I am building up a PWA application where I need to call a API built with asp core. When I tried to call a POST through the JavaScript fetch function I am getting the following error: Failed to load resource: the server responded with a status of 400 ()
I tested this API through the Postman and it is working fine. I tried fetch of GET method and it is working fine.
subscription model:
public class Subscription
{
public string endpoint { set; get; }
public DateTime ? expirationTime { set; get; }
public Key keys { set; get; }
}
keys model:
public class Key
{
public string p256dh { set; get; }
public string auth { set; get; }
}
post api controller:
[Route("api/[controller]")]
[ApiController]
public class PushNotificationController : ControllerBase
{
[HttpPost]
public void Post([FromBody] Subscription sub )
{
Console.WriteLine(sub);
}
}
fetch call
async function send() {
await
fetch('https://localhost:44385/api/PushNotification', {
mode: 'no-cors',
method: 'POST',
body: { "endpoint": "123", "expirationTime": null, "keys": { "p256dh": "ttdd", "auth": "dssd" } },
headers: {
'content-type': 'application/json'
}
}).catch(function (erro) {
console.log("Error unicateing to server");
});
}
send();
Any idea?
Updated:
I tried the below code with JSON.stringify(data) but still getting the same error.
const data = {
endpoint: "123",
expirationTime: null,
keys: {
p256dh: "p256dh test",
auth: "auth test"
}
};
await
fetch('https://localhost:44385/api/PushNotification', {
method: 'POST',
mode: 'no-cors',
cache: 'no-cache',
credentials: 'same-origin' ,
headers: {
'content-type': 'application/json'
},
body: JSON.stringify(data)
}).catch(function (erro) {
console.log(erro);
});
I am building up a PWA application where I need to call a API built with asp core. When I tried to call a POST through the JavaScript fetch function I am getting the following error: Failed to load resource: the server responded with a status of 400 ()
I tested this API through the Postman and it is working fine. I tried fetch of GET method and it is working fine.
subscription model:
public class Subscription
{
public string endpoint { set; get; }
public DateTime ? expirationTime { set; get; }
public Key keys { set; get; }
}
keys model:
public class Key
{
public string p256dh { set; get; }
public string auth { set; get; }
}
post api controller:
[Route("api/[controller]")]
[ApiController]
public class PushNotificationController : ControllerBase
{
[HttpPost]
public void Post([FromBody] Subscription sub )
{
Console.WriteLine(sub);
}
}
fetch call
async function send() {
await
fetch('https://localhost:44385/api/PushNotification', {
mode: 'no-cors',
method: 'POST',
body: { "endpoint": "123", "expirationTime": null, "keys": { "p256dh": "ttdd", "auth": "dssd" } },
headers: {
'content-type': 'application/json'
}
}).catch(function (erro) {
console.log("Error unicateing to server");
});
}
send();
Any idea?
Updated:
I tried the below code with JSON.stringify(data) but still getting the same error.
const data = {
endpoint: "123",
expirationTime: null,
keys: {
p256dh: "p256dh test",
auth: "auth test"
}
};
await
fetch('https://localhost:44385/api/PushNotification', {
method: 'POST',
mode: 'no-cors',
cache: 'no-cache',
credentials: 'same-origin' ,
headers: {
'content-type': 'application/json'
},
body: JSON.stringify(data)
}).catch(function (erro) {
console.log(erro);
});
-
1
Body should not be object but stringified
JSON. – m1k1o Commented Jun 3, 2019 at 23:33
2 Answers
Reset to default 3It turns out that the problem is with the cors mode. Either remove it or set it to 'cors'.
await fetch('https://localhost:44385/api/PushNotification', {
method: 'POST',
mode: 'cors',
cache: 'no-cache',
credentials: 'same-origin' ,
headers: {
'content-type': 'application/json'
},
body: JSON.stringify(data)
}).catch(function (erro) {
console.log(erro);
});
Using object:
fetch('https://localhost/', {
method: 'POST',
body: {
foo: "bar"
}
})
In this case body will likely be: [object Object].
But converting object to JSON:
fetch('https://localhost/', {
method: 'POST',
body: JSON.stringify({
foo: "bar"
})
})
Body will be {"foo":"bar"}
https://developer.mozilla/en-US/docs/Web/API/Fetch_API/Using_Fetch#Supplying_request_options