如何以编程方式允许端点的 GET 方法? [英] How to allow GET method for endpoint programmatically?
问题描述
我正在加载一个 .war
文件并将其作为 Web 应用程序添加到嵌入式 Tomcat 服务器.
I am loading a .war
file and add it as web app to the embedded Tomcat server.
@Bean
public EmbeddedServletContainerFactory servletContainerFactory() {
LOGGER.info("Adding web app");
return new TomcatEmbeddedServletContainerFactory() {
@Override
protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer(Tomcat tomcat) {
String appHome = System.getProperty(Environment.APP_HOME);
String targetFileName = "web-0.0.1-SNAPSHOT.war";
InputStream resourceAsStream = getClass().getClassLoader().getResourceAsStream(targetFileName);
LOGGER.info(System.getProperty("user.name"));
LOGGER.debug("Loading WAR from " + appHome);
File target = new File(Paths.get(appHome, targetFileName).toString());
try {
LOGGER.info(String.format("Copy %s to %s", targetFileName, target.getAbsoluteFile().toPath()));
java.nio.file.Files.copy(resourceAsStream, target.getAbsoluteFile().toPath(), StandardCopyOption.REPLACE_EXISTING);
Context context = tomcat.addWebapp("/", target.getAbsolutePath());
context.setParentClassLoader(getClass().getClassLoader());
} catch (ServletException ex) {
throw new IllegalStateException("Failed to add webapp.", ex);
} catch (Exception e) {
throw new IllegalStateException("Unknown error while trying to load webapp.", e);
}
return super.getTomcatEmbeddedServletContainer(tomcat);
}
};
}
到目前为止,这是有效的,但如果我访问 http://localhost:8080/web 我得到
This is working so far but if I access http://localhost:8080/web I am getting
2017-03-04 11:18:59.588 WARN 29234 --- [nio-8080-exec-2] o.s.web.servlet.PageNotFound : Request method 'GET' not supported
和响应
Allow: POST
Content-Length: 0
Date: Sat, 04 Mar 2017 10:26:16 GMT
我确信我所要做的就是允许 /web
上的 GET
方法,并希望从加载的 war中提供静态 Web 内容code> 文件可通过网络浏览器访问.
I am sure all I have to do is to allow the GET
method on /web
and hopefully the static web content provided from the loaded war
file will be accessible via web browser.
如何/在何处配置端点以允许 GET
请求?
How/where can I configure the endpoint such that it allows GET
requests?
我尝试引入一个 WebController
,如本教程中所述.
I tried to introduce a WebController
as described in this tutorial.
@Controller
public class WebController {
private final static Logger LOGGER = Logger.getLogger(WebController.class);
@RequestMapping(value = "/web", method = RequestMethod.GET)
public String index() {
LOGGER.info("INDEX !");
return "index";
}
}
在日志输出中,我可以看到这是正确映射的:
In the log output I can see that this is getting mapped correctly:
RequestMappingHandlerMapping : Mapped "{[/web],methods=[GET]}" onto public java.lang.String org.ema.server.spring.controller.dl4j.WebController.index()
但这并没有改变我无法访问该网站的事实.
but it does not change the fact that I cannot visit the website.
我还配置了一个InternalResourceViewResolver
:
@Configuration
@EnableWebMvc
public class MvcConfiguration extends WebMvcConfigurerAdapter {
private final static Logger LOGGER = Logger.getLogger(MvcConfiguration.class);
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
LOGGER.info("configureViewResolvers()");
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setSuffix(".html");
registry.viewResolver(resolver);
}
@Override
public void configureDefaultServletHandling(
DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
web.xml
由于我是用纯Java配置的,所以这个文件没有定义很多:
Since I configure everything in pure Java, this file does not define a lot:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Easy Model Access Server</display-name>
<listener>
<listener-class>org.ema.server.ServerEntryPoint</listener-class>
</listener>
<context-param>
<param-name>log4j-config-location</param-name>
<param-value>WEB-INF/classes/log4j.properties</param-value>
</context-param>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/web/*.html</url-pattern>
</servlet-mapping>
</web-app>
<小时>
重现
如果你想重现这个,你可以简单地签出来自github的整个代码.您只需要这样做:
mkdir ~/.ema
git clone https://github.com/silentsnooc/easy-model-access
cd easy-model-access/ema-server
mvn clean install
java -jar server/target/server-*.jar
这将克隆、构建和运行服务器.
This will clone, build and run the server.
目前需要目录~/.ema
目录.这是服务器启动时复制 WAR 的地方.
The directory ~/.ema
directory is required at the moment. It is where the WAR is being copied as the server starts.
推荐答案
我的猜测是您的 web.xml 将任何路径映射到 Spring DispatcherServlet,例如:
My guess is that your web.xml maps any path to the Spring DispatcherServlet, something like:
<servlet>
<servlet-name>app</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>app</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
由于
任何请求都必须由 Spring 控制器处理,因此您的静态文件不会由 Tomcat 提供服务.像 /*.html
这样的模式也会有同样的效果.
Because of <url-pattern>/</url-pattern>
any request must be handled by a Spring controller, for this reason your static files are not served by Tomcat. Also a pattern like /*.html
would have same effect.
如果您只有几页,您可以将一个或多个映射添加到预定义的 默认servlet,之前 Spring 的映射(如果你使用它,也可以在 Spring Security 之前):
If you have only a few pages you might add one or more mapping to the predefined default servlet for them, before the mapping of Spring (and also before Spring Security if you use it):
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>index.html</url-pattern>
</servlet-mapping>
您也可以使用 <url-pattern>*.html</url-pattern>
或者,如果您的资源位于 web
路径下并且只有那里的静态资源:
You may also use <url-pattern>*.html</url-pattern>
or, if your resources are under the web
path and there are only static resources there: <url-pattern>/web/*</url-pattern>
也许所有这些都是在 org.ema.server.ServerEntryPoint
中的 Java 代码中完成的,您在 web.xml 中作为侦听器
Maybe all this is done instead in Java code in the org.ema.server.ServerEntryPoint
that you have as a listener in web.xml
我认为我在 web.xml
中写的映射是在你的情况下在 org.ema.server.spring.config 类的方法
,我将其更改为使用更严格的模式 getServletMappings
中完成的.AppInitializer/rest-api/*
而不是 /
,不确定模式是正确的,其他一切正常,但现在 http://127.0.0.1:8080/index.html
有效
I think the mapping I wrote up in web.xml
is done in your case in method getServletMappings
of class org.ema.server.spring.config.AppInitializer
, I changed it to use a more strict pattern /rest-api/*
instead than /
, not sure pattern is correct and everything else works, but now http://127.0.0.1:8080/index.html
works
@Override
protected String[] getServletMappings() {
return new String[] { "/rest-api/*" };
}
这篇关于如何以编程方式允许端点的 GET 方法?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!