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package org.onap.portal.service;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.codec.binary.Base64;
import org.onap.portal.domain.db.ep.EpMicroservice;
import org.onap.portal.domain.db.ep.EpMicroserviceParameter;
import org.onap.portal.domain.db.ep.EpWidgetCatalogParameter;
import org.onap.portal.domain.db.fn.FnUser;
import org.onap.portal.restTemplates.PortalWMSTemplate;
import org.onap.portal.service.microservice.EpMicroserviceService;
import org.onap.portal.service.widgetCatalogParameter.EpWidgetCatalogParameterService;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.portalsdk.core.onboarding.util.CipherUtil;
import org.onap.portalsdk.core.util.SystemProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestTemplate;
@Service
public class MicroserviceProxyService {
private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MicroserviceProxyService.class);
private static final String BASIC_AUTH = "Basic Authentication";
private static final String NO_AUTH = "No Authentication";
private static final String COOKIE_AUTH = "Cookie based Authentication";
private static final String QUESTION_MARK = "?";
private static final String ADD_MARK = "&";
private RestTemplate template = new RestTemplate();
private final EpMicroserviceService microserviceService;
private final EpWidgetCatalogParameterService widgetParameterService;
private final PortalWMSTemplate portalWMSTemplate;
@Autowired
public MicroserviceProxyService(EpMicroserviceService microserviceService,
EpWidgetCatalogParameterService widgetParameterService, WidgetMService widgetMService,
PortalWMSTemplate portalWMSTemplate) {
this.microserviceService = microserviceService;
this.widgetParameterService = widgetParameterService;
this.portalWMSTemplate = portalWMSTemplate;
}
public String proxyToDestination(long serviceId, FnUser user, HttpServletRequest request) throws Exception {
// get the microservice object by the id
Optional<EpMicroservice> data = microserviceService.getById(serviceId);
// No such microservice available
// can we return a better response than null?
return data
.map(epMicroservice -> authenticateAndRespond(epMicroservice, request, composeParams(epMicroservice, user)))
.orElse(null);
}
public String proxyToDestinationByWidgetId(long widgetId, FnUser user, HttpServletRequest request)
throws Exception {
ResponseEntity<Long> ans = portalWMSTemplate.proxyToDestinationByWidgetId(widgetId);
Long serviceId = ans.getBody();
// get the microservice object by the id
Optional<EpMicroservice> data = microserviceService.getById(serviceId);
// No such microservice available
if (!data.isPresent()) {
return null;
}
List<EpMicroserviceParameter> params = composeParams(data.get(), user);
for (EpMicroserviceParameter p : params) {
EpWidgetCatalogParameter userValue = widgetParameterService.getUserParamById(widgetId, user.getId(),
p.getId());
if (userValue != null) {
p.setParaValue(userValue.getUserValue());
}
}
return authenticateAndRespond(data.get(), request, params);
}
private String authenticateAndRespond(EpMicroservice data, HttpServletRequest request,
List<EpMicroserviceParameter> params) throws HttpClientErrorException, IllegalArgumentException {
String response = null;
switch (data.getSecurityType()) {
case NO_AUTH: {
HttpEntity<String> entity = new HttpEntity<>(headersForNoAuth());
String url = microserviceUrlConverter(data, params);
logger.debug(EELFLoggerDelegate.debugLogger,
"authenticateAndRespond: Before making no authentication call: {}", url);
response = template.exchange(url, HttpMethod.GET, entity, String.class).getBody();
logger.debug(EELFLoggerDelegate.debugLogger,
"authenticateAndRespond: No authentication call response: {}",
response);
break;
}
case BASIC_AUTH: {
// encoding the username and password
String plainCreds;
try {
plainCreds = data.getUsername() + ":" + decryptedPassword(data.getPassword());
} catch (Exception e) {
logger.error("authenticateAndRespond failed to decrypt password", e);
throw new IllegalArgumentException("Failed to decrypt password", e);
}
byte[] plainCredsBytes = plainCreds.getBytes();
byte[] base64CredsBytes = Base64.encodeBase64(plainCredsBytes);
String base64Creds = new String(base64CredsBytes);
HttpEntity<String> entity = new HttpEntity<>(headersForBasicAuth(request, base64Creds));
String url = microserviceUrlConverter(data, params);
try {
response = template.exchange(url, HttpMethod.GET, entity, String.class).getBody();
} catch (HttpClientErrorException e) {
logger.error("authenticateAndRespond failed for basic security url " + url, e);
throw e;
}
break;
}
case COOKIE_AUTH: {
HttpEntity<String> entity = new HttpEntity<>(headersForCookieAuth(request));
String url = microserviceUrlConverter(data, params);
try {
response = template.exchange(url, HttpMethod.GET, entity, String.class).getBody();
} catch (HttpClientErrorException e) {
logger.error("authenticateAndRespond failed for cookie auth url " + url, e);
throw e;
}
break;
}
}
return response;
}
private String decryptedPassword(String encryptedPwd) throws Exception {
String result = "";
if (encryptedPwd != null && encryptedPwd.length() > 0) {
try {
result = CipherUtil.decryptPKC(encryptedPwd,
SystemProperties.getProperty(SystemProperties.Decryption_Key));
} catch (Exception e) {
logger.error(EELFLoggerDelegate.errorLogger, "decryptedPassword failed", e);
throw e;
}
}
return result;
}
private String microserviceUrlConverter(EpMicroservice data, List<EpMicroserviceParameter> params) {
String url = data.getEndpointUrl();
for (int i = 0; i < params.size(); i++) {
if (i == 0) {
url += QUESTION_MARK;
}
url += params.get(i).getParaKey() + "=" + params.get(i).getParaValue();
if (i != (params.size() - 1)) {
url += ADD_MARK;
}
}
return url;
}
private HttpHeaders headersForNoAuth() {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
return headers;
}
// TODO: why is this generically named cookie used?
private final static String Cookie = "Cookie";
private HttpHeaders headersForBasicAuth(HttpServletRequest request, String base64Creds) {
HttpHeaders headers = new HttpHeaders();
headers.add("Authorization", "Basic " + base64Creds);
headers.setContentType(MediaType.APPLICATION_JSON);
String rawCookie = request.getHeader(Cookie);
if (rawCookie != null) {
headers.add(Cookie, rawCookie);
}
return headers;
}
private HttpHeaders headersForCookieAuth(HttpServletRequest request) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
String rawCookie = request.getHeader(Cookie);
if (rawCookie != null) {
headers.add(Cookie, rawCookie);
}
return headers;
}
private List<EpMicroserviceParameter> composeParams(EpMicroservice data, FnUser user) {
List<EpMicroserviceParameter> params = new ArrayList<>(data.getEpMicroserviceParameters());
EpMicroserviceParameter userIdParam = new EpMicroserviceParameter();
userIdParam.setParaKey("userId");
userIdParam.setParaValue(user.getOrgUserId());
params.add(userIdParam);
return params;
}
}
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