diff --git a/examples/call-graphql.go b/examples/call-graphql.go new file mode 100644 index 000000000..ab72c1419 --- /dev/null +++ b/examples/call-graphql.go @@ -0,0 +1,93 @@ +package main + +import ( + "bytes" + "encoding/json" + "errors" + "fmt" + "io/ioutil" + "net/http" + "os" +) + +func jsonPrettyPrint(in []byte) string { + var out bytes.Buffer + err := json.Indent(&out, in, "", " ") + if err != nil { + return string(in) + } + return out.String() +} + +var HASURA_GRAPHQL_ADDRESS = os.Getenv("HASURA_GRAPHQL_ADDRESS") +var HASURA_GRAPHQL_ADMIN_SECRET = os.Getenv("HASURA_GRAPHQL_ADMIN_SECRET") + +type GraphqlQuery struct { + Data interface{} +} + +var client = &http.Client{Transport: http.DefaultTransport} + +func hasura(query string, variables interface{}, data interface{}) (err error) { + variablesBytes, err := json.Marshal(variables) + if err != nil { + return + } + + v := string(variablesBytes) + requestBody := []byte(`{"query":"` + query + `","variables":` + v + `}`) + requestBytes := bytes.NewBuffer(requestBody) + req, err := http.NewRequest("POST", HASURA_GRAPHQL_ADDRESS, requestBytes) + if err != nil { + return + } + + req.Header.Add("X-Hasura-Admin-Secret", HASURA_GRAPHQL_ADMIN_SECRET) + + resp, err := client.Do(req) + if err != nil { + return + } + + b, err := ioutil.ReadAll(resp.Body) + if err != nil { + return + } + + // loggin the answer for debugging purposes + fmt.Println(jsonPrettyPrint(b)) + + if resp.StatusCode < 200 || resp.StatusCode > 299 { + return errors.New(http.StatusText(resp.StatusCode)) + } + + gqlQuery := GraphqlQuery{Data: data} + err = json.Unmarshal(b, &gqlQuery) + if err != nil { + return + } + return +} + +type User struct { + GithubLogin string +} + +const userQuery = ` +query { + user { + githubLogin + } +}` + +func getUsers() (users []User, err error) { + var data map[string][]User + err = hasura(userQuery, nil, &data) + return data["user"], err +} + +func main() { + fmt.Println(getUsers()) +} + +// HASURA_GRAPHQL_ADMIN_SECRET=VERYVERYSECRET HASURA_GRAPHQL_ADDRESS=http://localhost/graphql-engine/v1alpha1/graphql go run call-graphql.go