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handler.go
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/*
* MIT License
* Copyright (c) 2016 Samsara Networks Inc.
* Modifications copyright 2020 The ChubaoFS Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*/
package cutil
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"sync"
"github.com/chubaofs/chubaofs/proto"
client2 "github.com/chubaofs/chubaofs/sdk/graphql/client"
"github.com/chubaofs/chubaofs/util/log"
"github.com/samsarahq/thunder/batch"
"github.com/samsarahq/thunder/graphql"
"github.com/samsarahq/thunder/reactive"
)
type graphqlProxyHandler struct {
client *client2.MasterGClient
}
func NewProxyHandler(client *client2.MasterGClient) *graphqlProxyHandler {
return &graphqlProxyHandler{client: client}
}
func Token(r *http.Request) (string, error) {
if token := r.Header.Get(proto.HeadAuthorized); token != "" {
return token, nil
}
if err := r.ParseForm(); err != nil {
return "", err
}
return r.Form.Get(proto.ParamAuthorized), nil
}
type httpResponse struct {
Data interface{} `json:"data,omitempty"`
Errors []string `json:"errors,omitempty"`
}
type httpPostBody struct {
Query string `json:"query"`
Variables map[string]interface{} `json:"variables"`
}
func writeResponse(w http.ResponseWriter, code int, value interface{}, err error) {
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, PATCH")
w.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Accept, X-Requested-With")
w.Header().Set("Access-Control-Allow-Credentials", "true")
response := httpResponse{}
if err != nil {
msg := struct {
Messge string `json:"message"`
Code int `json:"code"`
}{
Messge: err.Error(),
Code: code,
}
v, e := json.Marshal(msg)
if e != nil {
v = []byte(fmt.Sprintf("marshal has err , real err is:[%s]", err.Error()))
}
response.Errors = []string{string(v)}
} else {
response.Data = value
}
responseJSON, err := json.Marshal(response)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if w.Header().Get("Content-Type") == "" {
w.Header().Set("Content-Type", "application/json")
}
if _, err := w.Write(responseJSON); err != nil {
log.LogWarnf("write reponse has err:[%s]", err.Error())
}
}
//This code is borrowed https://github.com/samsarahq/thunder
func (h *graphqlProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
writeResponse(w, http.StatusMethodNotAllowed, nil, errors.New("request must be a POST"))
return
}
if r.Body == nil {
writeResponse(w, http.StatusBadRequest, nil, errors.New("request must include a query"))
return
}
header := r.Header
token, err := Token(r)
if err != nil {
writeResponse(w, http.StatusUnauthorized, nil, err)
return
}
ui, err := TokenValidate(token)
if err != nil {
writeResponse(w, http.StatusProxyAuthRequired, nil, err)
return
}
UserID := ui.User_id
header.Set(proto.UserKey, UserID)
rep, err := h.client.Proxy(r.Context(), r, header)
if err != nil {
if rep != nil {
writeResponse(w, rep.Code, nil, err)
} else {
writeResponse(w, http.StatusInternalServerError, nil, err)
}
return
}
responseJSON, err := json.Marshal(rep)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if w.Header().Get("Content-Type") == "" {
w.Header().Set("Content-Type", "application/json")
}
if _, err := w.Write(responseJSON); err != nil {
log.LogWarnf("write reponse has err:[%s]", err.Error())
}
}
type httpHandler struct {
schema *graphql.Schema
middlewares []graphql.MiddlewareFunc
executor graphql.ExecutorRunner
}
func HTTPHandler(schema *graphql.Schema, middlewares ...graphql.MiddlewareFunc) http.Handler {
return HTTPHandlerWithExecutor(schema, (graphql.NewExecutor(graphql.NewImmediateGoroutineScheduler())), middlewares...)
}
func HTTPHandlerWithExecutor(schema *graphql.Schema, executor graphql.ExecutorRunner, middlewares ...graphql.MiddlewareFunc) http.Handler {
return &httpHandler{
schema: schema,
middlewares: middlewares,
executor: executor,
}
}
func (h *httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
writeResponse(w, http.StatusMethodNotAllowed, nil, errors.New("request must be a POST"))
return
}
if r.Body == nil {
writeResponse(w, http.StatusBadRequest, nil, errors.New("request must include a query"))
return
}
ctx := r.Context()
if r.RequestURI != "/login" {
token, err := Token(r)
if err != nil {
writeResponse(w, http.StatusUnauthorized, nil, err)
return
}
ui, err := TokenValidate(token)
if err != nil {
writeResponse(w, http.StatusProxyAuthRequired, nil, err)
return
}
ctx = context.WithValue(ctx, proto.UserKey, ui.User_id)
ctx = context.WithValue(ctx, proto.UserInfoKey, ui)
}
if r.RequestURI == "/monitor" {
value := ctx.Value(proto.UserInfoKey)
if value == nil {
writeResponse(w, http.StatusProxyAuthRequired, nil, fmt.Errorf("user not found"))
}
ui := value.(*proto.UserInfo)
if ui.UserType != proto.UserTypeRoot && ui.UserType != proto.UserTypeAdmin {
writeResponse(w, http.StatusProxyAuthRequired, nil, fmt.Errorf("no access visit monitor"))
}
}
var params httpPostBody
if err := json.NewDecoder(r.Body).Decode(¶ms); err != nil {
writeResponse(w, http.StatusInternalServerError, nil, err)
return
}
query, err := graphql.Parse(params.Query, params.Variables)
if err != nil {
writeResponse(w, http.StatusInternalServerError, nil, err)
return
}
schema := h.schema.Query
if query.Kind == "mutation" {
schema = h.schema.Mutation
}
if err := graphql.PrepareQuery(ctx, schema, query.SelectionSet); err != nil {
writeResponse(w, http.StatusInternalServerError, nil, err)
return
}
var wg sync.WaitGroup
e := h.executor
wg.Add(1)
runner := reactive.NewRerunner(ctx, func(ctx context.Context) (interface{}, error) {
defer wg.Done()
ctx = batch.WithBatching(ctx)
var middlewares []graphql.MiddlewareFunc
middlewares = append(middlewares, h.middlewares...)
middlewares = append(middlewares, func(input *graphql.ComputationInput, next graphql.MiddlewareNextFunc) *graphql.ComputationOutput {
output := next(input)
output.Current, output.Error = e.Execute(input.Ctx, schema, nil, input.ParsedQuery)
return output
})
output := graphql.RunMiddlewares(middlewares, &graphql.ComputationInput{
Ctx: ctx,
ParsedQuery: query,
Query: params.Query,
Variables: params.Variables,
})
current, err := output.Current, output.Error
if err != nil {
if graphql.ErrorCause(err) == context.Canceled {
return nil, err
}
writeResponse(w, http.StatusBadRequest, nil, err)
return nil, err
}
writeResponse(w, http.StatusOK, current, nil)
return nil, nil
}, graphql.DefaultMinRerunInterval, false)
wg.Wait()
runner.Stop()
}
func parseResponseNames(r *http.Request) ([]string, error) {
var params httpPostBody
if err := json.NewDecoder(r.Body).Decode(¶ms); err != nil {
return nil, err
}
query, err := graphql.Parse(params.Query, params.Variables)
if err != nil {
return nil, err
}
list := make([]string, 0)
for _, s := range query.Selections {
list = append(list, s.Name)
}
return list, nil
}
func IQLFun(writer http.ResponseWriter, request *http.Request) {
writer.Write([]byte(`<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
<title>GraphQL Playground</title>
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/graphql-playground-react/build/static/css/index.css" />
<link rel="shortcut icon" href="//cdn.jsdelivr.net/npm/graphql-playground-react/build/favicon.png" />
<script src="//cdn.jsdelivr.net/npm/graphql-playground-react/build/static/js/middleware.js"></script>
</head>
<body>
<style type="text/css">
html {
font-family: "Open Sans", sans-serif;
overflow: hidden;
}
body {
margin: 0;
background: #172a3a;
}
.playgroundIn {
-webkit-animation: playgroundIn 0.5s ease-out forwards;
animation: playgroundIn 0.5s ease-out forwards;
}
@-webkit-keyframes playgroundIn {
from {
opacity: 0;
-webkit-transform: translateY(10px);
-ms-transform: translateY(10px);
transform: translateY(10px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
@keyframes playgroundIn {
from {
opacity: 0;
-webkit-transform: translateY(10px);
-ms-transform: translateY(10px);
transform: translateY(10px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
</style>
<style type="text/css">
.fadeOut {
-webkit-animation: fadeOut 0.5s ease-out forwards;
animation: fadeOut 0.5s ease-out forwards;
}
@-webkit-keyframes fadeIn {
from {
opacity: 0;
-webkit-transform: translateY(-10px);
-ms-transform: translateY(-10px);
transform: translateY(-10px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
@keyframes fadeIn {
from {
opacity: 0;
-webkit-transform: translateY(-10px);
-ms-transform: translateY(-10px);
transform: translateY(-10px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
@-webkit-keyframes fadeOut {
from {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
to {
opacity: 0;
-webkit-transform: translateY(-10px);
-ms-transform: translateY(-10px);
transform: translateY(-10px);
}
}
@keyframes fadeOut {
from {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
to {
opacity: 0;
-webkit-transform: translateY(-10px);
-ms-transform: translateY(-10px);
transform: translateY(-10px);
}
}
@-webkit-keyframes appearIn {
from {
opacity: 0;
-webkit-transform: translateY(0px);
-ms-transform: translateY(0px);
transform: translateY(0px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
@keyframes appearIn {
from {
opacity: 0;
-webkit-transform: translateY(0px);
-ms-transform: translateY(0px);
transform: translateY(0px);
}
to {
opacity: 1;
-webkit-transform: translateY(0);
-ms-transform: translateY(0);
transform: translateY(0);
}
}
@-webkit-keyframes scaleIn {
from {
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
}
to {
-webkit-transform: scale(1);
-ms-transform: scale(1);
transform: scale(1);
}
}
@keyframes scaleIn {
from {
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
}
to {
-webkit-transform: scale(1);
-ms-transform: scale(1);
transform: scale(1);
}
}
@-webkit-keyframes innerDrawIn {
0% {
stroke-dashoffset: 70;
}
50% {
stroke-dashoffset: 140;
}
100% {
stroke-dashoffset: 210;
}
}
@keyframes innerDrawIn {
0% {
stroke-dashoffset: 70;
}
50% {
stroke-dashoffset: 140;
}
100% {
stroke-dashoffset: 210;
}
}
@-webkit-keyframes outerDrawIn {
0% {
stroke-dashoffset: 76;
}
100% {
stroke-dashoffset: 152;
}
}
@keyframes outerDrawIn {
0% {
stroke-dashoffset: 76;
}
100% {
stroke-dashoffset: 152;
}
}
.hHWjkv {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
}
.gCDOzd {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
}
.hmCcxi {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
}
.eHamQi {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
animation: scaleIn 0.25s linear forwards 0.8222222222222223s;
}
.byhgGu {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
animation: scaleIn 0.25s linear forwards 1.0222222222222221s;
}
.llAKP {
-webkit-transform-origin: 0px 0px;
-ms-transform-origin: 0px 0px;
transform-origin: 0px 0px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
animation: scaleIn 0.25s linear forwards 1.2222222222222223s;
}
.bglIGM {
-webkit-transform-origin: 64px 28px;
-ms-transform-origin: 64px 28px;
transform-origin: 64px 28px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
animation: scaleIn 0.25s linear forwards 0.2222222222222222s;
}
.ksxRII {
-webkit-transform-origin: 95.98500061035156px 46.510000228881836px;
-ms-transform-origin: 95.98500061035156px 46.510000228881836px;
transform-origin: 95.98500061035156px 46.510000228881836px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
animation: scaleIn 0.25s linear forwards 0.4222222222222222s;
}
.cWrBmb {
-webkit-transform-origin: 95.97162628173828px 83.4900016784668px;
-ms-transform-origin: 95.97162628173828px 83.4900016784668px;
transform-origin: 95.97162628173828px 83.4900016784668px;
-webkit-transform: scale(0);
-ms-transform: scale(0);
transform: scale(0);
-webkit-animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
animation: scaleIn 0.25s linear forwards 0.6222222222222222s;
}
.Wnusb {
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