Re: TS API won't return header data of > 4K

[Nick Kew]

On Fri, 19 Apr 2013 22:54:47 +0100
Nick Kew <n...@apache.org> wrote:


> I'll attach a mini demo-plugin that reproduces the problem.
> The essence of it can be boiled down to:

Magic sauce here.

This fails:
    TSHttpTxnClientReqGet(txnp, &bufp, &hdr_loc);
    iobufp = TSIOBufferCreate();
    TSHttpHdrPrint(bufp, hdr_loc, iobufp);
    readerp = TSIOBufferReaderAlloc(iobufp);

This works:
    TSHttpTxnClientReqGet(txnp, &bufp, &hdr_loc);
    iobufp = TSIOBufferCreate();
    readerp = TSIOBufferReaderAlloc(iobufp);
    TSHttpHdrPrint(bufp, hdr_loc, iobufp);

We can get away with losing the buffer in the iobuf
provided the reader buf was set *before* trashing it.  Ouch!

I thought I got the first originally from an example plugin,
though I can't find it in current versions.  It is still there
in proxy/InkAPITest.cc at line 3445:

    TSIOBuffer iobuf = TSIOBufferCreate();
    TSHttpHdrPrint(bufp1, hdr_loc1, iobuf);
    TSIOBufferReader iobufreader = TSIOBufferReaderAlloc(iobuf);

Hmmm ....

-- 
Nick Kew