Error in Webservices Json C# "Unexpected Character encountered while Parsing value: <. Path '', line 0, position 0."

Question

Hello, I’m getting an error in the execution of my code, in another application the same code works, I’ve changed the using, but it doesn’t work.

public String CriaPeca(String token, String ip, String autor, bool seguranca, Dictionary<String, String> metadadosDoc, String nomeArquivo)
{
    // Variáveis para retorno do webservice e do método
    //var WSResult = "";
    var id = "";

    // Configuração dos parametros de entrada
    var URL_Base = "";

    // Caso exista necessidade de segurança deve ser usado HTTPS
    if (seguranca)
        URL_Base = "https://";
    else URL_Base = "http://";

    URL_Base = URL_Base + ip + "/docflow/";

    var URL_Servico = "ws/peca/cadastro?auth=" + token;

    // Criando metadados gerais para o documento
    var metadados = "login_autor=" + autor;

    // Montando metadados especificos do documento
    var metTemp = metadadosDoc;
    // Concatenando metadados gerais com especificos
    metadados = metadados + "&" + metTemp;

    try
    {
        var client = new RestClient(URL_Base);
        // Neste ploco fazemos o cadastro da Peça
        var request = new RestRequest(URL_Servico, Method.POST);


        request.AddQueryParameter("response_type", "json");
        request.AddParameter("user_login", "admin");
        request.AddFile("bin_peca", nomeArquivo);
        request.AddHeader("Content-type", "application/json");

        foreach (String campo in metadadosDoc.Keys)
        {
            String metadadoslimpo = removerAcentos(metadadosDoc[campo]);
            request.AddParameter(campo, metadadoslimpo);
        }

        var response = client.Execute(request);


        Console.Out.WriteLine(response.Content);


            //Erro // Erro // Erro
        JObject ResultJObject = JObject.Parse(response.Content);

        var status = ResultJObject["message"]["type"].Value<string>();
        if (status.Equals("error"))
        {
            status = ResultJObject["message"]["value"].Value<string>();
        }
        id = status;

    }
    catch (Exception ex)
    {
        id = Convert.ToString(ex);
        Console.WriteLine("--> Nao foi possivel criar o documento via WebService <--\nErro: " + ex.ToString());
    }

    return id;
}

The error message is this.

Unexpected Character encountered while Parsing value: <. Path '', line 0, position 0.

Sponse. Content is thus

Answer 1

Webservice returned an HTML page specifying an error. Notice the tag title in Response.Content

Jboss Web/7.0.10.Final - Error Report

The code tries to treat the return as a JSON, but it is an HTML, this is the cause of the error.