I have the following code for my handler I've debugged it and I can see that my image variable b has the actual image I need however I am not able to display it in my browser. When I run this I just get System.Drawing.Bitmap on the screen instead of the image. I am not sure how to write it to the browser. Any ideas would be much appreciated it thanks.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://myaddress");
request.Credentials = new NetworkCredential("username", "password");
request.Method = "GET";
request.Accept = "image/jpeg";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream s = response.GetResponseStream();
System.Drawing.Image b = System.Drawing.Image.FromStream(s);
context.Response.ContentType = "image/jpeg";
context.Response.Write(b);
Write it to the output stream:
b.Save(context.Response.OutputStream, ImageFormat.Jpeg);
Related
I would like to add a picture to a PictureBox via the .Load() Method. The Problem with that picture is that it stays on a website which requires authentication!
Link is like: https://intranet.company.com/_layouts/15/company/PortraitHandler.ashx?isinternal=true&account=test/account
How can I fix this?
Solved it like this:
public Bitmap getImageFromURL(string sURL)
{
HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(sURL);
Request.Method = "GET";
Request.UseDefaultCredentials = true;
HttpWebResponse Response = (HttpWebResponse)Request.GetResponse();
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(Response.GetResponseStream());
Response.Close();
return bmp;
}
I have a Request which I make to a page and works fine. I can also view that page the response page with Fiddler.
But how do I open this response in my browser?
Currently what I have:
Cookie cookie = new Cookie("test","this");
cookie.Domain = "foobar";
HttpWebRequest request = (HttpWebRequest) HttpWebRequest.Create("http://foobar/ReportServer/");
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookie);
WebResponse response = request.GetResponse();
Stream sr = response.GetResponseStream();
StreamReader sre = new StreamReader(sr);
string s = sre.ReadToEnd();
Response.Write(s);
Save it to an HTML file and open the browser with the path to that file.
Because you have addressibility to the request "Stream" you can use this method: NavigateToStream :
http://msdn.microsoft.com/en-us/library/system.windows.controls.webbrowser.navigatetostream(v=vs.100).aspx
this.webBrowser.NavigateToStream(sr);
You can use System.Windows.Forms.WebBrowser control.
In C#, is it possible to detect if the web address of a file is an image, or a video? Is there such a header value for this?
I have the following code that gets the filesize of a web file:
System.Net.WebRequest req = System.Net.HttpWebRequest.Create("http://test.png");
req.Method = "HEAD";
using (System.Net.WebResponse resp = req.GetResponse())
{
int ContentLength;
if(int.TryParse(resp.Headers.Get("Content-Length"), out ContentLength))
{
//Do something useful with ContentLength here
}
}
Can this code be modified to see if a file is an image or a video?
Thanks in advance
What you're looking for is the "Content-Type" header
string uri = "http://assets3.parliament.uk/iv/main-large//ImageVault/Images/id_7382/scope_0/ImageVaultHandler.aspx.jpg";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "HEAD";
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
var contentType = response.Headers["Content-Type"];
Console.WriteLine(contentType);
}
You can check resp.Headers.Get("Content-Type") in response header.
For example, it will be image/jpeg for jpg file.
See list of available content types.
what im trying to do is to make photo upload to imgur site using their API here http://api.imgur.com/endpoints/image#image-upload. As i read in documentation, image data has to be in "image" parameter. So what im doing is setting POST request data as "image=base64codedfile&title=blabla&type=base64" and it does upload it but file is corrupted. If my request will contain only "base64codedfile" without image, title, type name parameters its working like a charm. Am i doing something wrong?
If i set it as:
string postData = "image="+Convert.ToBase64String(image)+"&type=base64&title=test;
image is corrupted
If it's only raw data:
string postData = Convert.ToBase64String(image);
It's working
Whole code is something like this:
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.imgur.com/3/upload.xml");
request.Headers.Add("Authorization", "Client-ID >>myclientid<<");
request.Method = "POST";
string filePath = "d:\\test.jpg";
FileStream file = new FileStream(filePath, FileMode.Open);
byte[] image = new byte[file.Length];
file.Read(image, 0, (int)file.Length);
ASCIIEncoding enc = new ASCIIEncoding();
string postData = Convert.ToBase64String(image);
byte[] bytes = enc.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = bytes.Length;
Stream writer = request.GetRequestStream();
writer.Write(bytes, 0, bytes.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
I am also trying to do the same and also facing the problem...
I got one solution...
After uploading your image get the id of the image using response.getresponsestream()....
then using this id update that image..and dont forget to use imgur api to update image..to know more about updating imgur image visit this link.
My solution :
using (var reader = new StreamReader(response.GetResponseStream()))
{
var objText = reader.ReadToEnd();
}
in object text you will found the json response
I fetch webpages in order to feed data to my application. However, the pages contain a lot of images which I don't require at all. I only need the text data.
My problem is that the web requests take an unacceptable amount of time. I think the images also are fetch during a web request. Is there any way to eliminate the images and download only the text data?
The following is the code that I am using currently.
var httpWebRequest = HttpWebRequest.Create(url) as HttpWebRequest;
httpWebRequest.Method = "GET";
httpWebRequest.ProtocolVersion = HttpVersion.Version11;
httpWebRequest.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate");
httpWebRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
httpWebRequest.Proxy = null;
httpWebRequest.KeepAlive = true;
httpWebRequest.Accept = "text/html";
string responseString = null;
var httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse;
using (var responseStream = httpWebResponse.GetResponseStream())
{
using (var streamReader = new StreamReader(responseStream))
{
responseString = streamReader.ReadToEnd();
}
}
Also, any other optimization suggestions are most welcome.
That is incorrect.
HttpWebRequest does not know anything about HTML or images; it just sends raw HTTP requests.
You can use Fiddler to see exactly what's going on.