How To Control Httpwebrequest
Sep 19, 2008
Here is my code:
Code:
Public Function getHtml(ByVal url As String) As String
dim objrequest as httpwebrequest
dim objresponse as httpwebresponse
Try
[Code]...
My problem is: for some url that function takes a long time. So, i just want to cancel the response after a given time. I tried with a timer control but that is not working. What to do? How to modify this code so this function will return result within a given time whether httpwebresponse completed or not?
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Dec 28, 2011
What I would like to know is how to obtain form input elements during an httpwebrequest?
[Code]...
Is it possible to obtain these input elements during an httpwebrequest without having to view the html code?
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Mar 21, 2010
I have no idea how to use httpwebrequest anyone can show me an example of code to do the following
1.Navigate to website with cookies
2.use this cookies and website referrer to download file with direct url (url...)
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Jan 4, 2011
I am facing a strange problem with listbox. I need to scrab whois information. I used the following code to get source code of the whois query. It works fine if I use a textbox. But I need to use this for multiple url and therefore need to use lixtbox to loop through url list. Unfortunately when I use listbox1.selecteditem or listbox1.text it does not work. But this same code works with webbrowser.
Dim request As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create("http://www.networksolutions.com/whois/results.jsp?domain=" & listbox1.selecteditem)
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)"
[code]....
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Jul 4, 2011
I'm building this class to download files in parts/sections/segments. In .NET 4.0, I can use this code to specify the range to download from
long startPos = int.MaxValue+1;
HttpWebRequest.AddRange(startPos);
and it works because there is a long overload for the AddRange method. When I looked up the .NET 3.5 version, I realised the AddRange() method allows using int only. The possible workaround would be using the AddRange(string, int) or AddRange(string, int, int) methods. Since the class will have to work in .NET 3.5, I'll have to go with the string specification but unfortunately I can't seem to find any sample code that shows how to specify ranges using this procedure in .NET 3.5. Can anyone show be how to do this?As the first code sample I wrote shows, I would like to specify a range of type long instead of int. Using type int allows requesting for byte ranges only up to 2GB but long allows requesting for byte ranges beyong 2GB.
The question therefore is: How do I specify byte ranges of 2GB or higher on HttpWebRequest in .NET 3.5?
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Dec 8, 2010
i allways get an Out of Mem Exception and the usage of my memory is growing and growing in the taskmanager when i execute follwowing source code:
Imports System.Net
Imports System.Text
Imports System.IO
[code].....
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Oct 6, 2009
how to write a httpwebrequest, however i'm unsure of how to write it with a if...statement. I have a file that I need to download, however it ususally doesn't get posted until sometime Tuesday afternoon, so what I need to do is have the program continually check say once about every 5 minutes until the file has been posted and then download it.I'm presumming using an if...statement is the best way to accomplish this, basically if true(file exists) then proceed, else wait 5 minutes and rerun process.
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Jun 27, 2012
How to successfully log into a DSL-Router (Model: Speedport w504v Type A).I wrote a function usinig HttpWebRequest and HttpWebResponse. So far this function is not finished and is only for finding out the right login process.[cde]...
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Mar 22, 2011
can any one see any thing wrong with my code. I swear it did work once or twice. * code now removed as updated below
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Oct 5, 2009
use a If then Statement with Httpwebrequest? Let me explain my senario. I have a file that needs to be downloaded from a web site once it is posted. Currently one of our staff manually goes out to the web site multiple times to check to see if the file has been posted, they then download the file, extract it's contents and use some of the info for reports that must be sent out the same day.
[Code]...
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Apr 19, 2010
I am trying to write a program that goes to a webpage and gets the html and puts it into a mshtml document but I always get an error. I know this example works when the webpage doesn't require Credentials. By the way i'm using vb 2008 express.
Dim theCredential As New System.Net.NetworkCredential("username", "password")
Dim Doc As mshtml.IHTMLDocument2
[code]....
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Jun 11, 2010
I'm pretty sure that I need to use Httpwebrequest "POST" method for this although Im unsure as to the exact syntax to use. I need to do a xml query to a remote web site, something like <node>" "</node, <price>" "</price> and then collect that data and import it directly into a sql table. Any suggestions or directions?
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Apr 6, 2010
I have a program that will register you for a certain website using textboxes and stuff but I have an invisible web browser and it just enters the text into the right spots and clicks the button.I was told that I can get rid of the web browser and do the whole thing faster and easier using "HttpWebRequest and HttpWebResponse".
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May 24, 2011
Dim s As HttpWebRequest
Dim username= "username=" + HttpUtility.UrlEncode("username")
Dim message = "message=" + HttpUtility.UrlEncode("message")
Dim sep = "&"
Dim sb As New StringBuilder()
[Code]...
How do i reponse.write the result to the screen? I get errors like..Value of type 'System.Net.WebResponse' cannot be converted to 'String'.
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Apr 3, 2012
I have created a httpwebrequest connection to a streaming API after trying a tTCPClient which just never ended up working. My concern is whether my code is correct and that I am actually reading in new data and that the connection is maintained. Initially I had been reading into a buffer and just loaded everything into a file after max size, but figured it would be simpler to read a line, since each entry was being sent delimited by line feeds.
rStream = webrequest.GetResponse().GetResponseStream
rStream = New GZipStream(rStream, CompressionMode.Decompress)
If rStream.CanRead then
[code]....
It looks like I am continuously reading and not sure if I am reading redundant data here. Also another question is that if I were to use a thread to appendToFile, would that maintain the connection to the stream?
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Apr 2, 2012
I have a problem when trying to send a POST request. The sending method looks like this:
Public Sub SendXML(ByVal file As String)
Dim reader As New StreamReader(file)
Dim data As String = reader.ReadToEnd()
[Code]....
Now looking at this I suspected that it was due to the fact that the server does not accept POST messages. But some other reading suggests that the the URI [URL] has been generated with a proxy and should be /Request so the line should read POST /Request HTTP/1.1
So what would be the common reason for this? And if it is a proxy problem, how is it sorted?
As asked below, I have created a new question for the more specific request. Changing absolute URI to relative in HTTP POST header
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Jan 28, 2012
I am a newb to vb.net(visual studio 2008).i am trying to make an app using vb.net which can be used to login to a website and browse that website without using webbrowser(i dont want to use webbrowser of vb.net).i got a code for this from net ;I have made a temporary login webpage using php and mysql in my computer(its working properly).[code]...
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Jun 9, 2010
differences between HttpWebRequest and WebClient and why I should use either.
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Nov 28, 2010
I want to download a file using an HTTPWebRequest. I found sample code, but it seems a bit outdated. What i have:
Imports System.IO
Imports System.Net
Imports System.Text[code].....
It seems that WebRequestFactory doesn't exist. Is there a better way to do this? Or how can i fix it?
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Feb 12, 2010
I noticed that HttpWebRequest freezes the UI while it's waiting for a web page to be downloaded:
[code]
If someone's done this before, what is a good way to keep the application responsive?
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Jun 2, 2009
Is there any way to download only a part of a web-page? What I have is a program that downloads periodically (every 5 sec) a web-page and displays some real time information. So I would like to minimize the bandwidth as much as posible.
I have seen that many download managers have the ability to resume a download, so they actually have the ability to start from somwhere in the midle. So can I do that with a single web-page and without messing with the sockets if posible?
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Jan 3, 2012
I understand the basics of httpwebrequest and I'm not looking for any answers on web browsers. My previous method was done using webbrowsers but because of the lack of speed I have transferred over to httpwebrequest to speed up the process.
I have an id of an element that I would like to grab and use in an httpwebrequest but not sure where I would start with that.
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Jun 10, 2011
When I try this code, Content Length is always -1.
Dim Request As HttpWebRequest = DirectCast(WebRequest.Create("http://www.google.com"), HttpWebRequest)
Dim Response As HttpWebResponse = Request.GetResponse()
[Code]....
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Apr 30, 2010
How can i make a program that would login to website?
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May 26, 2011
I am using an httpWebRequest in my windows app to download files from a webserver (sURL), to a local folder (fileDestination) as such:
Public Function DownloadFile(ByVal sURL As String, _
ByVal fileDestination As String, _
ByVal WebRequestType As String) As Boolean
Dim URLReq As HttpWebRequest
Dim URLRes As HttpWebResponse
[Code] .....
This works fine for the first few files. But then it starts giving the error:
"operation has timed out"
on the URLReq.GetResponse line.
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Sep 29, 2010
Dim request As HttpWebRequest = DirectCast(HttpWebRequest.Create(url), HttpWebRequest)
Using stream As System.IO.Stream = request.GetResponse().GetResponseStream()
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Jul 27, 2009
I have a small app that checks an IP, works perfectly as a Forms App but does nothing when I convert it too a service.
[Code]...
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Apr 26, 2010
I have a script returns a string:
[URL]
PHP script:
$data = $_GET['q'];
$query = "SELECT * FROM `table` WHERE ID = '$data'";
$result = mysql_query($query);
[Code].....
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May 26, 2010
I am working on a Geocoding app where I put the address in the URL and retreive the XML. I need the complete XML response for this project. Is there any other class for downloading the XML from a website that may be faster than using WebClient or HttpWebRequest? Can the XMLReader be used to get the full XML without string manipulation and would that be faster and/or more efficient?
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Oct 19, 2008
i am trying to submit webform on one site.it is aspx site.In this form there is only one field in which i have to enter my email address and submit it.i am able to achive following so far.1)Using httpwebrequest i got the webpage with cookie maintain in cookiecontainer properly.i have analyze the form and it is submitting __viewstate1 and other value from that form to action attribute of form.i think i have success fully submitted my data to server but it is not responding the way it should.(like after submitting my email address it should send email to my account) rather server response is same web form.(i think it is ok coz data to be submitted to same webform)but in response server should add my email address to its new response telling email is send to XXXYYY account.
following is my code.
Code:
Dim action As String
Dim submit_data As String
temp2 = htmldoc.getElementById("FileBuilding")
action = temp2.getAttribute("action")
[code]....
and all variable like event_arg ,viewsource1,2,3 etc have proper data.
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