Theodor-Springmann-Stiftung/hamann-ausgabe-core
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Formatted everything; completed upload capabilities

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schnulller
2022-06-04 02:42:01 +02:00
parent 743c88a4e5
commit 37b794ea05
61 changed files with 677 additions and 558 deletions
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39
HaWeb/FileHelpers/XMLFileHelpers.cs
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@@ -12,8 +12,7 @@ using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.WebUtilities;
using Microsoft.Net.Http.Headers;
public static class XMLFileHelpers
{
public static class XMLFileHelpers {
// File Signatures Database (https://www.filesignatures.net/)
private static readonly Dictionary<string, List<byte[]>> _fileSignature = new Dictionary<string, List<byte[]>>
{
@@ -33,9 +32,9 @@ public static class XMLFileHelpers
new byte[] { 0xFF, 0xD8, 0xFF, 0xE8 },
}
},
{ ".zip", new List<byte[]>
{ ".zip", new List<byte[]>
{
new byte[] { 0x50, 0x4B, 0x03, 0x04 },
new byte[] { 0x50, 0x4B, 0x03, 0x04 },
new byte[] { 0x50, 0x4B, 0x4C, 0x49, 0x54, 0x45 },
new byte[] { 0x50, 0x4B, 0x53, 0x70, 0x58 },
new byte[] { 0x50, 0x4B, 0x05, 0x06 },
@@ -90,7 +89,7 @@ public static class XMLFileHelpers
// return Array.Empty<byte>();
// }
// if (formFile.Length > sizeLimit)
// {
// var megabyteSizeLimit = sizeLimit / 1048576;
@@ -141,20 +140,16 @@ public static class XMLFileHelpers
// }
public static async Task<byte[]?> ProcessStreamedFile(
MultipartSection section, ContentDispositionHeaderValue contentDisposition,
ModelStateDictionary modelState, string[] permittedExtensions, long sizeLimit)
{
try
{
using (var memoryStream = new MemoryStream())
{
MultipartSection section, ContentDispositionHeaderValue contentDisposition,
ModelStateDictionary modelState, string[] permittedExtensions, long sizeLimit) {
try {
using (var memoryStream = new MemoryStream()) {
await section.Body.CopyToAsync(memoryStream);
// Check if the file is empty or exceeds the size limit.
if (memoryStream.Length == 0)
modelState.AddModelError("Error", "The file is empty.");
else if (memoryStream.Length > sizeLimit)
{
else if (memoryStream.Length > sizeLimit) {
var megabyteSizeLimit = sizeLimit / 1048576;
modelState.AddModelError("Error", $"The file exceeds {megabyteSizeLimit:N1} MB.");
}
@@ -164,21 +159,18 @@ public static class XMLFileHelpers
modelState.AddModelError("Error", "The file must be of the following specs:<br>" +
"1. The file must hava a .xml File-Extension<br>" +
"2. To make sure the file isn't executable the file must start with: <?xml version=\"1.0\" encoding=\"utf-8\"?> or <?xml version=\"1.0\"?>");
// Return the File as a byte array
else return memoryStream.ToArray();
}
}
catch (Exception ex)
{
} catch (Exception ex) {
modelState.AddModelError("Error", $"The upload failed. Error: {ex.Message}");
}
return null;
}
private static bool IsValidFileExtensionAndSignature(string fileName, Stream data, string[] permittedExtensions)
{
private static bool IsValidFileExtensionAndSignature(string fileName, Stream data, string[] permittedExtensions) {
if (string.IsNullOrEmpty(fileName) || data == null || data.Length == 0)
return false;
@@ -189,11 +181,10 @@ public static class XMLFileHelpers
data.Position = 0;
using (var reader = new BinaryReader(data))
{
using (var reader = new BinaryReader(data)) {
var signatures = _fileSignature[ext];
var headerBytes = reader.ReadBytes(signatures.Max(m => m.Length));
return signatures.Any(signature =>
return signatures.Any(signature =>
headerBytes.Take(signature.Length).SequenceEqual(signature));
}
}