| 1 | //! The public API: REST at api.g1t.sh and the MCP server at mcp.g1t.sh. |
| 2 | //! |
| 3 | //! One Worker, two hostnames. Both are thin adapters over the same |
| 4 | //! operations (see [`operations::Op`]), which call the services that own |
| 5 | //! the data. This Worker holds none. |
| 6 | |
| 7 | mod about; |
| 8 | mod run_artifacts; |
| 9 | mod archives; |
| 10 | mod addresses; |
| 11 | mod alerts; |
| 12 | mod audit; |
| 13 | mod billing; |
| 14 | mod blobs; |
| 15 | mod broker; |
| 16 | mod checks; |
| 17 | mod coordination; |
| 18 | mod deployments; |
| 19 | mod telemetry; |
| 20 | mod deploy_keys; |
| 21 | mod limits; |
| 22 | mod logs; |
| 23 | mod mcp; |
| 24 | mod notifications; |
| 25 | mod oauth; |
| 26 | mod oidc; |
| 27 | mod packages; |
| 28 | mod folios; |
| 29 | mod follow; |
| 30 | mod people; |
| 31 | mod openapi; |
| 32 | mod pins; |
| 33 | mod projects; |
| 34 | mod protection; |
| 35 | mod operations; |
| 36 | mod renamed; |
| 37 | #[cfg(test)] |
| 38 | mod responses; |
| 39 | mod rest; |
| 40 | mod rules; |
| 41 | mod runners; |
| 42 | mod security; |
| 43 | mod tools; |
| 44 | mod why; |
| 45 | mod token_policy; |
| 46 | mod toolkit; |
| 47 | |
| 48 | use g1t_contracts::identity::{ |
| 49 | DeviceClaim, DeviceClaimArgs, DeviceStart, DeviceStartArgs, TokenArgs, |
| 50 | }; |
| 51 | use g1t_contracts::work::{ |
| 52 | CheckRun, Mergeable, QueueState, ReportChecksArgs, ReportMergecheckArgs, |
| 53 | ReportQueueArgs, |
| 54 | }; |
| 55 | use g1t_contracts::{Failure, FailureCode, Outcome, PrincipalKind, User, Viewer}; |
| 56 | use g1t_kit::wire; |
| 57 | use serde_json::{Value, json}; |
| 58 | use worker::{Context, Env, Method, Request, Response, Result, event}; |
| 59 | |
| 60 | use operations::Services; |
| 61 | |
| 62 | fn method_name(method: Method) -> &'static str { |
| 63 | match method { |
| 64 | Method::Get => "GET", |
| 65 | Method::Post => "POST", |
| 66 | Method::Patch => "PATCH", |
| 67 | Method::Put => "PUT", |
| 68 | Method::Delete => "DELETE", |
| 69 | Method::Options => "OPTIONS", |
| 70 | Method::Head => "HEAD", |
| 71 | _ => "OTHER", |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /// A JSON response. Every body the API sends has its keys in `snake_case`; |
| 76 | /// the contracts it passes through are `camelCase`, so they are converted |
| 77 | /// here, on the way out (see [`g1t_kit::wire`]). The OpenAPI document and |
| 78 | /// the MCP protocol's own envelope keep the spelling their standards use. |
| 79 | pub(crate) fn reply<T: serde::Serialize>(value: &T) -> Result<Response> { |
| 80 | Response::from_json(&wire::snake_case(serde_json::to_value(value)?)) |
| 81 | } |
| 82 | |
| 83 | /// The parts of a job's spec (`POST /actions/jobs/{job}/spec`) that are the |
| 84 | /// workflow file, GitHub's contexts and event, and where to check out, all |
| 85 | /// passed through as they are. |
| 86 | const JOB_SPEC_AS_GIVEN: &[&str] = &[ |
| 87 | "spec", "workflow", "github", "event", "contexts", "checkout", "permissions", |
| 88 | ]; |
| 89 | |
| 90 | /// Puts the toolkit's variables in a job's spec: its runtime token, where |
| 91 | /// the toolkit's services are, and where to ask for an OIDC token when the |
| 92 | /// job may have one and this installation issues them. The `runtime` the |
| 93 | /// actions service sent goes no further. |
| 94 | fn with_runtime(spec: &mut Value, api: &str, oidc: bool) { |
| 95 | let Some(runtime) = spec.as_object_mut().and_then(|s| s.remove("runtime")) else { return }; |
| 96 | let Some(token) = runtime["token"].as_str().filter(|t| !t.is_empty()) else { return }; |
| 97 | let id_token = oidc && runtime["id_token"].as_bool() == Some(true); |
| 98 | let vars = toolkit::runtime_variables(api, token, id_token); |
| 99 | if let Some(variables) = spec.get_mut("variables").and_then(Value::as_object_mut) { |
| 100 | variables.extend(vars); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /// What a person whose account has not confirmed its email address may |
| 105 | /// call: who they are, their addresses, and confirming one with the code |
| 106 | /// from the email. Nothing over MCP. |
| 107 | fn pending_may(method: &str, path: &str, on_mcp: bool) -> bool { |
| 108 | !on_mcp |
| 109 | && matches!( |
| 110 | (method, path.trim_end_matches('/')), |
| 111 | ("GET", "/user") | ("GET", "/user/emails") | ("POST", "/user/emails/confirm") |
| 112 | ) |
| 113 | } |
| 114 | |
| 115 | /// An error in the shape every endpoint uses. |
| 116 | fn failure(failure: &Failure) -> Result<Response> { |
| 117 | Ok(reply(&json!({ "error": failure }))?.with_status(failure.code.http_status())) |
| 118 | } |
| 119 | |
| 120 | fn fail(code: FailureCode, message: &str) -> Result<Response> { |
| 121 | failure(&Failure { |
| 122 | code, |
| 123 | message: message.to_owned(), |
| 124 | }) |
| 125 | } |
| 126 | |
| 127 | /// A request body as JSON. An empty or malformed body is no input. |
| 128 | async fn json_body(request: &mut Request) -> Value { |
| 129 | request.json().await.unwrap_or(Value::Null) |
| 130 | } |
| 131 | |
| 132 | /// Who a request's `Authorization: Bearer g1t_…` (or `token g1t_…`, as |
| 133 | /// Octokit sends it) names. A missing token is an anonymous viewer; a |
| 134 | /// wrong one is refused, so that a typo does not silently look signed out. |
| 135 | async fn authenticate( |
| 136 | request: &Request, |
| 137 | services: &Services, |
| 138 | ) -> Result<std::result::Result<Viewer, Response>> { |
| 139 | let header = request.headers().get("authorization")?.unwrap_or_default(); |
| 140 | let Some(token) = limits::bearer(&header) else { |
| 141 | return Ok(Ok(None)); |
| 142 | }; |
| 143 | let viewer: Viewer = g1t_kit::call( |
| 144 | &services.identity, |
| 145 | "user_for_access_token", |
| 146 | &TokenArgs { |
| 147 | token: token.to_owned(), |
| 148 | }, |
| 149 | ) |
| 150 | .await?; |
| 151 | if viewer.is_some() { |
| 152 | return Ok(Ok(viewer)); |
| 153 | } |
| 154 | let mut response = fail(FailureCode::Unauthenticated, "Invalid access token.")?; |
| 155 | // Tells an MCP client where to sign in again. |
| 156 | response.headers_mut().set( |
| 157 | "www-authenticate", |
| 158 | &format!("{}, error=\"invalid_token\"", services.addresses.mcp_challenge()), |
| 159 | )?; |
| 160 | Ok(Err(response)) |
| 161 | } |
| 162 | |
| 163 | /// Where everything is, for someone or something exploring the API. |
| 164 | fn index(addresses: &addresses::Addresses) -> Value { |
| 165 | let api = &addresses.api; |
| 166 | let repo = format!("{api}/repos/{{owner}}/{{name}}"); |
| 167 | json!({ |
| 168 | "documentation_url": "https://docs.g1t.sh/reference/api/", |
| 169 | "openapi_url": format!("{api}/openapi.json"), |
| 170 | "mcp_url": addresses.mcp, |
| 171 | "current_user_url": format!("{api}/user"), |
| 172 | "workspaces_url": format!("{api}/workspaces"), |
| 173 | "repositories_url": format!("{api}/repos{{?q}}"), |
| 174 | "search_url": format!("{api}/search{{?q,type,page,per_page}}"), |
| 175 | "repository_url": repo, |
| 176 | "repository_events_url": format!("{repo}/events{{?before}}"), |
| 177 | "labels_url": format!("{repo}/labels"), |
| 178 | "issues_url": format!("{repo}/issues{{?state,label}}"), |
| 179 | "issue_url": format!("{repo}/issues/{{number}}"), |
| 180 | "issue_comments_url": format!("{repo}/issues/{{number}}/comments"), |
| 181 | "pulls_url": format!("{repo}/pulls{{?state}}"), |
| 182 | "pull_url": format!("{repo}/pulls/{{number}}"), |
| 183 | "pull_changes_url": format!("{repo}/pulls/{{number}}/changes"), |
| 184 | "pull_reviews_url": format!("{repo}/pulls/{{number}}/reviews"), |
| 185 | "pull_session_url": format!("{repo}/pulls/{{number}}/session{{?after}}"), |
| 186 | "device_code_url": format!("{api}/device/code"), |
| 187 | "device_token_url": format!("{api}/device/token"), |
| 188 | "oauth_metadata_url": format!("{api}/.well-known/oauth-authorization-server"), |
| 189 | "git_url": format!("{}/{{owner}}/{{name}}.git", addresses.site), |
| 190 | "integrations_url": format!("{api}/workspaces/{{workspace}}/integrations"), |
| 191 | "context_url": format!("{repo}/context{{?reference}}"), |
| 192 | "import_issue_url": format!("{repo}/issues/import"), |
| 193 | "hooks_url": format!("{api}/hooks/{{integration}}"), |
| 194 | }) |
| 195 | } |
| 196 | |
| 197 | // Signing in from a tool. Accounts are created, and passwords typed, only |
| 198 | // in a browser; a tool gets its token by having a person approve a code. |
| 199 | |
| 200 | /// Passes a request from an outside system to its connection, as it came: |
| 201 | /// its signature covers the exact bytes of the body. |
| 202 | async fn receive_hook(request: &mut Request, services: &Services, id: &str) -> Result<Response> { |
| 203 | let headers: std::collections::HashMap<String, String> = request |
| 204 | .headers() |
| 205 | .entries() |
| 206 | .map(|(name, value)| (name.to_lowercase(), value)) |
| 207 | .collect(); |
| 208 | let body = request.text().await.unwrap_or_default(); |
| 209 | // A push to GitHub with many commits makes a large payload. |
| 210 | let limit = if id == "github" { 10_000_000 } else { 1_000_000 }; |
| 211 | if body.len() > limit { |
| 212 | return Ok(reply(&json!({ "message": "The body is too large." }))?.with_status(413)); |
| 213 | } |
| 214 | // g1t's GitHub App has one webhook for every installation; it is |
| 215 | // checked against the app's own secret. |
| 216 | let (method, args) = if id == "github" { |
| 217 | ("github_receive", json!({ "headers": headers, "body": body })) |
| 218 | } else { |
| 219 | ("receive", json!({ "id": id, "headers": headers, "body": body })) |
| 220 | }; |
| 221 | let received: g1t_contracts::integrations::Received = |
| 222 | g1t_kit::call(&services.integrations, method, &args).await?; |
| 223 | Ok(reply(&json!({ "message": received.message }))?.with_status(received.status)) |
| 224 | } |
| 225 | |
| 226 | async fn receive_stripe(request: &mut Request, env: &Env) -> Result<Response> { |
| 227 | let signature = request.headers().get("stripe-signature")?.unwrap_or_default(); |
| 228 | let payload = request.text().await.unwrap_or_default(); |
| 229 | if payload.len() > 1_000_000 || signature.is_empty() { |
| 230 | return Ok(reply(&json!({ "message": "Not a Stripe event." }))?.with_status(400)); |
| 231 | } |
| 232 | let handled: g1t_contracts::Outcome<bool> = g1t_kit::call( |
| 233 | &env.service("BILLING")?, |
| 234 | "stripe_webhook", |
| 235 | &g1t_contracts::billing::StripeWebhookArgs { payload, signature }, |
| 236 | ) |
| 237 | .await?; |
| 238 | // A refusal is a 400, so Stripe shows it as failed; anything handled, |
| 239 | // or already handled, is a 200, so Stripe stops sending it. |
| 240 | Ok(match handled { |
| 241 | g1t_contracts::Outcome::Ok(_) => reply(&json!({ "received": true }))?, |
| 242 | g1t_contracts::Outcome::Fail(failure) => { |
| 243 | reply(&json!({ "message": failure.message }))?.with_status(400) |
| 244 | } |
| 245 | }) |
| 246 | } |
| 247 | |
| 248 | async fn device_code(request: &mut Request, services: &Services) -> Result<Response> { |
| 249 | let body = json_body(request).await; |
| 250 | let started: DeviceStart = g1t_kit::call( |
| 251 | &services.identity, |
| 252 | "device_start", |
| 253 | &DeviceStartArgs { |
| 254 | client_name: body["client_name"].as_str().unwrap_or_default().to_owned(), |
| 255 | }, |
| 256 | ) |
| 257 | .await?; |
| 258 | reply(&json!({ |
| 259 | "device_code": started.device_code, |
| 260 | "user_code": started.user_code, |
| 261 | "verification_uri": format!("{}/device", services.addresses.site), |
| 262 | "verification_uri_complete": format!("{}/device?code={}", services.addresses.site, started.user_code), |
| 263 | "expires_in": started.expires_in, |
| 264 | "interval": started.interval, |
| 265 | })) |
| 266 | } |
| 267 | |
| 268 | async fn device_token(request: &mut Request, services: &Services) -> Result<Response> { |
| 269 | let body = json_body(request).await; |
| 270 | let claim: DeviceClaim = g1t_kit::call( |
| 271 | &services.identity, |
| 272 | "device_claim", |
| 273 | &DeviceClaimArgs { |
| 274 | device_code: body["device_code"].as_str().unwrap_or_default().to_owned(), |
| 275 | }, |
| 276 | ) |
| 277 | .await?; |
| 278 | reply(&match claim { |
| 279 | DeviceClaim::Approved { token, user } => json!({ |
| 280 | "status": "approved", |
| 281 | "token": token, |
| 282 | "display_username": user.display_username.clone().filter(|display| display.eq_ignore_ascii_case(&user.username)).unwrap_or_else(|| user.username.clone()), |
| 283 | "username": user.username, |
| 284 | "verified": user.verified, |
| 285 | }), |
| 286 | DeviceClaim::Pending => json!({ "status": "pending" }), |
| 287 | DeviceClaim::Denied => json!({ "status": "denied" }), |
| 288 | DeviceClaim::Expired => json!({ "status": "expired" }), |
| 289 | }) |
| 290 | } |
| 291 | |
| 292 | /// A sandbox reporting on a run of an issue's commands, from before a pull |
| 293 | /// request's checks were the workflows run on it. |
| 294 | /// The run's own token, in the body, is the credential: it was given to |
| 295 | /// that sandbox and to nothing else. |
| 296 | async fn report_checks( |
| 297 | request: &mut Request, |
| 298 | services: &Services, |
| 299 | run_id: &str, |
| 300 | ) -> Result<Response> { |
| 301 | let body = json_body(request).await; |
| 302 | let reported: Outcome<CheckRun> = g1t_kit::call( |
| 303 | &services.work, |
| 304 | "report_checks", |
| 305 | &ReportChecksArgs { |
| 306 | run_id: run_id.to_owned(), |
| 307 | token: body["token"].as_str().unwrap_or_default().to_owned(), |
| 308 | results: serde_json::from_value(body["results"].clone()).unwrap_or_default(), |
| 309 | error: body["error"].as_str().map(str::to_owned), |
| 310 | skip: false, |
| 311 | }, |
| 312 | ) |
| 313 | .await?; |
| 314 | match reported { |
| 315 | Outcome::Ok(run) => reply(&json!({ "status": run.status })), |
| 316 | Outcome::Fail(refused) => failure(&refused), |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /// A sandbox reporting one tested state of a merge queue. As with checks, |
| 321 | /// the entry's own token is the credential. |
| 322 | async fn report_queue( |
| 323 | request: &mut Request, |
| 324 | services: &Services, |
| 325 | entry_id: &str, |
| 326 | ) -> Result<Response> { |
| 327 | let body = json_body(request).await; |
| 328 | let reported: Outcome<QueueState> = g1t_kit::call( |
| 329 | &services.work, |
| 330 | "report_queue", |
| 331 | &ReportQueueArgs { |
| 332 | entry_id: entry_id.to_owned(), |
| 333 | token: body["token"].as_str().unwrap_or_default().to_owned(), |
| 334 | combined_commit: body["combinedCommit"].as_str().map(str::to_owned), |
| 335 | results: serde_json::from_value(body["results"].clone()).unwrap_or_default(), |
| 336 | error: body["error"].as_str().map(str::to_owned), |
| 337 | conflict_with: body["conflictWith"].as_u64().map(|n| n as u32), |
| 338 | conflicts: serde_json::from_value(body["conflicts"].clone()).unwrap_or_default(), |
| 339 | }, |
| 340 | ) |
| 341 | .await?; |
| 342 | match reported { |
| 343 | Outcome::Ok(state) => reply(&json!({ "state": state })), |
| 344 | Outcome::Fail(refused) => failure(&refused), |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | /// A sandbox reporting whether a pull request merges cleanly. As with |
| 349 | /// checks, the probe's own token is the credential. |
| 350 | async fn report_mergecheck( |
| 351 | request: &mut Request, |
| 352 | services: &Services, |
| 353 | pull_id: &str, |
| 354 | ) -> Result<Response> { |
| 355 | let body = json_body(request).await; |
| 356 | let reported: Outcome<Mergeable> = g1t_kit::call( |
| 357 | &services.work, |
| 358 | "report_mergecheck", |
| 359 | &ReportMergecheckArgs { |
| 360 | pull_id: pull_id.to_owned(), |
| 361 | token: body["token"].as_str().unwrap_or_default().to_owned(), |
| 362 | conflicts: serde_json::from_value(body["conflicts"].clone()).unwrap_or_default(), |
| 363 | error: body["error"].as_str().map(str::to_owned), |
| 364 | }, |
| 365 | ) |
| 366 | .await?; |
| 367 | match reported { |
| 368 | Outcome::Ok(state) => reply(&json!({ "mergeable": state })), |
| 369 | Outcome::Fail(refused) => failure(&refused), |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | /// A backup's sandbox, passed on to the repos service, which holds the |
| 374 | /// job (services/repos/src/backups.rs; the flow is in |
| 375 | /// `g1t_contracts::backups`): |
| 376 | /// |
| 377 | /// - `POST /backups/{job}/spec`: what to cut, and a read-only git credential |
| 378 | /// - `PUT /backups/{job}/parts/{n}`: one part of the bundle, as bytes |
| 379 | /// - `POST /backups/{job}/complete` with `{ refs, size, sha256, parts, fetched_bytes }` |
| 380 | /// - `POST /backups/{job}/fail` with `{ error, fetched_bytes }` |
| 381 | /// |
| 382 | /// Bodies are passed through as they are: snake_case already, and a |
| 383 | /// bundle's refs are keyed by ref names, which must not be converted. |
| 384 | async fn backup_job(request: &mut Request, services: &Services, method: &str, path: &str) -> Result<Response> { |
| 385 | use g1t_contracts::backups::TOKEN_HEADER; |
| 386 | let token = request.headers().get(TOKEN_HEADER)?.unwrap_or_default(); |
| 387 | let rest = path.trim_start_matches("/backups/"); |
| 388 | let (job, action) = rest.split_once('/').unwrap_or((rest, "")); |
| 389 | if job.is_empty() || token.is_empty() { |
| 390 | return fail(FailureCode::Unauthenticated, "A backup job's token is required."); |
| 391 | } |
| 392 | if method == "PUT" && action.starts_with("parts/") { |
| 393 | let bytes = request.bytes().await?; |
| 394 | if bytes.len() as u64 > g1t_contracts::backups::PART_BYTES { |
| 395 | return fail(FailureCode::Invalid, "A part holds 32 MiB at most."); |
| 396 | } |
| 397 | let headers = worker::Headers::new(); |
| 398 | headers.set(TOKEN_HEADER, &token)?; |
| 399 | let mut init = worker::RequestInit::new(); |
| 400 | init.with_method(Method::Put) |
| 401 | .with_headers(headers) |
| 402 | .with_body(Some(worker::js_sys::Uint8Array::from(bytes.as_slice()).into())); |
| 403 | let forwarded = Request::new_with_init(&format!("https://repos/backups/{job}/{action}"), &init)?; |
| 404 | let mut answered = services.repos.fetch_request(forwarded).await?; |
| 405 | return outcome_as_given(answered.json().await?); |
| 406 | } |
| 407 | let rpc = match (method, action) { |
| 408 | ("POST", "spec") => "backup_spec", |
| 409 | ("POST", "complete") => "backup_complete", |
| 410 | ("POST", "fail") => "backup_fail", |
| 411 | _ => return fail(FailureCode::NotFound, "No such endpoint."), |
| 412 | }; |
| 413 | let mut body = json_body(request).await; |
| 414 | if !body.is_object() { |
| 415 | body = json!({}); |
| 416 | } |
| 417 | body["job_id"] = json!(job); |
| 418 | body["token"] = json!(token); |
| 419 | let answered: Value = g1t_kit::call(&services.repos, rpc, &body).await?; |
| 420 | outcome_as_given(answered) |
| 421 | } |
| 422 | |
| 423 | /// An `Outcome` from a service whose keys are already the API's: the value, |
| 424 | /// or the failure in the shape every endpoint uses. |
| 425 | fn outcome_as_given(answered: Value) -> Result<Response> { |
| 426 | match serde_json::from_value::<Outcome<Value>>(answered)? { |
| 427 | Outcome::Ok(value) => Response::from_json(&value), |
| 428 | Outcome::Fail(refused) => failure(&refused), |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | async fn respond(mut request: Request, env: &Env) -> Result<Response> { |
| 433 | let method = method_name(request.method()); |
| 434 | if method == "OPTIONS" { |
| 435 | return Ok(Response::empty()?.with_status(204)); |
| 436 | } |
| 437 | let url = request.url()?; |
| 438 | // Paths carry no version. An earlier form began with `/v1`, which is |
| 439 | // still accepted so that nothing already written against it breaks. |
| 440 | let path = match url.path().strip_prefix("/v1") { |
| 441 | Some(rest) if rest.is_empty() || rest.starts_with('/') => rest.to_owned(), |
| 442 | _ => url.path().to_owned(), |
| 443 | }; |
| 444 | let mut services = Services::new(env)?; |
| 445 | // MCP is a host of its own hosted, and may be a path on this one |
| 446 | // self-hosted (addresses.rs). |
| 447 | let on_mcp = services.addresses.mcp_path(&url).is_some(); |
| 448 | |
| 449 | // Stripe reporting to billing. Signed with the secret of the endpoint |
| 450 | // billing registered; the body goes through exactly as received, since |
| 451 | // the signature covers its bytes. |
| 452 | if method == "POST" && !on_mcp && path == "/stripe/webhook" { |
| 453 | return receive_stripe(&mut request, env).await; |
| 454 | } |
| 455 | |
| 456 | // Outside systems reporting to a connection. They sign what they send |
| 457 | // with the connection's own secret, which is not a g1t token, so this |
| 458 | // comes before anything that would read one. |
| 459 | if method == "POST" && !on_mcp |
| 460 | && let Some(id) = path.strip_prefix("/hooks/").filter(|id| !id.is_empty() && !id.contains('/')) { |
| 461 | return receive_hook(&mut request, &services, id).await; |
| 462 | } |
| 463 | |
| 464 | // A sandbox building a deployment, reporting with its build's token, |
| 465 | // which is not a g1t token, or a container app's Worker reporting how |
| 466 | // long its container ran, with its own token. The body goes through as |
| 467 | // it is: it can carry a Worker's bundled code. |
| 468 | if method == "POST" && !on_mcp |
| 469 | && let Some(rest) = path |
| 470 | .strip_prefix("/deployments/jobs/") |
| 471 | .map(|rest| format!("jobs/{rest}")) |
| 472 | .or_else(|| path.strip_prefix("/deployments/apps/").filter(|rest| rest.ends_with("/meter")).map(|rest| format!("apps/{rest}"))) |
| 473 | { |
| 474 | let target = format!("https://deployments/{rest}"); |
| 475 | let body = request.bytes().await?; |
| 476 | let headers = worker::Headers::new(); |
| 477 | headers.set("content-type", "application/json")?; |
| 478 | let mut init = worker::RequestInit::new(); |
| 479 | init.with_method(Method::Post) |
| 480 | .with_headers(headers) |
| 481 | .with_body(Some(worker::js_sys::Uint8Array::from(body.as_slice()).into())); |
| 482 | let mut answer = env |
| 483 | .service("DEPLOYMENTS")? |
| 484 | .fetch_request(Request::new_with_init(&target, &init)?) |
| 485 | .await?; |
| 486 | // A fresh response: a fetched one's headers cannot be changed, and |
| 487 | // every response gets the API's own on the way out. |
| 488 | let status = answer.status_code(); |
| 489 | let bytes = answer.bytes().await?; |
| 490 | let bytes = match serde_json::from_slice::<Value>(&bytes) { |
| 491 | Ok(body) => serde_json::to_vec(&wire::snake_case(body))?, |
| 492 | Err(_) => bytes, |
| 493 | }; |
| 494 | return Ok(Response::from_bytes(bytes)? |
| 495 | .with_status(status) |
| 496 | .with_headers({ |
| 497 | let headers = worker::Headers::new(); |
| 498 | headers.set("content-type", "application/json")?; |
| 499 | headers |
| 500 | })); |
| 501 | } |
| 502 | |
| 503 | // The services GitHub's toolkit calls from inside a job, with its |
| 504 | // runtime token, and the links they hand out (toolkit.rs). |
| 505 | if !on_mcp && method == "POST" |
| 506 | && let Some(rest) = path.strip_prefix("/twirp/") |
| 507 | { |
| 508 | let (service, rpc) = rest.split_once('/').unwrap_or((rest, "")); |
| 509 | let (service, rpc) = (service.to_owned(), rpc.to_owned()); |
| 510 | return toolkit::twirp(request, env, &services, &service, &rpc).await; |
| 511 | } |
| 512 | if !on_mcp && let Some(rest) = path.strip_prefix("/actions/toolkit/_apis/artifactcache/") { |
| 513 | let rest = rest.to_owned(); |
| 514 | return toolkit::cache_v1(request, env, &services, method, &rest).await; |
| 515 | } |
| 516 | if !on_mcp && let Some(token) = path.strip_prefix("/actions/toolkit/blobs/") { |
| 517 | let token = token.to_owned(); |
| 518 | return toolkit::blob(request, env, &services, method, &token).await; |
| 519 | } |
| 520 | // g1t as an OIDC issuer for workflow jobs (oidc.rs). |
| 521 | if !on_mcp && method == "GET" && path.starts_with("/actions/oidc/") { |
| 522 | return oidc::handle(&request, env, &services, &path).await; |
| 523 | } |
| 524 | |
| 525 | // A sandbox's artifacts and cache, with its job's token, which is not a |
| 526 | // g1t token either. |
| 527 | if !on_mcp |
| 528 | && let Some(rest) = path.strip_prefix("/actions/jobs/") |
| 529 | && (rest.contains("/artifacts") || rest.ends_with("/cache") || rest.contains("/cache/uploads")) |
| 530 | { |
| 531 | let rest = rest.to_owned(); |
| 532 | return blobs::for_job(request, env, &services, method, &rest).await; |
| 533 | } |
| 534 | // A self-hosted job's request to a brokered secret's host, passed to |
| 535 | // g1t to be filled in (broker.rs). The job's token is the credential. |
| 536 | if !on_mcp |
| 537 | && method == "POST" |
| 538 | && let Some(job) = broker::job_of(&path) |
| 539 | { |
| 540 | let job = job.to_owned(); |
| 541 | return broker::relay(request, &services, &job).await; |
| 542 | } |
| 543 | |
| 544 | // A self-hosted runner, with a registration token or its own |
| 545 | // credential, neither of which is a g1t access token. |
| 546 | if method == "POST" |
| 547 | && !on_mcp |
| 548 | && path.starts_with("/runners/") |
| 549 | && let Some(response) = runners::handle(&mut request, &services, &path).await? |
| 550 | { |
| 551 | return Ok(response); |
| 552 | } |
| 553 | |
| 554 | // Per token, or per address without one (limits.rs). |
| 555 | if let Some(limited) = limits::limited(&request, env, method, &path, on_mcp).await? { |
| 556 | return Ok(limited); |
| 557 | } |
| 558 | let viewer = match authenticate(&request, &services).await? { |
| 559 | Ok(viewer) => viewer, |
| 560 | Err(refused) => return Ok(limits::wrong_token(&request, env, on_mcp).await?.unwrap_or(refused)), |
| 561 | }; |
| 562 | // A person who has not confirmed their email address: who they are, |
| 563 | // their addresses, and confirming one, nothing else (REST or MCP). |
| 564 | if viewer.as_ref().is_some_and(User::awaits_confirmation) && !pending_may(method, &path, on_mcp) { |
| 565 | return fail( |
| 566 | FailureCode::Forbidden, |
| 567 | &g1t_contracts::accounts::confirm_email_first(&services.addresses.site), |
| 568 | ); |
| 569 | } |
| 570 | services.audit = audit::AuditContext::of(&request, on_mcp); |
| 571 | // A run's token: what it may do comes with it, on the composite |
| 572 | // identity identity resolved it to. Any other token of g1t's own |
| 573 | // principal (the agent tokens g1t no longer issues) does nothing. |
| 574 | if let Some(acting) = viewer.as_ref().and_then(|viewer| viewer.acting.as_ref()) { |
| 575 | services.scope = Some(acting.scope.clone()); |
| 576 | } else if viewer.as_ref().is_some_and(|viewer| viewer.kind == PrincipalKind::Agent) { |
| 577 | return fail(FailureCode::Unauthenticated, "Invalid access token."); |
| 578 | } |
| 579 | if let Some(response) = oauth::handle(&mut request, &services, method, &path).await? { |
| 580 | return Ok(response); |
| 581 | } |
| 582 | if on_mcp { |
| 583 | return mcp::handle(request, &services, &viewer).await; |
| 584 | } |
| 585 | |
| 586 | // Workflow logs to download: a run's as a zip, a job's as text (logs.rs). |
| 587 | if method == "GET" { |
| 588 | let text = url.query_pairs().any(|(name, value)| name == "format" && value == "text"); |
| 589 | if let Some(wanted) = logs::wanted(&path, text) { |
| 590 | return logs::download(&services, &viewer, wanted).await; |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | match (method, path.trim_end_matches('/')) { |
| 595 | ("GET", "") => return reply(&index(&services.addresses)), |
| 596 | ("GET", "/openapi.json") => return Response::from_json(&openapi::document()), |
| 597 | // One of a run's artifacts downloaded by name (the run's artifacts |
| 598 | // are listed by the REST route in rest.rs). |
| 599 | ("GET", path) if path.starts_with("/repos/") && path.contains("/actions/runs/") && path.contains("/artifacts/") => { |
| 600 | let parts: Vec<&str> = path.trim_start_matches("/repos/").split('/').collect(); |
| 601 | if let [owner, repo, "actions", "runs", run, "artifacts", name] = parts.as_slice() { |
| 602 | // A workflow job's token reaches its own repository only. |
| 603 | if viewer |
| 604 | .as_ref() |
| 605 | .and_then(|user| user.token.as_deref()) |
| 606 | .is_some_and(|token| !token.reaches(&format!("{owner}/{repo}"))) |
| 607 | { |
| 608 | return fail(FailureCode::NotFound, "No such run."); |
| 609 | } |
| 610 | return blobs::download(env, &services, &viewer, owner, repo, run, name).await; |
| 611 | } |
| 612 | } |
| 613 | ("POST", "/device/code") => return device_code(&mut request, &services).await, |
| 614 | ("POST", "/device/token") => return device_token(&mut request, &services).await, |
| 615 | // Where a pull request lives, for a tool that knows only its fork. |
| 616 | ("GET", path) if path.starts_with("/pulls/") && !path[7..].contains('/') => { |
| 617 | let located: Outcome<Value> = g1t_kit::call( |
| 618 | &services.work, |
| 619 | "locate_pull", |
| 620 | &json!({ "id": &path[7..], "viewer": viewer }), |
| 621 | ) |
| 622 | .await?; |
| 623 | return match located { |
| 624 | Outcome::Ok(value) => reply(&value), |
| 625 | Outcome::Fail(refused) => failure(&refused), |
| 626 | }; |
| 627 | } |
| 628 | ("POST", path) if path.starts_with("/mergechecks/") => { |
| 629 | let pull_id = path.trim_start_matches("/mergechecks/").to_owned(); |
| 630 | return report_mergecheck(&mut request, &services, &pull_id).await; |
| 631 | } |
| 632 | // A sandbox making a repository's nightly backup. The job's own |
| 633 | // token, in its header, is the credential. |
| 634 | (method, path) if path.starts_with("/backups/") => { |
| 635 | return backup_job(&mut request, &services, method, path).await; |
| 636 | } |
| 637 | ("POST", path) if path.starts_with("/queue/") => { |
| 638 | let entry_id = path.trim_start_matches("/queue/").to_owned(); |
| 639 | return report_queue(&mut request, &services, &entry_id).await; |
| 640 | } |
| 641 | // A sandbox running a GitHub Actions job: fetching the job, and |
| 642 | // reporting how it goes. The job's own token is the credential. |
| 643 | // A sandbox downloading an action's archive that g1t keeps |
| 644 | // (actions' registry.rs). The job's own token is the credential. |
| 645 | ("POST", path) if path.starts_with("/actions/jobs/") && path.ends_with("/archive") => { |
| 646 | let job = path.trim_start_matches("/actions/jobs/").trim_end_matches("/archive").to_owned(); |
| 647 | let body = json_body(&mut request).await; |
| 648 | let kept: Outcome<Value> = g1t_kit::call( |
| 649 | &services.actions, |
| 650 | "job_action_archive", |
| 651 | &json!({ "job": job, "token": body["token"], "report": body["report"] }), |
| 652 | ) |
| 653 | .await?; |
| 654 | let kept = match kept { |
| 655 | Outcome::Ok(kept) => kept, |
| 656 | Outcome::Fail(refused) => return failure(&refused), |
| 657 | }; |
| 658 | let bucket = env.bucket("ACTIONS_CACHE")?; |
| 659 | let object = kept["object"].as_str().unwrap_or_default(); |
| 660 | let Some(stored) = bucket.get(object).execute().await? else { |
| 661 | return fail(FailureCode::NotFound, "The archive is gone."); |
| 662 | }; |
| 663 | let Some(body) = stored.body() else { |
| 664 | return fail(FailureCode::NotFound, "The archive is gone."); |
| 665 | }; |
| 666 | let mut response = Response::from_body(body.response_body()?)?; |
| 667 | response.headers_mut().set("content-type", "application/gzip")?; |
| 668 | return Ok(response); |
| 669 | } |
| 670 | ("POST", path) if path.starts_with("/actions/jobs/") => { |
| 671 | let rest = path.trim_start_matches("/actions/jobs/"); |
| 672 | // `/action`: where to fetch another repository's action from (on |
| 673 | // g1t, with a read token for a private one, or GitHub). |
| 674 | let (job, method) = match (rest.strip_suffix("/spec"), rest.strip_suffix("/action")) { |
| 675 | (Some(job), _) => (job.to_owned(), "job_spec"), |
| 676 | (_, Some(job)) => (job.to_owned(), "job_action"), |
| 677 | _ => (rest.to_owned(), "job_report"), |
| 678 | }; |
| 679 | let body = json_body(&mut request).await; |
| 680 | // `rotate`: a harness that takes a new token with the spec and |
| 681 | // lets go of the one it asked with (plan.rs `job_spec`). |
| 682 | let rotate = method == "job_spec" && body["rotate"].as_bool() == Some(true); |
| 683 | // `broker`: a self-hosted harness that passes its job's |
| 684 | // requests to brokered hosts through g1t (broker.rs). |
| 685 | let broker = method == "job_spec" && body["broker"].as_bool() == Some(true); |
| 686 | let answered: Outcome<Value> = g1t_kit::call( |
| 687 | &services.actions, |
| 688 | method, |
| 689 | &json!({ "job": job, "token": body["token"], "report": body["report"], "rotate": rotate, "broker": broker }), |
| 690 | ) |
| 691 | .await?; |
| 692 | return match answered { |
| 693 | // A job's spec is the workflow and its contexts as GitHub |
| 694 | // has them; only g1t's own keys around them are converted. |
| 695 | Outcome::Ok(value) => { |
| 696 | let mut spec = wire::snake_case_keeping(value, JOB_SPEC_AS_GIVEN); |
| 697 | with_runtime(&mut spec, &services.addresses.api, oidc::configured(env)); |
| 698 | Response::from_json(&spec) |
| 699 | } |
| 700 | Outcome::Fail(refused) => failure(&refused), |
| 701 | }; |
| 702 | } |
| 703 | ("POST", path) if path.starts_with("/checks/") => { |
| 704 | let run_id = path.trim_start_matches("/checks/").to_owned(); |
| 705 | return report_checks(&mut request, &services, &run_id).await; |
| 706 | } |
| 707 | _ => {} |
| 708 | } |
| 709 | |
| 710 | let query: Vec<(String, String)> = url |
| 711 | .query_pairs() |
| 712 | .map(|(name, value)| (name.into_owned(), value.into_owned())) |
| 713 | .collect(); |
| 714 | let body = if method == "GET" { |
| 715 | Value::Null |
| 716 | } else { |
| 717 | snake_case_keys(json_body(&mut request).await) |
| 718 | }; |
| 719 | let Some((route, input)) = rest::resolve(method, &path, &query, body) else { |
| 720 | return fail(FailureCode::NotFound, "No such endpoint."); |
| 721 | }; |
| 722 | match audit::run(route.op, &services, &viewer, &input).await? { |
| 723 | // A download is a redirect to its signed link, as GitHub's is: an |
| 724 | // artifact's, and a repository's tarball and zipball. |
| 725 | Outcome::Ok(value) if route.op.redirects() => { |
| 726 | match value["url"].as_str().and_then(|url| worker::Url::parse(url).ok()) { |
| 727 | Some(url) => Response::redirect_with_status(url, 302), |
| 728 | None => reply(&value), |
| 729 | } |
| 730 | } |
| 731 | // A deleted comment has nothing to say, as GitHub's says nothing. |
| 732 | Outcome::Ok(_) if route.no_content() => Ok(Response::empty()?.with_status(204)), |
| 733 | Outcome::Ok(value) => Response::from_json(&wire::snake_case_keeping(value, route.op.as_given())), |
| 734 | // A token without the scope a call needs is told which one. |
| 735 | Outcome::Fail(refused) => match (refused.code, audit::missing_scope(route.op, &viewer, &input)) { |
| 736 | (FailureCode::Forbidden, Some(scope)) => Ok(reply(&json!({ |
| 737 | "error": { |
| 738 | "code": refused.code, |
| 739 | "message": refused.message, |
| 740 | "needed_scope": scope.as_str(), |
| 741 | } |
| 742 | }))? |
| 743 | .with_status(403)), |
| 744 | _ => failure(&refused), |
| 745 | }, |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /// Request bodies take the same keys as the MCP tools, `snake_case`, as |
| 750 | /// responses use; the `camelCase` spelling is accepted too. |
| 751 | fn snake_case_keys(body: Value) -> Value { |
| 752 | let Value::Object(fields) = body else { |
| 753 | return body; |
| 754 | }; |
| 755 | let mut out = serde_json::Map::new(); |
| 756 | for (key, value) in fields { |
| 757 | let mut snake = String::with_capacity(key.len() + 4); |
| 758 | for c in key.chars() { |
| 759 | if c.is_ascii_uppercase() { |
| 760 | snake.push('_'); |
| 761 | snake.push(c.to_ascii_lowercase()); |
| 762 | } else { |
| 763 | snake.push(c); |
| 764 | } |
| 765 | } |
| 766 | // A key given in both spellings keeps the snake_case one. |
| 767 | if snake != key && out.contains_key(&snake) { |
| 768 | continue; |
| 769 | } |
| 770 | out.insert(snake, value); |
| 771 | } |
| 772 | Value::Object(out) |
| 773 | } |
| 774 | |
| 775 | #[cfg(test)] |
| 776 | mod tests { |
| 777 | use super::snake_case_keys; |
| 778 | use serde_json::json; |
| 779 | |
| 780 | #[test] |
| 781 | fn an_unconfirmed_account_may_only_see_itself_and_confirm_its_address() { |
| 782 | assert!(super::pending_may("GET", "/user", false)); |
| 783 | assert!(super::pending_may("GET", "/user/emails/", false)); |
| 784 | assert!(super::pending_may("POST", "/user/emails/confirm", false)); |
| 785 | assert!(!super::pending_may("POST", "/user/emails", false)); |
| 786 | assert!(!super::pending_may("POST", "/workspaces", false)); |
| 787 | assert!(!super::pending_may("GET", "/repos/acme/rocket", false)); |
| 788 | assert!(!super::pending_may("POST", "/user/emails/confirm", true)); |
| 789 | assert!(!super::pending_may("POST", "/", true)); |
| 790 | } |
| 791 | |
| 792 | #[test] |
| 793 | fn a_job_spec_gets_the_toolkits_variables() { |
| 794 | // As the actions service sends it, converted as the API does. |
| 795 | let sent = json!({ "variables": { "GITHUB_SHA": "abc" }, "runtime": { "token": "h.p.s", "idToken": true }, "nextToken": "n" }); |
| 796 | let mut spec = g1t_kit::wire::snake_case_keeping(sent.clone(), super::JOB_SPEC_AS_GIVEN); |
| 797 | super::with_runtime(&mut spec, "https://api.g1t.sh", true); |
| 798 | assert!(spec.get("runtime").is_none(), "the runner never sees it"); |
| 799 | // The token that replaces the one the harness asked with. |
| 800 | assert_eq!(spec["next_token"], "n"); |
| 801 | let vars = &spec["variables"]; |
| 802 | assert_eq!(vars["GITHUB_SHA"], "abc"); |
| 803 | assert_eq!(vars["ACTIONS_RUNTIME_TOKEN"], "h.p.s"); |
| 804 | assert_eq!(vars["ACTIONS_CACHE_URL"], "https://api.g1t.sh/actions/toolkit/"); |
| 805 | assert_eq!(vars["ACTIONS_ID_TOKEN_REQUEST_TOKEN"], "h.p.s"); |
| 806 | // No OIDC key here: no OIDC variables, whatever the job may do. |
| 807 | let mut spec = g1t_kit::wire::snake_case_keeping(sent, super::JOB_SPEC_AS_GIVEN); |
| 808 | super::with_runtime(&mut spec, "https://api.g1t.sh", false); |
| 809 | assert!(spec["variables"].get("ACTIONS_ID_TOKEN_REQUEST_URL").is_none()); |
| 810 | assert_eq!(spec["variables"]["ACTIONS_RESULTS_URL"], "https://api.g1t.sh/"); |
| 811 | } |
| 812 | |
| 813 | #[test] |
| 814 | fn camel_case_keys_are_accepted() { |
| 815 | assert_eq!( |
| 816 | snake_case_keys(json!({ "countAgentApprovals": false, "title": "x" })), |
| 817 | json!({ "count_agent_approvals": false, "title": "x" }) |
| 818 | ); |
| 819 | } |
| 820 | |
| 821 | #[test] |
| 822 | fn snake_case_wins_when_both_are_given() { |
| 823 | assert_eq!( |
| 824 | snake_case_keys(json!({ "keep_issue_open": true, "keepIssueOpen": false })), |
| 825 | json!({ "keep_issue_open": true }) |
| 826 | ); |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | // The API is called from browsers too: the reference's explorer, and apps |
| 831 | // built on g1t. It carries no cookies, so any origin may call it. |
| 832 | /// The signal an OTLP path sends (`/otlp/v1/traces`, `logs` or `metrics`), |
| 833 | /// if it is one. |
| 834 | fn otlp_signal(path: &str) -> Option<&'static str> { |
| 835 | let path = path.strip_prefix("/v1").filter(|rest| rest.starts_with('/')).unwrap_or(path); |
| 836 | match path.trim_end_matches('/') { |
| 837 | "/otlp/v1/traces" => Some("traces"), |
| 838 | "/otlp/v1/logs" => Some("logs"), |
| 839 | "/otlp/v1/metrics" => Some("metrics"), |
| 840 | _ => None, |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | /// OpenTelemetry sent to the API's own address: a self-hosted install's |
| 845 | /// only door, and a second one hosted. It goes to the telemetry service as |
| 846 | /// it came, which checks the project's ingest token itself (not a g1t |
| 847 | /// token), and its answer comes back as it is, CORS headers included. |
| 848 | async fn forward_otlp(mut request: Request, env: &Env, signal: &str) -> Result<Response> { |
| 849 | let method = request.method(); |
| 850 | let headers = worker::Headers::new(); |
| 851 | for name in ["authorization", "x-g1t-token", "content-type", "content-encoding"] { |
| 852 | if let Some(value) = request.headers().get(name)? { |
| 853 | headers.set(name, &value)?; |
| 854 | } |
| 855 | } |
| 856 | let mut init = worker::RequestInit::new(); |
| 857 | init.with_method(method.clone()).with_headers(headers); |
| 858 | if method == Method::Post { |
| 859 | let body = request.bytes().await?; |
| 860 | init.with_body(Some(worker::js_sys::Uint8Array::from(body.as_slice()).into())); |
| 861 | } |
| 862 | let target = format!("https://telemetry/v1/{signal}"); |
| 863 | let mut answer = env.service("TELEMETRY")?.fetch_request(Request::new_with_init(&target, &init)?).await?; |
| 864 | // A fresh response, with the service's headers: a fetched one's cannot |
| 865 | // be changed, and nothing should be added to them. |
| 866 | let status = answer.status_code(); |
| 867 | let headers = worker::Headers::new(); |
| 868 | for (name, value) in answer.headers().entries() { |
| 869 | headers.set(&name, &value)?; |
| 870 | } |
| 871 | let bytes = answer.bytes().await?; |
| 872 | let response = if bytes.is_empty() { Response::empty()? } else { Response::from_bytes(bytes)? }; |
| 873 | Ok(response.with_status(status).with_headers(headers)) |
| 874 | } |
| 875 | |
| 876 | #[event(fetch)] |
| 877 | async fn fetch(request: Request, env: Env, _ctx: Context) -> Result<Response> { |
| 878 | // OTLP passes through untouched, before any g1t token is read. |
| 879 | if let Some(signal) = otlp_signal(&request.path()) { |
| 880 | return forward_otlp(request, &env, signal).await; |
| 881 | } |
| 882 | let mut response = respond(request, &env).await?; |
| 883 | let headers = response.headers_mut(); |
| 884 | headers.set("access-control-allow-origin", "*")?; |
| 885 | headers.set( |
| 886 | "access-control-allow-headers", |
| 887 | "authorization, content-type", |
| 888 | )?; |
| 889 | headers.set("access-control-allow-methods", "GET, POST, PATCH, OPTIONS")?; |
| 890 | headers.set("access-control-expose-headers", "www-authenticate, retry-after")?; |
| 891 | Ok(response) |
| 892 | } |