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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
// Based on `graphiql.go` from https://github.com/graphql-go/handler
// only made RenderGraphiQL a public function.
package graphiql
import (
"encoding/json"
"html/template"
"net/http"
"strings"
)
// graphiqlVersion is the current version of GraphiQL
const graphiqlVersion = "0.11.11"
// graphiqlData is the page data structure of the rendered GraphiQL page
type graphiqlData struct {
GraphiqlVersion string
QueryString string
Variables string
OperationName string
AuthKey string
AuthToken string
}
func AddMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.URL.Path, "/v1/graphql") && r.Method == http.MethodGet {
renderGraphiQL(w, r)
} else {
next.ServeHTTP(w, r)
}
})
}
// renderGraphiQL renders the GraphiQL GUI
func renderGraphiQL(w http.ResponseWriter, r *http.Request) {
w.Header().Set("WWW-Authenticate", `Basic realm="Provide your key and token (as username as password respectively)"`)
user, password, authOk := r.BasicAuth()
if !authOk {
http.Error(w, "Not authorized", 401)
return
}
queryParams := r.URL.Query()
t := template.New("GraphiQL")
t, err := t.Parse(graphiqlTemplate)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Attempt to deserialize the 'variables' query key to something reasonable.
var queryVars interface{}
err = json.Unmarshal([]byte(queryParams.Get("variables")), &queryVars)
var varsString string
if err == nil {
vars, err := json.MarshalIndent(queryVars, "", " ")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
varsString = string(vars)
if varsString == "null" {
varsString = ""
}
}
// Create result string
d := graphiqlData{
GraphiqlVersion: graphiqlVersion,
QueryString: queryParams.Get("query"),
Variables: varsString,
OperationName: queryParams.Get("operationName"),
AuthKey: user,
AuthToken: password,
}
err = t.ExecuteTemplate(w, "index", d)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
// tmpl is the page template to render GraphiQL
const graphiqlTemplate = `
{{ define "index" }}
<!--
The request to this GraphQL server provided the header "Accept: text/html"
and as a result has been presented GraphiQL - an in-browser IDE for
exploring GraphQL.
If you wish to receive JSON, provide the header "Accept: application/json" or
add "&raw" to the end of the URL within a browser.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>GraphiQL</title>
<meta name="robots" content="noindex" />
<meta name="referrer" content="origin">
<style>
body {
height: 100%;
margin: 0;
overflow: hidden;
width: 100%;
}
#graphiql {
height: 100vh;
}
</style>
<link href="//cdn.jsdelivr.net/npm/graphiql@{{ .GraphiqlVersion }}/graphiql.css" rel="stylesheet" />
<script src="//cdn.jsdelivr.net/es6-promise/4.0.5/es6-promise.auto.min.js"></script>
<script src="//cdn.jsdelivr.net/fetch/0.9.0/fetch.min.js"></script>
<script src="//cdn.jsdelivr.net/react/15.4.2/react.min.js"></script>
<script src="//cdn.jsdelivr.net/react/15.4.2/react-dom.min.js"></script>
<script src="//cdn.jsdelivr.net/npm/graphiql@{{ .GraphiqlVersion }}/graphiql.min.js"></script>
</head>
<body>
<div id="graphiql">Loading...</div>
<script>
// Collect the URL parameters
var parameters = {};
window.location.search.substr(1).split('&').forEach(function (entry) {
var eq = entry.indexOf('=');
if (eq >= 0) {
parameters[decodeURIComponent(entry.slice(0, eq))] =
decodeURIComponent(entry.slice(eq + 1));
}
});
// Produce a Location query string from a parameter object.
function locationQuery(params) {
return '?' + Object.keys(params).filter(function (key) {
return Boolean(params[key]);
}).map(function (key) {
return encodeURIComponent(key) + '=' +
encodeURIComponent(params[key]);
}).join('&');
}
// Derive a fetch URL from the current URL, sans the GraphQL parameters.
var graphqlParamNames = {
query: true,
variables: true,
operationName: true
};
var otherParams = {};
for (var k in parameters) {
if (parameters.hasOwnProperty(k) && graphqlParamNames[k] !== true) {
otherParams[k] = parameters[k];
}
}
var fetchURL = locationQuery(otherParams);
// Defines a GraphQL fetcher using the fetch API.
function graphQLFetcher(graphQLParams) {
return fetch(fetchURL, {
method: 'post',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'X-API-KEY': {{ .AuthKey }},
'X-API-TOKEN': {{ .AuthToken }}
},
body: JSON.stringify(graphQLParams),
credentials: 'include',
}).then(function (response) {
return response.text();
}).then(function (responseBody) {
try {
return JSON.parse(responseBody);
} catch (error) {
return responseBody;
}
});
}
// When the query and variables string is edited, update the URL bar so
// that it can be easily shared.
function onEditQuery(newQuery) {
parameters.query = newQuery;
updateURL();
}
function onEditVariables(newVariables) {
parameters.variables = newVariables;
updateURL();
}
function onEditOperationName(newOperationName) {
parameters.operationName = newOperationName;
updateURL();
}
function updateURL() {
history.replaceState(null, null, locationQuery(parameters));
}
// Render <GraphiQL /> into the body.
ReactDOM.render(
React.createElement(GraphiQL, {
fetcher: graphQLFetcher,
onEditQuery: onEditQuery,
onEditVariables: onEditVariables,
onEditOperationName: onEditOperationName,
query: {{ .QueryString }},
response: null,
variables: {{ .Variables }},
operationName: {{ .OperationName }},
}),
document.getElementById('graphiql')
);
</script>
</body>
</html>
{{ end }}
`
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