我正在尝试从我的 android 应用程序连接到 django 服务器。我正在尝试访问我的 api，使用 volly 发出 POST 请求。一切都准备就绪。需要所有参数和 header ，但我仍然收到此错误。

log: [490] BasicNetwork.performRequest: Unexpected response code 401 for https://example.com/

它不允许我访问我的 Django Api。它适用于 PHP 服务器。

    public void vollyRequest()
    {
        RequestQueue queue  = Volley.newRequestQueue(this);
        StringRequest request =  new StringRequest(Request.Method.POST  , "https://example.com/", new Response.Listener<String>() {

            @Override
            public void onResponse(String response) {
                Toast.makeText(MainActivity.this, "RESPONSE: " + response, Toast.LENGTH_SHORT ).show();
            }

        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(MainActivity.this, "ERROR: " + error, Toast.LENGTH_SHORT ).show();
            }
        }) {

            @Override
            protected Map<String,String> getParams(){
                Map<String,String> params = new HashMap<String, String>();
                params.put("username","***");
                params.put("password","***");
                return params;
                }
//            @Override
//            public Map<String, String> getHeaders() throws AuthFailureError {
//            Map<String,String> params = new HashMap<String, String>();
//            params.put("Content-Type","application/x-www-form-urlencoded");
//            return params;
//            }
        };
        queue.add(request);
    }

最佳答案

我自己解决了... 此代码将为您提供一个身份验证 token ，其中包含您提供的用户名和密码，然后该 token 将被放入 header 中以从服务器获取数据...

public void vollyRequestGetAuthToken()
{
    RequestQueue queue  = Volley.newRequestQueue(this);
    StringRequest request =  new StringRequest(Request.Method.POST  , "https://example.com/get-auth-token/", new Response.Listener<String>() {

        @Override

    public void onResponse(String response) {
        Toast.makeText(MainActivity.this, "RESPONSE: " + response, Toast.LENGTH_SHORT ).show();
        System.out.println("RESPONSE:          >>> " + response + "<<<");
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(MainActivity.this, "ERROR: " + error, Toast.LENGTH_SHORT ).show();
    }
}) {
    @Override
    protected Map<String,String> getParams(){
        Map<String,String> params = new HashMap<String, String>();
        params.put("username","*****");
        params.put("password","*****");
        return params;
    }
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String,String> params = new HashMap<String, String>();
        params.put("Authorization",
                String.format("Basic %s", Base64.encodeToString(
                        String.format("%s:%s", "<username>", "<password>").getBytes(), Base64.DEFAULT)));
        params.put("username" , "*****" );
        params.put("password" , "*****" );
        return params;
    }
};
    queue.add(request);
}

现在当你有了auth-token后，使用下面的代码发送auth-token来获取数据

@Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                HashMap<String, String> headers = new HashMap<String, String>();
                headers.put("Authorization", "Token <token>");
                return headers;
            }

关于android - com.android.volley.AuthFailureError 向 django 服务器发出基本的 volley POST 请求，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31891604/