fix: 'Invalid Syntax : offending token '<EOF>'' when using Apollo persisted queries

[ObeyYourMaster]

(reopening of #653)
Hi, I've opened a pull request in https://github.com/graphql-java-kickstart/graphql-java-servlet as well, this fix depends on it. This pull request should fix the following issue:

When using Apollo persisted queries via angular-apollo I get the following error in browser console:
Invalid Syntax : offending token '<EOF>'

And the following in server console:
notprivacysafe.graphql.GraphQL : Query failed to parse : ''

Minimal reproduction: https://github.com/ObeyYourMaster/graphql-kickstart-spring-boot-apq-not-working-showcase

My angular setup:

package.json

{ "@apollo/client": "3.3.20", "crypto-es": "1.2.7", "apollo-angular": "2.6.0" }

ApolloClient setup:

export function createApollo(httpLink: HttpLink): ApolloClientOptions<any> { return { link: createPersistedQueryLink({ sha256: (...args) => CryptoES.SHA256(...args).toString(), }).concat(httpLink.create({ uri: environment.graphqlEndpoint, })), cache: new InMemoryCache(), defaultOptions: { query: { fetchPolicy: 'network-only' } } }; }

Used graphql-spring-boot versions:

 <dependency> <groupId>com.graphql-java-kickstart</groupId> <artifactId>graphql-kickstart-spring-boot-starter-webflux</artifactId> <version>11.1.0</version> </dependency> <dependency> <groupId>com.graphql-java-kickstart</groupId> <artifactId>graphql-kickstart-spring-boot-starter-tools</artifactId> <version>11.1.0</version> </dependency>

Please let me know your feedback/comments/thoughts in order to have the fix merged :)

[oliemansm]

Thanks @ObeyYourMaster !