mirror of https://github.com/status-im/op-geth.git
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package relay
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import (
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strings"
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graphql "github.com/graph-gophers/graphql-go"
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)
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func MarshalID(kind string, spec interface{}) graphql.ID {
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d, err := json.Marshal(spec)
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if err != nil {
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panic(fmt.Errorf("relay.MarshalID: %s", err))
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}
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return graphql.ID(base64.URLEncoding.EncodeToString(append([]byte(kind+":"), d...)))
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}
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func UnmarshalKind(id graphql.ID) string {
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s, err := base64.URLEncoding.DecodeString(string(id))
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if err != nil {
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return ""
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}
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i := strings.IndexByte(string(s), ':')
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if i == -1 {
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return ""
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}
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return string(s[:i])
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}
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func UnmarshalSpec(id graphql.ID, v interface{}) error {
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s, err := base64.URLEncoding.DecodeString(string(id))
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if err != nil {
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return err
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}
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i := strings.IndexByte(string(s), ':')
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if i == -1 {
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return errors.New("invalid graphql.ID")
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}
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return json.Unmarshal([]byte(s[i+1:]), v)
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}
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type Handler struct {
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Schema *graphql.Schema
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}
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func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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var params struct {
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Query string `json:"query"`
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OperationName string `json:"operationName"`
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Variables map[string]interface{} `json:"variables"`
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}
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if err := json.NewDecoder(r.Body).Decode(¶ms); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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response := h.Schema.Exec(r.Context(), params.Query, params.OperationName, params.Variables)
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responseJSON, err := json.Marshal(response)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(responseJSON)
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}
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