Glad that you got it working. Sorry that you had to struggle through that. I am surprised that Eclipse's XML editor did not place warning markers about having multiple definitions of the <servlet-name> tag - it should have done that provided you had a valid reference to your XSD/DTD within the web.xml file.
On Sat, Apr 17, 2010 at 8:07 AM, bosun <[email protected]> wrote: > Thank you for explanation, Chau. Checking .xsd file is really a good > practice when having a question about xml schema. > > > > On Sat, Apr 17, 2010 at 2:47 AM, Chau Huynh <[email protected]> wrote: > >> On Sat, Apr 17, 2010 at 8:43 AM, bosun <[email protected]> wrote: >> Is there a order requirement in <servlet/> element? Or should only one >> servlet defined in this section? Anyone know how does invocation make on >> servlets in section of <servlet/> and <servlet-mapping/> in web.xml ? Does >> invocation go through chains of servlet? >> >> It's because of incorrect <servlet> and <servlet-mapping> declaration in >> your old web.xml. >> Should use each <servlet> to define 1 servlet only (no limit on numer of >> servlet) >> The link in web.xml file reference to those syntax >> http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd >> or you can just google "web.xml" for easier explanation. >> >> >> On Sat, Apr 17, 2010 at 8:43 AM, bosun <[email protected]> wrote: >> >>> From my observation, <form action="/sign" method="post"> in guestbook.jsp >>> is expected to trigger doPost method in SignGuestBookServlet but instead, it >>> invoks doGet method in GuestbookServlet as it's the first servlet defined in >>> web.xml. Thus, it causes the error message like HTTP method POST is not >>> supported by this URL. >>> >>> I have been working on this issue for hours and finally I made it worked >>> but I have to delete the servlet guestbook from entries in <servlet/> and >>> <servlet-mapping/> in web.xml. But in tutorial, it didn't mention the >>> deletion. It also works if I moved up the servlet sign to the first entry. >>> I don't understand why it behaves like this. It looks to me that doGet >>> method in GuestbookServet other than doPost method in SignGuestbookServlet >>> gets invoked immediately after a user clicks Post Greetings, which posts >>> data in the form. Is there a order requirement in <servlet/> element? Or >>> should only one servlet defined in this section? Anyone know how does >>> invocation make on servlets in section of <servlet/> and <servlet-mapping/> >>> in web.xml ? Does invocation go through chains of servlet? >>> >>> After deletion, web.xml now looks like below: >>> <?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"; >>> xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; >>> xsi:schemaLocation="http://java.sun.com/xml/ns/javaee >>> http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; version="2.5"> >>> <servlet> >>> <servlet-name>sign</servlet-name> >>> <servlet-class>guestbook.SignGuestbookServlet</servlet-class> >>> </servlet> >>> <servlet-mapping> >>> <servlet-name>sign</servlet-name> >>> <url-pattern>/sign</url-pattern> >>> </servlet-mapping> >>> <welcome-file-list> >>> <welcome-file>guestbook.jsp</welcome-file> >>> </welcome-file-list> >>> </web-app> >>> >>> On Fri, Apr 16, 2010 at 12:42 PM, bosun <[email protected]> wrote: >>> >>>> Hi Chau, >>>> I used the code in the tutorial with a slightly change. Data is posted >>>> by POST method in the form so SignGuestbookServlet should use doPost to >>>> handle it. >>>> Anothe thing I am confused is that I can't see log message in Eclipse >>>> console if I added custom message like log.info or system.out.printlin >>>> alough I givie guestbook.level = INFO in logging.properties. >>>> >>>> Code below is SignGuestbookServlet.java: >>>> import com.google.appengine.api.users.UserService; >>>> import com.google.appengine.api.users.UserServiceFactory; >>>> public class SignGuestbookServlet { >>>> private static final Logger log = >>>> Logger.getLogger(SignGuestbookServlet.class.getName()); >>>> >>>> public void doPost(HttpServletRequest req, HttpServletResponse resp) >>>> >>>> throws IOException { >>>> UserService userService = UserServiceFactory.getUserService(); >>>> User user = userService.getCurrentUser(); >>>> >>>> String content = req.getParameter("content"); >>>> if (content == null) { >>>> content = "(No greeting)"; >>>> } >>>> if (user != null) { >>>> log.info("Greeting posted by user " + user.getNickname() + >>>> ": " + content); >>>> } else { >>>> log.info("Greeting posted anonymously: " + content); >>>> } >>>> resp.sendRedirect("/guestbook.jsp"); >>>> } >>>> } >>>> Code below is guestbook.jsp: >>>> >>>> <%@ page contentType="text/html;charset=UTF-8" language="java" %> >>>> <%@ page import="com.google.appengine.api.users.User" %> >>>> <%@ page import="com.google.appengine.api.users.UserService" %> >>>> <%@ page import="com.google.appengine.api.users.UserServiceFactory" %> >>>> <html> >>>> <body> >>>> <% >>>> UserService userService = UserServiceFactory.getUserService(); >>>> User user = userService.getCurrentUser(); >>>> if (user != null) { >>>> %> >>>> <p>Hi, <%= user.getNickname() %>! (You can >>>> <a href="<%= userService.createLogoutURL(request.getRequestURI()) >>>> %>">sign out</a>.)</p> >>>> <% >>>> } else { >>>> %> >>>> <p>Hello! >>>> <a href="<%= userService.createLoginURL(request.getRequestURI()) >>>> %>">Sign in</a> >>>> to include your name with greetings you post.</p> >>>> <% >>>> } >>>> %> >>>> Comment Board: >>>> <form action="/sign" method="post"> >>>> <div><textarea name="content" rows="3" cols="60"></textarea></div> >>>> <div><input type="submit" value="Post Greeting" /></div> >>>> </form> >>>> </body> >>>> </html> >>>> >>>> code below is GuestbookServlet.java: >>>> package guestbook; >>>> import java.io.IOException; >>>> import javax.servlet.http.*; >>>> import com.google.appengine.api.users.User; >>>> import com.google.appengine.api.users.UserService; >>>> import com.google.appengine.api.users.UserServiceFactory; >>>> >>>> @SuppressWarnings("serial") >>>> public class GuestbookServlet extends HttpServlet { >>>> public void doGet(HttpServletRequest req, HttpServletResponse resp) >>>> throws IOException { >>>> UserService userService = UserServiceFactory.getUserService(); >>>> User user = userService.getCurrentUser(); >>>> //log.info("user name is " + user.getNickname()); >>>> if (user != null) { >>>> resp.setContentType("text/plain"); >>>> resp.getWriter().println("Hello, " + user.getNickname()); >>>> } else { >>>> >>>> resp.sendRedirect(userService.createLoginURL(req.getRequestURI())); >>>> } >>>> } >>>> } >>>> >>>> On Fri, Apr 16, 2010 at 12:16 PM, Chau Huynh <[email protected]> wrote: >>>> >>>>> And next you'll need to post your servlet ;-) >>>>> >>>>> Just wonder if you code SignGuestbookServlet servlet yourself - in >>>>> such a case, you might code doGet() while your JSP posts to the servlet? >>>>> Error message from your post: "HTTP method POST is not supported by this >>>>> URL" >>>>> >>>>> >>>>> On Fri, Apr 16, 2010 at 10:59 PM, bosun <[email protected]> wrote: >>>>> >>>>>> Hi Rajeev, >>>>>> >>>>>> Thank you for helping me troubleshooting this issue. >>>>>> >>>>>> Below is web.xml >>>>>> >>>>>> <?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"; >>>>>> xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; >>>>>> xsi:schemaLocation="http://java.sun.com/xml/ns/javaee >>>>>> http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; version="2.5"> >>>>>> <servlet> >>>>>> <servlet-name>Guestbook</servlet-name> >>>>>> <servlet-class>guestbook.GuestbookServlet</servlet-class> >>>>>> <servlet-name>sign</servlet-name> >>>>>> <servlet-class>guestbook.SignGuestbookServlet</servlet-class> >>>>>> </servlet> >>>>>> <servlet-mapping> >>>>>> <servlet-name>Guestbook</servlet-name> >>>>>> <url-pattern>/guestbook</url-pattern> >>>>>> <servlet-name>sign</servlet-name> >>>>>> <url-pattern>/sign</url-pattern> >>>>>> </servlet-mapping> >>>>>> <welcome-file-list> >>>>>> <welcome-file>guestbook.jsp</welcome-file> >>>>>> </welcome-file-list> >>>>>> </web-app> >>>>>> >>>>>> below is appengine-web.xml >>>>>> >>>>>> <?xml version="1.0" encoding="utf-8"?> >>>>>> <appengine-web-app xmlns="http://appengine.google.com/ns/1.0";> >>>>>> <application></application> >>>>>> <version>1</version> >>>>>> >>>>>> <!-- Configure java.util.logging --> >>>>>> <system-properties> >>>>>> <property name="java.util.logging.config.file" >>>>>> value="WEB-INF/logging.properties"/> >>>>>> </system-properties> >>>>>> >>>>>> </appengine-web-app> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Fri, Apr 16, 2010 at 10:29 AM, Rajeev Dayal <[email protected]>wrote: >>>>>> >>>>>>> Can you post the contents of your web.xml file and your >>>>>>> appengine-web.xml file? >>>>>>> >>>>>>> On Thu, Apr 15, 2010 at 10:21 PM, bosun <[email protected]>wrote: >>>>>>> >>>>>>>> I forgot mention in my post about the version of Eclipse I am >>>>>>>> using is Galileo. I downloaded Google plugin for this version. >>>>>>>> >>>>>>>> The link to the Tutorial where I am stuck on is: >>>>>>>> http://code.google.com/intl/en/appengine/docs/java/gettingstarted/usingjsps.html >>>>>>>> >>>>>>>> In Eclipse console, all log messages after server restarted are like >>>>>>>> below: >>>>>>>> >>>>>>>> Apr 16, 2010 2:05:54 AM >>>>>>>> com.google.apphosting.utils.config.AppEngineWebXmlReader >>>>>>>> readAppEngineWebXml >>>>>>>> INFO: Successfully processed >>>>>>>> C:\EclipseGalileo\workspace\Guestbook\war\WEB-INF/appengine-web.xml >>>>>>>> Apr 16, 2010 2:05:54 AM >>>>>>>> com.google.apphosting.utils.config.AbstractConfigXmlReader >>>>>>>> readConfigXml >>>>>>>> INFO: Successfully processed >>>>>>>> C:\EclipseGalileo\workspace\Guestbook\war\WEB-INF/web.xml >>>>>>>> The server is running at http://localhost:8888/ >>>>>>>> Apr 16, 2010 2:07:08 AM >>>>>>>> com.google.appengine.tools.development.LocalResourceFileServlet doGet >>>>>>>> WARNING: No file found for: /favicon.ico >>>>>>>> Apr 16, 2010 2:07:25 AM >>>>>>>> com.google.appengine.tools.development.LocalResourceFileServlet doGet >>>>>>>> WARNING: No file found for: /favicon.ico >>>>>>>> >>>>>>>> Please advise where it goes wrong. >>>>>>>> >>>>>>>> Thanks! >>>>>>>> >>>>>>>> >>>>>>>> On Thu, Apr 15, 2010 at 9:57 PM, bobo <[email protected]>wrote: >>>>>>>> >>>>>>>>> Hi >>>>>>>>> >>>>>>>>> I run Google App Engine (Java) locally with Eclipse. Following the >>>>>>>>> tutorial of Getting Started - Java, I lean it step by step and my >>>>>>>>> local server works well until the section Using JSPs. After adding >>>>>>>>> SignGuestbookServlet.java and greeting form in guestbook.jsp as >>>>>>>>> well >>>>>>>>> as editing web.xml for servlet mapping for sign and /sign, I >>>>>>>>> restarted the server. My browser displayed error message >>>>>>>>> immediately >>>>>>>>> after I tried to post a greeting message: >>>>>>>>> >>>>>>>>> HTTP ERROR 405 >>>>>>>>> Problem accessing /sign. Reason: HTTP method POST is not >>>>>>>>> supported >>>>>>>>> by this URL >>>>>>>>> >>>>>>>>> In Eclipse console, the red error message like: >>>>>>>>> Apr 16, 2010 1:34:31 AM >>>>>>>>> com.google.appengine.tools.development.LocalResourceFileServlet >>>>>>>>> doGet >>>>>>>>> WARNING: No file found for: /favicon.ico >>>>>>>>> >>>>>>>>> I googled this error but seems no one having this problem before. >>>>>>>>> I >>>>>>>>> am stuck on this point and anyone who can shed me a light? >>>>>>>>> >>>>>>>>> Thanks! >>>>>>>>> >>>>>>>>> >>>>>>>> -- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "Google App Engine for Java" group. >>>>>>>> To post to this group, send email to >>>>>>>> [email protected]. >>>>>>>> To unsubscribe from this group, send email to >>>>>>>> [email protected]<google-appengine-java%[email protected]> >>>>>>>> . >>>>>>>> For more options, visit this group at >>>>>>>> http://groups.google.com/group/google-appengine-java?hl=en. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "Google App Engine for Java" group. >>>>>>> To post to this group, send email to >>>>>>> [email protected]. >>>>>>> To unsubscribe from this group, send email to >>>>>>> [email protected]<google-appengine-java%[email protected]> >>>>>>> . >>>>>>> For more options, visit this group at >>>>>>> http://groups.google.com/group/google-appengine-java?hl=en. >>>>>>> >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Google App Engine for Java" group. >>>>>> To post to this group, send email to >>>>>> [email protected]. >>>>>> To unsubscribe from this group, send email to >>>>>> [email protected]<google-appengine-java%[email protected]> >>>>>> . >>>>>> For more options, visit this group at >>>>>> http://groups.google.com/group/google-appengine-java?hl=en. >>>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Google App Engine for Java" group. >>>>> To post to this group, send email to >>>>> [email protected]. >>>>> To unsubscribe from this group, send email to >>>>> [email protected]<google-appengine-java%[email protected]> >>>>> . >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/google-appengine-java?hl=en. >>>>> >>>> >>>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google App Engine for Java" group. >>> To post to this group, send email to >>> [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]<google-appengine-java%[email protected]> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/google-appengine-java?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine for Java" group. >> To post to this group, send email to >> [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<google-appengine-java%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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