I am trying to set up a simple endpoint in SvelteKit that reads the input given in a form and returns the result of an SQL query. In my first attempt I used the form actions and wrote the following code in the +page.server.js file:
export const actions = {
default: async (event) => {
let form_input = await event.request.formData();
let query = {
text: "select * from ux_return_shipments($1, $2, $3, $4)",
values: [form_input.get('beg-dep-date') || null, form_input.get('end-dep-date') || null, form_input.get('beg-arr-date') || null, form_input.get('end-arr-date') || null
}
try {
const result = await event.locals.pool.query(query);
return result.rows;
} catch (e) {
console.log(e);
}
}
};
I am now trying to set up the same process using a GET request instead of a POST one but I am having difficulties setting up the endpoint. I tried to replace the above code with this template but it looks like the endpoint is not getting activated since I see no activity server side:
export function GET({ url }) {
console.log(url);
return new Response("Test response");
};
What am I doing wrong? I see that using this code for an API endpoint (+server.js file) works correctly. I also checked the form element and the URL looks correct.
In case someone has the same problem I managed to solve it using this template:
export const load = async (event) => {
return ...
};
Using the load function I was able to set up a get endpoint and pass some data to the frontend using a return.
I am trying to add a dynamic route to the api folder for GET request.
In this scenario it works fine
api/[product]
const baseUrl ='https://myUrl'
const { product } = req.query
const url = `${baseUrl}/${product}`
And then testing http://localhost:3000/api/phone in Postman returns the correct result. So far it is fine.
Then, instead of fetching the api by product, I want my dynamic property to be filter values. Filter syntax provided by particular api looks like this ?$filter=name eq 'Milk'.
Filtering on frontend works fine when I test it in postman or in browser.
https://myUrl/phone?$filter=name eq 'iphone'
Now I try to do exactly the same as above, now in api folder. But it returns 404 This page could not be found..
api/[productType]
const baseUrl ='https://myUrl/phone?$filter'
const { productType } = req.query
const url = `${baseUrl}=${productType}`
In Postman I test it so:
`http://localhost:3000/api/phone=name-eq-'iphone'`
And get 404 response.
How to fix this issue? Any help will be appreciated.
I have created a demo at https://github.com/vercel-support/so-71663454-nextjs-route-poc with
// /api/[productType]
export default function handler (req, res) {
const baseUrl ='https://myUrl/phone?$filter'
const { productType } = req.query
const url = `${baseUrl}=${productType}`
res.json({ productType, query: req.query, url })
}
If you visit the link using https://so-71663454-nextjs-route-poc.vercel-support.app/api/phone=name-eq-'iphone'
You should be able to see the following result:
{
"productType": "phone=name-eq-'iphone'",
"query": {
"productType": "phone=name-eq-'iphone'"
},
"url": "https://myUrl/phone?$filter=phone=name-eq-'iphone'"
}
I am trying to make the following call in React using axios:
axios.get(`http://localhost:5000/daily_batches/num_tweets_by_tag_and_date/`, {
params: {
tag: "Green/Sustainable Energy",
date: "2021-05-07"
}
})
.then(res => {
console.log(res)
})
Should I use req.params, req.body or req.query in my express route for the axios call to be successful? If I use req.params, like so:
router.route('/num_tweets_by_tag_and_date/').get(async (req, res) => {
try {
const tag = req.params.tag;
const date = req.params.date;
const tag_num_tweets_field = "tags." + tag + ".num_tweets"
const num_tweets_data = await DailyBatch.findOne({"date": date}, {[tag_num_tweets_field]: 1, "_id": 0});
res.json(num_tweets_data)
} catch (err) {
console.log(err)
res.status(400).json({
errors: {
global: "An error occurred."
}
})
}
});
I get a "data:null" as shown in this screenshot. And indeed by doing console.log(req.params.tag) and console.log(req.params.date) in the route I get "undefined"
If I use req.body.tag and req.body.date instead of req.params.tag and req.params.date, I still get "undefined" when I console.log(date) and console.log(tag). And the api response is still "data:null". However, in Insomnia the api call works just fine and returns the expected data, as shown in the pic below:
If I use req.query.date and req.query.tag, I successfully get the data in the axios api call I make in React. However, the call does not work in Insomnia, where I get "null".
I cannot seem to find a way to make the get call in React using axios and passing a dictionary with the call parameters, while at the same time being able to make calls to the same endpoint in Insomnia. The only way I found is to use req.param("tag") and req.param("date") but apparently it's deprecated and so I would not want to use that.
I have read multiple posts about req.params, req.body and req.query but the more I read about this the more I am getting confused. Any help would be appreciated!
Probably req.body.
req.params is used if you set up your route using variables, such as
router.get('/users/:id', (req, res)=>{})
you can console.log(req.body) to check.
req.params is used when you have dynamic route .
Example= /:num_tweets_by_tag_and_delete
check here: Node.js: req.params vs req.body
I am writing a service for all my RestApis where I store RestApis and then use it when I need by calling methods.
RestApiService.js
let getData = 'https://myURL?id=123456';
export const getIndividualUsers = (resourceId) => {
const queryParams = {
userId: resourceId
};
queryParams.authorization = sessionStorage.getItem("authorization");
}
Object.keys(queryParams).forEach((k) => {
queryParams[k] = (typeof (queryParams[k]) !== 'string') ? JSON.stringify(queryParams[k]) : queryParams[k];
});
return getData.get('', queryParams);
};
I call this method when I need data using the method name and use the response in my code:
getIndividualUsers(123456).then((response));
Now one of my API has variable in the middle of the URL such as
URL: 'https://myURL/${variable}/children/12'
How do I pass queryParams(variable) in the middle of the Url? I will have variable value when I call the method that fetches the URL and not while defining the the URL.
Which library are you using? Anyway you can do like below always.
const getChild = (parentName, id) => {
let url = `https://myURL/${parentName}/children/${id}`;
...
};
I'm trying to use Google Cloud Print(GCP) API, but I can't make it works.
Maybe I've understood bad the workflow because is the first time I'm using the google api, please help me to understand how to make it works.
Initial considerations:
I'm trying to implement it in reactJS, but It is indifferent because the logic to make GCP works is independent of the technology. Then you also can help me understand the workflow.
What exactly I want:
To make my first test, I am looking to get all information about my printer.
What I did:
I created a project in: https://console.developers.google.com
Inside the project created, I created a credential:
create credentials -> OAuth client ID
And I chose Application type: Web, and also configure the restrictions to source and redirection to my localhost.
Manually in https://www.google.com/cloudprint, I added my printer, I made a test printing a PDF and was OK.
I created a project in reactJS to get the information of my printer I've added.
Component:
Explanation:
I'm using a component react-google-login to obtain easily the user accessToken: https://github.com/anthonyjgrove/react-google-login
This component only obtains the access token and save it in localStorage, in a variable called googleToken and it draws a button to call a function to obtain the information about the printer.
code:
import React, { Component } from 'react'
import GoogleLogin from 'react-google-login';
import { connect } from 'react-redux'
import { getPrinters } from '../actions/settings'
class Setting extends Component {
responseGoogle(response) {
const accessToken = response.accessToken
localStorage.setItem('googleToken', accessToken)
}
render() {
return (
<div>
<GoogleLogin
clientId="CLIENT_ID_REMOVED_INTENTIONALLY.apps.googleusercontent.com"
buttonText="Login"
onSuccess={this.responseGoogle}
onFailure={this.responseGoogle}
/>
<button
onClick = {() => {
this.props.getPrinters()
}}
>test printer</button>
</div>
)
}
}
const mapStateToProps = state => {
return {
state: state
}
}
const mapDispatchToProps = dispatch => {
return {
getPrinters() {
dispatch(getPrinters())
}
}
}
export default connect(
mapStateToProps,
mapDispatchToProps
)(Setting)
Action or Function to get information printer:
Explanation:
I'm passing the parameter printerid to get information about that printer.
In authorization, I'm using OAuth ... because in the documentation says that(second paragraph).: https://developers.google.com/cloud-print/docs/appInterfaces
The next two headers I wrote it because I tried solutions as:
Google Cloud Print API: User credentials required
Google Cloud Print User credentials required
code:
import axios from 'axios'
axios.defaults.headers.common['Authorization'] = 'OAuth ' + localStorage.getItem('googleToken')
axios.defaults.headers.common['scope'] = 'https://www.googleapis.com/auth/cloudprint'
axios.defaults.headers.common['X-CloudPrint-Proxy'] = 'printingTest'
const getPrinters = () => {
return () => {
return axios.get('https://www.google.com/cloudprint/printer'
, {
params: {
printeid: 'PRINTER_ID_REMOVED_INTENTIONALLY'
}
}
)
.then(response => {
console.log('response of google cloud print')
console.log(response)
})
}
}
export { getPrinters }
Error:
After all explained before, I got the next error:
User credentials required
Error 403
Note:
I'm using CORS plugin by recommendation of:
Chrome extensions for silent print?
because initially, I had cors error.
Any suggestion or recommendation would be very useful, thanks.
I've resolved my problem, my main problem about User Credential required were because I was using the incorrect access token and It was because I was getting the access token incorrectly.
I'm going to explain my whole solution because there are few examples of codes with this API.
Solutions:
The steps described were Ok until the fourth step where I used the external component react-google-login to trying to get the access token, instead I used googleapis module: Link Github googleapis
Also to avoid CORS problem(and not use CORS chrome plugin) I wrote the requests to Google API in server side.(NODEJS)
I had also a problem in the frontend when I tried to generate a popup to give permission for printer(problems about CORS), my solution was to use this very simple module for authentication: Link Github oauth-open
General scheme:
Explanation:
Knowing I have all data described in my question post(until the third step).
Authentication:
The next step in getting a URL and use it to the user can authenticate.
As I said before I used the module oauth-open in the frontend to generate the popup and only this module need the URL. To get the URL in the backend I used the endpoint /googleurl, where here I used the method generateAuthUrl of the module googleapis to generate the URL.
After that In the frontend, I got the authentication_code(that returned the module oauth-open), I send It to my endpoint /googletoken and here I process the authentication_code to generate access token, refresh token and expiration date with the method getToken of the module googleapis. Finally, these data are stored in the database.
Print:
For print, since the frontend, I send what data I need send to the printer. I used my endpoint /print
In the backend endpoint, my logic was the next:
Recover tokens and expiration date from database, with the expiration date check if the token has expired, and if It has already expired then gets another token and replace the old access token with the new one, replacing also with the new expiration date, to obtain this new data only is necessary call to method refreshAccessToken of module googleapis.Note: the refresh token never expires.
After having the access token updated, use it to send data to the printer with Google route(.../submit)
Code:
All the next codes are in only 1 file
Some data as validation, static variables, error handler, etc, has been removed to better understanding.
Route get URL authentication.
const express = require('express');
const google = require('googleapis');
const router = express.Router();
var OAuth2 = google.auth.OAuth2;
const redirect_url = 'http://localhost:3001/setting'; //Your redirect URL
var oauth2Client = new OAuth2(
'CLIENT ID', //Replace it with your client id
'CLIEND SECRET', //Replace it with your client secret
redirect_url
);
var url = oauth2Client.generateAuthUrl({
access_type: 'offline',
scope: 'https://www.googleapis.com/auth/cloudprint'
});
router.get('/googleurl', (req, res) => {
return res.status(200).send({
result: { googleURLToken: url }
});
});
To get tokens using the authentication code and save these in the database.
const Setting = require('../models/setting'); // My model(Mongoose)
router.post('/googletoken', (req, res) => {
oauth2Client.getToken(req.body.code, function (err, tokens) {
oauth2Client.credentials = tokens;
// If refresh token exits save it
// because the refresh token it returned only 1 time! IMPORTANT
if (tokens.hasOwnProperty('refresh_token')) {
let setting = new Setting();
setting.refreshTokenGoogle = tokens.refresh_token;
setting.expirationTokenGoogle = tokens.expiry_date;
setting.tokenGoogle = tokens.access_token;
setting.save()
.then((settingCreated) => {
return res.status(200).send({
message: 'OK'
});
})
}
});
});
To print
const axios = require('axios');
const moment = require('moment');
router.post('/print',async (req, res) => {
const tickeProperties = {
'version': '1.0',
'print': {
'vendor_ticket_item': [],
'color': { 'type': 'STANDARD_MONOCHROME' },
'copies': { 'copies': 1 }
}
};
const accessToken = await getTokenGoogleUpdated();
axios.get(
'https://www.google.com/cloudprint/submit',
{
params: {
printerid : printerID, // Replace by your printer ID
title: 'title printer',
ticket: tickeProperties,
content : 'print this text of example!!!',
contentType: 'text/plain'
},
headers: {
'Authorization': 'Bearer ' + accessToken
}
}
)
.then(response => {
return res.status(200).send({
result: response.data
});
})
}
);
async function getTokenGoogleUpdated() {
return await Setting.find({})
.then(async setting => {
const refreshTokenGoogle = setting[0].refreshTokenGoogle;
const expirationTokenGoogle = setting[0].expirationTokenGoogle;
const tokenGoogle = setting[0].tokenGoogle;
const dateToday = new Date();
// 1 minute forward to avoid exact time
const dateTodayPlus1Minute = moment(dateToday).add(1, 'm').toDate();
const dateExpiration = new Date(expirationTokenGoogle);
// Case date expiration, get new token
if (dateExpiration < dateTodayPlus1Minute) {
console.log('Updating access token');
oauth2Client.credentials['refresh_token'] = refreshTokenGoogle;
return await oauth2Client.refreshAccessToken( async function(err, tokens) {
// Save new token and new expiration
setting[0].expirationTokenGoogle = tokens.expiry_date;
setting[0].tokenGoogle = tokens.access_token;
await setting[0].save();
return tokens.access_token;
});
} else {
console.log('Using old access token');
return tokenGoogle;
}
})
.catch(err => {
console.log(err);
});
}
I hope It helps you if you want to use Google Cloud Print to not waste a lot of time as I did.
The important part there is a scope https://www.googleapis.com/auth/cloudprint which is not obvious and took one day for me to figure out.