Using meteor HTTP to connect to ethereum node

Question

I am trying to copy the following curl command using meteor HTTP

curl -X POST --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}' http://localhost:8545

The command is from here

This is what I tried:

HTTP.call('POST',"http://localhost:8545",{data:{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}},function(res,error){console.log(res)})

but it returns null. The curl command gives {"jsonrpc":"2.0","id":83,"result":"(the blocknumber)"}

HTTP.call('POST',"localhost:8545",{data:{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}},function(error,res){console.log(res)}) — iiro
– iiro, Commented Jul 3, 2017 at 20:39
@iiro I got this error: XMLHttpRequest cannot load localhost:8545. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https. — Joe
– Joe, Commented Jul 4, 2017 at 9:51
Did you put http:// before localhost? The SO have made a link of the url and the htt not showing up. — iiro
– iiro, Commented Jul 4, 2017 at 10:23
If I add http:// to the command you gave it becomes identical to the one in my post doesn't it? — Joe
– Joe, Commented Jul 4, 2017 at 10:30

iiro · Accepted Answer · 2017-07-04 18:08:10Z

1

You have to swap error and res params.

HTTP.call('POST',"http://localhost:8545",{data:{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}},function(error, res){console.log(res)})

edited Jul 4, 2017 at 18:08

answered Jul 4, 2017 at 15:48

iiro

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