.. _whatsnew_changes_7.4:
%%%%%%%%%%%%%%%%%%%%%%
Changes in Varnish 7.4
%%%%%%%%%%%%%%%%%%%%%%
For information about updating your current Varnish deployment to the
new version, see :ref:`whatsnew_upgrading_7.4`.
A more detailed and technical account of changes in Varnish, with
links to issues that have been fixed and pull requests that have been
merged, may be found in the `change log`_.
.. _change log: https://github.com/varnishcache/varnish-cache/blob/master/doc/changes.rst
varnishd
========
HTTP/2 header field validation is now more strict with respect to
allowed characters.
The :ref:`vcl-step(7)` manual page has been added to document the VCL
state machines.
VCL Tracing
~~~~~~~~~~~
VCL tracing now needs to be explicitly activated by setting the
``req.trace`` or ``bereq.trace`` VCL variables, which are initialized
from the ``feature +trace`` flag. Only if the trace variables are set
will ``VCL_trace`` log records be generated.
Consequently, ``VCL_trace`` has been removed from the default
``vsl_mask``, so any trace records will be emitted by
default. ``vsl_mask`` can still be used to filter ``VCL_trace``
records.
To trace ``vcl_init {}`` and ``vcl_fini {}``, set the ``feature
+trace`` flag while the vcl is loaded/discarded.
Parameters
~~~~~~~~~~
The ``startup_timeout`` parameter now specifically replaces
``cli_timeout`` for the initial startup only.
Changes to VCL
==============
The ``Content-Length`` and ``Transfer-Encoding`` headers are now
protected. For the common use case of ``unset
(be)req.http.Content-Length`` to dismiss a body, ``unset
(be)req.body`` should be used.
varnishlog
==========
Object creation failures by the selected storage engine are now logged
under the ``Error`` tag as ``Failed to create object from %s
%s``.
varnishadm
==========
Tabulation of the ``vcl.list`` CLI output has been modified slightly.
varnishstat
===========
The counter ``MAIN.http1_iovs_flush`` has been added to track the
number of premature ``writev()`` calls due to an insufficient number
of IO vectors. This number is configured through the ``http1_iovs``
parameter for client connections and implicitly defined by the amount
of free workspace for backend connections.
varnishtest
===========
The basename of the test directory is now available as the ``vtcid``
macro to serve as a unique string across concurrently running tests.
The ``varnishd_args_prepend`` and ``varnishd_args_append`` macros have
been added to allow addition of arguments to ``varnishd`` invocations
before and after those added by ``varnishtest`` by default.
``User-Agent`` request and ``Server`` response headers are now created
by default, containing the respective client and server name. The
``txreq -nouseragent`` and ``txresp -noserver`` options disable
addition of these headers.
Changes for developers and VMOD authors
=======================================
Call sites of VMOD functions and methods can now be restricted to
built-in subroutines using the ``$Restrict`` stanza in the VCC file.
``.vcc`` files of VMODs are now installed to
``/usr/share/varnish/vcc`` (or equivalent) to enable re-use by other
tools like code editors.
API Changes
~~~~~~~~~~~
The ``varnishapi`` version has been increased to 3.1 and the
``VSHA256_*``, ``VENC_Encode_Base64()`` and ``VENC_Decode_Base64()``
functions are now exposed.
In ``struct vsmwseg`` and ``struct vsm_fantom``, the ``class`` member
has been renamed to ``category``.
The ``VSB_quote_pfx()`` (and, consequently, ``VSB_quote()``) function
no longer produces ``\v`` for a vertical tab. This improves
compatibility with JSON.
Additions to varnish C header files
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``PTOK()`` macro has been added to ``vas.h`` to simplify error
checking of ``pthread_*`` POSIX functions.
The ``v_cold`` macro has been added to add ``__attribute__((cold))``
on compilers supporting it. It is used for ``VRT_fail()`` to mark
failure code paths as cold.
The utility macros ``ALLOC_OBJ_EXTRA()`` and ``ALLOC_FLEX_OBJ()`` have
been added to ``miniobj.h`` to simplify allocation of objects larger
than a struct and such with a flexible array.
*eof*
Henceforth, whatever our philosopher says about Matter will apply to extension and to extension alone. It cannot be apprehended by sight, nor by hearing, nor by smell, nor by taste, for it is neither colour, nor sound, nor odour, nor juice. Neither can it be touched, for it is not a body, but it becomes corporeal on being blended with sensible qualities. And, in a later essay, he describes it as receiving all things and letting them depart again without retaining the slightest trace of their presence.483 Why then, it may be asked, if Plotinus meant extension, could he not say so at once, and save us all this trouble in hunting out his meaning? There were very good reasons why he should not. In the first place, he wished to express himself, so far as possible, in Aristotelian phraseology, and this was incompatible with the reduction of Matter to extension. In the next place, the idea of an infinite void had been already appropriated by the Epicureans, to whose system he was bitterly opposed. And, finally, the extension of ordinary327 experience had not the absolute generality which was needed in order to bring Matter into relation with that ultimate abstraction whence, like everything else, it has now to be derived. That the millionaire was genuine, ¡°in person and not a caricature,¡± as Dick put it, was evident. Both the nurse, his relative, and his wife, were chatting with him as Jeff delivered the heavy packed ball made up of the gum. 233 "I guess not," said Landor, tolerantly, as he turned[Pg 106] his horse over to his orderly; "but, anyway," he added to Ellton, "we had a picnic¡ªof a sort." Si, unable to think of anything better, went with him. The train had stopped on a switch, and seemed likely to rust fast to the rails, from the way other trains were going by in both directions. The bridge gang, under charge of a burly, red-faced young Englishman, was in the rear car, with their tools, equipments, bedding and cooking utensils. THE DEACON HAS SOME EXPERIENCES WITH THE QUADRUPED. "You are not within a mile of the truth. I know it. Look here: I believe that is Gen. Rosecrans's own cow. She's gone, and I got an order to look around for her. I've never seen her, but from the description given me I believe that's she. Who brought her here?" "Deacon, these brothers and sisters who have come here with me to-night are, like myself, deeply interested in the moral condition of the army, where we all have sons or kinsmen. Now, can't you sit right there and tell us of your observations and experiences, as a Christian man and father, from day to day, of every day that you were down there? Tell us everything, just as it happened each day, that we may be able to judge for ourselves." HAS AN ENCOUNTER WITH THE PROVOST-MARSHAL. "Wonder which one o' them is the 200th Injianny's?" said Si to Shorty. "And your mother, and Harry?" The daughter must be the girl who was talking to him now. She sat on a little stool by the fire, and had brought out some sewing. "Over at Grandturzel¡ªcan't see wot's burning from here. Git buckets and come!" These things, however, gave little concern to the worthy who commanded the Kentish division. Tyler, though an excellent blacksmith, possessed few of the qualities requisite for forming a good general. Provided there was no very sensible diminution in the number of his followers, he cared not a straw for the score or two who, after quarrelling, or perhaps fighting, withdrew in such disgust that they vowed rather to pay the full tax for ever than submit to the insolence of the rebels. One man could fight as well as another, reasoned he; and, provided he was obeyed, what mattered it by whom. Dick went and Tom came¡ªit was sure to be all one in the end. But this burst of indignation soon passed away, and upon the suggestion of the prudent Sir Robert Hailes, he sent an evasive answer, with a command that the Commons should attend him at Windsor on the Sunday following. That it was a stratagem to gain entrance to the Tower, was the opinion of several, but, after much discussion, it was decided that the man should be admitted, and that the monk should be exhibited merely to intimidate the rebels, until the result of this promised communication should be known. HoMEŮͬÐÔÁµcbcb
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