public void service()

in functions/http/parse-content-type/src/main/java/functions/ParseContentType.java [41:86]
34 lines of code
8 McCabe index (conditional complexity)

  public void service(HttpRequest request, HttpResponse response)
      throws IOException {
    String name = null;

    // Default values avoid null issues (with switch/case) and exceptions from get() (optionals)
    String contentType = request.getContentType().orElse("");

    switch (contentType) {
      case "application/json":
        // '{"name":"John"}'
        JsonObject body = gson.fromJson(request.getReader(), JsonObject.class);
        if (body.has("name")) {
          name = body.get("name").getAsString();
        }
        break;
      case "application/octet-stream":
        // 'John', stored in a Buffer
        name = new String(Base64.getDecoder().decode(request.getInputStream().readAllBytes()),
            StandardCharsets.UTF_8);
        break;
      case "text/plain":
        // 'John'
        name = request.getReader().readLine();
        break;
      case "application/x-www-form-urlencoded":
        // 'name=John' in the body of a POST request (not the URL)
        Optional<String> nameParam = request.getFirstQueryParameter("name");
        if (nameParam.isPresent()) {
          name = nameParam.get();
        }
        break;
      default:
        // Invalid or missing "Content-Type" header
        response.setStatusCode(HttpURLConnection.HTTP_UNSUPPORTED_TYPE);
        return;
    }

    // Verify that a name was provided
    if (name == null) {
      response.setStatusCode(HttpURLConnection.HTTP_BAD_REQUEST);
    }

    // Respond with a name
    var writer = new PrintWriter(response.getWriter());
    writer.printf("Hello %s!", name);
  }