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So TodoSchema can be re-use for demo purposes
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@kr15h @chris-ramon @sogko @WindomZ
package main
import (
func init() {
todo1 := schema.Todo{ID: "a", Text: "A todo not to forget", Done: false}
todo2 := schema.Todo{ID: "b", Text: "This is the most important", Done: false}
todo3 := schema.Todo{ID: "c", Text: "Please do this or else", Done: false}
schema.TodoList = append(schema.TodoList, todo1, todo2, todo3)
func executeQuery(query string, schema graphql.Schema) *graphql.Result {
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
if len(result.Errors) > 0 {
fmt.Printf("wrong result, unexpected errors: %v", result.Errors)
return result
func main() {
http.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {
result := executeQuery(r.URL.Query().Get("query"), schema.TodoSchema)
// Serve static files
fs := http.FileServer(http.Dir("static"))
http.Handle("/", fs)
// Display some basic instructions
fmt.Println("Now server is running on port 8080")
fmt.Println("Get single todo: curl -g 'http://localhost:8080/graphql?query={todo(id:\"b\"){id,text,done}}'")
fmt.Println("Create new todo: curl -g 'http://localhost:8080/graphql?query=mutation+_{createTodo(text:\"My+new+todo\"){id,text,done}}'")
fmt.Println("Update todo: curl -g 'http://localhost:8080/graphql?query=mutation+_{updateTodo(id:\"a\",done:true){id,text,done}}'")
fmt.Println("Load todo list: curl -g 'http://localhost:8080/graphql?query={todoList{id,text,done}}'")
fmt.Println("Access the web app via browser at 'http://localhost:8080'")
http.ListenAndServe(":8080", nil)