fizz::ZlibCertificateCompressor Class Reference

#include <ZlibCertificateCompressor.h>

Inheritance diagram for fizz::ZlibCertificateCompressor:

Public Member Functions
	ZlibCertificateCompressor (int compressLevel)
	~ZlibCertificateCompressor () override=default
CertificateCompressionAlgorithm	getAlgorithm () const override
CompressedCertificate	compress (const CertificateMsg &) override
Public Member Functions inherited from fizz::CertificateCompressor
virtual	~CertificateCompressor ()=default

Private Attributes
const int	level_

Detailed Description

Definition at line 15 of file ZlibCertificateCompressor.h.

Constructor & Destructor Documentation

fizz::ZlibCertificateCompressor::ZlibCertificateCompressor ( int  compressLevel )

explicit

Definition at line 15 of file ZlibCertificateCompressor.cpp.

    : level_(compressLevel) {
  if (compressLevel != Z_DEFAULT_COMPRESSION &&
      !(compressLevel >= Z_NO_COMPRESSION &&
        compressLevel <= Z_BEST_COMPRESSION)) {
    throw std::runtime_error(
        "Invalid compression level requested:" +
        to<std::string>(compressLevel));
  }
}

fizz::ZlibCertificateCompressor::~ZlibCertificateCompressor ( )

overridedefault

Member Function Documentation

CompressedCertificate fizz::ZlibCertificateCompressor::compress ( const CertificateMsg &  cert )

overridevirtual

Implements fizz::CertificateCompressor.

Definition at line 31 of file ZlibCertificateCompressor.cpp.

References fizz::CompressedCertificate::algorithm, cc, fizz::CompressedCertificate::compressed_certificate_message, fizz::encode(), getAlgorithm(), level_, folly::gen::move, folly::size(), and fizz::CompressedCertificate::uncompressed_length.

                                {
  auto encoded = encode(cert);
  auto certRange = encoded->coalesce();
  auto compressedCert = IOBuf::create(compressBound(certRange.size()));
  unsigned long size = compressedCert->capacity();

  int status = ::compress2(
      compressedCert->writableData(),
      &size,
      certRange.data(),
      certRange.size(),
      level_);
  switch (status) {
    case Z_OK:
      compressedCert->append(size);
      break;
    case Z_MEM_ERROR:
      throw std::runtime_error("Insufficient memory to compress cert");
    case Z_BUF_ERROR:
      throw std::runtime_error("Buffer too small for compressed cert");
    case Z_STREAM_ERROR:
      throw std::runtime_error(
          "Compression level invalid: " + to<std::string>(level_));
    default:
      throw std::runtime_error(
          "Failed to compress: " + to<std::string>(status));
  }

  CompressedCertificate cc;
  cc.uncompressed_length = certRange.size();
  cc.algorithm = getAlgorithm();
  cc.compressed_certificate_message = std::move(compressedCert);
  return cc;
}

CertificateCompressionAlgorithm fizz::ZlibCertificateCompressor::getAlgorithm ( ) const

overridevirtual

Implements fizz::CertificateCompressor.

Definition at line 26 of file ZlibCertificateCompressor.cpp.

References fizz::zlib.

Referenced by compress().

          {
  return CertificateCompressionAlgorithm::zlib;
}

Member Data Documentation

const int fizz::ZlibCertificateCompressor::level_

private

Definition at line 25 of file ZlibCertificateCompressor.h.

Referenced by compress().

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The documentation for this class was generated from the following files:

• proxygen/fizz/fizz/protocol/ZlibCertificateCompressor.h
• proxygen/fizz/fizz/protocol/ZlibCertificateCompressor.cpp