| /* |
| * Copyright (C) 2010 Google Inc. |
| * |
| * 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. |
| */ |
| package com.google.gson.rest.client; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Type; |
| import java.net.HttpURLConnection; |
| import java.util.Map; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import com.google.greaze.definition.HeaderMap; |
| import com.google.greaze.definition.HeaderMapSpec; |
| import com.google.greaze.definition.HttpMethod; |
| import com.google.greaze.definition.WebServiceSystemException; |
| import com.google.greaze.definition.rest.ID; |
| import com.google.greaze.definition.rest.RestRequest; |
| import com.google.greaze.definition.rest.RestResource; |
| import com.google.gson.Gson; |
| import com.google.gson.wsclient.internal.utils.Streams; |
| |
| /** |
| * Class to send Web service requests on a {@link HttpURLConnection}. |
| * |
| * @author inder |
| */ |
| public final class RestRequestSender { |
| private static final boolean SIMULATE_GET_WITH_POST = true; |
| private static final boolean SIMULATE_PUT_WITH_POST = true; |
| |
| private final Gson gson; |
| private final Logger logger; |
| private final Level logLevel; |
| |
| public RestRequestSender(Gson gson) { |
| this(gson, null); |
| } |
| |
| public RestRequestSender(Gson gson, Level logLevel) { |
| this.gson = gson; |
| logger = logLevel == null ? null : Logger.getLogger(RestRequestSender.class.getName()); |
| this.logLevel = logLevel; |
| } |
| |
| public <I extends ID, R extends RestResource<I, R>> void send( |
| HttpURLConnection conn, RestRequest<I, R> request) { |
| try { |
| HttpMethod method = request.getHttpMethod(); |
| if (SIMULATE_PUT_WITH_POST && method == HttpMethod.PUT) { |
| method = HttpMethod.POST; |
| setHeader(conn, HttpMethod.SIMULATED_METHOD_HEADER, HttpMethod.PUT.toString(), true); |
| } else if (SIMULATE_GET_WITH_POST && method == HttpMethod.GET) { |
| method = HttpMethod.POST; |
| setHeader(conn, HttpMethod.SIMULATED_METHOD_HEADER, HttpMethod.GET.toString(), true); |
| } |
| conn.setRequestMethod(method.toString()); |
| setHeader(conn, "Content-Type", request.getContentType(), true); |
| |
| // Assume conservatively that the response will need to be read. |
| // This is done here instead of in the response receiver because this property must be set |
| // before sending any data on the connection. |
| conn.setDoInput(true); |
| |
| R requestBody = request.getBody(); |
| String requestBodyContents = ""; |
| if (method == HttpMethod.POST || method == HttpMethod.PUT) { |
| // Android Java VM ignore Content-Length if setDoOutput is not set |
| conn.setDoOutput(true); |
| } |
| if (requestBody != null) { |
| requestBodyContents = gson.toJson(requestBody, request.getSpec().getResourceType()); |
| } |
| String contentLength = String.valueOf(requestBodyContents.length()); |
| setHeader(conn, "Content-Length", contentLength, true); |
| addRequestParams(conn, request.getHeaders()); |
| Streams.copy(requestBodyContents, conn.getOutputStream(), false); |
| |
| // Initiate the sending of the request. |
| conn.connect(); |
| } catch (IOException e) { |
| throw new WebServiceSystemException(e); |
| } |
| } |
| |
| private void addRequestParams(HttpURLConnection conn, HeaderMap requestParams) { |
| HeaderMapSpec spec = requestParams.getSpec(); |
| for (Map.Entry<String, Object> entry : requestParams.entrySet()) { |
| String paramName = entry.getKey(); |
| Type type = spec.getTypeFor(paramName); |
| Object value = entry.getValue(); |
| String json = gson.toJson(value, type); |
| setHeader(conn, paramName, json, false); |
| } |
| } |
| |
| private void setHeader(HttpURLConnection conn, String name, String value, boolean overwrite) { |
| if (logger != null) { |
| logger.log(logLevel, String.format("Request param: %s:%s", name, value)); |
| } |
| if (overwrite) { |
| conn.setRequestProperty(name, value); |
| } else { |
| conn.addRequestProperty(name, value); |
| } |
| } |
| } |