C++ CDateTime::Reset方法代码示例

int CWebServer::CreateFileDownloadResponse(struct MHD_Connection *connection, const string &strURL, HTTPMethod methodType, struct MHD_Response *&response, int &responseCode)
{
  CFile *file = new CFile();

#ifdef WEBSERVER_DEBUG
  CLog::Log(LOGDEBUG, "webserver  [IN] %s", strURL.c_str());
  multimap<string, string> headers;
  if (GetRequestHeaderValues(connection, MHD_HEADER_KIND, headers) > 0)
  {
    for (multimap<string, string>::const_iterator header = headers.begin(); header != headers.end(); header++)
      CLog::Log(LOGDEBUG, "webserver  [IN] %s: %s", header->first.c_str(), header->second.c_str());
  }
#endif

  if (file->Open(strURL, READ_NO_CACHE))
  {
    bool getData = true;
    bool ranged = false;
    int64_t fileLength = file->GetLength();

    // try to get the file's last modified date
    CDateTime lastModified;
    if (!GetLastModifiedDateTime(file, lastModified))
      lastModified.Reset();

    // get the MIME type for the Content-Type header
    CStdString ext = URIUtils::GetExtension(strURL);
    ext = ext.ToLower();
    string mimeType = CreateMimeTypeFromExtension(ext.c_str());

    if (methodType != HEAD)
    {
      int64_t firstPosition = 0;
      int64_t lastPosition = fileLength - 1;
      uint64_t totalLength = 0;
      HttpFileDownloadContext *context = new HttpFileDownloadContext();
      context->file = file;
      context->rangesLength = fileLength;
      context->contentType = mimeType;
      context->boundaryWritten = false;
      context->writePosition = 0;

      if (methodType == GET)
      {
        // handle If-Modified-Since
        string ifModifiedSince = GetRequestHeaderValue(connection, MHD_HEADER_KIND, "If-Modified-Since");
        if (!ifModifiedSince.empty() && lastModified.IsValid())
        {
          CDateTime ifModifiedSinceDate;
          ifModifiedSinceDate.SetFromRFC1123DateTime(ifModifiedSince);

          if (lastModified.GetAsUTCDateTime() <= ifModifiedSinceDate)
          {
            getData = false;
            response = MHD_create_response_from_data(0, NULL, MHD_NO, MHD_NO);
            responseCode = MHD_HTTP_NOT_MODIFIED;
          }
        }

        if (getData)
        {
          // handle Range header
          context->rangesLength = ParseRangeHeader(GetRequestHeaderValue(connection, MHD_HEADER_KIND, "Range"), fileLength, context->ranges, firstPosition, lastPosition);

          // handle If-Range header but only if the Range header is present
          if (!context->ranges.empty())
          {
            string ifRange = GetRequestHeaderValue(connection, MHD_HEADER_KIND, "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)
                context->ranges.clear();
            }
          }
        }
      }

      if (getData)
      {
        // if there are no ranges, add the whole range
        if (context->ranges.empty() || context->rangesLength == fileLength)
        {
          if (context->rangesLength == fileLength)
            context->ranges.clear();

          context->ranges.push_back(HttpRange(0, fileLength - 1));
          context->rangesLength = fileLength;
          firstPosition = 0;
          lastPosition = fileLength - 1;
        }
        else
          responseCode = MHD_HTTP_PARTIAL_CONTENT;

        // remember the total number of ranges
        context->rangeCount = context->ranges.size();
//.........这里部分代码省略.........

int CWebServer::CreateFileDownloadResponse(struct MHD_Connection *connection, const string &strURL, HTTPMethod methodType, struct MHD_Response *&response, int &responseCode)
{
  boost::shared_ptr<CFile> file = boost::make_shared<CFile>();

#ifdef WEBSERVER_DEBUG
  CLog::Log(LOGDEBUG, "webserver  [IN] %s", strURL.c_str());
  multimap<string, string> headers;
  if (GetRequestHeaderValues(connection, MHD_HEADER_KIND, headers) > 0)
  {
    for (multimap<string, string>::const_iterator header = headers.begin(); header != headers.end(); header++)
      CLog::Log(LOGDEBUG, "webserver  [IN] %s: %s", header->first.c_str(), header->second.c_str());
  }
#endif

  if (!file->Open(strURL, READ_NO_CACHE))
  {
    CLog::Log(LOGERROR, "WebServer: Failed to open %s", strURL.c_str());
    return SendErrorResponse(connection, MHD_HTTP_NOT_FOUND, methodType);
  }

  bool getData = true;
  bool ranged = false;
  int64_t fileLength = file->GetLength();

  // try to get the file's last modified date
  CDateTime lastModified;
  if (!GetLastModifiedDateTime(file.get(), lastModified))
    lastModified.Reset();

  // get the MIME type for the Content-Type header
  std::string ext = URIUtils::GetExtension(strURL);
  StringUtils::ToLower(ext);
  string mimeType = CreateMimeTypeFromExtension(ext.c_str());

  if (methodType != HEAD)
  {
    int64_t firstPosition = 0;
    int64_t lastPosition = fileLength - 1;
    uint64_t totalLength = 0;
    std::auto_ptr<HttpFileDownloadContext> context(new HttpFileDownloadContext());
    context->file = file;
    context->rangesLength = fileLength;
    context->contentType = mimeType;
    context->boundaryWritten = false;
    context->writePosition = 0;

    if (methodType == GET)
    {
      bool cacheable = true;

      // handle Cache-Control
      string cacheControl = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_CACHE_CONTROL);
      if (!cacheControl.empty())
      {
        vector<string> cacheControls = StringUtils::Split(cacheControl, ",");
        for (vector<string>::const_iterator it = cacheControls.begin(); it != cacheControls.end(); ++it)
        {
          string control = *it;
          control = StringUtils::Trim(control);

          // handle no-cache
          if (control.compare(HEADER_VALUE_NO_CACHE) == 0)
            cacheable = false;
        }
      }

      if (cacheable)
      {
        // handle Pragma (but only if "Cache-Control: no-cache" hasn't been set)
        string pragma = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_PRAGMA);
        if (pragma.compare(HEADER_VALUE_NO_CACHE) == 0)
          cacheable = false;
      }

      if (lastModified.IsValid())
      {
        // handle If-Modified-Since or If-Unmodified-Since
        string ifModifiedSince = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_IF_MODIFIED_SINCE);
        string ifUnmodifiedSince = GetRequestHeaderValue(connection, MHD_HEADER_KIND, MHD_HTTP_HEADER_IF_UNMODIFIED_SINCE);

        CDateTime ifModifiedSinceDate;
        CDateTime ifUnmodifiedSinceDate;
        // handle If-Modified-Since (but only if the response is cacheable)
        if (cacheable &&
            ifModifiedSinceDate.SetFromRFC1123DateTime(ifModifiedSince) &&
            lastModified.GetAsUTCDateTime() <= ifModifiedSinceDate)
        {
          getData = false;
          response = MHD_create_response_from_data(0, NULL, MHD_NO, MHD_NO);
          if (response == NULL)
            return MHD_NO;

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

//.........这里部分代码省略.........