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// Copyright (c) 2018-2023, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package client
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
jsonresp "github.com/sylabs/json-resp"
)
func (c *Client) apiGet(ctx context.Context, path string) (objJSON []byte, err error) {
c.Logger.Logf("apiGet calling %s", path)
return c.doGETRequest(ctx, path)
}
func (c *Client) apiCreate(ctx context.Context, url string, o interface{}) (objJSON []byte, err error) {
c.Logger.Logf("apiCreate calling %s", url)
return c.doPOSTRequest(ctx, url, o)
}
func (c *Client) apiUpdate(ctx context.Context, url string, o interface{}) (objJSON []byte, err error) {
c.Logger.Logf("apiUpdate calling %s", url)
return c.doPUTRequest(ctx, url, o)
}
func (c *Client) doGETRequest(ctx context.Context, path string) (objJSON []byte, err error) {
return c.commonRequestHandler(ctx, "GET", path, nil, []int{http.StatusOK})
}
func (c *Client) doPUTRequest(ctx context.Context, path string, o interface{}) (objJSON []byte, err error) {
return c.commonRequestHandler(ctx, "PUT", path, o, []int{http.StatusOK, http.StatusNoContent})
}
func (c *Client) doPOSTRequest(ctx context.Context, path string, o interface{}) (objJSON []byte, err error) {
return c.commonRequestHandler(ctx, "POST", path, o, []int{http.StatusOK, http.StatusCreated})
}
func (c *Client) doDeleteRequest(ctx context.Context, path string) (objJSON []byte, err error) {
return c.commonRequestHandler(ctx, "DELETE", path, nil, []int{http.StatusOK})
}
func (c *Client) commonRequestHandler(ctx context.Context, method string, path string, o interface{}, acceptedStatusCodes []int) (objJSON []byte, err error) {
var payload io.Reader
// only PUT and POST methods
if method != "GET" && method != "DELETE" {
s, err := json.Marshal(o)
if err != nil {
return []byte{}, fmt.Errorf("error encoding object to JSON:\n\t%w", err)
}
payload = bytes.NewBuffer(s)
}
// split url containing query into component pieces (path and raw query)
u, err := url.Parse(path)
if err != nil {
return []byte{}, fmt.Errorf("error parsing url:\n\t%w", err)
}
req, err := c.newRequest(ctx, method, u.Path, u.RawQuery, payload)
if err != nil {
return []byte{}, fmt.Errorf("error creating %s request:\n\t%w", method, err)
}
res, err := c.HTTPClient.Do(req)
if err != nil {
return []byte{}, fmt.Errorf("error making request to server:\n\t%w", err)
}
defer res.Body.Close()
// check http status code
if res.StatusCode == http.StatusNotFound {
return []byte{}, ErrNotFound
}
if !isValidStatusCode(res.StatusCode, acceptedStatusCodes) {
err := jsonresp.ReadError(res.Body)
if err != nil {
return []byte{}, fmt.Errorf("request did not succeed: %w", err)
}
return []byte{}, fmt.Errorf("%w: request did not succeed: http status code: %d", errHTTP, res.StatusCode)
}
objJSON, err = io.ReadAll(res.Body)
if err != nil {
return []byte{}, fmt.Errorf("error reading response from server:\n\t%w", err)
}
return objJSON, nil
}
func isValidStatusCode(statusCode int, acceptedStatusCodes []int) bool {
for _, value := range acceptedStatusCodes {
if value == statusCode {
return true
}
}
return false
}
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