GWT：Servlet URL映射给出了一个404错误 [英] GWT: Servlet URL mapping gives a 404 error

问题描述

我已经阅读了其他GWT Servlet问题，但我仍然无法解决我的问题。我的软件包叫做Maps，它有一个名为MyService的服务（根据GWT教程设置）。 web.xml文件包含以下内容：

I have read the other GWT Servlet questions, but I'm having trouble solving my problem still. My package is called Maps, and it has a service named MyService (which was set up according to a GWT Tutorial). The web.xml file includes the following:

<servlet>
    <servlet-name>MyServiceImpl</servlet-name>
    <servlet-class>com.xerox.maps.maps.server.MyServiceImpl</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>MyServiceImpl</servlet-name>
    <url-pattern>/Maps/service</url-pattern>
</servlet-mapping>

在MyService中，我有一行：

In MyService, I have the line:

@RemoteServiceRelativePath("service")
public interface MyService extends RemoteService { ...

但是，当我尝试进行RPC调用时，会出现错误。错误的详细信息说它是一个404 HTTP错误。我怎样才能解决这个问题，以确保映射是正确的？

However, when I try to make an RPC call, there is an error thrown. The details of the error say that it is a 404 HTTP error. How can I fix this, to make sure that the mapping is correct?

编辑7.27

MyService.java包含注释：

MyService.java contains the annotation:

@RemoteServiceRelativePath("service")

而web.xml包含：

And web.xml contains:

<servlet-name>MyServiceImpl</servlet-name>
<url-pattern>/com.x.maps.Maps/service</url-pattern>

如果我使用FireBug跟踪XHR，它会告诉我有一个对com.x的调用。 maps.Maps

If I follow the XHR with FireBug, it shows me that there is a call to com.x.maps.Maps

推荐答案

404当GWT错误地推断服务端点路径时，通常不会引发此错误。尝试删除 @RemoteServiceRelativePath（service）并重新编译并检查，如果这样做不起作用，则手动查找服务的URL端点（通过从浏览器中敲击可能的路径错误更改为500内部错误），然后将正确的路径作为参数提供给 @RemoteServiceRelativePath（correct / path）。我会立即尝试的几个试验是 @RemoteServiceRelativePath（/ Maps / service）和 @RemoteServiceRelativePath（Maps / service）没有斜杠

404 Not found is thrown usually when service endpoint path is inferred wrongly by GWT. Try removing @RemoteServiceRelativePath("service") and recompile and check, If that does not work find out the URL endpoint of the service manually (by hitting likely paths from a browser till the error changes to 500 internal error) and then give the correct path as argument to @RemoteServiceRelativePath("correct/path"). Few trials I would try right away is @RemoteServiceRelativePath("/Maps/service") and @RemoteServiceRelativePath("Maps/service") without the slash

这篇关于GWT：Servlet URL映射给出了一个404错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！