Error message & blank display while ZH-cn locale in ai2

本文链接：https://blog.youkuaiyun.com/xatsoft/article/details/91046059

本文介绍如何在AppInventor中修改登录功能，以支持多语言环境。通过编辑源码中的两个关键文件，可以实现登录界面和错误信息的多语言显示，提升用户体验。

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需要修改源码2个文件：

1.appinventor-sources\appinventor\appengine\war\login.jsp

<center><p><a href="/login/sendlink" style="text-decoration:none;">${passwordclickhereLabel}</a></p></center>

修改为：

<center><p><a href="/login/sendlink?locale=<%= locale %>" style="text-decoration:none;">${passwordclickhereLabel}</a></p></center>

2.appinventor-sources\appinventor\appengine\src\com\google\appinventor\server\LoginServlet.java

1.修改调用 fail()，大概有11处。

fail(req, resp, ************);

修改为：

fail(req, resp, locale,**********);

2.修改 fail()函数，1处

private void fail(HttpServletRequest req, HttpServletResponse resp, String error) throws IOException {
resp.sendRedirect("/login/?error=" + sanitizer.sanitize(error));
return;
}

修改为：

private void fail(HttpServletRequest req, HttpServletResponse resp,String locale, String error) throws IOException {
resp.sendRedirect("/login/?locale="+ locale +"&error=" + URLEncoder.encode(sanitizer.sanitize(error)));
return;
}

3.修改sendlink页面

} else if (page.equals("sendlink")) {
out = setCookieOutput(userInfo, resp);
out.println("<head><title>" + bundle.getString("requestreset") + "</title></head>\n");
out.println("<body>\n");
out.println("<h1>" + bundle.getString("requestlink") + "</h1>\n");
out.println("<p>" + bundle.getString("requestinstructions") + "</p>\n");
out.println("<form method=POST action=\"" + req.getRequestURI() + "\">\n");
out.println(bundle.getString("enteremailaddress") + ": <input type=text name=email value=\"\" size=\"35\"><br />\n");
out.println("<p></p>");
out.println("<input type=submit value=\"" + bundle.getString("sendlink") + "\" style=\"font-size: 300%;\">\n");
out.println("</form>\n");
return;
}

替换为：

} else if (page.equals("sendlink")) {
out = setCookieOutput(userInfo, resp);
out.println("<head><title>" + bundle.getString("requestreset") + "</title></head>\n");
out.println("<body>\n");
out.println("<h1>" + bundle.getString("requestlink") + "</h1>\n");
out.println("<p>" + bundle.getString("requestinstructions") + "</p>\n");
out.println("<form method=POST action=\"" + req.getRequestURI() + "\">\n");
out.println(bundle.getString("enteremailaddress") + ": <input type=text name=email value=\"\" size=\"35\"><br />\n");
out.println("<p><input type=hidden name=locale value=\""+ locale + "\"></p>");
out.println("<input type=submit value=\"" + bundle.getString("sendlink") + "\" style=\"font-size: 300%;\">\n");
out.println("</form>\n");
return;
}

4.linksent加上语言

resp.sendRedirect("/login/linksent/");

替换为：

resp.sendRedirect("/login/linksent/?locale=" + locale);