Here is my React code for the form submission:
const handleSubmit = (e) => {
e.preventDefault();
console.log('item:', item);
Axios.post('http://<MY_SERVER>/item/add', {name:item})
.then(response => console.log(response))
.catch(err => console.log(err));
};
and this is the code in my Node API:
// Add a new Item
app.post('/item/add', (req, res) => {
const newItem = new Item({
name: req.body.name
});
newItem.save()
.then(item => {
res.json({msg: 'success'});
})
.catch(err => console.log(err));
});
When I run the handleSubmit nothing happens. I only get the console.logs... Also, here is the error from my server
'ValidationError: item validation failed: name: Path' `name` is required
So it is clear that the data sent over to the api is never received. I've tried changing it up in many ways I have came across online but no luck.
I have attached both ways to post data i.e. Form URL Encoded and JSON. For sending Form Url Encoded data we need an additional Library querystring.
You can install it using npm install query-string
Here is the code for both the requests. You don't need query-string if you are using content type application/json.
Here you go
var axios = require('axios');
const qs = require('querystring');
function sendFormUrlEncodedData() {
const headers = {
'Content-Type': 'application/x-www-form-urlencoded'
};
const payload = {
name: 'morpheus',
job: 'leader'
};
//Send data with form url using querystring node package for it.
axios
.post('https://reqres.in/api/users', qs.stringify(payload), {
headers: headers
})
.then(res => {
console.log(res.data);
})
.catch(err => {
console.log(err);
});
}
function sendJSONData() {
const headers = {
'Content-Type': 'application/json'
};
const payload = {
name: 'morpheus',
job: 'leader'
};
//Send data with JSON, so stringifying it.
axios
.post('https://reqres.in/api/users', JSON.stringify(payload), {
headers: headers
})
.then(res => {
console.log(res.data);
})
.catch(err => {
console.log(err);
});
}
sendFormUrlEncodedData();
sendJSONData();
First of all check whether your backend code is working or not by using postman. I think you are getting validation error because of the error of your backend code. And also check whether that you are implemented the name attribute correctly with its data type.
After that update, the react code as below.
import axios from 'axios';
constructor() {
this.item = {
name: ''
}
}
handleSubmit(event) {
console.log('item:', this.item.name);
event.preventDefault();
axios.post('http://<MY_SERVER>/item/add', this.item)
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
}
Related
I am using node-fetch to fetch data from REST API.
Here is my code:
this.getUserList = async (req, res) => {
const fetch = require('node-fetch');
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
let params = {
"list_info": {
"row_count": 100
}
}
fetch('https://server/api/v3/users?input_data=' + JSON.stringify(params), {
headers:{
"TECHNICIAN_KEY": "sdfdsfsdfsd4343323242324",
'Content-Type': 'application/json',
},
"method":"GET"
})
.then(res => res.json())
.then(json => res.send(json))
.catch(err => console.log(err));
}
It works fine.
However, if I change the following statement:
let params = {"list_info":{"row_count": 100}}
To
let params = {"list_info":{"row_count": 100}, "fields_required": ["id"]}
It prompts the following error message:
FetchError: invalid json response body at https://server/api/v3/users?input_data=%7B%22list_info%22:%7B%22row_count%22:100%7D,%22fields_required%22:[%22id%22]%7D reason: Unexpected end of JSON input`
The problem is that you are not URL-encoding your query string. This can be easily accomplished using URLSearchParams.
Also, GET requests do not have any request body so do not need a content-type header. GET is also the default method for fetch()
const params = new URLSearchParams({
input_data: JSON.stringify({
list_info: {
row_count: 100
},
fields_required: ["id"]
})
})
try {
// 👇 note the ` quotes
const response = await fetch(`https://server/api/v3/users?${params}`, {
headers: {
TECHNICIAN_KEY: "sdfdsfsdfsd4343323242324",
}
})
if (!response.ok) {
throw new Error(`${response.status}: ${await response.text()}`)
}
res.json(await response.json())
} catch (err) {
console.error(err)
res.status(500).send(err)
}
currently i am using react with nodeJS and express as api. When I send data to api using redux saga without formData it works fine, but when I try to submit with formData, there is an res message and I think it happened because the payload that was sent was empty
and on the network-payload tab, no form data is sent
here's the code I use
export const addNewData = values => {
const data = new FormData()
data.append("nama", values.nama)
data.append("harga", values.harga)
// data.append("image", selectedFiles)
data.append("fasilitas", values.fasilitas)
data.append("deskripsi", values.deskripsi)
post(url.ADD_NEW_DATA, data, {
headers: { "content-type": "multipart/form-data" },
})
}
and
const axiosApi = axios.create({
baseURL: API_URL,
})
axiosApi.defaults.headers.common["authorization"] = token
axiosApi.interceptors.response.use(
response => response,
error => Promise.reject(error)
)
export async function post(url, data, config = {}) {
return axiosApi
.post(url, { ...data }, { ...config })
.then(response => response.data.data)
}
then I tried directly on the submit button without using redux saga and it worked perfectly
Axios.post("http://localhost:4000/v1/data/insert", data, {
headers: {
"content-type": "multipart/form-data",
"authorization": token,
},
})
.then(res => {
console.log("success ", res)
})
.catch(err => console.log(err))
Can anyone help me please? I want to keep using redux saga
UPDATE
When i change {...data} to data in async function, formData is successfully sent normally, anyone can explain about this? will it affect when I submit data not in formData format?
export async function post(url, data, config = {}) {
return axiosApi
.post(url, data, { ...config })
.then(response => response.data.data)
}
Solved by changing {...data} to data
export async function post(url, data, config = {}) {
return axiosApi
.post(url, data, { ...config })
.then(response => response.data.data)
}
I am trying to make my server a middleman so that the frontend queries the server with a searchedValue, the server queries the API with the searchedValue, and the server returns the API response to the frontend.
Currently, the server is querying the API correctly. Here is the code and responses:
Query: http://localhost:3000/optionsAPI/AAPL
Code [server.js]:
app.get("/optionsAPI/:ticker", (req, res) => {
var tempJSON = [];
const searchString = `${req.params.ticker}`;
const url = `API URL HERE, HIDING FOR SECURITY`;
fetch(url, { headers: { Accept: 'application/json' } })
.then(res => res.json()
.then((json) => {
tempJSON = json;
console.log(tempJSON);
}))
.catch(err => console.error(err)); // eslint-disable-line
res.send({ message: tempJSON });
});
Here is the code in the component:
Code [Component.js]:
useEffect(() => {
const fetchData = () => {
const url = `/optionsAPI/${searchedValue}`;
fetch(url, { headers: { Accept: 'application/json' } })
.then(res => res.json()
.then((json) => {
setOptions(json.option_activity || []);
}))
.catch(err => console.error(err)); // eslint-disable-line
};
debounce(fetchData());
}, [searchedValue]);
The console log is perfect! It logs tempJSON as I would expect to see it, but the res.send message is simply {"message":[]}. Therefore, the response my frontend gets is an empty []. This doesn't; make sense - the console is logging the response, so why is the frontend receiving a blank []?
Thanks in advance.
In your code you are calling an api which returns a promise, so to handle the data returned by the promise you should add your code inside .then() function, meaning you have to wait for the promise to be resolved before accessing the data and sending it to the client
app.get("/optionsAPI/:ticker", (req, res) => {
var tempJSON = [];
const searchString = `${req.params.ticker}`;
const url = `API URL HERE, HIDING FOR SECURITY`;
fetch(url, { headers: { Accept: 'application/json' } })
.then(res => res.json()
.then((json) => {
tempJSON = json;
console.log(tempJSON);
// the response should be sent from here
res.send({ message: tempJSON });
}))
.catch(err => {
console.error(err);
// you also need to send a response when catching erros
res.status(400).send({ err });
});
});
you can use async / await to make your code much cleaner
app.get("/optionsAPI/:ticker", async (req, res) => {
var tempJSON = [];
const searchString = `${req.params.ticker}`;
const url = `API URL HERE, HIDING FOR SECURITY`;
try {
const result = await fetch(url, { headers: { Accept: 'application/json' } })
const json = await result.json()
tempJSON = json;
console.log(tempJSON);
res.send({ message: tempJSON });
} catch (error) {
console.error(error);
res.status(400).send({ error });
}
});
I'm not getting data in body object from fetch request on my server side. I've tried other solutions on SO but nothing is working so far in my case. I'm using Node express on backend and React on frontend.
in component:
addCity = _ => {
const { city } = this.state;
fetch('http://localhost:3003/city_create', {
method: "POST",
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
create_name: city.name,
create_district: city.district,
create_population: city.population
})
})
.then(res => {
console.log(res);
this.getCities;
})
.catch(err => console.log(err))
}
server route:
router.post('/city_create', (req, res) => {
console.log("Trying to create new city...")
const { create_name, create_district, create_population } = req.body;
//debugger
const queryString = "INSERT INTO city (Name, District, Population, CountryCode) VALUES (?,?,?,'PAK')";
getConnection().query(queryString, [create_name, create_district, create_population], (err, rows, fields) => {
console.log(create_name, create_district, create_population);
if (err) {
console.log('A db error occurred:' + err);
res.sendStatus(500);
return;
//throw err;
}
console.log("Inserted a new City with Id: ", rows.insertId);
});
res.end();
});
tried using FormData and accept property in header as well but no luck.
You need to install body-parser module to extract the entire body portion of an incoming request stream and exposes it on req.body.
It was part of express earlier, now we need to install separately.
npm install body-parser --save
and use the middleware as :
app.use(bodyParser.json())
I'm a little new to creating a backend in Node/Express, but I am trying use axios to make HTTP requests. I've set up express routes that will make the necessary request and I know from using Postman that GET request I'm testing does return a response. Where I'm stuck is how to return that data and send it to my React/Redux app to use.
-Server Side-
//Express Route
app.get('/api/recipes', recipeController.getRecipes)
//Controller Function that makes axios request
const axios = require('axios')
const Promise = require('bluebird')
module.exports = {
getRecipes(req, res) {
const url = "https://gw.hellofresh.com/api/recipes/search?country=us&limit=9"
const token = "IUzI1NiIsInR5c"
axios
.get(url, {
"headers": {"Authorization": "Bearer " + token}
})
.then((response) => {
console.log(response)
})
.catch((err) => {
console.log(err)
})
}
}
-Client Side-
I dispatch the following action and make a call using the endpoint I created. However, at this point, I'd get an error status even though on the server side I was able to get a response. I tried playing around using Promises as I read that axios GET requests returns promises, but couldn't wrap my head around on how to implement it.
export const getRecipes = () => {
return (dispatch) => {
axios
.get('/api/recipes')
.then((resp) => {
console.log(resp)
})
.catch((err) => {
console.log(err)
})
}
}
You need to call res.send in the route, to send the data to the client:
module.exports = {
getRecipes(req, res) {
const url = "https://gw.hellofresh.com/api/recipes/search?country=us&limit=9"
const token = "IUzI1NiIsInR5c"
axios
.get(url, {
"headers": {"Authorization": "Bearer " + token}
})
.then(response => {
console.log(response)
res.send(response) // <= send data to the client
})
.catch(err => {
console.log(err)
res.send({ err }) // <= send error
})
}
}