arcade-mcp/libs/arcade-tdk/pyproject.toml
Francisco Or Something 8f5d0ff54e
Improve typed httpx error mapping and adapter guidance (#820)
## Summary

Routes HTTP adapter exceptions to the right error class instead of
shoe-horning everything into `UpstreamError`. Addresses Eric's earlier
feedback that several exceptions this PR was wrapping as `UpstreamError`
didn't satisfy the "something happened with the upstream" claim (local
pool exhaustion, client-side request construction, local TLS failures).

### Scope

- `UpstreamError` (unchanged) — upstream responded with an HTTP status
code.
- **`NetworkTransportError`** (new sibling in `arcade-core`) — no
complete response was received. `status_code=None`. Three kinds:
`NETWORK_TRANSPORT_RUNTIME_TIMEOUT`, `_UNREACHABLE`, `_UNMAPPED`.
- **`FatalToolError`** (existing) — client construction bugs
(`InvalidURL`, `UnsupportedProtocol`, `MissingSchema`, `InvalidHeader`,
`LocalProtocolError`, …) and local TLS/cert config failures. Never
retried.

---

## Before / After (per Eric's request)

Shows the error payload a tool produces for each exception, before this
PR vs. after. "Before" = current `main` (exceptions without real HTTP
responses fall through to the generic `@tool` `FatalToolError` catch-all
with `message=str(exc)`).

### No-response transport failures

| Exception | Before — class / message / kind | After — class / message
/ kind |
|---|---|---|
| `httpx.PoolTimeout` | `FatalToolError` — `str(exc)` leaks raw detail —
`TOOL_RUNTIME_FATAL`, not retryable | `NetworkTransportError` — `"HTTP
request timed out before a complete response was received."` —
`NETWORK_TRANSPORT_RUNTIME_TIMEOUT`, **retryable** |
| `httpx.ConnectTimeout` | same as above | same as PoolTimeout —
`TIMEOUT`, retryable |
| `httpx.ConnectError` (refused / DNS) | `FatalToolError` — `str(exc)` |
`NetworkTransportError` — `"HTTP request failed before reaching the
upstream service."` — `UNREACHABLE`, retryable |
| `httpx.RemoteProtocolError` (upstream sent bad HTTP) |
`FatalToolError` — `str(exc)` | `NetworkTransportError` — same message
as ConnectError — `UNREACHABLE`, retryable |
| `httpx.DecodingError` | `FatalToolError` — `str(exc)` |
`NetworkTransportError` — `"HTTP response from upstream could not be
decoded."` — `UNMAPPED`, retryable |
| `httpx.TooManyRedirects` | `FatalToolError` — `str(exc)` |
`NetworkTransportError` — `"HTTP redirect limit exceeded before a final
response was received."` — `UNMAPPED`, **not** retryable |

### Client construction / local env bugs

| Exception | Before | After |
|---|---|---|
| `httpx.UnsupportedProtocol`, `httpx.InvalidURL`,
`httpx.LocalProtocolError` | `FatalToolError` with `message=str(exc)`
(may leak scheme / URL content) | `FatalToolError` — `"Tool constructed
an invalid HTTP request — likely a tool-authoring bug."` —
`TOOL_RUNTIME_FATAL`, not retryable |
| `requests.MissingSchema`, `InvalidURL`, `InvalidHeader`,
`InvalidSchema`, `InvalidProxyURL`, `URLRequired` | same as above | same
as above |
| `requests.SSLError` | `FatalToolError` — `str(exc)` often contains raw
cert chain detail | `FatalToolError` — `"TLS handshake failed — likely a
local certificate or trust configuration issue."` —
`TOOL_RUNTIME_FATAL`, not retryable |

### Real HTTP response errors (UNCHANGED — same behavior)

| Exception | Class | Message | Kind | Retryable |
|---|---|---|---|---|
| `httpx.HTTPStatusError` 404 | `UpstreamError` | `"Upstream HTTP
request failed (Not Found, client error)."` |
`UPSTREAM_RUNTIME_NOT_FOUND` | No |
| `httpx.HTTPStatusError` 429 (w/ Retry-After: 60) |
`UpstreamRateLimitError` | `"Upstream HTTP request failed (Too Many
Requests, client error). Retry after 60 second(s)."` |
`UPSTREAM_RUNTIME_RATE_LIMIT` | Yes |
| `httpx.HTTPStatusError` 500 | `UpstreamError` | `"Upstream HTTP
request failed (Internal Server Error, server error)."` |
`UPSTREAM_RUNTIME_SERVER_ERROR` | Yes |

### What's no longer in the message

- Raw exception `str(exc)` output (which frequently includes the full
URL with query-string tokens, connection pool details, or cert chains)
is **no longer the agent-facing `message`**. It's preserved in
`developer_message` for server-side diagnostics.
- The misleading "Upstream HTTP…" prefix is gone from network-transport
and construction-bug messages. Those messages now honestly describe what
happened on the tool side.
- For 429s without a `Retry-After` header, we still show "Retry after N
seconds." (pre-existing behavior; see follow-up notes).

---

## Companion PRs

-
[ArcadeAI/arcade-mcp#823](https://github.com/ArcadeAI/arcade-mcp/pull/823)
— introduces `NetworkTransportError` in `arcade-core`
- [ArcadeAI/monorepo#911](https://github.com/ArcadeAI/monorepo/pull/911)
— adds the 3 `ErrorKind` constants to the Go engine and Datadog
dashboards
- [ArcadeAI/docs#920](https://github.com/ArcadeAI/docs/pull/920) —
documents the new hierarchy and adapter routing

## Follow-ups (out of scope for this PR)

A short investigation surfaced several pre-existing issues that are
worth fixing separately. A full list is in
`NETWORK_TRANSPORT_ERROR_FOLLOWUPS.md` (shared offline). Summary:

1. `requests.HTTPError` with `response is None` returns `None` from the
adapter; should fall through to the `NetworkTransportError(UNMAPPED)`
fallback instead of becoming a generic `FatalToolError`.
2. `developer_message` can leak URL query strings (and therefore tokens)
since it stores raw `str(exc)`.
3. `_sanitize_uri` does not strip userinfo (credentials in URL path).
4. `_parse_retry_ms` misinterprets epoch-style `x-ratelimit-reset`
headers.
5. 429 responses without `Retry-After` synthesize a fabricated "Retry
after 1 second(s)." suffix.
6. `UPSTREAM_RUNTIME_VALIDATION_ERROR` is defined but never emitted.
7. `UpstreamError` silently accepts out-of-range status codes.
8. `requests.HTTPError` branch re-extracts `request_url` /
`request_method` inconsistently (dead work).

## Test plan

- [x] Existing `libs/tests/sdk/test_httpx_adapter.py` +
`test_graphql_adapter.py` updated; every no-response / construction-bug
test asserts the new class + kind + `can_retry`.
- [x] Full test suite passes locally.
- [x] mypy clean on `arcade-core`, `arcade-tdk`, `arcade-mcp-server`.
- [x] Smoke-tested 21 exception routing cases end-to-end against real
httpx / requests exceptions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Changes core error classification and retryability for
`httpx`/`requests`/GraphQL transport failures, which can affect tool
retry behavior and telemetry. Risk is mitigated by extensive new/updated
tests covering the new mappings and privacy expectations.
> 
> **Overview**
> **Improves error adapter behavior to be more semantically correct and
privacy-safe.** The HTTP adapter now distinguishes real HTTP responses
(`UpstreamError`/`UpstreamRateLimitError`) from no-response failures
(`NetworkTransportError` with `ErrorKind` + retryability) and from
client construction/local TLS issues (`FatalToolError`).
> 
> **Reduces sensitive data exposure in agent-facing messages.**
Status-based errors now emit standardized messages derived from status
phrase/class, while preserving raw exception detail in
`developer_message`; Google/Microsoft/Slack fallback paths similarly
switch to `unhandled <ExceptionType>` messages and move `str(exc)` into
`developer_message`. GraphQL transport connection/protocol errors are
reclassified from `UpstreamError` (502) to `NetworkTransportError`, and
transport/server messages are standardized.
> 
> Bumps `arcade-tdk` version to `3.8.0` and expands/updates the SDK test
suite to assert new classes, `kind`, `can_retry`, request metadata
extraction, and privacy behavior.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
1041cb1bec4fa3b0bae3e7c6b860b84cf376cf9a. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-20 20:32:17 -03:00

47 lines
1.3 KiB
TOML

[project]
name = "arcade-tdk"
version = "3.8.0"
description = "Arcade TDK - Toolkit Development Kit for building Arcade tools"
readme = "README.md"
license = { text = "MIT" }
authors = [{ name = "Arcade", email = "dev@arcade.dev" }]
classifiers = [
"Development Status :: 5 - Production/Stable",
"Intended Audience :: Developers",
"License :: OSI Approved :: MIT License",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
"Programming Language :: Python :: 3.12",
"Programming Language :: Python :: 3.13",
]
requires-python = ">=3.10"
dependencies = ["arcade-core>=4.7.0,<5.0.0", "pydantic>=2.7.0"]
[project.optional-dependencies]
dev = [
"pytest>=8.1.2",
"pytest-cov>=4.0.0",
"mypy>=1.5.1",
"pre-commit>=3.4.0",
"pytest-asyncio>=0.23.7",
]
[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"
[tool.hatch.build.targets.wheel]
packages = ["arcade_tdk"]
[tool.mypy]
files = ["arcade_tdk"]
python_version = "3.10"
disallow_untyped_defs = true
disallow_any_unimported = true
no_implicit_optional = true
check_untyped_defs = true
warn_return_any = true
warn_unused_ignores = true
show_error_codes = true
ignore_missing_imports = true