android-java.apiInvoker.mustache Maven / Gradle / Ivy
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package {{invokerPackage}};
import com.fasterxml.jackson.core.JsonGenerator.Feature;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import org.apache.http.*;
import org.apache.http.client.*;
import org.apache.http.client.methods.*;
import org.apache.http.conn.*;
import org.apache.http.conn.scheme.*;
import org.apache.http.conn.ssl.*;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.*;
import org.apache.http.impl.conn.*;
import org.apache.http.params.*;
import org.apache.http.util.EntityUtils;
import java.io.File;
import java.net.Socket;
import java.net.UnknownHostException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
public class ApiInvoker {
private static ApiInvoker INSTANCE = new ApiInvoker();
private Map defaultHeaderMap = new HashMap();
private HttpClient client = null;
private boolean ignoreSSLCertificates = false;
private ClientConnectionManager ignoreSSLConnectionManager;
public ApiInvoker() {
initConnectionManager();
}
public static ApiInvoker getInstance() {
return INSTANCE;
}
public void ignoreSSLCertificates(boolean ignoreSSLCertificates) {
this.ignoreSSLCertificates = ignoreSSLCertificates;
}
public void addDefaultHeader(String key, String value) {
defaultHeaderMap.put(key, value);
}
public String escapeString(String str) {
return str;
}
public static Object deserialize(String json, String containerType, Class cls) throws ApiException {
try{
if("List".equals(containerType)) {
JavaType typeInfo = JsonUtil.getJsonMapper().getTypeFactory().constructCollectionType(List.class, cls);
List response = (List) JsonUtil.getJsonMapper().readValue(json, typeInfo);
return response;
}
else if(String.class.equals(cls)) {
if(json != null && json.startsWith("\"") && json.endsWith("\"") && json.length() > 1)
return json.substring(1, json.length() - 2);
else
return json;
}
else {
return JsonUtil.getJsonMapper().readValue(json, cls);
}
}
catch (IOException e) {
throw new ApiException(500, e.getMessage());
}
}
public static String serialize(Object obj) throws ApiException {
try {
if (obj != null)
return JsonUtil.getJsonMapper().writeValueAsString(obj);
else
return null;
}
catch (Exception e) {
throw new ApiException(500, e.getMessage());
}
}
public String invokeAPI(String host, String path, String method, Map queryParams, Object body, Map headerParams, String contentType) throws ApiException {
HttpClient client = getClient(host);
StringBuilder b = new StringBuilder();
for(String key : queryParams.keySet()) {
String value = queryParams.get(key);
if (value != null){
if(b.toString().length() == 0)
b.append("?");
else
b.append("&");
b.append(escapeString(key)).append("=").append(escapeString(value));
}
}
String url = host + path + b.toString();
HashMap headers = new HashMap();
for(String key : headerParams.keySet()) {
headers.put(key, headerParams.get(key));
}
for(String key : defaultHeaderMap.keySet()) {
if(!headerParams.containsKey(key)) {
headers.put(key, defaultHeaderMap.get(key));
}
}
headers.put("Accept", "application/json");
HttpResponse response = null;
try{
if("GET".equals(method)) {
HttpGet get = new HttpGet(url);
get.addHeader("Accept", "application/json");
for(String key : headers.keySet()) {
get.setHeader(key, headers.get(key));
}
response = client.execute(get);
}
else if ("POST".equals(method)) {
HttpPost post = new HttpPost(url);
if (body != null) {
post.setHeader("Content-Type", contentType);
post.setEntity(new StringEntity(serialize(body), "UTF-8"));
}
for(String key : headers.keySet()) {
post.setHeader(key, headers.get(key));
}
response = client.execute(post);
}
else if ("PUT".equals(method)) {
HttpPut put = new HttpPut(url);
if(body != null) {
put.setHeader("Content-Type", contentType);
put.setEntity(new StringEntity(serialize(body), "UTF-8"));
}
for(String key : headers.keySet()) {
put.setHeader(key, headers.get(key));
}
response = client.execute(put);
}
else if ("DELETE".equals(method)) {
HttpDelete delete = new HttpDelete(url);
for(String key : headers.keySet()) {
delete.setHeader(key, headers.get(key));
}
response = client.execute(delete);
}
else if ("PATCH".equals(method)) {
HttpPatch patch = new HttpPatch(url);
if (body != null) {
patch.setHeader("Content-Type", contentType);
patch.setEntity(new StringEntity(serialize(body), "UTF-8"));
}
for(String key : headers.keySet()) {
patch.setHeader(key, headers.get(key));
}
response = client.execute(patch);
}
int code = response.getStatusLine().getStatusCode();
String responseString = null;
if(code == 204)
responseString = "";
else if(code >= 200 && code < 300) {
if(response.getEntity() != null) {
HttpEntity resEntity = response.getEntity();
responseString = EntityUtils.toString(resEntity);
}
}
else {
if(response.getEntity() != null) {
HttpEntity resEntity = response.getEntity();
responseString = EntityUtils.toString(resEntity);
}
else
responseString = "no data";
throw new ApiException(code, responseString);
}
return responseString;
}
catch(IOException e) {
throw new ApiException(500, e.getMessage());
}
}
private HttpClient getClient(String host) {
if (client == null) {
if (ignoreSSLCertificates && ignoreSSLConnectionManager != null) {
// Trust self signed certificates
client = new DefaultHttpClient(ignoreSSLConnectionManager, new BasicHttpParams());
} else {
client = new DefaultHttpClient();
}
}
return client;
}
private void initConnectionManager() {
try {
final SSLContext sslContext = SSLContext.getInstance("SSL");
// set up a TrustManager that trusts everything
TrustManager[] trustManagers = new TrustManager[] {
new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) {}
public void checkServerTrusted(X509Certificate[] certs, String authType) {}
}};
sslContext.init(null, trustManagers, new SecureRandom());
SSLSocketFactory sf = new SSLSocketFactory((KeyStore)null) {
private javax.net.ssl.SSLSocketFactory sslFactory = sslContext.getSocketFactory();
public Socket createSocket(Socket socket, String host, int port, boolean autoClose)
throws IOException, UnknownHostException {
return sslFactory.createSocket(socket, host, port, autoClose);
}
public Socket createSocket() throws IOException {
return sslFactory.createSocket();
}
};
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
Scheme httpsScheme = new Scheme("https", sf, 443);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(httpsScheme);
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
ignoreSSLConnectionManager = new SingleClientConnManager(new BasicHttpParams(), schemeRegistry);
} catch (NoSuchAlgorithmException e) {
// This will only be thrown if SSL isn't available for some reason.
} catch (KeyManagementException e) {
// This might be thrown when passing a key into init(), but no key is being passed.
} catch (GeneralSecurityException e) {
// This catches anything else that might go wrong.
// If anything goes wrong we default to the standard connection manager.
}
}
}