public static Task <HttpResponseMessage> SendAsync(
this HttpClient client,
IHtmlFormElement form,
IEnumerable <KeyValuePair <string, string> > formValues)
{
foreach (var kvp in formValues)
{
var element = Assert.IsAssignableFrom <IHtmlInputElement>(form[kvp.Key]);
element.Value = kvp.Value;
}
var submitElement = Assert.Single(form.QuerySelectorAll("[type=submit]"));
var submitButton = Assert.IsAssignableFrom <IHtmlElement>(submitElement);
var submit = form.GetSubmission(submitButton);
var submision = new HttpRequestMessage(new HttpMethod(submit.Method.ToString()), submit.Target)
{
Content = new StreamContent(submit.Body)
};
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));
}
public static Task <HttpResponseMessage> SendAsync(
this HttpClient client,
IHtmlFormElement form,
IHtmlElement submitButton,
IEnumerable <KeyValuePair <string, string> > formValues)
{
foreach (var kvp in formValues)
{
var element = Assert.IsAssignableFrom <IHtmlInputElement>(form[kvp.Key]);
element.Value = kvp.Value;
}
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);
}
var submision = new HttpRequestMessage(new HttpMethod(submit.Method.ToString()), target)
{
Content = new StreamContent(submit.Body)
};
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));
}
/// <summary>
/// Submits a HTML form to the server
/// </summary>
/// <param name="client">HTTP client to use for submitting the form.</param>
/// <param name="form">HTML Form to submit.</param>
/// <param name="submitButton">Submit button to use for submitting the form.</param>
/// <returns>Returns the HTTP response received after submitting the form.</returns>
public static Task <HttpResponseMessage> SubmitFormAsync(this HttpClient client, IHtmlFormElement form, IHtmlElement submitButton)
{
if (form == null)
{
throw new ArgumentNullException(nameof(form));
}
if (submitButton == null)
{
throw new ArgumentNullException(nameof(submitButton));
}
var formSubmission = form.GetSubmission(submitButton);
var targetUri = (Uri)formSubmission.Target;
if (submitButton.HasAttribute("formaction"))
{
var formAction = submitButton.GetAttribute("formaction");
targetUri = new Uri(formAction, UriKind.Relative);
}
var submitFormRequest = new HttpRequestMessage(new HttpMethod(formSubmission.Method.ToString()), targetUri)
{
Content = new StreamContent(formSubmission.Body)
};
foreach (var header in formSubmission.Headers)
{
submitFormRequest.Headers.TryAddWithoutValidation(header.Key, header.Value);
submitFormRequest.Content.Headers.TryAddWithoutValidation(header.Key, header.Value);
}
return(client.SendAsync(submitFormRequest));
}
private static string GetAntiForgeryTokenFromForm(IHtmlFormElement form)
{
using (var reader = new StreamReader(form.GetSubmission().Body))
{
var submitBody = reader.ReadToEnd();
var tokenMatch = TOKEN_REGEX.Match(submitBody);
var token = tokenMatch.Success ? tokenMatch.Groups[1].Captures[0].Value : null;
return(token);
}
}
public static Task <HttpResponseMessage> SendAsync(
this HttpClient client,
IHtmlFormElement form,
IHtmlElement submitButton,
IEnumerable <KeyValuePair <string, string> > formValues)
{
foreach (var kvp in formValues)
{
switch (form[kvp.Key])
{
case IHtmlInputElement input:
input.Value = kvp.Value;
if (bool.TryParse(kvp.Value, out var isChecked))
{
input.IsChecked = isChecked;
}
break;
case IHtmlSelectElement select:
select.Value = kvp.Value;
break;
default:
throw new Exception($"Unknown form element: '{kvp.Key}'");
}
}
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);
}
var submision = new HttpRequestMessage(new HttpMethod(submit.Method.ToString()), target)
{
Content = new StreamContent(submit.Body)
};
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));
}
public static Task <HttpResponseMessage> SendAsync(
this HttpClient client,
IHtmlFormElement form,
IHtmlElement submitButton,
IEnumerable <KeyValuePair <string, string> > formValues)
{
foreach (var formValue in formValues)
{
if (form[formValue.Key] is IHtmlInputElement elementAsInput)
{
elementAsInput.Value = formValue.Value;
}
else if (form[formValue.Key] is IHtmlSelectElement)
{
var matchingSelect = form.QuerySelectorAll("select")
.OfType <IHtmlSelectElement>()
.FirstOrDefault(s => s.Children.OfType <IHtmlOptionElement>().Any(o => o.Value == formValue.Value));
if (matchingSelect != null)
{
matchingSelect.Value = formValue.Value;
}
}
}
var documentRequest = form.GetSubmission(submitButton);
var requestUri = submitButton.HasAttribute("formaction") ?
new Uri(submitButton.GetAttribute("formaction"), UriKind.Relative) :
documentRequest.Target;
var request = new HttpRequestMessage(new HttpMethod(documentRequest.Method.ToString()), requestUri)
{
Content = new StreamContent(documentRequest.Body)
};
foreach (var header in documentRequest.Headers)
{
request.Headers.TryAddWithoutValidation(header.Key, header.Value);
request.Content.Headers.TryAddWithoutValidation(header.Key, header.Value);
}
return(client.SendAsync(request));
}
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));
}