I have two asp pages on the same server. The first one generates XML dynamically using querystring informations and session information. The second one reads the first one using an XMLHTTP object and do things using the XML datas.
However, my problem is that the XMLHTTP request is done server-side. Thus, the session variables of the client are not accessible when the xml should be generated.
How can I do so that the page that generates the XML receives the session variables ?
Thanks.
There are many problems with what you are trying to do, not least is that it can lead a busy server to lock up entirely.
Here is the another approach.
Add a third page to your solution. This page contains simply a function which returns an XML DOMDocument. This function contains all the logic from your original xml generating page but builds the XML into the DOM (which you were probably doing all ready right?).
Now your original page simply includes this new function page, calls the function and sends the DOM to the response:
<!-- #include file="xmlFunction.asp" -->
<%
Response.ContentType = "text/xml"
Response.CharSet = "UTF-8"
GenerateXml().Save Response
%>
Your client page can now look this
<!-- #include file="xmlFunction.asp" -->
<%
. . .
Dim dom: Set dom = GenerateXml()
''# Code that uses the XML in the dom.
%>
No additional "Request to self" is needed hence no potential lock up. Since code in the xmlFunction.asp is running as part of the original request the appropriate Session object is accessible.
Related
I am having VB Script in ASPX page.I need to use that Script in codeBehind in Page _load with in a For loop,for each iteration.
My Code is :-
(.ASPX Page with VB Script. )
<script type="text/vbscript" language="vbscript" >
sub wordit()
'Opens Word application and does some process
end sub
</script>
VB Code Behind Part:-
For i As Integer = 1 To colSelRowIndex
CheckboxTemplateId = colSelRowKeys(i).ToString 'I get the ID from here
ViewState("TemplateID") = CheckboxTemplateId 'I need to send the value to the sub routines
hen()'sub
den()'sub
cs.RegisterStartupScript(cstype, csname1 & i, "wordit();", True)
Next
I need to open a word doc for an ID and another document for another ID from the loop.
Try this:
For i As Integer = 1 To 10
cs.RegisterStartupScript(cstype, csname1 & i, "wordit();", True)
Next
That second argument in that function call is looking for a unique key. This is a feature, to prevent accidentally programmatically adding the same script more than once. If you want to do it on purpose, you need a unique key each time.
But that you want to do this at all indicates a possible fundamental misunderstanding about what's going on. While your server code (including Page_Load) is running, your client page in the web browser doesn't exist. The purpose of the server code is always to generate an html response to web request. The server code can never directly manipulate a page DOM.
Obviously this is true for a first request to a page in session: the server must first generate the initial page to send the client. But even on subsequent postbacks, the browser will destroy the prior instance of a page. The server must rebuild the entire page from scratch. Every. Time. While this happens, the page you're looking at in your browser window is only a sort of after-image. The browser has already destroyed any prior DOM, and is waiting for the server to supply a whole new set of HTML.
I also wonder at your use of vbscript, rather than javascript. Using vbscript pretty much guarantees you're page will only work with Internet Explorer.
I have an ASP.NET (.NET v4) web application running on IIS 7.5. I have a 3rd party which wants to pass information to my system. They support passing this information using HTTP POST, the information they provide is:
"This method simply calls a script on your server and passes each
field as a CGI variable. When you have received the data your server
should return a '1' on a line by itself to indicate success. Anything
else will generate an error on our server which will be investigated.
To set up this delivery method we need a URL to post to. We can use
HTTP or HTTPS."
My web application currently implements many WCF services but as I don't know what the variables passed in will be I cannot define a specific contract. Can I create a normal aspx page which they can post to and then read each of the parameters passed and do the appropriate processing.
If I do this how do I send back a line containing '1'?
Do I need to do anything else to make this HTTP POST compatible.
The last time I had to tackle a similar situation, i did it using a standard ASPX page, and it all worked quite well.
In my case the output was XML, so I had to make sure that I changed the output mime type to match "text/xml" in my case.. "text/plain" I would guess in yours..
Anyway, C# sharp code below, and make sure that your ASPX file has ONLY the very top line in, that is:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="register.aspx.cs" Inherits="myservices.register" ContentType="text/xml" %>
and nothing else, no carriage returns or anything.
Then do all your work in the code behind:
protected void Page_Load(object sender, EventArgs e)
{
Response.Clear();
Response.ContentType = "text/plain";
//Get your CGI variables here... you will have to get them to tell you what to expect
string myparam = (string)Request.QueryString["myparam"];
//do what ever you need here with your variables
Response.Write("1");
Response.End();
}// End page load handler
If you need to follow the one with a carriage return, then i believe you can use the carriage return property in the system.environment object, but I've not got doc's to hand to look it up. That should however get you started.
The MOST important thing to remember is to make sure NOTHING is output from the aspx, not even a carriage return.
I've previously written an article on my Blog about how to use this method for producing phone directories for Cisco-IP phones if you want to read it. You can find it here: http://shawtyds.wordpress.com/2009/09/26/cisco-ip-phone-directories-using-c/
I've found a few posts about retrieving HTML from an ASPX page, mostly by overriding the render method, using a WebClient, or creating an HttpWebRequest. All these methods return the HTML of the page as it's loaded, but I was hoping to actually retrieve the HTML after the user has entered information.
The purpose behind this is that I work in IT, and I'm attempting to build a logging library that has an overload that essentially does a "screen-scrape" on the page just as the user encounters an exception, that way I can log the exception, and create an HTML file in a sub-directory of the logging directory that shows the page exactly as the user had it before clicking "submit" or having some other random error, and add an "ID" to the error that's logged telling whoever is fixing the issue which page to look at.
I hope I've provided enough information, because I really have no idea where to start.
Also, We'd like to do this through our own library, because our logging library is included in our common library, and many of our common library functions use our logging class.
Hmmm...
If you want to see what the user sees after they've been using the page, you're most likely going to have to do some fancy client-side scripting.
A naive approach:
When the clicks the submit button, fire a JavaScript event that encodes the DOM and either passes it as a form variable to the server, or executes a separate AJAX request with the encoded data as a parameter. ("Encode" in this case may be as simple as grabbing document.innerHtml, but I haven't checked.)
This potentially introduces a lot of overhead to every form submission, so I'd keep it out of production code.
I'm not sure why you need the rendered HTML as part of your exception log - I've never found it necessary for server-side debugging.
You getting HTML code from a website. You can use code like this.
string urlAddress = "http://www.jobdoor.in";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlAddress);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
Stream receiveStream = response.GetResponseStream();
StreamReader readStream = null;
if (response.CharacterSet == null)
readStream = new StreamReader(receiveStream);
else
readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));
string data = readStream.ReadToEnd();
response.Close();
readStream.Close();
}
I want to create an html page inside a asp.net page using c# and then request that html page. The flow is, I'll be creating a request that will give me a response with some values. Those values will be stored in hidden fields in the html page I'm creating on the fly and then requesting. I figure it would be something like below but I'm not sure if it would work, I've also received some "Thread Aborting" errors. So, does anyone know the proper way to do this or at least direct me to a nice article or something?
StringBuilder builder = new StringBuilder();
builder.Append("<html><head></head>");
builder.Append("<body onload=\"document.aButton.submit();\">");
builder.Append("<input type=\"hidden\" name=\"something\" value=\"" + aValue + "\">");
HttpContext.Current...Response.Write(builder.ToString());
... end response
This is a very common request and is almost never a good idea. What are you trying to do?
That said: you write out a file with a temporary name and redirect to that file. Later you have to figure out when it's safe to delete the file.
Edit That method points out one of the problems: you have to do your own garbage collection, deciding how long files must be kept around and deleting them appropriately.
I mean, like php'h include...
something like
my_file_to_be_included = "include_me.asp"
-- >
for what I've seen so far, there are a couple of alternatives, but every one of them has some sort of shortcoming...
what I'm trying to figure out is how to make a flexible template system... without having to statically include the whole thing in a single file with a loooooong case statement...
here there are a couple of links
a solution using FileSysmemObject, just lets you include static pages
idem
yet another one
same thing from adobe
this approach uses Server.Execute
but it has some shortcomings I'd like to avoid... seems like (haven't tried yet) Server.Execute code runs in another context, so you can't use it to load a functions your are planning to use in the caller code... nasty...
same thing
I think this one is the same
this looks promising!!!
I'm not sure about it (couldn't test it yet) but it seems like this one dinamycally handles the page to a SSDI component...
any idea???
No you can't do a dyanmic include, period.
Your best shot at this is a server.execute and passing whatever state it needs via a Session variable:-
Session("callParams") = BuildMyParams() 'Creates some sort of string
Server.Execute(my_file_to_be_included)
Session.Contents.Remove("callParams")
Improved version (v2.0):
<%
' **** Dynamic ASP include v.2.0
function fixInclude(content)
out=""
if instr(content,"#include ")>0 then
response.write "Error: include directive not permitted!"
response.end
end if
content=replace(content,"<"&"%=","<"&"%response.write ")
pos1=instr(content,"<%")
pos2=instr(content,"%"& ">")
if pos1>0 then
before= mid(content,1,pos1-1)
before=replace(before,"""","""""")
before=replace(before,vbcrlf,""""&vbcrlf&"response.write vbcrlf&""")
before=vbcrlf & "response.write """ & before & """" &vbcrlf
middle= mid(content,pos1+2,(pos2-pos1-2))
after=mid(content,pos2+2,len(content))
out=before & middle & fixInclude(after)
else
content=replace(content,"""","""""")
content=replace(content,vbcrlf,""""&vbcrlf&"response.write vbcrlf&""")
out=vbcrlf & "response.write """ & content &""""
end if
fixInclude=out
end function
Function getMappedFileAsString(byVal strFilename)
Dim fso,td
Set fso = Server.CreateObject("Scripting.FilesystemObject")
Set ts = fso.OpenTextFile(Server.MapPath(strFilename), 1)
getMappedFileAsString = ts.ReadAll
ts.close
Set ts = nothing
Set fso = Nothing
End Function
execute (fixInclude(getMappedFileAsString("included.asp")))
%>
Sure you can do REAL classic asp dynamic includes. I wrote this a while back and it has opened up Classic ASP for me in a whole new way. It will do exactly what you are after, even though people seem to think it isn't possible!
Any problems just let me know.
I'm a bit rusty on classic ASP, but I'm pretty sure you can use the Server.Execute method to read in another asp page, and then carry on executing the calling page. 15Seconds had some basic stuff about it - it takes me back ...
I am building a web site where it would have been convenient to be able to use dynamic includes. The site is all ajax (no page reloads at all) and while the pure-data JSON-returning calls didn't need it, all the different html content for each different application sub-part (window/pane/area/form etc) seems best to me to be in different files.
My initial idea was to have the ajax call be back to the "central hub" main file (that kicks the application off in the first place), which would then know which sub-file to include. Simply including all the files was not workable after I realized that each call for some possibly tiny piece would have to parse all the ASP code for the entire site! And using the Execute method was not good, both in terms of speed and maintenance.
I solved the problem by making the supposed "child" pages the main pages, and including the "central hub" file in each one. Basically, it's a javascript round-trip include.
This is less costly than it seems since the whole idea of a web page is that the server responds to client requests for "the next page" all the time. The content that is being requested is defined in scope by the page being called.
The only drawback to this is that the "web pieces" of the application have to live partly split apart: most of their content in a real named .asp file, but enough of their structure and relationship defined in the main .asp file (so that, for example, a menu item in one web piece knows the name to use to call or load another web piece and how that loading should be done). In a way, though, this is still an advantage over a traditional site where each page has to know how to load every other page. Now, I can do stuff like "load this part (whether it's a whole page or otherwise) the way it wants to be loaded".
I also set it up so each part can have its own javascript and css (if only that part needs those things). Then, those files are included dynamically through javascript only the first time that part is loaded. Then if the part is loaded repeatedly it won't incur an extra overhead.
Just as an additional note. I was getting weird ASCII characters at the top of the pages that were using dynamic includes so I found that using an ADODB.Stream object to read the include file eliminated this issue.
So my updated code for the getMappedFileAsString function is as follows
Function getMappedFileAsString(byVal strFilename)
Dim fso
Set fso = CreateObject("ADODB.Stream")
fso.CharSet = "utf-8"
fso.Open
fso.LoadFromFile(Server.MapPath(strFilename))
getMappedFileAsString = fso.ReadText()
'Response.write(getMappedFileAsString)
'Response.End
Set fso = Nothing
End Function