1、取得 代理
private ProxySelector proxySelector = ProxySelector.getDefault(); /** * The proxy selector to use. * * @return The proxy selector to use. */ public ProxySelector getProxySelector() { return proxySelector; } /** * Selects a proxy for the given URL. * * @param requestTokenURL The URL * @return The proxy. */ protected Proxy selectProxy(URL requestTokenURL) { try { List<Proxy> selectedProxies = getProxySelector().select(requestTokenURL.toURI()); return selectedProxies.isEmpty() ? Proxy.NO_PROXY : selectedProxies.get(0); } catch (URISyntaxException e) { throw new IllegalArgumentException(e); } }
2. 创建HTTP连接
/** * Open a connection to the given URL. * * @param requestTokenURL The request token URL. * @return The HTTP URL connection. */ protected HttpURLConnection openConnection(URL requestTokenURL) { try { HttpURLConnection connection = (HttpURLConnection) requestTokenURL.openConnection(selectProxy(requestTokenURL)); connection.setConnectTimeout(getConnectionTimeout()); connection.setReadTimeout(getReadTimeout()); return connection; } catch (IOException e) { throw new OAuthRequestFailedException("Failed to open an OAuth connection.", e); } }
3. 设置其他参数
/** * Read a resource. * * @param details The details of the resource. * @param url The URL of the resource. * @param httpMethod The http method. * @param token The token. * @param additionalParameters Any additional request parameters. * @param additionalRequestHeaders Any additional request parameters. * @return The resource. */ protected InputStream readResource(ProtectedResourceDetails details, URL url, String httpMethod, OAuthConsumerToken token, Map<String, String> additionalParameters, Map<String, String> additionalRequestHeaders) { url = configureURLForProtectedAccess(url, token, details, httpMethod, additionalParameters); String realm = details.getAuthorizationHeaderRealm(); boolean sendOAuthParamsInRequestBody = !details.isAcceptsAuthorizationHeader() && (("POST".equalsIgnoreCase(httpMethod) || "PUT".equalsIgnoreCase(httpMethod))); HttpURLConnection connection = openConnection(url); try { connection.setRequestMethod(httpMethod); } catch (ProtocolException e) { throw new IllegalStateException(e); } Map<String, String> reqHeaders = details.getAdditionalRequestHeaders(); if (reqHeaders != null) { for (Map.Entry<String, String> requestHeader : reqHeaders.entrySet()) { connection.setRequestProperty(requestHeader.getKey(), requestHeader.getValue()); } } if (additionalRequestHeaders != null) { for (Map.Entry<String, String> requestHeader : additionalRequestHeaders.entrySet()) { connection.setRequestProperty(requestHeader.getKey(), requestHeader.getValue()); } } int responseCode; String responseMessage; try { connection.setDoOutput(sendOAuthParamsInRequestBody); connection.connect(); if (sendOAuthParamsInRequestBody) { String queryString = getOAuthQueryString(details, token, url, httpMethod, additionalParameters); OutputStream out = connection.getOutputStream(); out.write(queryString.getBytes("UTF-8")); out.flush(); out.close(); } responseCode = connection.getResponseCode(); responseMessage = connection.getResponseMessage(); if (responseMessage == null) { responseMessage = "Unknown Error"; } } catch (IOException e) { throw new OAuthRequestFailedException("OAuth connection failed.", e); } if (responseCode >= 200 && responseCode < 300) { try { return connection.getInputStream(); } catch (IOException e) { throw new OAuthRequestFailedException("Unable to get the input stream from a successful response.", e); } } else if (responseCode == 400) { throw new OAuthRequestFailedException("OAuth authentication failed: " + responseMessage); } else if (responseCode == 401) { String authHeaderValue = connection.getHeaderField("WWW-Authenticate"); if (authHeaderValue != null) { Map<String, String> headerEntries = StringSplitUtils.splitEachArrayElementAndCreateMap(StringSplitUtils.splitIgnoringQuotes(authHeaderValue, ','), "=", "\""); String requiredRealm = headerEntries.get("realm"); if ((requiredRealm != null) && (!requiredRealm.equals(realm))) { throw new InvalidOAuthRealmException(String.format("Invalid OAuth realm. Provider expects \"%s\", when the resource details specify \"%s\".", requiredRealm, realm), requiredRealm); } } throw new OAuthRequestFailedException("OAuth authentication failed: " + responseMessage); } else { throw new OAuthRequestFailedException(String.format("Invalid response code %s (%s).", responseCode, responseMessage)); } }