public ModelBuilderFactory(
IManifestExtractor manifestExtractor,
IMetaExtractor metaExtractor,
IFileExtractor fileExtractor,
INavigationExtractor navigationExtractor)
{
this.manifestExtractor = manifestExtractor;
this.metaExtractor = metaExtractor;
this.fileExtractor = fileExtractor;
this.navigationExtractor = navigationExtractor;
}
public async Task Consume(ConsumeContext <ExtractMeta> context)
{
try
{
var blob = await blobStorage.GetFileAsync(context.Message.BlobId, context.Message.Bucket);
IEnumerable <Property> meta = null;
IMetaExtractor extractor = null;
var tempFilePath = Path.GetTempFileName();
using (var fileStream = File.Create(tempFilePath))
{
blob.GetContentAsStream().CopyTo(fileStream);
}
using (FileStream fs = new FileStream(tempFilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.None,
4096, FileOptions.RandomAccess | FileOptions.DeleteOnClose))
{
switch (Path.GetExtension(blob.Info.FileName).ToLower())
{
case ".doc":
case ".docx":
case ".odt":
extractor = new DocMetaExtractor();
meta = extractor.GetMeta(fs);
break;
case ".xls":
case ".xlsx":
case ".ods":
extractor = new ExcelMetaExtractor();
meta = extractor.GetMeta(fs);
break;
case ".ppt":
case ".pptx":
case ".odp":
extractor = new PresentationMetaExtractor();
meta = extractor.GetMeta(fs);
break;
default:
await context.Publish <MetaExtractionFailed>(new
{
Id = context.Message.Id,
UserId = context.Message.UserId,
TimeStamp = DateTimeOffset.UtcNow,
CorrelationId = context.Message.CorrelationId,
Message = $"Cannot find file converter for {blob.Info.FileName}"
});
break;
}
await context.Publish <MetaExtracted>(new
{
Bucket = context.Message.Bucket,
BlobId = context.Message.BlobId,
Meta = meta,
Id = context.Message.Id,
UserId = context.Message.UserId,
TimeStamp = DateTimeOffset.UtcNow,
CorrelationId = context.Message.CorrelationId
});
}
}
catch (Exception e)
{
await context.Publish <MetaExtractionFailed>(new
{
Id = context.Message.Id,
UserId = context.Message.UserId,
TimeStamp = DateTimeOffset.UtcNow,
CorrelationId = context.Message.CorrelationId,
Message = $"Cannot convert file to pdf from bucket {context.Message.Bucket} with Id {context.Message.BlobId}. Error: {e.Message}"
});
}
}
public TextProcessor(ILinkExtractor linkExtractor, IHtmlExtractor htmlExtractor, IMetaExtractor metaExtractor)
{
_linkExtractor = linkExtractor;
_htmlExtractor = htmlExtractor;
_metaExtractor = metaExtractor;
}
