# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS o "Cross-Origin Resource Sharing"</a> se refiere a situaciones en las que un frontend que se ejecuta en un navegador tiene código JavaScript que se comunica con un backend, y el backend está en un "origen" diferente al frontend.

## Origen { #origin }

                    locationBuf.append(contextPath);
                }
                locationBuf.append('/');
                locationBuf.append(servletPath.substring(path.length()));
                boolean append = false;
                final Map<String, String[]> parameterMap = new HashMap<>(req.getParameterMap());

    private int pos;
    private int markPos;

    JavadocScanner(String rawCommentText) {
        pushText(rawCommentText);
    }

    @Override
    public String toString() {
        return input.substring(pos);
    }

    public boolean isEmpty() {
        return pos == input.length();
    }

    public void mark() {
        markPos = pos;
    }

    public void next() {
        next(1);
    }

                            active = false;
                            selector = selector.substring(1);
                        } else if (token.charAt(0) == '+') {
                            selector = selector.substring(1);
                        }
                    }
                    boolean optional = false;

# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS or "Cross-Origin Resource Sharing"</a> refers to the situations when a frontend running in a browser has JavaScript code that communicates with a backend, and the backend is in a different "origin" than the frontend.

## Origin { #origin }

            if (ci > 0) {
                domain = username.substring(ci + 1);
                username = username.substring(0, ci);
            } else {
                ci = username.indexOf('\\');
                if (ci > 0) {
                    domain = username.substring(0, ci);
                    username = username.substring(ci + 1);
                }
            }
        }

# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">Понятие CORS или "Cross-Origin Resource Sharing"</a> относится к ситуациям, при которых запущенный в браузере фронтенд содержит JavaScript-код, который взаимодействует с бэкендом, находящимся на другом "источнике" ("origin").

## Источник { #origin }

            if (cal.getTime().after(lastModified)) {
                checkForUpdates = true;
            }
        } else if (updatePolicy.startsWith(UPDATE_POLICY_INTERVAL)) {
            String s = updatePolicy.substring(UPDATE_POLICY_INTERVAL.length() + 1);
            int minutes = Integer.parseInt(s);
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.MINUTE, -minutes);

      return httpUrl.toString();
    }

    @FromJson HttpUrl urlFromJson(String urlString) {
      if (urlString.startsWith("wss:")) urlString = "https:" + urlString.substring(4);
      if (urlString.startsWith("ws:")) urlString = "http:" + urlString.substring(3);
      return HttpUrl.get(urlString);
    }
  }

            final String value = decodeUrlAsName(url.substring(9), true);
            return abbreviateSite("\\\\" + value.replace('/', '\\'));
        }
        if (url.startsWith("file:")) {
            final String value = decodeUrlAsName(url.substring(5), true);
            if (value.length() > 2 && value.charAt(2) == ':') {
                // Windows
                return abbreviateSite(value.substring(1).replace('/', '\\'));
            }