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server.go
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server.go
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package rpc
import (
"context"
"encoding/json"
"errors"
"fmt"
"strconv"
"github.com/dowlandaiello/GoP2P/common"
nodeProto "github.com/dowlandaiello/GoP2P/internal/rpc/proto/node"
"github.com/dowlandaiello/GoP2P/types/node"
"github.com/dowlandaiello/GoP2P/upnp"
)
// Server - GoP2P RPC server
type Server struct{}
// NewNode - node.NewNode RPC handler
func (server *Server) NewNode(ctx context.Context, req *nodeProto.GeneralRequest) (*nodeProto.GeneralResponse, error) {
if req.Address == "localhost" { // Check for invalid address
address, err := common.GetExtIPAddrWithoutUPnP() // Fetch IP
if err == nil { // Check for errors
req.Address = address // Set to request value
}
}
node, err := node.NewNode(req.Address, req.IsBootstrap) // Init node
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
go upnp.ForwardPortSilent(3000) // Forward node port
currentDir, err := common.GetCurrentDir() // Fetch working directory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
err = node.WriteToMemory(currentDir) // Write node to memory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
marshaledVal, err := json.Marshal(node) // Marshal initialized variable
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
return &nodeProto.GeneralResponse{Message: fmt.Sprintf("\n%s", string(marshaledVal))}, nil // Return response
}
// StartListener - node.StartListener RPC handler
func (server *Server) StartListener(ctx context.Context, req *nodeProto.GeneralRequest) (*nodeProto.GeneralResponse, error) {
currentDir, err := common.GetCurrentDir() // Fetch current directory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
node, err := node.ReadNodeFromMemory(currentDir) // Read node from memory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, errors.New("Node not attached") // Return found error
}
go node.StartListener(int(req.Port)) // Start Listener
return &nodeProto.GeneralResponse{Message: fmt.Sprintf("\nStarted listener with host :%s", strconv.Itoa(int(req.Port)))}, nil // Return response
}
// LogNode - node.LogNode RPC handler
func (server *Server) LogNode(ctx context.Context, req *nodeProto.GeneralRequest) (*nodeProto.GeneralResponse, error) {
currentDir, err := common.GetCurrentDir() // Fetch working directory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
node, err := node.ReadNodeFromMemory(currentDir) // Fetch node from working directory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
node.LogNode() // Log node
return &nodeProto.GeneralResponse{Message: ""}, nil // Return response
}
/* BEGIN IO HANDLERS */
// WriteToMemory - node.WriteToMemory RPC handler
func (server *Server) WriteToMemory(ctx context.Context, req *nodeProto.GeneralRequest) (*nodeProto.GeneralResponse, error) {
currentDir, err := common.GetCurrentDir() // Fetch current directory
if err != nil {
return &nodeProto.GeneralResponse{}, err // Return found error
}
node, err := node.ReadNodeFromMemory(currentDir) // Read node from memory
if err != nil {
return &nodeProto.GeneralResponse{}, errors.New("Node not attached") // Return found error
}
err = node.WriteToMemory(req.Path) // Write to memory
if err != nil { // Check for errors
return &nodeProto.GeneralResponse{}, err // Return found error
}
return &nodeProto.GeneralResponse{Message: "\nWrote to directory " + req.Path}, nil // Return response
}
// ReadFromMemory - node.ReadFromMemory RPC handler
func (server *Server) ReadFromMemory(ctx context.Context, req *nodeProto.GeneralRequest) (*nodeProto.GeneralResponse, error) {
currentDir, err := common.GetCurrentDir() // Fetch current directory
if err != nil {
return &nodeProto.GeneralResponse{}, err // Return found error
}
node, err := node.ReadNodeFromMemory(req.Path) // Read node from memory
if err != nil {
return &nodeProto.GeneralResponse{}, errors.New("Node not found at directory " + req.Path) // Return found error
}
err = node.WriteToMemory(currentDir) // Attach to current directory
if err != nil { // Check for error
return &nodeProto.GeneralResponse{}, err // Return found error
}
return &nodeProto.GeneralResponse{Message: "\nRead from directory " + req.Path}, nil // Return response
}
/* END IO HANDLERS */