koheikawata's Blog: HttpRequest and HttpRequestMessage for Azure Functions

I was working on Microsoft Learn, "Share your location as a text message using Azure Functions and Twilio", and faced a problem on HttpRequest class for Azure Functions. Usually Azure Functions takes HttpRequest class for extracting request. However, the tutorial described HttpRequestMessage. I was really confused because HttpRequestMessage works partly, but it does not support Body property.

For example, this includes HttpRequestMessage but does not support req.Body.

```
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using ImHere.Data;
using Twilio.Rest.Api.V2010.Account;
using Twilio.Types;
using System.Net.Http;

namespace ImHere.Functions
{
    public static class SendLocation
    {
        [FunctionName("SendLocation")]
        public static async Task<iactionresult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)]HttpRequestMessage req,
            [TwilioSms(AccountSidSetting = "TwilioAccountSid", AuthTokenSetting = "TwilioAuthToken", From = "+81xxxxxxxxx")] ICollector<createmessageoptions> messages,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");
            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
            PostData data = JsonConvert.DeserializeObject<postdata>(requestBody);
            string url = $"https://www.google.com/maps/search/?api=1&query={data.Latitude},{data.Longitude}";
            log.LogInformation($"URL created - {url}");

foreach (string toNo in data.ToNumbers)
            {
                PhoneNumber number = new PhoneNumber(toNo);
                CreateMessageOptions message = new CreateMessageOptions(number)
                {
                    Body = $"I'm here! {url}"
                };
                log.LogInformation($"Creating SMS message to {message.To}, message is '{message.Body}'.");
                messages.Add(message);
            }

return new OkResult();

}
    }
}

```

The below works without error.

namespace ImHere.Functions
{
    public static class SendLocation
    {
        [FunctionName("SendLocation")]
        public static async Task<iactionresult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)]HttpRequest req,
            [TwilioSms(AccountSidSetting = "TwilioAccountSid", AuthTokenSetting = "TwilioAuthToken", From = "+81xxxxxxxxx")] ICollector<createmessageoptions> messages,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");
            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
            PostData data = JsonConvert.DeserializeObject<postdata>(requestBody);
            string url = $"https://www.google.com/maps/search/?api=1&query={data.Latitude},{data.Longitude}";
            log.LogInformation($"URL created - {url}");

return new OkResult();

}
    }
}
```

The difference is HttpRequest and HttpRequestMessage. It looks there are some classes and makes me confused.

1) System.Net.Http.HttpRequestMessage
2) Windows.Web.Http.HttpRequestMessage
3) Microsoft.AspNetCore.Http.HttpRequest
4) System.Web.HttpRequest

We usually use 3) for Azure Functions.

Tuesday, December 25, 2018

HttpRequest and HttpRequestMessage for Azure Functions