super-graph/serv/http.go

108 lines
2.2 KiB
Go

package serv
import (
"encoding/json"
"errors"
"io"
"io/ioutil"
"net/http"
"strings"
"time"
"github.com/gorilla/websocket"
)
const (
maxReadBytes = 100000 // 100Kb
introspectionQuery = "IntrospectionQuery"
openVar = "{{"
closeVar = "}}"
)
var (
upgrader = websocket.Upgrader{}
errNoUserID = errors.New("no user_id available")
errUnauthorized = errors.New("not authorized")
)
type gqlReq struct {
OpName string `json:"operationName"`
Query string `json:"query"`
Vars variables `json:"variables"`
}
type variables map[string]interface{}
type gqlResp struct {
Error string `json:"error,omitempty"`
Data json.RawMessage `json:"data"`
Extensions *extensions `json:"extensions,omitempty"`
}
type extensions struct {
Tracing *trace `json:"tracing,omitempty"`
}
type trace struct {
Version int `json:"version"`
StartTime time.Time `json:"startTime"`
EndTime time.Time `json:"endTime"`
Duration time.Duration `json:"duration"`
Execution execution `json:"execution"`
}
type execution struct {
Resolvers []resolver `json:"resolvers"`
}
type resolver struct {
Path []string `json:"path"`
ParentType string `json:"parentType"`
FieldName string `json:"fieldName"`
ReturnType string `json:"returnType"`
StartOffset int `json:"startOffset"`
Duration time.Duration `json:"duration"`
}
func apiv1Http(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
if authFailBlock == authFailBlockAlways && authCheck(ctx) == false {
http.Error(w, "Not authorized", 401)
return
}
b, err := ioutil.ReadAll(io.LimitReader(r.Body, maxReadBytes))
defer r.Body.Close()
if err != nil {
errorResp(w, err)
return
}
req := &gqlReq{}
if err := json.Unmarshal(b, req); err != nil {
errorResp(w, err)
return
}
if strings.EqualFold(req.OpName, introspectionQuery) {
dat, err := ioutil.ReadFile("test.schema")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Write(dat)
return
}
err = handleReq(ctx, w, req)
if err == errUnauthorized {
http.Error(w, "Not authorized", 401)
}
if err != nil {
errorResp(w, err)
}
}