| // Copyright 2011 Google Inc. All Rights Reserved. |
| // |
| // 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.enterprise.adaptor; |
| |
| import com.google.common.collect.ListMultimap; |
| import com.google.enterprise.adaptor.secmgr.http.HttpClientInterface; |
| import com.google.enterprise.adaptor.secmgr.http.HttpExchange; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.Reader; |
| import java.net.HttpURLConnection; |
| import java.net.URL; |
| import java.net.URLEncoder; |
| import java.nio.charset.Charset; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Allows communicating with HTTP servers. |
| */ |
| class HttpClientAdapter implements HttpClientInterface { |
| private static final String POST_ENCODING = "UTF-8"; |
| |
| @Override |
| public HttpExchange postExchange(URL url, |
| ListMultimap<String, String> parameters) { |
| HttpExchange exchange = new ClientExchange(url, "POST"); |
| if (parameters != null) { |
| exchange.setRequestHeader("Content-Type", |
| "application/x-www-form-urlencoded; charset=" + POST_ENCODING); |
| for (String name : parameters.keySet()) { |
| for (String value : parameters.get(name)) { |
| exchange.addParameter(name, value); |
| } |
| } |
| } |
| return exchange; |
| } |
| |
| private static class ClientExchange implements HttpExchange { |
| private final URL url; |
| private final String method; |
| private final HttpURLConnection conn; |
| private byte[] requestBody; |
| /** POST parameters */ |
| // Alternates between key and value |
| private List<String> parameters = new ArrayList<String>(); |
| private boolean connected = false; |
| |
| public ClientExchange(URL url, String method) { |
| this.url = url; |
| this.method = method; |
| try { |
| conn = (HttpURLConnection) url.openConnection(); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| conn.setDoOutput(true); |
| conn.setDoInput(true); |
| } |
| |
| @Override |
| public void setProxy(String proxy) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void setBasicAuthCredentials(String username, String password) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void setFollowRedirects(boolean followRedirects) { |
| conn.setFollowRedirects(followRedirects); |
| } |
| |
| @Override |
| public void setTimeout(int timeout) { |
| conn.setConnectTimeout(timeout); |
| conn.setReadTimeout(timeout); |
| } |
| |
| @Override |
| public String getHttpMethod() { |
| return method; |
| } |
| |
| @Override |
| public URL getUrl() { |
| return url; |
| } |
| |
| @Override |
| public void addParameter(String name, String value) { |
| if (!"POST".equals(method)) { |
| throw new IllegalStateException(); |
| } |
| parameters.add(name); |
| parameters.add(value); |
| } |
| |
| @Override |
| public void addRequestHeader(String name, String value) { |
| conn.addRequestProperty(name, value); |
| } |
| |
| @Override |
| public void setRequestHeader(String name, String value) { |
| conn.setRequestProperty(name, value); |
| } |
| |
| @Override |
| public List<String> getRequestHeaderValues(String headerName) { |
| return conn.getRequestProperties().get(headerName); |
| } |
| |
| @Override |
| public String getRequestHeaderValue(String headerName) { |
| return conn.getRequestProperty(headerName); |
| } |
| |
| /** Does not copy provided byte array. */ |
| @Override |
| public void setRequestBody(byte[] byteArrayRequestEntity) { |
| requestBody = byteArrayRequestEntity; |
| } |
| |
| @Override |
| public int exchange() throws IOException { |
| if (parameters.size() > 0) { |
| if (requestBody != null) { |
| // We are about to encode the parameters into a byte[] for the |
| // requestBody. Thus, having parameters is equivalent to having a |
| // requestBody, and we can't have both. |
| throw new IllegalStateException(); |
| } |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < parameters.size(); i += 2) { |
| String name = parameters.get(i); |
| String value = parameters.get(i + 1); |
| sb.append(URLEncoder.encode(name, POST_ENCODING)); |
| sb.append("="); |
| sb.append(URLEncoder.encode(value, POST_ENCODING)); |
| sb.append("&"); |
| } |
| String formData = sb.substring(0, sb.length() - 1); |
| setRequestBody(formData.getBytes(Charset.forName("UTF-8"))); |
| } |
| conn.connect(); |
| connected = true; |
| OutputStream os = conn.getOutputStream(); |
| try { |
| if (requestBody != null) { |
| os.write(requestBody); |
| } |
| } finally { |
| os.close(); |
| } |
| return conn.getResponseCode(); |
| } |
| |
| @Override |
| public String getResponseEntityAsString() throws IOException { |
| Charset charset = Charset.forName(conn.getContentEncoding()); |
| if (charset == null) { |
| throw new RuntimeException("Unknown charset: " + charset); |
| } |
| InputStream is = getResponseEntityAsStream(); |
| StringBuilder sb = new StringBuilder(); |
| Reader reader = new InputStreamReader(is, charset); |
| try { |
| char[] buf = new char[1024]; |
| int read; |
| while ((read = reader.read(buf)) != -1) { |
| sb.append(buf, 0, read); |
| } |
| } finally { |
| reader.close(); |
| } |
| return sb.toString(); |
| } |
| |
| @Override |
| public InputStream getResponseEntityAsStream() throws IOException { |
| return conn.getInputStream(); |
| } |
| |
| @Override |
| public List<String> getResponseHeaderValues(String headerName) { |
| return conn.getHeaderFields().get(headerName); |
| } |
| |
| @Override |
| public String getResponseHeaderValue(String headerName) { |
| // Returns last instead of first header if there are multiple headers with |
| // same name. |
| return conn.getHeaderField(headerName); |
| } |
| |
| @Override |
| public ListMultimap<String, String> getResponseHeaders() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getStatusCode() { |
| try { |
| return conn.getResponseCode(); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| @Override |
| public void close() { |
| if (connected) { |
| try { |
| conn.getInputStream().close(); |
| } catch (IOException ex) { |
| // Ignore. |
| } |
| } |
| } |
| } |
| } |