╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ web.zig ──────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 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🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭e82eec6a..╮ e82eec6a.. haxy: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues patches new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (692) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig notify.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ui.zig ╭─────────────────────────────────╮ │web.zig │ ╰─────────────────────────────────╯
1221 allocator: std.mem.Allocator, 1222 base: []const u8, 1223 host: Host, 1224 revision: evt.Patch.MergeRevision, 1225 ) !void { 1226 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 1227 if (parts.thread_kind != .patch or parts.comment_id != null) return respondRemoveNotFound(request); 1228 const server = switch (host.event()) { 1229 .server => |server| server, 1230 .local => return respondRemoveNotFound(request), 1231 }; 1232 var author_arena = std.heap.ArenaAllocator.init(allocator); 1233 defer author_arena.deinit(); 1234 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .write, .patch)) orelse return).author; 1235 1236 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1237 defer request_repo.deinit(allocator); 1238 var target_repo = try rp.AnyRepo(.xit, .{}).open(io, allocator, request_repo.source.localInitOpts()); 1239 defer target_repo.deinit(io, allocator); 1240 1241 const id = std.fmt.bytesToHex(parts.thread_id, .lower); 1242 const merged = switch (target_repo) { 1243 inline else => |*repo| pch.mergeAndRemoveFork(repo.self_repo_opts, io, allocator, server, repo, .{ 1244 .id = id, 1245 .revision = revision, 1246 .author = author, 1247 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 1248 }), 1249 }; 1250 merged catch |err| switch (err) { 1251 error.MergeConflict => return request.respond("merge conflict", .{ 1252 .status = .conflict, 1253 .keep_alive = false, 1254 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1255 }), 1256 error.MergeCheckUnavailable, error.PatchOutOfDate, error.PatchDataUnavailable => {}, 1257 else => return err, 1258 }; 1259 1260 const location = try allocator.print("{s}/patch:{s}", .{ parts.repo_base, &id }); 1261 defer allocator.free(location); 1262 try request.respond("", .{ 1263 .status = .see_other, 1264 .keep_alive = false, 1265 .extra_headers = &.{.{ .name = "location", .value = location }}, 1266 }); 1267 } 1268 1269 // create a reply and redirect to its permalink. 1270 fn handleCommentNew( 1271 io: std.Io, 1272 request: *std.http.Server.Request, 1273 allocator: std.mem.Allocator, 1274 base: []const u8, 1275 host: Host, 1276 ) !void { 1277 const not_found = "comment parent not found"; 1278 const parts = commentBaseParts(host, base) orelse { 1279 try request.respond(not_found, .{ 1280 .status = .not_found, 1281 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1282 }); 1283 return; 1284 }; 1285 1286 var author_arena = std.heap.ArenaAllocator.init(allocator); 1287 defer author_arena.deinit(); 1288 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return).author; 1289 1290 const form_body = try readFormBody(request, allocator); 1291 defer allocator.free(form_body); 1292 const body_crlf = (try parseFormField(allocator, form_body, "body")) orelse try allocator.dupe(u8, ""); 1293 defer allocator.free(body_crlf); 1294 const body = try std.mem.replaceOwned(u8, allocator, body_crlf, "\r\n", "\n"); 1295 defer allocator.free(body); 1296 1297 if (!evt.Comment.fieldsValid(body)) { 1298 const form_location = try allocator.print("{s}/new", .{base}); 1299 defer allocator.free(form_location); 1300 try request.respond("", .{ 1301 .status = .see_other, 1302 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1303 }); 1304 return; 1305 } 1306 1307 const thread_id_hex = std.fmt.bytesToHex(parts.thread_id, .lower); 1308 const parent_id_hex = std.fmt.bytesToHex(parts.comment_id orelse parts.thread_id, .lower); 1309 1310 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse { 1311 try request.respond(not_found, .{ 1312 .status = .not_found, 1313 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1314 }); 1315 return; 1316 }; 1317 defer request_repo.deinit(allocator); 1318 const source = request_repo.source; 1319 var event_id_hex: [evt.event_id_size * 2]u8 = undefined; 1320 switch (source.repo_kind) { 1321 inline else => |repo_kind| { 1322 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1323 defer any_repo.deinit(io, allocator); 1324 switch (any_repo) { 1325 inline else => |*repo| event_id_hex = evt.Comment.create(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.thread_kind, &thread_id_hex, &parent_id_hex, body, author) catch |err| switch (err) { 1326 // the url's thread or parent comment isn't what it claims 1327 error.NotFound => return request.respond(not_found, .{ 1328 .status = .not_found, 1329 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1330 }), 1331 else => |e| return e, 1332 }, 1333 } 1334 }, 1335 } 1336 1337 const location = try allocator.print("{s}/{s}:{s}/comment:{s}", .{ parts.repo_base, @tagName(parts.thread_kind), &thread_id_hex, &event_id_hex }); 1338 defer allocator.free(location); 1339 try request.respond("", .{ 1340 .status = .see_other, 1341 .extra_headers = &.{.{ .name = "location", .value = location }}, 1342 }); 1343 } 1344 1345 const AttachmentRequest = struct { 1346 repo_base: []const u8, 1347 id: [evt.event_id_size]u8, 1348 }; 1349 1350 // an attachment url is its repo's base and the attachment's event id 1351 fn attachmentRequest(path: []const u8) ?AttachmentRequest { 1352 const infix = "/attachment:"; 1353 const at = std.mem.lastIndexOf(u8, path, infix) orelse return null; 1354 const tail = path[at + infix.len ..]; 1355 const id = evt.parseEventId(tail) catch return null; 1356 return .{ .repo_base = path[0..at], .id = id }; 1357 } 1358 1359 // serve an attachment's bytes from the repo its url names 1360 fn serveAttachment( 1361 io: std.Io, 1362 request: *std.http.Server.Request, 1363 allocator: std.mem.Allocator, 1364 attachment: AttachmentRequest, 1365 host: Host, 1366 ) !void { 1367 if (!try mayRead(io, allocator, request, host, attachment.repo_base)) return respondAttachmentNotFound(request); 1368 const request_repo = (try requestRepoSource(io, allocator, host, attachment.repo_base)) orelse return respondAttachmentNotFound(request); 1369 defer request_repo.deinit(allocator); 1370 const source = request_repo.source; 1371 switch (source.repo_kind) { 1372 inline else => |repo_kind| { 1373 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1374 defer any_repo.deinit(io, allocator); 1375 switch (any_repo) { 1376 inline else => |*repo| try sendAttachment(repo_kind, repo.self_repo_opts, io, request, allocator, repo, &attachment.id), 1377 } 1378 }, 1379 } 1380 } 1381 1382 fn sendAttachment( 1383 comptime repo_kind: rp.RepoKind, 1384 comptime repo_opts: rp.RepoOpts(repo_kind), 1385 io: std.Io, 1386 request: *std.http.Server.Request, 1387 allocator: std.mem.Allocator, 1388 repo: *rp.Repo(repo_kind, repo_opts), 1389 id: *const [evt.event_id_size]u8, 1390 ) !void { 1391 var arena = std.heap.ArenaAllocator.init(allocator); 1392 defer arena.deinit(); 1393 1394 const DB = evt.EventDB(repo_opts.hash); 1395 var event_db_maybe: ?evt.LocalEventDB(repo_opts.hash) = if (repo_kind == .git) try evt.LocalEventDB(repo_opts.hash).openReadOnly(io, allocator, repo.core.repo_dir) else null; 1396 defer if (event_db_maybe) |*event_db| event_db.deinit(io, allocator); 1397 const haxy_moment = (if (event_db_maybe) |*event_db| 1398 evt.currentMomentFromDb(repo_opts.hash, event_db.db) 1399 else if (repo_kind == .git) 1400 return respondAttachmentNotFound(request) 1401 else 1402 evt.currentMoment(repo_opts, repo)) catch return respondAttachmentNotFound(request); 1403 1404 const record = (try evt.Attachment.readById(DB, repo_opts.hash, haxy_moment, &arena, id)) orelse return respondAttachmentNotFound(request); 1405 if (record.removed) return respondAttachmentNotFound(request); 1406 if (record.blob_oid.len != hash.hexLen(repo_opts.hash)) return respondAttachmentNotFound(request); 1407 const blob_oid: *const [hash.hexLen(repo_opts.hash)]u8 = @ptrCast(record.blob_oid.ptr); 1408 1409 var moment = repo.core.latestMoment() catch return respondAttachmentNotFound(request); 1410 const state = rp.Repo(repo_kind, repo_opts).State(.read_only){ .core = &repo.core, .extra = .{ .moment = &moment } }; 1411 var object_reader = obj.ObjectReader(repo_kind, repo_opts).init(state, io, allocator, blob_oid) catch return respondAttachmentNotFound(request); 1412 defer object_reader.deinit(); 1413 if (object_reader.header().kind != .blob) return respondAttachmentNotFound(request); 1414 1415 const content_type = attachmentContentType(record.name); 1416 const encoded_name = try ui.urlEncodeRef(allocator, record.name); 1417 defer allocator.free(encoded_name); 1418 const disposition = try allocator.print("{s}; filename*=UTF-8''{s}", .{ if (content_type == null) "attachment" else "inline", encoded_name }); 1419 defer allocator.free(disposition); 1420 1421 var send_buf: [8192]u8 = undefined; 1422 var body = try request.respondStreaming(&send_buf, .{ 1423 .content_length = object_reader.header().size, 1424 .respond_options = .{ 1425 .extra_headers = &.{ 1426 .{ .name = "content-type", .value = content_type orelse "application/octet-stream" }, 1427 .{ .name = "content-disposition", .value = disposition }, 1428 // uploaded bytes are never sniffed into a type that could run 1429 // as script on this origin 1430 .{ .name = "x-content-type-options", .value = "nosniff" }, 1431 }, 1432 }, 1433 }); 1434 _ = try object_reader.interface.streamRemaining(&body.writer); 1435 try body.end(); 1436 } 1437 1438 // the images a browser renders safely inline. anything else downloads as 1439 // opaque bytes, so an uploaded page can't run on this origin. 1440 fn attachmentContentType(name: []const u8) ?[]const u8 { 1441 const types = [_]struct { ext: []const u8, value: []const u8 }{ 1442 .{ .ext = ".png", .value = "image/png" }, 1443 .{ .ext = ".jpg", .value = "image/jpeg" }, 1444 .{ .ext = ".jpeg", .value = "image/jpeg" }, 1445 .{ .ext = ".gif", .value = "image/gif" }, 1446 .{ .ext = ".webp", .value = "image/webp" }, 1447 }; 1448 for (types) |entry| { 1449 if (name.len > entry.ext.len and std.ascii.eqlIgnoreCase(name[name.len - entry.ext.len ..], entry.ext)) return entry.value; 1450 } 1451 return null; 1452 } 1453 1454 fn respondAttachmentNotFound(request: *std.http.Server.Request) !void { 1455 try request.respond("attachment not found", .{ 1456 .status = .not_found, 1457 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1458 }); 1459 } 1460 1461 fn respondAttachmentTargetNotFound(request: *std.http.Server.Request) !void { 1462 try request.respond("attachment target not found", .{ 1463 .status = .not_found, 1464 .keep_alive = false, 1465 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1466 }); 1467 } 1468 1469 // the upload declares its file's name here, since the body is the file itself 1470 const attachment_name_header = "x-attachment-name"; 1471 1472 const AttachTargetParts = struct { 1473 repo_base: []const u8, 1474 kind: evt.EventKind, 1475 id_bytes: [evt.event_id_size]u8, 1476 }; 1477 1478 // what an attachment hangs off: the `<kind>:<id>` segment the form's page ends 1479 // with, whatever kind that is 1480 fn attachTargetParts(base: []const u8) ?AttachTargetParts { 1481 const segment_at = std.mem.lastIndexOfScalar(u8, base, '/') orelse return null; 1482 const segment = base[segment_at + 1 ..]; 1483 const colon_at = std.mem.lastIndexOfScalar(u8, segment, ':') orelse return null; 1484 const kind = std.meta.stringToEnum(evt.EventKind, segment[0..colon_at]) orelse return null; 1485 const id_bytes = evt.parseEventId(segment[colon_at + 1 ..]) catch return null; 1486 return .{ .repo_base = base[0..segment_at], .kind = kind, .id_bytes = id_bytes }; 1487 } 1488 1489 // attach the uploaded file to the event the url names, then reload. the file is 1490 // the whole request body, so it streams from the socket into the object store 1491 // without being buffered. 1492 fn handleAttach( 1493 io: std.Io, 1494 request: *std.http.Server.Request, 1495 allocator: std.mem.Allocator, 1496 base: []const u8, 1497 host: Host, 1498 ) !void { 1499 const parts = attachTargetParts(base) orelse return respondAttachmentTargetNotFound(request); 1500 1501 var author_arena = std.heap.ArenaAllocator.init(allocator); 1502 defer author_arena.deinit(); 1503 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.kind)) orelse return; 1504 const author = actor.author; 1505 // an attachment changes the event it hangs off 1506 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondAttachmentTargetNotFound(request); 1507 defer request_repo.deinit(allocator); 1508 const source = request_repo.source; 1509 if (!try source.canModify(io, allocator, actor, parts.kind, &parts.id_bytes)) return respondForbidden(request); 1510 1511 const name = (try attachmentName(allocator, request)) orelse return respondUploadError(request, .bad_request, "attachment needs a name"); 1512 defer allocator.free(name); 1513 if (!evt.Attachment.nameValid(name)) return respondUploadError(request, .bad_request, "invalid attachment name"); 1514 1515 const size = request.head.content_length orelse return respondUploadError(request, .length_required, "attachments must declare a content length"); 1516 if (size == 0) return respondUploadError(request, .bad_request, "attachment is empty"); 1517 if (size > evt.Attachment.max_size) return respondUploadError(request, .payload_too_large, "attachment is too large"); 1518 1519 const target_id_hex = std.fmt.bytesToHex(parts.id_bytes, .lower); 1520 1521 var body_buf: [4096]u8 = undefined; 1522 const blob: evt.Blob = .{ .name = name, .size = size, .reader = try request.readerExpectContinue(&body_buf) }; 1523 1524 switch (source.repo_kind) { 1525 inline else => |repo_kind| { 1526 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1527 defer any_repo.deinit(io, allocator); 1528 switch (any_repo) { 1529 inline else => |*repo| _ = evt.Attachment.create(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.kind, &target_id_hex, blob, author) catch |err| switch (err) { 1530 error.TargetNotFound => return respondAttachmentTargetNotFound(request), 1531 else => return err, 1532 }, 1533 } 1534 }, 1535 } 1536 1537 // the client reloads the page itself 1538 try request.respond("", .{ .status = .no_content, .keep_alive = false }); 1539 } 1540 1541 // assign the posted email, or the email of the user it names, to the thread the 1542 // url names, then reload it 1543 fn handleAssign( 1544 io: std.Io, 1545 request: *std.http.Server.Request, 1546 allocator: std.mem.Allocator, 1547 base: []const u8, 1548 host: Host, 1549 ) !void { 1550 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 1551 if (parts.comment_id != null) return respondRemoveNotFound(request); 1552 1553 var arena = std.heap.ArenaAllocator.init(allocator); 1554 defer arena.deinit(); 1555 const actor = (try authorizeWrite(io, allocator, &arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 1556 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1557 defer request_repo.deinit(allocator); 1558 const source = request_repo.source; 1559 if (!try source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 1560 1561 const text = blk: { 1562 const body = try readFormBody(request, allocator); 1563 defer allocator.free(body); 1564 break :blk (try parseFormField(arena.allocator(), body, "assignee")) orelse ""; 1565 }; 1566 const failure: ?ui.Session.FormFeedback.AssignmentFailure = blk: { 1567 const lookup = switch (host) { 1568 .local => try ui.assigneeEmail(null, &arena, text), 1569 .server => |server| server: { 1570 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 1571 defer admin_repo.deinit(io, allocator); 1572 break :server try ui.assigneeEmail(try evt.currentMoment(evt.admin_repo_opts, &admin_repo), &arena, text); 1573 }, 1574 }; 1575 const email = switch (lookup) { 1576 .email => |email| email, 1577 .failure => |value| break :blk value, 1578 }; 1579 const thread_id_hex = std.fmt.bytesToHex(parts.thread_id, .lower); 1580 switch (source.repo_kind) { 1581 inline else => |repo_kind| { 1582 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1583 defer any_repo.deinit(io, allocator); 1584 switch (any_repo) { 1585 inline else => |*repo| _ = evt.Assignment.create(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.thread_kind, &thread_id_hex, email, actor.author) catch |err| switch (err) { 1586 error.AlreadyAssigned => break :blk .already_assigned, 1587 error.InvalidFields => break :blk .not_an_email, 1588 error.NotFound => return respondRemoveNotFound(request), 1589 else => |e| return e, 1590 }, 1591 } 1592 }, 1593 } 1594 break :blk null; 1595 }; 1596 if (failure) |value| return respondThreadFormFailure(request, allocator, host, base, .{ .assignment = .{ .failure = value, .text = text } }); 1597 try request.respond("", .{ .status = .see_other, .keep_alive = false, .extra_headers = &.{.{ .name = "location", .value = base }} }); 1598 } 1599 1600 // unassign the email the url's last segment carries from the thread before it, 1601 // then reload the thread 1602 fn handleUnassign( 1603 io: std.Io, 1604 request: *std.http.Server.Request, 1605 allocator: std.mem.Allocator, 1606 base: []const u8, 1607 host: Host, 1608 ) !void { 1609 const infix = "/assignee:"; 1610 const at = std.mem.lastIndexOf(u8, base, infix) orelse return respondRemoveNotFound(request); 1611 const thread_url = base[0..at]; 1612 const parts = commentBaseParts(host, thread_url) orelse return respondRemoveNotFound(request); 1613 if (parts.comment_id != null) return respondRemoveNotFound(request); 1614 1615 var arena = std.heap.ArenaAllocator.init(allocator); 1616 defer arena.deinit(); 1617 const email = std.Uri.percentDecodeInPlace(try arena.allocator().dupe(u8, base[at + infix.len ..])); 1618 const actor = (try authorizeWrite(io, allocator, &arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 1619 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1620 defer request_repo.deinit(allocator); 1621 const source = request_repo.source; 1622 if (!try source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 1623 1624 switch (source.repo_kind) { 1625 inline else => |repo_kind| { 1626 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1627 defer any_repo.deinit(io, allocator); 1628 switch (any_repo) { 1629 inline else => |*repo| evt.removeInThread(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.thread_kind, &parts.thread_id, .assign, &evt.Assignment.idOf(&parts.thread_id, email), actor.author) catch |err| switch (err) { 1630 error.EventNotFound => return respondRemoveNotFound(request), 1631 else => |e| return e, 1632 }, 1633 } 1634 }, 1635 } 1636 try request.respond("", .{ .status = .see_other, .keep_alive = false, .extra_headers = &.{.{ .name = "location", .value = thread_url }} }); 1637 } 1638 1639 // subscribe the logged-in user to the thread the url names, or mute it, then reload it 1640 fn handleNotify( 1641 io: std.Io, 1642 request: *std.http.Server.Request, 1643 allocator: std.mem.Allocator, 1644 base: []const u8, 1645 host: Host, 1646 users_dir: []const u8, 1647 mode: ui.NotifyAction, 1648 ) !void { 1649 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 1650 if (parts.comment_id != null) return respondRemoveNotFound(request); 1651 1652 var arena = std.heap.ArenaAllocator.init(allocator); 1653 defer arena.deinit(); 1654 const actor = (try authorizeWrite(io, allocator, &arena, request, host, parts.repo_base, .read, null)) orelse return; 1655 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1656 defer request_repo.deinit(allocator); 1657 // a server actor always has both ids 1658 const user_id = actor.user_id orelse unreachable; 1659 const location: evt.RepoLocation = .{ 1660 .owner_id = actor.repo_user_id orelse unreachable, 1661 .repo_id = evt.parseEventId(std.Io.Dir.path.basename(request_repo.source.path)) catch return respondRemoveNotFound(request), 1662 }; 1663 1664 switch (mode) { 1665 .subscribe => try notify.subscribe(io, allocator, users_dir, &user_id, location, &parts.thread_id, actor.author), 1666 .mute => try notify.mute(io, allocator, users_dir, &user_id, location, &parts.thread_id, actor.author), 1667 } 1668 try request.respond("", .{ .status = .see_other, .keep_alive = false, .extra_headers = &.{.{ .name = "location", .value = base }} }); 1669 } 1670 1671 // the name the upload declares for its file, percent-encoded so it survives a 1672 // header 1673 fn attachmentName(allocator: std.mem.Allocator, request: *std.http.Server.Request) !?[]u8 { 1674 var iter = request.iterateHeaders(); 1675 while (iter.next()) |header| { 1676 if (!std.ascii.eqlIgnoreCase(header.name, attachment_name_header)) continue; 1677 return try decodeFormValue(allocator, header.value); 1678 } 1679 return null; 1680 } 1681 1682 // an upload that failed leaves the body partly read, so the connection closes 1683 fn respondUploadError(request: *std.http.Server.Request, status: std.http.Status, message: []const u8) !void { 1684 try request.respond(message, .{ 1685 .status = status, 1686 .keep_alive = false, 1687 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1688 }); 1689 } 1690 1691 // re-emit the comment `parts` names with a new body, in the repo the host 1692 // resolves the base to. 1693 fn updateComment( 1694 io: std.Io, 1695 allocator: std.mem.Allocator, 1696 host: Host, 1697 parts: CommentBaseParts, 1698 body: []const u8, 1699 author: evt.CommitAuthor, 1700 ) !void { 1701 const comment_id = parts.comment_id orelse return error.NotFound; 1702 const thread_id = std.fmt.bytesToHex(parts.thread_id, .lower); 1703 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return error.NotFound; 1704 defer request_repo.deinit(allocator); 1705 const source = request_repo.source; 1706 switch (source.repo_kind) { 1707 inline else => |repo_kind| { 1708 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1709 defer any_repo.deinit(io, allocator); 1710 switch (any_repo) { 1711 inline else => |*repo| try evt.Comment.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.thread_kind, &thread_id, &comment_id, body, author), 1712 } 1713 }, 1714 } 1715 } 1716 1717 // edit actions share a suffix; the base identifies the event being edited. 1718 fn handleEdit( 1719 io: std.Io, 1720 request: *std.http.Server.Request, 1721 allocator: std.mem.Allocator, 1722 base: []const u8, 1723 host: Host, 1724 ) !void { 1725 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 1726 if (parts.comment_id != null) return handleCommentEdit(io, request, allocator, base, host, parts); 1727 return handleThreadEdit(io, request, allocator, base, host, parts); 1728 } 1729 1730 // replace the body of the comment the url names, then redirect to its 1731 // permalink. 1732 fn handleCommentEdit( 1733 io: std.Io, 1734 request: *std.http.Server.Request, 1735 allocator: std.mem.Allocator, 1736 base: []const u8, 1737 host: Host, 1738 parts: CommentBaseParts, 1739 ) !void { 1740 var author_arena = std.heap.ArenaAllocator.init(allocator); 1741 defer author_arena.deinit(); 1742 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 1743 const author = actor.author; 1744 // edits only reach here for a comment 1745 const comment_id = parts.comment_id orelse unreachable; 1746 { 1747 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1748 defer request_repo.deinit(allocator); 1749 if (!try request_repo.source.canModify(io, allocator, actor, .comment, &comment_id)) return respondForbidden(request); 1750 } 1751 1752 const form_body = try readFormBody(request, allocator); 1753 defer allocator.free(form_body); 1754 const body_crlf = (try parseFormField(allocator, form_body, "body")) orelse try allocator.dupe(u8, ""); 1755 defer allocator.free(body_crlf); 1756 const body = try std.mem.replaceOwned(u8, allocator, body_crlf, "\r\n", "\n"); 1757 defer allocator.free(body); 1758 1759 if (!evt.Comment.fieldsValid(body)) { 1760 const form_location = try allocator.print("{s}/edit", .{base}); 1761 defer allocator.free(form_location); 1762 try request.respond("", .{ 1763 .status = .see_other, 1764 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1765 }); 1766 return; 1767 } 1768 1769 const not_found = "comment not found"; 1770 updateComment(io, allocator, host, parts, body, author) catch |err| switch (err) { 1771 error.NotFound => { 1772 try request.respond(not_found, .{ 1773 .status = .not_found, 1774 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1775 }); 1776 return; 1777 }, 1778 else => |e| return e, 1779 }; 1780 1781 try request.respond("", .{ 1782 .status = .see_other, 1783 .extra_headers = &.{.{ .name = "location", .value = base }}, 1784 }); 1785 } 1786 1787 fn updateThread( 1788 comptime Event: type, 1789 io: std.Io, 1790 allocator: std.mem.Allocator, 1791 host: Host, 1792 repo_base: []const u8, 1793 id: *const [evt.event_id_size]u8, 1794 update: Event.Update, 1795 author: evt.CommitAuthor, 1796 ) !void { 1797 const request_repo = (try requestRepoSource(io, allocator, host, repo_base)) orelse return error.NotFound; 1798 defer request_repo.deinit(allocator); 1799 const source = request_repo.source; 1800 switch (source.repo_kind) { 1801 inline else => |repo_kind| { 1802 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1803 defer any_repo.deinit(io, allocator); 1804 switch (any_repo) { 1805 inline else => |*repo| try Event.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, id, update, author), 1806 } 1807 }, 1808 } 1809 } 1810 1811 const RemoveParts = struct { 1812 repo_base: []const u8, 1813 kind: evt.EventKind, 1814 // the thread the removed event is, or belongs to 1815 thread_kind: evt.EventKind, 1816 thread_id: [evt.event_id_size]u8, 1817 id: [evt.event_id_size]u8, 1818 }; 1819 1820 // split a remove url into the repo and event it names 1821 fn removeParts(host: Host, base: []const u8) ?RemoveParts { 1822 if (attachmentRequest(base)) |attachment| { 1823 const target = attachTargetParts(attachment.repo_base) orelse return null; 1824 return .{ 1825 .repo_base = target.repo_base, 1826 .kind = .attach, 1827 .thread_kind = target.kind, 1828 .thread_id = target.id_bytes, 1829 .id = attachment.id, 1830 }; 1831 } 1832 if (commentBaseParts(host, base)) |thread| return .{ 1833 .repo_base = thread.repo_base, 1834 .kind = if (thread.comment_id != null) .comment else thread.thread_kind, 1835 .thread_kind = thread.thread_kind, 1836 .thread_id = thread.thread_id, 1837 .id = thread.comment_id orelse thread.thread_id, 1838 }; 1839 return null; 1840 } 1841 1842 // remove the event named by the form's url 1843 fn handleRemove( 1844 io: std.Io, 1845 request: *std.http.Server.Request, 1846 allocator: std.mem.Allocator, 1847 base: []const u8, 1848 host: Host, 1849 ) !void { 1850 const parts = removeParts(host, base) orelse return respondRemoveNotFound(request); 1851 1852 var author_arena = std.heap.ArenaAllocator.init(allocator); 1853 defer author_arena.deinit(); 1854 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 1855 const author = actor.author; 1856 1857 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1858 defer request_repo.deinit(allocator); 1859 const source = request_repo.source; 1860 1861 if (parts.kind == .patch) switch (host) { 1862 .server => |server| { 1863 const user_id = actor.user_id orelse return respondLoginRequired(request); 1864 1865 // a draft lives in its author's user repo 1866 if (try evt.readForkById(io, allocator, &author_arena, server.users_dir, &user_id, &parts.id)) |fork_record| { 1867 const repo_id = evt.parseEventId(std.Io.Dir.path.basename(source.path)) catch return respondRemoveNotFound(request); 1868 if (!fork_record.removed and fork_record.event.stage == .draft and std.mem.eql(u8, &fork_record.event.repo_id, &std.fmt.bytesToHex(repo_id, .lower))) { 1869 const id = std.fmt.bytesToHex(parts.id, .lower); 1870 try fork.remove(io, allocator, server.users_dir, &user_id, &id, author); 1871 1872 const location = try allocator.print("{s}/patches/drafts", .{parts.repo_base}); 1873 defer allocator.free(location); 1874 try request.respond("", .{ 1875 .status = .see_other, 1876 .keep_alive = false, 1877 .extra_headers = &.{.{ .name = "location", .value = location }}, 1878 }); 1879 return; 1880 } 1881 } 1882 }, 1883 .local => {}, 1884 }; 1885 1886 // a draft is its author's alone, which its removal above checks 1887 if (!try source.canModify(io, allocator, actor, parts.kind, &parts.id)) return respondForbidden(request); 1888 1889 switch (source.repo_kind) { 1890 inline else => |repo_kind| { 1891 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1892 defer any_repo.deinit(io, allocator); 1893 switch (any_repo) { 1894 inline else => |*repo| evt.removeInThread(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, parts.thread_kind, &parts.thread_id, parts.kind, &parts.id, author) catch |err| switch (err) { 1895 error.EventNotFound => return respondRemoveNotFound(request), 1896 else => |e| return e, 1897 }, 1898 } 1899 }, 1900 } 1901 1902 const id = std.fmt.bytesToHex(parts.id, .lower); 1903 const location = try allocator.print("{s}/event:{s}/kind:{s}", .{ parts.repo_base, &id, @tagName(parts.kind) }); 1904 defer allocator.free(location); 1905 try request.respond("", .{ 1906 .status = .see_other, 1907 .keep_alive = false, 1908 .extra_headers = &.{.{ .name = "location", .value = location }}, 1909 }); 1910 } 1911 1912 fn respondRemoveNotFound(request: *std.http.Server.Request) !void { 1913 try request.respond("event not found", .{ 1914 .status = .not_found, 1915 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1916 }); 1917 } 1918 1919 fn updateDiscussion( 1920 io: std.Io, 1921 allocator: std.mem.Allocator, 1922 host: Host, 1923 repo_base: []const u8, 1924 id: *const [evt.event_id_size]u8, 1925 title: []const u8, 1926 labels: []const u8, 1927 description: []const u8, 1928 author: evt.CommitAuthor, 1929 ) !void { 1930 const request_repo = (try requestRepoSource(io, allocator, host, repo_base)) orelse return error.NotFound; 1931 defer request_repo.deinit(allocator); 1932 const source = request_repo.source; 1933 switch (source.repo_kind) { 1934 inline else => |repo_kind| { 1935 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1936 defer any_repo.deinit(io, allocator); 1937 switch (any_repo) { 1938 inline else => |*repo| try evt.Discussion.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, id, title, labels, description, author), 1939 } 1940 }, 1941 } 1942 } 1943 1944 // set the status of the issue the url names (base is 1945 // "/<owner>:<name>/issue:<id>", identity elided in local mode) by 1946 // re-emitting its event, then redirect back to it 1947 fn handleThreadStatus( 1948 io: std.Io, 1949 request: *std.http.Server.Request, 1950 allocator: std.mem.Allocator, 1951 base: []const u8, 1952 host: Host, 1953 open: bool, 1954 ) !void { 1955 const not_found = "thread not found"; 1956 const parts = commentBaseParts(host, base) orelse { 1957 try request.respond(not_found, .{ 1958 .status = .not_found, 1959 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1960 }); 1961 return; 1962 }; 1963 1964 var author_arena = std.heap.ArenaAllocator.init(allocator); 1965 defer author_arena.deinit(); 1966 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 1967 const author = actor.author; 1968 { 1969 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1970 defer request_repo.deinit(allocator); 1971 if (!try request_repo.source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 1972 } 1973 1974 (switch (parts.thread_kind) { 1975 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .status = if (open) .open else .closed }, author), 1976 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .status = if (open) .open else .closed }, author), 1977 else => return respondRemoveNotFound(request), 1978 }) catch |err| switch (err) { 1979 error.NotFound => { 1980 try request.respond(not_found, .{ 1981 .status = .not_found, 1982 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1983 }); 1984 return; 1985 }, 1986 else => |e| return e, 1987 }; 1988 1989 // like logout, this is a bodyless POST, so close the connection rather than 1990 // letting the keep-alive path try to discard a body that isn't framed. 1991 try request.respond("", .{ 1992 .status = .see_other, 1993 .keep_alive = false, 1994 .extra_headers = &.{.{ .name = "location", .value = base }}, 1995 }); 1996 } 1997 1998 // replace a thread's editable fields. 1999 fn handleThreadEdit( 2000 io: std.Io, 2001 request: *std.http.Server.Request, 2002 allocator: std.mem.Allocator, 2003 base: []const u8, 2004 host: Host, 2005 parts: CommentBaseParts, 2006 ) !void { 2007 var author_arena = std.heap.ArenaAllocator.init(allocator); 2008 defer author_arena.deinit(); 2009 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read, parts.thread_kind)) orelse return; 2010 const author = actor.author; 2011 2012 const body = try readFormBody(request, allocator); 2013 defer allocator.free(body); 2014 2015 const title = (try parseFormField(allocator, body, "title")) orelse try allocator.dupe(u8, ""); 2016 defer allocator.free(title); 2017 const labels = (try parseFormField(allocator, body, "labels")) orelse try allocator.dupe(u8, ""); 2018 defer allocator.free(labels); 2019 const description_crlf = (try parseFormField(allocator, body, "description")) orelse try allocator.dupe(u8, ""); 2020 defer allocator.free(description_crlf); 2021 // form submission normalizes textarea line breaks to CRLF; store plain 2022 // newlines so the text renders the same on every host 2023 const description = try std.mem.replaceOwned(u8, allocator, description_crlf, "\r\n", "\n"); 2024 defer allocator.free(description); 2025 const target_branch = (try parseFormField(allocator, body, "target_branch")) orelse try allocator.dupe(u8, ""); 2026 defer allocator.free(target_branch); 2027 2028 // invalid fields send the user back to the edit form 2029 const valid = switch (parts.thread_kind) { 2030 .issue => evt.Issue.fieldsValid(title, labels), 2031 .patch => evt.Patch.fieldsValid(title, labels), 2032 .discuss => evt.Discussion.fieldsValid(title, labels), 2033 else => unreachable, 2034 }; 2035 if (!valid) { 2036 const form_location = try allocator.print("{s}/edit", .{base}); 2037 defer allocator.free(form_location); 2038 if (!evt.titleValid(title)) { 2039 return respondThreadFormFailure(request, allocator, host, form_location, requiredTitleFeedback(parts.thread_kind, title, labels, description, target_branch, null)); 2040 } 2041 try request.respond("", .{ 2042 .status = .see_other, 2043 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 2044 }); 2045 return; 2046 } 2047 2048 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 2049 defer request_repo.deinit(allocator); 2050 2051 const draft_user_id = if (parts.thread_kind == .patch) actor.user_id else null; 2052 if (draft_user_id) |user_id| { 2053 const server = switch (host) { 2054 .server => |server| server, 2055 .local => unreachable, 2056 }; 2057 if (!evt.Patch.branchValid(target_branch) or !try request_repo.source.hasBranch(io, allocator, target_branch)) { 2058 const form_location = try allocator.print("{s}/edit", .{base}); 2059 defer allocator.free(form_location); 2060 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(.invalid_target_branch, title, labels, description, target_branch, null)); 2061 } 2062 const repo_id = evt.parseEventId(std.Io.Dir.path.basename(request_repo.source.path)) catch return respondRemoveNotFound(request); 2063 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 2064 defer admin_repo.deinit(io, allocator); 2065 const id = std.fmt.bytesToHex(parts.thread_id, .lower); 2066 if (try pch.editDraft(.{}, io, allocator, server.users_dir, &admin_repo, .{ 2067 .id = id, 2068 .user_id = user_id, 2069 .repo_id = repo_id, 2070 .title = title, 2071 .labels = labels, 2072 .description = description, 2073 .target_branch = target_branch, 2074 .author = author, 2075 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 2076 })) { 2077 try request.respond("", .{ 2078 .status = .see_other, 2079 .extra_headers = &.{.{ .name = "location", .value = base }}, 2080 }); 2081 return; 2082 } 2083 } 2084 2085 // a draft is its author's alone, which its edit above checks 2086 if (!try request_repo.source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 2087 2088 const not_found = switch (parts.thread_kind) { 2089 .issue => "issue not found", 2090 .patch => "patch not found", 2091 .discuss => "discussion not found", 2092 else => unreachable, 2093 }; 2094 (switch (parts.thread_kind) { 2095 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .fields = .{ 2096 .title = title, 2097 .labels = labels, 2098 .description = description, 2099 } }, author), 2100 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .fields = .{ 2101 .title = title, 2102 .labels = labels, 2103 .description = description, 2104 .target_branch = target_branch, 2105 } }, author), 2106 .discuss => updateDiscussion(io, allocator, host, parts.repo_base, &parts.thread_id, title, labels, description, author), 2107 else => unreachable, 2108 }) catch |err| switch (err) { 2109 error.NotFound => { 2110 try request.respond(not_found, .{ 2111 .status = .not_found, 2112 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2113 }); 2114 return; 2115 }, 2116 else => { 2117 if (parts.thread_kind != .patch) return err; 2118 const failure = ui.Session.FormFeedback.PatchFailure.fromError(err) orelse return err; 2119 const form_location = try allocator.print("{s}/edit", .{base}); 2120 defer allocator.free(form_location); 2121 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(failure, title, labels, description, target_branch, null)); 2122 }, 2123 }; 2124 2125 try request.respond("", .{ 2126 .status = .see_other, 2127 .extra_headers = &.{.{ .name = "location", .value = base }}, 2128 }); 2129 } 2130 2131 // resolve every conflicted field of the thread the url names 2132 fn handleThreadResolve( 2133 io: std.Io, 2134 request: *std.http.Server.Request, 2135 allocator: std.mem.Allocator, 2136 base: []const u8, 2137 host: Host, 2138 ) !void { 2139 const parts = commentBaseParts(host, base) orelse { 2140 try request.respond("thread not found", .{ 2141 .status = .not_found, 2142 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2143 }); 2144 return; 2145 }; 2146 2147 var author_arena = std.heap.ArenaAllocator.init(allocator); 2148 defer author_arena.deinit(); 2149 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .write, parts.thread_kind)) orelse return).author; 2150 2151 const body = try readFormBody(request, allocator); 2152 defer allocator.free(body); 2153 2154 var field_arena = std.heap.ArenaAllocator.init(allocator); 2155 defer field_arena.deinit(); 2156 const aa = field_arena.allocator(); 2157 const title = try parseFormField(aa, body, "title"); 2158 const labels = try parseFormField(aa, body, "labels"); 2159 2160 // the hunk inputs are submitted as d0, d1, ...; form submission normalizes their 2161 // textarea line breaks to CRLF 2162 var hunks: std.ArrayList([]const u8) = .empty; 2163 var hunk_index: usize = 0; 2164 while (true) : (hunk_index += 1) { 2165 const name = try aa.print("d{d}", .{hunk_index}); 2166 const submitted = (try parseFormField(aa, body, name)) orelse break; 2167 try hunks.append(aa, try std.mem.replaceOwned(u8, aa, submitted, "\r\n", "\n")); 2168 } 2169 2170 if (parts.comment_id != null or (parts.thread_kind != .issue and parts.thread_kind != .patch)) { 2171 try request.respond("thread not found", .{ 2172 .status = .not_found, 2173 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2174 }); 2175 return; 2176 } 2177 const route = routeFromUrl(host, base) orelse { 2178 try request.respond("thread not found", .{ 2179 .status = .not_found, 2180 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2181 }); 2182 return; 2183 }; 2184 const theirs: []const u8 = switch (route) { 2185 .repo_patches => |*patch| patch.theirs.slice(), 2186 .repo_issues => "", 2187 else => unreachable, 2188 }; 2189 const not_found = if (parts.thread_kind == .patch) "patch not found" else "issue not found"; 2190 2191 (switch (parts.thread_kind) { 2192 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .resolve = .{ 2193 .title = title, 2194 .labels = labels, 2195 .hunks = hunks.items, 2196 } }, author), 2197 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .resolve = .{ 2198 .title = title, 2199 .labels = labels, 2200 .hunks = hunks.items, 2201 .theirs = theirs, 2202 } }, author), 2203 else => unreachable, 2204 }) catch |err| switch (err) { 2205 error.NotFound => { 2206 try request.respond(not_found, .{ 2207 .status = .not_found, 2208 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2209 }); 2210 return; 2211 }, 2212 // invalid fields send the user back to the resolve form 2213 error.InvalidFields => { 2214 const form_location = try allocator.print("{s}/resolve", .{base}); 2215 defer allocator.free(form_location); 2216 try request.respond("", .{ 2217 .status = .see_other, 2218 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 2219 }); 2220 return; 2221 }, 2222 else => |e| return e, 2223 }; 2224 2225 try request.respond("", .{ 2226 .status = .see_other, 2227 .extra_headers = &.{.{ .name = "location", .value = base }}, 2228 }); 2229 } 2230 2231 // the posted path drops the action's own segment, so the route it parses is 2232 // the undo page the action applies to, never the confirmation page itself 2233 fn handleUndo(io: std.Io, request: *std.http.Server.Request, allocator: std.mem.Allocator, base: []const u8, host: Host, action: enum { undo, clear }) !void { 2234 const route = routeFromUrl(host, base) orelse return respondRepoNotFound(request); 2235 if (route != .repo_undo) return respondRepoNotFound(request); 2236 const target = route.repo_undo; 2237 var arena = std.heap.ArenaAllocator.init(allocator); 2238 defer arena.deinit(); 2239 const repo_base = if (target.name.len == 0) "" else try arena.allocator().print("/{s}", .{target.name.slice()}); 2240 _ = (try authorizeWrite(io, allocator, &arena, request, host, repo_base, .owner, null)) orelse return; 2241 const resolved = (try requestRepoSource(io, allocator, host, repo_base)) orelse return respondRepoNotFound(request); 2242 defer resolved.deinit(allocator); 2243 (switch (action) { 2244 .undo => ui.Repo.Undo.execute(io, allocator, resolved.source, target.index orelse return respondRepoNotFound(request)), 2245 .clear => ui.Repo.Undo.clearHistory(io, allocator, resolved.source), 2246 }) catch |err| switch (err) { 2247 error.NotFound, error.InvalidHistoryIndex, error.TransactionNotFound => return respondRepoNotFound(request), 2248 else => return err, 2249 }; 2250 const location = try (ui.RoutablePage.repoUndoRoute(target.name.slice(), null) orelse return error.RouteTooLong).toUrl(&arena); 2251 try request.respond("", .{ .status = .see_other, .keep_alive = false, .extra_headers = &.{.{ .name = "location", .value = location }} }); 2252 } 2253 2254 fn handleSync( 2255 io: std.Io, 2256 request: *std.http.Server.Request, 2257 allocator: std.mem.Allocator, 2258 base: []const u8, 2259 source: ui.RepoSource, 2260 ) !void { 2261 if (base.len != 0) { 2262 try request.respond("not found", .{ 2263 .status = .not_found, 2264 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 2265 }); 2266 return; 2267 } 2268 2269 var owned_failure: ?[]u8 = null; 2270 defer if (owned_failure) |message| allocator.free(message); 2271 const failure: ?[]const u8 = blk: { 2272 owned_failure = ui.Repo.Events.sync(io, allocator, source) catch |err| break :blk @errorName(err); 2273 break :blk owned_failure; 2274 }; 2275 if (failure) |message| { 2276 var encoded: std.Io.Writer.Allocating = .init(allocator); 2277 defer encoded.deinit(); 2278 try std.Uri.Component.percentEncode(&encoded.writer, message, struct { 2279 fn isUnreserved(c: u8) bool { 2280 return std.ascii.isAlphanumeric(c) or c == '-' or c == '.' or c == '_' or c == '~'; 2281 } 2282 }.isUnreserved); 2283 const cookie = try allocator.print( 2284 local_flash_cookie ++ "=" ++ local_sync_failure_prefix ++ "{s}; Path=/; HttpOnly; SameSite=Strict", 2285 .{encoded.written()}, 2286 ); 2287 defer allocator.free(cookie); 2288 try request.respond("", .{ 2289 .status = .see_other, 2290 .extra_headers = &.{ 2291 .{ .name = "location", .value = "/events" }, 2292 .{ .name = "set-cookie", .value = cookie }, 2293 }, 2294 }); 2295 return; 2296 } 2297 2298 try request.respond("", .{ 2299 .status = .see_other, 2300 .extra_headers = &.{ 2301 .{ .name = "location", .value = "/events" }, 2302 .{ .name = "set-cookie", .value = local_flash_cookie ++ "=; Path=/; Max-Age=0" }, 2303 }, 2304 }); 2305 } 2306 2307 fn renderIndexHtml( 2308 io: std.Io, 2309 allocator: std.mem.Allocator, 2310 host: Host, 2311 session_token: ?[]const u8, 2312 session_data: ui.Session.Data, 2313 ) ![]const u8 { 2314 const template = (findEmbed("/index.html") orelse return error.MissingIndexAsset).body; 2315 2316 var page_arena = std.heap.ArenaAllocator.init(allocator); 2317 defer page_arena.deinit(); 2318 2319 // the server admin repo must outlive the page build, since the session's 2320 // moment reads from it. 2321 var repo_maybe: ?rp.Repo(.xit, evt.admin_repo_opts) = null; 2322 defer if (repo_maybe) |*repo| repo.deinit(io, allocator); 2323 2324 var session = switch (host) { 2325 .server => |server| blk: { 2326 // open the admin repo to read live user/repo data. 2327 repo_maybe = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 2328 const repo = if (repo_maybe) |*repo| repo else unreachable; 2329 var session = try ui.Session.init(&page_arena, repo, session_data); 2330 // the session dropped a user whose account was removed, so revoke 2331 // the token that named them 2332 if (session_token) |token| { 2333 if (session.data.user_id == null) server.session_store.remove(token); 2334 } 2335 // give the page builders filesystem access to the on-disk repos (a 2336 // sibling "users" dir next to the admin repo) so the Repo page can 2337 // read its files. 2338 session.users_dir = server.users_dir; 2339 break :blk session; 2340 }, 2341 .local => |local| ui.Session{ 2342 .data = session_data, 2343 .arena = &page_arena, 2344 .page_arena = &page_arena, 2345 .local = local, 2346 }, 2347 }; 2348 session.io = io; 2349 session.data.now = std.math.cast(i64, std.Io.Timestamp.now(io, .real).toSeconds()) orelse return error.TimestampOutOfRange; 2350 2351 var page = try ui.Page.init(session.page_arena, &session, session.data.current_page); 2352 var root = try ui.initRoot(allocator, &page, &session); 2353 defer root.deinit(allocator); 2354 2355 const snapshot: ui.Snapshot = .{ .page = page, .session = session.data }; 2356 2357 const content = try generateHtml(allocator, &root, &session); 2358 defer allocator.free(content); 2359 2360 // serialize the snapshot so the wasm side can parse it back without making 2361 // a second request. it's embedded raw in a <script type="application/json"> 2362 // block, whose content is raw text terminated only by "</script". in json, 2363 // '<' appears solely inside string values, so escaping every '<' (and '>' 2364 // for good measure) to its \uXXXX form yields equivalent json that can't 2365 // break out of the tag. 2366 var json: std.Io.Writer.Allocating = .init(allocator); 2367 defer json.deinit(); 2368 try std.json.Stringify.value(snapshot, .{}, &json.writer); 2369 2370 var json_escaped: std.ArrayList(u8) = .empty; 2371 defer json_escaped.deinit(allocator); 2372 for (json.written()) |c| switch (c) { 2373 '<' => try json_escaped.appendSlice(allocator, "\\u003c"), 2374 '>' => try json_escaped.appendSlice(allocator, "\\u003e"), 2375 else => try json_escaped.append(allocator, c), 2376 }; 2377 2378 var out: std.ArrayList(u8) = .empty; 2379 errdefer out.deinit(allocator); 2380 { 2381 var cursor: usize = 0; 2382 for (&[_]struct { needle: []const u8, replacement: []const u8 }{ 2383 .{ .needle = "{{{ HAXY_HTML }}}", .replacement = content }, 2384 .{ .needle = "{{{ HAXY_JSON }}}", .replacement = json_escaped.items }, 2385 }) |sub| { 2386 const idx = std.mem.indexOfPos(u8, template, cursor, sub.needle) orelse return error.MissingTemplateToken; 2387 try out.appendSlice(allocator, template[cursor..idx]); 2388 try out.appendSlice(allocator, sub.replacement); 2389 cursor = idx + sub.needle.len; 2390 } 2391 try out.appendSlice(allocator, template[cursor..]); 2392 } 2393 return try out.toOwnedSlice(allocator); 2394 } 2395 2396 fn findEmbed(request_path: []const u8) ?Embed { 2397 // embeds are matched before pages, so a dot keeps them from claiming a username or tab 2398 comptime for (embeds) |embed| { 2399 if (std.mem.indexOfScalar(u8, embed.path, '.') == null) @compileError("embed path needs a '.' so it can't shadow a page: " ++ embed.path); 2400 }; 2401 if (request_path.len < 2 or request_path[0] != '/') return null; 2402 const path = request_path[1..]; 2403 2404 for (embeds) |embed| { 2405 if (std.mem.eql(u8, path, embed.path)) return embed; 2406 } 2407 return null; 2408 } 2409 2410 // emits the TUI grid cells as static HTML. each web-native Scroll becomes its 2411 // own absolutely-positioned, natively-scrollable <div> holding its full content, 2412 // rendered recursively so nested scrolls work. 2413 pub fn generateHtml(allocator: std.mem.Allocator, root: *ui.Widget, session: *ui.Session) ![]const u8 { 2414 const grid = root.getGrid() orelse return error.MissingGrid; 2415 const root_focus = root.getFocus(); 2416 2417 var out: std.ArrayList(u8) = .empty; 2418 errdefer out.deinit(allocator); 2419 2420 switch (root.*) { 2421 .background => |*background| { 2422 if (background.art.getGrid()) |art| { 2423 try out.print(allocator, "<div class=\"ansi-art\" aria-hidden=\"true\" style=\"left:{d}ch;opacity:{d}%\">", .{ grid.size.width -| art.size.width, ui.widget.AnsiBackground.art_opacity }); 2424 try renderPanel(allocator, &out, background.art.getFocus(), art, session, root_focus); 2425 try out.appendSlice(allocator, "</div>"); 2426 } 2427 }, 2428 else => {}, 2429 } 2430 try out.appendSlice(allocator, "<div class=\"grid-content\" data-key=\"panel:root\">"); 2431 try renderPanel(allocator, &out, root_focus, grid, session, root_focus); 2432 try out.appendSlice(allocator, "</div>"); 2433 try renderForms(allocator, &out, root_focus); 2434 return try out.toOwnedSlice(allocator); 2435 } 2436 2437 // render one panel — a focus subtree and its content grid — as HTML, recursing 2438 // once per web-native Scroll inside it. the root panel is the whole page; each 2439 // Scroll becomes a nested, natively-scrollable div holding its full content. 2440 // emits the panel's grid cells as text, leaving holes where child scrolls sit, 2441 // then the child scroll divs over those holes. 2442 fn renderPanel(allocator: std.mem.Allocator, output: *std.ArrayList(u8), focus: *Focus, grid: Grid, session: *ui.Session, root_focus: *Focus) !void { 2443 // `direct` is this panel's scroll children, each drawn as an overlaid div. 2444 // `excluded` is every focus id that belongs to a scroll (the scroll nodes 2445 // plus their descendants, which the focus tree flattens into this panel's 2446 // children): the cell hit-test below skips them so this panel doesn't claim 2447 // cells that are really rendered inside a child scroll's own panel. 2448 // (scrolls aren't nested in practice, so every scroll child is direct here.) 2449 var direct: std.ArrayList(usize) = .empty; 2450 defer direct.deinit(allocator); 2451 var excluded: std.AutoHashMapUnmanaged(usize, void) = .empty; 2452 defer excluded.deinit(allocator); 2453 { 2454 var it = focus.children.iterator(); 2455 while (it.next()) |e| { 2456 if (e.value_ptr.focus.scroll == null) continue; 2457 try direct.append(allocator, e.key_ptr.*); 2458 try excluded.put(allocator, e.key_ptr.*, {}); 2459 var mit = e.value_ptr.focus.children.iterator(); 2460 while (mit.next()) |m| try excluded.put(allocator, m.key_ptr.*, {}); 2461 } 2462 } 2463 2464 // the HTML element a run of cells is wrapped in, chosen from the cell's 2465 // focusable kind 2466 const CellTag = union(enum) { 2467 span, // clickable focusable cell 2468 a: []const u8, // clickable focusable link 2469 plain, // non-focusable, colored 2470 2471 const a_prefix = "a:"; 2472 // an "in-page" anchor: rendered as a real <a href> so it works with js 2473 // disabled, but wasm handles it without navigating. 2474 fn init(str: []const u8) @This() { 2475 if (std.mem.startsWith(u8, str, ui.raw_link_prefix)) { 2476 return .{ .a = str[ui.raw_link_prefix.len..] }; 2477 } 2478 if (std.mem.startsWith(u8, str, ui.in_page_link_prefix)) { 2479 return .{ .a = str[ui.in_page_link_prefix.len..] }; 2480 } 2481 if (std.mem.startsWith(u8, str, a_prefix)) { 2482 return .{ .a = str[a_prefix.len..] }; 2483 } 2484 return .span; 2485 } 2486 2487 fn writeOpenTag(self: @This(), alloc: std.mem.Allocator, out: *std.ArrayList(u8), id: usize, style_attr: []const u8) !void { 2488 var id_buf: [32]u8 = undefined; 2489 switch (self) { 2490 .span => { 2491 try out.appendSlice(alloc, "<span class=\"clickable\" data-focus-id=\""); 2492 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2493 try out.appendSlice(alloc, "\""); 2494 try out.appendSlice(alloc, style_attr); 2495 try out.appendSlice(alloc, ">"); 2496 }, 2497 .a => |href| { 2498 // tabindex=-1 keeps these out of the browser's tab order 2499 try out.appendSlice(alloc, "<a class=\"clickable\" tabindex=\"-1\" data-focus-id=\""); 2500 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2501 try out.appendSlice(alloc, "\" href=\""); 2502 try appendEscapedHtml(alloc, out, href); 2503 try out.appendSlice(alloc, "\""); 2504 try out.appendSlice(alloc, style_attr); 2505 try out.appendSlice(alloc, ">"); 2506 }, 2507 .plain => { 2508 try out.appendSlice(alloc, "<span"); 2509 try out.appendSlice(alloc, style_attr); 2510 try out.appendSlice(alloc, ">"); 2511 }, 2512 } 2513 } 2514 2515 fn closeTag(self: @This()) []const u8 { 2516 return switch (self) { 2517 .span, .plain => "</span>", 2518 .a => "</a>", 2519 }; 2520 } 2521 }; 2522 2523 // the focusable owning each cell, among this panel's own (skipping any 2524 // that belong to a child scroll, whose cells are drawn in their own panel). 2525 // claimed in focus order, so the first focusable over a cell keeps it. 2526 // looking every focusable up for every cell is quadratic in a long list. 2527 const owners = try allocator.alloc(?usize, grid.size.width * grid.size.height); 2528 defer allocator.free(owners); 2529 @memset(owners, null); 2530 { 2531 var it = focus.children.iterator(); 2532 while (it.next()) |entry| { 2533 const child = entry.value_ptr.*; 2534 if (child.focus.mode != .all) continue; 2535 if (excluded.contains(entry.key_ptr.*)) continue; 2536 const r = child.rect; 2537 for (@min(r.y, grid.size.height)..@min(r.y + r.size.height, grid.size.height)) |y| { 2538 for (@min(r.x, grid.size.width)..@min(r.x + r.size.width, grid.size.width)) |x| { 2539 const owner = &owners[y * grid.size.width + x]; 2540 if (owner.* == null) owner.* = entry.key_ptr.*; 2541 } 2542 } 2543 } 2544 } 2545 2546 // the cells are the volatile part of a panel. js replaces this one subtree 2547 // wholesale while retaining the panel's native controls and scroll shells. 2548 try output.appendSlice(allocator, "<div class=\"grid-cells\">"); 2549 2550 // emit this panel's grid as rows of text, coalescing adjacent cells that 2551 // share a focus id and style into one tag (a clickable span, a link, or a 2552 // plain styled span). cells under a child scroll keep only their background. 2553 // a cell's own link is an anchor nested in that tag. 2554 for (0..grid.size.height) |y| { 2555 var cur_id: ?usize = null; 2556 var cur_style: Grid.Style = .{}; 2557 var open_tag: ?CellTag = null; 2558 var open_link: ?[]const u8 = null; 2559 var first = true; 2560 for (0..grid.size.width) |x| { 2561 const cell = (try grid.cell(x, y)).*; 2562 // a cell covered by a child scroll's viewport is drawn by that scroll's 2563 // own div, so blank its glyph and make it non-clickable here — but keep 2564 // its background, so the backdrop still shows through the scroll's 2565 // transparent div instead of a bare hole. 2566 const covered_by_scroll = blk: { 2567 for (direct.items) |id| { 2568 const r = (focus.children.get(id) orelse continue).rect; 2569 if (x >= r.x and y >= r.y and x < r.x + r.size.width and y < r.y + r.size.height) break :blk true; 2570 } 2571 break :blk false; 2572 }; 2573 // the focusable owning the cell at (x, y); none for a covered cell. 2574 const cell_id = if (covered_by_scroll) null else owners[y * grid.size.width + x]; 2575 const style: Grid.Style = if (covered_by_scroll) .{ .bg = cell.style.bg } else cell.style; 2576 2577 if (first or cell_id != cur_id or !style.eql(cur_style)) { 2578 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2579 open_link = null; 2580 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2581 2582 var new_tag: ?CellTag = null; 2583 if (cell_id) |id| { 2584 if (focus.children.get(id)) |child| { 2585 new_tag = switch (child.focus.kind) { 2586 .custom => |custom| CellTag.init(custom), 2587 else => .span, 2588 }; 2589 } 2590 } 2591 if (new_tag == null and !style.eql(.{})) new_tag = .plain; 2592 2593 if (new_tag) |t| { 2594 var style_buf: [192]u8 = undefined; 2595 try t.writeOpenTag(allocator, output, cell_id orelse 0, styleAttr(&style_buf, style)); 2596 } 2597 2598 open_tag = new_tag; 2599 cur_id = cell_id; 2600 cur_style = style; 2601 first = false; 2602 } 2603 2604 // an anchor can't nest in another, so a link tag's cells skip theirs 2605 const in_anchor = if (open_tag) |t| t == .a else false; 2606 const link = if (covered_by_scroll or in_anchor) null else webLink(cell.link); 2607 if (!sameLink(link, open_link)) { 2608 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2609 if (link) |url| { 2610 // a page path opens in this tab, any other url in a new one 2611 try output.appendSlice(allocator, if (url[0] == '/') 2612 "<a class=\"cell-link\" tabindex=\"-1\" href=\"" 2613 else 2614 "<a class=\"cell-link\" tabindex=\"-1\" target=\"_blank\" rel=\"noopener noreferrer\" href=\""); 2615 try appendEscapedHtml(allocator, output, url); 2616 try output.appendSlice(allocator, "\">"); 2617 } 2618 open_link = link; 2619 } 2620 2621 if (covered_by_scroll) { 2622 try appendEscapedHtml(allocator, output, " "); 2623 } else if (cell.continuation) { 2624 // the wide rune to the left was emitted 2ch wide, covering this column 2625 } else if (cell.rune) |rune| { 2626 var encoded: [4]u8 = undefined; 2627 const encoded_len = try std.unicode.utf8Encode(rune, &encoded); 2628 const rune_text = encoded[0..encoded_len]; 2629 // a double-width rune is pinned inside a 2ch span so the 2630 // fallback glyph's advance width can't shift the rest of the row 2631 const wide = x + 1 < grid.size.width and (try grid.cell(x + 1, y)).continuation; 2632 if (wide) { 2633 try output.appendSlice(allocator, "<span class=\"w2\">"); 2634 try appendEscapedHtml(allocator, output, rune_text); 2635 try output.appendSlice(allocator, "</span>"); 2636 } else { 2637 try appendEscapedHtml(allocator, output, rune_text); 2638 } 2639 } else { 2640 try appendEscapedHtml(allocator, output, " "); 2641 } 2642 } 2643 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2644 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2645 try output.append(allocator, '\n'); 2646 } 2647 try output.appendSlice(allocator, "</div>"); 2648 2649 // native controls live in their panel, beside the replaceable cells. their 2650 // stable keys let JS update layout without recreating their DOM nodes, and 2651 // being actual descendants of a scroll gives them native movement/clipping. 2652 try renderPanelControls(allocator, output, focus, session, root_focus, &excluded); 2653 2654 // each child scroll becomes a natively-scrollable div positioned over its 2655 // viewport, holding its full content rendered recursively. 2656 for (direct.items) |id| { 2657 const child = focus.children.get(id) orelse continue; 2658 const info = child.focus.scroll orelse continue; 2659 const r = child.rect; 2660 // overflow only on the axes the widget scrolls; `auto` shows a bar only 2661 // when that axis actually overflows. the other axis is clipped (hidden), 2662 // matching how the terminal Scroll handles its non-scrolling axis. 2663 const overflow = switch (info.direction) { 2664 .vert => "overflow-x:hidden;overflow-y:auto", 2665 .horiz => "overflow-x:auto;overflow-y:hidden", 2666 .both => "overflow:auto", 2667 }; 2668 // the id carries a content version so JS preserves the native scroll 2669 // position across re-renders of the same content but resets it when the 2670 // content is replaced — e.g. selecting a different commit. the widget's 2671 // scroll offset (in cells) rides along so JS can apply it when it has no 2672 // preserved position, letting a wasm-side scrollToRect (the files list 2673 // scrolling to its selected row on page load) reach the browser. 2674 var buf: [256]u8 = undefined; 2675 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, "<div class=\"scroll\" data-key=\"scroll:{d}\" data-scroll-id=\"{d}-{d}\" data-scroll-direction=\"{s}\" data-scroll-x=\"{d}\" data-scroll-y=\"{d}\" style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em;{s}\">", .{ id, id, child.focus.version, @tagName(info.direction), info.offset_x, info.offset_y, r.x, r.y, r.size.width, r.size.height, overflow })); 2676 try renderPanel(allocator, output, child.focus, info.content, session, root_focus); 2677 try output.appendSlice(allocator, "</div>"); 2678 } 2679 } 2680 2681 const form_prefix = "form:"; 2682 const form_id_prefix = "haxy-form-"; 2683 2684 fn formAction(focus: *const Focus) ?[]const u8 { 2685 return switch (focus.kind) { 2686 .custom => |custom| if (std.mem.startsWith(u8, custom, form_prefix)) custom[form_prefix.len..] else null, 2687 else => null, 2688 }; 2689 } 2690 2691 // find the form ancestor of a flattened focus-tree child. html's `form` 2692 // attribute then associates the control with that form without requiring the 2693 // form and control to share a DOM parent. 2694 fn formOwner(root_focus: *Focus, focus_id: usize) ?usize { 2695 var id = focus_id; 2696 while (root_focus.children.get(id)) |child| { 2697 const parent_id = child.parent_id; 2698 if (parent_id == root_focus.id) return if (formAction(root_focus) != null) root_focus.id else null; 2699 const parent = root_focus.children.get(parent_id) orelse return null; 2700 if (formAction(parent.focus) != null) return parent_id; 2701 id = parent_id; 2702 } 2703 return null; 2704 } 2705 2706 fn appendFormAttribute(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus, focus_id: usize) !void { 2707 const form_id = formOwner(root_focus, focus_id) orelse return; 2708 var buf: [64]u8 = undefined; 2709 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, " form=\"" ++ form_id_prefix ++ "{d}\"", .{form_id})); 2710 } 2711 2712 fn renderPanelControls( 2713 allocator: std.mem.Allocator, 2714 output: *std.ArrayList(u8), 2715 focus: *Focus, 2716 session: *ui.Session, 2717 root_focus: *Focus, 2718 excluded: *const std.AutoHashMapUnmanaged(usize, void), 2719 ) !void { 2720 var iter = focus.children.iterator(); 2721 while (iter.next()) |entry| { 2722 const id = entry.key_ptr.*; 2723 if (excluded.contains(id)) continue; 2724 const child = entry.value_ptr.*; 2725 const r = child.rect; 2726 2727 if (r.size.width == 0 or r.size.height == 0) continue; // not laid out, rather than merely off-screen 2728 2729 switch (child.focus.kind) { 2730 .text_input, .text_input_password, .text_area => { 2731 const ti = session.text_inputs.get(id) orelse continue; 2732 2733 const inner_left = r.x + 1; 2734 const inner_top = r.y + 1; 2735 const inner_width = if (r.size.width > 2) r.size.width - 2 else 0; 2736 const preserve = !ti.options.read_only; 2737 2738 if (child.focus.kind == .text_area) { 2739 const value = try ti.text(allocator); 2740 defer allocator.free(value); 2741 var id_buf: [128]u8 = undefined; 2742 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<textarea data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2743 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2744 try appendFormAttribute(allocator, output, root_focus, id); 2745 if (ti.options.name.len > 0) { 2746 try output.appendSlice(allocator, " name=\""); 2747 try appendEscapedHtml(allocator, output, ti.options.name); 2748 try output.append(allocator, '"'); 2749 } 2750 const inner_height = if (r.size.height > 2) r.size.height - 2 else 0; 2751 var pos_buf: [128]u8 = undefined; 2752 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">\n", .{ inner_left, inner_top, inner_width, inner_height })); 2753 try appendEscapedHtml(allocator, output, value); 2754 try output.appendSlice(allocator, "</textarea>"); 2755 continue; 2756 } 2757 2758 var id_buf: [160]u8 = undefined; 2759 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"{s}\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ if (child.focus.kind == .text_input_password) "password" else "text", id, id })); 2760 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2761 try appendFormAttribute(allocator, output, root_focus, id); 2762 if (ti.options.name.len > 0) { 2763 try output.appendSlice(allocator, " name=\""); 2764 try appendEscapedHtml(allocator, output, ti.options.name); 2765 try output.append(allocator, '"'); 2766 } 2767 if (child.focus.kind != .text_input_password) { 2768 const value = try ti.text(allocator); 2769 defer allocator.free(value); 2770 try output.appendSlice(allocator, " value=\""); 2771 try appendEscapedHtml(allocator, output, value); 2772 try output.append(allocator, '"'); 2773 } 2774 var pos_buf: [96]u8 = undefined; 2775 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:1em\">", .{ inner_left, inner_top, inner_width })); 2776 }, 2777 .custom => |custom| { 2778 if (std.mem.eql(u8, custom, "submit") or std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2779 if (formOwner(root_focus, id) == null) continue; 2780 var id_buf: [128]u8 = undefined; 2781 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<button type=\"submit\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2782 try appendFormAttribute(allocator, output, root_focus, id); 2783 if (std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2784 try output.appendSlice(allocator, " formaction=\""); 2785 try appendEscapedHtml(allocator, output, custom[ui.submit_action_prefix.len..]); 2786 try output.append(allocator, '"'); 2787 } 2788 var pos_buf: [128]u8 = undefined; 2789 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\"></button>", .{ r.x, r.y, r.size.width, r.size.height })); 2790 } else if (std.mem.startsWith(u8, custom, ui.radio_prefix)) { 2791 // an invisible native radio over the option, checked when the option is its row's selection 2792 const field = custom[ui.radio_prefix.len..]; 2793 const separator = std.mem.indexOfScalar(u8, field, '=') orelse continue; 2794 const row = root_focus.children.get(child.parent_id) orelse continue; 2795 var id_buf: [128]u8 = undefined; 2796 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"radio\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2797 try appendFormAttribute(allocator, output, root_focus, id); 2798 try output.appendSlice(allocator, " name=\""); 2799 try appendEscapedHtml(allocator, output, field[0..separator]); 2800 try output.appendSlice(allocator, "\" value=\""); 2801 try appendEscapedHtml(allocator, output, field[separator + 1 ..]); 2802 try output.append(allocator, '"'); 2803 if (row.focus.child_id == id) try output.appendSlice(allocator, " checked"); 2804 var pos_buf: [128]u8 = undefined; 2805 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ r.x, r.y, r.size.width, r.size.height })); 2806 } else if (std.mem.startsWith(u8, custom, ui.file_input_prefix)) { 2807 try output.appendSlice(allocator, "<input type=\"file\" data-preserve-value data-action=\""); 2808 try appendEscapedHtml(allocator, output, custom[ui.file_input_prefix.len..]); 2809 var id_buf: [128]u8 = undefined; 2810 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "\" data-key=\"control:{d}\" data-focus-id=\"{d}\" style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ id, id, r.x, r.y, r.size.width, r.size.height })); 2811 } 2812 }, 2813 else => {}, 2814 } 2815 } 2816 } 2817 2818 // emit hidden form owners beside the rendered panels. their controls point 2819 // back here with the standard HTML `form` attribute. 2820 fn renderForms(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus) !void { 2821 // the focus child map preserves insertion order, which matches the order 2822 // widgets were added in code 2823 var iter = root_focus.children.iterator(); 2824 while (iter.next()) |entry| { 2825 const child = entry.value_ptr.*; 2826 const action_url = formAction(child.focus) orelse continue; 2827 2828 try output.appendSlice(allocator, "<form hidden data-key=\"form:"); 2829 var id_buf: [96]u8 = undefined; 2830 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "{d}\" id=\"" ++ form_id_prefix ++ "{d}\" action=\"", .{ entry.key_ptr.*, entry.key_ptr.* })); 2831 try appendEscapedHtml(allocator, output, action_url); 2832 try output.appendSlice(allocator, "\" method=\"post\"></form>"); 2833 } 2834 } 2835 2836 // the 16 ansi colors as the browser shows them (xterm's defaults) 2837 const ansi_palette = [16]Grid.Color.Rgb{ 2838 .{ .r = 0x00, .g = 0x00, .b = 0x00 }, .{ .r = 0xcd, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xcd, .b = 0x00 }, .{ .r = 0xcd, .g = 0xcd, .b = 0x00 }, 2839 .{ .r = 0x00, .g = 0x00, .b = 0xee }, .{ .r = 0xcd, .g = 0x00, .b = 0xcd }, .{ .r = 0x00, .g = 0xcd, .b = 0xcd }, .{ .r = 0xe5, .g = 0xe5, .b = 0xe5 }, 2840 .{ .r = 0x7f, .g = 0x7f, .b = 0x7f }, .{ .r = 0xff, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xff, .b = 0x00 }, .{ .r = 0xff, .g = 0xff, .b = 0x00 }, 2841 .{ .r = 0x5c, .g = 0x5c, .b = 0xff }, .{ .r = 0xff, .g = 0x00, .b = 0xff }, .{ .r = 0x00, .g = 0xff, .b = 0xff }, .{ .r = 0xff, .g = 0xff, .b = 0xff }, 2842 }; 2843 2844 // resolve any color to rgb: palette colors through the ansi table and the 2845 // xterm 256-color layout (16 ansi, a 6x6x6 cube, then 24 grays) 2846 fn colorRgb(color: Grid.Color) Grid.Color.Rgb { 2847 return switch (color) { 2848 .rgb => |c| c, 2849 .ansi => |a| ansi_palette[@backingInt(a)], 2850 .indexed => |n| if (n < 16) 2851 ansi_palette[n] 2852 else if (n < 232) blk: { 2853 const levels = [6]u8{ 0, 0x5f, 0x87, 0xaf, 0xd7, 0xff }; 2854 const i = n - 16; 2855 break :blk .{ .r = levels[i / 36], .g = levels[(i / 6) % 6], .b = levels[i % 6] }; 2856 } else blk: { 2857 const v: u8 = 8 + (n - 232) * 10; 2858 break :blk .{ .r = v, .g = v, .b = v }; 2859 }, 2860 }; 2861 } 2862 2863 // builds an HTML ` style="color:…;background-color:…"` attribute from a 2864 // cell's style into `buf`, omitting whichever color is unset. an inverted 2865 // cell swaps the two, falling back to the page's --fg/--bg variables for 2866 // whichever side is unset. text attributes follow the colors. returns an 2867 // empty slice when nothing is set. 2868 fn styleAttr(buf: []u8, style: Grid.Style) []const u8 { 2869 if (style.eql(.{})) return buf[0..0]; 2870 const prefix = " style=\""; 2871 @memcpy(buf[0..prefix.len], prefix); 2872 var i: usize = prefix.len; 2873 const inverted = style.inverted; 2874 i = cssColor(buf, i, "color", if (inverted) style.bg else style.fg, if (inverted) "var(--bg)" else null) orelse return buf[0..0]; 2875 i = cssColor(buf, i, "background-color", if (inverted) style.fg else style.bg, if (inverted) "var(--fg)" else null) orelse return buf[0..0]; 2876 const decoration: []const u8 = if (style.underline and style.strikethrough) 2877 "text-decoration:underline line-through;" 2878 else if (style.underline) 2879 "text-decoration:underline;" 2880 else if (style.strikethrough) 2881 "text-decoration:line-through;" 2882 else 2883 ""; 2884 const attributes = std.fmt.bufPrint(buf[i..], "{s}{s}{s}{s}", .{ 2885 if (style.bold) "font-weight:bold;" else "", 2886 if (style.italic) "font-style:italic;" else "", 2887 decoration, 2888 if (style.dim) "opacity:.6;" else "", 2889 }) catch return buf[0..0]; 2890 i += attributes.len; 2891 if (i >= buf.len) return buf[0..0]; 2892 buf[i] = '"'; 2893 return buf[0 .. i + 1]; 2894 } 2895 2896 // append `prop:value;` at buf[i..] for the color, or for the fallback when 2897 // the color is unset (nothing when both are). returns the new end, or null 2898 // when it doesn't fit. 2899 fn cssColor(buf: []u8, i: usize, prop: []const u8, color: ?Grid.Color, fallback: ?[]const u8) ?usize { 2900 const s = if (color) |c| blk: { 2901 const v = colorRgb(c); 2902 break :blk std.fmt.bufPrint(buf[i..], "{s}:#{x:0>2}{x:0>2}{x:0>2};", .{ prop, v.r, v.g, v.b }) catch return null; 2903 } else if (fallback) |f| 2904 std.fmt.bufPrint(buf[i..], "{s}:{s};", .{ prop, f }) catch return null 2905 else 2906 return i; 2907 return i + s.len; 2908 } 2909 2910 // a cell's link as an href, when it's a page path or a web or mail url 2911 fn webLink(link: ?[]const u8) ?[]const u8 { 2912 const url = link orelse return null; 2913 // a page path, not a protocol-relative url 2914 if (url.len > 1 and url[0] == '/' and url[1] != '/') return url; 2915 for ([_][]const u8{ "http://", "https://", "mailto:" }) |scheme| { 2916 if (std.ascii.startsWithIgnoreCase(url, scheme)) return url; 2917 } 2918 return null; 2919 } 2920 2921 fn sameLink(a: ?[]const u8, b: ?[]const u8) bool { 2922 if (a) |x| return if (b) |y| std.mem.eql(u8, x, y) else false; 2923 return b == null; 2924 } 2925 2926 fn appendEscapedHtml(allocator: std.mem.Allocator, out: *std.ArrayList(u8), input: []const u8) !void { 2927 for (input) |ch| { 2928 switch (ch) { 2929 '&' => try out.appendSlice(allocator, "&amp;"), 2930 '<' => try out.appendSlice(allocator, "&lt;"), 2931 '>' => try out.appendSlice(allocator, "&gt;"), 2932 '"' => try out.appendSlice(allocator, "&quot;"), 2933 '\'' => try out.appendSlice(allocator, "&#39;"), 2934 else => try out.append(allocator, ch), 2935 } 2936 } 2937 } 2938 2939 // --- helpers -------------------------------------------------------------- 2940 2941 fn getCookieValue(request: *std.http.Server.Request, name: []const u8) ?[]const u8 { 2942 var iter = request.iterateHeaders(); 2943 while (iter.next()) |header| { 2944 if (!std.ascii.eqlIgnoreCase(header.name, "cookie")) continue; 2945 var pairs = std.mem.splitScalar(u8, header.value, ';'); 2946 while (pairs.next()) |pair| { 2947 const trimmed = std.mem.trim(u8, pair, " \t"); 2948 const eq = std.mem.indexOfScalar(u8, trimmed, '=') orelse continue; 2949 if (std.mem.eql(u8, trimmed[0..eq], name)) { 2950 return trimmed[eq + 1 ..]; 2951 } 2952 } 2953 } 2954 return null; 2955 } 2956 2957 fn parseFormField(allocator: std.mem.Allocator, body: []const u8, key: []const u8) !?[]u8 { 2958 var iter = std.mem.splitScalar(u8, body, '&'); 2959 while (iter.next()) |pair| { 2960 const eq = std.mem.indexOfScalar(u8, pair, '=') orelse continue; 2961 if (std.mem.eql(u8, pair[0..eq], key)) { 2962 return try decodeFormValue(allocator, pair[eq + 1 ..]); 2963 } 2964 } 2965 return null; 2966 } 2967 2968 fn readFormBody(request: *std.http.Server.Request, allocator: std.mem.Allocator) ![]u8 { 2969 var buffer: [256]u8 = undefined; 2970 return request.readerExpectNone(&buffer).allocRemaining(allocator, .limited(65536)); 2971 } 2972 2973 fn decodeFormValue(allocator: std.mem.Allocator, encoded: []const u8) ![]u8 { 2974 var out: std.ArrayList(u8) = .empty; 2975 errdefer out.deinit(allocator); 2976 var i: usize = 0; 2977 while (i < encoded.len) : (i += 1) { 2978 switch (encoded[i]) { 2979 '+' => try out.append(allocator, ' '), 2980 '%' => { 2981 if (i + 2 >= encoded.len) return error.InvalidPercentEncoding; 2982 const hi = std.fmt.charToDigit(encoded[i + 1], 16) catch return error.InvalidPercentEncoding; 2983 const lo = std.fmt.charToDigit(encoded[i + 2], 16) catch return error.InvalidPercentEncoding; 2984 try out.append(allocator, hi * 16 + lo); 2985 i += 2; 2986 }, 2987 else => try out.append(allocator, encoded[i]), 2988 } 2989 } 2990 return try out.toOwnedSlice(allocator); 2991 } 2992 2993 // disk-backed web session store. each login mints a random, opaque token 2994 // (not the user's id) that is stored as a file named by the token hex, whose 2995 // contents are the raw user_id bytes. authenticating a request is a lookup of 2996 // the cookie's token; logout deletes the file, revoking the session. there is 2997 // deliberately no expiry — a session lives until logout. form failures use 2998 // files in the flash subdirectory that the redirected GET consumes. the 2999 // directory is cleared whenever the server starts. 3000 pub const SessionStore = struct { 3001 io: std.Io, 3002 dir: std.Io.Dir, 3003 flash_dir: std.Io.Dir, 3004 auto_login: ?[token_hex_len]u8, 3005 3006 pub const token_hex_len = evt.event_id_size * 2; 3007 3008 pub fn init(io: std.Io, data_dir: std.Io.Dir) !SessionStore { 3009 try data_dir.createDirPath(io, "sessions"); 3010 const dir = try data_dir.openDir(io, "sessions", .{}); 3011 errdefer dir.close(io); 3012 try dir.deleteTree(io, "flash"); 3013 try dir.createDirPath(io, "flash"); 3014 const flash_dir = try dir.openDir(io, "flash", .{}); 3015 errdefer flash_dir.close(io); 3016 const auto_login = blk: { 3017 const file = dir.openFile(io, auto_login_name, .{ .mode = .read_only }) catch break :blk null; 3018 defer file.close(io); 3019 var token: [token_hex_len]u8 = undefined; 3020 var storage: [token_hex_len]u8 = undefined; 3021 var reader = file.reader(io, &storage); 3022 reader.interface.readSliceAll(&token) catch break :blk null; 3023 break :blk token; 3024 }; 3025 return .{ .io = io, .dir = dir, .flash_dir = flash_dir, .auto_login = auto_login }; 3026 } 3027 3028 pub fn deinit(self: SessionStore) void { 3029 self.flash_dir.close(self.io); 3030 self.dir.close(self.io); 3031 } 3032 3033 // mint a new session for user_id, returning the token hex to set as the 3034 // cookie value. 3035 pub fn create(self: SessionStore, user_id: *const [evt.event_id_size]u8) ![token_hex_len]u8 { 3036 var token: [evt.event_id_size]u8 = undefined; 3037 self.io.random(&token); 3038 const token_hex = std.fmt.bytesToHex(token, .lower); 3039 const file = try self.dir.createFile(self.io, &token_hex, .{}); 3040 defer file.close(self.io); 3041 try file.writeStreamingAll(self.io, user_id); 3042 return token_hex; 3043 } 3044 3045 fn createFlash(self: SessionStore, allocator: std.mem.Allocator, value: ui.Session.FormFeedback) ![token_hex_len]u8 { 3046 var token: [evt.event_id_size]u8 = undefined; 3047 self.io.random(&token); 3048 const token_hex = std.fmt.bytesToHex(token, .lower); 3049 const file = try self.flash_dir.createFile(self.io, &token_hex, .{}); 3050 errdefer self.flash_dir.deleteFile(self.io, &token_hex) catch {}; 3051 defer file.close(self.io); 3052 3053 var json: std.Io.Writer.Allocating = .init(allocator); 3054 defer json.deinit(); 3055 try std.json.Stringify.value(value, .{}, &json.writer); 3056 try file.writeStreamingAll(self.io, json.written()); 3057 return token_hex; 3058 } 3059 3060 fn takeFlash(self: SessionStore, allocator: std.mem.Allocator, token_hex: []const u8) ?ui.Session.FormFeedback { 3061 if (!isToken(token_hex)) return null; 3062 const file = self.flash_dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return null; 3063 defer self.flash_dir.deleteFile(self.io, token_hex) catch {}; 3064 defer file.close(self.io); 3065 3066 var storage: [4096]u8 = undefined; 3067 var reader = file.reader(self.io, &storage); 3068 const bytes = reader.interface.allocRemaining(allocator, .limited(512 * 1024)) catch return null; 3069 return std.json.parseFromSliceLeaky(ui.Session.FormFeedback, allocator, bytes, .{}) catch null; 3070 } 3071 3072 // resolve a cookie's token to its user_id. returns false (logged out) for a 3073 // missing, malformed, or unknown token. 3074 pub fn lookup(self: SessionStore, token_hex: []const u8, out: *[evt.event_id_size]u8) bool { 3075 if (!isToken(token_hex)) return false; 3076 const file = self.dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return false; 3077 defer file.close(self.io); 3078 var storage: [evt.event_id_size]u8 = undefined; 3079 var file_reader = file.reader(self.io, &storage); 3080 file_reader.interface.readSliceAll(out) catch return false; 3081 return true; 3082 } 3083 3084 // revoke a session. a no-op for a missing or malformed token. 3085 pub fn remove(self: SessionStore, token_hex: []const u8) void { 3086 if (!isToken(token_hex)) return; 3087 self.dir.deleteFile(self.io, token_hex) catch {}; 3088 } 3089 3090 // leave `token_hex`'s session for visitors arriving without one. only the 3091 // `try` fixture writes one. the name can't collide with a session token. 3092 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 3093 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 3094 defer file.close(self.io); 3095 try file.writeStreamingAll(self.io, token_hex); 3096 } 3097 3098 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 3099 out.* = self.auto_login orelse return false; 3100 return true; 3101 } 3102 3103 const auto_login_name = "auto-login"; 3104 3105 // a token is exactly token_hex_len hex chars. validating before using the 3106 // value as a path keeps attacker-supplied cookies from escaping the 3107 // sessions dir (e.g. via "/" or ".." bytes). 3108 fn isToken(token_hex: []const u8) bool { 3109 if (token_hex.len != token_hex_len) return false; 3110 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 3111 return true; 3112 } 3113 }; 3114