2022-12-12 08:21:53 +00:00
2 changed files with 184 additions and 4 deletions
--- a/gql/graphiql.go
+++ b/gql/graphiql.go
@ -0,0 +1,181 @@
+package gql
+
+import (
+	"bytes"
+	"fmt"
+	"html/template"
+	"net/http"
+)
+
+// GraphiQL is an in-browser IDE for exploring GraphiQL APIs.
+// This handler returns GraphiQL when requested.
+//
+// For more information, see https://github.com/graphql/graphiql.
+
+func respond(w http.ResponseWriter, body []byte, code int) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Header().Set("X-Content-Type-Options", "nosniff")
+	w.WriteHeader(code)
+	_, _ = w.Write(body)
+}
+
+func errorJSON(msg string) []byte {
+	buf := bytes.Buffer{}
+	fmt.Fprintf(&buf, `{"error": "%s"}`, msg)
+	return buf.Bytes()
+}
+
+func PlaygroundHandler(apiUrl string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "GET" {
+			respond(w, errorJSON("only GET requests are supported"), http.StatusMethodNotAllowed)
+			return
+		}
+		w.Header().Set("Content-Type", "text/html")
+		err := page.Execute(w, map[string]interface{}{
+			"apiUrl": apiUrl,
+		})
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+// https://github.com/graphql/graphiql/blob/main/examples/graphiql-cdn/index.html
+var page = template.Must(template.New("graphiql").Parse(`
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>GraphiQL</title>
+    <style>
+      body {
+        height: 100%;
+        margin: 0;
+        width: 100%;
+        overflow: hidden;
+      }
+
+      #graphiql {
+        height: 100vh;
+      }
+    </style>
+
+    <!--
+      This GraphiQL example depends on Promise and fetch, which are available in
+      modern browsers, but can be "polyfilled" for older browsers.
+      GraphiQL itself depends on React DOM.
+      If you do not want to rely on a CDN, you can host these files locally or
+      include them directly in your favored resource bundler.
+    -->
+    <script
+      src="https://unpkg.com/react@17/umd/react.development.js"
+      integrity="sha512-Vf2xGDzpqUOEIKO+X2rgTLWPY+65++WPwCHkX2nFMu9IcstumPsf/uKKRd5prX3wOu8Q0GBylRpsDB26R6ExOg=="
+      crossorigin="anonymous"
+    ></script>
+    <script
+      src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"
+      integrity="sha512-Wr9OKCTtq1anK0hq5bY3X/AvDI5EflDSAh0mE9gma+4hl+kXdTJPKZ3TwLMBcrgUeoY0s3dq9JjhCQc7vddtFg=="
+      crossorigin="anonymous"
+    ></script>
+
+    <!--
+      These two files can be found in the npm module, however you may wish to
+      copy them directly into your environment, or perhaps include them in your
+      favored resource bundler.
+     -->
+    <link rel="stylesheet" href="https://unpkg.com/graphiql/graphiql.min.css" />
+  </head>
+
+  <body>
+    <div id="graphiql">Loading...</div>
+    <script
+      src="https://unpkg.com/graphiql/graphiql.min.js"
+      type="application/javascript"
+    ></script>
+    <script>
+      // https://github.com/graphql/graphiql/blob/main/packages/graphiql/resources/renderExample.js
+      
+      // Parse the search string to get url parameters.
+      var search = window.location.search;
+      var parameters = {};
+      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),
+            );
+          }
+        });
+      
+      // 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 onEditHeaders(newHeaders) {
+        parameters.headers = newHeaders;
+        updateURL();
+      }
+      
+      function onTabChange(tabsState) {
+        const activeTab = tabsState.tabs[tabsState.activeTabIndex];
+        parameters.query = activeTab.query;
+        parameters.variables = activeTab.variables;
+        parameters.headers = activeTab.headers;
+        updateURL();
+      }
+      
+      function updateURL() {
+        var newSearch =
+          '?' +
+          Object.keys(parameters)
+            .filter(function (key) {
+              return Boolean(parameters[key]);
+            })
+            .map(function (key) {
+              return (
+                encodeURIComponent(key) + '=' + encodeURIComponent(parameters[key])
+              );
+            })
+            .join('&');
+        history.replaceState(null, null, newSearch);
+      }
+      
+      // Render <GraphiQL /> into the body.
+      // See the README in the top level of this module to learn more about
+      // how you can customize GraphiQL by providing different values or
+      // additional child elements.
+      ReactDOM.render(
+        React.createElement(GraphiQL, {
+          fetcher: GraphiQL.createFetcher({
+            // subscriptionUrl: 'ws://localhost:8081/subscriptions',
+            url: {{.apiUrl}}
+          }),
+          query: parameters.query,
+          variables: parameters.variables,
+          headers: parameters.headers,
+          defaultHeaders: parameters.defaultHeaders,
+          onEditQuery: onEditQuery,
+          onEditVariables: onEditVariables,
+          onEditHeaders: onEditHeaders,
+          defaultEditorToolsVisibility: true,
+          isHeadersEditorEnabled: true,
+          shouldPersistHeaders: true,
+          onTabChange,
+        }),
+        document.getElementById('graphiql'),
+      );
+    </script>
+  </body>
+</html>
+`))
--- a/gql/server.go
+++ b/gql/server.go
@ -5,7 +5,6 @@ import (
 	"net/http"

 	"github.com/99designs/gqlgen/graphql/handler"
-	"github.com/99designs/gqlgen/graphql/playground"
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/go-chi/chi/v5"
@ -37,13 +36,13 @@ func Server(ctx client.Context) {
 		logFile: logFile,
 	}}))

-	router.Handle("/", playground.Handler("GraphQL playground", "/api"))
+	router.Handle("/", PlaygroundHandler("/api"))

 	if viper.GetBool("gql-playground") {
 		apiBase := viper.GetString("gql-playground-api-base")

-		router.Handle("/webui", playground.Handler("GraphQL playground", apiBase+"/api"))
-		router.Handle("/console", playground.Handler("GraphQL playground", apiBase+"/graphql"))
+		router.Handle("/webui", PlaygroundHandler(apiBase+"/api"))
+		router.Handle("/console", PlaygroundHandler(apiBase+"/graphql"))
 	}

 	router.Handle("/api", srv)