This policy obeys robots.txt but ignores meta nofollow. We're
increasingly frequently encountering sites which fail to be archived
properly due to usage of this meta tag but where the robots.txt file
contains reasonable rules. In many cases it seems to be unintentional,
and we've even had questions from webmasters asking why archiving was
failing when they were explicitly allowing us in robots.txt.
This ensures that when we later compare the context in processEmbed()
we don't need to deal with variants like srcSet or SRCSET. Note that
we're already sometimes lowercasing it later in HTMLLinkContext.get().
Fixes#477.
- instead of "borrowing" the configured proxy from
the fetchHttp bean, use proxy values defined via
global options, to avoid interference with other
jobs running in parallel (or at least make them
explicit).
The "fetchHttp" bean also uses these settings,
if no bean specific settings are used.
- remove the "enableDnsOverHttpResolves", and rely
on a non-empty "dnsOverHttpServer" value to signal
that DoH should be used.
- use the "DohResolver" from the dnsjava library
to make DoH lookups
- to enable and configure it, add two new
properties
* "enableDnsOverHttpResolves" (boolean)
* "dnsOverHttpServer" URL to the DoH Server
- as one use case for DoH is being located
behind a firewall, also support using a proxy
to access the DoH server; the proxy from
the FetchHTTP bean is reused in that case
Fixes#211
We should only crawl sitemaps and sitemap links if they are in the
primary SURT scope. Otherwise we'll start crawling the sitemaps of
every site an embedded resource is pulled in from even when they
should be out of scope.
Fixes#469
testSocksProxy() is failing on the GitHub action CI runs but I can't
reproduce the issue locally. I'm just guessing this is what's causing it
but this should be fixed anyway to avoid future intermittent failures.
By replacing the custom TestSuite with junit 4 @BeforeClass and
@AfterClass annotations running individual tests by themselves now works
correctly.
Since FetchHTTPTest now just contains the utility code for the test
servers we rename it to FetchHTTPTestServers. FetchHTTPTests (which
contains the actual tests) can now follow the standard naming
scheme as FetchHTTPTest.
Only treat icons, stylesheets and (tentatively) resource preloads as
embedded resources. Treat most other link types as navigation links.
Previously we were treating all link tags as embedded resources
including links like 'next', 'prev', 'canonical', 'author' which could
pull in resources that should normally be considered out of scope.
For example crawling a page containing an author link lke:
<link href="http://twitter.com/example" rel="author">
Would end up transitively pulling 200+ MB of Twitter profile pages in
multiple languages into a crawl for which twitter.com is not even
supposed to be in scope at all.
Fixes#263
- do not send the scheme/host/port part of the request
even when using a proxy, if the scheme is https
- in case of a https request send over a proxy, do not
wrap the first input/output streams (which only contain
the data for the `CONNECT` request), but the ones after
them, which contain the actual data
Fixes#191
If a null character appears in the Content-Length header Firefox and
Chrome seem to ignore the rest of the value so let's do the same.
Let's also handle the exception when parsing the content-length fails.
Fixes#449
dnsjava will create its global selector thread on first DNS lookup.
Since the first lookup occurs on a toe thread then this will cause the
selector thead to join the job's toe thread group. This is a problem
because when the job is terminated ToePool sends an interrupt to all
threads in the thread group which the dnsjava selector thread is
not expected and never clears. The interrupted state then causes
select() to return immediately instead of sleeping so it consumes
100% CPU.
So workaround this by doing a dummy lookup when FetchDNS is loaded,
this ensures the first lookup happens on the web server thread that
handles the job build action instead of a toe thread.
Fixes: 045b2516da ("Update to latest version of dnsjava")
Since the cache is global we only need to configure it once, not every
time we start a job. By moving it we keep the code that interfaces with
dnsjava centralized in FetchDNS.
Looks like dnsjava no longer uses a cleaner thread so remove the comment
referring to it.
Data URIs can be very large. ExtractorHTML mostly works with off-heap
CharSequences so by delaying the conversion of outlinks to strings
until after filtering out data URIs we can potentially avoid some
very large String allocations.
JavaDoc comments need to be directly above a class, method or field
declaration to be used by IDEs and generated documentation. We had some
doc comments that were attached to instance initialization blocks and
thus were being ignored. This invalid doc comment positioning was
presumably an accidental consequence of the conversion of fields to
KeyedProperties.
This change moves most of the dangling doc comments to setter methods
where it can be seen by tools. There were a couple of dangling doc
comments above package statements. These are moved above the class
declaration or removed entirely when empty.
The vast majority of protocols we use will have a server IP address,
so rather than having a separate one for each protocol let's just use
a single common one.
Andy Jackson