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using System.Net.Http.Headers;
using Microsoft.AspNetCore.Mvc;
namespace MxApiExtensions.Controllers;
[ApiController]
[Route("/")]
public class SyncController : ControllerBase {
private readonly ILogger<SyncController> _logger;
private readonly CacheConfiguration _config;
private readonly Auth _auth;
public SyncController(ILogger<SyncController> logger, CacheConfiguration config, Auth auth) {
_logger = logger;
_config = config;
_auth = auth;
}
[HttpGet("/_matrix/client/v3/sync")]
public async Task Sync([FromQuery] string? since, [FromQuery] string? access_token) {
try {
access_token ??= _auth.GetToken();
var mxid = _auth.GetUserId();
var cacheFile = GetFilePath(mxid, since);
if (!await TrySendCached(cacheFile)) {
using var hc = new HttpClient();
hc.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", access_token);
hc.Timeout = TimeSpan.FromMinutes(10);
//remove access_token from query string
Request.QueryString = new QueryString(
Request.QueryString.Value
.Replace("&access_token", "access_token")
.Replace($"access_token={access_token}", "")
);
var resp = hc.GetAsync($"{_config.Homeserver}{Request.Path}{Request.QueryString}").Result;
// var resp = await hs._httpClient.GetAsync($"/_matrix/client/v3/sync?since={since}");
if (resp.Content is null) {
throw new MatrixException {
ErrorCode = "M_UNKNOWN",
Error = "No content in response"
};
}
Response.StatusCode = (int)resp.StatusCode;
Response.ContentType = "application/json";
await Response.StartAsync();
await using var stream = await resp.Content.ReadAsStreamAsync();
await using var target = System.IO.File.OpenWrite(cacheFile);
var buffer = new byte[1];
int bytesRead;
while ((bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length)) > 0) {
await Response.Body.WriteAsync(buffer.AsMemory(0, bytesRead));
target.Write(buffer, 0, bytesRead);
}
await target.FlushAsync();
await Response.CompleteAsync();
}
}
catch (MatrixException e) {
Response.StatusCode = StatusCodes.Status500InternalServerError;
Response.ContentType = "application/json";
await Response.WriteAsJsonAsync(e.GetAsJson());
await Response.CompleteAsync();
}
catch (Exception e) {
Response.StatusCode = StatusCodes.Status500InternalServerError;
Response.ContentType = "text/plain";
await Response.WriteAsync(e.ToString());
await Response.CompleteAsync();
}
}
private async Task<bool> TrySendCached(string cacheFile) {
if (!System.IO.File.Exists(cacheFile)) return false;
Response.StatusCode = 200;
Response.ContentType = "application/json";
await Response.StartAsync();
await using var stream = System.IO.File.OpenRead(cacheFile);
await stream.CopyToAsync(Response.Body);
await Response.CompleteAsync();
return true;
}
#region Cache management
public string GetFilePath(string mxid, string since) {
var cacheDir = Path.Join("cache", mxid);
Directory.CreateDirectory(cacheDir);
var cacheFile = Path.Join(cacheDir, $"sync-{since}.json");
if (!Path.GetFullPath(cacheFile).StartsWith(Path.GetFullPath(cacheDir))) {
throw new MatrixException {
ErrorCode = "M_UNKNOWN",
Error = "[Rory&::MxSyncCache] Cache file path is not in cache directory"
};
}
return cacheFile;
}
#endregion
}
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