localhost:8545 400 bad request









up vote
0
down vote

favorite












I study solidity in my localhost
I run ganache-cli
and i can see

...
...



Gas Price



20000000000



Gas Limit



6721975



Listening on 127.0.0.1:8545



but http://localhost:8545/
400 Bad Request



web3.js:4348 Failed to load http://localhost:8545/: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'null' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.






localhost blockchain solidity







share|improve this question





















  • You should look in to other topic here
    – Jonas Gavėnavičius
    Nov 8 at 15:17










  • You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
    – nikos fotiadis
    Nov 8 at 15:50














up vote
0
down vote

favorite












I study solidity in my localhost
I run ganache-cli
and i can see

...
...



Gas Price



20000000000



Gas Limit



6721975



Listening on 127.0.0.1:8545



but http://localhost:8545/
400 Bad Request



web3.js:4348 Failed to load http://localhost:8545/: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'null' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.






localhost blockchain solidity







share|improve this question





















  • You should look in to other topic here
    – Jonas Gavėnavičius
    Nov 8 at 15:17










  • You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
    – nikos fotiadis
    Nov 8 at 15:50












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I study solidity in my localhost
I run ganache-cli
and i can see

...
...



Gas Price



20000000000



Gas Limit



6721975



Listening on 127.0.0.1:8545



but http://localhost:8545/
400 Bad Request



web3.js:4348 Failed to load http://localhost:8545/: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'null' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.






localhost blockchain solidity







share|improve this question













I study solidity in my localhost
I run ganache-cli
and i can see

...
...



Gas Price



20000000000



Gas Limit



6721975



Listening on 127.0.0.1:8545



but http://localhost:8545/
400 Bad Request



web3.js:4348 Failed to load http://localhost:8545/: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'null' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.






localhost blockchain solidity




localhost blockchain solidity






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 8 at 15:10









Jeong hyunseok

13




13











  • You should look in to other topic here
    – Jonas Gavėnavičius
    Nov 8 at 15:17










  • You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
    – nikos fotiadis
    Nov 8 at 15:50
















  • You should look in to other topic here
    – Jonas Gavėnavičius
    Nov 8 at 15:17










  • You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
    – nikos fotiadis
    Nov 8 at 15:50















You should look in to other topic here
– Jonas Gavėnavičius
Nov 8 at 15:17




You should look in to other topic here
– Jonas Gavėnavičius
Nov 8 at 15:17












You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
– nikos fotiadis
Nov 8 at 15:50




You don't really send the request yourself sou cannot add headers to it.There is a discussion about this on web3.js issues page. You can find it here: github.com/ethereum/web3.js/issues/1802
– nikos fotiadis
Nov 8 at 15:50

















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