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client.go
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client.go
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package gofiery
import (
"bytes"
"encoding/json"
"fmt"
"io"
"log"
"net"
"net/http"
"os"
"time"
)
type FieryClient struct {
ServerAddr *net.TCPAddr
APIVersion int
EndpointPrefix string
Username string
Password string
Key string
Cookie string
HTTPClient http.Client
}
type authPayload struct {
username string
password string
apikey string
}
type Response struct {
time time.Time
data responseData[any]
}
type responseData[T any] struct {
kind string
item T
}
// NewFieryClient creates a new client to communicate with a Fiery API server.
func NewFieryClient(addr string, version int, prefix string, user string, pass string, key string) *FieryClient {
sa, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
panic(err)
}
return &FieryClient{
ServerAddr: sa,
APIVersion: version,
EndpointPrefix: prefix,
Username: user,
Password: pass,
Key: key,
HTTPClient: http.Client{Timeout: 30 * time.Second},
}
}
func (fc *FieryClient) postflight(res *http.Response, do func()) {
if !fc.ResponseIsJSON(res) {
_, err := fmt.Fprintf(os.Stderr, "gofiery: HTTP error: endpoint returned %v but expected %v\n", res.Header.Get("Content-Type"), "application/json")
if err != nil {
return
}
os.Exit(0)
}
if fc.ResponseIsOK(res) {
do()
} else {
_, err := fmt.Fprintf(os.Stderr, "gofiery: HTTP error: endpoint returned status code %v but expected %v\n", res.StatusCode, http.StatusOK)
if err != nil {
return
}
os.Exit(0)
}
}
// Endpoint returns from uri the full URL path to the API endpoint.
// For use in requesting the API.
func (fc *FieryClient) Endpoint(uri string) string {
return fc.ServerAddr.String() + fc.EndpointPrefix + uri
}
// ResponseIsOK checks that an HTTP response returned a 200 status code.
// Returns false otherwise.
func (fc *FieryClient) ResponseIsOK(res *http.Response) bool {
return res.StatusCode == http.StatusOK
}
// ResponseIsJSON checks that the HTTP response res has a content type
// of "application/json". Returns false otherwise.
func (fc *FieryClient) ResponseIsJSON(res *http.Response) bool {
return res.Header.Get("Content-Type") == "application/json"
}
// Login initiates the login process against the Fiery API by providing
// the username, password and API key from fc to the destination server.
// If the login is successful, the session cookie is then stored in fc
// for use in authentication-required endpoints.
func (fc *FieryClient) Login() {
payload, err := json.Marshal(authPayload{username: fc.Username, password: fc.Password, apikey: fc.Key})
if err != nil {
_, err := fmt.Fprint(os.Stderr, "gofiery: unable to marshal json authentication payload")
if err != nil {
return
}
panic(err)
}
r := bytes.NewReader(payload)
req, _ := http.NewRequest(http.MethodPost, fc.Endpoint("login"), r)
req.Header.Set("Content-Type", "application/json")
res, err := fc.HTTPClient.Do(req)
if err != nil {
_, err := fmt.Fprintf(os.Stderr, "gofiery: error making http request: %s\n", err)
if err != nil {
return
}
}
fc.postflight(res, func() { fc.Cookie = res.Header.Get("Set-Cookie") })
}
// Logout initiates the logout process against the Fiery API.
// If the request is successful, the session cookie given by
// the login process is removed from the client.
func (fc *FieryClient) Logout() {
if fc.Cookie == "" {
_, err := fmt.Fprint(os.Stderr, "gofiery: missing cookie in client. did you login?")
if err != nil {
return
}
}
r := bytes.NewReader([]byte{})
req, _ := http.NewRequest(http.MethodPost, fc.Endpoint("logout"), r)
req.Header.Set("Cookie", fc.Cookie)
res, err := fc.HTTPClient.Do(req)
if err != nil {
_, err := fmt.Fprintf(os.Stderr, "gofiery: error making http request: %s\n", err)
if err != nil {
return
}
}
fc.postflight(res, func() { fc.Cookie = "" })
}
// Run the request to a Fiery API endpoint and place the result in a reference of resultContainer
func (fc *FieryClient) Run(endpoint string, method string) *Response {
var data Response
r := bytes.NewReader([]byte{})
if fc.Cookie == "" {
_, err := fmt.Fprint(os.Stderr, "gofiery: missing cookie in client. did you login?")
if err != nil {
return nil
}
}
req, _ := http.NewRequest(method, fc.Endpoint(endpoint), r)
req.Header.Set("Cookie", fc.Cookie)
res, err := fc.HTTPClient.Do(req)
if err != nil {
_, err := fmt.Fprintf(os.Stderr, "gofiery: error making http request: %s\n", err)
if err != nil {
return nil
}
}
fc.postflight(res, func() {
defer func(Body io.ReadCloser) {
err := Body.Close()
if err != nil {
log.Fatal("gofiery: unable to close response body")
}
}(res.Body)
body, err := io.ReadAll(res.Body)
if err != nil {
_, err := fmt.Fprintf(os.Stderr, "gofiery: error reading http response: %s\n", err)
if err != nil {
return
}
}
err = json.Unmarshal(body, &data)
if err != nil {
_, err := fmt.Fprintf(os.Stderr, "gofiery: could not parse json response: %s\n", err)
if err != nil {
return
}
}
})
return &data
}