lihm

fix a %%EOF bug

1

According to ISO 32000 3.4.4 File Trailer, `%%EOF` marker appear somewhere within the last 1024 bytes of the file. https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf

Custom bufSize to avoid bytes.makeSlice

2

Now the bufSize is 512. bytes.makeSlice will happen when the json size is larger than bufSize. If most of my json are larger than 512, I want to set it...