diff --git a/lib/cpp/src/Thrift.h b/lib/cpp/src/Thrift.h
index 0b13bae..ad8d46c 100644
--- a/lib/cpp/src/Thrift.h
+++ b/lib/cpp/src/Thrift.h
@@ -26,8 +26,8 @@
 
 namespace facebook { namespace thrift {
 
-class TOutput{
-public:
+class TOutput {
+ public:
   TOutput() : f_(&perrorTimeWrapper) {}
 
   inline void setOutputFunction(void (*function)(const char *)){
@@ -47,7 +47,7 @@
     fprintf(stderr, "%s ", dbgtime);
     perror(msg);
   }
-private:
+ private:
   void (*f_)(const char *);
 };
 
@@ -58,7 +58,7 @@
 }
 
 class TException : public std::exception {
-public:
+ public:
   TException() {}
 
   TException(const std::string& message) :
@@ -74,13 +74,13 @@
     }
   }
 
-protected:
+ protected:
   std::string message_;
 
 };
 
 class TApplicationException : public TException {
-public:
+ public:
 
   /**
    * Error codes for the various types of exceptions.
@@ -134,7 +134,7 @@
   uint32_t read(protocol::TProtocol* iprot);
   uint32_t write(protocol::TProtocol* oprot) const;
 
-protected:
+ protected:
   /**
    * Error code
    */
diff --git a/lib/cpp/src/transport/TTransportException.h b/lib/cpp/src/transport/TTransportException.h
index bb8b8a9..9b75826 100644
--- a/lib/cpp/src/transport/TTransportException.h
+++ b/lib/cpp/src/transport/TTransportException.h
@@ -34,7 +34,9 @@
     TIMED_OUT = 3,
     END_OF_FILE = 4,
     INTERRUPTED = 5,
-    BAD_ARGS = 6
+    BAD_ARGS = 6,
+    CORRUPTED_DATA = 7,
+    INTERNAL_ERROR = 8,
   };
   
   TTransportException() :
diff --git a/lib/cpp/src/transport/TZlibTransport.cpp b/lib/cpp/src/transport/TZlibTransport.cpp
new file mode 100644
index 0000000..59e3a36
--- /dev/null
+++ b/lib/cpp/src/transport/TZlibTransport.cpp
@@ -0,0 +1,285 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#include <cassert>
+#include <algorithm>
+#include <transport/TZlibTransport.h>
+#include <zlib.h>
+
+using std::string;
+
+namespace facebook { namespace thrift { namespace transport { 
+
+// Don't call this outside of the constructor.
+void TZlibTransport::initZlib() {
+  int rv;
+  bool r_init = false;
+  try {
+    rstream_ = new z_stream;
+    wstream_ = new z_stream;
+
+    rstream_->zalloc = Z_NULL;
+    wstream_->zalloc = Z_NULL;
+    rstream_->zfree  = Z_NULL;
+    wstream_->zfree  = Z_NULL;
+    rstream_->opaque = Z_NULL;
+    wstream_->opaque = Z_NULL;
+
+    rstream_->next_in   = crbuf_;
+    wstream_->next_in   = uwbuf_;
+    rstream_->next_out  = urbuf_;
+    wstream_->next_out  = cwbuf_;
+    rstream_->avail_in  = 0;
+    wstream_->avail_in  = 0;
+    rstream_->avail_out = urbuf_size_;
+    wstream_->avail_out = cwbuf_size_;
+
+    rv = inflateInit(rstream_);
+    checkZlibRv(rv, rstream_->msg);
+
+    // Have to set this flag so we know whether to de-initialize.
+    r_init = true;
+
+    rv = deflateInit(wstream_, Z_DEFAULT_COMPRESSION);
+    checkZlibRv(rv, wstream_->msg);
+  }
+
+  catch (...) {
+    if (r_init) {
+      rv = inflateEnd(rstream_);
+      checkZlibRvNothrow(rv, rstream_->msg);
+    }
+    // There is no way we can get here if wstream_ was initialized.
+
+    throw;
+  }
+}
+
+inline void TZlibTransport::checkZlibRv(int status, const char* message) {
+  if (status != Z_OK) {
+    throw TZlibTransportException(status, message);
+  }
+}
+
+inline void TZlibTransport::checkZlibRvNothrow(int status, const char* message) {
+  if (status != Z_OK) {
+    string output = "TZlibTransport: zlib failure in destructor: " +
+      TZlibTransportException::errorMessage(status, message);
+    GlobalOutput(output.c_str());
+  }
+}
+
+TZlibTransport::~TZlibTransport() {
+  int rv;
+  rv = inflateEnd(rstream_);
+  checkZlibRvNothrow(rv, rstream_->msg);
+  rv = deflateEnd(wstream_);
+  checkZlibRvNothrow(rv, wstream_->msg);
+
+  delete[] urbuf_;
+  delete[] crbuf_;
+  delete[] uwbuf_;
+  delete[] cwbuf_;
+  delete rstream_;
+  delete wstream_;
+}
+
+bool TZlibTransport::isOpen() {
+  return (readAvail() > 0) || transport_->isOpen();
+}
+
+// READING STRATEGY
+//
+// We have two buffers for reading: one containing the compressed data (crbuf_)
+// and one containing the uncompressed data (urbuf_).  When read is called,
+// we repeat the following steps until we have satisfied the request:
+// - Copy data from urbuf_ into the caller's buffer.
+// - If we had enough, return.
+// - If urbuf_ is empty, read some data into it from the underlying transport.
+// - Inflate data from crbuf_ into urbuf_.
+//
+// In standalone objects, we set input_ended_ to true when inflate returns
+// Z_STREAM_END.  This allows to make sure that a checksum was verified.
+
+inline int TZlibTransport::readAvail() {
+  return urbuf_size_ - rstream_->avail_out - urpos_;
+}
+
+uint32_t TZlibTransport::read(uint8_t* buf, uint32_t len) {
+  int need = len;
+
+  // TODO(dreiss): Skip urbuf on big reads.
+
+  while (true) {
+    // Copy out whatever we have available, then give them the min of
+    // what we have and what they want, then advance indices.
+    int give = std::min(readAvail(), need);
+    memcpy(buf, urbuf_ + urpos_, give);
+    need -= give;
+    buf += give;
+    urpos_ += give;
+
+    // If they were satisfied, we are done.
+    if (need == 0) {
+      return len;
+    }
+
+    // If we get to this point, we need to get some more data.
+
+    // If zlib has reported the end of a stream, we can't really do any more.
+    if (input_ended_) {
+      return len - need;
+    }
+
+    // The uncompressed read buffer is empty, so reset the stream fields.
+    rstream_->next_out  = urbuf_;
+    rstream_->avail_out = urbuf_size_;
+    urpos_ = 0;
+
+    // If we don't have any more compressed data available,
+    // read some from the underlying transport.
+    if (rstream_->avail_in == 0) {
+      uint32_t got = transport_->read(crbuf_, crbuf_size_);
+      if (got == 0) {
+        return len - need;
+      }
+      rstream_->next_in  = crbuf_;
+      rstream_->avail_in = got;
+    }
+
+    // We have some compressed data now.  Uncompress it.
+    int zlib_rv = inflate(rstream_, Z_SYNC_FLUSH);
+
+    if (zlib_rv == Z_STREAM_END) {
+      if (standalone_) {
+        input_ended_ = true;
+      }
+    } else {
+      checkZlibRv(zlib_rv, rstream_->msg);
+    }
+
+    // Okay.  The read buffer should have whatever we can give it now.
+    // Loop back to the start and try to give some more.
+  }
+}
+
+
+// WRITING STRATEGY
+//
+// We buffer up small writes before sending them to zlib, so our logic is:
+// - Is the write big?
+//   - Send the buffer to zlib.
+//   - Send this data to zlib.
+// - Is the write small?
+//   - Is there insufficient space in the buffer for it?
+//     - Send the buffer to zlib.
+//   - Copy the data to the buffer.
+//
+// We have two buffers for writing also: the uncompressed buffer (mentioned
+// above) and the compressed buffer.  When sending data to zlib we loop over
+// the following until the source (uncompressed buffer or big write) is empty:
+// - Is there no more space in the compressed buffer?
+//   - Write the compressed buffer to the underlying transport.
+// - Deflate from the source into the compressed buffer.
+
+void TZlibTransport::write(const uint8_t* buf, uint32_t len) {
+  // zlib's "deflate" function has enough logic in it that I think
+  // we're better off (performance-wise) buffering up small writes.
+  if ((int)len > MIN_DIRECT_DEFLATE_SIZE) {
+    flushToZlib(uwbuf_, uwpos_);
+    uwpos_ = 0;
+    flushToZlib(buf, len);
+  } else if (len > 0) {
+    if (uwbuf_size_ - uwpos_ < (int)len) {
+      flushToZlib(uwbuf_, uwpos_);
+      uwpos_ = 0;
+    }
+    memcpy(uwbuf_ + uwpos_, buf, len);
+    uwpos_ += len;
+  }
+}
+
+void TZlibTransport::flush()  {
+  flushToZlib(uwbuf_, uwpos_, true);
+  assert((int)wstream_->avail_out != cwbuf_size_);
+  transport_->write(cwbuf_, cwbuf_size_ - wstream_->avail_out);
+  transport_->flush();
+}
+
+void TZlibTransport::flushToZlib(const uint8_t* buf, int len, bool finish) {
+  int flush = (finish ? Z_FINISH : Z_NO_FLUSH);
+
+  wstream_->next_in  = const_cast<uint8_t*>(buf);
+  wstream_->avail_in = len;
+
+  while (wstream_->avail_in > 0 || finish) {
+    // If our ouput buffer is full, flush to the underlying transport.
+    if (wstream_->avail_out == 0) {
+      transport_->write(cwbuf_, cwbuf_size_);
+      wstream_->next_out  = cwbuf_;
+      wstream_->avail_out = cwbuf_size_;
+    }
+
+    int zlib_rv = deflate(wstream_, flush);
+
+    if (finish && zlib_rv == Z_STREAM_END) {
+      assert(wstream_->avail_in == 0);
+      break;
+    }
+
+    checkZlibRv(zlib_rv, wstream_->msg);
+  }
+}
+
+bool TZlibTransport::borrow(uint8_t* buf, uint32_t len) {
+  // Don't try to be clever with shifting buffers.
+  // If we have enough data, give it, otherwise
+  // let the protcol use its slow path.
+  if (readAvail() >= (int)len) {
+    memcpy(buf, urbuf_ + urpos_, len);
+    return true;
+  }
+  return false;
+}
+
+void TZlibTransport::consume(uint32_t len) {
+  if (readAvail() >= (int)len) {
+    urpos_ += len;
+  } else {
+    throw TTransportException(TTransportException::BAD_ARGS,
+                              "consume did not follow a borrow.");
+  }
+}
+
+void TZlibTransport::verifyChecksum() {
+  if (!standalone_) {
+    throw TTransportException(
+        TTransportException::BAD_ARGS,
+        "TZLibTransport can only verify checksums for standalone objects.");
+  }
+
+  if (!input_ended_) {
+    // This should only be called when reading is complete,
+    // but it's possible that the whole checksum has not been fed to zlib yet.
+    // We try to read an extra byte here to force zlib to finish the stream.
+    // It might not always be easy to "unread" this byte,
+    // but we throw an exception if we get it, which is not really
+    // a recoverable error, so it doesn't matter.
+    uint8_t buf[1];
+    uint32_t got = this->read(buf, sizeof(buf));
+    if (got || !input_ended_) {
+      throw TTransportException(
+          TTransportException::CORRUPTED_DATA,
+          "Zlib stream not complete.");
+    }
+  }
+
+  // If the checksum had been bad, we would have gotten an error while
+  // inflating.
+}
+
+
+}}} // facebook::thrift::transport
diff --git a/lib/cpp/src/transport/TZlibTransport.h b/lib/cpp/src/transport/TZlibTransport.h
new file mode 100644
index 0000000..cc2522d
--- /dev/null
+++ b/lib/cpp/src/transport/TZlibTransport.h
@@ -0,0 +1,207 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#ifndef _THRIFT_TRANSPORT_TZLIBTRANSPORT_H_
+#define _THRIFT_TRANSPORT_TZLIBTRANSPORT_H_ 1
+
+#include <boost/lexical_cast.hpp>
+#include <transport/TTransport.h>
+
+struct z_stream_s;
+
+namespace facebook { namespace thrift { namespace transport { 
+
+class TZlibTransportException : public TTransportException {
+ public:
+  TZlibTransportException(int status, const char* msg) :
+    TTransportException(TTransportException::INTERNAL_ERROR,
+                        errorMessage(status, msg)),
+    zlib_status_(status),
+    zlib_msg_(msg == NULL ? "(null)" : msg) {}
+
+  virtual ~TZlibTransportException() throw() {}
+
+  int getZlibStatus() { return zlib_status_; }
+  std::string getZlibMessage() { return zlib_msg_; }
+
+  static std::string errorMessage(int status, const char* msg) {
+    std::string rv = "zlib error: ";
+    if (msg) {
+      rv += msg;
+    } else {
+      rv += "(no message)";
+    }
+    rv += " (status = ";
+    rv += boost::lexical_cast<std::string>(status);
+    rv += ")";
+    return rv;
+  }
+
+  int zlib_status_;
+  std::string zlib_msg_;
+};
+
+/**
+ * This transport uses zlib's compressed format on the "far" side.
+ *
+ * There are two kinds of TZlibTransport objects:
+ * - Standalone objects are used to encode self-contained chunks of data
+ *   (like structures).  They include checksums.
+ * - Non-standalone transports are used for RPC.  They are not implemented yet.
+ *
+ * TODO(dreiss): Don't do an extra copy of the compressed data if
+ *               the underlying transport is TBuffered or TMemory.
+ *
+ * @author David Reiss <dreiss@facebook.com>
+ */
+class TZlibTransport : public TTransport {
+ public:
+
+  /**
+   * @param transport    The transport to read compressed data from
+   *                     and write compressed data to.
+   * @param use_for_rpc  True if this object will be used for RPC,
+   *                     false if this is a standalone object.
+   * @param urbuf_size   Uncompressed buffer size for reading.
+   * @param crbuf_size   Compressed buffer size for reading.
+   * @param uwbuf_size   Uncompressed buffer size for writing.
+   * @param cwbuf_size   Compressed buffer size for writing.
+   *
+   * TODO(dreiss): Write a constructor that isn't a pain.
+   */
+  TZlibTransport(boost::shared_ptr<TTransport> transport,
+                 bool use_for_rpc,
+                 int urbuf_size = DEFAULT_URBUF_SIZE,
+                 int crbuf_size = DEFAULT_CRBUF_SIZE,
+                 int uwbuf_size = DEFAULT_UWBUF_SIZE,
+                 int cwbuf_size = DEFAULT_CWBUF_SIZE) :
+    transport_(transport),
+    standalone_(!use_for_rpc),
+    urpos_(0),
+    uwpos_(0),
+    input_ended_(false),
+    output_flushed_(false),
+    urbuf_size_(urbuf_size),
+    crbuf_size_(crbuf_size),
+    uwbuf_size_(uwbuf_size),
+    cwbuf_size_(cwbuf_size),
+    urbuf_(NULL),
+    crbuf_(NULL),
+    uwbuf_(NULL),
+    cwbuf_(NULL),
+    rstream_(NULL),
+    wstream_(NULL)
+  {
+
+    if (!standalone_) {
+      throw TTransportException(
+          TTransportException::BAD_ARGS,
+          "TZLibTransport has not been tested for RPC.");
+    }
+
+    if (uwbuf_size_ < MIN_DIRECT_DEFLATE_SIZE) {
+      // Have to copy this into a local because of a linking issue.
+      int minimum = MIN_DIRECT_DEFLATE_SIZE;
+      throw TTransportException(
+          TTransportException::BAD_ARGS,
+          "TZLibTransport: uncompressed write buffer must be at least"
+          + boost::lexical_cast<std::string>(minimum) + ".");
+    }
+
+    try {
+      urbuf_ = new uint8_t[urbuf_size];
+      crbuf_ = new uint8_t[crbuf_size];
+      uwbuf_ = new uint8_t[uwbuf_size];
+      cwbuf_ = new uint8_t[cwbuf_size];
+
+      // Don't call this outside of the constructor.
+      initZlib();
+
+    } catch (...) {
+      delete[] urbuf_;
+      delete[] crbuf_;
+      delete[] uwbuf_;
+      delete[] cwbuf_;
+      throw;
+    }
+  }
+
+  // Don't call this outside of the constructor.
+  void initZlib();
+
+  ~TZlibTransport();
+
+  bool isOpen();
+  
+  void open() {
+    transport_->open();
+  }
+
+  void close() {
+    transport_->close();
+  }
+
+  uint32_t read(uint8_t* buf, uint32_t len);
+  
+  void write(const uint8_t* buf, uint32_t len);
+
+  void flush();
+
+  bool borrow(uint8_t* buf, uint32_t len);
+
+  void consume(uint32_t len);
+
+  void verifyChecksum();
+
+   /**
+    * TODO(someone_smart): Choose smart defaults.
+    */
+  static const int DEFAULT_URBUF_SIZE = 128;
+  static const int DEFAULT_CRBUF_SIZE = 1024;
+  static const int DEFAULT_UWBUF_SIZE = 128;
+  static const int DEFAULT_CWBUF_SIZE = 1024;
+
+ protected:
+
+  inline void checkZlibRv(int status, const char* msg);
+  inline void checkZlibRvNothrow(int status, const char* msg);
+  inline int readAvail();
+  void flushToZlib(const uint8_t* buf, int len, bool finish = false);
+
+  // Writes smaller than this are buffered up.
+  // Larger (or equal) writes are dumped straight to zlib.
+  static const int MIN_DIRECT_DEFLATE_SIZE = 32;
+
+  boost::shared_ptr<TTransport> transport_;
+  bool standalone_;
+
+  int urpos_;
+  int uwpos_;
+
+  /// True iff zlib has reached the end of a stream.
+  /// This is only ever true in standalone protcol objects.
+  bool input_ended_;
+  /// True iff we have flushed the output stream.
+  /// This is only ever true in standalone protcol objects.
+  bool output_flushed_;
+
+  int urbuf_size_;
+  int crbuf_size_;
+  int uwbuf_size_;
+  int cwbuf_size_;
+
+  uint8_t* urbuf_;
+  uint8_t* crbuf_;
+  uint8_t* uwbuf_;
+  uint8_t* cwbuf_;
+
+  struct z_stream_s* rstream_;
+  struct z_stream_s* wstream_;
+};
+
+}}} // facebook::thrift::transport
+
+#endif // #ifndef _THRIFT_TRANSPORT_TZLIBTRANSPORT_H_