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-rw-r--r--methods/server.cc161
1 files changed, 129 insertions, 32 deletions
diff --git a/methods/server.cc b/methods/server.cc
index 5a13f18a7..f61a6fedb 100644
--- a/methods/server.cc
+++ b/methods/server.cc
@@ -44,7 +44,8 @@ time_t ServerMethod::FailTime = 0;
// ---------------------------------------------------------------------
/* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
parse error occurred */
-ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
+ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File,
+ const std::string &Uri)
{
State = Header;
@@ -53,7 +54,8 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
Major = 0;
Minor = 0;
Result = 0;
- Size = 0;
+ TotalFileSize = 0;
+ JunkSize = 0;
StartPos = 0;
Encoding = Closes;
HaveContent = false;
@@ -66,7 +68,7 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
continue;
if (Owner->Debug == true)
- clog << Data;
+ clog << "Answer for: " << Uri << endl << Data;
for (string::const_iterator I = Data.begin(); I < Data.end(); ++I)
{
@@ -127,7 +129,7 @@ bool ServerState::HeaderLine(string Line)
if (elements == 3)
{
Code[0] = '\0';
- if (Owner->Debug == true)
+ if (Owner != NULL && Owner->Debug == true)
clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl;
}
else if (elements != 4)
@@ -162,15 +164,22 @@ bool ServerState::HeaderLine(string Line)
Encoding = Stream;
HaveContent = true;
- // The length is already set from the Content-Range header
- if (StartPos != 0)
- return true;
+ unsigned long long * DownloadSizePtr = &DownloadSize;
+ if (Result == 416)
+ DownloadSizePtr = &JunkSize;
- Size = strtoull(Val.c_str(), NULL, 10);
- if (Size >= std::numeric_limits<unsigned long long>::max())
+ *DownloadSizePtr = strtoull(Val.c_str(), NULL, 10);
+ if (*DownloadSizePtr >= std::numeric_limits<unsigned long long>::max())
return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header"));
- else if (Size == 0)
+ else if (*DownloadSizePtr == 0)
HaveContent = false;
+
+ // On partial content (206) the Content-Length less than the real
+ // size, so do not set it here but leave that to the Content-Range
+ // header instead
+ if(Result != 206 && TotalFileSize == 0)
+ TotalFileSize = DownloadSize;
+
return true;
}
@@ -185,15 +194,15 @@ bool ServerState::HeaderLine(string Line)
HaveContent = true;
// §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416
- if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&Size) == 1)
- {
- StartPos = 1; // ignore Content-Length, it would override Size
- HaveContent = false;
- }
- else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2)
+ if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&TotalFileSize) == 1)
+ ; // we got the expected filesize which is all we wanted
+ else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&TotalFileSize) != 2)
return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
- if ((unsigned long long)StartPos > Size)
+ if ((unsigned long long)StartPos > TotalFileSize)
return _error->Error(_("This HTTP server has broken range support"));
+
+ // figure out what we will download
+ DownloadSize = TotalFileSize - StartPos;
return true;
}
@@ -236,10 +245,21 @@ ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOu
Reset();
}
/*}}}*/
+bool ServerState::AddPartialFileToHashes(FileFd &File) /*{{{*/
+{
+ File.Truncate(StartPos);
+ return GetHashes()->AddFD(File, StartPos);
+}
+ /*}}}*/
bool ServerMethod::Configuration(string Message) /*{{{*/
{
- return pkgAcqMethod::Configuration(Message);
+ if (pkgAcqMethod::Configuration(Message) == false)
+ return false;
+
+ DropPrivsOrDie();
+
+ return true;
}
/*}}}*/
@@ -259,7 +279,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
Res.LastModified = Queue->LastModified;
return IMS_HIT;
}
-
+
/* Redirect
*
* Note that it is only OK for us to treat all redirection the same
@@ -304,12 +324,31 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
struct stat SBuf;
if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
{
- if ((unsigned long long)SBuf.st_size == Server->Size)
+ bool partialHit = false;
+ if (Queue->ExpectedHashes.usable() == true)
+ {
+ Hashes resultHashes(Queue->ExpectedHashes);
+ FileFd file(Queue->DestFile, FileFd::ReadOnly);
+ Server->TotalFileSize = file.FileSize();
+ Server->Date = file.ModificationTime();
+ resultHashes.AddFD(file);
+ HashStringList const hashList = resultHashes.GetHashStringList();
+ partialHit = (Queue->ExpectedHashes == hashList);
+ }
+ else if ((unsigned long long)SBuf.st_size == Server->TotalFileSize)
+ partialHit = true;
+ if (partialHit == true)
{
// the file is completely downloaded, but was not moved
- Server->StartPos = Server->Size;
- Server->Result = 200;
+ if (Server->HaveContent == true)
+ {
+ // Send to error page to dev/null
+ FileFd DevNull("/dev/null",FileFd::WriteExists);
+ Server->RunData(&DevNull);
+ }
Server->HaveContent = false;
+ Server->StartPos = Server->TotalFileSize;
+ Server->Result = 200;
}
else if (unlink(Queue->DestFile.c_str()) == 0)
{
@@ -323,10 +362,10 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
failure */
if (Server->Result < 200 || Server->Result >= 300)
{
- char err[255];
- snprintf(err,sizeof(err)-1,"HttpError%i",Server->Result);
+ std::string err;
+ strprintf(err, "HttpError%u", Server->Result);
SetFailReason(err);
- _error->Error("%u %s",Server->Result,Server->Code);
+ _error->Error("%u %s", Server->Result, Server->Code);
if (Server->HaveContent == true)
return ERROR_WITH_CONTENT_PAGE;
return ERROR_UNRECOVERABLE;
@@ -334,7 +373,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
// This is some sort of 2xx 'data follows' reply
Res.LastModified = Server->Date;
- Res.Size = Server->Size;
+ Res.Size = Server->TotalFileSize;
// Open the file
delete File;
@@ -347,7 +386,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
FailFd = File->Fd();
FailTime = Server->Date;
- if (Server->InitHashes(*File) == false)
+ if (Server->InitHashes(Queue->ExpectedHashes) == false || Server->AddPartialFileToHashes(*File) == false)
{
_error->Errno("read",_("Problem hashing file"));
return ERROR_NOT_FROM_SERVER;
@@ -392,9 +431,16 @@ bool ServerMethod::Fetch(FetchItem *)
for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth;
I = I->Next, Depth++)
{
- // If pipelining is disabled, we only queue 1 request
- if (Server->Pipeline == false && Depth >= 0)
- break;
+ if (Depth >= 0)
+ {
+ // If pipelining is disabled, we only queue 1 request
+ if (Server->Pipeline == false)
+ break;
+ // if we have no hashes, do at most one such request
+ // as we can't fixup pipeling misbehaviors otherwise
+ else if (I->ExpectedHashes.usable() == false)
+ break;
+ }
// Make sure we stick with the same server
if (Server->Comp(I->Uri) == false)
@@ -478,7 +524,7 @@ int ServerMethod::Loop()
Fetch(0);
// Fetch the next URL header data from the server.
- switch (Server->RunHeaders(File))
+ switch (Server->RunHeaders(File, Queue->Uri))
{
case ServerState::RUN_HEADERS_OK:
break;
@@ -524,6 +570,13 @@ int ServerMethod::Loop()
// Run the data
bool Result = true;
+
+ // ensure we don't fetch too much
+ // we could do "Server->MaximumSize = Queue->MaximumSize" here
+ // but that would break the clever pipeline messup detection
+ // so instead we use the size of the biggest item in the queue
+ Server->MaximumSize = FindMaximumObjectSizeInQueue();
+
if (Server->HaveContent)
Result = Server->RunData(File);
@@ -546,7 +599,38 @@ int ServerMethod::Loop()
// Send status to APT
if (Result == true)
{
- Res.TakeHashes(*Server->GetHashes());
+ Hashes * const resultHashes = Server->GetHashes();
+ HashStringList const hashList = resultHashes->GetHashStringList();
+ if (PipelineDepth != 0 && Queue->ExpectedHashes.usable() == true && Queue->ExpectedHashes != hashList)
+ {
+ // we did not get the expected hash… mhhh:
+ // could it be that server/proxy messed up pipelining?
+ FetchItem * BeforeI = Queue;
+ for (FetchItem *I = Queue->Next; I != 0 && I != QueueBack; I = I->Next)
+ {
+ if (I->ExpectedHashes.usable() == true && I->ExpectedHashes == hashList)
+ {
+ // yes, he did! Disable pipelining and rewrite queue
+ if (Server->Pipeline == true)
+ {
+ // FIXME: fake a warning message as we have no proper way of communicating here
+ std::string out;
+ strprintf(out, _("Automatically disabled %s due to incorrect response from server/proxy. (man 5 apt.conf)"), "Acquire::http::PipelineDepth");
+ std::cerr << "W: " << out << std::endl;
+ Server->Pipeline = false;
+ // we keep the PipelineDepth value so that the rest of the queue can be fixed up as well
+ }
+ Rename(Res.Filename, I->DestFile);
+ Res.Filename = I->DestFile;
+ BeforeI->Next = I->Next;
+ I->Next = Queue;
+ Queue = I;
+ break;
+ }
+ BeforeI = I;
+ }
+ }
+ Res.TakeHashes(*resultHashes);
URIDone(Res);
}
else
@@ -566,7 +650,10 @@ int ServerMethod::Loop()
QueueBack = Queue;
}
else
+ {
+ Server->Close();
Fail(true);
+ }
}
break;
}
@@ -661,3 +748,13 @@ int ServerMethod::Loop()
return 0;
}
/*}}}*/
+ /*{{{*/
+unsigned long long
+ServerMethod::FindMaximumObjectSizeInQueue() const
+{
+ unsigned long long MaxSizeInQueue = 0;
+ for (FetchItem *I = Queue; I != 0 && I != QueueBack; I = I->Next)
+ MaxSizeInQueue = std::max(MaxSizeInQueue, I->MaximumSize);
+ return MaxSizeInQueue;
+}
+ /*}}}*/
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-02 05:31:30 +0000