106 lines
2.3 KiB
Go
106 lines
2.3 KiB
Go
package utils
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import (
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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"strings"
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"time"
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"github.com/gorilla/schema"
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)
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var (
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DefaultHTTPClient = &http.Client{
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Timeout: time.Duration(30 * time.Second),
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}
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)
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type Decoder interface {
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Decode(dst interface{}, src map[string][]string) error
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}
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type Encoder interface {
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Encode(src interface{}, dst map[string][]string) error
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}
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type FormAuthorization func(url.Values)
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type RequestAuthorization func(*http.Request)
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func AuthorizeBasic(user, password string) RequestAuthorization {
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return func(req *http.Request) {
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req.SetBasicAuth(user, password)
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}
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}
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func FormRequest(endpoint string, request interface{}, authFn interface{}) (*http.Request, error) {
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form := url.Values{}
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encoder := schema.NewEncoder()
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if err := encoder.Encode(request, form); err != nil {
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return nil, err
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}
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if fn, ok := authFn.(FormAuthorization); ok {
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fn(form)
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}
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body := strings.NewReader(form.Encode())
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req, err := http.NewRequest("POST", endpoint, body)
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if err != nil {
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return nil, err
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}
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if fn, ok := authFn.(RequestAuthorization); ok {
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fn(req)
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}
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req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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return req, nil
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}
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func HttpRequest(client *http.Client, req *http.Request, response interface{}) error {
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resp, err := client.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return fmt.Errorf("unable to read response body: %v", err)
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}
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("http status not ok: %s %s", resp.Status, body)
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}
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err = json.Unmarshal(body, response)
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if err != nil {
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return fmt.Errorf("failed to unmarshal response: %v %s", err, body)
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}
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return nil
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}
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func URLEncodeResponse(resp interface{}, encoder Encoder) (string, error) {
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values := make(map[string][]string)
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err := encoder.Encode(resp, values)
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if err != nil {
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return "", err
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}
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v := url.Values(values)
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return v.Encode(), nil
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}
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func StartServer(ctx context.Context, port string) {
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server := &http.Server{Addr: port}
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go func() {
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if err := server.ListenAndServe(); err != http.ErrServerClosed {
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log.Fatalf("ListenAndServe(): %v", err)
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}
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}()
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go func() {
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<-ctx.Done()
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err := server.Shutdown(ctx)
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log.Fatalf("Shutdown(): %v", err)
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}()
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}
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