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graphql-koa
Advanced tools
This is just a simple conversion of express-graphql for Koa. This package has not been thoroughly tested. We are actively looking for contributors to help with testing.
Create a GraphQL HTTP server with Koa.
npm install --save graphql-koa
Install graphql-koa as middleware in your koa server:
var graphqlHTTP = require('graphql-koa');
var app = koa();
app.use('/graphql', graphqlHTTP({ schema: MyGraphQLSchema }));
The graphqlHTTP
function accepts the following options:
schema
: A GraphQLSchema
instance from graphql-js
.
A schema
must be provided.
rootValue
: A value to pass as the rootValue to the graphql()
function from graphql-js
.
pretty
: If true
, any JSON response will be pretty-printed.
Once installed at a path, graphql-koa
will accept requests with
the parameters:
query
: A string GraphQL document to be executed.
variables
: The runtime values to use for any GraphQL query variables
as a JSON object.
operationName
: If the provided query
contains multiple named
operations, this specifies which operation should be executed. If not
provided, an 400 error will be returned if the query
contains multiple
named operations.
GraphQL will first look for each parameter in the URL's query-string:
/graphql?query=query+getUser($id:ID){user(id:$id){name}}&variables={"id":"4"}
If not found in the query-string, it will look in the POST request body.
If a previous middleware has already parsed the POST body, the request.body
value will be used.
If the POST body has not yet been parsed, graphql-koa will interpret it depending on the provided Content-Type header.
application/json
: the POST body will be parsed as a JSON
object of parameters.
application/x-www-form-urlencoded
: this POST body will be
parsed as a url-encoded string of key-value pairs.
application/graphql
: The POST body will be parsed as GraphQL
query string, which provides the query
parameter.
FAQs
Create a GraphQL HTTP server with Express.
We found that graphql-koa 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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