public static Task <HttpResponseMessage> SendFormAsync(
this HttpClient client,
IHtmlFormElement form,
IHtmlElement submitButton,
IEnumerable <KeyValuePair <string, string> > formValues)
{
if (client is null)
{
throw new ArgumentNullException(nameof(client));
}
if (form is null)
{
throw new ArgumentNullException(nameof(form));
}
if (submitButton is null)
{
throw new ArgumentNullException(nameof(submitButton));
}
if (formValues is null)
{
throw new ArgumentNullException(nameof(formValues));
}
foreach (var kvp in formValues)
{
var element = form[kvp.Key];
switch (element)
{
case IHtmlInputElement input:
input.Value = kvp.Value;
break;
case IHtmlSelectElement select:
select.Value = kvp.Value;
break;
}
}
Assert.True(form.CheckValidity(), "Form contains invalid data");
var submit = form.GetSubmission(submitButton);
var target = (Uri)submit.Target;
if (submitButton.HasAttribute("formaction"))
{
var formaction = submitButton.GetAttribute("formaction");
target = new Uri(formaction, UriKind.Relative);
}
#pragma warning disable CA2000 // Dispose objects before losing scope
var submision = new HttpRequestMessage(new HttpMethod(submit.Method.ToString()), target)
{
Content = new StreamContent(submit.Body)
};
#pragma warning restore CA2000 // Dispose objects before losing scope
foreach (var header in submit.Headers)
{
submision.Headers.TryAddWithoutValidation(header.Key, header.Value);
submision.Content.Headers.TryAddWithoutValidation(header.Key, header.Value);
}
return(client.SendAsync(submision));
}