Hallo Walter, thanks for Your reply.
I have tried to understand what ist httpclient, but I am not shure if I am right. What I guess is that httpclient can manage the client-communication to a web server. That means I can make programs that interact with a webserver. (like calling an url with some data and process the response.) What I want to do is: inside my WebApp - when the User pressed a button - I want to redirect the User to another WebApp on another server provided with some post-data. The answer to this request to the second WebApp should never arrive at my WebApp but should be interpreted by the User's browser. Do You think, httpclient can help me doing this? Thanks, Georg 2009/4/21 Walter Mourão <[email protected]>: > Some time ago I wrote a small http proxy where an web service call generates > a http post. I used commons-httpclient: http://hc.apache.org/httpclient-3.x/ > and it was quite useful. > > Cheers, > > Walter Mourão > http://waltermourao.com.br > http://arcadian.com.br > http://oriens.com.br > > > > On Tue, Apr 21, 2009 at 7:58 AM, Georg Füchsle <[email protected]> > wrote: >> >> Hallo Simon, >> >> >> Yes You have understood right: I want the user's browser to call >> another server and dont want to continue processing my application >> afterwards. >> >> I also have thought about the JavaScript solution. >> But using a js solution generally I will write the xml-data into the >> user's html. I did'nt like to do that, because this (xml-)data grants >> You access to the other application. For this reason I wanted to hide >> the xml-data. But using get-Parameters the xml-data is visible the >> same. >> >> >> Maybe should think about a ajax- functionality like this: >> >> I use a commandbutton that supports ajax-request and a hidden form >> that makes a post-request. >> When the user clickes the commandbutton i can fill the data of the >> form via ajax and then in an after-ajax-event click the submit-button >> of the form via JavaScript. Do You think this will work? >> >> I hoped, there would be an more easy way.... >> >> Thank You for Your help. >> >> Regards >> >> >> Georg >> >> 2009/4/21 Simon Kitching <[email protected]>: >> > Georg Füchsle schrieb: >> >> hallo, >> >> >> >> >> >> I have to call another application out from JSF. >> >> To call this application i have to send (xml) data via post to the >> >> start-url of this application. >> >> >> >> I found some example on the web: >> >> >> >> <code> >> >> ExternalContext extContext = >> >> FacesContext.getCurrentInstance().ctx.getExternalContext(); >> >> String name = URLEncoder.encode("INTERFACENAME", "utf-8"); >> >> String someData = "<?xml version='1.0' encoding='UTF-8'?> <data> >> >> <caller value='giofyxle'/><app value='2'/></data></xml>"; >> >> String value = URLEncoder.encode(someData , "UTF-8"); >> >> String viewId = "http://www.server.com/startapp/index.html"+ '?' + >> >> name + "=" + value; >> >> String urlLink = extContext.encodeActionURL(viewId); >> >> extContext.redirect(urlLink); >> >> </code> >> >> >> >> >> >> I tried this code. its calls the new application, but the data is sent >> >> via GET: >> >> >> >> >> >> http://www.server.com/startapp/index.html?INTERFACENAME==%3C%3Fxml+version%3D%271.0%27+encoding..... >> >> >> >> So the intefacedata is easily be read by the user. Has anyone any idea >> >> how i can make a rediract with POST data? >> > >> > When you say "call another application out", do you mean that you want >> > the *user's browser* to send a POST command to some other server, and >> > then display the result returned from that server (without any further >> > processing)? >> > >> > HTTP provides no way to do this; the http-redirect facilities only do >> > GET commands. See the HTTP specification for more details. What your >> > code above does (extContext.redirect) just generates an http redirect >> > response, and the user's browser then processes this response and does >> > the redirect. >> > >> > HTML provides no way to do this either AFAIK. >> > >> > JSF just uses HTTP and HTML, so JSF also has no way to do this. I think >> > you will need to use javascript, ie generate an HTML page that contains >> > an html <form> with the fields you want, and some javascript that then >> > does document.getElementById(formId).submit() or something similar. >> > >> > >> > Or does "call another application out"mean that after a JSF submit, you >> > want *your server* to send a POST command to some other server, then >> > process the result before sending back a new page to the user? You can >> > use the apache commons-httpclient library to do things like this. >> > >> > Regards, >> > Simon >> > >> > -- >> > -- Emails in "mixed" posting style will be ignored >> > -- (http://en.wikipedia.org/wiki/Posting_style) >> > > >
