Question

我正在尝试实现基于Oauth2的Web服务。我有clientID，clientSecret，授权端点，令牌端点和回调Url（自定义架构指向Android本机页面）。当我检查其他基于Oauth2的API时，它有登录Url，它将被重定向到登录网页。但在我的情况下，没有登录URL，但应将其重定向到本机登录页面，并且在成功响应时，应将其重定向到登录本机页面。如何使用Oauth2获取访问令牌？任何帮助将不胜感激。

Answer 1

从上面的评论中，我们假设您已经将ASP.NET WebAPI作为服务器端应用程序，如果您的Android客户端应用程序使用HttpUrlConnection，您可以参考以下示例代码（当然，您将需要修改更多以使其符合您的要求）：

            String address = "http://<IP>:<PORT>/token";
            HttpURLConnection urlConnection;
            String requestBody;
            Uri.Builder builder = new Uri.Builder();
            Map<String, String> stringMap = new HashMap<>();
            stringMap.put("grant_type", "password");
            stringMap.put("username", "bnk");
            stringMap.put("password", "bnk");

            Iterator entries = stringMap.entrySet().iterator();
            while (entries.hasNext()) {
                Map.Entry entry = (Map.Entry) entries.next();
                builder.appendQueryParameter(entry.getKey().toString(), entry.getValue().toString());
                entries.remove();
            }
            requestBody = builder.build().getEncodedQuery();

            try {
                URL url = new URL(address);
                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setDoInput(true);
                urlConnection.setDoOutput(true);
                urlConnection.setRequestMethod("POST");
                urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                OutputStream outputStream = new BufferedOutputStream(urlConnection.getOutputStream());
                BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "utf-8"));
                writer.write(requestBody);
                writer.flush();
                writer.close();
                outputStream.close();
                urlConnection.connect();
                if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                    // do something...
                } else {
                    // do something...
                }
                // do something...
            } catch (Exception e) {
                e.printStackTrace();
            }

<强>更新

如果您更喜欢OkHttp，请参阅以下工作代码：

    private class AccessTokenRequest extends AsyncTask<Void, Void, String> {

        @Override
        protected String doInBackground(Void... voids) {
            String accessToken = null;
            OkHttpJsonRequest jsonRequest = new OkHttpJsonRequest();
            RequestBody requestBody = new FormEncodingBuilder()
                    .add("grant_type", "password")
                    .add("username", "bnk")
                    .add("password", "bnk123")
                    .build();
            try {
                JSONObject jsonObject = jsonRequest.post("http://192.168.1.100:24780/token", requestBody);
                if (!jsonObject.isNull("access_token")) {
                    accessToken = jsonObject.getString("access_token");                        
                }
            } catch (IOException | JSONException e) {
                e.printStackTrace();
            }
            return accessToken;
        }

        @Override
        protected void onPostExecute(String response) {
            super.onPostExecute(response);
            // do something such as storing the token for furture requests
        }
    }

    public class OkHttpJsonRequest {
        OkHttpClient client = new OkHttpClient();

        JSONObject post(String url, RequestBody body) throws IOException, JSONException {
            Request request = new Request.Builder()
                    .url(url)
                    .post(body)
                    .build();
            Response response = client.newCall(request).execute();
            return new JSONObject(response.body().string());
        }
    }

希望这有帮助！

Answer 2

您可以使用this library from GitHub。

使用本机登录页面

2 个答案: