WSO2 API Manager - Sample PizzaShackAPI is not working - wso2

Question

I am new to WSO2 API Manager. I followed the Quick Start Guide to learn by deploying sample PizzaShackAPI.
https://docs.wso2.com/display/AM210/Quick+Start+Guide
As I click "Try It Out!", I am not getting the correct response as mentioned in the guide.
I am getting the below response and there is no log in the console initially.
Response Code
0
Response Headers
{
"error": "no response from server"
}
After I added Self Signed Certificate in Firefox as Add Exception, I am getting the below error in the console,
[2017-03-01 15:06:51,309] ERROR - SourceHandler I/O error: An established connection was aborted by the software in your
host machine
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:197)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
at org.apache.http.nio.reactor.ssl.SSLIOSession.receiveEncryptedData(SSLIOSession.java:371)
I guess it may be a certificate configuration issue. Please help me to resolve this issue.
I tried with creating my own API. Facing the same issue.

Answer 1

Error message "error": "no response from server" on API console is mostly due to CORS error. Could you please check your browser console and see the error there, Most likely you will see error related to cors.
Note: these changes are not advised for production environment, for production environment you want to provide all relevant information instead of allow all (*)
To allow all headers and origin edit repository/conf/api-manager.xml and change values for following:
<Access-Control-Allow-Headers>*</Access-Control-Allow-Headers>
<Access-Control-Allow-Origin>*</Access-Control-Allow-Origin>
Second change to allow all host name and avoid any certificate host name validation.
Edit /repository/conf/axis2/axis2.xml and un comment HostnameVerifier and change value to AllowAll.
<parameter name="HostnameVerifier">AllowAll</parameter>
Restart API Manager and test again.