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Netstrings (1997)

cr.yp.to

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Re: Netstrings (1997)

#4
post #3

Seems like a coherent, sensible proposal, as one might expect from djb. Any notable protocols use them?

BitTorrent's bencoding format, used in .torrent files, effectively uses netstrings-- but without the trailing commas, so it uses "5:hello" to represent filenames and similar.

Re: Netstrings (1997)

#6
Tagged Netstrings (tnetstrings) was a related proposal from 15 years ago or so. It replaces the comma with a single-character type definition so you can do JSON-like objects with a couple of recursive types: you had ',', '#', '^', '!', and '~' for strings, integers, floats, booleans, and nulls, then ']' and '}' for lists and dictionaries.

Most of the links have bitrotted and I don't think it ever got much traction, but I did always like how simple it was. There's a copy someone grabbed of the original spec here: https://raw.githubusercontent.com/ged/tnetstrings.info/refs/...

Re: Netstrings (1997)

#7
post #3

Seems like a coherent, sensible proposal, as one might expect from djb. Any notable protocols use them?

Php serialized uses

   s:size:value;
For strings, which is pretty similar. Size is in bytes.

Re: Netstrings (1997)

#8

Tagged Netstrings (tnetstrings) was a related proposal from 15 years ago or so. It replaces the comma with a single-character type definition so you can do JSON-like objects with a couple of recursive types: you had ',', '#', '^', '!', and '~' for strings, integers, floats, booleans, and nulls, then ']' and '}' for lists and dictionaries. Most of the links have bitrotted and I don't think it ever got much traction, b…

Here's a HTML viewer (not mine; use it at your own risk): https://html-preview.github.io/?url=https://raw.githubuserco...>

Re: Netstrings (1997)

#10

    if (scanf("%9lu",&len) 999999999 bytes is bad */
    if (getchar() != ':') barf();
    buf = malloc(len + 1);       /* malloc(0) is not portable */
    if (!buf) barf();
    if (fread(buf,1,len,stdin) 
Ah, the wonders of error-handling in C. Also, I wonder what's wrong with

    buf = malloc(len ? len : 1);
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