我正在使用 Visual Studio 在 c# 中使用 dialogflow ( api.ai ) 和 webhook 创建一个机器人。
我必须为所有请求订阅的用户创建广播消息选项。
当用户调用意图订阅时,我调用操作:subscribe.about 我保存 psid 的位置。
下面的代码:
public ApiAiResponse Post([FromBody]JObject jsonRequest)
{
using (WebhookReceiverModelDataContext ctx = new
WebhookReceiverModelDataContext())
{
ApiAiRequest request = jsonRequest.ToObject<ApiAiRequest>();
ApiAiResponse response = new ApiAiResponse();
JObject jObject =
JObject.Parse(request.result.parameters.ToString());
if ("subscribe.about".Equals(request.result.action.ToLower()))
{
using (WebhookReceiverModelDataContext cts = new
WebhookReceiverModelDataContext())
{
string messageabout = request.result.resolvedQuery != null ? request.result.resolvedQuery : "";
speechLang = "You are subscribed";
source = "Broadcast";
}
}
我必须创建一个模块,以便在活动上线时向所有这些用户发送广播消息。
我在表中存储了以下数据:ID、事件名称、事件日期
时间: 事件日期 = 现在=> 我必须向所有订阅的用户发送消息。
我开始使用主动消息,但似乎它们是使用 botframework 创建的。我只想使用 webhook 。
我创建了一个控制器来在 facebook 中发送消息,但似乎不行:当我调用这个控制器时,我收到了这条消息:
<Error>
<Message>An error has occurred.</Message>
</Error>
namespace WebhookReceiver.Controllers
{
public class WebhookController : ApiController
{
string pageToken = "xxxxxxx";
string appSecret = "yyyyy";
public HttpResponseMessage Get()
{
var querystrings = Request.GetQueryNameValuePairs().ToDictionary(x
=> x.Key, x => x.Value);
if (querystrings["hub.verify_token"] == "zzzzz")
{
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(querystrings["hub.challenge"],
Encoding.UTF8, "text/plain")
};
}
return new HttpResponseMessage(HttpStatusCode.Unauthorized);
}
[HttpPost]
public async Task<HttpResponseMessage> Post()
{
var signature = Request.Headers.GetValues("X-Hub-
Signature").FirstOrDefault().Replace("sha1=", "");
var body = await Request.Content.ReadAsStringAsync();
if (!VerifySignature(signature, body))
return new HttpResponseMessage(HttpStatusCode.BadRequest);
var value = JsonConvert.DeserializeObject<WebhookModel>(body);
if (value._object != "page")
return new HttpResponseMessage(HttpStatusCode.OK);
foreach (var item in value.entry[0].messaging)
{
if (item.message == null && item.postback == null)
continue;
else
await SendMessage(GetMessageTemplate(item.message.text,
item.sender.id));
}
return new HttpResponseMessage(HttpStatusCode.OK);
}
private bool VerifySignature(string signature, string body)
{
var hashString = new StringBuilder();
using (var crypto = new HMACSHA1(Encoding.UTF8.GetBytes(appSecret)))
{
var hash = crypto.ComputeHash(Encoding.UTF8.GetBytes(body));
foreach (var item in hash)
hashString.Append(item.ToString("X2"));
}
return hashString.ToString().ToLower() == signature.ToLower();
}
/// <summary>
/// get text message template
/// </summary>
/// <param name="text">text</param>
/// <param name="sender">sender id</param>
/// <returns>json</returns>
private JObject GetMessageTemplate(string text, string sender)
{
return JObject.FromObject(new
{
recipient = new { id = sender },
message = new { text = text }
});
}
/// <summary>
/// send message
/// </summary>
/// <param name="json">json</param>
private async Task SendMessage(JObject json)
{
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(new
MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage res = await
client.PostAsync($"https://graph.facebook.com/v2.6/me/messages?
access_token={pageToken}", new StringContent(json.ToString(),
Encoding.UTF8,
"application/json"));
}
}
}
}
请问我该如何创建这个模块。我需要一些建议。使用邮递员我已经测试使用 Facebook 的 API 调用通过机器人发送消息。我是 C# 新手,所以请帮助我:(