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Java Forum / General / January 2007servlet and forms and long strings
Hi, I have a form that the user enters information into. This information is then passed to a servlet for processing. The problem is the form doesnt seem to pass strings of more than one word . eg. if I put in "java" , this will be passed to the servlet , but if i put in "java program" it does not work. Its being passed using: query = request.getParameter("fieldname"); The form uses the POST method Does anyone know why? > Hi, > I have a form that the user enters information into. This information [quoted text clipped - 9 lines] > > Does anyone know why? Does your form look more or less like this: <form action="/myapp/" method="post> <input name="fieldname" value="" /> <input type="submit" /> </form> Anyway, its impossible for us to know why without a lot more context about whats going on. When you say it does not work, that can mean many many things. Does it 404? Does it 500? Does it give the wrong results? Do you log the value to verify that the value is not what you expect? So, help us help you, give us some details. Hope this helps, Daniel. Yes, the form is pretty much identical to that. What I'm writing is a form of metasearch. My form takes in a query and sends the query to appropriate engine. It does'nt give a 404 or 500, it just returns a blank page. With a one word query it returns the correct page. If I get the query using the above and then use out.println(query) ............it will print the correct query, so I figure its no passing the value(if its a multiple word query) from the servlet to the search engine. > Yes, the form is pretty much identical to that. What I'm writing is a > form of metasearch. My form takes in a query and sends the query to [quoted text clipped - 5 lines] > figure its no passing the value(if its a multiple word query) from the > servlet to the search engine. It could also be that you need to escape multi-word queries. Its hard to tell without knowing your search index. "Damo" <cormacdebarra@gmail.com> said: >Yes, the form is pretty much identical to that. What I'm writing is a >form of metasearch. My form takes in a query and sends the query to [quoted text clipped - 5 lines] >figure its no passing the value(if its a multiple word query) from the >servlet to the search engine. Hmm, this isn't nice. You're changing your problem description. At first you let us know that information is not getting passed to the servlet. Now you're telling that you can see the information in the servlet. So, the form part of the question is irrelevant; the issue is what does your servlet do to the string it received - how it is passed on, and what kind of interface there is to the search side.  SignatureWolf a.k.a. Juha Laiho Espoo, Finland (GC 3.0) GIT d- s+: a C++ ULSH++++$ P++@ L+++ E- W+$@ N++ !K w !O !M V PS(+) PE Y+ PGP(+) t- 5 !X R !tv b+ !DI D G e+ h---- r+++ y++++ "...cancel my subscription to the resurrection!" (Jim Morrison) > "Damo" <cormacdebarra@gmail.com> said: > >Yes, the form is pretty much identical to that. What I'm writing is a [quoted text clipped - 14 lines] > is what does your servlet do to the string it received - how it is > passed on, and what kind of interface there is to the search side. Yeah, It could be that he worked out that it wasn't the problem he thought it was, and instead was a different problem. I'm assuming since he hasn't posted a question since then (which he hasn't), he's figured out the rest on his own. I was away for the last day. I've discovered its nothing to do it passing long Strings(Sorry!). The right query is forwarded. Whats causing the problem is a ParserConfigurationException. I dont know why this would happen though, it only appears with multiple word queries. > I was away for the last day. > I've discovered its nothing to do it passing long Strings(Sorry!). The > right query is forwarded. Whats causing the problem is a > ParserConfigurationException. I dont know why this would happen though, > it only appears with multiple word queries. What search engine are you using? > What search engine are you using? yahoo. . It works fine with asingle word query Its a 400 error the browser is returning . the URL that i am sending to the search engine would be in the form : http://search.yahoo.com/search?&p=java program&n=100 If you type this directly into the browser yahoo will add "%20" between java and program. So i guess if you're opening a connection from a program it does'nt do this. Can I account for this before i send the query? > Its a 400 error the browser is returning . > the URL that i am sending to the search engine would be in the form : [quoted text clipped - 5 lines] > So i guess if you're opening a connection from a program it does'nt do > this. Can I account for this before i send the query? Look at java.net.URLEncoder Specifically, java.net.URLEncoder.encode(urlString, "UTF-8"); excellent, cheeers ... that did the trick > Hi, > I have a form that the user enters information into. This information [quoted text clipped - 9 lines] > > Does anyone know why? This should give you the exact word(s) typed in. Try changing the form method (for debugging purposes) to GET, and see if the URL you get on the browser address bar shows the string. The string should show up as escaped (something like query.do?fieldname=java+program. Other than that, given the context and info you provided, there seems to be no reason for the string to break between the browser and the servlet. -cheers, Manish Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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