| // Copyright 2019 CUE Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package http |
| |
| //go:generate go run gen.go |
| //go:generate gofmt -s -w . |
| |
| import ( |
| "bytes" |
| "io" |
| "io/ioutil" |
| "net/http" |
| |
| "cuelang.org/go/cue" |
| "cuelang.org/go/internal/task" |
| ) |
| |
| func init() { |
| task.Register("tool/http.Do", newHTTPCmd) |
| |
| // For backwards compatibility. |
| task.Register("http", newHTTPCmd) |
| } |
| |
| type httpCmd struct{} |
| |
| func newHTTPCmd(v cue.Value) (task.Runner, error) { |
| return &httpCmd{}, nil |
| } |
| |
| func (c *httpCmd) Run(ctx *task.Context) (res interface{}, err error) { |
| var header, trailer http.Header |
| var ( |
| method = ctx.String("method") |
| u = ctx.String("url") |
| ) |
| var r io.Reader |
| if obj := ctx.Obj.Lookup("request"); obj.Exists() { |
| if v := obj.Lookup("body"); v.Exists() { |
| r, err = v.Reader() |
| if err != nil { |
| return nil, err |
| } |
| } else { |
| r = bytes.NewReader([]byte("")) |
| } |
| if header, err = parseHeaders(obj, "header"); err != nil { |
| return nil, err |
| } |
| if trailer, err = parseHeaders(obj, "trailer"); err != nil { |
| return nil, err |
| } |
| } |
| if ctx.Err != nil { |
| return nil, ctx.Err |
| } |
| |
| req, err := http.NewRequest(method, u, r) |
| if err != nil { |
| return nil, err |
| } |
| req.Header = header |
| req.Trailer = trailer |
| |
| // TODO: |
| // - retry logic |
| // - TLS certs |
| resp, err := http.DefaultClient.Do(req) |
| if err != nil { |
| return nil, err |
| } |
| defer resp.Body.Close() |
| b, err := ioutil.ReadAll(resp.Body) |
| // parse response body and headers |
| return map[string]interface{}{ |
| "response": map[string]interface{}{ |
| "status": resp.Status, |
| "statusCode": resp.StatusCode, |
| "body": string(b), |
| "header": resp.Header, |
| "trailer": resp.Trailer, |
| }, |
| }, err |
| } |
| |
| func parseHeaders(obj cue.Value, label string) (http.Header, error) { |
| m := obj.Lookup(label) |
| if !m.Exists() { |
| return nil, nil |
| } |
| iter, err := m.Fields() |
| if err != nil { |
| return nil, err |
| } |
| h := http.Header{} |
| for iter.Next() { |
| str, err := iter.Value().String() |
| if err != nil { |
| return nil, err |
| } |
| h.Add(iter.Label(), str) |
| } |
| return h, nil |
| } |