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apollo-datasource-http
Advanced tools
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Optimized HTTP Data Source for Apollo Server
View the Apollo Server documentation for data sources for more details.
To get started, install the apollo-datasource-http
package:
npm install apollo-datasource-http
To define a data source, extend the HTTPDataSource
class and implement the data fetching methods that your resolvers require. Data sources can then be provided via the dataSources
property to the ApolloServer
constructor, as demonstrated in the section below.
const server = new ApolloServer({
typeDefs,
resolvers,
dataSources: () => {
return {
moviesAPI: new MoviesAPI(),
}
},
})
Your implementation of these methods can call on convenience methods built into the HTTPDataSource class to perform HTTP requests, while making it easy to pass different options and handle errors.
import { HTTPDataSource } from "apollo-datasource-http";
const datasource = new (class MoviesAPI extends HTTPDataSource {
constructor() {
// global client options
super({
requestOptions: {
timeout: 2000,
http2: true,
headers: {
"X-Client": "client",
},
},
});
this.baseURL = "https://movies-api.example.com";
})
onCacheKeyCalculation() {}
// lifecycle hooks for logging, tracing and request, response manipulation
async onRequestError() {}
async beforeRequest() {}
async onResponse() {}
async getMovie(id) {
return this.get(`/movies/${id}`, {
headers: {
"X-Foo": "bar",
},
timeout: 3000,
});
}
}
// cancel all running requests e.g when request is closed prematurely
datasource.abort()
onCacheKeyCalculation
- Returns the cache key for request memoization.onRequestError
- Is executed only for request errors.beforeRequest
- Is executed before a request is executed.onResponse
- Is executed on a successful response.The http client throws for unsuccessful responses. Every error is rethrown to the caller. You can use the onRequestError
hook to log request errors.
FAQs
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The npm package apollo-datasource-http receives a total of 5,131 weekly downloads. As such, apollo-datasource-http popularity was classified as popular.
We found that apollo-datasource-http demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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