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server.go
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server.go
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package main
import (
"log"
"net/http"
"github.com/graph-gophers/graphql-go/relay"
"github.com/OwlLaboratory/graphql_mongodb_golang_server/graph"
"github.com/OwlLaboratory/graphql_mongodb_golang_server/DB"
)
func main() {
graph.RegisterNodes()
defer DB.Session.CloseSession()
http.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write(page)
}))
http.Handle("/query", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Handle CORS
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("Access-Control-Allow-Methods", "POST,OPTIONS")
w.Header().Set( "Accept", "application/json")
w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Range, Content-Disposition, Content-Type")
// Handle OPTIONS for preflight request / Angular app
if r.Method == "OPTIONS" {
return
}
handlerScheme := relay.Handler{Schema: graph.GQLSchema}
handlerScheme.ServeHTTP(w, r)
}))
log.Fatal(http.ListenAndServe(":8080", nil))
}
var page = []byte(`
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.10.2/graphiql.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/fetch/1.1.0/fetch.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.5.4/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.5.4/react-dom.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.10.2/graphiql.js"></script>
</head>
<body style="width: 100%; height: 100%; margin: 0; overflow: hidden;">
<div id="graphiql" style="height: 100vh;">Loading...</div>
<script>
function graphQLFetcher(graphQLParams) {
return fetch("/query", {
method: "post",
body: JSON.stringify(graphQLParams),
credentials: "include",
}).then(function (response) {
return response.text();
}).then(function (responseBody) {
try {
return JSON.parse(responseBody);
} catch (error) {
return responseBody;
}
});
}
ReactDOM.render(
React.createElement(GraphiQL, {fetcher: graphQLFetcher}),
document.getElementById("graphiql")
);
</script>
</body>
</html>
`)