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/*! # Taskcluster Client for Rust For a general guide to using Taskcluster clients, see [Calling Taskcluster APIs](https://docs.taskcluster.net/docs/manual/using/api). This client is a convenience wrapper around `reqwest` that provides named functions for each API endpoint and adds functionality such as authentication and retries. # Usage ## Setup Before calling an API end-point, you'll need to build a client, using the [`ClientBuilder`](crate::ClientBuilder) type. This allows construction of a client with only the necessary features, following the builder pattern. You must at least supply a root URL to identify the Taskcluster deployment to which the API calls should be directed. There is a type for each service, e.g., [`Queue`](crate::Queue) and [`Auth`](crate::Auth). Each service type defines functions spepcific to the API endpoints for that service. Each has a `new` associated function that takes an `Into<ClientBuilder>`. As a shortcut, you may pass a string to `new` that will be treated as a root URL. Here is a simple setup and use of an un-authenticated client: ``` # use httptest::{matchers::*, responders::*, Expectation, Server}; # use tokio; # use anyhow::Result; # use serde_json::json; # #[tokio::main] # async fn main() -> Result<()> { # let server = Server::run(); # server.expect( # Expectation::matching(request::method_path("GET", "/api/auth/v1/clients/static%2Ftaskcluster%2Froot")) # .respond_with( # status_code(200) # .append_header("Content-Type", "application/json") # .body("{\"clientId\": \"static/taskcluster/root\"}")) # ); # let root_url = format!("http://{}", server.addr()); use taskcluster::Auth; let auth = Auth::new(root_url)?; let resp = auth.client("static/taskcluster/root").await?; assert_eq!(resp, json!({"clientId": "static/taskcluster/root"})); Ok(()) # } ``` Here is an example with credentials provided, in this case via the [standard environment variables](https://docs.taskcluster.net/docs/manual/design/env-vars). ``` # use httptest::{matchers::*, responders::*, Expectation, Server}; # use tokio; use std::env; # use anyhow::Result; # #[tokio::main] # async fn main() -> Result<()> { # let server = Server::run(); # server.expect( # Expectation::matching(request::method_path("POST", "/api/queue/v1/task/G08bnnBuR6yDhDLJkJ6KiA/cancel")) # .respond_with( # status_code(200) # .append_header("Content-Type", "application/json") # .body("{\"status\": \"...\"}")) # ); # env::set_var("TASKCLUSTER_ROOT_URL", format!("http://{}", server.addr())); # env::set_var("TASKCLUSTER_CLIENT_ID", "a-client"); # env::set_var("TASKCLUSTER_ACCESS_TOKEN", "a-token"); use taskcluster::{ClientBuilder, Queue, Credentials}; let creds = Credentials::from_env()?; let root_url = env::var("TASKCLUSTER_ROOT_URL").unwrap(); let client = Queue::new(ClientBuilder::new(&root_url).credentials(creds))?; let res = client.cancelTask("G08bnnBuR6yDhDLJkJ6KiA").await?; println!("{}", res.get("status").unwrap()); Ok(()) # } ``` ### Authorized Scopes If you wish to perform requests on behalf of a third-party that has smaller set of scopes than you do, you can specify [which scopes your request should be allowed to use](https://docs.taskcluster.net/docs/manual/design/apis/hawk/authorized-scopes). These "authorized scopes" are configured on the client: ``` # use httptest::{matchers::*, responders::*, Expectation, Server}; # use tokio; use std::env; use serde_json::json; # use anyhow::Result; # #[tokio::main] # async fn main() -> Result<()> { # let server = Server::run(); # server.expect( # Expectation::matching(request::method_path("PUT", "/api/queue/v1/task/G08bnnBuR6yDhDLJkJ6KiA")) # .respond_with( # status_code(200) # .append_header("Content-Type", "application/json") # .body("{\"taskId\": \"...\"}")) # ); # env::set_var("TASKCLUSTER_ROOT_URL", format!("http://{}", server.addr())); # env::set_var("TASKCLUSTER_CLIENT_ID", "a-client"); # env::set_var("TASKCLUSTER_ACCESS_TOKEN", "a-token"); use taskcluster::{ClientBuilder, Queue, Credentials}; let creds = Credentials::from_env()?; let root_url = env::var("TASKCLUSTER_ROOT_URL").unwrap(); let client = Queue::new( ClientBuilder::new(&root_url) .credentials(creds) .authorized_scopes(vec!["just:one-scope"]))?; # let task = json!({}); let res = client.createTask("G08bnnBuR6yDhDLJkJ6KiA", &task).await?; Ok(()) # } ``` ## Calling API Methods API methods are available as methods on the corresponding client object. They are capitalized in snakeCase (e.g., `createTask`) to match the Taskcluster documentation. Each method takes arguments in the following order, where appropriate to the method: * Positional arguments (strings interpolated into the URL) * Request body (payload) * URL query arguments The payload comes in the form of a `serde_json::Value`, the contents of which should match the API method's input schema. URL query arguments are all optional. For example, the following lists all Auth clients: ``` # // note: pagination is more thoroughly tested in `tests/against_real_deployment.rs` # use httptest::{matchers::*, responders::*, Expectation, Server}; # use tokio; # use std::env; # use anyhow::Result; # #[tokio::main] # async fn main() -> Result<()> { # let server = Server::run(); # server.expect( # Expectation::matching(request::method_path("GET", "/api/auth/v1/clients/")) # .respond_with( # status_code(200) # .append_header("Content-Type", "application/json") # .body("{\"clients\": []}")) # ); # let root_url = format!("http://{}", server.addr()); use taskcluster::{Auth, ClientBuilder, Credentials}; let auth = Auth::new(ClientBuilder::new(&root_url))?; let mut continuation_token: Option<String> = None; let limit = Some("10"); loop { let res = auth .listClients(None, continuation_token.as_deref(), limit) .await?; for client in res.get("clients").unwrap().as_array().unwrap() { println!("{:?}", client); } if let Some(v) = res.get("continuationToken") { continuation_token = Some(v.as_str().unwrap().to_owned()); } else { break; } } # Ok(()) # } ``` ### Error Handling All 5xx (server error) responses are automatically retried. All 4xx (client error) responses are converted to `Result::Err`. All other responses are treated as successful responses. Note that this includes 3xx (redirection) responses; the client does not automatically follow such redirects. Client methods return `anyhow::Error`, but this can be downcast to a `reqwest::Error` if needed. As a shortcut for the common case of getting the HTTP status code for an error, use [`err_status_code`](crate::err_status_code). The `reqwest::StatusCode` type that this returns is re-exported from this crate. ### Low-Level Access Instead of using service-specific types, it is possible to call API methods directly by path, using the [`Client`](crate::Client) type: ``` # use httptest::{matchers::*, responders::*, Expectation, Server}; # use tokio; use std::env; # use anyhow::Result; # #[tokio::main] # async fn main() -> Result<()> { # let server = Server::run(); # server.expect( # Expectation::matching(request::method_path("POST", "/api/queue/v1/task/G08bnnBuR6yDhDLJkJ6KiA/cancel")) # .respond_with(status_code(200)) # ); # env::set_var("TASKCLUSTER_ROOT_URL", format!("http://{}", server.addr())); # env::set_var("TASKCLUSTER_CLIENT_ID", "a-client"); # env::set_var("TASKCLUSTER_ACCESS_TOKEN", "a-token"); use taskcluster::{ClientBuilder, Credentials}; let creds = Credentials::from_env()?; let root_url = env::var("TASKCLUSTER_ROOT_URL").unwrap(); let client = ClientBuilder::new(&root_url).credentials(creds).build()?; let resp = client.request("POST", "api/queue/v1/task/G08bnnBuR6yDhDLJkJ6KiA/cancel", None, None).await?; assert!(resp.status().is_success()); # Ok(()) # } ``` ## Generating URLs To generate a unsigned URL for an API method, use `<method>_url`: ``` # use anyhow::Result; # fn main() -> Result<()> { use taskcluster::{Auth, ClientBuilder}; # use std::env; # env::set_var("TASKCLUSTER_ROOT_URL", "https://tc-tests.example.com"); let root_url = env::var("TASKCLUSTER_ROOT_URL").unwrap(); let auth = Auth::new(ClientBuilder::new(&root_url))?; let url = auth.listClients_url(Some("static/"), None, None)?; assert_eq!(url, "https://tc-tests.example.com/api/auth/v1/clients/?prefix=static%2F".to_owned()); # Ok(()) # } ``` ## Generating Temporary Credentials The [`create_named_temp_creds`](crate::Credentials::create_named_temp_creds) method creates temporary credentials: ``` use std::env; use std::time::Duration; # use anyhow::Result; # fn main() -> Result<()> { # env::set_var("TASKCLUSTER_CLIENT_ID", "a-client"); # env::set_var("TASKCLUSTER_ACCESS_TOKEN", "a-token"); use taskcluster::Credentials; let creds = Credentials::from_env()?; let temp_creds = creds.create_named_temp_creds( "new-client-id", Duration::from_secs(3600), vec!["scope1", "scope2"])?; assert_eq!(temp_creds.client_id, "new-client-id"); # Ok(()) # } ``` There is also a `create_temp_creds` method which creates unamed temporary credentials, but its use is not recommended. ## Generating SlugIDs Use the [slugid](https://crates.io/crates/slugid) crate to create slugIds (such as for a taskId). */ mod client; mod credentials; mod generated; mod util; pub use client::{Client, ClientBuilder, Retry}; pub use credentials::Credentials; pub use generated::*; pub use reqwest::StatusCode; pub use util::err_status_code;