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client.go
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client.go
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/*
* Copyright (C) 2015-2019 Virgil Security Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* (1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* (2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* (3) Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Lead Maintainer: Virgil Security Inc. <support@virgilsecurity.com>
*/
package client
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"path"
)
type HTTPClient interface {
Do(*http.Request) (*http.Response, error)
}
type VirgilHTTPClient struct {
Client HTTPClient
Address string
}
func (vc *VirgilHTTPClient) Send(
method string,
urlPath string,
payload interface{},
respObj interface{},
header http.Header,
) (headers http.Header, cookie string, virgilAPIErr *VirgilAPIError) {
var body []byte
if payload != nil {
var err error
body, err = json.Marshal(payload)
if err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: marshal payload: %v", err)}
}
}
u, err := url.Parse(vc.Address)
if err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: URL parse: %v", err)}
}
u.Path = path.Join(u.Path, urlPath)
req, err := http.NewRequest(method, u.String(), bytes.NewReader(body))
if err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: new request: %v", err)}
}
if len(header) != 0 {
req.Header = header
}
client := vc.getHTTPClient()
resp, err := client.Do(req)
if err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: send request: %v", err)}
}
// nolint: errcheck
defer resp.Body.Close()
body, err = ioutil.ReadAll(resp.Body)
if err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: read body: %v", err)}
}
for _, c := range resp.Cookies() {
if c.Name == "gosession" {
cookie = c.Value
}
}
if resp.StatusCode/100 == 2 {
if respObj == nil {
return resp.Header, cookie, nil
}
if err = json.Unmarshal(body, respObj); err != nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: unmarshal response object: %v", err)}
}
return resp.Header, cookie, nil
}
if len(body) == 0 {
return nil, cookie, &VirgilAPIError{StatusCode: resp.StatusCode}
}
var httpErr *VirgilAPIError
err = json.Unmarshal(body, httpErr)
if err == nil {
return nil, cookie, &VirgilAPIError{Message: fmt.Sprintf("VirgilHTTPClient.Send: unmarshal response object: %v", err)}
}
return nil, cookie, httpErr
}
type VirgilAPIError struct {
StatusCode int
Code int `json:"code"`
Message string `json:"message"`
Errors []ErrorField `json:"errors,omitempty"`
}
func (err VirgilAPIError) Error() string {
return fmt.Sprintf("Virgil API error {code: %v message: %v errors: %v}", err.Code, err.Message, err.Errors)
}
type ErrorField struct {
Code int `json:"code"`
Message string `json:"message"`
Field string `json:"field"`
}
func (err ErrorField) String() string {
return fmt.Sprintf("Virgil Error field {code: %v message: %v field: %v}", err.Code, err.Message, err.Field)
}
func (vc *VirgilHTTPClient) getHTTPClient() HTTPClient {
if vc.Client != nil {
return vc.Client
}
return http.DefaultClient
}