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|
package middleware
import (
"bytes"
"fmt"
"net/http"
"path"
"text/template"
)
func SwaggerUIOAuth2Callback(opts SwaggerUIOpts, next http.Handler) http.Handler {
opts.EnsureDefaults()
pth := opts.OAuthCallbackURL
tmpl := template.Must(template.New("swaggeroauth").Parse(swaggerOAuthTemplate))
buf := bytes.NewBuffer(nil)
_ = tmpl.Execute(buf, &opts)
b := buf.Bytes()
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
if path.Join(r.URL.Path) == pth {
rw.Header().Set("Content-Type", "text/html; charset=utf-8")
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(b)
return
}
if next == nil {
rw.Header().Set("Content-Type", "text/plain")
rw.WriteHeader(http.StatusNotFound)
_, _ = rw.Write([]byte(fmt.Sprintf("%q not found", pth)))
return
}
next.ServeHTTP(rw, r)
})
}
const (
swaggerOAuthTemplate = `
<!DOCTYPE html>
<html lang="en">
<head>
<title>{{ .Title }}</title>
</head>
<body>
<script>
'use strict';
function run () {
var oauth2 = window.opener.swaggerUIRedirectOauth2;
var sentState = oauth2.state;
var redirectUrl = oauth2.redirectUrl;
var isValid, qp, arr;
if (/code|token|error/.test(window.location.hash)) {
qp = window.location.hash.substring(1).replace('?', '&');
} else {
qp = location.search.substring(1);
}
arr = qp.split("&");
arr.forEach(function (v,i,_arr) { _arr[i] = '"' + v.replace('=', '":"') + '"';});
qp = qp ? JSON.parse('{' + arr.join() + '}',
function (key, value) {
return key === "" ? value : decodeURIComponent(value);
}
) : {};
isValid = qp.state === sentState;
if ((
oauth2.auth.schema.get("flow") === "accessCode" ||
oauth2.auth.schema.get("flow") === "authorizationCode" ||
oauth2.auth.schema.get("flow") === "authorization_code"
) && !oauth2.auth.code) {
if (!isValid) {
oauth2.errCb({
authId: oauth2.auth.name,
source: "auth",
level: "warning",
message: "Authorization may be unsafe, passed state was changed in server. The passed state wasn't returned from auth server."
});
}
if (qp.code) {
delete oauth2.state;
oauth2.auth.code = qp.code;
oauth2.callback({auth: oauth2.auth, redirectUrl: redirectUrl});
} else {
let oauthErrorMsg;
if (qp.error) {
oauthErrorMsg = "["+qp.error+"]: " +
(qp.error_description ? qp.error_description+ ". " : "no accessCode received from the server. ") +
(qp.error_uri ? "More info: "+qp.error_uri : "");
}
oauth2.errCb({
authId: oauth2.auth.name,
source: "auth",
level: "error",
message: oauthErrorMsg || "[Authorization failed]: no accessCode received from the server."
});
}
} else {
oauth2.callback({auth: oauth2.auth, token: qp, isValid: isValid, redirectUrl: redirectUrl});
}
window.close();
}
if (document.readyState !== 'loading') {
run();
} else {
document.addEventListener('DOMContentLoaded', function () {
run();
});
}
</script>
</body>
</html>
`
)
|
