Questions tagged [webrequest]
WebRequest is an abstract class in .NET Framework for making requests to URIs (including HTTP, HTTPS, FTP and FILE protocols). Related tags: [httpwebrequest], [ftpwebrequest].
webrequest
1,605
questions
181
votes
11
answers
452k
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HttpWebRequest using Basic authentication
I'm trying to go through an authentication request that mimics the "basic auth request" we're used to seeing when setting up IIS for this behavior.
The URL is: https://telematicoprova.agenziadogane....
- 2,527
139
votes
13
answers
173k
views
Cannot set some HTTP headers when using System.Net.WebRequest
When I try to add a HTTP header key/value pair on a WebRequest object, I get the following exception:
This header must be modified using the appropriate property
I've tried adding new values to ...
- 17.4k
124
votes
4
answers
209k
views
How do I use WebRequest to access an SSL encrypted site using HTTPS?
I'm writing a program that reads content from a user provided URL. My problem is in the code that goes something like this:
Uri uri = new Uri(url);
WebRequest webRequest = WebRequest.Create(uri);
...
- 4,480
112
votes
4
answers
265k
views
Cannot send a content-body with this verb-type
I just got this exception (ProtocolViolationException) in my .NET 2.0 app (running on windows mobile 6 standard emulator). What confuses me is that as far as i know, I have not added any content body,...
- 6,743
88
votes
2
answers
161k
views
How to get json response using system.net.webrequest in c#?
I need to get json data from an external domain.
I used WebRequest to get the response from a website.
Here's the code:
var request = WebRequest.Create(url);
string text;
var response = (...
- 5,200
82
votes
2
answers
225k
views
How do you send an HTTP Get Web Request in Python? [duplicate]
I am having trouble sending data to a website and getting a response in Python. I have seen similar questions, but none of them seem to accomplish what I am aiming for.
This is my C# code I'm trying ...
- 1,326
82
votes
3
answers
142k
views
Which versions of SSL/TLS does System.Net.WebRequest support?
Now that SSL 3 has been found to be vulnerable to the POODLE attack:
Which versions of SSL/TLS does System.Net.WebRequest use when connecting to any https Uri?
I use WebRequest to connect to ...
- 21.6k
72
votes
10
answers
71k
views
Mono https webrequest fails with "The authentication or decryption has failed"
I'm making a simple REST client to use in my C# applications. In .net on Windows It works great with http:// and https:// connections. In mono 2.6.7 (Also tested with 2.8 with the same results) on ...
- 16.6k
55
votes
4
answers
82k
views
Forcing Basic Authentication in WebRequest
I am integrating web service that will use an
HTTP-POST to request and retrieve data. The remote server
requires basic authentication as per RFC 2617
My attempts to authenticate are failing.
It ...
- 653
55
votes
7
answers
111k
views
Test if a website is alive from a C# application
I am looking for the best way to test if a website is alive from a C# application.
Background
My application consists of a Winforms UI, a backend WCF service and a website to publish content to the UI ...
- 10.4k
54
votes
1
answer
69k
views
HttpWebRequest: Add Cookie to CookieContainer -> ArgumentException (Parametername: cookie.Domain)
I'm trying to login to a website via my application.
What I did:
First I figured out how the browser does the authorization process with Fiddler.
I examined how the POST request is built and I tried ...
- 4,502
49
votes
4
answers
83k
views
Making a web request to a web page which requires windows authentication
I am trying to make a request to a web page using WebRequest class in .net. The url that I am trying to read requires Windows Authentication due to which I get an unauthorised exception. How can I ...
- 17.1k
49
votes
10
answers
217k
views
Reasons for a 409/Conflict HTTP error when uploading a file to sharepoint using a .NET WebRequest?
I've got a method that uses a WebRequest to upload a file to a sharepoint 2010 list/folder, using a PUT request, with the Overwrite Header set to T (overwrite).
When several files are uploaded (...
- 5,133
47
votes
10
answers
68k
views
HttpWebRequest times out on second call
Why does the following code Timeout the second (and subsequent) time it is run?
The code hangs at:
using (Stream objStream = request.GetResponse().GetResponseStream())
and then causes a ...
- 11.3k
40
votes
4
answers
141k
views
How to force WebRequest to send Authorization header during POST
When using WebRequest to send a POST, the Authorization header is not sent with the request even though I have manually set the header and set PreAuthenticate to true, eg:
webRequest.Headers["...
- 1,771
36
votes
6
answers
16k
views
Mocking WebResponse's from a WebRequest
I have finally started messing around with creating some apps that work with RESTful web interfaces, however, I am concerned that I am hammering their servers every time I hit F5 to run a series of ...
- 28.7k
35
votes
7
answers
37k
views
Is WebRequest The Right C# Tool For Interacting With Websites?
I'm writing a small tool in C# which will need to send and receive data to/from a website using POST and json formatting. I've never done anything like this before in C# (or any language really) so I'...
Lee
32
votes
2
answers
66k
views
Creating WPF BitmapImage from MemoryStream png, gif
I am having some trouble creating a BitmapImage from a MemoryStream from png and gif bytes obtained from a web request. The bytes seem to be downloaded fine and the BitmapImage object is created ...
- 10.5k
31
votes
1
answer
35k
views
How to Replace WebClient with HttpClient?
I have the following WebClient inside my asp.net mvc web application:
using (WebClient wc = new WebClient()) // call the Third Party API to get the account id
{
string url = currentURL + "...
29
votes
3
answers
65k
views
C# - How to make a HTTP call
I wanted to make an HTTP call to a website. I just need to hit the URL and dont want to upload or download any data. What is the easiest and fastest way to do it.
I tried below code but its slow and ...
- 371
28
votes
4
answers
11k
views
HttpWebRequest to URL with dot at the end
when i do a GET with WebRequest.Create("http://abc/test.") i get 404 because according to fiddler the trailing dot gets stripped away by .NET and the web server needs the dot. how can i prevent that ...
ado
27
votes
3
answers
56k
views
Using HTTP Authentication with a C# WebRequest
I want to make a web request to a page that needs authenticating. How would I go about doing this? I found something that said possibly to use the Credentials property, but I'm not sure how to use it.
- 44k
25
votes
4
answers
26k
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Multithreading a large number of web requests in c#
I have an program where I need to create some large number of folders to an external sharepoint site (external meaning I can't use the sharepoint object model). Web requests work well for this, but ...
- 253
22
votes
5
answers
38k
views
How can I do digest authentication with HttpWebRequest?
Various articles (1, 2) I discovered make this look easy enough:
WebRequest request = HttpWebRequest.Create(url);
var credentialCache = new CredentialCache();
credentialCache.Add(
new Uri(url), // ...
- 9,512
21
votes
0
answers
16k
views
How to properly catch a 404 error in .NET [duplicate]
Possible Duplicate:
How can I catch a 404?
I would like to know the proper way to catch a 404 error with c# asp.net here is the code I'm using
HttpWebRequest request = (HttpWebRequest) ...
- 64.1k
20
votes
6
answers
24k
views
What makes this HTTPS WebRequest time out even though it works in the browser?
Here's my request:
var request = (HttpWebRequest) WebRequest.Create("https://mtgox.com/");
request.CookieContainer = new CookieContainer();
request.AllowAutoRedirect = false;
request.Accept = "text/...
- 1,100
20
votes
5
answers
111k
views
How to use WebRequest to POST some data and read response?
Need to have the server make a POST to an API, how do I add POST values to a WebRequest object and how do I send it and get the response (it will be a string) out?
I need to POST TWO values, and ...
- 43.3k
20
votes
5
answers
55k
views
Starting async method as Thread or as Task
I'm new to C#s await/async and currently playing around a bit.
In my scenario I have a simple client-object which has a WebRequest property. The client should send periodically alive-messages over ...
- 3,727
20
votes
6
answers
4k
views
How to calculate HttpWebRequest spent outbound and inbound internet traffic
I have the below function to fetch a page. My question is i want to calculate how much internet connection is spent
Both inbound (download) and outbound traffic (sent)
How can i do that ? Thank you
...
- 23.4k
19
votes
4
answers
26k
views
"too many automatic redirections were attempted" error message when using a httpWebRequest in .NET
I am attempting to request a page like "http://www.google.com/?q=random" using the webrequest class in vb.net.
we are behind a firewall, so we have to authenticate our requests.
I have gotten past the ...
- 612
19
votes
2
answers
20k
views
how to change originating IP in HttpWebRequest
I'm running this application on a server that has assigned 5 IPs. I use HttpWebRequest to fetch some data from a website. But when I make the connection I have be able to specify which one of the 5 ...
- 982
19
votes
4
answers
34k
views
Reading data from an open HTTP stream
I am trying to use the .NET WebRequest/WebResponse classes to access the Twitter streaming API here "http://stream.twitter.com/spritzer.json".
I need to be able to open the connection and read data ...
- 389
18
votes
3
answers
29k
views
How to get website title from c#
I'm revisiting som old code of mine and have stumbled upon a method for getting the title of a website based on its url. It's not really what you would call a stable method as it often fails to ...
- 19.2k
18
votes
3
answers
30k
views
Does any one know about this error: "Wrong Local header signature: 0x6D74683C"?
The following code is used to download a zip file and unzip it on phone.
The same code used to work on WP7, I started tested on WP8 device, and strange thing is happening... now it works on WP8 but ...
- 1,189
18
votes
2
answers
2k
views
Bandwidth Shaping in my C# application
I have a C# application that uses a native library that sends video to other IP over the internet using UDP. I have no traffic control over that library.
My application also calls web services of ...
- 1,594
17
votes
1
answer
23k
views
powershell curl and WebRequest both follow redirects
I was trying to figure out the status code returned by my webpage, which most certainly is 301 (moved permanently), according to curl on the Linux subsystem, but using curl or the WebRequest object on ...
- 2,561
17
votes
3
answers
28k
views
System.Net.ProtocolViolationException: You must write ContentLength bytes to the request stream before calling [Begin]GetResponse
I am getting the
"System.Net.ProtocolViolationException: You must write ContentLength bytes to the request stream before calling [Begin]GetResponse" error when calling to the "BeginGetResponse" ...
- 397
16
votes
3
answers
56k
views
How to set User Agent with System.Net.WebRequest in c#
I'm trying to set User Agent with WebRequest, but unfortunately, I've only found how to do it using HttpWebRequest, so here is my code and I hope you can help me to set the User-Agent using WebRequest....
- 166
16
votes
5
answers
13k
views
Get unique worker/thread/process/request ID in PHP
In multi-threaded environments (like most web platforms) I often include some sort of thread ID to the logs of my apps. This enables me to tell exactly what log entry came from which request/thread, ...
- 14.1k
16
votes
4
answers
32k
views
PowerShell v3 Invoke-WebRequest: Troubles with forms
Since I upgraded to Windows 8 a lot of my PowerShell scripts relying on launching an invisible IE won’t quite work anymore, so I tried switching to the Invoke-WebRequest command. I did a lot of ...
- 167
16
votes
5
answers
11k
views
Sending gzipped data in WebRequest?
I have a large amount of data (~100k) that my C# app is sending to my Apache server with mod_gzip installed. I'm attempting to gzip the data first using System.IO.Compression.GZipStream. PHP receives ...
Charlie
16
votes
4
answers
5k
views
WebRequest fails to download large files (~ 1 GB) properly
I am attempting to download a large file from a public URL. It seemed to work fine at first but 1 / 10 computers seem to timeout. My initial attempt was to use WebClient.DownloadFileAsync but because ...
- 513
15
votes
4
answers
40k
views
Downloading pdf file using WebRequests
I'm trying to download a number of pdf files automagically given a list of urls.
Here's the code I have:
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
...
- 1,408
15
votes
2
answers
63k
views
Using WebClient or WebRequest to login to a website and access data
I'm trying to access restricted data on a website using WebClient/WebRequest. There is no official API in that website, so what I'm trying to do is simply fill the HTML form and post the values to the ...
- 103k
15
votes
2
answers
20k
views
chrome.webRequest.onBeforeRequest.addListener Cannot read property 'onBeforeRequest' of undefined
I'm trying to build my own chrome extension and I'm trying to add an event handler using onBeforeRequest.
My manifest.json:
{
"manifest_version": 2,
"name": "My extension",
"description"...
user936965
14
votes
3
answers
23k
views
Can I send webrequest from specified ip address with .NET Framework?
I have a server with multi ip addresses. Now I need to communicate with several servers with http protocol. Each server only accept the request from a specified ip address of my server. But when using ...
- 315
13
votes
1
answer
33k
views
Getting full response body from System.Net.WebRequest
I'm using System.Net.WebRequest to get info from some API.
When I get an error, the response contains only the basic HttpStatusCode and message, and not the full error returned.
For comparison, ...
- 4,230
12
votes
2
answers
42k
views
C# Getting proxy settings from Internet Explorer
i have a problem in certain company in germany. They use proxy in their network and my program cant communicate with server.
IE works with this settings:
It means:
Automatically detect settings
...
- 1,487
12
votes
2
answers
13k
views
HttpWebRequest or WebRequest - Resume Download ASP.NET
I would like to know if there is a way to know if a server supports resume download functionallity and if supported, how do I send a request to resume?
I was looking for a solution where my ASP.NET ...
- 17.9k
12
votes
4
answers
25k
views
How to send a POST with a JSON in a WebRequest() call using MQL4?
I would like to send a POST from MQL4-script, using a JSON-format to a Node-server.
I've tried the webRequest() standard function in MQL4, based on the following documentation, but it did NOT success....
- 461