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package {{invokerPackage}};
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
{{#openApiNullable}}
import org.openapitools.jackson.nullable.JsonNullableModule;
{{/openApiNullable}}
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpRequest;
import org.springframework.http.HttpStatus;
import org.springframework.http.InvalidMediaTypeException;
import org.springframework.http.MediaType;
import org.springframework.http.RequestEntity;
import org.springframework.http.RequestEntity.BodyBuilder;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.BufferingClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.codec.json.Jackson2JsonDecoder;
import org.springframework.http.codec.json.Jackson2JsonEncoder;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.StringUtils;
import org.springframework.http.client.reactive.ClientHttpRequest;
import org.springframework.web.client.RestClientException;
import org.springframework.web.util.UriComponentsBuilder;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.web.reactive.function.client.ClientResponse;
import org.springframework.web.reactive.function.BodyInserter;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.ExchangeStrategies;
import reactor.core.publisher.Mono;
import reactor.core.publisher.Flux;
import java.util.Optional;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TimeZone;
{{#jsr310}}
{{#threetenbp}}
import org.threeten.bp.OffsetDateTime;
{{/threetenbp}}
{{^threetenbp}}
import java.time.OffsetDateTime;
{{/threetenbp}}
{{/jsr310}}
import {{invokerPackage}}.auth.Authentication;
import {{invokerPackage}}.auth.HttpBasicAuth;
import {{invokerPackage}}.auth.HttpBearerAuth;
import {{invokerPackage}}.auth.ApiKeyAuth;
{{#hasOAuthMethods}}
import {{invokerPackage}}.auth.OAuth;
{{/hasOAuthMethods}}
{{>generatedAnnotation}}
public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
public enum CollectionFormat {
CSV(","), TSV("\t"), SSV(" "), PIPES("|"), MULTI(null);
private final String separator;
private CollectionFormat(String separator) {
this.separator = separator;
}
private String collectionToString(Collection collection) {
return StringUtils.collectionToDelimitedString(collection, separator);
}
}
private HttpHeaders defaultHeaders = new HttpHeaders();
private MultiValueMap defaultCookies = new LinkedMultiValueMap();
private String basePath = "{{basePath}}";
private final WebClient webClient;
private final DateFormat dateFormat;
private Map authentications;
public ApiClient() {
this.dateFormat = createDefaultDateFormat();
ObjectMapper mapper = new ObjectMapper();
mapper.setDateFormat(dateFormat);
mapper.registerModule(new JavaTimeModule());
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
{{#openApiNullable}}
JsonNullableModule jnm = new JsonNullableModule();
mapper.registerModule(jnm);
{{/openApiNullable}}
this.webClient = buildWebClient(mapper);
this.init();
}
public ApiClient(ObjectMapper mapper, DateFormat format) {
this(buildWebClient(mapper.copy()), format);
}
public ApiClient(WebClient webClient, ObjectMapper mapper, DateFormat format) {
this(Optional.ofNullable(webClient).orElseGet(() ->buildWebClient(mapper.copy())), format);
}
private ApiClient(WebClient webClient, DateFormat format) {
this.webClient = webClient;
this.dateFormat = format;
this.init();
}
public DateFormat createDefaultDateFormat() {
DateFormat dateFormat = new RFC3339DateFormat();
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
return dateFormat;
}
protected void init() {
// Setup authentications (key: authentication name, value: authentication).
authentications = new HashMap();{{#authMethods}}{{#isBasic}}{{#isBasicBasic}}
authentications.put("{{name}}", new HttpBasicAuth());{{/isBasicBasic}}{{^isBasicBasic}}
authentications.put("{{name}}", new HttpBearerAuth("{{scheme}}"));{{/isBasicBasic}}{{/isBasic}}{{#isApiKey}}
authentications.put("{{name}}", new ApiKeyAuth({{#isKeyInHeader}}"header"{{/isKeyInHeader}}{{#isKeyInQuery}}"query"{{/isKeyInQuery}}{{#isKeyInCookie}}"cookie"{{/isKeyInCookie}}, "{{keyParamName}}"));{{/isApiKey}}{{#isOAuth}}
authentications.put("{{name}}", new OAuth());{{/isOAuth}}{{/authMethods}}
// Prevent the authentications from being modified.
authentications = Collections.unmodifiableMap(authentications);
}
/**
* Build the WebClient used to make HTTP requests.
* @return WebClient
*/
public static WebClient buildWebClient(ObjectMapper mapper) {
ExchangeStrategies strategies = ExchangeStrategies
.builder()
.codecs(clientDefaultCodecsConfigurer -> {
clientDefaultCodecsConfigurer.defaultCodecs().jackson2JsonEncoder(new Jackson2JsonEncoder(mapper, MediaType.APPLICATION_JSON));
clientDefaultCodecsConfigurer.defaultCodecs().jackson2JsonDecoder(new Jackson2JsonDecoder(mapper, MediaType.APPLICATION_JSON));
}).build();
WebClient.Builder webClient = WebClient.builder().exchangeStrategies(strategies);
return webClient.build();
}
/**
* Get the current base path
* @return String the base path
*/
public String getBasePath() {
return basePath;
}
/**
* Set the base path, which should include the host
* @param basePath the base path
* @return ApiClient this client
*/
public ApiClient setBasePath(String basePath) {
this.basePath = basePath;
return this;
}
/**
* Get authentications (key: authentication name, value: authentication).
* @return Map the currently configured authentication types
*/
public Map getAuthentications() {
return authentications;
}
/**
* Get authentication for the given name.
*
* @param authName The authentication name
* @return The authentication, null if not found
*/
public Authentication getAuthentication(String authName) {
return authentications.get(authName);
}
/**
* Helper method to set access token for the first Bearer authentication.
* @param bearerToken Bearer token
*/
public void setBearerToken(String bearerToken) {
for (Authentication auth : authentications.values()) {
if (auth instanceof HttpBearerAuth) {
((HttpBearerAuth) auth).setBearerToken(bearerToken);
return;
}
}
throw new RuntimeException("No Bearer authentication configured!");
}
/**
* Helper method to set username for the first HTTP basic authentication.
* @param username the username
*/
public void setUsername(String username) {
for (Authentication auth : authentications.values()) {
if (auth instanceof HttpBasicAuth) {
((HttpBasicAuth) auth).setUsername(username);
return;
}
}
throw new RuntimeException("No HTTP basic authentication configured!");
}
/**
* Helper method to set password for the first HTTP basic authentication.
* @param password the password
*/
public void setPassword(String password) {
for (Authentication auth : authentications.values()) {
if (auth instanceof HttpBasicAuth) {
((HttpBasicAuth) auth).setPassword(password);
return;
}
}
throw new RuntimeException("No HTTP basic authentication configured!");
}
/**
* Helper method to set API key value for the first API key authentication.
* @param apiKey the API key
*/
public void setApiKey(String apiKey) {
for (Authentication auth : authentications.values()) {
if (auth instanceof ApiKeyAuth) {
((ApiKeyAuth) auth).setApiKey(apiKey);
return;
}
}
throw new RuntimeException("No API key authentication configured!");
}
/**
* Helper method to set API key prefix for the first API key authentication.
* @param apiKeyPrefix the API key prefix
*/
public void setApiKeyPrefix(String apiKeyPrefix) {
for (Authentication auth : authentications.values()) {
if (auth instanceof ApiKeyAuth) {
((ApiKeyAuth) auth).setApiKeyPrefix(apiKeyPrefix);
return;
}
}
throw new RuntimeException("No API key authentication configured!");
}
{{#hasOAuthMethods}}
/**
* Helper method to set access token for the first OAuth2 authentication.
* @param accessToken the access token
*/
public void setAccessToken(String accessToken) {
for (Authentication auth : authentications.values()) {
if (auth instanceof OAuth) {
((OAuth) auth).setAccessToken(accessToken);
return;
}
}
throw new RuntimeException("No OAuth2 authentication configured!");
}
{{/hasOAuthMethods}}
/**
* Set the User-Agent header's value (by adding to the default header map).
* @param userAgent the user agent string
* @return ApiClient this client
*/
public ApiClient setUserAgent(String userAgent) {
addDefaultHeader("User-Agent", userAgent);
return this;
}
/**
* Add a default header.
*
* @param name The header's name
* @param value The header's value
* @return ApiClient this client
*/
public ApiClient addDefaultHeader(String name, String value) {
if (defaultHeaders.containsKey(name)) {
defaultHeaders.remove(name);
}
defaultHeaders.add(name, value);
return this;
}
/**
* Add a default cookie.
*
* @param name The cookie's name
* @param value The cookie's value
* @return ApiClient this client
*/
public ApiClient addDefaultCookie(String name, String value) {
if (defaultCookies.containsKey(name)) {
defaultCookies.remove(name);
}
defaultCookies.add(name, value);
return this;
}
/**
* Get the date format used to parse/format date parameters.
* @return DateFormat format
*/
public DateFormat getDateFormat() {
return dateFormat;
}
/**
* Parse the given string into Date object.
*/
public Date parseDate(String str) {
try {
return dateFormat.parse(str);
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
/**
* Format the given Date object into string.
*/
public String formatDate(Date date) {
return dateFormat.format(date);
}
/**
* Format the given parameter object into string.
* @param param the object to convert
* @return String the parameter represented as a String
*/
public String parameterToString(Object param) {
if (param == null) {
return "";
} else if (param instanceof Date) {
return formatDate( (Date) param);
} {{#jsr310}}else if (param instanceof OffsetDateTime) {
return formatOffsetDateTime((OffsetDateTime) param);
} {{/jsr310}}else if (param instanceof Collection) {
StringBuilder b = new StringBuilder();
for(Object o : (Collection) param) {
if(b.length() > 0) {
b.append(",");
}
b.append(String.valueOf(o));
}
return b.toString();
} else {
return String.valueOf(param);
}
}
/**
* Converts a parameter to a {@link MultiValueMap} for use in REST requests
* @param collectionFormat The format to convert to
* @param name The name of the parameter
* @param value The parameter's value
* @return a Map containing the String value(s) of the input parameter
*/
public MultiValueMap parameterToMultiValueMap(CollectionFormat collectionFormat, String name, Object value) {
final MultiValueMap params = new LinkedMultiValueMap();
if (name == null || name.isEmpty() || value == null) {
return params;
}
if(collectionFormat == null) {
collectionFormat = CollectionFormat.CSV;
}
Collection valueCollection = null;
if (value instanceof Collection) {
valueCollection = (Collection) value;
} else {
params.add(name, parameterToString(value));
return params;
}
if (valueCollection.isEmpty()){
return params;
}
if (collectionFormat.equals(CollectionFormat.MULTI)) {
for (Object item : valueCollection) {
params.add(name, parameterToString(item));
}
return params;
}
List values = new ArrayList();
for(Object o : valueCollection) {
values.add(parameterToString(o));
}
params.add(name, collectionFormat.collectionToString(values));
return params;
}
/**
* Check if the given {@code String} is a JSON MIME.
* @param mediaType the input MediaType
* @return boolean true if the MediaType represents JSON, false otherwise
*/
public boolean isJsonMime(String mediaType) {
// "* / *" is default to JSON
if ("*/*".equals(mediaType)) {
return true;
}
try {
return isJsonMime(MediaType.parseMediaType(mediaType));
} catch (InvalidMediaTypeException e) {
}
return false;
}
/**
* Check if the given MIME is a JSON MIME.
* JSON MIME examples:
* application/json
* application/json; charset=UTF8
* APPLICATION/JSON
* @param mediaType the input MediaType
* @return boolean true if the MediaType represents JSON, false otherwise
*/
public boolean isJsonMime(MediaType mediaType) {
return mediaType != null && (MediaType.APPLICATION_JSON.isCompatibleWith(mediaType) || mediaType.getSubtype().matches("^.*\\+json[;]?\\s*$"));
}
/**
* Select the Accept header's value from the given accepts array:
* if JSON exists in the given array, use it;
* otherwise use all of them (joining into a string)
*
* @param accepts The accepts array to select from
* @return List The list of MediaTypes to use for the Accept header
*/
public List selectHeaderAccept(String[] accepts) {
if (accepts.length == 0) {
return null;
}
for (String accept : accepts) {
MediaType mediaType = MediaType.parseMediaType(accept);
if (isJsonMime(mediaType)) {
return Collections.singletonList(mediaType);
}
}
return MediaType.parseMediaTypes(StringUtils.arrayToCommaDelimitedString(accepts));
}
/**
* Select the Content-Type header's value from the given array:
* if JSON exists in the given array, use it;
* otherwise use the first one of the array.
*
* @param contentTypes The Content-Type array to select from
* @return MediaType The Content-Type header to use. If the given array is empty, null will be returned.
*/
public MediaType selectHeaderContentType(String[] contentTypes) {
if (contentTypes.length == 0) {
return null;
}
for (String contentType : contentTypes) {
MediaType mediaType = MediaType.parseMediaType(contentType);
if (isJsonMime(mediaType)) {
return mediaType;
}
}
return MediaType.parseMediaType(contentTypes[0]);
}
/**
* Select the body to use for the request
* @param obj the body object
* @param formParams the form parameters
* @param contentType the content type of the request
* @return Object the selected body
*/
protected BodyInserter selectBody(Object obj, MultiValueMap formParams, MediaType contentType) {
if(MediaType.APPLICATION_FORM_URLENCODED.equals(contentType)) {
MultiValueMap map = new LinkedMultiValueMap<>();
formParams
.toSingleValueMap()
.entrySet()
.forEach(es -> map.add(es.getKey(), String.valueOf(es.getValue())));
return BodyInserters.fromFormData(map);
} else if(MediaType.MULTIPART_FORM_DATA.equals(contentType)) {
return BodyInserters.fromMultipartData(formParams);
} else {
return obj != null ? BodyInserters.fromObject(obj) : null;
}
}
/**
* Invoke API by sending HTTP request with the given options.
*
* @param the return type to use
* @param path The sub-path of the HTTP URL
* @param method The request method
* @param pathParams The path parameters
* @param queryParams The query parameters
* @param body The request body object
* @param headerParams The header parameters
* @param formParams The form parameters
* @param accept The request's Accept header
* @param contentType The request's Content-Type header
* @param authNames The authentications to apply
* @param returnType The return type into which to deserialize the response
* @return The response body in chosen type
*/
public Mono invokeAPI(String path, HttpMethod method, Map pathParams, MultiValueMap queryParams, Object body, HttpHeaders headerParams, MultiValueMap cookieParams, MultiValueMap formParams, List accept, MediaType contentType, String[] authNames, ParameterizedTypeReference returnType) throws RestClientException {
final WebClient.RequestBodySpec requestBuilder = prepareRequest(path, method, pathParams, queryParams, body, headerParams, cookieParams, formParams, accept, contentType, authNames);
return requestBuilder.retrieve().bodyToMono(returnType);
}
/**
* Invoke API by sending HTTP request with the given options.
*
* @param the return type to use
* @param path The sub-path of the HTTP URL
* @param method The request method
* @param pathParams The path parameters
* @param queryParams The query parameters
* @param body The request body object
* @param headerParams The header parameters
* @param formParams The form parameters
* @param accept The request's Accept header
* @param contentType The request's Content-Type header
* @param authNames The authentications to apply
* @param returnType The return type into which to deserialize the response
* @return The response body in chosen type
*/
public Flux invokeFluxAPI(String path, HttpMethod method, Map pathParams, MultiValueMap queryParams, Object body, HttpHeaders headerParams, MultiValueMap cookieParams, MultiValueMap formParams, List accept, MediaType contentType, String[] authNames, ParameterizedTypeReference returnType) throws RestClientException {
final WebClient.RequestBodySpec requestBuilder = prepareRequest(path, method, pathParams, queryParams, body, headerParams, cookieParams, formParams, accept, contentType, authNames);
return requestBuilder.retrieve().bodyToFlux(returnType);
}
private WebClient.RequestBodySpec prepareRequest(String path, HttpMethod method, Map pathParams, MultiValueMap queryParams, Object body, HttpHeaders headerParams, MultiValueMap cookieParams, MultiValueMap formParams, List accept, MediaType contentType, String[] authNames) {
updateParamsForAuth(authNames, queryParams, headerParams, cookieParams);
final UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(basePath).path(path);
if (queryParams != null) {
builder.queryParams(queryParams);
}
final WebClient.RequestBodySpec requestBuilder = webClient.method(method).uri(builder.encode().toUriString(), pathParams);
if(accept != null) {
requestBuilder.accept(accept.toArray(new MediaType[accept.size()]));
}
if(contentType != null) {
requestBuilder.contentType(contentType);
}
addHeadersToRequest(headerParams, requestBuilder);
addHeadersToRequest(defaultHeaders, requestBuilder);
addCookiesToRequest(cookieParams, requestBuilder);
addCookiesToRequest(defaultCookies, requestBuilder);
requestBuilder.body(selectBody(body, formParams, contentType));
return requestBuilder;
}
/**
* Add headers to the request that is being built
* @param headers The headers to add
* @param requestBuilder The current request
*/
protected void addHeadersToRequest(HttpHeaders headers, WebClient.RequestBodySpec requestBuilder) {
for (Entry> entry : headers.entrySet()) {
List values = entry.getValue();
for(String value : values) {
if (value != null) {
requestBuilder.header(entry.getKey(), value);
}
}
}
}
/**
* Add cookies to the request that is being built
* @param cookies The cookies to add
* @param requestBuilder The current request
*/
protected void addCookiesToRequest(MultiValueMap cookies, WebClient.RequestBodySpec requestBuilder) {
for (Entry> entry : cookies.entrySet()) {
List values = entry.getValue();
for(String value : values) {
if (value != null) {
requestBuilder.cookie(entry.getKey(), value);
}
}
}
}
/**
* Update query and header parameters based on authentication settings.
*
* @param authNames The authentications to apply
* @param queryParams The query parameters
* @param headerParams The header parameters
* @param cookieParams the cookie parameters
*/
private void updateParamsForAuth(String[] authNames, MultiValueMap queryParams, HttpHeaders headerParams, MultiValueMap cookieParams) {
for (String authName : authNames) {
Authentication auth = authentications.get(authName);
if (auth == null) {
throw new RestClientException("Authentication undefined: " + authName);
}
auth.applyToParams(queryParams, headerParams, cookieParams);
}
}
/**
* Formats the specified collection path parameter to a string value.
*
* @param collectionFormat The collection format of the parameter.
* @param values The values of the parameter.
* @return String representation of the parameter
*/
public String collectionPathParameterToString(CollectionFormat collectionFormat, Collection values) {
// create the value based on the collection format
if (CollectionFormat.MULTI.equals(collectionFormat)) {
// not valid for path params
return parameterToString(values);
}
// collectionFormat is assumed to be "csv" by default
if(collectionFormat == null) {
collectionFormat = CollectionFormat.CSV;
}
return collectionFormat.collectionToString(values);
}
}
