java.lang.IllegalArgumentException: URL "https:/my url/api/login/" does not contain "{username}". (parameter #1)

huangapple
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英文:

java.lang.IllegalArgumentException: URL "https:/my url/api/login/" does not contain "{username}". (parameter #1)

问题

以下是你提供的代码的翻译部分：

  1. public class LoginActivity extends AppCompatActivity {
  2.     EditText edtUsername;
  3.     EditText edtPassword;
  4.     Button btnLogin;
  5.     UserService userService;
  7.     @Override
  8.     protected void onCreate(Bundle savedInstanceState) {
  9.         super.onCreate(savedInstanceState);
  10.         setContentView(R.layout.activity_login);
  12.         edtUsername = (EditText) findViewById(R.id.edtUsername);
  13.         edtPassword = (EditText) findViewById(R.id.edtPassword);
  14.         btnLogin = (Button) findViewById(R.id.btnLogin);
  15.         userService = ApiUtils.getUserService();
  17.         btnLogin.setOnClickListener(new View.OnClickListener() {
  18.             @Override
  19.             public void onClick(View v) {
  20.                 String username = edtUsername.getText().toString();
  21.                
  23. <details>
  24. <summary>英文:</summary>
  26. I am new in android studio, and i am doing login activity using java, retrofit and web api (django restframework). i am getting this error, **java.lang.IllegalArgumentException: URL &quot;https:// my url /api/login/&quot; does not contain &quot;{username}&quot;. (parameter #1)
  27.         for method UserService.login** , why i am getting this error? eventhough my web api is working?
  29. this is my post data
  31. [![enter image description here][1]][1]
  34.   [1]: https://i.stack.imgur.com/lq28Q.png
  36. this is my LoginActivity.java
  38.     public class LoginActivity extends AppCompatActivity {
  39.         EditText edtUsername;
  40.         EditText edtPassword;
  41.         Button btnLogin;
  42.         UserService userService;
  43.     
  44.         @Override
  45.         protected void onCreate(Bundle savedInstanceState) {
  46.             super.onCreate(savedInstanceState);
  47.             setContentView(R.layout.activity_login);
  48.     
  49.             edtUsername = (EditText) findViewById(R.id.edtUsername);
  50.             edtPassword = (EditText) findViewById(R.id.edtPassword);
  51.             btnLogin = (Button) findViewById(R.id.btnLogin);
  52.             userService = ApiUtils.getUserService();
  53.     
  54.             btnLogin.setOnClickListener(new View.OnClickListener() {
  55.                 @Override
  56.                 public void onClick(View v) {
  57.                     String username = edtUsername.getText().toString();
  58.                     String password = edtPassword.getText().toString();
  59.                     //validate form
  60.                     if(validateLogin(username, password)){
  61.                         //do login
  62.                         doLogin(username, password);
  63.                     }
  64.                 }
  65.             });
  66.     
  67.         }
  68.     
  69.         private boolean validateLogin(String username, String password){
  70.             if(username == null || username.trim().length() == 0){
  71.                 Toast.makeText(this, &quot;Username is required&quot;, Toast.LENGTH_SHORT).show();
  72.                 return false;
  73.             }
  74.             if(password == null || password.trim().length() == 0){
  75.                 Toast.makeText(this, &quot;Password is required&quot;, Toast.LENGTH_SHORT).show();
  76.                 return false;
  77.             }
  78.             return true;
  79.         }
  80.     
  81.         private void doLogin(final String username,final String password){
  82.             Call call = userService.login(username,password);
  83.             call.enqueue(new Callback() {
  84.                 @Override
  85.                 public void onResponse(Call call, Response response) {
  86.                     if(response.isSuccessful()){
  87.                         ResObj resObj = (ResObj) response.body();
  88.                         if(resObj.getMessage().equals(&quot;true&quot;)){
  89.                             //login start main activity
  90.                             Intent intent = new Intent(LoginActivity.this, DestinationListActivity.class);
  91.                             intent.putExtra(&quot;username&quot;, username);
  92.                             startActivity(intent);
  93.     
  94.                         } else {
  95.                             Toast.makeText(LoginActivity.this, &quot;The username or password is incorrect&quot;, Toast.LENGTH_SHORT).show();
  96.                         }
  97.                     } else {
  98.                         Toast.makeText(LoginActivity.this, &quot;Error! Please try again!&quot;, Toast.LENGTH_SHORT).show();
  99.                     }
  100.                 }
  101.     
  102.                 @Override
  103.                 public void onFailure(Call call, Throwable t) {
  104.                     Toast.makeText(LoginActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
  105.                 }
  106.             });
  107.         }
  108.     }
  110. my UserService
  112.     public interface UserService {
  113.         @POST(&quot;https:// my url /api/login/&quot;)
  114.         Call login(@Path(&quot;username&quot;) String username, @Path(&quot;password&quot;) String password);
  115.     
  116.     }
  118. this is my RetrofitClient
  120.     public class RetrofitClient {
  121.         private static Retrofit retrofit = null;
  122.     
  123.         public static Retrofit getClient(String url){
  124.             if(retrofit == null){
  125.                 retrofit = new Retrofit.Builder()
  126.                         .baseUrl(url)
  127.                         .addConverterFactory(GsonConverterFactory.create())
  128.                         .build();
  129.             }
  130.             return retrofit;
  131.         }
  132.     }
  134. my ResObj
  136.     public class ResObj {
  137.         private String message;
  138.     
  139.         public String getMessage() {
  140.             return message;
  141.         }
  142.     
  143.         public void setMessage(String message) {
  144.             this.message = message;
  145.         }
  146.     }
  148. my ApiUtils
  150.     public class ApiUtils {
  151.     
  152.         public static final String BASE_URL = &quot;https:// my url /&quot;;
  153.     
  154.         public static UserService getUserService(){
  155.             return RetrofitClient.getClient(BASE_URL).create(UserService.class);
  156.         }
  157.     }
  159. this is my full error I receive
  161.     E/AndroidRuntime: FATAL EXCEPTION: main
  162.         Process: com.smartherd.globofly, PID: 27242
  163.         java.lang.IllegalArgumentException: URL &quot;https:// my url /api/login/&quot; does not contain &quot;{username}&quot;. (parameter #1)
  164.             for method UserService.login
  165.             at retrofit2.Utils.methodError(Utils.java:52)
  166.             at retrofit2.Utils.methodError(Utils.java:42)
  167.             at retrofit2.Utils.parameterError(Utils.java:61)
  168.             at retrofit2.RequestFactory$Builder.validatePathName(RequestFactory.java:732)
  169.             at retrofit2.RequestFactory$Builder.parseParameterAnnotation(RequestFactory.java:375)
  170.             at retrofit2.RequestFactory$Builder.parseParameter(RequestFactory.java:295)
  171.             at retrofit2.RequestFactory$Builder.build(RequestFactory.java:182)
  172.             at retrofit2.RequestFactory.parseAnnotations(RequestFactory.java:65)
  173.             at retrofit2.ServiceMethod.parseAnnotations(ServiceMethod.java:25)
  174.             at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:168)
  175.             at retrofit2.Retrofit$1.invoke(Retrofit.java:147)
  176.             at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
  177.             at $Proxy3.login(Unknown Source)
  178.             at com.smartherd.globofly.activities.LoginActivity.doLogin(LoginActivity.java:64)
  179.             at com.smartherd.globofly.activities.LoginActivity.access$100(LoginActivity.java:20)
  180.             at com.smartherd.globofly.activities.LoginActivity$1.onClick(LoginActivity.java:44)
  181.             at android.view.View.performClick(View.java:7125)
  182.             at android.view.View.performClickInternal(View.java:7102)
  183.             at android.view.View.access$3500(View.java:801)
  184.             at android.view.View$PerformClick.run(View.java:27336)
  185.             at android.os.Handler.handleCallback(Handler.java:883)
  186.             at android.os.Handler.dispatchMessage(Handler.java:100)
  187.             at android.os.Looper.loop(Looper.java:214)
  188.             at android.app.ActivityThread.main(ActivityThread.java:7356)
  189.             at java.lang.reflect.Method.invoke(Native Method)
  190.             at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
  191.             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
  192.     I/Process: Sending signal. PID: 27242 SIG: 9
  196. </details>
  199. # 答案1
  200. **得分**: 1
  202. ### 更新
  203. 对于 `@POST` 类型的请求，你还可以使用 `@Field` 来传递表单编码请求的单个字段。
  205. ```java
  206. @FormUrlEncoded
  207. @POST("https://www.url.com/api/login/")
  208. Call login(@Field("username") String username, @Field("password") String password);

具有示例的 @Field 文档。

处理响应：

定义一个简单的类 AuthenticationResponse：

  1. public class AuthenticationResponse {
  2.     public String token;
  3. }

然后将其用作你的 login 调用的泛型类型参数：

  1. @FormUrlEncoded
  2. @POST("https://www.url.com/api/login/")
  3. Call<AuthenticationResponse> login(@Field("username") String username, @Field("password") String password);

使用 AuthenticationResponse 将需要更新你的 LoginActivity 方法 doLogin：

  1. private void doLogin(final String username, final String password) {
  2.     Call<AuthenticationResponse> call = userService.login(username, password);
  3.     call.enqueue(new Callback<AuthenticationResponse>() {
  4.         @Override
  5.         public void onResponse(Call<AuthenticationResponse> call, Response<AuthenticationResponse> response) {
  6.             if (response.isSuccessful()) {
  7.                 AuthenticationResponse authResponse = response.body();
  8.                 if (!TextUtils.isEmpty(authResponse.token)) {
  9.                     // 登录开始主活动
  10.                     Intent intent = new Intent(LoginActivity.this, DestinationListActivity.class);
  11.                     intent.putExtra("username", username);
  12.                     startActivity(intent);
  14.                 } else {
  15.                     Toast.makeText(LoginActivity.this, "用户名或密码不正确", Toast.LENGTH_SHORT).show();
  16.                 }
  17.             } else {
  18.                 Toast.makeText(LoginActivity.this, "错误！请重试！", Toast.LENGTH_SHORT).show();
  19.             }
  20.         }
  22.         @Override
  23.         public void onFailure(Call<AuthenticationResponse> call, Throwable t) {
  24.             Toast.makeText(LoginActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
  25.         }
  26.     });
  27. }

对于需要将参数作为请求的 主体 的 @POST 类型的请求，你必须使用 @Body 注解对这些参数进行标注。但是你只能使用一个 @Body 注解，因为使用该注解声明的参数将定义整个请求的主体。

  1. @POST("https://www.url.com/api/login/")
  2. Call login(@Body Credentials credentials);

其中 Credentials 是一个POJO类：

  1. class Credentials {
  2.     public String username;
  3.     public String password;
  4. }

具有示例的 @Body 文档。

为什么会出现错误？

当你使用 @Path("name") 注解时，你必须为URL中的该路径参数提供占位符。

不要这样写：

  1. @POST("https://www.url.com/api/login/")
  2. Call login(@Path("username") String username, @Path("password") String password);

你的 POST 调用声明应该像这样，这样 Retrofit 就知道在哪里放置这些路径参数：

  1. @POST("https://www.url.com/api/login/{username}/{password}")
  2. Call login(@Path("username") String username, @Path("password") String password);

具有示例的 @Path 文档。

英文:

Update

For @POST type of requests, you can also use @Field to pass individual fields of form-encoded request.

  1. @FormUrlEncoded
  2. @POST(&quot;https://www.url.com/api/login/&quot;)
  3. Call login(@Field(&quot;username&quot;) String username, @Field(&quot;password&quot;) String password);

Documentation of @Field with examples.

To process the response:

Define a simple class AuthenticationResponse:

  1. public class AuthenticationResponse {
  2. public String token;
  3. }

And use it as a generic type parameter of your login call:

  1. @FormUrlEncoded
  2. @POST(&quot;https://www.url.com/api/login/&quot;)
  3. Call&lt;AuthenticationResponse&gt; login(@Field(&quot;username&quot;) String username, @Field(&quot;password&quot;) String password);

Using AuthenticationResponse will require an update of your LoginActivity method doLogin:

  1. private void doLogin(final String username, final String password) {
  2. Call&lt;AuthenticationResponse&gt; call = userService.login(username, password);
  3. call.enqueue(new Callback() {
  4. @Override
  5. public void onResponse(Call call, Response response) {
  6. if (response.isSuccessful()) {
  7. AuthenticationResponse authResponse = (AuthenticationResponse) response.body();
  8. if (!TextUtils.isEmpty(authResponse.token)) {
  9. //login start main activity
  10. Intent intent = new Intent(LoginActivity.this, DestinationListActivity.class);
  11. intent.putExtra(&quot;username&quot;, username);
  12. startActivity(intent);
  13. } else {
  14. Toast.makeText(LoginActivity.this, &quot;The username or password is incorrect&quot;, Toast.LENGTH_SHORT).show();
  15. }
  16. } else {
  17. Toast.makeText(LoginActivity.this, &quot;Error! Please try again!&quot;, Toast.LENGTH_SHORT).show();
  18. }
  19. }
  20. @Override
  21. public void onFailure(Call call, Throwable t) {
  22. Toast.makeText(LoginActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
  23. }
  24. });
  25. }

For @POST type of requests if you need your parameters to be part of the request body then you must annotate those parameters with @Body annotation. But you can you only one @Body annotation as the parameter declared with that annotation will define the whole body of a request.

  1. @POST(&quot;https://www.url.com/api/login/&quot;)
  2. Call login(@Body Credentials credentials);

Where Credentials is a POJO class:

  1. class Credentials {
  2. public String username;
  3. public String password;
  4. }

Documentation of @Body.

Why exactly error happens?

When you use @Path(&quot;name&quot;) annotation you must provide a placeholder for that path argument in your URL.

Instead of:

  1. @POST(&quot;https://www.url.com/api/login/&quot;)
  2. Call login(@Path(&quot;username&quot;) String username, @Path(&quot;password&quot;) String password);

Your POST call declaration should look like this, so the Retrofit will know where to place these path arguments:

  1. @POST(&quot;https://www.url.com/api/login/{username}/{password}&quot;)
  2. Call login(@Path(&quot;username&quot;) String username, @Path(&quot;password&quot;) String password);

Documentation of @Path with examples.

答案2

得分: 0

你的登录 http 终端点是否期望你将登录数据（用户名、密码）作为 url 编码参数发送到请求体中？
如果是的话，尝试像这样修改你的 UserService 接口：

  1. public class ResObj {
  2. private String token;
  3. public String getToken() {
  4. return token;
  5. }
  6. public void setToken(String token) {
  7. this.token = token;
  8. }
  9. }
  10. public interface UserService {
  11. @FormUrlEncoded
  12. @POST("https:// my url /api/login/")
  13. Call<ResObj> login(@Field("username") String username, @Field("password") String password);
  14. }
英文:

Is your login http endpoint expecting, that you're sending the login data (username, password) as urlencoded parameters in the body?
Then try to modify your UserService interface like this:

  1. public class ResObj {
  2. private String token;
  3. public String getToken() {
  4. return token;
  5. }
  6. public void setToken(String token) {
  7. this.token = token;
  8. }
  9. }
  10. public interface UserService {
  11. @FormUrlEncoded
  12. @POST(&quot;https:// my url /api/login/&quot;)
  13. Call&lt;ResObj&gt; login(@Field(&quot;username&quot;) String username, @Field(&quot;password&quot;) String password);
  14. }

huangapple
  • 本文由 发表于 2020年7月24日 15:09:07
  • 转载请务必保留本文链接：https://go.coder-hub.com/63068557.html
  • android
  • django-rest-framework
  • java
  • retrofit
  • retrofit2
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