2023-06-25 20:20:59 -06:00
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package graphvent
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import (
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"net/http"
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"github.com/graphql-go/graphql"
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"github.com/graphql-go/graphql/language/parser"
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"github.com/graphql-go/graphql/language/source"
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"github.com/graphql-go/graphql/language/ast"
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"context"
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"encoding/json"
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"io"
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"reflect"
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"fmt"
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"sync"
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"github.com/gobwas/ws"
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"github.com/gobwas/ws/wsutil"
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)
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func GraphiQLHandler() func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, r * http.Request) {
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graphiql_string := fmt.Sprintf(`
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<!--
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* Copyright (c) 2021 GraphQL Contributors
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* All rights reserved.
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*
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* This source code is licensed under the license found in the
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* LICENSE file in the root directory of this source tree.
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-->
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>GraphiQL</title>
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<style>
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body {
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height: 100%%;
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margin: 0;
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width: 100%%;
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overflow: hidden;
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}
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#graphiql {
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height: 100vh;
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}
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</style>
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<!--
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This GraphiQL example depends on Promise and fetch, which are available in
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modern browsers, but can be "polyfilled" for older browsers.
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GraphiQL itself depends on React DOM.
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If you do not want to rely on a CDN, you can host these files locally or
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include them directly in your favored resource bundler.
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-->
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<script
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crossorigin
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src="https://unpkg.com/react@18/umd/react.development.js"
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></script>
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<script
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crossorigin
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src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"
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></script>
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<!--
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These two files can be found in the npm module, however you may wish to
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copy them directly into your environment, or perhaps include them in your
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favored resource bundler.
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-->
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<link rel="stylesheet" href="https://unpkg.com/graphiql/graphiql.min.css" />
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</head>
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<body>
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<div id="graphiql">Loading...</div>
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<script
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src="https://unpkg.com/graphiql/graphiql.min.js"
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type="application/javascript"
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></script>
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<script>
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const root = ReactDOM.createRoot(document.getElementById('graphiql'));
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root.render(
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React.createElement(GraphiQL, {
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fetcher: GraphiQL.createFetcher({
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url: '/gql',
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}),
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defaultEditorToolsVisibility: true,
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}),
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);
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</script>
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</body>
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</html>
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`)
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.WriteHeader(http.StatusOK)
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io.WriteString(w, graphiql_string)
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}
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}
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type GQLWSPayload struct {
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OperationName string `json:"operationName,omitempty"`
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Query string `json:"query,omitempty"`
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Variables map[string]interface{} `json:"variables,omitempty"`
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Extensions map[string]interface{} `json:"extensions,omitempty"`
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Data string `json:"data,omitempty"`
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}
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type GQLWSMsg struct {
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ID string `json:"id,omitempty"`
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Type string `json:"type"`
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Payload GQLWSPayload `json:"payload,omitempty"`
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}
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func enableCORS(w *http.ResponseWriter) {
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(*w).Header().Set("Access-Control-Allow-Origin", "*")
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(*w).Header().Set("Access-Control-Allow-Credentials", "true")
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(*w).Header().Set("Access-Control-Allow-Headers", "*")
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(*w).Header().Set("Access-Control-Allow-Methods", "*")
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}
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2023-07-09 19:33:18 -06:00
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func GQLHandler(ctx * Context, server * GQLThread) func(http.ResponseWriter, *http.Request) {
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2023-07-01 13:03:28 -06:00
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gql_ctx := context.Background()
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gql_ctx = context.WithValue(gql_ctx, "graph_context", ctx)
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gql_ctx = context.WithValue(gql_ctx, "gql_server", server)
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2023-06-25 20:20:59 -06:00
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return func(w http.ResponseWriter, r * http.Request) {
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ctx.Log.Logf("gql", "GQL REQUEST: %s", r.RemoteAddr)
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enableCORS(&w)
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header_map := map[string]interface{}{}
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for header, value := range(r.Header) {
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header_map[header] = value
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}
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ctx.Log.Logm("gql", header_map, "REQUEST_HEADERS")
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str, err := io.ReadAll(r.Body)
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if err != nil {
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ctx.Log.Logf("gql", "failed to read request body: %s", err)
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return
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}
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query := GQLWSPayload{}
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json.Unmarshal(str, &query)
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params := graphql.Params{
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Schema: ctx.GQL.Schema,
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Context: gql_ctx,
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RequestString: query.Query,
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}
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if query.OperationName != "" {
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params.OperationName = query.OperationName
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}
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if len(query.Variables) > 0 {
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params.VariableValues = query.Variables
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}
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result := graphql.Do(params)
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if len(result.Errors) > 0 {
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extra_fields := map[string]interface{}{}
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extra_fields["body"] = string(str)
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extra_fields["headers"] = r.Header
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ctx.Log.Logm("gql", extra_fields, "wrong result, unexpected errors: %v", result.Errors)
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}
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json.NewEncoder(w).Encode(result)
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}
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}
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func sendOneResultAndClose(res *graphql.Result) chan *graphql.Result {
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resultChannel := make(chan *graphql.Result)
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go func() {
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resultChannel <- res
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close(resultChannel)
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}()
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return resultChannel
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}
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func getOperationTypeOfReq(p graphql.Params) string{
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source := source.NewSource(&source.Source{
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Body: []byte(p.RequestString),
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Name: "GraphQL request",
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})
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AST, err := parser.Parse(parser.ParseParams{Source: source})
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if err != nil {
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return ""
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}
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for _, node := range AST.Definitions {
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if operationDef, ok := node.(*ast.OperationDefinition); ok {
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name := ""
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if operationDef.Name != nil {
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name = operationDef.Name.Value
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}
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if name == p.OperationName || p.OperationName == "" {
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return operationDef.Operation
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}
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}
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}
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return ""
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}
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2023-07-09 19:33:18 -06:00
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func GQLWSDo(ctx * Context, p graphql.Params) chan *graphql.Result {
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operation := getOperationTypeOfReq(p)
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ctx.Log.Logf("gqlws", "GQLWSDO_OPERATION: %s %+v", operation, p.RequestString)
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if operation == ast.OperationTypeSubscription {
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return graphql.Subscribe(p)
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}
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res := graphql.Do(p)
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return sendOneResultAndClose(res)
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}
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2023-07-09 19:33:18 -06:00
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func GQLWSHandler(ctx * Context, server * GQLThread) func(http.ResponseWriter, *http.Request) {
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2023-07-01 13:03:28 -06:00
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gql_ctx := context.Background()
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gql_ctx = context.WithValue(gql_ctx, "graph_context", ctx)
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gql_ctx = context.WithValue(gql_ctx, "gql_server", server)
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2023-06-25 20:20:59 -06:00
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return func(w http.ResponseWriter, r * http.Request) {
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ctx.Log.Logf("gqlws_new", "HANDLING %s",r.RemoteAddr)
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enableCORS(&w)
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2023-06-25 20:20:59 -06:00
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header_map := map[string]interface{}{}
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for header, value := range(r.Header) {
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header_map[header] = value
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}
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ctx.Log.Logm("gql", header_map, "REQUEST_HEADERS")
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u := ws.HTTPUpgrader{
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Protocol: func(protocol string) bool {
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ctx.Log.Logf("gqlws", "UPGRADE_PROTOCOL: %s", string(protocol))
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2023-06-25 21:00:00 -06:00
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if string(protocol) == "graphql-transport-ws" || string(protocol) == "graphql-ws" {
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return true
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}
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return false
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2023-06-25 20:20:59 -06:00
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},
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}
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conn, _, _, err := u.Upgrade(r, w)
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if err == nil {
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defer conn.Close()
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conn_state := "init"
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for {
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msg_raw, op, err := wsutil.ReadClientData(conn)
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ctx.Log.Logf("gqlws_hb", "MSG: %s\nOP: 0x%02x\nERR: %+v\n", string(msg_raw), op, err)
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msg := GQLWSMsg{}
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json.Unmarshal(msg_raw, &msg)
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if err != nil {
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ctx.Log.Logf("gqlws", "WS_CLIENT_ERROR")
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break
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}
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if msg.Type == "connection_init" {
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if conn_state != "init" {
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ctx.Log.Logf("gqlws", "WS_CLIENT_ERROR: INIT WHILE IN %s", conn_state)
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break
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}
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conn_state = "ready"
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err = wsutil.WriteServerMessage(conn, 1, []byte("{\"type\": \"connection_ack\"}"))
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if err != nil {
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ctx.Log.Logf("gqlws", "WS_SERVER_ERROR: FAILED TO SEND connection_ack")
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break
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}
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} else if msg.Type == "ping" {
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ctx.Log.Logf("gqlws_hb", "PING FROM %s", r.RemoteAddr)
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err = wsutil.WriteServerMessage(conn, 1, []byte("{\"type\": \"pong\"}"))
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if err != nil {
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ctx.Log.Logf("gqlws", "WS_SERVER_ERROR: FAILED TO SEND PONG")
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}
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} else if msg.Type == "subscribe" {
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ctx.Log.Logf("gqlws", "SUBSCRIBE: %+v", msg.Payload)
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params := graphql.Params{
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Schema: ctx.GQL.Schema,
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2023-06-25 20:20:59 -06:00
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Context: gql_ctx,
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RequestString: msg.Payload.Query,
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}
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if msg.Payload.OperationName != "" {
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params.OperationName = msg.Payload.OperationName
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}
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if len(msg.Payload.Variables) > 0 {
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params.VariableValues = msg.Payload.Variables
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}
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res_chan := GQLWSDo(ctx, params)
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2023-07-03 19:13:29 -06:00
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if res_chan == nil {
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ctx.Log.Logf("gqlws", "res_chan is nil")
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} else {
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ctx.Log.Logf("gqlws", "res_chan: %+v", res_chan)
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}
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2023-06-25 20:20:59 -06:00
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go func(res_chan chan *graphql.Result) {
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for {
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next, ok := <-res_chan
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if ok == false {
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ctx.Log.Logf("gqlws", "response channel was closed")
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return
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}
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if next == nil {
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ctx.Log.Logf("gqlws", "NIL_ON_CHANNEL")
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return
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}
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if len(next.Errors) > 0 {
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extra_fields := map[string]interface{}{}
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extra_fields["query"] = string(msg.Payload.Query)
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ctx.Log.Logm("gqlws", extra_fields, "ERROR: wrong result, unexpected errors: %+v", next.Errors)
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continue
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}
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ctx.Log.Logf("gqlws", "DATA: %+v", next.Data)
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data, err := json.Marshal(next.Data)
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if err != nil {
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ctx.Log.Logf("gqlws", "ERROR: %+v", err)
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continue
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}
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msg, err := json.Marshal(GQLWSMsg{
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ID: msg.ID,
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Type: "next",
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Payload: GQLWSPayload{
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Data: string(data),
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},
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})
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if err != nil {
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ctx.Log.Logf("gqlws", "ERROR: %+v", err)
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continue
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}
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err = wsutil.WriteServerMessage(conn, 1, msg)
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if err != nil {
|
|
|
|
|
ctx.Log.Logf("gqlws", "ERROR: %+v", err)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}(res_chan)
|
|
|
|
|
} else {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return
|
|
|
|
|
} else {
|
|
|
|
|
panic("Failed to upgrade websocket")
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
type GQLThread struct {
|
2023-07-09 19:33:18 -06:00
|
|
|
SimpleThread
|
2023-06-26 21:20:04 -06:00
|
|
|
http_server *http.Server
|
|
|
|
|
http_done *sync.WaitGroup
|
2023-07-09 19:33:18 -06:00
|
|
|
Listen string
|
2023-06-25 20:20:59 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
func (thread * GQLThread) Type() NodeType {
|
|
|
|
|
return NodeType("gql_thread")
|
2023-06-26 21:20:04 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
func (thread * GQLThread) Serialize() ([]byte, error) {
|
|
|
|
|
thread_json := NewGQLThreadJSON(thread)
|
|
|
|
|
return json.MarshalIndent(&thread_json, "", " ")
|
2023-06-26 21:20:04 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 20:30:19 -06:00
|
|
|
func (thread * GQLThread) DeserializeInfo(ctx *Context, data []byte) (ThreadInfo, error) {
|
2023-07-11 16:54:09 -06:00
|
|
|
var info ParentThreadInfo
|
2023-07-09 20:30:19 -06:00
|
|
|
err := json.Unmarshal(data, &info)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return nil, err
|
|
|
|
|
}
|
|
|
|
|
return &info, nil
|
|
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
type GQLThreadJSON struct {
|
|
|
|
|
SimpleThreadJSON
|
2023-07-01 13:06:39 -06:00
|
|
|
Listen string `json:"listen"`
|
2023-07-01 13:03:28 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
func NewGQLThreadJSON(thread *GQLThread) GQLThreadJSON {
|
|
|
|
|
thread_json := NewSimpleThreadJSON(&thread.SimpleThread)
|
|
|
|
|
|
|
|
|
|
return GQLThreadJSON{
|
|
|
|
|
SimpleThreadJSON: thread_json,
|
|
|
|
|
Listen: thread.Listen,
|
|
|
|
|
}
|
2023-07-01 13:03:28 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
func LoadGQLThread(ctx *Context, id NodeID, data []byte, nodes NodeMap) (Node, error) {
|
|
|
|
|
var j GQLThreadJSON
|
2023-07-01 13:03:28 -06:00
|
|
|
err := json.Unmarshal(data, &j)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return nil, err
|
|
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
thread := NewGQLThread(id, j.Name, j.StateName, j.Listen)
|
|
|
|
|
nodes[id] = &thread
|
|
|
|
|
|
|
|
|
|
err = RestoreSimpleThread(ctx, &thread, j.SimpleThreadJSON, nodes)
|
2023-07-01 13:03:28 -06:00
|
|
|
if err != nil {
|
|
|
|
|
return nil, err
|
|
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
return &thread, nil
|
2023-07-03 13:14:48 -06:00
|
|
|
}
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
func NewGQLThread(id NodeID, name string, state_name string, listen string) GQLThread {
|
|
|
|
|
return GQLThread{
|
2023-07-11 16:54:09 -06:00
|
|
|
SimpleThread: NewSimpleThread(id, name, state_name, reflect.TypeOf((*ParentThreadInfo)(nil)), gql_actions, gql_handlers),
|
2023-06-25 20:20:59 -06:00
|
|
|
Listen: listen,
|
2023-07-09 20:30:19 -06:00
|
|
|
http_done: &sync.WaitGroup{},
|
2023-06-25 20:20:59 -06:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
var gql_actions ThreadActions = ThreadActions{
|
2023-07-02 12:14:04 -06:00
|
|
|
"wait": ThreadWait,
|
2023-07-09 19:33:18 -06:00
|
|
|
"restore": func(ctx * Context, thread Thread) (string, error) {
|
2023-07-02 12:47:45 -06:00
|
|
|
// Start all the threads that should be "started"
|
|
|
|
|
ctx.Log.Logf("gql", "GQL_THREAD_RESTORE: %s", thread.ID())
|
2023-07-11 16:54:09 -06:00
|
|
|
ThreadRestore(ctx, thread)
|
2023-07-06 16:57:51 -06:00
|
|
|
return "start_server", nil
|
2023-07-02 12:47:45 -06:00
|
|
|
},
|
2023-07-09 19:33:18 -06:00
|
|
|
"start": func(ctx * Context, thread Thread) (string, error) {
|
2023-07-06 16:57:51 -06:00
|
|
|
ctx.Log.Logf("gql", "GQL_START")
|
|
|
|
|
err := ThreadStart(ctx, thread)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return "", err
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return "start_server", nil
|
|
|
|
|
},
|
2023-07-09 19:33:18 -06:00
|
|
|
"start_server": func(ctx * Context, thread Thread) (string, error) {
|
2023-07-02 12:14:04 -06:00
|
|
|
server, ok := thread.(*GQLThread)
|
|
|
|
|
if ok == false {
|
2023-07-06 16:57:51 -06:00
|
|
|
return "", fmt.Errorf("GQL_THREAD_START: %s is not GQLThread, %+v", thread.ID(), thread.State())
|
2023-07-02 12:14:04 -06:00
|
|
|
}
|
2023-06-26 21:20:04 -06:00
|
|
|
|
2023-07-06 16:57:51 -06:00
|
|
|
ctx.Log.Logf("gql", "GQL_START_SERVER")
|
2023-07-01 13:03:28 -06:00
|
|
|
// Serve the GQL http and ws handlers
|
2023-06-26 21:20:04 -06:00
|
|
|
mux := http.NewServeMux()
|
2023-07-01 13:03:28 -06:00
|
|
|
mux.HandleFunc("/gql", GQLHandler(ctx, server))
|
|
|
|
|
mux.HandleFunc("/gqlws", GQLWSHandler(ctx, server))
|
|
|
|
|
|
|
|
|
|
// Server a graphiql interface(TODO make configurable whether to start this)
|
2023-06-26 21:20:04 -06:00
|
|
|
mux.HandleFunc("/graphiql", GraphiQLHandler())
|
2023-07-01 13:03:28 -06:00
|
|
|
|
|
|
|
|
// Server the ./site directory to /site (TODO make configurable with better defaults)
|
2023-06-26 21:20:04 -06:00
|
|
|
fs := http.FileServer(http.Dir("./site"))
|
|
|
|
|
mux.Handle("/site/", http.StripPrefix("/site", fs))
|
|
|
|
|
|
2023-07-09 19:33:18 -06:00
|
|
|
UseStates(ctx, []Node{server}, func(nodes NodeMap)(error){
|
2023-06-26 21:20:04 -06:00
|
|
|
server.http_server = &http.Server{
|
2023-07-09 19:33:18 -06:00
|
|
|
Addr: server.Listen,
|
2023-06-26 21:20:04 -06:00
|
|
|
Handler: mux,
|
2023-06-25 20:20:59 -06:00
|
|
|
}
|
2023-06-28 00:48:49 -06:00
|
|
|
return nil
|
2023-06-26 21:20:04 -06:00
|
|
|
})
|
|
|
|
|
|
|
|
|
|
server.http_done.Add(1)
|
|
|
|
|
go func(server *GQLThread) {
|
|
|
|
|
defer server.http_done.Done()
|
|
|
|
|
err := server.http_server.ListenAndServe()
|
|
|
|
|
if err != http.ErrServerClosed {
|
|
|
|
|
panic(fmt.Sprintf("Failed to start gql server: %s", err))
|
|
|
|
|
}
|
|
|
|
|
}(server)
|
|
|
|
|
|
2023-06-25 20:20:59 -06:00
|
|
|
return "wait", nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
var gql_handlers ThreadHandlers = ThreadHandlers{
|
2023-07-09 19:33:18 -06:00
|
|
|
"child_added": func(ctx * Context, thread Thread, signal GraphSignal) (string, error) {
|
2023-06-26 21:20:04 -06:00
|
|
|
ctx.Log.Logf("gql", "GQL_THREAD_CHILD_ADDED: %+v", signal)
|
2023-07-09 19:33:18 -06:00
|
|
|
UpdateStates(ctx, []Node{thread}, func(nodes NodeMap)(error) {
|
2023-07-11 16:54:09 -06:00
|
|
|
should_run, exists := thread.ChildInfo(signal.Source()).(*ParentThreadInfo)
|
2023-06-26 21:20:04 -06:00
|
|
|
if exists == false {
|
|
|
|
|
ctx.Log.Logf("gql", "GQL_THREAD_CHILD_ADDED: tried to start %s whis is not a child")
|
2023-06-28 00:48:49 -06:00
|
|
|
return nil
|
2023-06-26 21:20:04 -06:00
|
|
|
}
|
2023-07-06 16:57:51 -06:00
|
|
|
if should_run.Start == true {
|
2023-07-09 19:33:18 -06:00
|
|
|
ChildGo(ctx, thread, thread.Child(signal.Source()), should_run.StartAction)
|
2023-06-26 21:20:04 -06:00
|
|
|
}
|
2023-06-28 00:48:49 -06:00
|
|
|
return nil
|
2023-06-26 21:20:04 -06:00
|
|
|
})
|
|
|
|
|
return "wait", nil
|
|
|
|
|
},
|
2023-07-09 19:33:18 -06:00
|
|
|
"abort": func(ctx * Context, thread Thread, signal GraphSignal) (string, error) {
|
2023-06-26 21:20:04 -06:00
|
|
|
ctx.Log.Logf("gql", "GQL_ABORT")
|
|
|
|
|
server := thread.(*GQLThread)
|
|
|
|
|
server.http_server.Shutdown(context.TODO())
|
|
|
|
|
server.http_done.Wait()
|
2023-07-09 20:30:19 -06:00
|
|
|
return ThreadAbort(ctx, thread, signal)
|
2023-06-26 21:20:04 -06:00
|
|
|
},
|
2023-07-09 19:33:18 -06:00
|
|
|
"cancel": func(ctx * Context, thread Thread, signal GraphSignal) (string, error) {
|
2023-06-26 21:20:04 -06:00
|
|
|
ctx.Log.Logf("gql", "GQL_CANCEL")
|
|
|
|
|
server := thread.(*GQLThread)
|
|
|
|
|
server.http_server.Shutdown(context.TODO())
|
|
|
|
|
server.http_done.Wait()
|
2023-07-09 20:30:19 -06:00
|
|
|
return ThreadCancel(ctx, thread, signal)
|
2023-06-26 21:20:04 -06:00
|
|
|
},
|
2023-06-25 20:20:59 -06:00
|
|
|
}
|
|
|
|
|
|
