Develop Reference

Getting CORS Error when using fetch to get data

I am trying to access the API to get some data however i keep getting this CORS error. I have checked my code for any syntax errors but i can't find any. I have attached a picture of the error and my function which is supposed to get the data.
async function getData(){
const request = await fetch('https://api.igdb.com/v4/games', {
method: 'POST',
headers: {
'Client-ID': 'jglmao8u28qo1p9wltqne325i7xh3u',
'Authorization': 'Bearer 4xau27m6liukizor4z2l8mlb7vbpjk',
}
})
const response = await request.json();
console.log(response);
}

There is a great proxy out there used just for this - bypassing a CORS block. The source code is here: https://github.com/Rob--W/cors-anywhere, and you would use it like this:
https://cors-anywhere.herokuapp.com/https://api.igdb.com/v4/games
basically just adding the CORS-Anywhere URL before your actual image URL.
In your situation, it would be
async function getData(){
const request = await fetch('https://cors-anywhere.herokuapp.com/https://api.igdb.com/v4/games', {
method: 'POST',
headers: {
'Client-ID': 'jglmao8u28qo1p9wltqne325i7xh3u',
'Authorization': 'Bearer 4xau27m6liukizor4z2l8mlb7vbpjk',
}
})
const response = await request.json();
console.log(response);
}
If you get rate limited by that website, try https://circumvent-cors.herokuapp.com/, this is one that I have deployed from the GitHub source code, no modifications and I do not think it should rate limit you.
Cheers, and let me know if this works.

Typescript removes Authorization header from POST and PATCH fetch requests

I've built an API using C# that uses JWT tokens for authorization. On the frontend I store these tokens in local storage and get them, when creating a request. When creating GET or DELETE requests, everything works fine, and using console.log() I can see that fetch options have the Authorization header added. However when using POST or PATCH methods, the Authorization header is missing immediatly after adding it to the object. Here is my request method:
const send = async (apiOptions: ApiParams): Promise<FetchReturn> => {
const accessToken = GetAccessToken()
const options: ApiOptions = {
method: apiOptions.method,
headers: {
Authorization: `Bearer ${accessToken}`
}
}
console.log(options)
if (apiOptions.data) {
options.headers = {
'Content-Type': 'application/json'
}
options.body = JSON.stringify(apiOptions.data)
}
const result = await fetch(`${getUrl()}/${apiOptions.path}`, options).then(res => res).catch(err => err)
if (!result.ok) {
if (IsExpired()) {
const refreshResult = await fetch(`${getUrl()}/api/user/refresh`, {method: 'POST', headers:{
'Content-Type': 'application/json'
}, body: JSON.stringify(GetRefreshRequest())}).then(res => res).catch(err => err)
if (refreshResult.ok) {
Login(JSON.parse(await refreshResult.text()))
return await send(apiOptions)
} else if (refreshResult.status === 401) {
Logout()
window.location.reload()
return { code: 0, text: ""}
}
}
}
const text = await result.text()
return { code: result.status, text: text }
}

I suppose that in apiParams for POST you have property 'data' assigned, and later you have if-condition that completely replaces request headers object.
Change it to:
options.headers['Content-Type'] = 'application/json';
To keep authorization in headers

The first time check your apiOptions.data
i think , its null when you call POST/Patch request
Just put console.log("...") In the if statement , Then try for resolve your Error
If your problem not resolved, put a replay under my post

can't get response status code with JavaScript fetch [duplicate]

This question already has answers here:
Why does my JavaScript code receive a "No 'Access-Control-Allow-Origin' header is present on the requested resource" error, while Postman does not?
(13 answers)
Closed 3 years ago.
I'm trying to create a login form. when I'm testing the service with Postman, I will get a body object with status code and etc.
But, with JavaScript fetch, I can't get body object and I just received an error:
export const login = (username,password) => {
return dispatch=>{
const basicAuth = 'Basic ' + btoa(username + ':' + password);
let myHeaders = new Headers();
myHeaders.append('Authorization', basicAuth);
myHeaders.append('Content-Type', 'application/json');
fetch(`${baseUrl}api/user/login`, {
withCredentials: true,
headers: myHeaders
})
.then(function (response) {
return response.json();
})
.then(function (json) {
dispatch(setLoginInfo(json))
})
.catch(err =>{
console.log(err)
dispatch(loginFailed())
});
}
}
I need to get status code in fetch.

The status code is the status property on the response object. Also, unless you're using JSON with your error responses (which some people do, of course), you need to check the status code (or the ok flag) before calling json:
fetch(`${baseUrl}api/user/login`, {
credentials: "include", // ¹ See note below
headers: myHeaders
})
.then(function(response) {
console.log(response.status); // Will show you the status
if (!response.ok) {
throw new Error("HTTP status " + response.status);
}
return response.json();
})
.then(// ...
Not checking that the request succeeded is such a common mistake I wrote it up on my anemic old blog.
¹ You had withCredentials: true, but the documentation says it's credentials: "include". (Thank you aderchox for pointing that out.)

The status is present in the response object. You can get it inside your first then block
.then(function (response) {
console.log(response.status);
return response.json();
})
Since you are returning response.json(), the subsequent then and catch only gets the result of response.json() which is the body of the response.

Add parameters to post request using js on client side

I'm developing a "TODO" app using node.js and mongodb.
I'm trying to post a new task from the client but I didn't success to pass parameters to the server and from there to the database.
Client code:
<script>
function addData(item, url) {
var text = document.getElementById("myTask").value;
return fetch('/todos',{
method: 'post',
body: text
}).then(response => response.json())
.then(data => console.log(data));
}
</script>
Server code:
app.post('/todos',(req,res) =>{
console.log("\n\n req.body is: \n\n",req.body);
var todo = new Todo({
text: req.body.text});
todo.save().then((doc) =>{
res.send(doc);
console.log(JSON.stringify(doc,undefined,2));
},(err) =>{
res.status(400).send(err); //400 = unable to connect
console.log("Unable to save todo.\n\n\n" , err);
});
});
And the problem is that the client doesn't send the body to the server,
and the body is null on the server side:
See the logs here
(as you can see: req.body = {})
In the js code, I tried to pass the body parameter but I guess I did something wrong so I want to know the best way to pass parameters back to the server (not only the body but text, time and etc)
Thank in advance,
Sagiv

I think that you are missing something. Try to use name of param
body: JSON.stringify({data: text})
OR
read here Fetch: POST json data

I used this code:
(async () => {
const rawResponse = await fetch('https://httpbin.org/post', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({a: 1, b: 'Textual content'})
});
const content = await rawResponse.json();
console.log(content);
})();
and now I succeeded to pass data to the request.
Thanks everybody

Get Token From Api Dynamically To Access Content

I need to have the token to access the content like the announcement in my code. But what i do is to copy the token generated from loginUser() and paste it inside the getAnnouncement() under the fetch. I wrote Authorization : 'Bearer esuigiugeguigiguigi' <--- this is the token. The problem with this is that i need to copy and paste again the token every time it expires.
function loginUser(){
fetch('http://sample_website.com/api/auth/login', {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
email: document.getElementById("email").value,
password: document.getElementById("password").value
})
})
.then(data => data.json() )
.then(data => {
if(data.response){
redirect: window.location.replace("../Sample/Home.html")
} else{
alert("Invalid Email or Password");
}
})
.catch((err) => {
console.error(err);
})
}
function getAnnouncement(){
fetch('http://sample_website.com/api/announcements', {
method: 'GET',
headers: {'Content-Type': 'application/json',
Authorization : 'Bearer esuigiugeguigiguigi'},
})
.then(data => data.json())
.then(data => { console.log(data)
const output = document.getElementById("display");
output.innerHTML = `<ul>
<li><h2>${data.data.data[0].title}</h2></li>
<li>${data.data.data[0].body}</li>
<li>Created: ${data.data.data[0].created_at}</li>
</ul>`;
})
.catch((err) => {
console.error(err);
})
}

Usually the response from an API call to get the token will hold:
the token
the duration of the toke
a link to refresh the token
One basic way of dealing with this is to keep the token data in localStorage or in memory or something (you can decide for yourself), and then just use it on any request that needs authorization.
It is possible that the API in question gives a specific error in case a token has expired. You can then catch it, use the link to refresh the token to get a new one, and repeat the request.
As there is not much info about the API in hand, or what you're doing and what (if any) framework you are using, this it the best answer I can provide at the moment. There are a lot of libraries out there handling this stuff already, so you might want to look into existing solutions as well.