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replace http client implementation with interface (apolloconfig#3594)
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169 changes: 169 additions & 0 deletions
169
apollo-client/src/main/java/com/ctrip/framework/apollo/util/http/DefaultHttpClient.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,169 @@ | ||
| package com.ctrip.framework.apollo.util.http; | ||
|
|
||
| import com.ctrip.framework.apollo.build.ApolloInjector; | ||
| import com.ctrip.framework.apollo.exceptions.ApolloConfigException; | ||
| import com.ctrip.framework.apollo.exceptions.ApolloConfigStatusCodeException; | ||
| import com.ctrip.framework.apollo.util.ConfigUtil; | ||
| import com.google.common.base.Function; | ||
| import com.google.common.io.CharStreams; | ||
| import com.google.gson.Gson; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.lang.reflect.Type; | ||
| import java.net.HttpURLConnection; | ||
| import java.net.URL; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * @author Jason Song([email protected]) | ||
| */ | ||
| public class DefaultHttpClient implements HttpClient { | ||
| private ConfigUtil m_configUtil; | ||
| private static final Gson GSON = new Gson(); | ||
|
|
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| /** | ||
| * Constructor. | ||
| */ | ||
| public DefaultHttpClient() { | ||
| m_configUtil = ApolloInjector.getInstance(ConfigUtil.class); | ||
| } | ||
|
|
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| /** | ||
| * Do get operation for the http request. | ||
| * | ||
| * @param httpRequest the request | ||
| * @param responseType the response type | ||
| * @return the response | ||
| * @throws ApolloConfigException if any error happened or response code is neither 200 nor 304 | ||
| */ | ||
| @Override | ||
| public <T> HttpResponse<T> doGet(HttpRequest httpRequest, final Class<T> responseType) { | ||
| Function<String, T> convertResponse = new Function<String, T>() { | ||
| @Override | ||
| public T apply(String input) { | ||
| return GSON.fromJson(input, responseType); | ||
| } | ||
| }; | ||
|
|
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| return doGetWithSerializeFunction(httpRequest, convertResponse); | ||
| } | ||
|
|
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| /** | ||
| * Do get operation for the http request. | ||
| * | ||
| * @param httpRequest the request | ||
| * @param responseType the response type | ||
| * @return the response | ||
| * @throws ApolloConfigException if any error happened or response code is neither 200 nor 304 | ||
| */ | ||
| @Override | ||
| public <T> HttpResponse<T> doGet(HttpRequest httpRequest, final Type responseType) { | ||
| Function<String, T> convertResponse = new Function<String, T>() { | ||
| @Override | ||
| public T apply(String input) { | ||
| return GSON.fromJson(input, responseType); | ||
| } | ||
| }; | ||
|
|
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| return doGetWithSerializeFunction(httpRequest, convertResponse); | ||
| } | ||
|
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| private <T> HttpResponse<T> doGetWithSerializeFunction(HttpRequest httpRequest, | ||
| Function<String, T> serializeFunction) { | ||
| InputStreamReader isr = null; | ||
| InputStreamReader esr = null; | ||
| int statusCode; | ||
| try { | ||
| HttpURLConnection conn = (HttpURLConnection) new URL(httpRequest.getUrl()).openConnection(); | ||
|
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| conn.setRequestMethod("GET"); | ||
|
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| Map<String, String> headers = httpRequest.getHeaders(); | ||
| if (headers != null && headers.size() > 0) { | ||
| for (Map.Entry<String, String> entry : headers.entrySet()) { | ||
| conn.setRequestProperty(entry.getKey(), entry.getValue()); | ||
| } | ||
| } | ||
|
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| int connectTimeout = httpRequest.getConnectTimeout(); | ||
| if (connectTimeout < 0) { | ||
| connectTimeout = m_configUtil.getConnectTimeout(); | ||
| } | ||
|
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| int readTimeout = httpRequest.getReadTimeout(); | ||
| if (readTimeout < 0) { | ||
| readTimeout = m_configUtil.getReadTimeout(); | ||
| } | ||
|
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| conn.setConnectTimeout(connectTimeout); | ||
| conn.setReadTimeout(readTimeout); | ||
|
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| conn.connect(); | ||
|
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| statusCode = conn.getResponseCode(); | ||
| String response; | ||
|
|
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| try { | ||
| isr = new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8); | ||
| response = CharStreams.toString(isr); | ||
| } catch (IOException ex) { | ||
| /** | ||
| * according to https://docs.oracle.com/javase/7/docs/technotes/guides/net/http-keepalive.html, | ||
| * we should clean up the connection by reading the response body so that the connection | ||
| * could be reused. | ||
| */ | ||
| InputStream errorStream = conn.getErrorStream(); | ||
|
|
||
| if (errorStream != null) { | ||
| esr = new InputStreamReader(errorStream, StandardCharsets.UTF_8); | ||
| try { | ||
| CharStreams.toString(esr); | ||
| } catch (IOException ioe) { | ||
| //ignore | ||
| } | ||
| } | ||
|
|
||
| // 200 and 304 should not trigger IOException, thus we must throw the original exception out | ||
| if (statusCode == 200 || statusCode == 304) { | ||
| throw ex; | ||
| } | ||
| // for status codes like 404, IOException is expected when calling conn.getInputStream() | ||
| throw new ApolloConfigStatusCodeException(statusCode, ex); | ||
| } | ||
|
|
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| if (statusCode == 200) { | ||
| return new HttpResponse<>(statusCode, serializeFunction.apply(response)); | ||
| } | ||
|
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| if (statusCode == 304) { | ||
| return new HttpResponse<>(statusCode, null); | ||
| } | ||
| } catch (ApolloConfigStatusCodeException ex) { | ||
| throw ex; | ||
| } catch (Throwable ex) { | ||
| throw new ApolloConfigException("Could not complete get operation", ex); | ||
| } finally { | ||
| if (isr != null) { | ||
| try { | ||
| isr.close(); | ||
| } catch (IOException ex) { | ||
| // ignore | ||
| } | ||
| } | ||
|
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| if (esr != null) { | ||
| try { | ||
| esr.close(); | ||
| } catch (IOException ex) { | ||
| // ignore | ||
| } | ||
| } | ||
| } | ||
|
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| throw new ApolloConfigStatusCodeException(statusCode, | ||
| String.format("Get operation failed for %s", httpRequest.getUrl())); | ||
| } | ||
|
|
||
| } |
32 changes: 32 additions & 0 deletions
32
apollo-client/src/main/java/com/ctrip/framework/apollo/util/http/HttpClient.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| package com.ctrip.framework.apollo.util.http; | ||
|
|
||
| import com.ctrip.framework.apollo.exceptions.ApolloConfigException; | ||
| import java.lang.reflect.Type; | ||
|
|
||
| /** | ||
| * @author Jason Song([email protected]) | ||
| */ | ||
| public interface HttpClient { | ||
|
|
||
| /** | ||
| * Do get operation for the http request. | ||
| * | ||
| * @param httpRequest the request | ||
| * @param responseType the response type | ||
| * @return the response | ||
| * @throws ApolloConfigException if any error happened or response code is neither 200 nor 304 | ||
| */ | ||
| <T> HttpResponse<T> doGet(HttpRequest httpRequest, final Class<T> responseType) | ||
| throws ApolloConfigException; | ||
|
|
||
| /** | ||
| * Do get operation for the http request. | ||
| * | ||
| * @param httpRequest the request | ||
| * @param responseType the response type | ||
| * @return the response | ||
| * @throws ApolloConfigException if any error happened or response code is neither 200 nor 304 | ||
| */ | ||
| <T> HttpResponse<T> doGet(HttpRequest httpRequest, final Type responseType) | ||
| throws ApolloConfigException; | ||
| } |
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