C++ CHttpRanges::IsEmpty方法代码示例

bool CWebServer::IsRequestRanged(const HTTPRequest& request, const CDateTime &lastModified) const
{
  // parse the Range header and store it in the request object
  CHttpRanges ranges;
  bool ranged = ranges.Parse(HTTPRequestHandlerUtils::GetRequestHeaderValue(request.connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_RANGE));

  // handle If-Range header but only if the Range header is present
  if (ranged && lastModified.IsValid())
  {
    std::string ifRange = HTTPRequestHandlerUtils::GetRequestHeaderValue(request.connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_IF_RANGE);
    if (!ifRange.empty() && lastModified.IsValid())
    {
      CDateTime ifRangeDate;
      ifRangeDate.SetFromRFC1123DateTime(ifRange);

      // check if the last modification is newer than the If-Range date
      // if so we have to server the whole file instead
      if (lastModified.GetAsUTCDateTime() > ifRangeDate)
        ranges.Clear();
    }
  }

  return !ranges.IsEmpty();
}

//.........这里部分代码省略.........
              {
                struct MHD_Response *response = MHD_create_response_from_data(0, NULL, MHD_NO, MHD_NO);
                if (response == NULL)
                {
                  CLog::Log(LOGERROR, "CWebServer: failed to create a HTTP 304 response");
                  return MHD_NO;
                }

                return FinalizeRequest(handler, MHD_HTTP_NOT_MODIFIED, response);
              }
              // handle If-Unmodified-Since
              else if (ifUnmodifiedSinceDate.SetFromRFC1123DateTime(ifUnmodifiedSince) &&
                lastModified.GetAsUTCDateTime() > ifUnmodifiedSinceDate)
                return SendErrorResponse(connection, MHD_HTTP_PRECONDITION_FAILED, methodType);
            }

            // handle If-Range header but only if the Range header is present
            if (ranged && lastModified.IsValid())
            {
              std::string ifRange = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_IF_RANGE);
              if (!ifRange.empty() && lastModified.IsValid())
              {
                CDateTime ifRangeDate;
                ifRangeDate.SetFromRFC1123DateTime(ifRange);

                // check if the last modification is newer than the If-Range date
                // if so we have to server the whole file instead
                if (lastModified.GetAsUTCDateTime() > ifRangeDate)
                  ranges.Clear();
              }
            }

            // pass the requested ranges on to the request handler
            handler->SetRequestRanged(!ranges.IsEmpty());
          }
        }
        // if we got a POST request we need to take care of the POST data
        else if (methodType == POST)
        {
          conHandler->requestHandler = handler;

          // get the content-type of the POST data
          std::string contentType = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_CONTENT_TYPE);
          if (!contentType.empty())
          {
            // if the content-type is application/x-ww-form-urlencoded or multipart/form-data we can use MHD's POST processor
            if (StringUtils::EqualsNoCase(contentType, MHD_HTTP_POST_ENCODING_FORM_URLENCODED) ||
                StringUtils::EqualsNoCase(contentType, MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA))
            {
              // Get a new MHD_PostProcessor
              conHandler->postprocessor = MHD_create_post_processor(connection, MAX_POST_BUFFER_SIZE, &CWebServer::HandlePostField, (void*)conHandler.get());

              // MHD doesn't seem to be able to handle this post request
              if (conHandler->postprocessor == NULL)
              {
                CLog::Log(LOGERROR, "CWebServer: unable to create HTTP POST processor for %s", url);

                delete conHandler->requestHandler;

                return SendErrorResponse(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, methodType);
              }
            }
          }

          // otherwise we need to handle the POST data ourselves which is done in the next call to AnswerToConnection
          // as ownership of the connection handler is passed to libmicrohttpd we must not destroy it 

  void CheckRangesTestFileResponse(const CCurlFile& curl, const std::string& result, const CHttpRanges& ranges)
  {
    // get the HTTP header details
    const CHttpHeader& httpHeader = curl.GetHttpHeader();

    // check the protocol line for the expected HTTP status
    std::string httpStatusString = StringUtils::Format(" %d ", MHD_HTTP_PARTIAL_CONTENT);
    std::string protocolLine = httpHeader.GetProtoLine();
    ASSERT_TRUE(protocolLine.find(httpStatusString) != std::string::npos);

    // Accept-Ranges must be "bytes"
    EXPECT_STREQ("bytes", httpHeader.GetValue(MHD_HTTP_HEADER_ACCEPT_RANGES).c_str());

    // check Last-Modified
    CDateTime lastModified;
    ASSERT_TRUE(GetLastModifiedOfTestFile(TEST_FILES_RANGES, lastModified));
    ASSERT_STREQ(lastModified.GetAsRFC1123DateTime().c_str(), httpHeader.GetValue(MHD_HTTP_HEADER_LAST_MODIFIED).c_str());

    // Cache-Control must contain "mag-age=0" and "no-cache"
    std::string cacheControl = httpHeader.GetValue(MHD_HTTP_HEADER_CACHE_CONTROL);
    EXPECT_TRUE(cacheControl.find("max-age=31536000") != std::string::npos);
    EXPECT_TRUE(cacheControl.find("public") != std::string::npos);

    // If there's no range Content-Length must be "20"
    if (ranges.IsEmpty())
    {
      EXPECT_STREQ("20", httpHeader.GetValue(MHD_HTTP_HEADER_CONTENT_LENGTH).c_str());
      EXPECT_STREQ(TEST_FILES_DATA_RANGES, result.c_str());
      return;
    }

    // check Content-Range
    uint64_t firstPosition, lastPosition;
    ASSERT_TRUE(ranges.GetFirstPosition(firstPosition));
    ASSERT_TRUE(ranges.GetLastPosition(lastPosition));
    EXPECT_STREQ(HttpRangeUtils::GenerateContentRangeHeaderValue(firstPosition, lastPosition, 20).c_str(), httpHeader.GetValue(MHD_HTTP_HEADER_CONTENT_RANGE).c_str());

    std::string expectedContent = TEST_FILES_DATA_RANGES;
    const std::string expectedContentType = "text/plain";
    if (ranges.Size() == 1)
    {
      // Content-Type must be "text/html"
      EXPECT_STREQ(expectedContentType.c_str(), httpHeader.GetMimeType().c_str());

      // check the content
      CHttpRange firstRange;
      ASSERT_TRUE(ranges.GetFirst(firstRange));
      expectedContent = expectedContent.substr(firstRange.GetFirstPosition(), firstRange.GetLength());
      EXPECT_STREQ(expectedContent.c_str(), result.c_str());

      // and Content-Length
      EXPECT_STREQ(StringUtils::Format("%u", static_cast<unsigned int>(expectedContent.size())).c_str(), httpHeader.GetValue(MHD_HTTP_HEADER_CONTENT_LENGTH).c_str());

      return;
    }

    // Content-Type contains the multipart boundary
    const std::string expectedMimeType = "multipart/byteranges";
    std::string mimeType = httpHeader.GetMimeType();
    ASSERT_STREQ(expectedMimeType.c_str(), mimeType.c_str());

    std::string contentType = httpHeader.GetValue(MHD_HTTP_HEADER_CONTENT_TYPE);
    std::string contentTypeStart = expectedMimeType + "; boundary=";
    // it must start with "multipart/byteranges; boundary=" followed by the boundary
    ASSERT_EQ(0, contentType.find(contentTypeStart));
    ASSERT_GT(contentType.size(), contentTypeStart.size());
    // extract the boundary
    std::string multipartBoundary = contentType.substr(contentTypeStart.size());
    ASSERT_FALSE(multipartBoundary.empty());
    multipartBoundary = "--" + multipartBoundary;

    ASSERT_EQ(0, result.find(multipartBoundary));
    std::vector<std::string> rangeParts = StringUtils::Split(result, multipartBoundary);
    // the first part is not really a part and is therefore empty (the place before the first boundary)
    ASSERT_TRUE(rangeParts.front().empty());
    rangeParts.erase(rangeParts.begin());
    // the last part is the end of the end multipart boundary
    ASSERT_STREQ("--", rangeParts.back().c_str());
    rangeParts.erase(rangeParts.begin() + rangeParts.size() - 1);
    ASSERT_EQ(ranges.Size(), rangeParts.size());

    for (size_t i = 0; i < rangeParts.size(); ++i)
    {
      std::string data = rangeParts.at(i);
      StringUtils::Trim(data, " \r\n");

      // find the separator between header and data
      size_t pos = data.find("\r\n\r\n");
      ASSERT_NE(std::string::npos, pos);

      std::string header = data.substr(0, pos + 4);
      data = data.substr(pos + 4);

      // get the expected range
      CHttpRange range;
      ASSERT_TRUE(ranges.Get(i, range));

      // parse the header of the range part
      CHttpHeader rangeHeader;
      rangeHeader.Parse(header);
//.........这里部分代码省略.........