAULT_TIME_OUT;
+
+            RequestConfig config = RequestConfig.custom().setSocketTimeout(timeout).setConnectTimeout(timeout)
+                    .setConnectionRequestTimeout(timeout).build();
+            logger.debug("Sending request to NSSMF: " + content);
+            req = getHttpReq(url, methodType, header, config, content);
+            res = getHttpsClient().execute(req);
+
+            String resContent = null;
+            if (res.getEntity() != null) {
+                resContent = EntityUtils.toString(res.getEntity(), "UTF-8");
+            }
+
+            int statusCode = res.getStatusLine().getStatusCode();
+            String statusMessage = res.getStatusLine().getReasonPhrase();
+            logger.info("NSSMF Response: {} {}", statusCode,
+                    statusMessage + (resContent == null ? "" : System.lineSeparator() + resContent));
+
+            if (res.getStatusLine().getStatusCode() >= 300) {
+                String errMsg = "{\n  \"errorCode\": " + res.getStatusLine().getStatusCode()
+                        + "\n  \"errorDescription\": " + statusMessage + "\n}";
+                logError(errMsg);
+                return createResponse(statusCode, errMsg);
+            }
+            if (null != req) {
+                req.reset();
+            } else {
+                logger.debug("method is NULL:");
+            }
+            req = null;
+
+            return createResponse(statusCode, resContent);
+
+        } catch (SocketTimeoutException | ConnectTimeoutException e) {
+            String errMsg = "Request to NSSMF timed out";
+            logError(errMsg, e);
+            return createResponse(408, errMsg);
+        } catch (Exception e) {
+            String errMsg = "Error processing request to NSSMF";
+            logError(errMsg, e);
+            return createResponse(500, errMsg);
+        } finally {
+            if (res != null) {
+                try {
+                    EntityUtils.consume(res.getEntity());
+                } catch (Exception e) {
+                    logger.debug("Exception :", e);
+                }
+            }
+            if (req != null) {
+                try {
+                    req.reset();
+                } catch (Exception e) {
+                    logger.debug("Exception :", e);
+                }
+            }
+        }
+    }
+
+    private RestResponse createResponse(int statusCode, String errMsg) {
+        RestResponse restResponse = new RestResponse();
+        restResponse.setStatus(statusCode);
+        restResponse.setResponseContent(errMsg);
+        return restResponse;
+    }
+
+    private HttpRequestBase getHttpReq(String url, HttpMethod method, Header header, RequestConfig config,
+            String content) throws ApplicationException {
+        HttpRequestBase base = null;
+        switch (method) {
+            case POST:
+                HttpPost post = new HttpPost(url);
+                post.setEntity(new StringEntity(content, APPLICATION_JSON));
+                base = post;
+                break;
+
+            case GET:
+                base = new HttpGet(url);
+                break;
+
+            case PUT:
+                HttpPut put = new HttpPut(url);
+                put.setEntity(new StringEntity(content, APPLICATION_JSON));
+                base = put;
+                break;
+
+            case PATCH:
+                break;
+
+            case DELETE:
+                HttpDeleteWithBody delete = new HttpDeleteWithBody(url);
+                if (content != null) {
+                    delete.setEntity(new StringEntity(content, APPLICATION_JSON));
+                }
+                base = delete;
+                break;
+
+        }
+        base.setConfig(config);
+        if (header != null) {
+            base.setHeader(header);
+        }
+        return base;
+    }
+
+    class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {
+        public static final String METHOD_NAME = "DELETE";
+
+        public String getMethod() {
+            return METHOD_NAME;
+        }
+
+        public HttpDeleteWithBody(final String uri) {
+            super();
+            setURI(URI.create(uri));
+        }
+
+        public HttpDeleteWithBody(final URI uri) {
+            super();
+            setURI(uri);
+        }
+
+        public HttpDeleteWithBody() {
+            super();
+        }
+    }
+
+
+    public HttpClient getHttpsClient() {
+
+        TrustManager[] trustAllCerts = new TrustManager[] {new X509TrustManager() {
+            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
+                return null;
+            }
+
+            public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
+
+            public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
+        }};
+
+        // Install the all-trusting trust manager
+        try {
+            SSLContext sc = SSLContext.getInstance("SSL");
+            sc.init(null, trustAllCerts, new java.security.SecureRandom());
+            // HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
+
+            SSLConnectionSocketFactory sslsf =
+                    new SSLConnectionSocketFactory(sc, new String[] {"TLSv1"}, null, new TrustAllHostNameVerifier());
+            return HttpClients.custom().setSSLSocketFactory(sslsf).build();
+        } catch (Exception e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    private static void logError(String errMsg, Throwable t) {
+        logger.error(FOUR, RA_NS_EXC.toString(), NSSMI_ADAPTER, AvailabilityError.getValue(), errMsg, t);
+    }
+
+    private static void logError(String errMsg) {
+        logger.error(FOUR, RA_NS_EXC.toString(), NSSMI_ADAPTER, AvailabilityError.toString(), errMsg);
+    }
+}
+
diff --git a/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/TrustAllHostNameVerifier.java b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/TrustAllHostNameVerifier.java
new file mode 100644
index 0000000000..254186bda8
--- /dev/null
+++ b/adapters/mso-nssmf-adapter/src/main/java/org/onap/so/adapters/nssmf/rest/TrustAllHostNameVerifier.java
@@ -0,0 +1,32 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.nssmf.rest;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLSession;
+
+public class TrustAllHostNameVerifier implements HostnameVerifier {
+
+    public boolean verify(String hostname, SSLSession session) {
+        return true;
+    }
+
+}