Hello I try to write a HTTP Request in C# (Post), but I need help with an error
Expl: I want to send the Content of a DLC File to the Server and recive the decrypted content.
C# Code
public static void decryptContainer(string dlc_content)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://dcrypt.it/decrypt/paste");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
using (StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.ASCII))
{
writer.Write("content=" + dlc_content);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
Console.WriteLine(reader.ReadToEnd());
}
}
and here I got the html request
<form action="/decrypt/paste" method="post">
<fieldset>
<p class="formrow">
<label for="content">DLC content</label>
<input id="content" name="content" type="text" value="" />
</p>
<p class="buttonrow"><button type="submit">Submit »</button></p>
</fieldset>
</form>
Error Message:
{
"form_errors": {
"__all__": [
"Sorry, an error occurred while processing the container."
]
}
}
Would be very helpfull if someone could help me solving the problem!
HTTP works as a request-response protocol between a client and server. Example: A client (browser) sends an HTTP request to the server; then the server returns a response to the client. The response contains status information about the request and may also contain the requested content.
An HTTP request is made by a client, to a named host, which is located on a server. The aim of the request is to access a resource on the server. To make the request, the client uses components of a URL (Uniform Resource Locator), which includes the information needed to access the resource.
The primary or most-commonly-used HTTP verbs (or methods, as they are properly called) are POST, GET, PUT, PATCH, and DELETE. These correspond to create, read, update, and delete (or CRUD) operations, respectively. There are a number of other verbs, too, but are utilized less frequently.
To make an HTTP call in Ajax, you need to initialize a new XMLHttpRequest() method, specify the URL endpoint and HTTP method (in this case GET). Finally, we use the open() method to tie the HTTP method and URL endpoint together and call the send() method to fire off the request.
You haven't set a content-length, which might cause issues. You could also try writing bytes directly to the stream instead of converting it to ASCII first.. (do it the opposite way to how you're doing it at the moment), eg:
public static void decryptContainer(string dlc_content)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://dcrypt.it/decrypt/paste");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
byte[] _byteVersion = Encoding.ASCII.GetBytes(string.Concat("content=", dlc_content));
request.ContentLength = _byteVersion.Length
Stream stream = request.GetRequestStream();
stream.Write(_byteVersion, 0, _byteVersion.Length);
stream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
Console.WriteLine(reader.ReadToEnd());
}
}
I've personally found posting like this to be a bit "fidgity" in the past. You could also try setting the ProtocolVersion on the request.
I would simplify your code, like this:
public static void decryptContainer(string dlc_content)
{
using (var client = new WebClient())
{
var values = new NameValueCollection
{
{ "content", dlc_content }
};
client.Headers[HttpRequestHeader.Accept] = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
string url = "http://dcrypt.it/decrypt/paste";
byte[] result = client.UploadValues(url, values);
Console.WriteLine(Encoding.UTF8.GetString(result));
}
}
It also ensures that the request parameters are properly encoded.
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