zip 文件中的 Pdfs 已损坏
Pdfs inside zip file are corrupted
我正在尝试制作一个包含 pdf 的 zip 文件。当我解压缩 zip 时,pdf 已损坏。我在 'outputStream' 上放了一块表。这是第一个例外
'outputStream.Length' threw an exception of type 'System.NotSupportedException' long
这是整块手表
代码
[HttpPost]
[ActionName("ZipFileAction")]
public HttpResponseMessage ZipFiles([FromBody]int[] id)
{
if (id == null)
{//Required IDs were not provided
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.BadRequest));
}
List<Document> documents = new List<Document>();
using (var context = new ApplicationDbContext())
{
foreach (int NextDocument in id)
{
Document document = context.Documents.Find(NextDocument);
if (document == null)
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
documents.Add(document);
}
var streamContent = new PushStreamContent((outputStream, httpContext, transportContent) =>
{
try
{
using (var zipFile = new ZipFile())
{
foreach (var d in documents)
{
var dt = d.DocumentDate.ToString("y").Replace('/', '-').Replace(':', '-');
string fileName = String.Format("{0}-{1}-{2}.pdf", dt, d.PipeName, d.LocationAb);
zipFile.AddEntry(fileName, d.DocumentUrl);
}
zipFile.Save(outputStream); //Null Reference Exception
}
}
finally
{
outputStream.Close();
}
});
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
streamContent.Headers.ContentDisposition.FileName = "reports.zip";
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = streamContent
};
return response;
}
PushStreamContent
用于数据流。我认为您应该创建一个临时 zip 文件,并将其传递给 Response
.
例子
public FileResult ZipFiles(...)
{
// create a temporary file
return File("path/to/file.zip", System.Net.Mime.MediaTypeNames.Application.Octet);
}
问题原来是我没有在 pdf 中保存任何内容。我只是在保存 documentUrl。所以通过使用 FileInfo 来改变事情。工作代码
[HttpPost]
[ActionName("ZipFileAction")]
public HttpResponseMessage ZipFiles([FromBody]int[] id)
{
if (id == null)
{//Required IDs were not provided
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.BadRequest));
}
List<Document> documents = new List<Document>();
using (var context = new ApplicationDbContext())
{
foreach (int NextDocument in id)
{
Document document = context.Documents.Find(NextDocument);
if (document == null)
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
documents.Add(document);
}
var streamContent = new PushStreamContent((outputStream, httpContext, transportContent) =>
{
try
{
using (var zipFile = new ZipFile())
{
foreach (var d in documents)
{
var dt = d.DocumentDate.ToString("y").Replace('/', '-').Replace(':', '-');
string fileName = String.Format("{0}-{1}-{2}.pdf", dt, d.PipeName, d.LocationAb);
FileInfo fi = new FileInfo(d.DocumentUrl);
var fileReadStream = fi.OpenRead();
var fileSize = (int)fi.Length;
var fileContent = new byte[fileSize];
fileReadStream.Read(fileContent, 0, fileSize);
zipFile.AddEntry(fileName, fileContent);
}
zipFile.Save(outputStream); //Null Reference Exception
}
}
finally
{
outputStream.Close();
}
});
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
streamContent.Headers.ContentDisposition.FileName = "reports.zip";
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = streamContent
};
return response;
}
}
}
我正在尝试制作一个包含 pdf 的 zip 文件。当我解压缩 zip 时,pdf 已损坏。我在 'outputStream' 上放了一块表。这是第一个例外
'outputStream.Length' threw an exception of type 'System.NotSupportedException' long
这是整块手表
代码
[HttpPost]
[ActionName("ZipFileAction")]
public HttpResponseMessage ZipFiles([FromBody]int[] id)
{
if (id == null)
{//Required IDs were not provided
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.BadRequest));
}
List<Document> documents = new List<Document>();
using (var context = new ApplicationDbContext())
{
foreach (int NextDocument in id)
{
Document document = context.Documents.Find(NextDocument);
if (document == null)
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
documents.Add(document);
}
var streamContent = new PushStreamContent((outputStream, httpContext, transportContent) =>
{
try
{
using (var zipFile = new ZipFile())
{
foreach (var d in documents)
{
var dt = d.DocumentDate.ToString("y").Replace('/', '-').Replace(':', '-');
string fileName = String.Format("{0}-{1}-{2}.pdf", dt, d.PipeName, d.LocationAb);
zipFile.AddEntry(fileName, d.DocumentUrl);
}
zipFile.Save(outputStream); //Null Reference Exception
}
}
finally
{
outputStream.Close();
}
});
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
streamContent.Headers.ContentDisposition.FileName = "reports.zip";
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = streamContent
};
return response;
}
PushStreamContent
用于数据流。我认为您应该创建一个临时 zip 文件,并将其传递给 Response
.
例子
public FileResult ZipFiles(...)
{
// create a temporary file
return File("path/to/file.zip", System.Net.Mime.MediaTypeNames.Application.Octet);
}
问题原来是我没有在 pdf 中保存任何内容。我只是在保存 documentUrl。所以通过使用 FileInfo 来改变事情。工作代码
[HttpPost]
[ActionName("ZipFileAction")]
public HttpResponseMessage ZipFiles([FromBody]int[] id)
{
if (id == null)
{//Required IDs were not provided
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.BadRequest));
}
List<Document> documents = new List<Document>();
using (var context = new ApplicationDbContext())
{
foreach (int NextDocument in id)
{
Document document = context.Documents.Find(NextDocument);
if (document == null)
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
documents.Add(document);
}
var streamContent = new PushStreamContent((outputStream, httpContext, transportContent) =>
{
try
{
using (var zipFile = new ZipFile())
{
foreach (var d in documents)
{
var dt = d.DocumentDate.ToString("y").Replace('/', '-').Replace(':', '-');
string fileName = String.Format("{0}-{1}-{2}.pdf", dt, d.PipeName, d.LocationAb);
FileInfo fi = new FileInfo(d.DocumentUrl);
var fileReadStream = fi.OpenRead();
var fileSize = (int)fi.Length;
var fileContent = new byte[fileSize];
fileReadStream.Read(fileContent, 0, fileSize);
zipFile.AddEntry(fileName, fileContent);
}
zipFile.Save(outputStream); //Null Reference Exception
}
}
finally
{
outputStream.Close();
}
});
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
streamContent.Headers.ContentDisposition.FileName = "reports.zip";
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = streamContent
};
return response;
}
}
}