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Files support for POST requests #107

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Files support for POST requests #107

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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ obj
*.suo
*.user
_ReSharper.*
*.ReSharper
*.DS_Store
*.userprefs
*.pidb
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4 changes: 2 additions & 2 deletions src/Main/Gate.Middleware/ShowExceptions.View.cs
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Expand Up @@ -353,7 +353,7 @@ unknown location
");

var form = request.ReadForm();
if (form.Any())
if (form.Fields.Any())
{
write(@"
<table class=""req"">
Expand All @@ -365,7 +365,7 @@ unknown location
</thead>
<tbody>
");
foreach (var kv in form.OrderBy(kv => kv.Key))
foreach (var kv in form.Fields.OrderBy(kv => kv.Key))
{
write(@"
<tr>
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127 changes: 127 additions & 0 deletions src/Main/Gate/Form/Form.cs
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@@ -0,0 +1,127 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using Gate.Utils;

namespace Gate.Form
{
internal class Form : IForm
{
readonly Encoding _encoding = new ASCIIEncoding();

public Form()
{
Fields = ParamDictionary.Parse("");
Files = new Dictionary<string, IFormFile>();
}

public Form(string text)
{
Fields = ParamDictionary.Parse(text);
Files = new Dictionary<string, IFormFile>();
}

public Form(string boundary, Stream stream)
{
Fields = new Dictionary<string, string>();
Files = new Dictionary<string, IFormFile>();
if (stream == null)
return;
if (stream.CanSeek)
stream.Seek(0, SeekOrigin.Begin);
ReadData(boundary, stream);
}

private static int IndexOf(byte[] searchIn, byte[] searchBytes, int start = 0)
{
var found = -1;
if (searchIn.Length > 0 && searchBytes.Length > 0 && start <= (searchIn.Length - searchBytes.Length) && searchIn.Length >= searchBytes.Length)
{
for (var i = start; i <= searchIn.Length - searchBytes.Length; i++)
{
if (searchIn[i] != searchBytes[0]) continue;
if (searchIn.Length > 1)
{
var matched = true;
for (var y = 1; y <= searchBytes.Length - 1; y++)
{
if (searchIn[i + y] == searchBytes[y]) continue;
matched = false;
break;
}
if (matched)
{
found = i;
break;
}
}
else
{
found = i;
break;
}
}
}
return found;
}

private static byte[] ReadFully(Stream input)
{
var buffer = new byte[16 * 1024];
using (var ms = new MemoryStream())
{
int read;
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
return ms.ToArray();
}
}

private static byte[] SubArray(byte[] data, int index, int length)
{
var result = new byte[length];
Array.Copy(data, index, result, 0, length);
return result;
}

private void ReadData(string boundary, Stream input)
{
var data = ReadFully(input);

var b = _encoding.GetBytes(boundary);
var ret1 = _encoding.GetBytes("\r\n--"+boundary);
var ret2 = _encoding.GetBytes("\r\n\r\n");

var offset = 0;
int pos;
while ((pos = IndexOf(data, b, offset)) != -1)
{
// pos - boundary starting point
if (pos + b.Length + 2 - data.Length > -5)
return;
// pos2 - boundary header endpoint/boundary body start point
var pos2 = IndexOf(data, ret2, pos + 1);
if (pos2 == -1)
return;
pos2 += ret2.Length;
// pos3 - boundary endpoint
var pos3 = IndexOf(data, ret1, pos2);
if (pos3 == -1)
return;
var file = new FormFile(SubArray(data, pos, pos2 - pos), SubArray(data, pos2, pos3 - pos2), _encoding);
if (file.IsFile)
Files[file.Name] = file;
else
Fields[file.Name] = file.FileName;
offset = pos3;
}
}

public IDictionary<string, string> Fields { get; private set; }

public IDictionary<string, IFormFile> Files { get; private set; }
}
}
60 changes: 60 additions & 0 deletions src/Main/Gate/Form/FormFile.cs
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@@ -0,0 +1,60 @@
using System;
using System.IO;
using System.Linq;
using System.Text;

namespace Gate.Form
{
internal class FormFile : IFormFile
{
readonly Stream _stream;

public FormFile(byte[] infob, byte[] content, Encoding encoding)
{
var info = encoding.GetString(infob);
ContentType = null;
Size = -1;
var parts = info.Split(new[] {";", "\r\n"}, StringSplitOptions.RemoveEmptyEntries);
foreach (var part in parts.Select(x => x.Trim()))
{
if (part.StartsWith("name=", StringComparison.OrdinalIgnoreCase))
{
Name = UnEscape(part.Substring(5));
}
else if (part.StartsWith("filename=", StringComparison.OrdinalIgnoreCase))
{
FileName = UnEscape(part.Substring(9));
Size = content.Length;
}
else if (part.StartsWith("Content-Type: ", StringComparison.OrdinalIgnoreCase))
{
ContentType = UnEscape(part.Substring(14));
}
}

_stream = ContentType != null ? new MemoryStream(content) : null;
if (ContentType == null)
FileName = encoding.GetString(content);
}

private static string UnEscape(string v)
{
return v.Trim(' ', '"');
}

public bool IsFile { get { return Stream != null; } }

public string Name { get; private set; }

public string FileName { get; private set; }

public string ContentType { get; private set; }

public long Size { get; private set; }

public Stream Stream
{
get { return _stream; }
}
}
}
4 changes: 4 additions & 0 deletions src/Main/Gate/Gate.csproj
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Expand Up @@ -48,7 +48,11 @@
<Compile Include="App_Packages\TaskHelpers.Sources.0.1\TaskHelpers.cs" />
<Compile Include="App_Packages\TaskHelpers.Sources.0.1\TaskHelpersExtensions.cs" />
<Compile Include="DictionaryExtensions.cs" />
<Compile Include="Form\FormFile.cs" />
<Compile Include="Form\Form.cs" />
<Compile Include="Headers.cs" />
<Compile Include="IForm.cs" />
<Compile Include="IFormFile.cs" />
<Compile Include="Mapping\MapBuilder.cs" />
<Compile Include="Mapping\UrlMapper.cs" />
<Compile Include="AppBuilderMapExtensions.cs" />
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10 changes: 10 additions & 0 deletions src/Main/Gate/IForm.cs
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@@ -0,0 +1,10 @@
using System.Collections.Generic;

namespace Gate
{
public interface IForm
{
IDictionary<string, string> Fields { get; }
IDictionary<string, IFormFile> Files { get; }
}
}
13 changes: 13 additions & 0 deletions src/Main/Gate/IFormFile.cs
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@@ -0,0 +1,13 @@
using System.IO;

namespace Gate
{
public interface IFormFile
{
string Name { get; }
string FileName { get; }
string ContentType { get; }
long Size { get; }
Stream Stream { get; }
}
}
70 changes: 54 additions & 16 deletions src/Main/Gate/Request.cs
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Expand Up @@ -2,11 +2,9 @@
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Gate.Utils;
using Owin;

namespace Gate
{
Expand Down Expand Up @@ -189,6 +187,14 @@ public bool HasParseableData
}
}

public bool HasBoundary
{
get
{
var ct = ContentType;
return ct != null && ContentType.IndexOf("boundary=", System.StringComparison.Ordinal) != -1;
}
}

public string ContentType
{
Expand All @@ -210,6 +216,22 @@ public string MediaType
}
}

public string Boundary
{
get
{
var contentType = ContentType;
if (contentType == null)
return null;
var idx = contentType.IndexOf("boundary=", System.StringComparison.Ordinal);
if (idx == -1)
return null;
var boundary = contentType.Substring(idx + "boundary=".Length);
var delimiterPos = boundary.IndexOfAny(CommaSemicolon);
return delimiterPos < 0 ? boundary : boundary.Substring(0, delimiterPos);
}
}

public Task CopyToStreamAsync(Stream stream)
{
if (Body == null)
Expand Down Expand Up @@ -291,14 +313,14 @@ public string ReadText()
return text;
}

public Task<IDictionary<string, string>> ReadFormAsync()
public Task<IForm> ReadFormAsync()
{
if (!HasFormData && !HasParseableData)
if (!HasFormData && !HasParseableData && !HasBoundary)
{
return TaskHelpers.FromResult(ParamDictionary.Parse(""));
return TaskHelpers.FromResult((IForm) new Form.Form());
}

var form = Environment.Get<IDictionary<string, string>>("Gate.Request.Form");
var form = Environment.Get<IForm>("Gate.Request.Form");
var thisInput = Body;
var lastInput = Environment.Get<object>("Gate.Request.Form#input");
if (form != null && ReferenceEquals(thisInput, lastInput))
Expand All @@ -308,32 +330,48 @@ public string ReadText()

Request thisRequest = this;

return ReadTextAsync().Then(text =>
var boundary = Boundary;
if (boundary == null)
return ReadTextAsync().Then(text =>
{
form = new Form.Form(text);
thisRequest.Environment.Set("Gate.Request.Form#input", thisInput);
thisRequest.Environment.Set("Gate.Request.Form", form);
return form;
});
return TaskHelpers.FromResult(form = new Form.Form(boundary, thisInput)).Then(x =>
{
form = ParamDictionary.Parse(text);
thisRequest.Environment.Set("Gate.Request.Form#input", thisInput);
thisRequest.Environment.Set("Gate.Request.Form", form);
return form;
thisRequest.Environment.Set("Gate.Request.Form", x);
return x;
});
}

public IDictionary<string, string> ReadForm()
public IForm ReadForm()
{
if (!HasFormData && !HasParseableData)
if (!HasFormData && !HasParseableData && !HasBoundary)
{
return ParamDictionary.Parse("");
return new Form.Form();
}

var form = Environment.Get<IDictionary<string, string>>("Gate.Request.Form");
var form = Environment.Get<IForm>("Gate.Request.Form");
var thisInput = Body;
var lastInput = Environment.Get<object>("Gate.Request.Form#input");
if (form != null && ReferenceEquals(thisInput, lastInput))
{
return form;
}

var text = ReadText();
form = ParamDictionary.Parse(text);
var boundary = Boundary;
if (boundary == null)
{
var text = ReadText();
form = new Form.Form(text);
}
else
{
form = new Form.Form(boundary, thisInput);
}
Environment.Set("Gate.Request.Form#input", thisInput);
Environment.Set("Gate.Request.Form", form);
return form;
Expand Down