docs: Enterprise Learning Path & Testing Recipe by Tuntii · Pull Request #121 · Tuntii/RustAPI

Tuntii · 2026-02-13T04:01:55Z

Added "Phase 4: Enterprise Scale" to the Learning Path curriculum. Created a new "Testing Strategies" recipe covering TestClient and MockServer. Updated the "File Uploads" recipe with a complete runnable example and security improvements. Updated summary and run report.

PR created automatically by Jules for task 14429851771554642366 started by @Tuntii

Co-authored-by: Tuntii <121901995+Tuntii@users.noreply.github.com>

google-labs-jules · 2026-02-13T04:01:56Z

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Pull request overview

Adds new cookbook and learning-path documentation aimed at enterprise-scale topics and practical testing/file-upload guidance.

Changes:

Added “Phase 4: Enterprise Scale” modules (Observability, Resilience & Security, High Performance) to the Learning Path curriculum.
Added a new “Testing Strategies” cookbook recipe covering rustapi-testing (TestClient, MockServer).
Reworked the “File Uploads” recipe into a full runnable example and updated cookbook navigation + run tracking.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
docs/cookbook/src/recipes/testing.md	New testing recipe with `TestClient` and `MockServer` examples.
docs/cookbook/src/recipes/file_uploads.md	Expanded file upload recipe into a runnable server example + security guidance.
docs/cookbook/src/learning/curriculum.md	Added Phase 4 enterprise-scale curriculum modules and capstone.
docs/cookbook/src/SUMMARY.md	Added “Testing & Mocking” entry to the cookbook sidebar.
docs/.agent/run_report_2025-02-24.md	Appended run report documenting the new/updated docs content.
docs/.agent/last_run.json	Updated last-run notes summary.

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Copilot · 2026-02-13T04:08:54Z

docs/cookbook/src/recipes/testing.md

+    let response = client.post("/users")
+        .json(&new_user)
+        .send()
+        .await;
+
+    assert_eq!(response.status(), 200);
+
+    let returned_user: User = response.json().await;


This JSON example doesn’t match the current TestClient API: there is no client.post("/users")...send().await, and TestResponse::json() is synchronous and returns Result<T, serde_json::Error>. Consider using client.post_json(...) or client.request(TestRequest::post(...).json(...)) and then response.json().unwrap().

Suggested change

let response = client.post("/users")

.json(&new_user)

.send()

.await;

assert_eq!(response.status(), 200);

let returned_user: User = response.json().await;

let response = client.post_json("/users", &new_user);

assert_eq!(response.status(), 200);

let returned_user: User = response.json().unwrap();

Copilot · 2026-02-13T04:08:54Z

docs/cookbook/src/recipes/file_uploads.md

 use rustapi_rs::prelude::*;
-use rustapi_rs::extract::Multipart;
+use rustapi_rs::extract::{Multipart, DefaultBodyLimit};
 use tokio::fs::File;


rustapi_rs::extract::{Multipart, DefaultBodyLimit} is not a valid import in this repo: Multipart is re-exported from rustapi_core::multipart (and via the prelude), and there is no DefaultBodyLimit type. Update the imports to match the actual public API (e.g., use the prelude and RustApi::body_limit(...) / BodyLimitLayer).

Copilot · 2026-02-13T04:08:54Z

docs/cookbook/src/recipes/file_uploads.md

+    RustApi::new()
+        .route("/upload", post(upload_handler))
+        // Increase body limit to 1GB (default is usually 2MB)
+        .layer(DefaultBodyLimit::max(1024 * 1024 * 1024))
+        .run("127.0.0.1:8080")


The example configures body size with DefaultBodyLimit::max(...), but RustAPI’s API uses RustApi::body_limit(...) (or BodyLimitLayer::new(...)). Also, the comment says the default is “usually 2MB”, but RustAPI’s default body limit is 1MB (DEFAULT_BODY_LIMIT = 1024 * 1024).

Copilot · 2026-02-13T04:08:55Z

docs/cookbook/src/recipes/file_uploads.md

+        // ⚠️ Security: Never trust the user-provided filename directly!
+        // It could contain paths like "../../../etc/passwd".
+        // Always generate a safe filename or sanitize inputs.
+        let safe_filename = format!("{}-{}", uuid::Uuid::new_v4(), file_name);
+        let path = Path::new("./uploads").join(&safe_filename);


Prefixing the user-provided filename with a UUID doesn’t prevent path traversal if the filename contains separators like ../ or \. Use a strict sanitization step (e.g., strip to Path::new(name).file_name() and replace separators) or rely on the built-in MultipartField::save_to(...) / UploadedFile::save_to(...), which sanitizes filenames in rustapi_core.

Copilot · 2026-02-13T04:08:55Z

docs/cookbook/src/recipes/file_uploads.md

+        // Stream the field content chunk-by-chunk
+        // This is memory efficient even for large files.
+        while let Some(chunk) = field.chunk().await.map_err(|_| ApiError::bad_request("Stream error"))? {
+             file.write_all(&chunk).await.map_err(|e| ApiError::internal(e.to_string()))?;
        }


MultipartField in rustapi_core doesn’t provide field.chunk() streaming; fields are buffered and you can read them via field.bytes().await / field.text().await (or save via field.save_to(...)). As written, this loop won’t compile and the surrounding text about streaming is incorrect.

Suggested change

// Stream the field content chunk-by-chunk

// This is memory efficient even for large files.

while let Some(chunk) = field.chunk().await.map_err(|_| ApiError::bad_request("Stream error"))? {

file.write_all(&chunk).await.map_err(|e| ApiError::internal(e.to_string()))?;

}

// Read the entire field content as bytes and write it to disk

let data = field

.bytes()

.await

.map_err(|_| ApiError::bad_request("Read error"))?;

file.write_all(&data)

.await

.map_err(|e| ApiError::internal(e.to_string()))?;

Copilot · 2026-02-13T04:08:55Z

docs/cookbook/src/recipes/testing.md

+    mock_server.expect(
+        rustapi_testing::RequestMatcher::new()
+            .method("GET")
+            .path("/external-data")
+    ).respond_with(
+        MockResponse::new()
+            .status(200)
+            .body(r#"{"data": "mocked"}"#)
+    ).await;
+
+    // 3. Use the mock server's URL in your app configuration
+    let mock_url = mock_server.url("/external-data");
+
+    // Simulating your app logic calling the external service
+    let client = reqwest::Client::new();
+    let res = client.get(&mock_url).send().await.unwrap();
+
+    assert_eq!(res.status(), 200);
+    let body = res.text().await.unwrap();
+    assert_eq!(body, r#"{"data": "mocked"}"#);
+}


The MockServer snippet uses several APIs that don’t exist / have different signatures in rustapi-testing: RequestMatcher::method takes http::Method (not a string), MockResponse::status takes http::StatusCode (not an int), expect(...).respond_with(...) is not async (so no .await), and MockServer exposes base_url() rather than url("/path"). Also, expectations are only asserted when calling mock_server.verify(), so the example should call it before the test ends.

Copilot · 2026-02-13T04:08:55Z

docs/cookbook/src/recipes/testing.md

+You can simulate authenticated requests by setting headers directly on the `TestClient` request builder.
+
+```rust
+#[tokio::test]
+async fn test_protected_route() {
+    let app = RustApi::new().route("/protected", get(protected_handler));
+    let client = TestClient::new(app);
+
+    let response = client.get("/protected")
+        .header("Authorization", "Bearer valid_token")
+        .send()
+        .await;
+


This authenticated-route example uses a request-builder style (client.get(...).header(...).send().await) that doesn’t exist on TestClient. To set headers you need to build a TestRequest (e.g., TestRequest::get(...).header(...)) and pass it to client.request(...).await.

Suggested change

You can simulate authenticated requests by setting headers directly on the `TestClient` request builder.

```rust

#[tokio::test]

async fn test_protected_route() {

let app = RustApi::new().route("/protected", get(protected_handler));

let client = TestClient::new(app);

let response = client.get("/protected")

.header("Authorization", "Bearer valid_token")

.send()

.await;

You can simulate authenticated requests by creating a `TestRequest` with the appropriate headers and sending it through the `TestClient`.

```rust

use rustapi_rs::prelude::*;

use rustapi_testing::{TestClient, TestRequest};

#[tokio::test]

async fn test_protected_route() {

let app = RustApi::new().route("/protected", get(protected_handler));

let client = TestClient::new(app);

let request = TestRequest::get("/protected")

.header("Authorization", "Bearer valid_token");

let response = client.request(request).await;

Copilot · 2026-02-13T04:08:56Z

docs/cookbook/src/recipes/file_uploads.md

 # File Uploads

-Handling file uploads efficiently is crucial. RustAPI allows you to stream `Multipart` data, meaning you can handle 1GB uploads without using 1GB of RAM.
+Handling file uploads efficiently is crucial for modern applications. RustAPI provides a `Multipart` extractor that allows you to stream uploads, enabling you to handle large files (e.g., 1GB+) without consuming proportional RAM.


This introduction claims Multipart streams uploads and can handle 1GB+ without proportional RAM use. The current rustapi_core::multipart::Multipart implementation parses the full request body into memory (and even converts it to a string during parsing), so this claim is inaccurate and could mislead users about memory/DoS characteristics.

Copilot · 2026-02-13T04:08:56Z

docs/cookbook/src/recipes/file_uploads.md

+### 1. Streaming vs Buffering
+By default, some frameworks load the entire file into RAM. RustAPI's `Multipart` allows you to process the stream incrementally using `field.chunk()`.
+- **Buffering**: `field.bytes().await` (Load all into RAM - simple but dangerous for large files)
+- **Streaming**: `field.chunk().await` (Load small chunks - scalable)

-```rust
-use rustapi_rs::extract::DefaultBodyLimit;
+### 2. Body Limits
+The default request body limit is often small (e.g., 2MB) to prevent DoS attacks. You must explicitly increase this limit for file upload routes using `DefaultBodyLimit::max(size)`.



This section refers to field.chunk() streaming and DefaultBodyLimit::max(...), but neither exists in the current RustAPI API. Consider rewriting this to reflect the actual behavior (buffered multipart parsing) and the supported configuration knobs (RustApi::body_limit(...), BodyLimitLayer, and/or documenting MultipartField::save_to filename sanitization).

Copilot · 2026-02-13T04:08:56Z

docs/cookbook/src/recipes/testing.md

+```toml
+[dev-dependencies]
+rustapi-testing = "0.1.335"
+tokio = { version = "1", features = ["full"] }


The dependency list is incomplete for the examples below: the JSON test uses Serialize/Deserialize derives (requires a direct serde dependency with derive feature), and the MockServer example uses reqwest (needs a dev-dependency). Without these, the snippets won’t compile as written.

Suggested change

tokio = { version = "1", features = ["full"] }

tokio = { version = "1", features = ["full"] }

serde = { version = "1", features = ["derive"] }

reqwest = "0.11"

…rprise-and-testing-14429851771554642366 docs: Enterprise Learning Path & Testing Recipe f268d40

docs: add Phase 4 to learning path and create testing recipe

287ab64

Co-authored-by: Tuntii <121901995+Tuntii@users.noreply.github.com>

Copilot AI review requested due to automatic review settings February 13, 2026 04:01

Copilot started reviewing on behalf of Tuntii February 13, 2026 04:02 View session

Copilot AI reviewed Feb 13, 2026

View reviewed changes

Tuntii merged commit f268d40 into main Feb 13, 2026
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github-actions bot pushed a commit that referenced this pull request Feb 13, 2026

Deploy site + cookbook: Merge pull request #121 from Tuntii/docs/ente…

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…rprise-and-testing-14429851771554642366 docs: Enterprise Learning Path & Testing Recipe f268d40

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