Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' he
2017-12-28 17:01
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解决方案：在服务器端的Web.config文件中添加一下内容。
如果报错：
未能加载类型“WebServiceDemo.MyHttpModule”。去掉
即可。
如果想选定的网站可能跨域访问，修改配置如下:
<system.web> <!--提供Web服务访问方式--> <webServices> <protocols> <add name="HttpSoap"/> <add name="HttpPost"/> <add name="HttpGet"/> <add name="Documentation"/> </protocols> </webServices> </system.web>
<configuration> <system.webServer> <httpProtocol> <customHeaders> <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/> <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type"/> <add name="Access-Control-Allow-Origin" value="*" /> </customHeaders> </httpProtocol> <modules> <add name="MyHttpModule" type="WebServiceDemo.MyHttpModule"/> </modules> </system.webServer> </configuration>
如果报错：
未能加载类型“WebServiceDemo.MyHttpModule”。去掉
<modules> <add name="MyHttpModule" type="WebServiceDemo.MyHttpModule"/> </modules>
即可。
如果想选定的网站可能跨域访问，修改配置如下:
<add name="Access-Control-Allow-Origin" value="http://domain1.com, http://domain2.com" />
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