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. 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