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Diffstat (limited to 'comm/mailnews/import/src/nsEmlxHelperUtils.mm')
| -rw-r--r-- | comm/mailnews/import/src/nsEmlxHelperUtils.mm | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/comm/mailnews/import/src/nsEmlxHelperUtils.mm b/comm/mailnews/import/src/nsEmlxHelperUtils.mm new file mode 100644 index 0000000000..a0c5aaaee2 --- /dev/null +++ b/comm/mailnews/import/src/nsEmlxHelperUtils.mm @@ -0,0 +1,230 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "nsEmlxHelperUtils.h" +#include "nsIOutputStream.h" +#include "nsNetUtil.h" +#include "nsCOMPtr.h" +#include "nsObjCExceptions.h" +#include "nsMsgMessageFlags.h" +#include "nsMsgLocalFolderHdrs.h" +#include "msgCore.h" +#include "nsTArray.h" +#include "nsAppleMailImport.h" +#include "prprf.h" +#include "nsIFile.h" + +#import <Cocoa/Cocoa.h> + +nsresult nsEmlxHelperUtils::ConvertToMozillaStatusFlags(const char* aXMLBufferStart, + const char* aXMLBufferEnd, + uint32_t* aMozillaStatusFlags) { + // create a NSData wrapper around the buffer, so we can use the Cocoa call below + NSData* metadata = [[[NSData alloc] initWithBytesNoCopy:(void*)aXMLBufferStart + length:(aXMLBufferEnd - aXMLBufferStart) + freeWhenDone:NO] autorelease]; + + // get the XML data as a dictionary + NSPropertyListFormat format; + id plist = [NSPropertyListSerialization propertyListWithData:metadata + options:NSPropertyListImmutable + format:&format + error:NULL]; + + if (!plist) return NS_ERROR_FAILURE; + + // find the <flags>...</flags> value and convert to int + const uint32_t emlxMessageFlags = [[(NSDictionary*)plist objectForKey:@"flags"] intValue]; + + if (emlxMessageFlags == 0) return NS_ERROR_FAILURE; + + if (emlxMessageFlags & nsEmlxHelperUtils::kRead) *aMozillaStatusFlags |= nsMsgMessageFlags::Read; + if (emlxMessageFlags & nsEmlxHelperUtils::kForwarded) + *aMozillaStatusFlags |= nsMsgMessageFlags::Forwarded; + if (emlxMessageFlags & nsEmlxHelperUtils::kAnswered) + *aMozillaStatusFlags |= nsMsgMessageFlags::Replied; + if (emlxMessageFlags & nsEmlxHelperUtils::kFlagged) + *aMozillaStatusFlags |= nsMsgMessageFlags::Marked; + + return NS_OK; +} + +nsresult nsEmlxHelperUtils::ConvertToMboxRD(const char* aMessageBufferStart, + const char* aMessageBufferEnd, nsCString& aOutBuffer) { + nsTArray<const char*> foundFromLines; + + const char* cur = aMessageBufferStart; + while (cur < aMessageBufferEnd) { + const char* foundFromStr = strnstr(cur, "From ", aMessageBufferEnd - cur); + + if (foundFromStr) { + // skip all prepending '>' chars + const char* fromLineStart = foundFromStr; + while (fromLineStart-- >= aMessageBufferStart) { + if (*fromLineStart == '\n' || fromLineStart == aMessageBufferStart) { + if (fromLineStart > aMessageBufferStart) fromLineStart++; + foundFromLines.AppendElement(fromLineStart); + break; + } else if (*fromLineStart != '>') + break; + } + + // advance past the last found From string. + cur = foundFromStr + 5; + + // look for more From lines. + continue; + } + + break; + } + + // go through foundFromLines + if (foundFromLines.Length()) { + const char* chunkStart = aMessageBufferStart; + for (unsigned i = 0; i < foundFromLines.Length(); ++i) { + aOutBuffer.Append(chunkStart, (foundFromLines[i] - chunkStart)); + aOutBuffer.Append(">"_ns); + + chunkStart = foundFromLines[i]; + } + aOutBuffer.Append(chunkStart, (aMessageBufferEnd - chunkStart)); + } + + return NS_OK; +} + +nsresult nsEmlxHelperUtils::AddEmlxMessageToStream(nsIFile* aMessage, nsIOutputStream* aOut) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN; + + // needed to be sure autoreleased objects are released too, which they might not + // in a C++ environment where the main event loop has no autorelease pool (e.g on a XPCOM thread) + NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; + + nsresult rv = NS_ERROR_FAILURE; + + nsAutoCString path; + aMessage->GetNativePath(path); + + NSData* data = [NSData dataWithContentsOfFile:[NSString stringWithUTF8String:path.get()]]; + if (!data) { + [pool release]; + return NS_ERROR_FAILURE; + } + + char* startOfMessageData = NULL; + uint32_t actualBytesWritten = 0; + + // The anatomy of an EMLX file: + // + // ------------------------------- + // < A number describing how many bytes ahead there is message data > + // < Message data > + // < XML metadata for this message > + // ------------------------------- + + // read the first line of the emlx file, which is a number of how many bytes ahead the actual + // message data is. + uint64_t numberOfBytesToRead = strtol((char*)[data bytes], &startOfMessageData, 10); + if (numberOfBytesToRead <= 0 || !startOfMessageData) { + [pool release]; + return NS_ERROR_FAILURE; + } + + // skip whitespace + while (*startOfMessageData == ' ' || *startOfMessageData == '\n' || *startOfMessageData == '\r' || + *startOfMessageData == '\t') + ++startOfMessageData; + + constexpr auto kBogusFromLine = "From \n"_ns; + constexpr auto kEndOfMessage = "\n\n"_ns; + + // write the bogus "From " line which is a magic separator in the mbox format + rv = aOut->Write(kBogusFromLine.get(), kBogusFromLine.Length(), &actualBytesWritten); + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + // now read the XML metadata, so we can extract info like which flags (read? replied? flagged? + // etc) this message has. + const char* startOfXMLMetadata = startOfMessageData + numberOfBytesToRead; + const char* endOfXMLMetadata = (char*)[data bytes] + [data length]; + + uint32_t x_mozilla_flags = 0; + ConvertToMozillaStatusFlags(startOfXMLMetadata, endOfXMLMetadata, &x_mozilla_flags); + + // write the X-Mozilla-Status header according to which flags we've gathered above. + uint32_t dummyRv; + nsAutoCString buf(PR_smprintf(X_MOZILLA_STATUS_FORMAT MSG_LINEBREAK, x_mozilla_flags)); + NS_ASSERTION(!buf.IsEmpty(), "printf error with X-Mozilla-Status header"); + if (buf.IsEmpty()) { + [pool release]; + return rv; + } + + rv = aOut->Write(buf.get(), buf.Length(), &dummyRv); + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + // write out X-Mozilla-Keywords header as well to reserve some space for it + // in the mbox file. + rv = aOut->Write(X_MOZILLA_KEYWORDS, X_MOZILLA_KEYWORDS_LEN, &dummyRv); + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + // write out empty X-Mozilla_status2 header + buf.Adopt(PR_smprintf(X_MOZILLA_STATUS2_FORMAT MSG_LINEBREAK, 0)); + NS_ASSERTION(!buf.IsEmpty(), "printf error with X-Mozilla-Status2 header"); + if (buf.IsEmpty()) { + [pool release]; + return NS_ERROR_OUT_OF_MEMORY; + } + + rv = aOut->Write(buf.get(), buf.Length(), &dummyRv); + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + // do any conversion needed for the mbox data to be valid mboxrd. + nsCString convertedData; + rv = ConvertToMboxRD(startOfMessageData, (startOfMessageData + numberOfBytesToRead), + convertedData); + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + // write the actual message data. + if (convertedData.IsEmpty()) + rv = aOut->Write(startOfMessageData, (uint32_t)numberOfBytesToRead, &actualBytesWritten); + else { + IMPORT_LOG1("Escaped From-lines in %s!", path.get()); + rv = aOut->Write(convertedData.get(), convertedData.Length(), &actualBytesWritten); + } + + if (NS_FAILED(rv)) { + [pool release]; + return rv; + } + + NS_ASSERTION(actualBytesWritten == + (convertedData.IsEmpty() ? numberOfBytesToRead : convertedData.Length()), + "Didn't write as many bytes as expected for .emlx file?"); + + // add newlines to denote the end of this message in the mbox + rv = aOut->Write(kEndOfMessage.get(), kEndOfMessage.Length(), &actualBytesWritten); + + [pool release]; + + return rv; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE); +} |