func AppendLogChunk(db database.Database, artifact *model.Artifact, logChunk *model.LogChunk) *HttpError {
if artifact.State != model.APPENDING {
return NewHttpError(http.StatusBadRequest, fmt.Sprintf("Unexpected artifact state: %s", artifact.State))
}
if logChunk.Size <= 0 {
return NewHttpError(http.StatusBadRequest, "Invalid chunk size %d", logChunk.Size)
}
if logChunk.Content == "" {
return NewHttpError(http.StatusBadRequest, "Empty content string")
}
if int64(len(logChunk.Content)) != logChunk.Size {
return NewHttpError(http.StatusBadRequest, "Content length does not match indicated size")
}
// Find previous chunk in DB - append only
if nextByteOffset, err := db.GetLastByteSeenForArtifact(artifact.Id); err != nil {
return NewHttpError(http.StatusInternalServerError, "Error while checking for previous byte range: %s", err)
} else if nextByteOffset != logChunk.ByteOffset {
return NewHttpError(http.StatusBadRequest, "Overlapping ranges detected, expected offset: %d, actual offset: %d", nextByteOffset, logChunk.ByteOffset)
}
logChunk.ArtifactId = artifact.Id
// Expand artifact size - redundant after above change.
if artifact.Size < logChunk.ByteOffset+logChunk.Size {
artifact.Size = logChunk.ByteOffset + logChunk.Size
if err := db.UpdateArtifact(artifact); err != nil {
return NewHttpError(http.StatusInternalServerError, err.Error())
}
}
if err := db.InsertLogChunk(logChunk); err != nil {
return NewHttpError(http.StatusBadRequest, "Error updating log chunk: %s", err)
}
return nil
}