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global using BlobBin;
using System.Text;
using System.Text.Json;
using IOL.Helpers;
using File = BlobBin.File;
const long MAX_REQUEST_BODY_SIZE = 104_857_600;
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddDbContext<Eva>();
builder.Services.AddHostedService<WallE>();
builder.WebHost.UseKestrel(o => { o.Limits.MaxRequestBodySize = MAX_REQUEST_BODY_SIZE; });
var app = builder.Build();
app.UseFileServer();
app.UseStatusCodePages();
app.MapGet("/upload-link", GetFileUploadLink);
app.MapPost("/file/{id}", UploadFilePart);
app.MapPost("/file", UploadFile);
app.MapPost("/text", UploadText);
app.MapGet("/b/{id}/delete", DeleteUpload);
app.MapGet("/p/{id}/delete", DeleteUpload);
app.MapPost("/b/{id}", GetFile);
app.MapGet("/b/{id}", GetFile);
app.MapGet("/p/{id}", GetPaste);
app.MapPost("/p/{id}", GetPaste);
Tools.GetFilesDirectoryPath(true);
app.Run();
IResult DeleteUpload(HttpContext context, Eva db, string id, string key = default, bool confirmed = false) {
if (key.IsNullOrWhiteSpace()) {
return Results.BadRequest("No key was found");
}
var isPaste = context.Request.Path.StartsWithSegments("/p");
UploadEntityBase? upload = isPaste
? db.Pastes.FirstOrDefault(c => c.PublicId == id)
: db.Files.FirstOrDefault(c => c.PublicId == id);
if (upload is not {DeletedAt: null}) {
return Results.NotFound();
}
if (upload.DeletionKey != key) {
return Results.Text("Invalid key", default, default, 400);
}
if (!confirmed) {
return Results.Content($"""
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="/index.css">
<title>{upload.PublicId} - Confirm deletion - Blobbin</title>
</head>
<body>
<p>Are you sure you want to delete {upload.Name}?</p>
<a href="/{context.Request.Path.ToString()}&confirmed=true">Yes</a>
<span> </span>
<a href="/">No, cancel</a>
</body>
</html>
""", "text/html");
}
upload.DeletedAt = DateTime.UtcNow;
db.SaveChanges();
return Results.Text("""
The file is marked for deletion and cannot be accessed any more, all traces off it will be gone from our systems within 7 days.
""");
}
IResult GetFileUploadLink(HttpContext context, Eva db) {
var file = new File {
CreatedBy = context.Request.Headers["X-Forwarded-For"].ToString()
};
db.Files.Add(file);
db.SaveChanges();
return Results.Text(
context.Request.GetRequestHost()
+ "/upload/"
+ file.Id
);
}
async Task<IResult> UploadFile(HttpContext context, Eva db) {
if (!context.Request.Form.Files.Any()) {
return Results.BadRequest("No files was found in request");
}
var file = new File {
CreatedBy = context.Request.Headers["X-Forwarded-For"].ToString(),
Singleton = context.Request.Form["singleton"] == "on",
AutoDeleteAfter = context.Request.Form["autoDeleteAfter"],
Length = context.Request.Form.Files[0].Length,
Name = context.Request.Form.Files[0].FileName,
MimeType = context.Request.Form.Files[0].ContentType,
PublicId = GetUnusedPublicFileId(db),
DeletionKey = RandomString.Generate(6),
};
if (context.Request.Form["password"].ToString().HasValue()) {
file.PasswordHash = PasswordHelper.HashPassword(context.Request.Form["password"]);
}
await using var write = System.IO.File.OpenWrite(
Path.Combine(Tools.GetFilesDirectoryPath(), file.Id.ToString())
);
await context.Request.Form.Files[0].CopyToAsync(write);
db.Files.Add(file);
db.SaveChanges();
var deletionNote = "The file is only deleted when you request it.";
if (file.AutoDeleteAfter.HasValue()) {
var relativeDateTime = file.CreatedAt.Add(Tools.ParseHumanTimeSpan(file.AutoDeleteAfter));
deletionNote = $"The file will be automatically deleted at {relativeDateTime:u}";
}
return Results.Text($"""
Your file is available here: {context.Request.GetRequestHost()}/b/{file.PublicId}
To delete the file, open this url in a browser {context.Request.GetRequestHost()}/b/{file.PublicId}/delete?key={file.DeletionKey}.
{deletionNote}
""");
}
IResult UploadFilePart(HttpContext context, Eva db) {
return Results.Ok();
}
async Task<IResult> UploadText(HttpContext context, Eva db) {
if (context.Request.Form["content"].ToString().IsNullOrWhiteSpace()) {
return Results.Text("No content was found in request", default, default, 400);
}
var paste = new Paste {
CreatedBy = context.Request.Headers["X-Forwarded-For"].ToString(),
Singleton = context.Request.Form["singleton"] == "on",
AutoDeleteAfter = context.Request.Form["autoDeleteAfter"],
Length = context.Request.Form["content"].Count,
Name = context.Request.Form["name"],
MimeType = context.Request.Form["mime"],
PublicId = GetUnusedPublicPasteId(db),
Content = context.Request.Form["content"],
DeletionKey = RandomString.Generate(6),
};
if (paste.MimeType.IsNullOrWhiteSpace()) {
paste.MimeType = "text/plain";
}
if (context.Request.Form["password"].ToString().HasValue()) {
paste.PasswordHash = PasswordHelper.HashPassword(context.Request.Form["password"]);
}
db.Pastes.Add(paste);
db.SaveChanges();
var deletionNote = "The paste is only deleted when you request it.";
if (paste.AutoDeleteAfter.HasValue()) {
var relativeDateTime = paste.CreatedAt.Add(Tools.ParseHumanTimeSpan(paste.AutoDeleteAfter));
deletionNote = $"The paste will be automatically deleted at {relativeDateTime:u}";
}
return Results.Text($"""
Your paste is available here: {context.Request.GetRequestHost()}/p/{paste.PublicId}
To delete the paste, open this url in a browser {context.Request.GetRequestHost()}/p/{paste.PublicId}/delete?key={paste.DeletionKey}.
{deletionNote}
""");
}
async Task<IResult> GetPaste(HttpContext context, string id, Eva db) {
var paste = db.Pastes.FirstOrDefault(c => c.PublicId == id.Trim());
if (paste is not {DeletedAt: null}) return Results.NotFound();
if (paste.PasswordHash.HasValue()) {
var password = context.Request.Method == "POST" ? context.Request.Form["password"].ToString() : "";
if (password.IsNullOrWhiteSpace() || !PasswordHelper.Verify(password, paste.PasswordHash)) {
return Results.Content($"""
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="/index.css">
<title>{paste.PublicId} - Authenticate - Blobbin</title>
</head>
<body>
<form action="/p/{paste.PublicId}" method="post">
<p>Authenticate to access this paste:</p>
<input type="password" name="password" placeholder="Password">
<button type="submit">Unlock</button>
</form>
</body>
</html>
""", "text/html");
}
}
if (paste.Singleton) {
paste.DeletedAt = DateTime.UtcNow;
db.SaveChanges();
}
if (ShouldDeleteUpload(paste)) {
paste.DeletedAt = DateTime.UtcNow;
db.SaveChanges();
}
Console.WriteLine(JsonSerializer.Serialize(paste));
return Results.Content(paste.Content, paste.MimeType, Encoding.UTF8);
}
async Task<IResult> GetFile(HttpContext context, Eva db, string id, bool download = false) {
var file = db.Files.FirstOrDefault(c => c.PublicId == id.Trim());
if (file is not {DeletedAt: null}) return Results.NotFound();
if (file.PasswordHash.HasValue()) {
var password = context.Request.Method == "POST" ? context.Request.Form["password"].ToString() : "";
if (password.IsNullOrWhiteSpace() || !PasswordHelper.Verify(password, file.PasswordHash)) {
return Results.Content($"""
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="/index.css">
<title>{file.PublicId} - Authenticate - Blobbin</title>
</head>
<body>
<form action="/b/{file.PublicId}" method="post">
<p>Authenticate to access this file:</p>
<input type="password" name="password" placeholder="Password">
<button type="submit">Unlock</button>
</form>
</body>
</html>
""", "text/html");
}
}
if (file.Singleton) {
file.DeletedAt = DateTime.UtcNow;
db.SaveChanges();
}
if (ShouldDeleteUpload(file)) {
file.DeletedAt = DateTime.UtcNow;
db.SaveChanges();
}
var reader = await System.IO.File.ReadAllBytesAsync(
Path.Combine(
Tools.GetFilesDirectoryPath(), file.Id.ToString()
)
);
return download ? Results.File(reader, file.MimeType, file.Name) : Results.Bytes(reader, file.MimeType);
}
bool ShouldDeleteUpload(UploadEntityBase entity) {
if (entity.AutoDeleteAfter.IsNullOrWhiteSpace()) {
return false;
}
var deletedDateTime = entity.CreatedAt.Add(Tools.ParseHumanTimeSpan(entity.AutoDeleteAfter));
return DateTime.Compare(DateTime.UtcNow, deletedDateTime) > 0;
}
string GetUnusedPublicFileId(Eva db) {
string id() => RandomString.Generate(3);
var res = id();
while (db.Files.Any(c => c.PublicId == res)) {
res = id();
}
return res;
}
string GetUnusedPublicPasteId(Eva db) {
string id() => RandomString.Generate(3);
var res = id();
while (db.Pastes.Any(c => c.PublicId == res)) {
res = id();
}
return res;
}
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