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2016-12-31separating state variables regarding server/requestDavid Kalnischkies
Having a Reset(bool) method to partially reset certain variables like the download size always were strange, so this commit splits the ServerState into an additional RequestState living on the stack for as long as we deal with this request causing an automatic "reset". There is much to do still to make this code look better, but this is a good first step which compiles cleanly and passes all tests, so keeping it as history might be beneficial and due to avoiding explicit memory allocations it ends up fixing a small memory leak in https, too. Closes: #440057
2016-08-16don't sent Range requests if we know its not acceptedDavid Kalnischkies
If the server told us in a previous request that it isn't supporting Ranges with bytes via an Accept-Ranges header missing bytes, we don't try to formulate requests using Ranges.
2016-08-16reorganize server-states resetting in http/httpsDavid Kalnischkies
We keep various information bits about the server around, some only effecting the currently handled file (like sizes) while others should be persistent (like pipeline detections). http used to reset all file-related manually, which is a bit silly if we already have a Reset() method – which does reset all through –, so extending it with a parameter for reuse and calling it from https too (as this was previously resetting by just creating a new state struct – it uses no value of the persistent state-keeping yet as it supports no pipelining). Gbp-Dch: Ignore
2016-08-11http: auto-configure for local Tor proxy if called as 'tor'David Kalnischkies
With apts http transport supporting socks5h proxies and all the work in terms of configuration of methods based on the name it is called with it becomes surprisingly easy to implement Tor support equally (and perhaps even a bit exceeding) what is available currently in apt-transport-tor. How this will turn out to be handled packaging wise we will see in https://lists.debian.org/deity/2016/08/msg00012.html , but until this is resolved we can add the needed support without actively enabling it for now, so that this can be tested better.
2016-08-10implement generic config fallback for methodsDavid Kalnischkies
The https method implemented for a long while now a hardcoded fallback to the same options in http, which, while it works, is rather inflexible if we want to allow the methods to use another name to change their behavior slightly, like apt-transport-tor does to https – most of the diff being s#https#tor#g which then fails to do the full circle fallthrough tor -> https -> http for https sources. With this config infrastructure this could be implemented now.
2016-08-10use the same redirection handling for http and httpsDavid Kalnischkies
cURL which backs our https implementation can handle redirects on its own, but by dealing with them on our own we gain finer control over which redirections will be performed (we don't like https → http) and by whom so that redirections to other hosts correctly spawn a new https method dealing with these instead of letting the current one deal with it.
2016-08-10detect redirection loops in acquire instead of workersDavid Kalnischkies
Having the detection handled in specific (http) workers means that a redirection loop over different hostnames isn't detected. Its also not a good idea have this implement in each method independently even if it would work
2016-07-05avoid 416 response teardown binding to null pointerDavid Kalnischkies
methods/http.cc:640:13: runtime error: reference binding to null pointer of type 'struct FileFd' This reference is never used in the cases it has a nullptr, so the practical difference is non-existent, but its a bug still. Reported-By: gcc -fsanitize=undefined
2016-05-28use std::locale::global instead of setlocaleDavid Kalnischkies
We use a wild mixture of C and C++ ways of generating output, so having a consistent world-view in both styles sounds like a good idea and should help in preventing regressions.
2016-01-12Only enable pipelining if server is HTTP/1.1Julian Andres Klode
Just enabling it for anyone breaks with HTTP/1.0 servers and proxies sometimes. Closes: #810796
2015-11-05allow acquire method specific options via Binary scopeDavid Kalnischkies
Allows users who know what they are getting themselves into with this trick to e.g. disable privilege dropping for e.g. file:// until they can fix up the permissions on those repositories. It helps also the test framework and people with a similar setup (= me) to run in less modified environments.
2015-09-14fix two memory leaks reported by gccDavid Kalnischkies
Reported-By: gcc -fsanitize=address -fno-sanitize=vptr Git-Dch: Ignore
2015-08-10add c++11 override marker to overridden methodsDavid Kalnischkies
C++11 adds the 'override' specifier to mark that a method is overriding a base class method and error out if not. We hide it in the APT_OVERRIDE macro to ensure that we keep compiling in pre-c++11 standards. Reported-By: clang-modernize -add-override -override-macros Git-Dch: Ignore
2015-05-22Merge branch 'debian/sid' into debian/experimentalMichael Vogt
Conflicts: apt-pkg/pkgcache.h debian/changelog methods/https.cc methods/server.cc test/integration/test-apt-download-progress
2015-05-22Rename "Size" in ServerState to TotalFileSizeMichael Vogt
The variable "Size" was misleading and caused bug #1445239. To avoid similar issues in the future, rename it to make the meaning more obvious. git-dch: ignore
2015-05-22Fix endless loop in apt-get update that can cause disk fillupMichael Vogt
The apt http code parses Content-Length and Content-Range. For both requests the variable "Size" is used and the semantic for this Size is the total file size. However Content-Length is not the entire file size for partital file requests. For servers that send the Content-Range header first and then the Content-Length header this can lead to globbing of Size so that its less than the real file size. This may lead to a subsequent passing of a negative number into the CircleBuf which leads to a endless loop that writes data. Thanks to Anton Blanchard for the analysis and initial patch. LP: #1445239
2015-04-19calculate hashes while downloading in httpsDavid Kalnischkies
We do this in HTTP already to give the CPU some exercise while the disk is heavily spinning (or flashing?) to store the data avoiding the need to reread the entire file again later on to calculate the hashes – which happens outside of the eyes of progress reporting, so you might ended up with a bunch of https workers 'stuck' at 100% while they were busy calculating hashes. This is a bummer for everyone using apt as a connection speedtest as the https method works slower now (not really, it just isn't reporting done too early anymore).
2015-04-19calculate only expected hashes in methodsDavid Kalnischkies
Methods get told which hashes are expected by the acquire system, which means we can use this list to restrict what we calculate in the methods as any extra we are calculating is wasted effort as we can't compare it with anything anyway. Adding support for a new hash algorithm is therefore 'free' now and if a algorithm is no longer provided in a repository for a file, we automatically stop calculating it. In practice this results in a speed-up in Debian as we don't have SHA512 here (so far), so we practically stop calculating it.
2015-04-19improve https method queue progress reportingDavid Kalnischkies
The worker expects that the methods tell him when they start or finish downloading a file. Various information pieces are passed along in this report including the (expected) filesize. https was using a "global" struct for reporting which made it 'reuse' incorrect values in some cases like a non-existent InRelease fallbacking to Release{,.gpg} resulting in a size-mismatch warning. Reducing the scope and redesigning the setting of the values we can fix this and related issues. Closes: 777565, 781509 Thanks: Robert Edmonds and Anders Kaseorg for initial patchs
2015-03-16derive more of https from http methodDavid Kalnischkies
Bug #778375 uncovered that https wasn't properly integrated in the class family tree of http as it was supposed to be leading to a NULL pointer dereference. Fixing this 'properly' was deemed to much diff for practically no gain that late in the release, so commit 0c2dc43d4fe1d026650b5e2920a021557f9534a6 just fixed the synptom, while this commit here is fixing the cause plus adding a test.
2014-12-22dispose http(s) 416 error page as non-contentDavid Kalnischkies
Real webservers (like apache) actually send an error page with a 416 response, but our client didn't expect it leaving the page on the socket to be parsed as response for the next request (http) or as file content (https), which isn't what we want at all… Symptom is a "Bad header line" as html usually doesn't parse that well to an http-header. This manifests itself e.g. if we have a complete file (or larger) in partial/ which isn't discarded by If-Range as the server doesn't support it (or it is just newer, think: mirror rotation). It is a sort-of regression of 78c72d0ce22e00b194251445aae306df357d5c1a, which removed the filesize - 1 trick, but this had its own problems… To properly test this our webserver gains the ability to reply with transfer-encoding: chunked as most real webservers will use it to send the dynamically generated error pages. (The tests and their binary helpers had to be slightly modified to apply, but the patch to fix the issue itself is unchanged.) Closes: 768797
2014-12-09dispose http(s) 416 error page as non-contentDavid Kalnischkies
Real webservers (like apache) actually send an error page with a 416 response, but our client didn't expect it leaving the page on the socket to be parsed as response for the next request (http) or as file content (https), which isn't what we want at all… Symptom is a "Bad header line" as html usually doesn't parse that well to an http-header. This manifests itself e.g. if we have a complete file (or larger) in partial/ which isn't discarded by If-Range as the server doesn't support it (or it is just newer, think: mirror rotation). It is a sort-of regression of 78c72d0ce22e00b194251445aae306df357d5c1a, which removed the filesize - 1 trick, but this had its own problems… To properly test this our webserver gains the ability to reply with transfer-encoding: chunked as most real webservers will use it to send the dynamically generated error pages. Closes: 768797
2014-10-08Fix http pipeline messup detectionMichael Vogt
The Maximum-Size protection breaks the http pipeline reorder code because it relies on that the object got fetched entirely so that it can compare the hash of the downloaded data. So instead of stopping when the Maximum-Size of the expected item is reached we only stop when the maximum size of the biggest item in the queue is reached. This way the pipeline reoder code keeps working.
2014-10-07make expected-size a maximum-size check as this is what we want at this pointMichael Vogt
2014-10-06make http size check workMichael Vogt
2014-09-23Merge branch 'debian/sid' into debian/experimentalMichael Vogt
Conflicts: apt-pkg/acquire-item.cc apt-pkg/acquire-item.h apt-pkg/cachefilter.h configure.ac debian/changelog
2014-09-05Improve Debug::Acquire::http debug outputMichael Vogt
Prefix all answers with the URL that the answer is for. This helps when debugging and pipeline is enabled.
2014-08-26Pass ExpectedSize to tthe backend methodMichael Vogt
This ensures that we can stop downloading if the server send too much data by accident (or by a malicious attempt)
2014-05-09reenable pipelining via hashsum reordering supportDavid Kalnischkies
Now that methods have the expected hashes available they can check if the response from the server is what they expected. Pipelining is one of those areas in which servers can mess up by not supporting it properly, which forced us to disable it for the time being. Now, we check if we got a response out of order, which we can not only use to disable pipelining automatically for the next requests, but we can fix it up just like the server responded in proper order for the current requests. To ensure that this little trick works pipelining is only attempt if we have hashsums for all the files in the chain which in theory reduces the use of pipelining usage even on the many servers which work properly, but in practice only the InRelease file (or similar such) will be requested without a hashsum – and as it is the only file requested in that stage it can't be pipelined even if we wanted to. Some minor annoyances remain: The display of the progress we have doesn't reflect this change, so it looks like the same package gets downloaded multiple times while others aren't at all. Further more, partial files are not supported in this recovery as the received data was appended to the wrong file, so the hashsum doesn't match. Both seem to be minor enough to reenable pipelining by default until further notice through to test if it really solves the problem. This therefore reverts commit 8221431757c775ee875a061b184b5f6f2330f928.
2014-03-13follow method attribute suggestions by gccDavid Kalnischkies
Git-Dch: Ignore Reported-By: gcc -Wsuggest-attribute={pure,const,noreturn}
2014-03-13cleanup headers and especially #includes everywhereDavid Kalnischkies
Beside being a bit cleaner it hopefully also resolves oddball problems I have with high levels of parallel jobs. Git-Dch: Ignore Reported-By: iwyu (include-what-you-use)
2014-03-13StartPos is always positive for http/httpsDavid Kalnischkies
server.cc: In member function ‘bool ServerState::HeaderLine(std::string)’: server.cc:198:72: warning: format ‘%llu’ expects argument of type ‘long long unsigned int*’, but argument 3 has type ‘long long int*’ [-Wformat=] else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2) Git-Dch: Ignore Reported-By: gcc -Wpedantic
2014-03-13warning: extra ‘;’ [-Wpedantic]David Kalnischkies
Git-Dch: Ignore Reported-By: gcc -Wpedantic
2014-01-16correct some style/performance/warnings from cppcheckDavid Kalnischkies
The most "visible" change is from utime to utimensat/futimens as the first one isn't part of POSIX anymore. Reported-By: cppcheck Git-Dch: Ignore
2013-10-01handle complete responses to https range requestsDavid Kalnischkies
Servers might respond with a complete file either because they don't support Ranges at all or the If-Range condition isn't statisfied, so we have to parse the headers curl gets ourself to seek or truncate the file we have so far. This also finially adds the testcase testing a bunch of partial situations for both, http and https - which is now all green. Closes: 617643, 667699 LP: 1157943
2013-10-01refactor http client implementationDavid Kalnischkies
No effective behavior change, just shuffling big junks of code between methods and classes to split them into those strongly related to our client implementation and those implementing HTTP. The idea is to get HTTPS to a point in which most of the implementation can be shared even though the client implementations itself is completely different. This isn't anywhere near yet though, but it should beenough to reuse at least a few lines from http in https now. Git-Dch: Ignore