Fetch() api in react native failed - "Unhandled promise rejection" - javascript

Im trying to use the Fetch api in react native but im having some issues. Whenever I try to make a POST, i get a "Unhandled promise rejection" error saying the body not allowed for GET or HEAD reequests.
The GET method works perfectly fine, it's just with POST.
Any ideas?
submit_task() {
this.setModalVisible(!this.state.modalVisible);
const task = {
text: this.state.content,
date: this.state.date
}
console.log(task);
const API_URL = 'http://localhost:5000/tasks';
fetch(API_URL, {
methood: 'POST',
body: JSON.stringify(task),
headers: {
'Content-Type': 'application-json',
}
})
}

There's a typo in your fetch options methood should be method. Separately to that issue it's recommended to catch errors from Promises, something like:
submit_task() {
this.setModalVisible(!this.state.modalVisible);
const task = {
text: this.state.content,
date: this.state.date
}
const API_URL = 'http://localhost:5000/tasks';
fetch(API_URL, {
method: 'POST',
body: JSON.stringify(task),
headers: {
'Content-Type': 'application-json',
}
}).catch(error => {
// Maybe present some error/failure UI to the user here
});
}

This error because of you didn't handle your exception in your API call use .catch like this
submit_task() {
this.setModalVisible(!this.state.modalVisible);
const task = {
text: this.state.content,
date: this.state.date
}
console.log(task);
const API_URL = 'http://localhost:5000/tasks';
fetch(API_URL, {
methood: 'POST',
body: JSON.stringify(task),
headers: {
'Content-Type': 'application-json',
}
})
.catch(error => {
console.log('found error', error)
});
}
Or make your api call inside try and use catch function for handling the exception or error.
try {
submit_task() {
this.setModalVisible(!this.state.modalVisible);
const task = {
text: this.state.content,
date: this.state.date
}
console.log(task);
const API_URL = 'http://localhost:5000/tasks';
fetch(API_URL, {
methood: 'POST',
body: JSON.stringify(task),
headers: {
'Content-Type': 'application-json',
}
})
}
}
catch(e){
console.log('found error', error)
}

Related

Put Not Working to Update with Axios Mongoose

I am trying to set up an edit feature to edit a post. Right now I am trying to update a specific post by ID and then I'll make it dynamic.
I can get axios to send the PUT request but I don't receive any indication that it is received on the router. Also the ID I have set it showing up correctly in the URL.
I'm not sure how to send the data over to the router so it can find the ID.
Edit component
function handleSubmit(event){
event.preventDefault()
axios ( {
url: `/api/${props.data[0]._id}`,
method: 'PUT',
headers: { "Content-Type": "multipart/form-data" },
id: props.data[0]._id
})
.then(() => {
console.log(`data has been sent to the server from axios: ${props.data[0]._id}`)
})
.catch(() => {
console.log('Data could not be sent from axios')
})
}
Router
router.put('/:id', async (req, res) => {
try {
const updatedGratitude = await PostGratitude.findByIdAndUpdate(req.params.id)
res.status(200).json(updatedGratitude)
} catch (err){
next(err)
}
})
if you are editing a post then you should send the data in the request as well
like a title: "" and description: "" or something and in the in the router, you could write something like this :
function handleSubmit(event) {
event.preventDefault()
axios({
url: `/api/${props.data[0]._id}`,
method: 'PUT',
headers: { "Content-Type": "application/json" },
data: {
title: '',
description: ''
}
})
.then((response) => {
console.log(response)
})
.catch((err) => {
console.log(err)
})
}
you need to pass the arguments as to what to update as well, here is an example of a code that I wrote
router.put('/updatentry/:id',fetchuser, async (req, res) => {
var success = false
try {
const { title, description } = req.body
let newentry = { title: title , description: description
}
let old_entry = await Journal.findById(req.params.id);
if (!old_entry) {
return res.status(404).send({ success, error: 'Not Found'})
}
const update_entry = await Journal.findByIdAndUpdate(req.params.id, { $set: newentry }, { new: true })
return res.send(res: update_entry)
} catch (error) {
return res.status(500).send(error: 'Internal Server Error')
}
})
This is because you forgot the update body on method. Try this:
PostGratitude.findByIdAndUpdate(req.params.id, req.body)
instead of :
await PostGratitude.findByIdAndUpdate(req.params.id)
Because mongoose can not know what to update :D

axios vs fetch throwing error on file upload

I am using fetch instead of axios in my react project
my this method working fine with the axios to upload an image on the server
Upload image function
<Upload customRequest={dummyRequest} className="upload-btn-container" onChange={onChange}>
<Button className="btn custom-upload-btn">Upload Image</Button>
</Upload>
const uploadPicture = async (data) =>{
const value = await getUploadPicture(data)
if(value.value.data.status){
await addImage(value.value.data.data)
}
}
const onChange = async (info) => {
for (let i = 0; i < info.fileList.length; i++) {
const data = new FormData();
data.append('file', info.fileList[i]);
data.append('filename', info.fileList[i].name);
setImgName(info.fileList[i].name)
let value = await uploadPicture(data);
}
};
return axios({
method: 'post',
url: `${NewHostName}/upload`,
headers: {
'Content-Type': 'application/json',
'Authorization': localStorage.getItem('authToken')
},
data:data
})
.then(response => {
return response
}).catch(err => {
console.log("err", err)
})
whereas when I do same with the fetch it throws me error on the backend "Cannot read property of split of undefined"
return fetch(`${NewHostName}/upload`, {
method: "post",
headers: {
"Content-Type": "application/json",
Authorization: localStorage.getItem('authToken'),
},
body: JSON.stringify(data),
// body :data
})
.then((res) => {
return res.json();
})
.then((payload) => {
return payload;
})
.catch((err) => {
throw err;
})
Not sure what is the reason behind this
this is my backend upload api
const handler = async (request, reply) => {
try {
const filename = request.payload.filename
const fileExtension = filename.split('.').pop()
AWS.config.update({
accessKeyId: Config.get('/aws').accessKeyId,
secretAccessKey: Config.get('/aws').secretAccessKey,
region: Config.get('/aws').region
})
const s3 = new AWS.S3({
params: {
Bucket: Config.get('/aws').bucket
}
})
const Key = `/${shortid.generate()}.${fileExtension}`
const obj = {
Body: request.payload.file,
Key,
ACL: 'public-read'
}
s3.upload(obj, async (err, data) => {
if (err) {
return reply({ status: false, 'message': err.message, data: '' }).code(Constants.HTTP402)
} else if (data) {
return reply({ status: true, 'message': 'ok', data: data.Location }).code(Constants.HTTP200)
}
})
} catch (error) {
return reply({
status: false,
message: error.message,
data: ''
})
}
}
data is a FormData object.
In your original code you are lying when you say 'Content-Type': 'application/json'. Possibly Axios recognises that you've passed it a FormData object and ignores your attempt to override the Content-Type.
Your fetch code, on the other hand, says body: JSON.stringify(data) which tries to stringify the FormData object and ends up with "{}" which has none of your data in it.
Don't claim you are sending JSON
Don't pass your FormData object through JSON.stringify
For image upload you not use JSON.stringify(data).You can try with formData and append an image file with form data.
var formdata = new FormData();
formdata.append("image", data);
Did you check that
const filename = request.payload.filename
exists?
Is the key really payload? The following does not make any changes to your code:
.then((payload) => {
return payload;
})

How to resolve Empty error with status code 500 axios?

this is my code :
Express Routes:
router.route('/block')
.post(controller.ticketBlocking);
Express Controller:
const axios = require('axios');
const OAuth = require('oauth-1.0a');
const crypto = require('crypto');
const ticketBlocking = (req, res) => {
const data = JSON.stringify({
source = req.body.source
});
const oauth = OAuth({
consumer: {
key: '....', //Hided the key
secret: '....', //Hided the secret
},
signature_method: 'HMAC-SHA1',
hash_function(base_string, key) {
return crypto.createHmac('sha1', key).update(base_string).digest('base64');
}
});
const request_data = {
url: 'http://link.vvv/blockTicket',
method: 'post',
};
axios({
method: request_data.method,
url: request_data.url,
headers: {
'Content-Type': 'application/json',
Accept: 'application/json',
...oauth.oauth.toHeader(oauth.oauth.authorize(request_data)),
},
data : data
})
.then((response) => {
console.log(JSON.stringify(response.data));
})
.catch(function (error) {
if (error.response) {
console.log(error.response.data);
console.log(error.response.status);
} else if (error.request) {
console.log(error.request);
} else {
console.log('Error', error.message);
}
console.log(error.config);
});
};
the npm package which am using is - "oauth-1.0a"
The problem am facing is, when i use GET method with different end point, i get an output but when ever i use POST method am getting an empty error with status code 500
I dont know where is the mistake, am using oauth1.0a for authorization, please help !

React and NodeJS: How can i use received data from Server on Client?

I want to use received data from server on client . I use a NodeJS Server with NextJS and React.
I use this function on the server:
function addEmailToMailChimp(email, callback) {
var options = {
method: 'POST',
url: 'https://XXX.api.mailchimp.com/3.0/lists/XXX/members',
headers:
{
'Postman-Token': 'XXX',
'Cache-Control': 'no-cache',
Authorization: 'Basic XXX',
'Content-Type': 'application/json'
},
body: { email_address: email, status: 'subscribed' },
json: true
};
request(options, callback);
}
The function will be run from this point:
server.post('/', (req, res) => {
addEmailToMailChimp(req.body.email, (error, response, body) => {
// This is the callback function which is passed to `addEmailToMailChimp`
try {
var respObj = {}; //Initial response object
if (response.statusCode === 200) {
respObj = { success: `Subscribed using ${req.body.email}!`, message: JSON.parse(response.body) };
} else {
respObj = { error: `Error trying to subscribe ${req.body.email}. Please try again.`, message: JSON.parse(response.body) };
}
res.send(respObj);
} catch (err) {
var respErrorObj = { error: 'There was an error with your request', message: err.message };
res.send(respErrorObj);
}
});
})
The try method is used to verify that an email address could be successfully saved to MailChimp. An appropriate message is sent to the client.
On the Client-Side, i use this function to receive and display the data from the server:
handleSubmit() {
const email = this.state.email;
this.setState({email: ""});
fetch('/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({email:email}),
}).then(res => {
if(res.data.success) {
//If the response from MailChimp is good...
toaster.success('Subscribed!', res.data.success);
this.setState({ email: '' });
} else {
//Handle the bad MailChimp response...
toaster.warning('Unable to subscribe!', res.data.error);
}
}).catch(error => {
//This catch block returns an error if Node API returns an error
toaster.danger('Error. Please try again later.', error.message);
});
}
The problem: The email address is saved successfully at MailChimp, but the message is always displayed: 'Error. Please try again later.'from the .catch area. When i log the error from the catch area i get this:
TypeError: Cannot read property 'success' of undefined
Where is my mistake? I have little experience in Node.js environments. I would be very grateful if you could show me concrete solutions. Thank you for your replies.
With fetch theres no data property on the response. You have to call res.json() and return that promise. From there the response body will be read and deserialized.
handleSubmit() {
const email = this.state.email;
this.setState({email: ""});
fetch('/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({email:email}),
})
.then(res => {
console.log(res); //to make sure the expected object is returned
if(res.data.success) {
//If the response from MailChimp is good...
toaster.success('Subscribed!', res.data.success);
this.setState({ email: '' });
} else {
//Handle the bad MailChimp response...
toaster.warning('Unable to subscribe!', res.data.error);
}
}).catch(error => {
//This catch block returns an error if Node API returns an error
toaster.danger('Error. Please try again later.', error.message);
});
}
Two things you need to change:
Call and wait for res.json() to get the response body as json object.
The result of 1. is your 'data' object that you can use directly
handleSubmit() {
//...
fetch('/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({email:email}),
})
.then(res => res.json())
.then(data => {
if(data.success) {
//...
toaster.success('Subscribed!', data.success);
} else {
toaster.warning('Unable to subscribe!', data.error);
}
}).catch(error => {
//...
});
}

Axios post stay on pending

This is a simple Post request using Axios inside Vue:
import axios from 'axios'
export default {
name: 'HelloWorld',
props: {
msg: String
},
mounted () {
const code = 'test'
const url = 'http://localhost:3456/'
axios.post(url, code, { headers: {'Content-type': 'application/x-www-form-urlencoded', } }).then(this.successHandler).catch(this.errorHandler)
},
methods: {
successHandler (res) {
console.log(res.data)
},
errorHandler (error) {
console.log(error)
}
}
}
The Get method works fine. But Post stay as "Pending" on Network tab. I can confirm that there is a Post method on my webservice and it return something (tested on Postman).
UPDATE
Sending code as a param:
axios(url, {
method: 'POST',
headers: {
'content-type': 'application/json',
},
params: {
code : 'test'
},
}).then(this.successHandler).catch(this.errorHandler)
WEBSERVICE
server.post('/', (req, res, next) => {
const { code } = req.params
const options = {
validate: 'soft',
cheerio: {},
juice: {},
beautify: {},
elements: []
}
heml(code, options).then(
({ html, metadata, errors }) => {
res.send({metadata, html, errors})
next()
})
})
I think there's issue with your axios request structure.
Try this:
const URL = *YOUR_URL*;
axios(URL, {
method: 'POST',
headers: {
'content-type': 'application/json',
},
data: *YOUR_PAYLOAD*,
})
.then(response => response.data)
.catch(error => {
throw error;
});
If you're sending a query param:
axios(URL, {
method: 'POST',
headers: {
'content-type': 'application/json',
},
params: {
code: 'your_string'
},
})
if it is path variable you can set your url:
const url = `http://localhost:3456/${code}`
Let me know if the issue still persists
I also was facing the same. Network call was pending all the time and Mitigated it by passing the response back from server.js(route file) e.g(res.json(1);) and it resolved the issue

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