On Mon, Mar 7, 2016 at 5:36 PM, Mark Eggers <its_toas...@yahoo.com.invalid>
wrote:
> Sean,
>
> See comment at the end.
>
> On 3/7/2016 2:11 PM, Sean Dawson wrote:
> > On Sun, Mar 6, 2016 at 12:48 PM, Sean Dawson <seandawson2...@gmail.com>
> > wrote:
> >
> >>
> >> Tomcat 8_32
> >> Windows 7
> >> Java 8_51
> >> RestEasy 3.0.11.Final
> >> GWT 2.7.0 (Jetty jetty-9.3.5.v20151012)
> >>
> >> Servlet code makes a RestEasy call to another servlet (same container) -
> >> second servlet sets the 'Warning' HTTP header on response. Would like
> to
> >> access that in first servlet but when running in Tomcat, that header is
> not
> >> included.
> >>
> >> Code to get header in first servlet:
> >>
> >> Object headers = ((ClientResponseFailure)
> >> e).getResponse().getResponseHeaders().get("Warning");
> >>
> >> Also tried: getHeaders(), getStringHeaders(), and getHeaderString().
> >>
> >> When running GWT in superdev mode in IntelliJ (15.0.4) using Jetty, the
> >> above returns a List with one item that contains the warning string.
> When
> >> remote debugging Tomcat, that call returns null.
> >>
> >> Added this to web app xml, and also tried Tomcat conf/web.xml...
> >>
> >> <filter>
> >> <filter-name>CorsFilter</filter-name>
> >>
> <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
> >> <init-param>
> >> <param-name>cors.exposed.headers</param-name>
> >> <param-value>Warning</param-value>
> >> </init-param>
> >> </filter>
> >> <filter-mapping>
> >> <filter-name>CorsFilter</filter-name>
> >> <url-pattern>/*</url-pattern>
> >> </filter-mapping>
> >>
> >> Also tried cors.allowed.headers.
> >>
> >> Any pointers?
> >>
> >>
> >
> > Alright, lets try this again. Simple reproducible testcase...
> >
> > - download latest Tomcat 8 for Windows 64-bit zip
> >
> http://mirrors.ocf.berkeley.edu/apache/tomcat/tomcat-8/v8.0.32/bin/apache-tomcat-8.0.32-windows-x64.zip
> > - extract somewhere
> > - delete everything in webapps folder
> > - build project below, put in webapps folder
> > - go to: http://localhost:8080/one
> > - check response headers... no Warning header
> >
> > ** pom.xml **
> >
> > <project xmlns="http://maven.apache.org/POM/4.0.0";
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> > xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> > http://maven.apache.org/maven-v4_0_0.xsd";>
> > <modelVersion>4.0.0</modelVersion>
> >
> > <groupId>test</groupId>
> > <artifactId>tcTest</artifactId>
> > <packaging>war</packaging>
> > <version>1.0-SNAPSHOT</version>
> >
> > <name>tcTest Maven Webapp</name>
> > <url>http://maven.apache.org</url>
> >
> > <dependencies>
> > <dependency>
> > <groupId>org.glassfish</groupId>
> > <artifactId>javax.servlet</artifactId>
> > <version>3.1.1</version>
> > </dependency>
> > <dependency>
> > <groupId>org.jboss.resteasy</groupId>
> > <artifactId>resteasy-client</artifactId>
> > <version>3.0.11.Final</version>
> > </dependency>
> > </dependencies>
> >
> > <build>
> > <finalName>ROOT</finalName>
> > </build>
> > </project>
> >
> >
> > ** web.xml **
> >
> >
> > <!DOCTYPE web-app PUBLIC
> > "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> > "http://java.sun.com/dtd/web-app_2_3.dtd"; >
> >
> > <web-app>
> > <display-name>Archetype Created Web Application</display-name>
> >
> > <servlet>
> > <servlet-name>One</servlet-name>
> > <servlet-class>pkg.ServletOne</servlet-class>
> > </servlet>
> >
> > <servlet-mapping>
> > <servlet-name>One</servlet-name>
> > <url-pattern>/one/*</url-pattern>
> > </servlet-mapping>
> >
> > <servlet>
> > <servlet-name>Two</servlet-name>
> > <servlet-class>pkg.ServletTwo</servlet-class>
> > </servlet>
> >
> > <servlet-mapping>
> > <servlet-name>Two</servlet-name>
> > <url-pattern>/two/*</url-pattern>
> > </servlet-mapping>
> > </web-app>
> >
> >
> > ** index.html **
> >
> >
> > <html>
> > <body>
> > <h2>Hello World!</h2>
> > </body>
> > </html>
> >
> >
> > ** Caller interface **
> >
> >
> > package pkg;
> >
> > import javax.ws.rs.GET;
> > import javax.ws.rs.Path;
> >
> > public interface Caller
> > {
> > @GET
> > @Path("two")
> > String makeCall();
> > }
> >
> >
> >
> > ** Servlet one **
> >
> >
> > package pkg;
> >
> > import java.io.IOException;
> >
> > import javax.servlet.ServletException;
> > import javax.servlet.http.HttpServlet;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
> > import javax.ws.rs.core.MediaType;
> >
> > import org.jboss.resteasy.client.ProxyBuilder;
> >
> > public class ServletOne extends HttpServlet
> > {
> > Caller caller;
> >
> > @Override
> > public void init() throws ServletException
> > {
> > caller = ProxyBuilder.build(Caller.class,
> > "http://localhost:8080";).now();
> > }
> >
> > @Override
> > protected void doGet(HttpServletRequest request,
> > HttpServletResponse response) throws ServletException, IOException
> > {
> > String result = caller.makeCall();
> > response.getWriter().println(result);
> > }
> > }
> >
> >
> > ** Servlet two **
> >
> >
> > package pkg;
> >
> > import java.io.IOException;
> >
> > import javax.servlet.ServletException;
> > import javax.servlet.http.HttpServlet;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
> >
> > public class ServletTwo extends HttpServlet
> > {
> > @Override
> > protected void doGet(HttpServletRequest request,
> > HttpServletResponse response) throws ServletException, IOException
> > {
> > addHeader(response);
> > response.getWriter().println("Ok");
> > }
> >
> > void addHeader(HttpServletResponse response)
> > {
> > response.setHeader("Warning", "This is a warning"); // also
> > tried addHeader()
> > }
> > }
> >
>
> <dependency>
> <groupId>org.glassfish</groupId>
> <artifactId>javax.servlet</artifactId>
> <version>3.1.1</version>
> </dependency>
>
> This is wrong and will include the servlet API in your WAR file.
>
>
Thanks for your reply Mark. Minor oversight. I added provided to the
servlet dependency and tried it again - same result (ie. no Warning
response header). These are all I see:
1. HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Length: 6 Date:
Mon, 07 Mar 2016 22:43:00 GMT
I didn't use cors in this example, but it's the same result as the larger
app with cors in the web.xml for both tomcat and the webapp.
You at least need:
>
> <dependency>
> <groupId>org.glassfish</groupId>
> <artifactId>javax.servlet</artifactId>
> <version>3.1.1</version>
> <scope>provided</scope>
> </dependency>
>
> I actually use the following in my Jersey applications:
> <properties>
> <version.jersey>2.22.1</version.jersey>
> <version.jdk>1.7</version.jdk>
> <version.servlet.api>3.1.0</version.servlet.api>
> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
> </properties>
>
> <!-- chunk of dependencies -->
> <dependency>
> <groupId>javax.servlet</groupId>
> <artifactId>javax.servlet-api</artifactId>
> <version>${version.servlet.api}</version>
> <scope>provided</scope>
> </dependency>
> <dependency>
> <groupId>javax.servlet.jsp</groupId>
> <artifactId>javax.servlet.jsp-api</artifactId>
> <version>2.3.0</version>
> <scope>provided</scope>
> </dependency>
> <!-- JSTL because scriptlets are evil -->
> <dependency>
> <groupId>javax.servlet.jsp.jstl</groupId>
> <artifactId>javax.servlet.jsp.jstl-api</artifactId>
> <version>1.2.1</version>
> <!-- the above brings in servlet spec 2.5 so it MUST be excluded -->
> <exclusions>
> <exclusion>
> <groupId>javax.servlet</groupId>
> <artifactId>servlet-api</artifactId>
> </exclusion>
> <exclusion>
> <groupId>javax.servlet.jsp</groupId>
> <artifactId>jsp-api</artifactId>
> </exclusion>
> </exclusions>
> </dependency>
> <!-- standard tag libraries - apache version -->
> <dependency>
> <groupId>org.apache.taglibs</groupId>
> <artifactId>taglibs-standard-impl</artifactId>
> <version>1.2.5</version>
> </dependency>
> <!-- other dependencies go here - including Jersey -->
>
> I don't know if this will help solve your problem, but getting the
> servlet api out of your WAR file is a good start.
>
> . . . just my two cents
> /mde/
>
>
