“HTTP错误：500无领域”运行GWT的“MobileWebApp”样品 [英] "HTTP ERROR: 500 No realm" running GWT's "MobileWebApp" sample

问题描述

我试图运行GWT 2.4示例应用程序MobileWebApp。当我尝试通过Eclipse以开发模式运行应用程序时，出现500No Realm错误。

我知道这是一个身份验证问题。 b
$ b

我不熟悉Google App Engine或Jetty，但是从web.xml中可以看到有一个servlet过滤器，它使用appengine UserService来推测将用户重定向到Google用于身份验证。

我正在使用：

• Eclipse 3.7 SR1）


• 适用于Eclipse 2.4的Google插件


• m2eclipse

我在下面的web.xml中添加了一段摘录。我不确定其他信息会对诊断这个问题有帮助。

 < security-constraint> 
< display-name> 
在显示
主机html页面之前，必要时重定向到登录页面。 
< / display-name> 
< web-resource-collection> 
< web-resource-name>需要登录< / web-resource-name> 
< url-pattern> /MobileWebApp.html< / url-pattern> 
< / web-resource-collection> 
< auth-constraint> 
<角色名称> *< /角色名称> 
< / auth-constraint> 
< / security-constraint> 
 
< filter> 
< filter-name> GaeAuthFilter< / filter-name> 
 <！ -  
此过滤器演示如何使GAE认证
服务对于RequestFactory客户端可见。 
  - > 
< filter-class> com.google.gwt.sample.gaerequest.server.GaeAuthFilter< / filter-class> 
< / filter> 
< filter-mapping> 
< filter-name> GaeAuthFilter< / filter-name> 
< url-pattern> / gwtRequest / *< / url-pattern> 
< / filter-mapping> 
  

以下是Eclipse控制台中的输出：

  [WARN]请求/MobileWebApp.html失败 - 无域
 [错误] 500  -  GET /MobileWebApp.html?gwt.codesvr=127.0.0.1:9997（127.0 .0.1）1401字节
请求标题
主机：127.0.0.1:8888 
用户代理：Mozilla / 5.0（Windows NT 6.1; rv：7.0.1）Gecko / 20100101 Firefox / 7.0 .1 
 Accept：text / html，application / xhtml + xml，application / xml; q = 0.9，* / *; q = 0.8 
 Accept-Language：en-us，en; q = 0.5 
 Accept-Encoding：gzip，deflate 
 Accept-Charset：ISO-8859-1，utf-8; q = 0.7，*; q = 0.7 
连接：keep-alive 
响应标头
 Content-Type：text / html; charset = iso-8859-1 
 Content-Length：1401 
  

非常感谢任何帮助建议！

11/11/11编辑：我添加了Jetty标签，因为它似乎与此问题有关。

如果您的第一个请求失败，只需获取/MobileWebApp.html页面，那么它可能不是身份验证问题。你是否为该项目启用了GAE（不仅是GWT）？这可能是一个问题。

我在某处读到，在Eclipse中调试应用程序有两种方式，一种是以/ webapp身份运行，另一种是另一种（我不使用蚀）。其中一个工作，另一个不工作。

如果不行，您可以尝试更换内置的码头：

• 添加GWT参数：-server com.google.appengine.tools.development.gwt.AppEngineLauncher


• VM参数：-javaagent：/path_to/appengine-agent.jar

最后一个选项与-noserver一起使用，但不能调试服务器端代码，只是客户端GWT的东西：首先用mvn jetty启动jetty：运行，然后在Eclipse中用-noserver GWT param进行调试。

I'm trying to run the GWT 2.4 sample app "MobileWebApp". I get a 500 "No Realm" error when I try to run the app in dev mode through Eclipse.

I understand this is an authentication problem.

I'm not familiar with Google App Engine or Jetty but from looking at the web.xml I can see there is a servlet filter where it is using the appengine UserService to presumably redirect the user to Google for authentication.

I'm using:

• Eclipse 3.7 (Indigo SR1)
• Google Plugin for Eclipse 2.4
• m2eclipse

I'm including an excerpt from the web.xml below. I'm not sure what other info would be helpful in diagnosing this problem.

  <security-constraint>
    <display-name>
      Redirect to the login page if needed before showing
      the host html page.
    </display-name>
    <web-resource-collection>
      <web-resource-name>Login required</web-resource-name>
      <url-pattern>/MobileWebApp.html</url-pattern>
    </web-resource-collection>
    <auth-constraint>
      <role-name>*</role-name>
    </auth-constraint>
  </security-constraint>

  <filter>
    <filter-name>GaeAuthFilter</filter-name>
    <!--
      This filter demonstrates making GAE authentication
      services visible to a RequestFactory client.
    -->
    <filter-class>com.google.gwt.sample.gaerequest.server.GaeAuthFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>GaeAuthFilter</filter-name>
    <url-pattern>/gwtRequest/*</url-pattern>
  </filter-mapping>

Below is the output in the Eclipse console:

[WARN] Request /MobileWebApp.html failed - no realm
[ERROR] 500 - GET /MobileWebApp.html?gwt.codesvr=127.0.0.1:9997 (127.0.0.1) 1401 bytes
   Request headers
      Host: 127.0.0.1:8888
      User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
      Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
      Accept-Language: en-us,en;q=0.5
      Accept-Encoding: gzip, deflate
      Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
      Connection: keep-alive
   Response headers
      Content-Type: text/html; charset=iso-8859-1
      Content-Length: 1401

Many thanks for any helpful advice!

Edit on 11/11/11: I added Jetty tag since it seems relevant to this problem.

解决方案

If your very first request fails, just getting the /MobileWebApp.html page, then it probably isn't an authentication problem. Do you have GAE enabled for that project (not only GWT)? That might be one issue.

I read somewhere that there's two ways of debugging an app in Eclipse, one is with run as/webapp, and forgot which was the other one (I don't use Eclipse). One of them works and another doesn't.

If that doesn't work, you can try replacing the built-in jetty:

• add a GWT param: -server com.google.appengine.tools.development.gwt.AppEngineLauncher
• VM param: -javaagent:/path_to/appengine-agent.jar

And the last option is with -noserver, but then you wont be able to debug the server-side code, just the client-side GWT stuff: first start jetty with mvn jetty:run and then debug in Eclipse with -noserver GWT param.

这篇关于“HTTP错误：500无领域”运行GWT的“MobileWebApp”样品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！