func newLocalBatchStore(cs chunks.ChunkStore) *localBatchStore {
return &localBatchStore{
cs: cs,
unwrittenPuts: newOrderedChunkCache(),
vbs: types.NewValidatingBatchingSink(cs, types.NewTypeCache()),
hints: types.Hints{},
hashes: hash.HashSet{},
mu: &sync.Mutex{},
}
}
func handleWriteValue(w http.ResponseWriter, req *http.Request, ps URLParams, cs chunks.ChunkStore) {
d.PanicIfTrue(req.Method != "POST", "Expected post method.")
reader := bodyReader(req)
defer func() {
// Ensure all data on reader is consumed
io.Copy(ioutil.Discard, reader)
reader.Close()
}()
tc := types.NewTypeCache()
vbs := types.NewValidatingBatchingSink(cs, tc)
vbs.Prepare(deserializeHints(reader))
chunkChan := make(chan *chunks.Chunk, 16)
go chunks.DeserializeToChan(reader, chunkChan)
var bpe chunks.BackpressureError
for c := range chunkChan {
if bpe == nil {
bpe = vbs.Enqueue(*c)
} else {
bpe = append(bpe, c.Hash())
}
// If a previous Enqueue() errored, we still need to drain chunkChan
// TODO: what about having DeserializeToChan take a 'done' channel to stop it?
}
if bpe == nil {
bpe = vbs.Flush()
}
if bpe != nil {
w.WriteHeader(httpStatusTooManyRequests)
w.Header().Add("Content-Type", "application/octet-stream")
writer := respWriter(req, w)
defer writer.Close()
serializeHashes(writer, bpe.AsHashes())
return
}
w.WriteHeader(http.StatusCreated)
}
