Response FileClient::GetRangeList()

in sdk/storage/azure-storage-files-shares/src/rest_client.cpp [4342:4482]
141 lines of code
45 McCabe index (conditional complexity)

    Response<Models::GetFileRangeListResult> FileClient::GetRangeList(
        Core::Http::_internal::HttpPipeline& pipeline,
        const Core::Url& url,
        const GetFileRangeListOptions& options,
        const Core::Context& context)
    {
      auto request = Core::Http::Request(Core::Http::HttpMethod::Get, url);
      request.GetUrl().AppendQueryParameter("comp", "rangelist");
      if (options.Sharesnapshot.HasValue() && !options.Sharesnapshot.Value().empty())
      {
        request.GetUrl().AppendQueryParameter(
            "sharesnapshot", _internal::UrlEncodeQueryParameter(options.Sharesnapshot.Value()));
      }
      if (options.Prevsharesnapshot.HasValue() && !options.Prevsharesnapshot.Value().empty())
      {
        request.GetUrl().AppendQueryParameter(
            "prevsharesnapshot",
            _internal::UrlEncodeQueryParameter(options.Prevsharesnapshot.Value()));
      }
      request.SetHeader("x-ms-version", "2025-05-05");
      if (options.Range.HasValue() && !options.Range.Value().empty())
      {
        request.SetHeader("x-ms-range", options.Range.Value());
      }
      if (options.LeaseId.HasValue() && !options.LeaseId.Value().empty())
      {
        request.SetHeader("x-ms-lease-id", options.LeaseId.Value());
      }
      if (options.AllowTrailingDot.HasValue())
      {
        request.SetHeader(
            "x-ms-allow-trailing-dot", options.AllowTrailingDot.Value() ? "true" : "false");
      }
      if (options.FileRequestIntent.HasValue()
          && !options.FileRequestIntent.Value().ToString().empty())
      {
        request.SetHeader("x-ms-file-request-intent", options.FileRequestIntent.Value().ToString());
      }
      if (options.SupportRename.HasValue())
      {
        request.SetHeader(
            "x-ms-file-support-rename", options.SupportRename.Value() ? "true" : "false");
      }
      auto pRawResponse = pipeline.Send(request, context);
      auto httpStatusCode = pRawResponse->GetStatusCode();
      if (httpStatusCode != Core::Http::HttpStatusCode::Ok)
      {
        throw StorageException::CreateFromResponse(std::move(pRawResponse));
      }
      Models::GetFileRangeListResult response;
      {
        const auto& responseBody = pRawResponse->GetBody();
        _internal::XmlReader reader(
            reinterpret_cast<const char*>(responseBody.data()), responseBody.size());
        enum class XmlTagEnum
        {
          kUnknown,
          kRanges,
          kRange,
          kStart,
          kEnd,
          kClearRange,
        };
        const std::unordered_map<std::string, XmlTagEnum> XmlTagEnumMap{
            {"Ranges", XmlTagEnum::kRanges},
            {"Range", XmlTagEnum::kRange},
            {"Start", XmlTagEnum::kStart},
            {"End", XmlTagEnum::kEnd},
            {"ClearRange", XmlTagEnum::kClearRange},
        };
        std::vector<XmlTagEnum> xmlPath;
        Core::Http::HttpRange vectorElement1;
        Core::Http::HttpRange vectorElement2;
        while (true)
        {
          auto node = reader.Read();
          if (node.Type == _internal::XmlNodeType::End)
          {
            break;
          }
          else if (node.Type == _internal::XmlNodeType::StartTag)
          {
            auto ite = XmlTagEnumMap.find(node.Name);
            xmlPath.push_back(ite == XmlTagEnumMap.end() ? XmlTagEnum::kUnknown : ite->second);
          }
          else if (node.Type == _internal::XmlNodeType::Text)
          {
            if (xmlPath.size() == 3 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kRange && xmlPath[2] == XmlTagEnum::kStart)
            {
              vectorElement1.Offset = std::stoll(node.Value);
            }
            else if (
                xmlPath.size() == 3 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kRange && xmlPath[2] == XmlTagEnum::kEnd)
            {
              vectorElement1.Length = std::stoll(node.Value);
            }
            else if (
                xmlPath.size() == 3 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kClearRange && xmlPath[2] == XmlTagEnum::kStart)
            {
              vectorElement2.Offset = std::stoll(node.Value);
            }
            else if (
                xmlPath.size() == 3 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kClearRange && xmlPath[2] == XmlTagEnum::kEnd)
            {
              vectorElement2.Length = std::stoll(node.Value);
            }
          }
          else if (node.Type == _internal::XmlNodeType::Attribute)
          {
          }
          else if (node.Type == _internal::XmlNodeType::EndTag)
          {
            if (xmlPath.size() == 2 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kRange)
            {
              vectorElement1.Length = vectorElement1.Length.Value() - vectorElement1.Offset + 1;
              response.Ranges.push_back(std::move(vectorElement1));
              vectorElement1 = Core::Http::HttpRange();
            }
            else if (
                xmlPath.size() == 2 && xmlPath[0] == XmlTagEnum::kRanges
                && xmlPath[1] == XmlTagEnum::kClearRange)
            {
              vectorElement2.Length = vectorElement2.Length.Value() - vectorElement2.Offset + 1;
              response.ClearRanges.push_back(std::move(vectorElement2));
              vectorElement2 = Core::Http::HttpRange();
            }
            xmlPath.pop_back();
          }
        }
      }
      response.LastModified = DateTime::Parse(
          pRawResponse->GetHeaders().at("Last-Modified"), Azure::DateTime::DateFormat::Rfc1123);
      response.ETag = ETag(pRawResponse->GetHeaders().at("ETag"));
      response.FileSize = std::stoll(pRawResponse->GetHeaders().at("x-ms-content-length"));
      return Response<Models::GetFileRangeListResult>(std::move(response), std::move(pRawResponse));
    }