summaryrefslogtreecommitdiffstats
path: root/mimelib/body.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'mimelib/body.cpp')
-rw-r--r--mimelib/body.cpp715
1 files changed, 715 insertions, 0 deletions
diff --git a/mimelib/body.cpp b/mimelib/body.cpp
new file mode 100644
index 000000000..f5a56772f
--- /dev/null
+++ b/mimelib/body.cpp
@@ -0,0 +1,715 @@
+//=============================================================================
+// File: body.cpp
+// Contents: Definitions for DwBody
+// Maintainer: Doug Sauder <dwsauder@fwb.gulf.net>
+// WWW: http://www.fwb.gulf.net/~dwsauder/mimepp.html
+//
+// Copyright (c) 1996, 1997 Douglas W. Sauder
+// All rights reserved.
+//
+// IN NO EVENT SHALL DOUGLAS W. SAUDER BE LIABLE TO ANY PARTY FOR DIRECT,
+// INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
+// THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF DOUGLAS W. SAUDER
+// HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// DOUGLAS W. SAUDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
+// NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
+// BASIS, AND DOUGLAS W. SAUDER HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
+// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+//
+//=============================================================================
+
+#define DW_IMPLEMENTATION
+
+#include <mimelib/config.h>
+#include <mimelib/debug.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <iostream>
+#include <mimelib/string.h>
+#include <mimelib/headers.h>
+#include <mimelib/bodypart.h>
+#include <mimelib/body.h>
+#include <mimelib/message.h>
+#include <mimelib/mediatyp.h>
+#include <mimelib/enum.h>
+
+enum {
+ kParseSuccess,
+ kParseFail
+};
+
+
+struct DwBodyPartStr {
+ DwBodyPartStr(const DwString& aStr) : mString(aStr), mNext(0) {}
+ DwString mString;
+ DwBodyPartStr* mNext;
+};
+
+
+class DwBodyParser {
+ friend class DwBody;
+public:
+ ~DwBodyParser();
+private:
+ DwBodyParser(const DwString& aStr, const DwString& aBoundaryStr);
+ const DwString& Preamble() const { return mPreamble; }
+ const DwString& Epilogue() const { return mEpilogue; }
+ DwBodyPartStr* FirstBodyPart() const { return mFirstBodyPartStr; }
+ int Parse();
+ int FindBoundary(size_t aStartPos, size_t* aBoundaryStart,
+ size_t* aBoundaryEnd, size_t* isFinal) const;
+ void AddPart(size_t start, size_t len);
+ void DeleteParts();
+ const DwString mString;
+ const DwString mBoundary;
+ DwString mPreamble;
+ DwBodyPartStr* mFirstBodyPartStr;
+ DwString mEpilogue;
+};
+
+
+DwBodyParser::DwBodyParser(const DwString& aStr, const DwString& aBoundary)
+ : mString(aStr), mBoundary(aBoundary)
+{
+ mFirstBodyPartStr = 0;
+ Parse();
+}
+
+
+DwBodyParser::~DwBodyParser()
+{
+ DeleteParts();
+}
+
+
+int DwBodyParser::Parse()
+{
+ DeleteParts();
+ // Find the preamble
+ size_t pos = 0;
+ size_t boundaryStart, boundaryEnd, isFinal;
+ int result;
+ result = FindBoundary(pos, &boundaryStart, &boundaryEnd, &isFinal);
+ if (result == kParseFail) {
+ mPreamble = mEpilogue = "";
+ mFirstBodyPartStr = 0;
+ return kParseFail;
+ }
+ int start = pos;
+ int len = boundaryStart - pos;
+ mPreamble = mString.substr(start, len);
+ if ( boundaryStart < mString.size() && mString[boundaryStart] != '-' )
+ mPreamble += DW_EOL; // contrary to normal behaviour of
+ // DwBody::Parse(), we _do_ want a newline
+ // before the first boundary here. This is
+ // necessary since FindBoundary() can't
+ // make up it's mind on where the boundary
+ // starts - on the leading \n or the first
+ // '-'..
+
+ // Find the body parts
+ pos = boundaryEnd;
+ while (1) {
+ result = FindBoundary(pos, &boundaryStart, &boundaryEnd, &isFinal);
+ // NOTE: For enhanced fault tolerance we *accept* a missing last
+ // boundary.
+ // If no last boundary is found (but at leat a first one was
+ // there) we just assume the end of the text ebing the end
+ // of the last part.
+ // By doing so we can safely parse some buggy MS Outlook
+ // clients' messages. (khz, 12.06.2002)
+ start = pos;
+
+ if (result == kParseFail) {
+ isFinal = true;
+ len = mString.length() - pos;
+ } else {
+ len = boundaryStart - pos;
+ }
+
+ AddPart(start, len);
+
+ if (result == kParseFail) {
+ pos = mString.length();
+ } else {
+ pos = boundaryEnd;
+ }
+
+ if (isFinal) {
+ break;
+ }
+ }
+
+ // Find the epilogue
+ start = pos;
+ len = mString.length() - pos;
+ if( len )
+ mEpilogue = mString.substr(start, len);
+
+ return kParseSuccess;
+}
+
+// checks whether [cur,end[ matches -*[\r\t ]*(\n|$)
+static bool isOnlyWhiteSpaceOrDashesUntilEndOfLine( const char * cur, const char * end ) {
+ bool dashesStillAllowed = true;
+
+ while ( cur < end )
+ switch( *cur ) {
+ case ' ':
+ case '\t':
+ case '\r':
+ dashesStillAllowed = false;
+ ++cur;
+ continue;
+ case '\n':
+ return true;
+ case '-':
+ if ( !dashesStillAllowed )
+ return false;
+ ++cur;
+ continue;
+ default:
+ return false;
+ }
+ // end of buffer is ok, too:
+ return true;
+}
+
+int DwBodyParser::FindBoundary(size_t aStartPos, size_t* aBoundaryStart,
+ size_t* aBoundaryEnd, size_t* aIsFinal) const
+{
+ // Assume the starting position is the beginning of a line
+ const char* buf = mString.data();
+ size_t pos = aStartPos;
+ size_t endPos = mString.length();
+ size_t blen = mBoundary.length();
+ // Search for the first boundary.
+ // The leading CR LF ('\n') is part of the boundary, but if there is
+ // no preamble, there may be no leading CR LF ('\n').
+ // The case of no leading CR LF ('\n') is a special case that will occur
+ // only when '-' is the first character of the body.
+ if (buf[pos] == '-'
+ && pos+blen+1 < endPos
+ && buf[pos+1] == '-'
+ && strncmp(&buf[pos+2], mBoundary.data(), blen) == 0
+ && isOnlyWhiteSpaceOrDashesUntilEndOfLine( buf + pos + blen + 2, buf + endPos ) ) {
+
+ *aBoundaryStart = pos;
+ pos += blen + 2;
+ // Check for final boundary
+ if (pos+1 < endPos
+ && buf[pos] == '-'
+ && buf[pos+1] == '-') {
+
+ pos += 2;
+ *aIsFinal = 1;
+ }
+ else {
+ *aIsFinal = 0;
+ }
+ // Advance position past end of line
+ while (pos < endPos) {
+ if (buf[pos] == '\n') {
+ ++pos;
+ break;
+ }
+ ++pos;
+ }
+ *aBoundaryEnd = pos;
+ return kParseSuccess;
+ }
+ int isFound = 0;
+ while (pos+blen+2 < endPos) {
+ // Case of leading LF
+ if (buf[pos] == '\n'
+ && buf[pos+1] == '-'
+ && buf[pos+2] == '-'
+ && strncmp(&buf[pos+3], mBoundary.data(), blen) == 0
+ && isOnlyWhiteSpaceOrDashesUntilEndOfLine( buf + pos + blen + 3, buf + endPos ) ) {
+
+ *aBoundaryStart = pos;
+ pos += blen + 3;
+ isFound = 1;
+ }
+ // Case of leading CR LF
+ else if (buf[pos] == '\r'
+ && buf[pos+1] == '\n'
+ && buf[pos+2] == '-'
+ && pos+blen+3 < endPos
+ && buf[pos+3] == '-'
+ && strncmp(&buf[pos+4], mBoundary.data(), blen) == 0
+ && isOnlyWhiteSpaceOrDashesUntilEndOfLine( buf + pos + blen + 4, buf + endPos ) ) {
+
+ *aBoundaryStart = pos;
+ pos += blen + 4;
+ isFound = 1;
+ }
+ if (isFound) {
+ // Check for final boundary
+ if (pos < endPos
+ && buf[pos] == '-') {
+
+ // NOTE: Since we must be fault tolerant for being able to
+ // understand messaged that were damaged during
+ // transportation we now accept final boundaries
+ // ending with "-" instead of "--".
+ // (khz, 12.06.2002)
+ pos += 1;
+ *aIsFinal = 1;
+
+ // if there *is* the 2nd '-' we of course process it
+ if (pos+1 < endPos
+ && buf[pos+1] == '-') {
+ pos += 1;
+ }
+ }
+ else {
+ *aIsFinal = 0;
+ }
+ // Advance position past end of line
+ while (pos < endPos) {
+ if (buf[pos] == '\n') {
+ ++pos;
+ break;
+ }
+ ++pos;
+ }
+ *aBoundaryEnd = pos;
+ return kParseSuccess;
+ }
+ ++pos;
+ }
+ // Exceptional case: no boundary found
+ *aBoundaryStart = *aBoundaryEnd = mString.length();
+ *aIsFinal = 1;
+ return kParseFail;
+}
+
+
+void DwBodyParser::AddPart(size_t start, size_t len)
+{
+ DwBodyPartStr* toAdd = new DwBodyPartStr(mString.substr(start, len));
+ if (toAdd != 0) {
+ DwBodyPartStr* curr = mFirstBodyPartStr;
+ if (curr == 0) {
+ mFirstBodyPartStr = toAdd;
+ return;
+ }
+ while (curr->mNext != 0) {
+ curr = curr->mNext;
+ }
+ curr->mNext = toAdd;
+ }
+}
+
+
+void DwBodyParser::DeleteParts()
+{
+ DwBodyPartStr* curr = mFirstBodyPartStr;
+ while (curr) {
+ DwBodyPartStr* next = curr->mNext;
+ delete curr;
+ curr = next;
+ }
+ mFirstBodyPartStr = 0;
+}
+
+
+//==========================================================================
+
+
+const char* const DwBody::sClassName = "DwBody";
+
+
+DwBody* (*DwBody::sNewBody)(const DwString&, DwMessageComponent*) = 0;
+
+
+DwBody* DwBody::NewBody(const DwString& aStr, DwMessageComponent* aParent)
+{
+ if (sNewBody) {
+ DwBody* newBody = sNewBody(aStr, aParent);
+ //if( newBody )
+ // newBody->mFirstBodyPart = 0;
+ return newBody;
+ }
+ else {
+ return new DwBody(aStr, aParent);
+ }
+}
+
+
+DwBody::DwBody()
+{
+ mFirstBodyPart = 0;
+ mMessage = 0;
+ mClassId = kCidBody;
+ mClassName = sClassName;
+}
+
+
+DwBody::DwBody(const DwBody& aBody)
+ : DwMessageComponent(aBody),
+ mBoundaryStr(aBody.mBoundaryStr),
+ mPreamble(aBody.mPreamble),
+ mEpilogue(aBody.mEpilogue)
+{
+ mFirstBodyPart = 0;
+ const DwBodyPart* firstPart = aBody.mFirstBodyPart;
+ if (firstPart) {
+ CopyBodyParts(firstPart);
+ }
+ mMessage = 0;
+ const DwMessage* message = aBody.mMessage;
+ if (message) {
+ DwMessage* msg = (DwMessage*) message->Clone();
+ _SetMessage(msg);
+ }
+ mClassId = kCidBody;
+ mClassName = sClassName;
+}
+
+
+DwBody::DwBody(const DwString& aStr, DwMessageComponent* aParent)
+ : DwMessageComponent(aStr, aParent)
+{
+ mFirstBodyPart = 0;
+ mMessage = 0;
+ mClassId = kCidBody;
+ mClassName = sClassName;
+}
+
+
+DwBody::~DwBody()
+{
+ if (mFirstBodyPart) {
+ DeleteBodyParts();
+ }
+ if (mMessage) {
+ delete mMessage;
+ }
+}
+
+
+const DwBody& DwBody::operator = (const DwBody& aBody)
+{
+ if (this == &aBody) return *this;
+ mBoundaryStr = aBody.mBoundaryStr;
+ mPreamble = aBody.mPreamble;
+ mEpilogue = aBody.mEpilogue;
+ if (mFirstBodyPart) {
+ DeleteBodyParts();
+ }
+ const DwBodyPart* firstPart = aBody.FirstBodyPart();
+ if (firstPart) {
+ CopyBodyParts(firstPart);
+ }
+ if (mMessage) {
+ delete mMessage;
+ }
+ const DwMessage* message = aBody.Message();
+ if (message) {
+ DwMessage* msg = (DwMessage*) message->Clone();
+ _SetMessage(msg);
+ }
+ if (mParent) {
+ mParent->SetModified();
+ }
+ return *this;
+}
+
+
+void DwBody::Parse()
+{
+ mIsModified = 0;
+ // Only types "multipart" and "message" need to be parsed, and
+ // we cannot determine the type if there is no header.
+ if (!mParent) {
+ return;
+ }
+ // Get the content type from the headers
+ DwEntity* entity = (DwEntity*) mParent;
+ if (entity->Headers().HasContentType()) {
+ const DwMediaType& contentType = entity->Headers().ContentType();
+ int type = contentType.Type();
+ int subtype = contentType.Subtype();
+ if (type == DwMime::kTypeMultipart) {
+ mBoundaryStr = contentType.Boundary();
+ // Now parse body into body parts
+ DwBodyParser parser(mString, mBoundaryStr);
+ mPreamble = parser.Preamble();
+ mEpilogue = parser.Epilogue();
+ DwBodyPartStr* partStr = parser.FirstBodyPart();
+ while (partStr) {
+ DwBodyPart* part =
+ DwBodyPart::NewBodyPart(partStr->mString, this);
+ part->Parse();
+ _AddBodyPart(part);
+ partStr = partStr->mNext;
+ }
+ }
+ else if (type == DwMime::kTypeMessage &&
+ subtype == DwMime::kSubtypeRfc822) {
+ if (mMessage)
+ mMessage->FromString(mString);
+ else
+ mMessage = DwMessage::NewMessage(mString, this);
+ mMessage->Parse();
+ }
+ }
+}
+
+
+void DwBody::Assemble()
+{
+ if (!mIsModified) return;
+ if (!mFirstBodyPart && !mMessage) return;
+ if (!mParent) return;
+
+ DwEntity* entity = (DwEntity*) mParent;
+ /*
+ DwString partStr;
+ */
+ const DwMediaType& contentType = entity->Headers().ContentType();
+ int type = contentType.Type();
+ int subtype = contentType.Subtype();
+ if (type == DwMime::kTypeMultipart) {
+ /*
+ int len;
+ */
+ mBoundaryStr = contentType.Boundary();
+ mString = "";
+ mString += mPreamble;
+ DwBodyPart* part = mFirstBodyPart;
+ while (part) {
+ part->Assemble();
+ /*
+ partStr = part->AsString();
+ len = mString.length();
+ if( ! ( ( (1 < len)
+ && ('\n' == mString.at(len-1) )
+ && ('\n' == mString.at(len-2) ) )
+ || ( (2 < len)
+ && ('\n' == mString.at(len-1) )
+ && ('\r' == mString.at(len-2) )
+ && ('\n' == mString.at(len-3) ) ) ) )
+ */
+ if ( part != mFirstBodyPart )
+ mString += DW_EOL;
+ mString += "--";
+ mString += mBoundaryStr;
+ /*
+ len = partStr.length();
+ if( ! ( (0 < len)
+ && ( ('\n' == partStr.at(0) )
+ || ('\r' == partStr.at(0) ) ) ) )
+ */
+ mString += DW_EOL;
+ /*
+ mString += partStr;
+ */
+ mString += part->AsString();
+ part = part->Next();
+ }
+ /*
+ if( ! ( ( (1 < len)
+ && ('\n' == mString.at(len-1) )
+ && ('\n' == mString.at(len-2) ) )
+ || ( (2 < len)
+ && ('\n' == mString.at(len-1) )
+ && ('\r' == mString.at(len-2) )
+ && ('\n' == mString.at(len-3) ) ) ) )
+ */
+ mString += DW_EOL;
+ mString += "--";
+ mString += mBoundaryStr;
+ mString += "--";
+ mString += DW_EOL;
+ mString += mEpilogue;
+ mIsModified = 0;
+ }
+ else if (type == DwMime::kTypeMessage &&
+ subtype == DwMime::kSubtypeRfc822 &&
+ mMessage) {
+ mMessage->Assemble();
+ mString = mMessage->AsString();
+ }
+ else {
+ // Empty block
+ }
+}
+
+
+DwMessageComponent* DwBody::Clone() const
+{
+ return new DwBody(*this);
+}
+
+
+DwBodyPart* DwBody::FirstBodyPart() const
+{
+ return mFirstBodyPart;
+}
+
+
+void DwBody::AddBodyPart(DwBodyPart* aPart)
+{
+ _AddBodyPart(aPart);
+ SetModified();
+}
+
+void DwBody::RemoveBodyPart(DwBodyPart* aPart)
+{
+ _RemoveBodyPart(aPart);
+ SetModified();
+}
+
+
+DwMessage* DwBody::Message() const
+{
+ return mMessage;
+}
+
+
+void DwBody::SetMessage(DwMessage* aMessage)
+{
+ _SetMessage(aMessage);
+ SetModified();
+}
+
+
+void DwBody::_AddBodyPart(DwBodyPart* aPart)
+{
+ aPart->SetParent(this);
+ if (!mFirstBodyPart) {
+ mFirstBodyPart = aPart;
+ return;
+ }
+ DwBodyPart* part = mFirstBodyPart;
+ while (part->Next()) {
+ part = part->Next();
+ }
+ part->SetNext(aPart);
+}
+
+void DwBody::_RemoveBodyPart(DwBodyPart* aPart)
+{
+ if ( aPart->Parent() != this )
+ return; // caller error
+ if ( !mFirstBodyPart )
+ return; // impossible
+ if ( mFirstBodyPart == aPart ) {
+ mFirstBodyPart = mFirstBodyPart->Next();
+ return;
+ }
+ DwBodyPart* part = mFirstBodyPart;
+ while (part->Next()) {
+ if ( part->Next() == aPart ) {
+ part->SetNext(aPart->Next());
+ break;
+ }
+ part = part->Next();
+ }
+}
+
+
+void DwBody::_SetMessage(DwMessage* aMessage)
+{
+ aMessage->SetParent(this);
+ if (mMessage && mMessage != aMessage) {
+ delete mMessage;
+ }
+ mMessage = aMessage;
+}
+
+
+void DwBody::DeleteBodyParts()
+{
+ DwBodyPart* part = mFirstBodyPart;
+ while (part) {
+ DwBodyPart* nextPart = part->Next();
+ delete part;
+ part = nextPart;
+ }
+ mFirstBodyPart = 0;
+}
+
+
+void DwBody::CopyBodyParts(const DwBodyPart* aFirst)
+{
+ const DwBodyPart* part = aFirst;
+ while (part) {
+ DwBodyPart* newPart = (DwBodyPart*) part->Clone();
+ AddBodyPart(newPart);
+ part = part->Next();
+ }
+}
+
+
+#if defined(DW_DEBUG_VERSION)
+void DwBody::PrintDebugInfo(std::ostream& aStrm, int /*aDepth*/) const
+{
+ aStrm <<
+ "------------------ Debug info for DwBody class -----------------\n";
+ _PrintDebugInfo(aStrm);
+}
+#else
+void DwBody::PrintDebugInfo(std::ostream&, int) const {}
+#endif // defined(DW_DEBUG_VERSION)
+
+
+#if defined(DW_DEBUG_VERSION)
+void DwBody::_PrintDebugInfo(std::ostream& aStrm) const
+{
+ DwMessageComponent::_PrintDebugInfo(aStrm);
+ aStrm << "Boundary: " << mBoundaryStr << '\n';
+ aStrm << "Preamble: " << mPreamble << '\n';
+ aStrm << "Epilogue: " << mEpilogue << '\n';
+ aStrm << "Body Parts: ";
+ int count = 0;
+ DwBodyPart* bodyPart = mFirstBodyPart;
+ if (bodyPart) {
+ while (bodyPart) {
+ if (count > 0) aStrm << ' ';
+ aStrm << bodyPart->ObjectId();
+ bodyPart = (DwBodyPart*) bodyPart->Next();
+ ++count;
+ }
+ aStrm << '\n';
+ }
+ else {
+ aStrm << "(none)\n";
+ }
+ aStrm << "Message: ";
+ if (mMessage) {
+ aStrm << mMessage->ObjectId() << '\n';
+ }
+ else {
+ aStrm << "(none)\n";
+ }
+}
+#else
+void DwBody::_PrintDebugInfo(std::ostream& ) const {}
+#endif // defined(DW_DEBUG_VERSION)
+
+
+void DwBody::CheckInvariants() const
+{
+#if defined(DW_DEBUG_VERSION)
+ DwMessageComponent::CheckInvariants();
+ mBoundaryStr.CheckInvariants();
+ mPreamble.CheckInvariants();
+ mEpilogue.CheckInvariants();
+ DwBodyPart* bodyPart = mFirstBodyPart;
+ while (bodyPart) {
+ bodyPart->CheckInvariants();
+ bodyPart = (DwBodyPart*) bodyPart->Next();
+ }
+ if (mMessage) {
+ mMessage->CheckInvariants();
+ }
+#endif // defined(DW_DEBUG_VERSION)
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-30 12:11:33 +0000