Dynamics Community Forum Thread Details

Content-Type in the WebRequest cannot be changed.

Hello dear community,

I am currently in the process of programming a WebRequest from AX2012.
The requirement is that I pass the Content-Type as "application/json;charset=UTF-8.
Unfortunately it seems that AX ignores the .set_ContentType.

We wrote a small test service, which as an answer shows me what the original request was.

Here are some code examples.

private void requestService()
{
    System.String                   response = "";
    System.Net.HttpWebRequest       httpRequest  = null;
    System.Net.HttpWebResponse      httpResponse = null;
    System.Net.WebHeaderCollection  httpHeader = null;
    CLRObject                       clro         = null;
    System.IO.Stream                stream       = null;
    System.IO.StreamReader          streamReader = null;
    System.Byte[]                   bytes        = null;
    System.Byte[]                   byteArray    = null;
    System.Text.Encoding            encoding     = null;
    boolean                         ret          = true;
    str                             byteStr;
    byteStr                         = strfmt("%1:%2", rampParameter.Username, rampParameter.Password);

    try
    {
        new InteropPermission(InteropKind::ClrInterop).assert();
        httpHeader  = new System.Net.WebHeaderCollection();
        clro        = System.Net.WebRequest::Create(this.getRequestUrl());
        httpRequest = clro;     
        
        httpRequest.set_Method("POST");
        
        httpRequest.set_ContentType(@"application/json;charset=UTF-8");
                     
        
        encoding    = System.Text.Encoding::get_UTF8();
        byteArray   = encoding.GetBytes(byteStr);
        byteStr     = System.Convert::ToBase64String(byteArray);
        httpHeader.Add("Authorization", 'Basic '   byteStr);
        
        httpRequest.set_Headers(httpHeader);
        bytes       = encoding.GetBytes(this.buildJsonString());
        httpRequest.set_ContentLength(bytes.get_Length());
        stream      = httpRequest.GetRequestStream();
        stream.Write(bytes,0,bytes.get_Length());
        stream.Close();


        httpResponse = httpRequest.GetResponse();
        stream = httpResponse.GetResponseStream();
        streamReader = new System.IO.StreamReader(stream);
        response = streamReader.ReadToEnd();
        CodeAccessPermission::revertAssert();
    }
    catch(Exception::CLRError)
    {
        ret = false;
        throw error(AifUtil::getClrErrorMessage());
    }
}

In the example, in line 26, I set the ContentType via the request method.
But that doesn't seem to work.
As a result I get the response:

{"Headers":{"Authorization":["Basic XXXX","Connection":["Keep-Alive","Content-Length":["65","Expect":["100-continue ","Host":["iis2016-01:4747"},"Query":{"value":"","hasValue":false},"RouteValues":{"action":"Post", "controller":"Values"},"Body":"{\"gate\":\"10\",\"direction\":\"UNLOAD\",\"start\":\"2022-09 -08T12:14:14Z\"}"}

We tested the service that we programmed, if we send a request via Postman, we get the corresponding content type back.

We then tried, instead of

httpRequest.set_ContentType(@"application/json;charset=UTF-8");

to use the following code and put the type directly in the header:

httpHeader.Add("content-type",@"application/json;charset=UTF-8");

But then we get the following Infolog error message:

"The 'content-type' header must be modified with the appropriate property or method.

Parameter name: name"

Do any of you see the error in the code? We're currently a bit clueless.
Or is that perhaps a mistake by AX?

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