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[英]Implement OAuth2 with resource owner password credentials on Android
[英]Android OAuth2 Resource Owner Password Credentials Grant
该应用程序需要连接到仅支持OAuth2资源所有者密码凭据授予的API。 我尝试使用下面的代码,但得到响应代码400“错误的请求”。 使用相同的代码,我可以连接到普通站点并检索内容。
我知道API代码可以正常工作,因为使用Postman可以正常工作。 在Postman中,我只是发出一个发布请求,提供用户名,密码和grant_type,并使用x-www-form-urlencoded
连接的返回是一个json。
任何想法有什么问题吗? 我应该使用第三方图书馆吗? 有什么建议吗? 谢谢。
在代码中,我更改了凭据和API链接
public class GetData extends AsyncTask<String, String, String> {
@Override
public String doInBackground(String... args) {
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL("http://someaddress.azurewebsites.net/api/token");
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("username", "some@email.com");
urlConnection.setRequestProperty("password", "123");
urlConnection.setRequestProperty("grant_type", "password");
urlConnection.connect();
int responseCode = urlConnection.getResponseCode();
String responseMsg = urlConnection.getResponseMessage();
if (responseCode >= 400 && responseCode <= 499) {
throw new Exception(responseMsg + " :: " + responseCode);
}
InputStream in = urlConnection.getInputStream();
InputStreamReader isw = new InputStreamReader(in);
int data = isw.read();
while (data != -1) {
char current = (char) data;
data = isw.read();
System.out.print(current);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
//Do something with the JSON string
}
}
根据Amod的建议添加一些日志。 这是上面代码中的printStackTrace的返回。
12-12 01:16:33.210 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: java.lang.Exception: Bad Request :: 400
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at com.marcussabino.tsftestedeconexo.GetData$override.doInBackground(GetData.java:40)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at com.marcussabino.tsftestedeconexo.GetData$override.access$dispatch(GetData.java)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at com.marcussabino.tsftestedeconexo.GetData.doInBackground(GetData.java:0)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at com.marcussabino.tsftestedeconexo.GetData.doInBackground(GetData.java:15)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:295)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
12-12 01:16:33.211 8558-8643/com.marcussabino.tsftestedeconexo W/System.err: at java.lang.Thread.run(Thread.java:818)
我在理解setRequestPorperty错误!
谢谢Nell和Stunner: https : //stackoverflow.com/a/40576153/4276115
这是对我有用的代码:
public class GetData extends AsyncTask<String, String, String> {
@Override
public String doInBackground(String... args) {
String urlParameters = "username=" + args[0] +
"&password=" + args[1] +
"&grant_type=" + args[2];
byte[] postData = urlParameters.getBytes( StandardCharsets.UTF_8 );
int postDataLength = postData.length;
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL("http://somesite.azurewebsites.net/api/token");
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
urlConnection.setRequestProperty("charset", "utf-8");
urlConnection.setRequestProperty("Content-Length", Integer.toString(postDataLength));
urlConnection.setUseCaches(false);
try(DataOutputStream wr = new DataOutputStream(urlConnection.getOutputStream())) {
wr.write( postData );
}
int responseCode = urlConnection.getResponseCode();
String responseMsg = urlConnection.getResponseMessage();
if (responseCode >= 400 && responseCode <= 499) {
throw new Exception(responseMsg + " :: " + responseCode);
}
InputStream in = urlConnection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line+"\n");
Log.v("JSON", "> " + line); //here you get the response
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
//Do something with the JSON string
}
}
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