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Editorial Team
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Asked: 2026-05-22T01:20:46+00:00

I have got a question about http:request(…) in erlang. When I retrieve a page

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I have got a question about http:request(...) in erlang.

When I retrieve a page using the above command (for example the main page of an apache webserver), I have in my headers list the value {"content-length","177"}, which seems right, because using byte_size(…) on the body of the page I get the same result..this suggests me that the size of the page is 177 bytes.

I checked this result using Tools -> page info option in firefox, but it says that the size is 146 bytes…can you tell me why there is this difference?

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1 Answer

  1. Editorial Team

    In The HTTP specification (RFC 2616) Section 14. is the definition of the content-lenght header:

    14.13 Content-Length

    The Content-Length entity-header field
    indicates the size of the entity-body,
    in decimal number of OCTETs, sent to
    the recipient or, in the case of the
    HEAD method, the size of the
    entity-body that would have been sent
    had the request been a GET.

    So either Firefox is wrong, got a different content or shows the size for a different definition of “size”.

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