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package rpc
import (
"net/http"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/xeth"
)
var rpchttplogger = logger.NewLogger("RPC-HTTP")
const (
jsonrpcver = "2.0"
maxSizeReqLength = 1024 * 1024 // 1MB
)
// JSONRPC returns a handler that implements the Ethereum JSON-RPC API.
func JSONRPC(pipe *xeth.XEth, dataDir string) http.Handler {
var json JsonWrapper
api := NewEthereumApi(pipe, dataDir)
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
rpchttplogger.DebugDetailln("Handling request")
if req.ContentLength > maxSizeReqLength {
jsonerr := &RpcErrorObject{-32700, "Request too large"}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
return
}
reqParsed, reqerr := json.ParseRequestBody(req)
switch reqerr.(type) {
case nil:
break
case *DecodeParamError:
jsonerr := &RpcErrorObject{-32602, reqerr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
return
case *InsufficientParamsError:
jsonerr := &RpcErrorObject{-32602, reqerr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
return
case *ValidationError:
jsonerr := &RpcErrorObject{-32602, reqerr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
return
default:
jsonerr := &RpcErrorObject{-32700, "Could not parse request"}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: nil, Error: jsonerr})
return
}
var response interface{}
reserr := api.GetRequestReply(&reqParsed, &response)
switch reserr.(type) {
case nil:
break
case *NotImplementedError:
jsonerr := &RpcErrorObject{-32601, reserr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Error: jsonerr})
return
case *InsufficientParamsError:
jsonerr := &RpcErrorObject{-32602, reserr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Error: jsonerr})
return
case *ValidationError:
jsonerr := &RpcErrorObject{-32602, reserr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Error: jsonerr})
return
default:
jsonerr := &RpcErrorObject{-32603, reserr.Error()}
json.Send(w, &RpcErrorResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Error: jsonerr})
return
}
rpchttplogger.DebugDetailf("Generated response: %T %s", response, response)
json.Send(w, &RpcSuccessResponse{JsonRpc: jsonrpcver, ID: reqParsed.ID, Result: response})
})
}
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