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// SPDX-License-Identifier: GPL-3.0-or-later
package web
import (
"encoding/base64"
"fmt"
"io"
"net/http"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/agent/executable"
"github.com/netdata/netdata/go/go.d.plugin/pkg/buildinfo"
)
// Request is the configuration of the HTTP request.
// This structure is not intended to be used directly as part of a module's configuration.
// Supported configuration file formats: YAML.
type Request struct {
// URL specifies the URL to access.
URL string `yaml:"url" json:"url"`
// Body specifies the HTTP request body to be sent by the client.
Body string `yaml:"body" json:"body"`
// Method specifies the HTTP method (GET, POST, PUT, etc.). An empty string means GET.
Method string `yaml:"method" json:"method"`
// Headers specifies the HTTP request header fields to be sent by the client.
Headers map[string]string `yaml:"headers" json:"headers"`
// Username specifies the username for basic HTTP authentication.
Username string `yaml:"username" json:"username"`
// Password specifies the password for basic HTTP authentication.
Password string `yaml:"password" json:"password"`
// ProxyUsername specifies the username for basic HTTP authentication.
// It is used to authenticate a user agent to a proxy server.
ProxyUsername string `yaml:"proxy_username" json:"proxy_username"`
// ProxyPassword specifies the password for basic HTTP authentication.
// It is used to authenticate a user agent to a proxy server.
ProxyPassword string `yaml:"proxy_password" json:"proxy_password"`
}
// Copy makes a full copy of the Request.
func (r Request) Copy() Request {
headers := make(map[string]string, len(r.Headers))
for k, v := range r.Headers {
headers[k] = v
}
r.Headers = headers
return r
}
var userAgent = fmt.Sprintf("Netdata %s.plugin/%s", executable.Name, buildinfo.Version)
// NewHTTPRequest returns a new *http.Requests given a Request configuration and an error if any.
func NewHTTPRequest(cfg Request) (*http.Request, error) {
var body io.Reader
if cfg.Body != "" {
body = strings.NewReader(cfg.Body)
}
req, err := http.NewRequest(cfg.Method, cfg.URL, body)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", userAgent)
if cfg.Username != "" || cfg.Password != "" {
req.SetBasicAuth(cfg.Username, cfg.Password)
}
if cfg.ProxyUsername != "" && cfg.ProxyPassword != "" {
basicAuth := base64.StdEncoding.EncodeToString([]byte(cfg.ProxyUsername + ":" + cfg.ProxyPassword))
req.Header.Set("Proxy-Authorization", "Basic "+basicAuth)
}
for k, v := range cfg.Headers {
switch k {
case "host", "Host":
req.Host = v
default:
req.Header.Set(k, v)
}
}
return req, nil
}
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