You can also explicitly supply the value of the content-length as a
keyword argument to http-request. I use a wrapper that adds this:
:content-length (if content
(babel:string-size-in-octets content :encoding :utf-8)
0)
I agree, though, that the default behavior can be surprising. It has
bitten me, too, and I've seen at least one other library built-on
Drakma that didn't account for it, either.
-austin
--
Austin Haas
Pet Tomato, Inc.
http://pettomato.com
On Fri Mar 09 10:24 , Robert Brown wrote:
> A co-worker of mine had some problems today using Drakma to POST a STRING
> containing non-ASCII characters encoded as UTF-8. He was doing something
> equivalent to:
>
> (http-request "http://zappa.com/favicon.ico";
> :method :post
> :content (concatenate 'string
> "hello" (string #\white_square) "world")
> :external-format-out :utf-8)
>
> which ends up setting the Content-Length header value to 11, which is the
> LENGTH in characters of the string being sent.
>
> The documentation says that "if content is a sequence, Drakma will use LENGTH
> to determine its length and will use the result for the 'Content-Length'
> header
> sent to the server," so Drakma is working as documented.
>
> Also, I think I understand why this behavior is the default. You don't want
> to
> scan a content string in order to determine what its length will be in octets
> once it has been encoded. My co-worker could have used a vector of type
> (unsigned-byte 8) to hold his UTF-8 encoded data.
>
> However, I think the current Drakma behavior may be a mistake. People who
> want
> high performance are probably manipulating encoded strings as vectors of
> (unsigned-byte 8). It's the casual users, those sending strings, who are the
> ones most likely to be bitten by the default behavior, but only when their
> strings contain non-ASCII characters.
>
> bob
>
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>
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