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package main
import (
"context"
"encoding/json"
"fmt"
"html/template"
"io"
"net/http"
"os"
"strings"
"github.com/sirupsen/logrus"
"golang.org/x/oauth2"
"github.com/zitadel/oidc/v3/pkg/client/profile"
)
var client = http.DefaultClient
func main() {
keyPath := os.Getenv("KEY_PATH")
issuer := os.Getenv("ISSUER")
port := os.Getenv("PORT")
scopes := strings.Split(os.Getenv("SCOPES"), " ")
if keyPath != "" {
ts, err := profile.NewJWTProfileTokenSourceFromKeyFile(context.TODO(), issuer, keyPath, scopes)
if err != nil {
logrus.Fatalf("error creating token source %s", err.Error())
}
client = oauth2.NewClient(context.Background(), ts)
}
http.HandleFunc("/jwt-profile", func(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" {
tpl := `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login</title>
</head>
<body>
<form method="POST" action="/jwt-profile" enctype="multipart/form-data">
<label for="key">Select a key file:</label>
<input type="file" accept=".json" id="key" name="key">
<button type="submit">Get Token</button>
</form>
</body>
</html>`
t, err := template.New("login").Parse(tpl)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
err = t.Execute(w, nil)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
} else {
err := r.ParseMultipartForm(4 << 10)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
file, _, err := r.FormFile("key")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer file.Close()
key, err := io.ReadAll(file)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
ts, err := profile.NewJWTProfileTokenSourceFromKeyFileData(context.TODO(), issuer, key, scopes)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
client = oauth2.NewClient(context.Background(), ts)
token, err := ts.Token()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
data, err := json.Marshal(token)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Write(data)
}
})
http.HandleFunc("/test", func(w http.ResponseWriter, r *http.Request) {
tpl := `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Test</title>
</head>
<body>
<form method="POST" action="/test">
<label for="url">URL for test:</label>
<input type="text" id="url" name="url" width="200px">
<button type="submit">Test Token</button>
</form>
{{if .URL}}
<p>
Result for {{.URL}}: {{.Response}}
</p>
{{end}}
</body>
</html>`
err := r.ParseForm()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
testURL := r.Form.Get("url")
var data struct {
URL string
Response any
}
if testURL != "" {
data.URL = testURL
data.Response, err = callExampleEndpoint(client, testURL)
if err != nil {
data.Response = err
}
}
t, err := template.New("login").Parse(tpl)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
err = t.Execute(w, data)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
})
lis := fmt.Sprintf("127.0.0.1:%s", port)
logrus.Infof("listening on http://%s/", lis)
logrus.Fatal(http.ListenAndServe("127.0.0.1:"+port, nil))
}
func callExampleEndpoint(client *http.Client, testURL string) (any, error) {
req, err := http.NewRequest("GET", testURL, nil)
if err != nil {
return nil, err
}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("http status not ok: %s %s", resp.Status, body)
}
if strings.HasPrefix(resp.Header.Get("content-type"), "text/plain") {
return string(body), nil
}
return body, err
}
|
