storj/pkg/piecestore/rpc/server/readerwriter.go

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Added rpc server (#40) * Added piecestore * gofmt * Added requested changes * Added cli * Removed ranger because I wanted something that can stand alone * Add example of http server using piece store * Changed piecestore code to make it more optial for error handelling * Merged with piecestore * Added missing package * Forgot io import * gofmt * gofmt * Forgot io * Make path by hash exported * updated to simplify again whoops * Updated server to work real good * Forgot ampersand * Updated to match FilePiece * Merged in cam's delete code * Remove unused io * Added RPC code * Give the download request a reader * Removed http server stuff; changed receive stream to say io.reader * Added expiration date to shardInfo * Change all instances of Shard to Piece; change protobuf name; moved client insance to outside functions * added ttl info request * Move scripts to http server pr; added close method for Retrieve api * added rpc server tests for getting piece meta data and retrieval routes * Resolved linter errors, moved to prc server to pkg, updated go.mod to use latest protobuf * Imported cams test * Bump gometalinter deadline * WIP adding tests * added tests for store and delete routes * Add changes as requested by Kaloyan, also cleaned up some code * Get the code actually working whoops * More cleanup * Separating database calls from api.go * need to rename expiration * Added some changes requested by JT * Fix read size * Fixed total amount to read * added tests * Simplify protobuf, add store tests, edited api to handle invalid stores properly, return errors instead of messages * Moved rpc client and server to piece store * Moved piecestore protobuf to the /protos folder * Cleaned up messages * Clean up linter errors * Added missing sqlite import * Add ability to do iterative reads and writes to pstore * Incrementally read data * Fix linter and import errors * Solve linter Error * Change return types * begin test refactor * refactored to implement only 1 db connection, moved SQLite row checking into separate function and removed defer on rows.Close(), fixed os.tempDir in rpc_test.go * Cleaning up tests * Added retrieve tests * refactored delete tests * Deleted old tests * Updated cmd/piecestore to reflect changes to piecestore * Refactored server tests and server/client store code * gofmt * WIP implementing TTL struct * Read 4k at a time when Retrieving * implemented ttl struct * Accidentally removed fpiece dependency? * Double resolve merge conflict * Moved client to the examples since it is an example * Change hash to id in protobuf. TODO: Change client and server to reflect these changes * Update client and protobuf * changed hash to id * Handle eof properly in retrieve * Id -> ID * forgot to change import for client after moving * Moved client and server main to examples * Made changes requested by JT * checkEntries is now private, created currentTime variable for checkEntries, added defer rows.Close() * Print not fatal * Handle overflow when reading from server * added const IDLength * removed types from comments * Add reader/writer for download data from and uploading data to server * goimports and comments * fixed nits, casts, added OK const, DBCleanup now exits program on error * Add stream reader and writer for server * Fix errors * i beforee except after c lol * customizable data dir * Forgot to rename variable * customizable data dir * Handle closing of server stream properly * linter * pass on inserting the same data twice * linter * linter * Do the easy things JT asked for * Handle overflow from reads properly; handle custom db path * Handle overflow for server stream read; TODO Combine server and client stream reads * Allow for TTL of 0 to stay forever * Make Client cleaner for user
2018-06-02 19:14:59 +01:00
// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package server
import (
pb "storj.io/storj/protos/piecestore"
)
// StreamWriter -- Struct for writing piece to server upload stream
type StreamWriter struct {
stream pb.PieceStoreRoutes_RetrieveServer
}
// Write -- Write method for piece upload to stream
func (s *StreamWriter) Write(b []byte) (int, error) {
// Write the buffer to the stream we opened earlier
if err := s.stream.Send(&pb.PieceRetrievalStream{Size: int64(len(b)), Content: b}); err != nil {
return 0, err
}
return len(b), nil
}
// StreamReader -- Struct for Retrieving data from server
type StreamReader struct {
stream pb.PieceStoreRoutes_StoreServer
overflowData []byte
}
// Read -- Read method for piece download from stream
func (s *StreamReader) Read(b []byte) (int, error) {
// Use overflow data if we have it
if len(s.overflowData) > 0 {
n := copy(b, s.overflowData) // Copy from overflow into buffer
s.overflowData = s.overflowData[n:] // Overflow is set to whatever remains
return n, nil
}
// Receive data from server stream
msg, err := s.stream.Recv()
if err != nil {
return 0, err
}
// Copy data into buffer
n := copy(b, msg.Content)
// If left over data save it into overflow variable for next read
if n < len(msg.Content) {
s.overflowData = b[len(b):]
}
return n, nil
}