If I do curl, the server returns an array of posts objects, like this:
curl http://localhost/api/posts/
[
{
"id": 7,
"target": {
"body": "This is the body",
"title": "Airbnb raising a reported $850M at a $30B valuation",
"user": {
"first_name": "ben",
"last_name": "jamin"
}
}
},
{
"id": 11,
"target": {
"body": "This is the body",
"title": "Browsing the APISSS",
"user": {
"first_name": "user",
"last_name": "two"
}
}
}
]
I tried getting this using the fetch api:
fromServer() {
console.log('fromServer')
var headers = new Headers();
headers.append('Accept', 'application/json');
let a = fetch('http://test.com/api/posts/', headers)
.then(function(response) {
if (response.status !== 200) {
console.log('There was a problem. Status Code: ' + response.status);
return;
}
response.json().then(function(data) {
console.log(data);
});
}
)
.catch(function(err) {
console.log('Fetch Error :-S', err);
});
}
But I am getting this error:
Unexpected token < in JSON at position 0
SyntaxError: Unexpected token < in JSON at position 0
How can I solve this problem? Could you please help me. Thank you.
It is clear that you have some syntax error while parsing response into json object.
Remove all the comments from server json file if any.
If it is not:
I believe the response body is not json.
You're receiving HTML (or XML) back from the server, but code is enable to parse as JSON.
Check the "Network" tab in Chrome dev tools to see contents of the server's response.
Or debug using this code: (as "Jaromanda X" said)
.then(function(response) {
console.log(response);
console.log(response.status);
console.log(response.json());
console.log(response.text());
})
.catch(function(err) {
console.log('Fetch Error :-S', err);
});
You can try adding the dataType property,just like dataType: 'html' or dataType: 'text'
Please check that your server is giving response in JSON format only. It should not be a string.
For Associative data you should start your JSON object with { not [ .
So your data should be in below format:
{
"data": [
{
"id": 7,
"target": {
"body": "This is the body",
"title": "Airbnb raising a reported $850M at a $30B valuation",
"user": {
"first_name": "ben",
"last_name": "jamin"
}
}
},
{
"id": 11,
"target": {
"body": "This is the body",
"title": "Browsing the APISSS",
"user": {
"first_name": "user",
"last_name": "two"
}
}
}
]
}
And you can get all data from response.data .
For more detail follow this link .
The wording of the error message corresponds to what you get from Google Chrome when you run JSON.parse('<...'). I know you said the server is setting Content-Type:application/json, but I am led to believe the response body is actually HTML.
"SyntaxError: Unexpected token < in JSON at position 0"
with the line console.error(this.props.url, status, err.toString()) underlined.
The err was actually thrown within jQuery, and passed to you as a variable err. The reason that line is underlined is simply because that is where you are logging it.
I would suggest that you add to your logging. Looking at the actual xhr (XMLHttpRequest) properties to learn more about the response. Try adding console.warn(xhr.responseText) and you will most likely see the HTML that is being received.
Please correct your code according to above explanation.
so, you can use with start JSON array ;
{
"array": [
{
"id": 7,
"target": {
"body": "This is the body",
"title": "Airbnb raising a reported $850M at a $30B valuation",
"user": {
"first_name": "ben",
"last_name": "jamin"
}
}
},
{
"id": 11,
"target": {
"body": "This is the body",
"title": "Browsing the APISSS",
"user": {
"first_name": "user",
"last_name": "two"
}
}
}
]
}
So the problem was this: Since I was testing it from the vagrant machine in LAN and in my hosts file I added the ip of vagrant machine as the url (test.com), the device was not able to fetch to that url. After I changed the vagrant machine to port forward and gave the original IP address of the machine, I was able to fetch the json objects. Thank you all for your help.
In my case, the port I was trying to use was already in use. I solved this issue by executing the follwing command in the command prompt in order to terminate the port.
taskkill /F /IM node.exe
Related
Trying to make a simple patch request against a single document, and the request returns
{
"acknowledged": true,
"modifiedCount": 1,
"upsertedId": null,
"upsertedCount": 0,
"matchedCount": 1
}
This is the document I am trying to update
{
"_id": "63843e60079d9cdf9c26505a",
"name": "AKG_HSD271",
"image": "images/Products/AKG_hsd271.png",
"colour": "Black",
"description": "AKG HSD271 over-ear headset",
"price": "165.99",
"startingDateAvailable": "2022-05-10T15:23:28.000Z",
"type": "Over-Ear",
"isOnSale": false,
"stock": 46,
"EndingDateAvailable": "N/A",
"manufacturer": "AKG",
"updatedAt": "2022-12-03T08:48:35.302Z"
}
This is the request body I am sending (via Postman)
{
"price": "100.99"
}
And here is the code for my route handler
router.patch('/Products/:id', (req, res) => {
console.log('/Products/'+req.params.id);
const updates = req.body;
Product.updateOne({_id: ObjectId(req.params.id)}, {$set: updates})
.then(result => {
console.log(result);
res.json(result);
})
.catch(err => {
res.status(500).send(err.message);
});
});
Can't for the love of me figure out what is going wrong and why the price field won't change, and can't find any threads that have a suggestion I haven't tried. Any ideas?
Found the problem. Including the built in json() function in express before my route handlers seemed to do the trick:
router.use(express.json())
Apparently in express, the body property does not exist on the req object unless you include the json middleware. Hope this helps others.
I have to make a POST request, to an API that was given to me.
I am supposed to send some data to it and get back an JWT token.
The data i have to send is an object called data like this:
{
"firstName": "Jane",
"address": "Lohmühlenstraße 65",
"numberOfChildren": 2,
"occupation": "EMPLOYED",
"email": "jane.doe#getpopsure.com"
}
And the API docu looks like this:
curl https://challenge-dot-popsure-204813.appspot.com/user \
-H 'Content-Type: application/json' \
-d '{"firstName":"Jane","address":"Lohmühlenstraße 65","numberOfChildren":2,"occupation":"EMPLOYED","email":"jane.doe#getpopsure.com"}' \
-X POST
I am sending with axios a POST request, with an object, but i get an 422 Error:
Failed to load resource: the server responded with a status of 422 ()
This is my POST request, where data is the object above:
axios.post('https://challenge-dot-popsure-204813.appspot.com/user', data)
.then(function (response) {
debugger
console.log(response);
})
.catch(function (error) {
console.log(error);
});
Any ideas what can be the issue?
I was able to reproduce the 422 error by removing or invalidating the JSON data. For instance remove/rename the "firstName" property.
Example:
{
"name": "Jane",
"address": "Lohmühlenstraße 65",
"numberOfChildren": 2,
"occupation": "EMPLOYED",
"email": "jane.doe#getpopsure.com"
}
Resulted In: 422 Unprocessable Entity
{
"errors": {
"firstName": [
"Missing data for required field."
],
"name": [
"Unknown field."
]
}
}
Plunker
I think the issue you are facing is that the data you are expecting is not all there when you make the axios.post resulting in the error you are seeing. Make sure that the data sent in the request contains all valid fields and values beforehand.
I would like to make a request to "Mailjet" API from a react app. To do so, I would like to use fetch API.
According to the documentation, I can use curl :
curl -s \
-X POST \
--user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
https://api.mailjet.com/v3.1/send \
-H 'Content-Type: application/json' \
-d '{
"Messages":[
{
"From": {
"Email": "toto#toto.fr",
"Name": "toto"
},
"To": [
{
"Email": "passenger1#example.com",
"Name": "passenger 1"
}
],
"TemplateID": 1074249,
"TemplateLanguage": true,
"Subject": "Hi there !",
"Variables": {}
}
]
}'
I tried with fetch the following code :
fetch('https://api.mailjet.com/v3.1/send',{
method : 'POST',
mode : 'no-cors',
headers : {
'Content-Type': 'application/json',
'client_id':'xxx111',
'client_secret':'xxx000'
},
body : {
"Messages":[
{
"From": {
"Email": "toto#toto.fr",
"Name": "Toto"
},
"To": [
{
"Email": "email#email.com"
}
],
"TemplateID": 1094249,
"TemplateLanguage": true,
"Subject": "Hi there",
"Variables": {
}
}
]
}
})
.then(resp=>resp.json())
.then(data => {
console.log('data mailjet', data);
})
.catch(err => err)
I always got a 401 error "not authorized". I am sure my API keys are not set properly, but I don't really know how I can set them with fetch.
Can I make this API call from my react-app or do I need to create my own API and request the resources with node?
Thanks a lot!!
Regarding Mailjet - use the node integration they provide ;)
import mailjet from 'node-mailjet';
Regarding fetch - add your token in your header, depending on what kind of token the API expects. This will differ whether with each API and wether your doing frontend or backend calls.
With Node, save the token as a environment variable and then inject into the Authorization header.
The API key & secret need to be added as a Basic auth header and base64-encoded (use any lib you'd like in Node)
const encoded = base64.encode(`${apiKey}:${apiSecret}`)
fetch('https://api.mailjet.com/v3.1/send', {
headers: {
Authorization: `Basic ${encoded}`
}
})
Docs: https://dev.mailjet.com/sms/reference/overview/authentication/
I have created an Azure function to save data in SQL database from Iot Hub that is working fine, Now I want to save Exception and Error to Azure storage Table so for that I have added try{ } catch(err){} but that is not working. please correct me. Thanks!
my function is here
module.exports = function (context, iotHubMessage) {
try {
var strMsg = JSON.stringify(iotHubMessage);
context.log('Message received: ' + strMsg);
var ob1 = { "employee_idw": 444, "last_name": "Teller", "first_name": "Saara", "age": 34, "salary": 87000 };
//I misspelled 'employee_idw' to generate error
var ob2 = { "employee_id": 555, "last_name": "Teller", "first_name": "Saara", "age": 31, "salary": 87000 };
ob1.EventProcessedUtcTime = new Date;
ob2.EventProcessedUtcTime = new Date;
var arr = [];
arr.push(ob1);
arr.push(ob2);
context.bindings.outputTable = arr;
context.done();
} catch (err) {
context.log('CCC Error' + err); // even can not see this message in log
context.bindings.error= { "partitionKey": partitionKey, "rowKey": rowKey, "data": err };
}
};
see this is JSON file
{
"bindings": [
{
"type": "eventHubTrigger",
"name": "myEventHubMessage",
"path": "myeventhub",
"consumerGroup": "$Default",
"connection": "PBCorIOTHub_events_IOTHUB",
"cardinality": "many",
"direction": "in"
},
{
"type": "apiHubTable",
"name": "outputTable",
"dataSetName": "default",
"tableName": "employees",
"connection": "sql_SQL",
"direction": "out"
},
{
"type": "table",
"name": "error",
"tableName": "dddtTest",
"connection": "cccteststr_STORAGE",
"direction": "out"
}
],
"disabled": false
}
Are you using Azure SQL or Azure table storage to store the data? From your code it looks like you are using Azure table storage. The reason i ask is because a changed property name would not cause an error in function. Instead the table storage would create a new property with misspelled name.
Like Mikhail suggested the to store an error caused inside of a function all you have to do is create another output binding and assign the exception to it.
However not all exceptions occur inside of a function context. For example an error in function.json configuration could cause a error connecting to storage. This would cause function execution to fail outside of function code context. Azure functions has direct integration with Application Insights and can help monitor what you are looking for. Here is a blog post that can shows how to configure Application Insights.
https://blogs.msdn.microsoft.com/appserviceteam/2017/04/06/azure-functions-application-insights/
I already have declared my datasource ,my model and the connector between these.
My model
{
"name": "container",
"base": "Model",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {},
"validations": [],
"relations": {},
"acls": [],
"methods": {}
}
Datasource
"storage": {
"name": "storage",
"connector": "loopback-component-storage",
"provider": "filesystem",
"root": "./server/storage"
}
My provider
{
"filesystem": {
"root": "./server/storage"
}
}
And the Connector
"container": {
"dataSource": "storage",
"public": true
}
I try posting a object like {"Object":"container1"} into path "./server/storage" but I get the following error from callback.
{
"error": {
"statusCode": 500,
"name": "TypeError",
"message": "Path must be a string. Received undefined",
"stack": "TypeError: Path must be a string. Received undefined.."
}
}
Please who can help me to find my issue? Thanks!
You can also use "name" instead of "Object" as key in your JSON object to create a new container/directory using the API.
POST /api/containers {"name":"container1"}
The way to post a container is, without using the loopback api. Create a folder that is gonna be the container into your provider path (being filesystem).
As simple as that!
If you need a programmatic way to add new containers, let's say for example you want to create a filesystem of sorts for new users. You can use the route below. "Container" is the name I called my Model, you can call yours whatever you'd like.
POST localhost:3000/api/container
Inside the body of the post request you have to have an attribute name and the value of the name can be the new container you're creating. The Strongloop/Loopback documentation, which can be found here, is not accurate and neither is the error you get back when you try to post it with their directions.
"error": {
"statusCode": 500,
"name": "TypeError",
"message": "Path must be a string. Received undefined"
}
An excerpt of the code to send a post request to create a new container is also below.
var request = require("request");
var options = {
method: 'POST',
url: 'http://localhost:3000/api/containers',
body: { name: 'someNewContainer' },
json: true
};
request(options, function (error, response, body) {
if (error) throw new Error(error);
console.log(body);
});