this is my first discussion post here. I have learned Apollo + GraphQL through Odyssey. Currently, I am building my own project using Next.js which required fetching data from 2 GraphQL endpoints.
My problem: How can I fetch data from multiple GraphQL endpoints with ApolloClient?
Below is my code for my first endpoint:
import { ApolloClient, InMemoryCache, createHttpLink } from "#apollo/client";
const client = new ApolloClient({
ssrMode: true,
link: createHttpLink({
uri: "https://api.hashnode.com/",
credentials: "same-origin",
headers: {
Authorization: process.env.HASHNODE_AUTH,
},
}),
cache: new InMemoryCache(),
});
export default client;
What you are trying to accomplish is kinda against Apollo's "One Graph" approach.
Take a look at gateways and federation - https://www.apollographql.com/docs/federation/
With that being said, some hacky solution is possible but you will need to maintain a more complex structure and specify the endpoint in every query, which undermines the built-in mechanism and might cause optimization issues.
//Declare your endpoints
const endpoint1 = new HttpLink({
uri: 'https://api.hashnode.com/graphql',
...
})
const endpoint2 = new HttpLink({
uri: 'endpoint2/graphql',
...
})
//pass them to apollo-client config
const client = new ApolloClient({
link: ApolloLink.split(
operation => operation.getContext().clientName === 'endpoint2',
endpoint2, //if above
endpoint1
)
...
})
//pass client name in query/mutation
useQuery(QUERY, {variables, context: {clientName: 'endpoint2'}})
This package seems to do what you want: https://github.com/habx/apollo-multi-endpoint-link
Also, check the discussion here: https://github.com/apollographql/apollo-client/issues/84
Encountered the same problem today. I wanted to have it dynamic so this is what I came out with:
export type DynamicLinkClientName = "aApp" | "bApp" | "graphqlApp";
type Link = RestLink | HttpLink;
type DynamicLink = { link: Link; name: DynamicLinkClientName };
const LINK_MAP: DynamicLink[] = [
{ link: aRestLink, name: "aApp" },
{ link: bAppRestLink, name: "bApp" },
{ link: graphqlAppLink, name: "graphqlApp" },
];
const isClientFromContext = (client: string) => (op: Operation) =>
op.getContext().client === client;
const DynamicApolloLink = LINK_MAP.reduce<ApolloLink | undefined>(
(prevLink, nextLink) => {
// When no name is specified, fallback to defaultLink.
if (!prevLink) {
return ApolloLink.split(
isClientFromContext(nextLink.name),
nextLink.link,
defaultLink
);
}
return ApolloLink.split(
isClientFromContext(nextLink.name),
nextLink.link,
prevLink
);
},
undefined
) as ApolloLink;
Related
I have a vuejs app that talks to multiple identical backends that are geographically separate. Each endpoint has a unique URL - example:
export const SERVICE_BASE_API_URLS = [
{ name: 'Site A', endpoint: 'http://api.a.service.com/api/v1/' },
{ name: 'Site B: 'http://api.b.service.com/api/v1' },
}
I am allowing users to select the endpoint they'd like to interact with via a select box. I'd like to set up the selected URL to be used in any further interactions globally for axios. I thought setting up Vue.Prototype.$current_endpoint would work.
So I have the onchange action of the select element store it's endpoint value in Vue.Prototype.$current_endpoint.
I have to setup an axios instance that is used by multiple endpoint classes once e.g. auth-header.js is imported by authenticate.js
import axios from 'axios';
import * as URLConstants from '../configs/urls';
export const axios_instance = axios.create({
//baseURL: URLConstants.Service_BASE_API_URL, // this was earlier set in .env. But this would be statically set for the vue instance
baseURL: Vue.prototype.current_api_endpoint
})
axios_instance.interceptors.request.use(
function(config) {
if (JSON.parse(localStorage.getItem('user')) && JSON.parse(localStorage.getItem('user')).access_token) {
const token = JSON.parse(localStorage.getItem('user')).access_token
config.headers["JWTAuthorization"] = 'Bearer ' + token;
}
return config;
},
function(error) {
return Promise.reject(error);
}
);
So later on in interact-with-service.js I have
import {
axios_instance
} from './auth-header';
import APIMixin from './mixin';
class ExpenseService extends APIMixin {
get(params) {
...
...
return axios_instance
.get("expense" + params)
.then(this.handleResponse);
}
However, I'm finding it practically impossible to set up the axios base url properly. Can someone please show me the way? :)
You can change default base url https://axios-http.com/docs/config_defaults
axios_instance.defaults.baseURL = "selected url";
The React application that I have is using location.pathname to send a request to my graphql endpoint using useQuery It means whenever I change the route, it sends a request to server to receive the new data. The issue I have is while it's in loading state I would like to keep current data so it should act kind of like Youtube when you click on a video. There should be a progress bar on top of the page and when the data is received, then I will display the fresh new data.
But after migrating from version 2 to version 3 I lost this feature. Now it redirects to new page without data and after a few sec when the data is received, it displays the new data.
How can I keep current cache state while I'm sending a request to server?
BTW I have also SSR.
Below is my setup:
server.ts
const client: ApolloClient<NormalizedCacheObject> = new ApolloClient({
ssrMode: true,
link: from([errorLink, httpLink]),
cache,
typeDefs,
ssrForceFetchDelay: 100,
});
client
const client: ApolloClient<NormalizedCacheObject> = new ApolloClient({
link: from([errorLink, httpLink]),
cache: cache.restore(apolloState || {}),
typeDefs,
});
const usePage = <T = Record<'page', Page>>(options?: Options): QueryResult<T> => {
const { pathname } = useLocation();
return useQuery<T>(getQuery(options?.fragmentName, options?.fragment), {
variables: {
pathname: options?.pathname || pathname,
},
...(options?.queryOptions || {}),
errorPolicy: 'all',
});
};
App
const App = () => {
const content = usePage();
if (content.loading) {
return <ProgressBar />;
}
if (!content) {
return <NoContent action={pageContent.refetch} />;
}
return <Page data={content.data} />
}
I figured out that there's new property called previousData so that we can keep track of the last data that is received. So that we will have something like:
const {previousData, data = previousData,} = useQuery()
data?.doSthHere
You can also check this link:
https://github.com/apollographql/apollo-client/issues/6603#issuecomment-700282431
Consider the following code within gatsby-config.js:
module.exports = {
plugins: [
{
resolve: `gatsby-source-fetch`,
options: {
name: `brands`,
type: `brands`,
url: `${dynamicURL}`, // This is the part I need to be dynamic at run/build time.
method: `get`,
axiosConfig: {
headers: { Accept: "text/csv" },
},
saveTo: `${__dirname}/src/data/brands-summary.csv`,
createNodes: false,
},
},
],
}
As you can see above, the URL for the source plugin is something that I need to be dynamic. The reason for this is that the file URL will change every time it's updated in the CMS. I need to query the CMS for that field and get its CDN URL before passing to the plugin.
I tried adding the following to the top of gatsby-config.js but I'm getting errors.
const axios = require("axios")
let dynamicURL = ""
const getBrands = async () => {
return await axios({
method: "get",
url: "https://some-proxy-url-that-returns-json-with-the-csv-file-url",
})
}
;(async () => {
const brands = await getBrands()
dynamicURL = brands.data.summary.url
})()
I'm assuming this doesn't work because the config is not waiting for the request above to resolve and therefore, all we get is a blank URL.
Is there any better way to do this? I can't simply supply the source plugin with a fixed/known URL ahead of time.
Any help greatly appreciated. I'm normally a Vue.js guy but having to work with React/Gatsby and so I'm not entirely familiar with it.
I had similar requirement where I need to set siteId of gatsby-plugin-matomo dynamically by fetching data from async api. After searching a lot of documentation of gatsby build lifecycle, I found a solution.
Here is my approach -
gatsby-config.js
module.exports = {
siteMetadata: {
...
},
plugins: {
{
resolve: 'gatsby-plugin-matomo',
options: {
siteId: '',
matomoUrl: 'MATOMO_URL',
siteUrl: 'GATSBY_SITE_URL',
dev: true
}
}
}
};
Here siteId is blank because I need to put it dynamically.
gatsby-node.js
exports.onPreInit = async ({ actions, store }) => {
const { setPluginStatus } = actions;
const state = store.getState();
const plugin = state.flattenedPlugins.find(plugin => plugin.name === "gatsby-plugin-matomo");
if (plugin) {
const matomo_site_id = await fetchMatomoSiteId('API_ENDPOINT_URL');
plugin.pluginOptions = {...plugin.pluginOptions, ...{ siteId: matomo_site_id }};
setPluginStatus({ pluginOptions: plugin.pluginOptions }, plugin);
}
};
exports.createPages = async function createPages({ actions, graphql }) {
/* Create page code */
};
onPreInit is a gatsby lifecycle method which is executing just after plugin loaded from config. onPreInit lifecycle hook has some built in methods.
store is the redux store where gatsby is storing all required information for build process.
setPluginStatus is a redux action by which plugin data can be modified in redux store of gatsby.
Here the important thing is onPreInit lifecycle hook has to be called in async way.
Hope this helps someone in future.
Another approach that may work for you is using environment variables as you said, the URL is known so, you can add them in a .env file rather than a CSV.
By default, Gatsby uses .env.development for gatsby develop and a .env.production for gatsby build command. So you will need to create two files in the root of your project.
In your .env (both and .env.development and .env.production) just add:
DYNAMIC_URL: https://yourUrl.com
Since your gatsby-config.js is rendered in your Node server, you don't need to prefix them by GATSBY_ as the ones rendered in the client-side needs. So, in your gatsby-config.js:
module.exports = {
plugins: [
{
resolve: `gatsby-source-fetch`,
options: {
name: `brands`,
type: `brands`,
url: process.env.DYNAMIC_URL, // This is the part I need to be dynamic at run/build time.
method: `get`,
axiosConfig: {
headers: { Accept: "text/csv" },
},
saveTo: `${__dirname}/src/data/brands-summary.csv`,
createNodes: false,
},
},
],
It's important to avoid tracking those files in your Git repository since you don't want to expose this type of data.
I'm trying to create a middleware for check role of my users.
// middleware/is-admin.js
export default function (context) {
let user = context.store.getters['auth/user']
if ( user.role !== 'admin' ) {
return context.redirect('/errors/403')
}
}
In my .vue file, I'm putting this on:
middleware: [ 'is-admin' ]
It works.
Now, I'd like to check if the user also has another role. So, I create a new middleware:
// middleware/is-consultant.js
export default function (context) {
let user = context.store.getters['auth/user']
if ( user.role !== 'consultant' ) {
return context.redirect('/errors/403')
}
}
And in my .vue file:
middleware: [ 'is-admin', 'is-consultant' ]
Unfortunately, when I do that, if I visit the route with an administrator role, it does not work anymore.
Can you tell me how I can create a middleware that checks multiple roles with Nuxt.js?
Thank you!
The idea is that every page has its authority level. Then in middleware you can compare your current user authority level with the current page authority level, and if it's lower redirect the user. It's very elegant solution that was proposed by Nuxt.js creator. GitHub issue.
<template>
<h1>Only an admin can see this page</h1>
</template>
<script>
export default {
middleware: 'auth',
meta: {
auth: { authority: 2 }
}
}
</script>
Then in your middleware/auth.js:
export default ({ store, route, redirect }) => {
// Check if user is connected first
if (!store.getters['user/user'].isAuthenticated) return redirect('/login')
// Get authorizations for matched routes (with children routes too)
const authorizationLevels = route.meta.map((meta) => {
if (meta.auth && typeof meta.auth.authority !== 'undefined')
return meta.auth.authority
return 0
})
// Get highest authorization level
const highestAuthority = Math.max.apply(null, authorizationLevels)
if (store.getters['user/user'].details.general.authority < highestAuthority) {
return error({
statusCode: 401,
message: 'Du måste vara admin för att besöka denna sidan.'
})
}
}
You can use this feature in Nuxt
export default function ({ $auth, redirect }) {
if (!$auth.hasScope('admin')) {
return redirect('/')
}
}
The scope can be anything you want e.g Consultant, Editor etc.
Check the documentation
Updated
Since you are using Laravel
You can have a role column in your user table
e.g
$table->enum('role', ['subscriber', 'admin', 'editor', 'consultant', 'writer'])->default('subscriber');
Then create a API resource, check the documentation for more
To create a user resource, run this artisan
php artisan make:resource UserResource
Then in your resource, you can have something like this
public function toArray($request)
{
return [
'id' => $this->id,
'name' => $this->name,
'email' => $this->email,
'phone' => $this->phone,
'gender' => $this->gender,
'country' => $this->country,
'avatar' => $this->avatar,
'role' => $this->role,
];
}
Then you can import it to your controller like this
use App\Http\Resources\UserResource;
You can get the resource like this
$userdata = new UserResource(User::find(auth()->user()->id));
return response()->json(array(
'user' => $userdata,
));
In Nuxt
To do authentication in Nuxt
Install nuxt auth and axios
Using YARN : yarn add #nuxtjs/auth #nuxtjs/axios
Or using NPM: npm install #nuxtjs/auth #nuxtjs/axios
Then register them in your nuxtconfig.js
modules: [
'#nuxtjs/axios',
'#nuxtjs/auth',
],
In your nuxtconfig.js, add this also
axios: {
baseURL: 'http://127.0.0.1:8000/api'
},
auth: {
strategies: {
local: {
endpoints: {
login: { url: '/login', method: 'post', propertyName: 'access_token' },
logout: { url: '/logout', method: 'post' },
user: { url: '/user', method: 'get', propertyName: false }
},
tokenRequired: true,
tokenType: 'Bearer',
globalToken: true
// autoFetchUser: true
}
}
}
The URL been the endpoints
Check Documentation for more
To restrict certain pages in Nuxt to Specific User.
> Create a middlweare e.g isadmin.js
Then add this
export default function ({ $auth, redirect }) {
if (!$auth.hasScope('admin')) {
return redirect('/')
}
}
Then go to the Page, add the middleware
export default {
middleware: 'isadmin'
I'm developing a Promise-based modal component which provides the possibility of specifing a component as body of the modal itself. To achieve that result, I thought that a good solution would be using a dynamic component inside the modal template.
However, inside a NUXT application, if the component refers to the Vuex instance (this.$store), it turns out to be undefined (or better there is no $store object attribute). In the same way, any injection done inside plugins results undefined (e.g. inject('api', api) create the attribute $api, but it results undefined).
If I just use the component in the 'standard' way (e.g. placing it inside the page or another component template), everything works fine.
There should be some 'extra injection' that I should do before passing the component in a programmatic way.
Can anyone help me?
The NUXT project structure (simplified):
/pages/index.vue
/plugins/api.js
/store/auth.js
/components/HelloComponent.vue
/plugins/api.js
let api = {}
api.call = function (request, auth, unpack, axios = this.axios) {
if (!request) Error('backend.js:call invalid params:', request, auth, unpack, axios)
if (auth) {
if (request.headers)
request.headers['Authorization'] = 'Bearer ' + this.auth.accessToken
else
request.headers = { 'Authorization': 'Bearer ' + this.auth.accessToken }
}
return axios(request).then((response) => unpack ? response.data : response)
}
api.getAPI = function (api, params, auth = true, unpack = true) {
if (!api) Error('api.js:getAPI invalid params:', api)
console.log('api.js:getAPI api:', api)
return this.call({ method: 'get', url: api, params: params }, auth, unpack)
}
api.postAPI = function (api, params, data, auth = true, unpack = true) {
if (!api) Error('api.js:postAPI invalid params:', api, data)
console.log('api.js:postAPI api:', api)
return this.call({ method: 'post', url: api, params: params, data: data }, auth, unpack)
}
/*******************************************************/
/* NUXT plugin and reference injection */
/*******************************************************/
export default function (context, inject) {
console.log('[CALL] api.js')
/* assign global $axios instance */
api.axios = context.$axios
/* assign auth instance to access tokens */
api.auth = context.store.state.auth
/* inject backend reference into application instance */
inject('api', api)
}
/pages/index.vue
<template>
<div>
<span>
{{ $store.auth.state.name }} // -> Displays 'Chuck'
</span>
/* Object.keys(this).includes('$store): false'; Object.keys(this).includes('$auth): true' */
<component :is="cComponent" /> // -> this.$store is undefined; auth: undefined
<hello-component /> // -> Displays 'Chuck'; auth: Object {...}
</div>
</template>
<script>
import HelloComponent from '../components/HelloComponent.vue'
export default {
components: {
HelloComponent
},
created () {
this.$store.commit('auth/setName', 'Chuck')
},
computed: {
cComponent () {
return HelloComponent
}
}
}
</script>
/components/HelloComponent.vue
<template>
<span>
{{ $store.auth.state.name }}
</span>
</template>
<script>
export default {
created() {
console.log('auth:', this.$auth)
}
}
</script>
/store/auth.js
export const state = () => ({
accessToken: null,
refreshToken: null,
name: null,
})
export const mutations = {
setAccessToken(state, token) {
console.info('auth.js:setAccessToken', token)
state.accessToken = token
},
setRefreshToken(state, token) {
console.info('auth.js:setRefreshToken', token)
state.refreshToken = token
},
setName(state, name) {
console.info('auth.js:setName', name)
state.user = name
},
}
if you have no access of this pointer in Nuxt project, And you really need to access store, then simply use
window.$nuxt.$store instead of this.$store;
Hope it will solve your problem