Ajax cross-domain access (from Tomcat8 to Apache)

1. Put the following files in the root directory of Tomcat

Apache-tomcat-8.0.12x64\webapps\root

ClientAccessPolicy.xml file

<?XML version= "1.0" encoding= "Utf-8"?><Access-policy>  <cross-domain-access>    <Policy>      <Allow-fromhttp-request-headers="*">        <DomainURI="*"/>      </Allow-from>      <grant-to>        <ResourcePath="/"include-subpaths= "true"/>      </grant-to>    </Policy>  </cross-domain-access></Access-policy>

Crossdomain.xml

<? XML version= "1.0" ?>    < Cross-domain-policy >    <  domain= "*"/></cross-domain-policy  >

2. Add the following code to the project's Web. xml

Apache-tomcat-8.0.12x64\webapps\test\web-inf

Xml

<?XML version= "1.0" encoding= "Iso-8859-1"?><Web-appxmlns= "HTTP://JAVA.SUN.COM/XML/NS/J2EE"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xsi:schemalocation= "Http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"version= "2.4">  <Display-name></Display-name>  <welcome-file-list>    <Welcome-file>Index.html</Welcome-file>  </welcome-file-list>    <Filter>      <Filter-name>Corsfilter</Filter-name>      <Filter-class>Org.apache.catalina.filters.CorsFilter</Filter-class>      <Init-param>        <Param-name>Cors.allowed.origins</Param-name>        <Param-value>*</Param-value>      </Init-param>      <Init-param>        <Param-name>Cors.allowed.methods</Param-name>        <Param-value>Get,post,head,options,put</Param-value>      </Init-param>      <Init-param>        <Param-name>Cors.allowed.headers</Param-name>        <Param-value>Content-type,x-requested-with,accept,origin,access-control-request-method,access-control-request-headers</Param-value>      </Init-param>      <Init-param>        <Param-name>Cors.exposed.headers</Param-name>        <Param-value>Access-control-allow-origin,access-control-allow-credentials</Param-value>      </Init-param>      <Init-param>        <Param-name>Cors.support.credentials</Param-name>        <Param-value>True</Param-value>      </Init-param>      <Init-param>        <Param-name>Cors.preflight.maxage</Param-name>        <Param-value>10</Param-value>      </Init-param>    </Filter>    <filter-mapping>      <Filter-name>Corsfilter</Filter-name>      <Url-pattern>/*</Url-pattern>    </filter-mapping>    <!--<filter> <filter-name>CorsFilter</filter-name> <filter-class>org.apache.catalina . filters. corsfilter</filter-class> </filter> <filter-mapping> <filter-name>corsfilter</filter -name> <url-pattern>/*</url-pattern> </filter-mapping> -</Web-app>

3. In Apache httpd.conf, uncomment the LoadModule headers_module modules/mod_headers.so earlier

Apache\conf

4. Modify the Apache Httpd.conf <Directory> config section

Apache\conf

<directory "d:/project/resource/" >
AllowOverride None
Require all granted
Header Set Access-control-allow-origin *
Header set access-control-allow-headers "*"
Header set Access-control-allow-methods "POST, GET, OPTIONS, DELETE, PUT"
</Directory>

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Ajax can be used to access data from Apache in the Tomcat Project's HTML page

var url = http://127.0.0.1/resource/JavaScript/gis/Z_QPF_20140831000000.F060.bin.bz2;

functionLoadData () {varXHR =NewXMLHttpRequest (); if("Withcredentials"inchxhr) {Xhr.open ("Get", url,true); Console.log ("Withcredentials"); } Else if(typeofXdomainrequest! = "undefined") {XHR=Newxdomainrequest (); Xhr.open ("Get", URL); Console.log ("Xdomainrequest"); } Else{XHR=NULL; } Xhr.responsetype= "Arraybuffer"; Xhr.onload=function() {        if( This. Status = = 200) {            varArrayBuffer = This. Response; //......        }    }}

Ajax cross-domain access (from Tomcat8 to Apache)