http.go

Documentation: discovery/utils

     1  /*
     2   * P2PFaaS - A framework for FaaS Load Balancing
     3   * Copyright (c) 2019. Gabriele Proietti Mattia <pm.gabriele@outlook.com>
     4   *
     5   * This program is free software: you can redistribute it and/or modify
     6   * it under the terms of the GNU General Public License as published by
     7   * the Free Software Foundation, either version 3 of the License, or
     8   * (at your option) any later version.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
    17   */
    18  
    19  package utils
    20  
    21  import (
    22  	"discovery/log"
    23  	"net/http"
    24  )
    25  
    26  const UserAgentMachine = "Machine"
    27  
    28  type Header struct {
    29  	Field   string
    30  	Payload string
    31  }
    32  
    33  type ErrorHttpCannotCreateRequest struct{}
    34  
    35  func (e ErrorHttpCannotCreateRequest) Error() string {
    36  	return "cannot create http request."
    37  }
    38  
    39  func HttpMachineGet(client *http.Client, host string, headers []Header) (*http.Response, error) {
    40  	req, err := http.NewRequest("GET", host, nil)
    41  	if req == nil {
    42  		return nil, ErrorHttpCannotCreateRequest{}
    43  	}
    44  	req.Header.Add("User-Agent", UserAgentMachine)
    45  	for _, header := range headers {
    46  		req.Header.Add(header.Field, header.Payload)
    47  	}
    48  
    49  	res, err := client.Do(req)
    50  	if err != nil {
    51  		log.Log.Errorf("Error while making request to %s", host)
    52  	}
    53  
    54  	return res, err
    55  }
    56
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