404 使用 Retrofit 发出 POST 请求时

Question

我使用 Retrofit2 创建了以下 API 调用：

@Headers({"Accept: application/json", "Content-Type: application/json"})
@POST("task/create/")
Call<StandardTaskResponse> createNewTask(@Body Task newTask);

我尝试像这样使用该方法：

Task newTask = new Task(name, description, "", null, USER, 4, priority, null, null);

      Call<StandardTaskResponse> call = HavocService.getInstance().getHavocAPI().createNewTask(newTask);
        call.enqueue(new Callback<StandardTaskResponse>() {
            @Override
            public void onResponse(Call<StandardTaskResponse> call, Response<StandardTaskResponse> response) {
                LogUtil.v("Response message: " + response.message());
            }

            @Override
            public void onFailure(Call<StandardTaskResponse> call, Throwable t) {
                LogUtil.e(t.getCause().getMessage());
            }
        });

这是日志显示的内容：

10-16 19:08:07.963 10511-10894/io.havoc.todo D/OkHttp: --> POST http://ec2-amazonaws-base-url-redacted.com:3000/api/task/create/ http/1.1
10-16 19:08:07.964 10511-10894/io.havoc.todo D/OkHttp: Content-Type: application/json
10-16 19:08:07.964 10511-10894/io.havoc.todo D/OkHttp: Content-Length: 124
10-16 19:08:07.964 10511-10894/io.havoc.todo D/OkHttp: Accept: application/json
10-16 19:08:07.964 10511-10894/io.havoc.todo D/OkHttp: {"category":"","description":"H","indexInList":4,"name":"H","priority":"HIGH","user":"57a7bd24-ddf0-5c24-9091-ba331e486dc7"}
10-16 19:08:07.964 10511-10894/io.havoc.todo D/OkHttp: --> END POST (124-byte body)
10-16 19:08:07.969 10511-10516/io.havoc.todo I/art: Do partial code cache collection, code=23KB, data=29KB
10-16 19:08:07.969 10511-10516/io.havoc.todo I/art: After code cache collection, code=23KB, data=29KB
10-16 19:08:07.969 10511-10516/io.havoc.todo I/art: Increasing code cache capacity to 128KB
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: <-- 404 Not Found http://ec2-amazonaws-base-url-redacted.com:3000/api/task/create/ (34ms)
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: content-type: application/json; charset=utf-8
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: cache-control: no-cache
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: vary: accept-encoding
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: Date: Sun, 16 Oct 2016 23:07:59 GMT
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: Connection: keep-alive
10-16 19:08:07.999 10511-10894/io.havoc.todo D/OkHttp: Transfer-Encoding: chunked
10-16 19:08:08.020 10511-10894/io.havoc.todo D/OkHttp: {"statusCode":404,"error":"Not Found"}
10-16 19:08:08.020 10511-10894/io.havoc.todo D/OkHttp: <-- END HTTP (38-byte body)
10-16 19:08:08.050 10511-10511/io.havoc.todo V/(NewTaskActivityPresenter.java:40): Response message: Not Found

我搜索了其他 StackOverflow 答案，常见的嫌疑人是基本 URL。我的访问方式如下：

private static final String HAVOC_URI = "http://ec2-amazonaws-base-url-redacted.com:3000/api/";.

这个 API 调用的主体应该是我想要创建的 Task。响应应该是以下形式：

{
    "status":true,
    "doc":{
        "_id":"5801175bc5c3f451301fd235",
        "t_id":"8671fc295bc9",
        "name":"Do calculus homework",
        "description":"Finish all assigned homework from chapters 1 and 2",
        "category":"test",
        "indexInList":0,
        "priority":3,
        "dateDue":1477291500000,
        "user":"57a",
        "status":"ARCHIVED",
        "__v":0,
        "subtasks":[
            {
                "name":"Finish Chapter 1 - Derivatives",
                "isCompleted":false
            },
            {
                "name":"Finish Chapter 1 - Integrals",
                "isCompleted":false
            },
            {
                "name":"Finish Chapter 2 - Graphing",
                "isCompleted":false
            }
        ]
    }
}

即：status：后端是否有错误，doc:刚刚创建的任务

我不知道为什么会这样。我确定基本 URL 是正确的。我实际上可以使用REST API test app from the Play Store 并使用空主体执行 POST 请求，并且响应是正确的。只有当我在 Android 上尝试此操作时才会收到此错误。

我将不胜感激。

Answer 1

原来我是个白痴。我需要删除 @POST 参数的结尾反斜杠。

@Headers({"Accept: application/json", "Content-Type: application/json"})
@POST("task/create")
Call<StandardTaskResponse> createNewTask(@Body Task newTask);