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Javascript or Java ? this is two different language...
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Javascript or Java ? this is two different language...

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HI, I am new to CORS. I have a question about it.<br />
I have a js post call to web service API , but got an error in my local:<br />
&quot;Access to XMLHttpRequest at 'https://xyz.com/X/gettoken' from origin '<a href="http://localhost:8080'" rel="ugc">http://localhost:8080'</a> has been blocked by CORS policy: The 'Access-Control-Allow-Orig<wbr />in' header contains multiple values '<a href="http://localhost:8080" rel="ugc">http://localhost:8080</a>, *', but only one is allowed. &quot;<br />
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I see in my java code, there are some code &nbsp;which add &quot;resp.header(&quot;Access-Contr<wbr />ol-Allow-O<wbr />rigin&quot;, &quot;*&quot;)&quot;. I removed it, and compiled and run, still get the same result. <br />
Any inputs will be appreciated!
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HI, I am new to CORS. I have a question about it.
I have a js post call to web service API , but got an error in my local:
"Access to XMLHttpRequest at 'https://xyz.com/X/gettoken' from origin 'http://localhost:8080' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:8080, *', but only one is allowed. "

I see in my java code, there are some code  which add "resp.header("Access-Control-Allow-Origin", "*")". I removed it, and compiled and run, still get the same result. 
Any inputs will be appreciated!

Cross-origin resource sharing

Cross-origin resource sharing (CORS)

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.