I am trying to make a fetch request specifically a post request to tinyURL to shortern a url generated on my site. here is the tinyURL API
Currently, I am writing my code like this but it doesn't appear to be returning the short url.
the word tinyurl seems to be banned within links so all links
containing the word tinyurl have been replaced with "SHORT"
here is the tinyURL API https://SHORT.com/app/dev
import * as React from 'react'
interface tinyURlProps { url: string } export const useTinyURL = ({ url }: tinyURlProps) => { React.useEffect(() => {
const apiURL = 'https://api.SHORT.com/create'
const data = JSON.stringify({ url: url, domain: 'tiny.one' })
const options = {
method: 'POST',
body: data,
headers: {
Authorization:
'Bearer xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
Accept: 'application/json',
'Content-Type': 'application/json',
},
} as RequestInit
fetch(apiURL, options)
.then((response) => console.log(response))
.then((error) => console.error(error))
console.log('TinyUrl ran') }, [url])
}
The snippet below seems to work
const qs = selector => document.querySelector(selector);
let body = {
url: `https://stackoverflow.com/questions/66991259/how-to-make-a-fetch-request-to-tinyurl`,
domain: `tiny.one`
}
fetch(`https://api.tinyurl.com/create`, {
method: `POST`,
headers: {
accept: `application/json`,
authorization: `Bearer 2nLQGpsuegHP8l8J0Uq1TsVkCzP3un3T23uQ5YovVf5lvvGOucGmFOYRVj6L`,
'content-type': `application/json`,
},
body: JSON.stringify(body)
})
.then(response => {
if (response.status != 200) throw `There was a problem with the fetch operation. Status Code: ${response.status}`;
return response.json()
})
.then(data => {
qs(`#output>pre`).innerText = JSON.stringify(data, null, 3);
qs(`#link`).href = data.data.tiny_url;
qs(`#link`).innerText = data.data.tiny_url;
})
.catch(error => console.error(error));
body {
font-family: calibri;
}
<p><a id="link" /></p>
<span id="output"><pre/></span>
Okay, I am still new in Javascript. As per title, how to fetch a single API url but with 4 different parameters. My goal is to display 4 different categories as the result
Example (I have 4 different categories):
const category = [1,2,3,4];
I want to make each category calls for an api
Method 1
To call category 1:
const url = 'http://www.myapiurl.com/thisapi';
const parameter = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=1`
};
fetch(url, options)
.then(response => response.json())
.then(object => {})
To call category 2:
const url = 'http://www.myapiurl.com/thisapi';
const parameter = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=2`
};
fetch(url, options)
.then(response => response.json())
.then(object => {})
To call category 3:
const url = 'http://www.myapiurl.com/thisapi';
const parameter = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=3`
};
fetch(url, options)
.then(response => response.json())
.then(object => {})
To call category 4:
const url = 'http://www.myapiurl.com/thisapi';
const parameter = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=4`
};
fetch(url, options)
.then(response => response.json())
.then(object => {})
Or maybe I can simplify them a bit like this:
Method 2
const parameter1 = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=1`
};
const parameter2 = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=2`
};
const parameter3 = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=3`
};
const parameter4 = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=4`
};
Promise.all([
fetch(url,parameter1).then(value => value.json()),
fetch(url,parameter2).then(value => value.json()),
fetch(url,parameter3).then(value => value.json()),
fetch(url,parameter4).then(value => value.json()),
])
.then((value) => {
console.log(value)
//json response
})
.catch((err) => {
console.log(err);
});
But all of these are very redundant and uneccesarry repetition. What if I have 50 categories? How do I simplify all of these Fetch API calls? Please give me an enlightment. Thanks in advance
You can take it a step further. Since your method, headers and part of the body are all identical, just extract that to one function. Custom-build the parameters to the category, then call fetch.
const thatPostFunction = category => {
const method = 'POST'
const headers = { 'Content-Type': 'application/x-www-form-urlencoded' }
const body = `USERID=userid&TOKEN=usertoken&CATEGORY=${category}`
return fetch(url, { method, headers, body })
}
const categories = [...category ids...]
const promises = categories.map(c => thatPostFunction(c))
Promise.all(promises)
.then((value) => {
console.log(value)
//json response
})
.catch((err) => {
console.log(err);
});
I would write a function to convert a category id to a Promise, and then write a wrapper function to convert an array of category ids to a Promise resolving to an array of fetch results:
const fetchCategory = (catId) => {
const url = 'http://www.myapiurl.com/thisapi';
const options = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=${catId}`
};
return fetch(url, options)
.then(response => response.json())
}
const fetchCategories = (categories) => Promise.all(categories.map(fetchCategory))
const categories = [1, 2, 3, 4]
fetchCategories(categories).then(categoryResults => {
// here categoryResults is an array of the fetch results for each category.
console.log(categoryResults)
})
<script>
// Faking out fetch for testing
const fetch = (url, opts) => Promise.resolve({
json: () => ({
categoryId: `${opts.body.slice(opts.body.lastIndexOf('=') + 1)}`,
more: 'here'
})
})
</script>
You can just create a function that runs all of them:
const categories = [1,2,3,4];
const postUrls = (items) => {
const promises = []
items.forEach(item => {
const url = 'http://www.myapiurl.com/thisapi';
const options = {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `USERID=userid&TOKEN=usertoken&CATEGORY=${item}`
};
const prms = fetch(url, options)
.then(response => response.json())
promises.push(prms)
})
return Promise.all(promises)
}
postUrls(categories)
.then(data => console.log('Done!'))
If your API is flexible then you may be able to ask for all 4 categories at the same time. I have seen APIs do it like this:
body: `USERID=userid&TOKEN=usertoken&CATEGORY=1,2,3,4`
And I have seen them do it like this:
body: `USERID=userid&TOKEN=usertoken&CATEGORY=1&CATEGORY=2&CATEGORY=3&CATEGORY=4`
Again, your API would need to be able to enumerate through the categories and return the results in some kind of object or array.
I am using react native to create an application to act as a website that currently exists (with a user interface that works on a phone). i am using the "fetch" method to send a Http POST request to get information from a web server. The web server sends a response but it doesn't include the response message:
I apologies that is an image but the debugger is not working for me.
The code used to send the request:
HttpRequest = (RequestURL, callback) => {
var AdminLoginBindingModel = {
usr: this.state.username,
pwd: this.state.password,
}
fetch(RequestURL,
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(AdminLoginBindingModel)
})
.then((res) => {
callback(res);
})
.catch((error) => {
this.setState({Response: "Error: " + error});
})
}
The callback function in the parameters is just a function to change the state variable to display the information on the screen
ValidateResponse(response){
this.setState({Response: "Result: " + JSON.stringify(response),
displayMessage: "Success"});
console.log(JSON.stringify(response));
}
The Request being sent is "https://mibase-test.mibase.com.au/members/api/startSession.php?usr=&pwd="
The server responds with a json object regardless of a correct login or not
Edit:
Changing the response to
.then((res) => {
callback(res.json());
})
Result:
To get object from fetch response, you have to call res.json like following:
fetch(RequestURL, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(AdminLoginBindingModel)
})
.then(res => res.json()) // HERE
.then(obj => callback(obj))
But it occurs an error because response body itself is invalid json format. It contains some HTML tags:
{"member": {"username":"","password":"","key":"***","status":"No"}}<br><br>Username: <br>Key: ***
Please check the inplementation of server.
EDIT: full code here
const fetch = require("node-fetch")
HttpRequest = (RequestURL, callback) => {
const AdminLoginBindingModel = { usr: "foo", pwd: "bar" }
fetch(RequestURL, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(AdminLoginBindingModel)
})
.then(res => res.json())
.then(obj => callback(obj))
.catch(error => console.log(error))
}
const ValidateResponse = response => console.log(JSON.stringify(response))
URL = 'https://mibase-test.mibase.com.au/members/api/startSession.php?usr=&pwd='
HttpRequest(URL, ValidateResponse)
response doesn't contain received data directly. It provides interface methods to retrieve it. For example use response.json() to parse response text as JSON. It will return promise that resolves to the parsed object. You won't need to call JSON.parse on it:
fetch(RequestURL,
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(AdminLoginBindingModel)
})
.then((res) => {
return res.json();
}).then((obj) => {
console.log(obj);
});
Check https://developer.mozilla.org/en-US/docs/Web/API/Response and https://facebook.github.io/react-native/docs/network.html for more information.
I'm trying to POST a JSON object using fetch.
From what I can understand, I need to attach a stringified object to the body of the request, e.g.:
fetch("/echo/json/",
{
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
method: "POST",
body: JSON.stringify({a: 1, b: 2})
})
.then(function(res){ console.log(res) })
.catch(function(res){ console.log(res) })
When using jsfiddle's JSON echo I'd expect to see the object I've sent ({a: 1, b: 2}) back, but this does not happen - chrome devtools doesn't even show the JSON as part of the request, which means that it's not being sent.
With ES2017 async/await support, this is how to POST a JSON payload:
(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);
})();
Can't use ES2017? See #vp_art's answer using promises
The question however is asking for an issue caused by a long since fixed chrome bug.
Original answer follows.
chrome devtools doesn't even show the JSON as part of the request
This is the real issue here, and it's a bug with chrome devtools, fixed in Chrome 46.
That code works fine - it is POSTing the JSON correctly, it just cannot be seen.
I'd expect to see the object I've sent back
that's not working because that is not the correct format for JSfiddle's echo.
The correct code is:
var payload = {
a: 1,
b: 2
};
var data = new FormData();
data.append( "json", JSON.stringify( payload ) );
fetch("/echo/json/",
{
method: "POST",
body: data
})
.then(function(res){ return res.json(); })
.then(function(data){ alert( JSON.stringify( data ) ) })
For endpoints accepting JSON payloads, the original code is correct
I think your issue is jsfiddle can process form-urlencoded request only. But correct way to make json request is pass correct json as a body:
fetch('https://httpbin.org/post', {
method: 'POST',
headers: {
'Accept': 'application/json, text/plain, */*',
'Content-Type': 'application/json'
},
body: JSON.stringify({a: 7, str: 'Some string: &=&'})
}).then(res => res.json())
.then(res => console.log(res));
From search engines, I ended up on this topic for non-json posting data with fetch, so thought I would add this.
For non-json you don't have to use form data. You can simply set the Content-Type header to application/x-www-form-urlencoded and use a string:
fetch('url here', {
method: 'POST',
headers: {'Content-Type':'application/x-www-form-urlencoded'}, // this line is important, if this content-type is not set it wont work
body: 'foo=bar&blah=1'
});
An alternative way to build that body string, rather then typing it out as I did above, is to use libraries. For instance the stringify function from query-string or qs packages. So using this it would look like:
import queryString from 'query-string'; // import the queryString class
fetch('url here', {
method: 'POST',
headers: {'Content-Type':'application/x-www-form-urlencoded'}, // this line is important, if this content-type is not set it wont work
body: queryString.stringify({for:'bar', blah:1}) //use the stringify object of the queryString class
});
After spending some times, reverse engineering jsFiddle, trying to generate payload - there is an effect.
Please take eye (care) on line return response.json(); where response is not a response - it is promise.
var json = {
json: JSON.stringify({
a: 1,
b: 2
}),
delay: 3
};
fetch('/echo/json/', {
method: 'post',
headers: {
'Accept': 'application/json, text/plain, */*',
'Content-Type': 'application/json'
},
body: 'json=' + encodeURIComponent(JSON.stringify(json.json)) + '&delay=' + json.delay
})
.then(function (response) {
return response.json();
})
.then(function (result) {
alert(result);
})
.catch (function (error) {
console.log('Request failed', error);
});
jsFiddle: http://jsfiddle.net/egxt6cpz/46/ && Firefox > 39 && Chrome > 42
2021 answer: just in case you land here looking for how to make GET and POST Fetch api requests using async/await or promises as compared to axios.
I'm using jsonplaceholder fake API to demonstrate:
Fetch api GET request using async/await:
const asyncGetCall = async () => {
try {
const response = await fetch('https://jsonplaceholder.typicode.com/posts');
const data = await response.json();
// enter you logic when the fetch is successful
console.log(data);
} catch(error) {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
}
}
asyncGetCall()
Fetch api POST request using async/await:
const asyncPostCall = async () => {
try {
const response = await fetch('https://jsonplaceholder.typicode.com/posts', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
});
const data = await response.json();
// enter you logic when the fetch is successful
console.log(data);
} catch(error) {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
}
}
asyncPostCall()
GET request using Promises:
fetch('https://jsonplaceholder.typicode.com/posts')
.then(res => res.json())
.then(data => {
// enter you logic when the fetch is successful
console.log(data)
})
.catch(error => {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
})
POST request using Promises:
fetch('https://jsonplaceholder.typicode.com/posts', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
})
.then(res => res.json())
.then(data => {
// enter you logic when the fetch is successful
console.log(data)
})
.catch(error => {
// enter your logic for when there is an error (ex. error toast)
console.log(error)
})
GET request using Axios:
const axiosGetCall = async () => {
try {
const { data } = await axios.get('https://jsonplaceholder.typicode.com/posts')
// enter you logic when the fetch is successful
console.log(`data: `, data)
} catch (error) {
// enter your logic for when there is an error (ex. error toast)
console.log(`error: `, error)
}
}
axiosGetCall()
POST request using Axios:
const axiosPostCall = async () => {
try {
const { data } = await axios.post('https://jsonplaceholder.typicode.com/posts', {
// your expected POST request payload goes here
title: "My post title",
body: "My post content."
})
// enter you logic when the fetch is successful
console.log(`data: `, data)
} catch (error) {
// enter your logic for when there is an error (ex. error toast)
console.log(`error: `, error)
}
}
axiosPostCall()
I have created a thin wrapper around fetch() with many improvements if you are using a purely json REST API:
// Small library to improve on fetch() usage
const api = function(method, url, data, headers = {}){
return fetch(url, {
method: method.toUpperCase(),
body: JSON.stringify(data), // send it as stringified json
credentials: api.credentials, // to keep the session on the request
headers: Object.assign({}, api.headers, headers) // extend the headers
}).then(res => res.ok ? res.json() : Promise.reject(res));
};
// Defaults that can be globally overwritten
api.credentials = 'include';
api.headers = {
'csrf-token': window.csrf || '', // only if globally set, otherwise ignored
'Accept': 'application/json', // receive json
'Content-Type': 'application/json' // send json
};
// Convenient methods
['get', 'post', 'put', 'delete'].forEach(method => {
api[method] = api.bind(null, method);
});
To use it you have the variable api and 4 methods:
api.get('/todo').then(all => { /* ... */ });
And within an async function:
const all = await api.get('/todo');
// ...
Example with jQuery:
$('.like').on('click', async e => {
const id = 123; // Get it however it is better suited
await api.put(`/like/${id}`, { like: true });
// Whatever:
$(e.target).addClass('active dislike').removeClass('like');
});
Had the same issue - no body was sent from a client to a server.
Adding Content-Type header solved it for me:
var headers = new Headers();
headers.append('Accept', 'application/json'); // This one is enough for GET requests
headers.append('Content-Type', 'application/json'); // This one sends body
return fetch('/some/endpoint', {
method: 'POST',
mode: 'same-origin',
credentials: 'include',
redirect: 'follow',
headers: headers,
body: JSON.stringify({
name: 'John',
surname: 'Doe'
}),
}).then(resp => {
...
}).catch(err => {
...
})
This is related to Content-Type. As you might have noticed from other discussions and answers to this question some people were able to solve it by setting Content-Type: 'application/json'. Unfortunately in my case it didn't work, my POST request was still empty on the server side.
However, if you try with jQuery's $.post() and it's working, the reason is probably because of jQuery using Content-Type: 'x-www-form-urlencoded' instead of application/json.
data = Object.keys(data).map(key => encodeURIComponent(key) + '=' + encodeURIComponent(data[key])).join('&')
fetch('/api/', {
method: 'post',
credentials: "include",
body: data,
headers: {'Content-Type': 'application/x-www-form-urlencoded'}
})
The top answer doesn't work for PHP7, because it has wrong encoding, but I could figure the right encoding out with the other answers. This code also sends authentication cookies, which you probably want when dealing with e.g. PHP forums:
julia = function(juliacode) {
fetch('julia.php', {
method: "POST",
credentials: "include", // send cookies
headers: {
'Accept': 'application/json, text/plain, */*',
//'Content-Type': 'application/json'
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" // otherwise $_POST is empty
},
body: "juliacode=" + encodeURIComponent(juliacode)
})
.then(function(response) {
return response.json(); // .text();
})
.then(function(myJson) {
console.log(myJson);
});
}
It might be useful to somebody:
I was having the issue that formdata was not being sent for my request
In my case it was a combination of following headers that were also causing the issue and the wrong Content-Type.
So I was sending these two headers with the request and it wasn't sending the formdata when I removed the headers that worked.
"X-Prototype-Version" : "1.6.1",
"X-Requested-With" : "XMLHttpRequest"
Also as other answers suggest that the Content-Type header needs to be correct.
For my request the correct Content-Type header was:
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8"
So bottom line if your formdata is not being attached to the Request then it could potentially be your headers. Try bringing your headers to a minimum and then try adding them one by one to see if your problem is resolved.
If your JSON payload contains arrays and nested objects, I would use URLSearchParams and jQuery's param() method.
fetch('/somewhere', {
method: 'POST',
body: new URLSearchParams($.param(payload))
})
To your server, this will look like a standard HTML <form> being POSTed.
You could do it even better with await/async.
The parameters of http request:
const _url = 'https://jsonplaceholder.typicode.com/posts';
let _body = JSON.stringify({
title: 'foo',
body: 'bar',
userId: 1,
});
const _headers = {
'Content-type': 'application/json; charset=UTF-8',
};
const _options = { method: 'POST', headers: _headers, body: _body };
With clean async/await syntax:
const response = await fetch(_url, _options);
if (response.status >= 200 && response.status <= 204) {
let data = await response.json();
console.log(data);
} else {
console.log(`something wrong, the server code: ${response.status}`);
}
With old fashion fetch().then().then():
fetch(_url, _options)
.then((res) => res.json())
.then((json) => console.log(json));
**//POST a request**
const createTodo = async (todo) => {
let options = {
method: "POST",
headers: {
"Content-Type":"application/json",
},
body: JSON.stringify(todo)
}
let p = await fetch("https://jsonplaceholder.typicode.com/posts", options);
let response = await p.json();
return response;
}
**//GET request**
const getTodo = async (id) => {
let response = await fetch('https://jsonplaceholder.typicode.com/posts/' + id);
let r = await response.json();
return r;
}
const mainFunc = async () => {
let todo = {
title: "milan7",
body: "dai7",
userID: 101
}
let todor = await createTodo(todo);
console.log(todor);
console.log(await getTodo(5));
}
mainFunc()
I think that, we don't need parse the JSON object into a string, if the remote server accepts json into they request, just run:
const request = await fetch ('/echo/json', {
headers: {
'Content-type': 'application/json'
},
method: 'POST',
body: { a: 1, b: 2 }
});
Such as the curl request
curl -v -X POST -H 'Content-Type: application/json' -d '#data.json' '/echo/json'
In case to the remote serve not accept a json file as the body, just send a dataForm:
const data = new FormData ();
data.append ('a', 1);
data.append ('b', 2);
const request = await fetch ('/echo/form', {
headers: {
'Content-type': 'application/x-www-form-urlencoded'
},
method: 'POST',
body: data
});
Such as the curl request
curl -v -X POST -H 'Content-type: application/x-www-form-urlencoded' -d '#data.txt' '/echo/form'
You only need to check if response is ok coz the call not returning anything.
var json = {
json: JSON.stringify({
a: 1,
b: 2
}),
delay: 3
};
fetch('/echo/json/', {
method: 'post',
headers: {
'Accept': 'application/json, text/plain, */*',
'Content-Type': 'application/json'
},
body: 'json=' + encodeURIComponent(JSON.stringify(json.json)) + '&delay=' + json.delay
})
.then((response) => {if(response.ok){alert("the call works ok")}})
.catch (function (error) {
console.log('Request failed', error);
});
// extend FormData for direct use of js objects
Object.defineProperties(FormData.prototype, {
load: {
value: function (d) {
for (var v in d) {
this.append(v, typeof d[v] === 'string' ? d[v] : JSON.stringify(d[v]));
}
}
}
})
var F = new FormData;
F.load({A:1,B:2});
fetch('url_target?C=3&D=blabla', {
method: "POST",
body: F
}).then( response_handler )
you can use fill-fetch, which is an extension of fetch. Simply, you can post data as below:
import { fill } from 'fill-fetch';
const fetcher = fill();
fetcher.config.timeout = 3000;
fetcher.config.maxConcurrence = 10;
fetcher.config.baseURL = 'http://www.github.com';
const res = await fetcher.post('/', { a: 1 }, {
headers: {
'bearer': '1234'
}
});