1005 lines
28 KiB
Go
1005 lines
28 KiB
Go
package graphvent
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import (
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"time"
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"net"
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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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"strings"
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"crypto/ecdh"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/x509"
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"crypto/tls"
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"crypto/x509/pkix"
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"math/big"
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"encoding/pem"
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"github.com/google/uuid"
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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 GQLPayload 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 GQLPayload `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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type GQLUnauthorized string
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func (e GQLUnauthorized) Is(target error) bool {
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error_type := reflect.TypeOf(GQLUnauthorized(""))
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target_type := reflect.TypeOf(target)
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return error_type == target_type
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}
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func (e GQLUnauthorized) Error() string {
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return fmt.Sprintf("GQL_UNAUTHORIZED_ERROR: %s", string(e))
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}
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func (e GQLUnauthorized) MarshalJSON() ([]byte, error) {
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return json.MarshalIndent(&struct{
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Error string `json:"error"`
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}{
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Error: string(e),
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}, "", " ")
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}
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func checkForAuthHeader(header http.Header) (string, bool) {
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auths, ok := header["Authorization"]
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if ok == false {
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return "", false
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}
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for _, auth := range(auths) {
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parts := strings.SplitN(auth, " ", 2)
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if len(parts) != 2 {
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continue
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}
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if parts[0] == "TM" {
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return parts[1], true
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}
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}
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return "", false
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}
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// Context passed to each resolve execution
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type ResolveContext struct {
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// ID generated for the context so the gql extension can route data to it
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ID uuid.UUID
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// Channel for the gql extension to route data to this context
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Chan chan *ReadResultSignal
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// Graph Context this resolver is running under
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Context *Context
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// GQL Extension context this resolver is running under
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GQLContext *GQLExtContext
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// Pointer to the node that's currently processing this request
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Server *Node
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// The state data for the node processing this request
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Ext *GQLExt
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// ID of the user that made this request
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// TODO: figure out auth
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User NodeID
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}
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const GQL_RESOLVER_CHAN_SIZE = 10
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func NewResolveContext(ctx *Context, server *Node, gql_ext *GQLExt, r *http.Request) (*ResolveContext, error) {
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username, _, ok := r.BasicAuth()
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if ok == false {
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return nil, fmt.Errorf("GQL_REQUEST_ERR: no auth header included in request header")
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}
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auth_id, err := ParseID(username)
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if err != nil {
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return nil, fmt.Errorf("GQL_REQUEST_ERR: failed to parse ID from auth username: %s", username)
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}
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return &ResolveContext{
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Ext: gql_ext,
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ID: uuid.New(),
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Chan: make(chan *ReadResultSignal, GQL_RESOLVER_CHAN_SIZE),
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Context: ctx,
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GQLContext: ctx.Extensions[Hash(GQLExtType)].Data.(*GQLExtContext),
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Server: server,
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User: auth_id,
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}, nil
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}
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func GQLHandler(ctx *Context, server *Node, gql_ext *GQLExt) func(http.ResponseWriter, *http.Request) {
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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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resolve_context, err := NewResolveContext(ctx, server, gql_ext, r)
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if err != nil {
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ctx.Log.Logf("gql", "GQL_AUTH_ERR: %s", err)
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json.NewEncoder(w).Encode(GQLUnauthorized(fmt.Sprintf("%s", err)))
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return
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}
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req_ctx := context.Background()
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req_ctx = context.WithValue(req_ctx, "resolve", resolve_context)
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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", "GQL_READ_ERR: %s", err)
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json.NewEncoder(w).Encode(fmt.Sprintf("%e", err))
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return
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}
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query := GQLPayload{}
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json.Unmarshal(str, &query)
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gql_context := ctx.Extensions[Hash(GQLExtType)].Data.(*GQLExtContext)
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params := graphql.Params{
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Schema: gql_context.Schema,
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Context: req_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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gql_ext.resolver_chans_lock.Lock()
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gql_ext.resolver_chans[resolve_context.ID] = resolve_context.Chan
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gql_ext.resolver_chans_lock.Unlock()
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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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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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func GQLWSHandler(ctx * Context, server *Node, gql_ext *GQLExt) func(http.ResponseWriter, *http.Request) {
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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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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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resolve_context, err := NewResolveContext(ctx, server, gql_ext, r)
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if err != nil {
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ctx.Log.Logf("gql", "GQL_AUTH_ERR: %s", err)
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return
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}
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req_ctx := context.Background()
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req_ctx = context.WithValue(req_ctx, "resolve", resolve_context)
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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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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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},
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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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gql_context := ctx.Extensions[Hash(GQLExtType)].Data.(*GQLExtContext)
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params := graphql.Params{
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Schema: gql_context.Schema,
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Context: req_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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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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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: GQLPayload{
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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 {
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ctx.Log.Logf("gqlws", "ERROR: %+v", err)
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continue
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}
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}
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}(res_chan)
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} else {
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}
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}
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return
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} else {
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panic("Failed to upgrade websocket")
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}
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}
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}
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type Interface struct {
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Interface *graphql.Interface
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Default *graphql.Object
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List *graphql.List
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Extensions []ExtType
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}
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type Type struct {
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Type *graphql.Object
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List *graphql.List
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}
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type Field struct {
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Ext ExtType
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Name string
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Field *graphql.Field
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}
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// GQL Specific Context information
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type GQLExtContext struct {
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// Generated GQL schema
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Schema graphql.Schema
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// Custom graphql types, mapped to NodeTypes
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NodeTypes map[NodeType]*graphql.Object
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Interfaces map[string]*Interface
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Fields map[string]Field
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// Schema parameters
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Types []graphql.Type
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Query *graphql.Object
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Mutation *graphql.Object
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Subscription *graphql.Object
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}
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func (ctx *GQLExtContext) GetACLFields(obj_name string, names []string) (map[ExtType][]string, error) {
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ext_fields := map[ExtType][]string{}
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for _, name := range(names) {
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switch name {
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case "ID":
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case "TypeHash":
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default:
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field, exists := ctx.Fields[name]
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if exists == false {
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return nil, fmt.Errorf("%s is not a know field in GQLContext, cannot resolve", name)
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}
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ext, exists := ext_fields[field.Ext]
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if exists == false {
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ext = []string{}
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}
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ext = append(ext, field.Name)
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ext_fields[field.Ext] = ext
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}
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}
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return ext_fields, nil
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}
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func BuildSchema(ctx *GQLExtContext) (graphql.Schema, error) {
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schemaConfig := graphql.SchemaConfig{
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Types: ctx.Types,
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Query: ctx.Query,
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Mutation: ctx.Mutation,
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Subscription: ctx.Subscription,
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}
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return graphql.NewSchema(schemaConfig)
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}
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func RegisterField[T any](ctx *GQLExtContext, gql_type graphql.Type, gql_name string, ext_type ExtType, acl_name string, resolve_fn func(T)(interface{}, error)) error {
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if ctx == nil {
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return fmt.Errorf("ctx is nil")
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}
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if resolve_fn == nil {
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return fmt.Errorf("resolve_fn cannot be nil")
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}
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_, exists := ctx.Fields[gql_name]
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if exists == true {
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return fmt.Errorf("%s is already a field in the context, cannot add again", gql_name)
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|
}
|
|
|
|
ctx.Fields[gql_name] = Field{ext_type, acl_name, &graphql.Field{
|
|
Type: gql_type,
|
|
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
|
|
return ResolveNodeResult(p, func(result NodeResult) (interface{}, error) {
|
|
ext, exists := result.Result.Extensions[ext_type]
|
|
if exists == false {
|
|
return nil, fmt.Errorf("%s is not in the extensions of the result", ext_type)
|
|
}
|
|
|
|
val_if, exists := ext[acl_name]
|
|
if exists == false {
|
|
return nil, fmt.Errorf("%s is not in the fields of %s in the result", acl_name, ext_type)
|
|
}
|
|
|
|
var zero T
|
|
val, ok := val_if.(T)
|
|
if ok == false {
|
|
return nil, fmt.Errorf("%s.%s is not %s", ext_type, acl_name, reflect.TypeOf(zero))
|
|
}
|
|
|
|
return resolve_fn(val)
|
|
})
|
|
},
|
|
}}
|
|
return nil
|
|
}
|
|
|
|
func GQLInterfaces(ctx *GQLExtContext, interface_names []string) ([]*graphql.Interface, error) {
|
|
ret := make([]*graphql.Interface, len(interface_names))
|
|
for i, in := range(interface_names) {
|
|
ctx_interface, exists := ctx.Interfaces[in]
|
|
if exists == false {
|
|
return nil, fmt.Errorf("%s is not in GQLExtContext.Interfaces", in)
|
|
}
|
|
ret[i] = ctx_interface.Interface
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func GQLFields(ctx *GQLExtContext, field_names []string) (graphql.Fields, []ExtType, error) {
|
|
fields := graphql.Fields{
|
|
"ID": &graphql.Field{
|
|
Type: graphql.String,
|
|
Resolve: ResolveNodeID,
|
|
},
|
|
"TypeHash": &graphql.Field{
|
|
Type: graphql.String,
|
|
Resolve: ResolveNodeTypeHash,
|
|
},
|
|
}
|
|
|
|
exts := map[ExtType]ExtType{}
|
|
ext_list := []ExtType{}
|
|
for _, name := range(field_names) {
|
|
field, exists := ctx.Fields[name]
|
|
if exists == false {
|
|
return nil, nil, fmt.Errorf("%s is not in GQLExtContext.Fields", name)
|
|
}
|
|
fields[name] = field.Field
|
|
_, exists = exts[field.Ext]
|
|
if exists == false {
|
|
ext_list = append(ext_list, field.Ext)
|
|
exts[field.Ext] = field.Ext
|
|
}
|
|
}
|
|
|
|
return fields, ext_list, nil
|
|
}
|
|
|
|
type NodeResult struct {
|
|
ID NodeID
|
|
Result *ReadResultSignal
|
|
}
|
|
|
|
type ListField struct {
|
|
ACLName string
|
|
Extension ExtType
|
|
ResolveFn func(interface{}) ([]NodeID, error)
|
|
}
|
|
|
|
type SelfField struct {
|
|
ACLName string
|
|
Extension ExtType
|
|
ResolveFn func(interface{}) (NodeID, error)
|
|
}
|
|
|
|
func (ctx *GQLExtContext) RegisterInterface(name string, default_name string, interfaces []string, fields []string, self_fields map[string]SelfField, list_fields map[string]ListField) error {
|
|
if interfaces == nil {
|
|
return fmt.Errorf("interfaces is nil")
|
|
}
|
|
|
|
if fields == nil {
|
|
return fmt.Errorf("fields is nil")
|
|
}
|
|
|
|
_, exists := ctx.Interfaces[name]
|
|
if exists == true {
|
|
return fmt.Errorf("%s is already an interface in ctx", name)
|
|
}
|
|
|
|
node_interfaces, err := GQLInterfaces(ctx, interfaces)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
node_fields, node_exts, err := GQLFields(ctx, fields)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ctx_interface := Interface{}
|
|
|
|
ctx_interface.Interface = graphql.NewInterface(graphql.InterfaceConfig{
|
|
Name: name,
|
|
ResolveType: NodeInterfaceResolveType(node_exts, &ctx_interface.Default),
|
|
Fields: node_fields,
|
|
})
|
|
ctx_interface.List = graphql.NewList(ctx_interface.Interface)
|
|
|
|
//TODO finish self_fields and do list_fields
|
|
for field_name, self_field := range(self_fields) {
|
|
err := RegisterField(ctx, ctx_interface.Interface, field_name, self_field.Extension, self_field.ACLName, func(id_str string) (interface{}, error) {
|
|
return nil, nil
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
ctx_interface.Default = graphql.NewObject(graphql.ObjectConfig{
|
|
Name: default_name,
|
|
Interfaces: append(node_interfaces, ctx_interface.Interface),
|
|
IsTypeOf: NodeInterfaceDefaultIsType(node_exts),
|
|
Fields: node_fields,
|
|
})
|
|
|
|
ctx.Interfaces[name] = &ctx_interface
|
|
ctx.Types = append(ctx.Types, ctx_interface.Default)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (ctx *GQLExtContext) RegisterNodeType(node_type NodeType, name string, interface_names []string, field_names []string) error {
|
|
if field_names == nil {
|
|
return fmt.Errorf("fields is nil")
|
|
}
|
|
|
|
_, exists := ctx.NodeTypes[node_type]
|
|
if exists == true {
|
|
return fmt.Errorf("%s already in GQLExtContext.NodeTypes", node_type)
|
|
}
|
|
|
|
node_interfaces, err := GQLInterfaces(ctx, interface_names)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
gql_fields, _, err := GQLFields(ctx, field_names)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
gql_type := graphql.NewObject(graphql.ObjectConfig{
|
|
Name: name,
|
|
Interfaces: node_interfaces,
|
|
IsTypeOf: func(p graphql.IsTypeOfParams) bool {
|
|
node, ok := p.Value.(NodeResult)
|
|
if ok == false {
|
|
return false
|
|
}
|
|
|
|
return node.Result.NodeType == node_type
|
|
},
|
|
Fields: gql_fields,
|
|
})
|
|
|
|
ctx.NodeTypes[node_type] = gql_type
|
|
ctx.Types = append(ctx.Types, gql_type)
|
|
|
|
return nil
|
|
}
|
|
|
|
func NewGQLExtContext() *GQLExtContext {
|
|
query := graphql.NewObject(graphql.ObjectConfig{
|
|
Name: "Query",
|
|
Fields: graphql.Fields{},
|
|
})
|
|
|
|
context := GQLExtContext{
|
|
Schema: graphql.Schema{},
|
|
Types: []graphql.Type{},
|
|
Query: query,
|
|
Mutation: nil,
|
|
Subscription: nil,
|
|
NodeTypes: map[NodeType]*graphql.Object{},
|
|
Interfaces: map[string]*Interface{},
|
|
Fields: map[string]Field{},
|
|
}
|
|
|
|
var err error
|
|
err = context.RegisterInterface("Node", "DefaultNode", []string{}, []string{}, map[string]SelfField{}, map[string]ListField{})
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
context.Query.AddFieldConfig("Node", &graphql.Field{
|
|
Type: context.Interfaces["Node"].Interface,
|
|
Args: graphql.FieldConfigArgument{
|
|
"id": &graphql.ArgumentConfig{
|
|
Type: graphql.String,
|
|
},
|
|
},
|
|
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
|
|
ctx, err := PrepResolve(p)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
id_str, err := ExtractParam[string](p, "id")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return ResolveNode(ctx, p, id_str)
|
|
},
|
|
})
|
|
|
|
schema, err := BuildSchema(&context)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
context.Schema = schema
|
|
|
|
return &context
|
|
}
|
|
|
|
type GQLExt struct {
|
|
tcp_listener net.Listener
|
|
http_server *http.Server
|
|
http_done sync.WaitGroup
|
|
|
|
// map of read request IDs to gql request ID
|
|
resolver_reads map[uuid.UUID]uuid.UUID
|
|
resolver_reads_lock sync.RWMutex
|
|
// map of gql request ID to active channel
|
|
resolver_chans map[uuid.UUID]chan *ReadResultSignal
|
|
resolver_chans_lock sync.RWMutex
|
|
|
|
tls_key []byte
|
|
tls_cert []byte
|
|
Listen string
|
|
}
|
|
|
|
func (ext *GQLExt) Field(name string) interface{} {
|
|
return ResolveFields(ext, name, map[string]func(*GQLExt)interface{}{
|
|
"listen": func(ext *GQLExt) interface{} {
|
|
return ext.Listen
|
|
},
|
|
})
|
|
}
|
|
|
|
func (ext *GQLExt) Process(ctx *Context, source NodeID, node *Node, signal Signal) {
|
|
// Process ReadResultSignalType by forwarding it to the waiting resolver
|
|
if signal.Type() == ReadResultSignalType {
|
|
sig := signal.(ReadResultSignal)
|
|
ext.resolver_reads_lock.RLock()
|
|
resolver_id, exists := ext.resolver_reads[sig.UUID]
|
|
ext.resolver_reads_lock.RUnlock()
|
|
|
|
if exists == true {
|
|
ext.resolver_reads_lock.Lock()
|
|
delete(ext.resolver_reads, sig.UUID)
|
|
ext.resolver_reads_lock.Unlock()
|
|
|
|
ext.resolver_chans_lock.RLock()
|
|
resolver_chan, exists := ext.resolver_chans[resolver_id]
|
|
ext.resolver_chans_lock.RUnlock()
|
|
|
|
if exists == true {
|
|
select {
|
|
case resolver_chan <- &sig:
|
|
ctx.Log.Logf("gql", "Forwarded to resolver %s, %+v", resolver_id, sig)
|
|
default:
|
|
ctx.Log.Logf("gql", "Resolver %s channel overflow %+v", resolver_id, sig)
|
|
ext.resolver_chans_lock.Lock()
|
|
delete(ext.resolver_chans, resolver_id)
|
|
ext.resolver_chans_lock.Unlock()
|
|
}
|
|
} else {
|
|
ctx.Log.Logf("gql", "Received message for waiting resolver %s which doesn't exist - %+v", resolver_id, sig)
|
|
}
|
|
} else {
|
|
ctx.Log.Logf("gql", "Received read result that wasn't expected - %+v", sig)
|
|
}
|
|
} else if signal.Type() == GQLStateSignalType {
|
|
sig := signal.(StateSignal)
|
|
switch sig.State {
|
|
case "start_server":
|
|
err := ext.StartGQLServer(ctx, node)
|
|
if err == nil {
|
|
ctx.Send(node.ID, source, StateSignal{NewDirectSignal(GQLStateSignalType), "server_started"})
|
|
}
|
|
case "stop_server":
|
|
err := ext.StopGQLServer()
|
|
if err == nil {
|
|
ctx.Send(node.ID, source, StateSignal{NewDirectSignal(GQLStateSignalType), "server_stopped"})
|
|
}
|
|
default:
|
|
ctx.Log.Logf("gql", "unknown gql state %s", sig.State)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ext *GQLExt) Type() ExtType {
|
|
return GQLExtType
|
|
}
|
|
|
|
type GQLExtJSON struct {
|
|
Listen string `json:"listen"`
|
|
TLSKey []byte `json:"ssl_key"`
|
|
TLSCert []byte `json:"ssl_cert"`
|
|
}
|
|
|
|
func (ext *GQLExt) Serialize() ([]byte, error) {
|
|
return json.MarshalIndent(&GQLExtJSON{
|
|
Listen: ext.Listen,
|
|
TLSKey: ext.tls_key,
|
|
TLSCert: ext.tls_cert,
|
|
}, "", " ")
|
|
}
|
|
|
|
var ecdsa_curves = map[uint8]elliptic.Curve{
|
|
0: elliptic.P256(),
|
|
}
|
|
|
|
var ecdsa_curve_ids = map[elliptic.Curve]uint8{
|
|
elliptic.P256(): 0,
|
|
}
|
|
|
|
var ecdh_curves = map[uint8]ecdh.Curve{
|
|
0: ecdh.P256(),
|
|
}
|
|
|
|
var ecdh_curve_ids = map[ecdh.Curve]uint8{
|
|
ecdh.P256(): 0,
|
|
}
|
|
|
|
func LoadGQLExt(ctx *Context, data []byte) (Extension, error) {
|
|
var j GQLExtJSON
|
|
err := json.Unmarshal(data, &j)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return NewGQLExt(ctx, j.Listen, j.TLSCert, j.TLSKey)
|
|
}
|
|
|
|
func NewGQLExt(ctx *Context, listen string, tls_cert []byte, tls_key []byte) (*GQLExt, error) {
|
|
if tls_cert == nil || tls_key == nil {
|
|
ssl_key, err := ecdsa.GenerateKey(ctx.ECDSA, rand.Reader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ssl_key_bytes, err := x509.MarshalECPrivateKey(ssl_key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ssl_key_pem := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: ssl_key_bytes})
|
|
|
|
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
|
serialNumber, _ := rand.Int(rand.Reader, serialNumberLimit)
|
|
notBefore := time.Now()
|
|
notAfter := notBefore.Add(365*24*time.Hour)
|
|
template := x509.Certificate{
|
|
SerialNumber: serialNumber,
|
|
Subject: pkix.Name{
|
|
Organization: []string{"mekkanized"},
|
|
},
|
|
NotBefore: notBefore,
|
|
NotAfter: notAfter,
|
|
KeyUsage: x509.KeyUsageDigitalSignature,
|
|
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
|
|
BasicConstraintsValid: true,
|
|
}
|
|
|
|
ssl_cert, err := x509.CreateCertificate(rand.Reader, &template, &template, &ssl_key.PublicKey, ssl_key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ssl_cert_pem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: ssl_cert})
|
|
|
|
tls_cert = ssl_cert_pem
|
|
tls_key = ssl_key_pem
|
|
}
|
|
return &GQLExt{
|
|
Listen: listen,
|
|
resolver_reads: map[uuid.UUID]uuid.UUID{},
|
|
resolver_chans: map[uuid.UUID]chan *ReadResultSignal{},
|
|
tls_cert: tls_cert,
|
|
tls_key: tls_key,
|
|
}, nil
|
|
}
|
|
|
|
func (ext *GQLExt) StartGQLServer(ctx *Context, node *Node) error {
|
|
if ext.tcp_listener != nil || ext.http_server != nil {
|
|
return fmt.Errorf("listener or server is still running, stop them first")
|
|
}
|
|
mux := http.NewServeMux()
|
|
mux.HandleFunc("/gql", GQLHandler(ctx, node, ext))
|
|
mux.HandleFunc("/gqlws", GQLWSHandler(ctx, node, ext))
|
|
|
|
// Server a graphiql interface(TODO make configurable whether to start this)
|
|
mux.HandleFunc("/graphiql", GraphiQLHandler())
|
|
|
|
// Server the ./site directory to /site (TODO make configurable with better defaults)
|
|
fs := http.FileServer(http.Dir("./site"))
|
|
mux.Handle("/site/", http.StripPrefix("/site", fs))
|
|
|
|
http_server := &http.Server{
|
|
Addr: ext.Listen,
|
|
Handler: mux,
|
|
}
|
|
|
|
l, err := net.Listen("tcp", http_server.Addr)
|
|
if err != nil {
|
|
return fmt.Errorf("Failed to start listener for server on %s", http_server.Addr)
|
|
}
|
|
|
|
cert, err := tls.X509KeyPair(ext.tls_cert, ext.tls_key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
config := tls.Config{
|
|
Certificates: []tls.Certificate{cert},
|
|
NextProtos: []string{"http/1.1"},
|
|
}
|
|
|
|
listener := tls.NewListener(l, &config)
|
|
|
|
ext.http_done.Add(1)
|
|
go func(qql_ext *GQLExt) {
|
|
defer ext.http_done.Done()
|
|
|
|
err := http_server.Serve(listener)
|
|
if err != http.ErrServerClosed {
|
|
panic(fmt.Sprintf("Failed to start gql server: %s", err))
|
|
}
|
|
}(ext)
|
|
|
|
|
|
ext.tcp_listener = listener
|
|
ext.http_server = http_server
|
|
return nil
|
|
}
|
|
|
|
func (ext *GQLExt) StopGQLServer() error {
|
|
if ext.tcp_listener == nil || ext.http_server == nil {
|
|
return fmt.Errorf("already shutdown, cannot shut down again" )
|
|
}
|
|
ext.http_server.Shutdown(context.TODO())
|
|
ext.http_done.Wait()
|
|
ext.tcp_listener = nil
|
|
ext.http_server = nil
|
|
return nil
|
|
}
|