1.用visual studio 2015 建立一个 web api 应用程序.记住这是一个 web api 应用. 2.新建一个web api . 3.用C#访问,代码如下:[没有问题,返回正确] var requestJson = JsonConvert.SerializeObject(args); HttpContent httpContent = new StringContent(requestJson); httpContent.Headers.ContentType = new M…

js跨域访问提示错误:XMLHttpRequest cannot load http://...... No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 解决方法: 1.如果请求的url是aspx页面,则需要在aspx页面中添加代码:Response.AddHeader("Access-Contro…

运行tomcat 提示如下错误: The requested resource () is not available的解决方案 出现这个问题,接口肯定是没问题了.问题可能有两个: 1.文件设置无法访问: 2.缺少架包: 解决办法:1.只需要修改Tomcat服务器中web.xml <init-param>   <param-name>listings</param-name> <param-value>false(将其该为true)</param-va…

自己为了测试servlet,用MyEclipse2015写了一个简单的登录程序. 1.登录页面index.jsp. <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String lUserName = (String)session.getAttribute("iUserName"); %> <!DOC…

今天做一个AJAX案例时,浏览器监控到如下错误: XMLHttpRequest cannot load http://54.169.69.60:8081/process_message. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://54.169.69.60' is therefore not allowed access. 网站地址是 http://54.…

ajax请求node.js接口出现了如下的错误: XMLHttpRequest cannot load http://xxx.xxx.xx.xx:8888/getTem?cityId=110105&date=2015-03-04. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 百度了一下,原来是…

默认情况下ajax请求是有同源策略,限制了不同域请求的响应. 例子:http://localhost:23160/HtmlPage.html 请求不同源API http://localhost:22852/api/values, What is "Same Origin"? Two URLs have the same origin if they have identical schemes, hosts, and ports. (RFC 6454) These two URLs h…

The requested resource (/demo10/loginBean) is not available. <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" x…

在 tomcat/webapps/ROOT/ 下建立一个软连接文件ln -s /home/ubuntu/report report   再到report软连接目录里建立个 report.html通过浏览器访问这个report.html时就出错.. 错误如下: HTTP Status 404 - report/report.html-------------------------------------------------------------------------------- typ…

在本地用ajax跨域访问请求时报错: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access. 查了一翻资料,发现原来是新W3C标准中是这样规定的: 最新的W3C标准里是这么实现HTTP跨域请求的, Cross-Origin Resource Sharing 简单的来说,就…