I'm trying to make a post request using HttpClient. The expected json which I'm trying to post is stored in var result and looks like :
{
"ID": 142,
"StationNo": 19,
"RunTime": 1800,
"ControllerID": 4,
"ControllerAddress": 2,
"ProgramNo": 5,
"ModeID": "AutoProgram",
"EventDate": "2022-04-27T22:30:02",
"Description": "Irrigation Completed",
"MessageCode": 5,
"time": "2022-05-06T08:58:41.322Z",
"source": {
"id": "43432088"
},
"type": "c8y_Golf_Controller",
"text": "PilotCC Data New Msg"
}
The foreach loop runs for 4 iterations but no successful request is made. It just returns nothing in response. I've tested the above json in postman and it works fine there.
Here's my sample code :
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.Net.Http.Headers;
using System.Net.Http;
using System.Text;
using System.Net.Mime;
using System.Net.Http.Json;
namespace ObjFromJson
{
public class Program
{
static async Task Main(string[] args)
{
string json = @"{
'Values': [
{
'MsgSource': null,
'TagName': 'Data.New_MSG',
'RawValue': '[\r\n {\r\n \'ID\': 145,\r\n \'StationNo\': 6,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 2,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T23:30:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 144,\r\n \'StationNo\': 18,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 5,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:00:00\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 143,\r\n \'StationNo\': 15,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 4,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:00:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 142,\r\n \'StationNo\': 19,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 5,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:30:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n }\r\n]',
'ScaledValue': '[\r\n {\r\n \'ID\': 145,\r\n \'StationNo\': 6,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 2,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T23:30:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 144,\r\n \'StationNo\': 18,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 5,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:00:00\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 143,\r\n \'StationNo\': 15,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 4,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:00:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n },\r\n {\r\n \'ID\': 142,\r\n \'StationNo\': 19,\r\n \'RunTime\': 1800,\r\n \'ControllerID\': 4,\r\n \'ControllerAddress\': 2,\r\n \'ProgramNo\': 5,\r\n \'ModeID\': \'AutoProgram\',\r\n \'EventDate\': \'2022-04-27T22:30:02\',\r\n \'Description\': \'Irrigation Completed\',\r\n \'MessageCode\': 5\r\n }\r\n]',
'Status': 'Normal',
'ComStatus': null,
'TimeStamp': '2022-04-28 13:17:39.851'
}
]
}";
Root root = JsonConvert.DeserializeObject<Root>(json);
string rawValue = root.Values[0].RawValue;
JArray array = JArray.Parse(rawValue);
string isoTime = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ss.fffZ");
string json2 = $"{{\"time\": \"{isoTime}\",\"source\": {{\"id\": \"43432088\" }},\"type\": \"c8y_Golf_Controller\",\"text\": \"PilotCC Data New Msg\"}}";
JObject json3 = JObject.Parse(json2);
var result = new JObject();
foreach(var item in array)
{
result.Merge(item);
result.Merge(json3);
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic","base64authvalue");
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/vnd.com.nsn.cumulocity.event json"));
JsonContent myContent = JsonContent.Create(result);
HttpResponseMessage response = await client.PostAsync("https://myurl.com", myContent);
var responseString = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseString);
}
}
}
public class Root
{
public List<Value> Values {get; set;}
}
public class Value
{
public string RawValue { get; set; }
}
}
}
EDIT : Added Console.Write((int)response.StatusCode); just before
Console.WriteLine(responseString); and it's returning Error code: 415
There are few important things to consider while making the request :
- The Content-Type must be "application/json"
- It must have Accept header with value as "application/vnd.com.nsn.cumulocity.event json"
- Basic auth must be used
I'm handeling all these things and the JSON which is in var result is also in correct format (tested in postman) then what else am I missing here?
CodePudding user response：
Can you please try commenting MediaTypeWithQualityHeaderValue and check.
CodePudding user response：
With a little more research, after spending entire day to make this work I was finally able to get it done.
As for this particular problem which I has raised here, it's because the Content-Type becomes application/json; charset=utf-8 which can raise unsupported media type error.
I added string json4 = JsonConvert.SerializeObject(result); after result.Merge(json3); line in foreach loop and replaced the line JsonContent myContent = JsonContent.Create(result); with var stringContent = new StringContent(json4, Encoding.UTF8, MediaTypeNames.Application.Json); stringContent.Headers.ContentType.CharSet = "";
This removes the charset from your Content-Type header.