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Re: Feature request: new callback to report http chunks boundaries
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From: Dan Fandrich via curl-library <curl-library_at_cool.haxx.se>
Date: Sun, 20 Jun 2021 13:22:12 -0700
On Sun, Jun 20, 2021 at 05:34:00PM +0200, Daniel F via curl-library wrote:
> I am writing app which will receive updates (in JSON format) from server.
> Server uses HTTP chunked transfer encoding. I also use TLS to encrypt
> transmission. If I read curl code in lib/http_chunks.c correctly, library
> guarantees that contents of multiple chunks is not mixed when callback
> registered with CURLOPT_WRITEFUNCTION option is called. However opposite is
> not true, write callback may be called multiple times for one chunk. This
> means that I need some extra callback in order to detect chunk boundaries,
> but I do not see such callback in the code. I think of two possible
> callbacks: one called before first part of a chunk is delivered to the app
> (it may have chunk size as a param), and another called after last part of
> chunk is delivered to the app. Any of them would be fine for me. Could you
> add it?
HTTP chunking is part of HTTP and should be transparent to the application. It
sounds like what you're doing is a layer violation. What is the purpose of
knowing chunking boundaries?
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Received on 2021-06-20
Date: Sun, 20 Jun 2021 13:22:12 -0700
On Sun, Jun 20, 2021 at 05:34:00PM +0200, Daniel F via curl-library wrote:
> I am writing app which will receive updates (in JSON format) from server.
> Server uses HTTP chunked transfer encoding. I also use TLS to encrypt
> transmission. If I read curl code in lib/http_chunks.c correctly, library
> guarantees that contents of multiple chunks is not mixed when callback
> registered with CURLOPT_WRITEFUNCTION option is called. However opposite is
> not true, write callback may be called multiple times for one chunk. This
> means that I need some extra callback in order to detect chunk boundaries,
> but I do not see such callback in the code. I think of two possible
> callbacks: one called before first part of a chunk is delivered to the app
> (it may have chunk size as a param), and another called after last part of
> chunk is delivered to the app. Any of them would be fine for me. Could you
> add it?
HTTP chunking is part of HTTP and should be transparent to the application. It
sounds like what you're doing is a layer violation. What is the purpose of
knowing chunking boundaries?
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Received on 2021-06-20