github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/requests/request.go (about)

     1  /*
     2   * Copyright (C) 2017 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package requests
    19  
    20  import (
    21  	"bytes"
    22  	"encoding/json"
    23  	"fmt"
    24  	"net/http"
    25  	"net/url"
    26  
    27  	"github.com/mysteriumnetwork/node/identity"
    28  )
    29  
    30  const (
    31  	mysteriumAgentName       = "goclient-v0.1"
    32  	authenticationHeaderName = "Authorization"
    33  	authenticationSchemaName = "Signature"
    34  )
    35  
    36  // NewGetRequest generates http Get request
    37  func NewGetRequest(apiURI, path string, params url.Values) (*http.Request, error) {
    38  	if params != nil {
    39  		path = fmt.Sprintf("%v?%v", path, params.Encode())
    40  	}
    41  	return newRequest(http.MethodGet, apiURI, path, nil)
    42  }
    43  
    44  // NewPostRequest generates http Post request
    45  func NewPostRequest(apiURI, path string, requestBody interface{}) (*http.Request, error) {
    46  	encodedBody, err := encodeToJSON(requestBody)
    47  	if err != nil {
    48  		return nil, err
    49  	}
    50  	return newRequest(http.MethodPost, apiURI, path, encodedBody)
    51  }
    52  
    53  // NewSignedRequest signs payload and generates http request
    54  func NewSignedRequest(httpMethod, apiURI, path string, requestBody interface{}, signer identity.Signer) (*http.Request, error) {
    55  	var encodedBody []byte = nil
    56  	if requestBody != nil {
    57  		var err error
    58  		encodedBody, err = encodeToJSON(requestBody)
    59  		if err != nil {
    60  			return nil, err
    61  		}
    62  	}
    63  
    64  	signature, err := getBodySignature(encodedBody, signer)
    65  	if err != nil {
    66  		return nil, err
    67  	}
    68  
    69  	req, err := newRequest(httpMethod, apiURI, path, encodedBody)
    70  	if err != nil {
    71  		return nil, err
    72  	}
    73  
    74  	req.Header.Add(authenticationHeaderName, authenticationSchemaName+" "+signature.Base64())
    75  
    76  	return req, nil
    77  }
    78  
    79  // NewSignedGetRequest signs empty message and generates http Get request
    80  func NewSignedGetRequest(apiURI, path string, signer identity.Signer) (*http.Request, error) {
    81  	return NewSignedRequest(http.MethodGet, apiURI, path, nil, signer)
    82  }
    83  
    84  // NewSignedPostRequest signs payload and generates http Post request
    85  func NewSignedPostRequest(apiURI, path string, requestBody interface{}, signer identity.Signer) (*http.Request, error) {
    86  	return NewSignedRequest(http.MethodPost, apiURI, path, requestBody, signer)
    87  }
    88  
    89  // NewSignedPutRequest signs payload and generates http Put request
    90  func NewSignedPutRequest(apiURI, path string, requestBody interface{}, signer identity.Signer) (*http.Request, error) {
    91  	return NewSignedRequest(http.MethodPut, apiURI, path, requestBody, signer)
    92  }
    93  
    94  func encodeToJSON(value interface{}) ([]byte, error) {
    95  	return json.Marshal(value)
    96  }
    97  
    98  func newRequest(method, apiURI, path string, body []byte) (*http.Request, error) {
    99  	url := apiURI
   100  	if len(path) > 0 {
   101  		url = fmt.Sprintf("%v/%v", apiURI, path)
   102  	}
   103  	req, err := http.NewRequest(method, url, bytes.NewBuffer(body))
   104  	if err != nil {
   105  		return nil, err
   106  	}
   107  	req.Header.Set("User-Agent", mysteriumAgentName)
   108  	req.Header.Set("Content-Type", "application/json")
   109  	req.Header.Set("Accept", "application/json")
   110  
   111  	return req, nil
   112  }
   113  
   114  func getBodySignature(encodedBody []byte, signer identity.Signer) (identity.Signature, error) {
   115  	var message = encodedBody
   116  	if message == nil {
   117  		message = []byte("")
   118  	}
   119  
   120  	return signer.Sign(message)
   121  }