Mailman 3 December 2020 - Twisted

[Twisted-Python] Participating to GitHub Sponsors
by Adi Roiban Dec. 23, 2020

Dec. 23, 2020

Hi, Does anyone have anything against applying so that Twisted can be on the waitlist of the GitHub Sponsors ? https://github.com/sponsors/twisted/waitlist As far as I know, the money for the Twisted project is managed by the Software Freedom Conservancy organization and they are already approved hosts for GitHub Sponsors. At this point, we only need to press the green button. The bank account and other administrative issues are already sorted out. ------------ If there are no complaints , I plan to press the green button in 1 week. We will then have to see how to access those funds via Software Freedom Conservancy... but that is part 2. Cheers -- Adi Roiban

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Dec. 20, 2020

Dec. 20, 2020

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Re: [Twisted-Python] Current twisted dns client just doesn't work
by Barry Scott Dec. 17, 2020

Dec. 17, 2020

Answers to but your emails in line. I've added the twisted list back in so others can comment. On Wednesday, 9 December 2020 21:17:51 GMT spam tam wrote: > As additional information you can check how operation system works with dns. > You can run > > *sudo tcpdump -i lo -v port 53* > as UDP local sniffer. Agreed great tool to debug this stuff with. And use wireshark to decode the output. > And run > > *dig google.com <http://google.com>* > > And you will see that it makes A request. Not ANY That is the dig default to use A. Use this to do a any query. dig google.com any I checked the man page to see if anything extra can be printed but it looks like the default is to print everything dig knows how to print. The options only remove output it seems. > On Wed, Dec 9, 2020 at 11:42 PM spam tam <kuchaspama(a)gmail.com> wrote: > > > Yes. You are correct. My local dns just is not stable. But try this: > > > > python3.8 dns_lookup6.py amazon.in > > > > It provides response: > > > > --- dnsLookupDone ([<RR name=amazon.in type=HINFO class=IN ttl=3599s > > auth=False>], [], []) > > --- dnsLookupDone RR <RR name=amazon.in type=HINFO class=IN ttl=3599s > > auth=False> type 13 payload <HINFO cpu='RFC8482' os='' ttl=3599> > > > > There are not CNAME, A, AAAA or NS records. This means that current > > twisted.names.common.extractRecord will not provide IP. > > What do you think about this? May be we should replace dns ANY request > > with A and AAAA? Now that is interesting because dig returns 54 lines of output from: dig amazon.in any (I won't paste the 54 lines). I good question is why did twisted not see that huge set of records? I'd want to understand why twisted is only seeing the HINFO and not all the other records. Fixing that would, I'm guessing, fix a lot of things. I'm not sure when I can look at this. Do you want to look at the packets that twisted sends and receives and compared to dig? Barry > > > > On Wed, Dec 9, 2020 at 12:16 PM Barry Scott <barry.scott(a)forcepoint.com> > > wrote: > > > > > > On Tuesday, 8 December 2020 21:01:56 GMT spam tam wrote: > > > > I continue to investigate the issue. I try to call your script like > > this: > > > > > > > > python dns_lookup6.py www.washingtonexaminer.com > > > > > > > > And get response: > > > > dnsLookupFailed <twisted.python.failure.Failure > > > > twisted.names.error.DNSServerError: <Message id=55958 rCode=2 > > > > maxSize=0 flags=answer,recDes,recAv > > > > queries=[Query('www.washingtonexaminer.com', 255, 1)]>> > > > > result.value.__dict__ {} > > > > > > > > Is that ok? > > > > > > > The output I get is this: > > > > > > $ python3.8 dns_lookup6.py www.washingtonexaminer.com > > > Took: 0.029293 > > > --- dnsLookupDone ([<RR name=www.washingtonexaminer.com type=CNAME > > class=IN ttl=37s auth=False>], [], []) > > > --- dnsLookupDone RR <RR name=www.washingtonexaminer.com type=CNAME > > class=IN ttl=37s auth=False> type 5 payload <CNAME name= > > 4067e1ed38.10005.sucurifirewall.com ttl=37> > > > > > > And this is the output of dig: > > > > > > $ dig www.washingtonexaminer.com > > > > > > ; <<>> DiG 9.11.24-RedHat-9.11.24-2.fc32 <<>> www.washingtonexaminer.com > > > ;; global options: +cmd > > > ;; Got answer: > > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61831 > > > ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 > > > > > > ;; OPT PSEUDOSECTION: > > > ; EDNS: version: 0, flags:; udp: 4000 > > > ;; QUESTION SECTION: > > > ;www.washingtonexaminer.com. IN A > > > > > > ;; ANSWER SECTION: > > > www.washingtonexaminer.com. 599 IN CNAME > > 4067e1ed38.10005.sucurifirewall.com. > > > 4067e1ed38.10005.sucurifirewall.com. 7199 IN A 192.124.249.5 > > > > > > ;; Query time: 50 msec > > > ;; SERVER: 10.5.10.11#53(10.5.10.11) > > > ;; WHEN: Wed Dec 09 09:13:54 GMT 2020 > > > ;; MSG SIZE rcvd: 117 > > > > > > Barry > > > > > > > > > > > >

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Dec. 13, 2020

Dec. 13, 2020

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[Twisted-Python] Current twisted dns client just doesn't work
by spam tam Dec. 9, 2020

Dec. 9, 2020

Twisted provide ability to run dns client in the same thread as main twisted application. But it just doesn't work. I created pull request which fix the problem: https://github.com/twisted/twisted/pull/1488 I would like to know if twisted community knows about it. This client doesn't work for years. I think that we should fix the problem. Twisted dns client should work. What do you think? I think we should discuss the problem. DNS client protocol provide ANY, A, AAAA requests. Current dns ANY request is not enough. My code add A dns request after current ANY request. Is this enough fix or anybody think it's not enough or may be we should find another solution. I think twisted framework should work

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com Dec. 6, 2020

Dec. 6, 2020

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[Twisted-Python] Injecting 400 errors via HTTP Proxy
by Vlad Petric Dec. 5, 2020

Dec. 5, 2020

Hi Everyone, I'd like to randomly inject 400 errors via the HTTP Proxy. I'm testing the robustness of an application that performs a lot of HTTP GETs. I am using the basic http web proxy, and I need to modify it to randomly insert some errors. Should I be using my own class derived from ProxyRequest, and override process()? If that's the case, how would I be injecting 400s? Thank you so much! Vlad, a twisted n00b

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[Twisted-Python] More Conch Questions
by Robert DiFalco Dec. 1, 2020

Dec. 1, 2020

I'm continuing to wrestle with conch, this time around authentication and notifying deferred of auth failure. It seems like the SSH factory has a deferred to be notified of auth failures here: https://github.com/twisted/twisted/blob/trunk/src/twisted/conch/client/dire… Unfortunately, this deferred is cleared because prior to auth, it receives this on successful connect: https://github.com/twisted/twisted/blob/trunk/src/twisted/conch/client/dire… As you can see this clears the deferred so it is no longer available to get an errback. This also prevents the SSHClientTransport from getting a sendDisconnect. To try it change the user to something invalid here: https://gist.github.com/radifalco/5a5cca4bf8d49d5c61113e36f9be7553#file-sft… This will never get a callback to errback. I guess I would have expected this to get the error but it actually succeeds with None. As a result there is no deferred to get the auth failure and my app waits forever for a notification. There is one ting I *think* I know how to do, add a timeout with a callback later on the sftpClient deferred. But that seems lame. What I'd like to do is to get this ConchError as it has the actual reason for the connection failure. Thoughts? https://github.com/twisted/twisted/blob/trunk/src/twisted/conch/client/dire…

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