Caddy setup to run tester tests against #69
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WalkthroughA comprehensive set of changes has been applied across multiple parts of the project. The updates include upgrading CI/CD workflows (GitHub Actions and Go versions), introducing new Docker and Caddy configurations, and adding several new test targets and utilities. Significant refactoring has been performed in the internal packages to streamline logger usage, improve error handling via idiomatic patterns, and add helper functions for HTTP request/response generation and persistent connection testing. New documentation and test scenarios for HTTP persistence have also been added alongside enhanced Python server scripts. Changes
Sequence Diagram(s)sequenceDiagram
participant TH as Test Harness
participant PC as Persistent Connection
participant Srv as HTTP Server
TH->>PC: assertConnectionIsOpen()
alt Connection Open
TH->>Srv: Send HTTP Request
Srv-->>PC: Process Request
PC-->>TH: Return Response
else Connection Closed
TH->>TH: Log error and abort
end
TH->>PC: Close Connection
Poem
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Actionable comments posted: 19
🧹 Nitpick comments (27)
flakiness.sh (1)
3-11: Improve Error Handling and Readability in LoopConsider refactoring the error checking to simplify the logic. For example, combining the command execution and its error check improves readability. Additionally, adding a newline at the end of the file is a best practice.
Suggested diff:- for i in $(seq 1 100) - do - echo "Running iteration $i" - make test_persistence_pass > /tmp/test - if [ $? -ne 0 ]; then - echo "make test_persistence_pass failed on iteration $i" - exit 1 - fi - done + for i in $(seq 1 100); do + echo "Running iteration $i" + if ! make test_persistence_pass > /tmp/test; then + echo "make test_persistence_pass failed on iteration $i" + exit 1 + fi + doneinternal/test_helpers/course_definition.yml (1)
752-754: New Stage Entries and Newline at EOFThe new stage entries (
pe1,pe2,pe3) are added as minimal identifiers, which appears intentional for future expansion and testing integration. Please ensure these entries align with the expected schema in the overall course configuration.
Additionally, YAMLlint reports a missing newline at the end of file. Adding a newline will help avoid trivial parsing issues in some environments.
Suggested fix for the newline issue:- - slug: "pe3" \ No newline at end of file + - slug: "pe3" +🧰 Tools
🪛 YAMLlint (1.35.1)
[error] 754-754: no new line character at the end of file
(new-line-at-end-of-file)
internal/http/connection/curl_string.go (1)
27-36: Function naming convention could be improvedAccording to Go's naming conventions, acronyms in function names should be capitalized. Consider renaming
HttpKeepAliveRequestToCurlStringtoHTTPKeepAliveRequestToCurlString.-func HttpKeepAliveRequestToCurlString(requests []*http.Request) string { +func HTTPKeepAliveRequestToCurlString(requests []*http.Request) string {internal/test_helpers/fixtures/persistence/pass_all (1)
1-1: Consider making debug logging configurable.
Currently, "Debug = true" is hard-coded at line 1, which might lead to excessive logging in production. Use an environment variable or a configuration setting to control debug logs.-Debug = true +# Debug logging can be toggled via an environment variable or configuration +Debug = os.getenv("DEBUG_MODE", "false").lower() == "true"persistence.md (1)
83-83: Use more precise language instead of "very."
Remove the intensifier "very" and opt for clearer phrasing to maintain concise technical documentation.-... RFCs disagree and make it very clear ... +... RFCs disagree and clarify it ...🧰 Tools
🪛 LanguageTool
[style] ~83-~83: As an alternative to the over-used intensifier ‘very’, consider replacing this phrase.
Context: ...in pipelines, RFCs disagree and make it very clear) [3](https://www.rfc-editor.org/rfc/rfc...(EN_WEAK_ADJECTIVE)
internal/test_helpers/scenarios/pass_all/app/main.py (2)
135-135: Allow a configurable timeout.
Hardcoding the timeout to 5 seconds can cause issues for long-running requests or large file uploads. Consider making this timeout configurable via an environment variable or command-line argument to accommodate different usage scenarios.-connection.settimeout(5) +import os +timeout = int(os.getenv("SERVER_TIMEOUT", "5")) +connection.settimeout(timeout)
197-200: Handle unknown errors by returning an HTTP 500 response.
Instead of just printing the error and closing the connection, consider sending a 500 Internal Server Error response to inform the client that the server encountered an unexpected exception.-except Exception as e: - print(f"Error handling request: {e}") - break +except Exception as e: + print(f"Error handling request: {e}") + error_response = Response( + status=HTTPStatus.INTERNAL_SERVER_ERROR, + data="Server encountered an internal error", + headers={"Connection": "close"} + ) + connection.send(bytes(error_response)) + breakinternal/utils.go (1)
15-20: Consider returning an error instead of panickingThe
setupDataDirectoryfunction currently panics if it encounters an error when creating the directory. This approach might interrupt the normal flow of the program and make error recovery difficult. Consider returning an error instead, allowing the caller to decide how to handle the failure.-func setupDataDirectory() { +func setupDataDirectory() error { err := os.MkdirAll(DATA_DIR, 0755) if err != nil { - panic(err) + return fmt.Errorf("failed to create data directory: %w", err) } + return nil }internal/test_helpers/scenarios/python_builtin/codecrafters.yml (1)
1-11: Consider setting debug to false by defaultWhile having debug enabled is helpful during development, it might be better to set it to false by default to avoid verbose logs in normal operation, as mentioned in your own comments. Users can still enable it when needed.
# Set this to true if you want debug logs. # # These can be VERY verbose, so we suggest turning them off # unless you really need them. -debug: true +debug: false # Use this to change the Python version used to run your code # on Codecrafters. # # Available versions: python-3.12 language_pack: python-3.12docker-compose.yml (2)
1-12: Compose file looks good, with minor formatting issuesThe Docker Compose file is well-structured, defining a Caddy service with appropriate port mappings and volume mounts. However, there are two minor issues to fix:
- There's a trailing space at the end of line 12
- The file is missing a newline character at the end
version: '3.8' services: caddy: build: . ports: - "4221:4221" - "4222:4222" volumes: - ./Caddyfile:/etc/caddy/Caddyfile - /tmp/data/codecrafters.io/http-server-tester/:/tmp/data/codecrafters.io/http-server-tester - restart: unless-stopped + restart: unless-stopped +🧰 Tools
🪛 YAMLlint (1.35.1)
[error] 12-12: no new line character at the end of file
(new-line-at-end-of-file)
[error] 12-12: trailing spaces
(trailing-spaces)
11-11: Consider using named volumes for persistenceThe current setup uses a host path volume for data. For better portability and to follow Docker best practices, consider using named volumes instead.
volumes: - ./Caddyfile:/etc/caddy/Caddyfile - - /tmp/data/codecrafters.io/http-server-tester/:/tmp/data/codecrafters.io/http-server-tester + - http_server_data:/tmp/data/codecrafters.io/http-server-tester +volumes: + http_server_data:Dockerfile (1)
17-17: Consider Robust Process Management for Concurrent ServicesCurrently, the Dockerfile’s CMD runs the Python file_writer and the Caddy server concurrently using a background process. This approach may hide failures if the Python process crashes. It is recommended to use a dedicated startup script (or process manager) that properly manages both processes (e.g., capturing exit codes, logging errors) and ensures reliable service startup.
For example, you might create a
start.shscript:- CMD sh -c "python3 /file_writer.py & caddy run --config /etc/caddy/Caddyfile" + COPY start.sh /start.sh + RUN chmod +x /start.sh + CMD ["/start.sh"]And a sample
start.sh:#!/bin/sh python3 /file_writer.py & caddy run --config /etc/caddy/Caddyfile waitcurl-logs.md (2)
1-1: Verify Duplicate URL in Curl CommandThe curl invocation on line 1 shows the URL repeated:
curl --http1.1 -v http://localhost:4221/ http://localhost:4221/If the duplicate URL is not intentional, consider removing the repetition. Please confirm if this is intended for testing or if it should be corrected.
- curl --http1.1 -v http://localhost:4221/ http://localhost:4221/ + curl --http1.1 -v http://localhost:4221/🧰 Tools
🪛 LanguageTool
[duplication] ~1-~1: Possible typo: you repeated a word.
Context: curl --http1.1 -v http://localhost:4221/ http://localhost:4221/ * Host localhost:4221 was resolved. * I...(ENGLISH_WORD_REPEAT_RULE)
🪛 markdownlint-cli2 (0.17.2)
1-1: Bare URL used
null(MD034, no-bare-urls)
1-1: Bare URL used
null(MD034, no-bare-urls)
41-44: Consider Using Markdown Link Syntax for URLsThe endpoints listed (lines 41–44) are bare URLs, which trigger markdownlint MD034 warnings. For clarity and to conform with best markdown practices, consider wrapping these URLs in angle brackets or using markdown link syntax.
For example:
-$ curl -v http://localhost:4221/echo/orange +$ curl -v <http://localhost:4221/echo/orange>🧰 Tools
🪛 markdownlint-cli2 (0.17.2)
41-41: Bare URL used
null(MD034, no-bare-urls)
43-43: Bare URL used
null(MD034, no-bare-urls)
44-44: Bare URL used
null(MD034, no-bare-urls)
internal/test_helpers/scenarios/pass_base/README.md (1)
7-7: Grammar correction needed: "an HTTP/1.1" instead of "a HTTP/1.1"Since "HTTP" is pronounced with a vowel sound at the beginning (aitch-tee-tee-pee), it should be preceded by "an" rather than "a".
- protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server + protocol that powers the web. In this challenge, you'll build an HTTP/1.1 server🧰 Tools
🪛 LanguageTool
[misspelling] ~7-~7: Use “an” instead of ‘a’ if the following word starts with a vowel sound, e.g. ‘an article’, ‘an hour’.
Context: ...he web. In this challenge, you'll build a HTTP/1.1 server that is capable of serv...(EN_A_VS_AN)
internal/test_helpers/scenarios/python_builtin/README.md (1)
7-7: Grammar correction needed: "an HTTP/1.1" instead of "a HTTP/1.1"Since "HTTP" is pronounced with a vowel sound at the beginning (aitch-tee-tee-pee), it should be preceded by "an" rather than "a".
- protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server + protocol that powers the web. In this challenge, you'll build an HTTP/1.1 server🧰 Tools
🪛 LanguageTool
[misspelling] ~7-~7: Use “an” instead of ‘a’ if the following word starts with a vowel sound, e.g. ‘an article’, ‘an hour’.
Context: ...he web. In this challenge, you'll build a HTTP/1.1 server that is capable of serv...(EN_A_VS_AN)
internal/stages_test.go (1)
54-56: Consider implementing the TODO soonThe TODO comment suggests a valuable refactoring to organize tests into categories (base, compression, persistence). This would improve test organization and maintainability.
Consider implementing this refactoring in a follow-up PR to keep the test structure consistent with the new categorization you're introducing.
file_writer.py (1)
36-39: Consider adding signal handling for graceful shutdownFor a server process that might run for a long time, it's good practice to add signal handling for graceful shutdown.
+ import signal + if __name__ == '__main__': server = HTTPServer(('localhost', 4222), FileWriterHandler) print("Starting file writer server on port 4222...") - server.serve_forever() + try: + server.serve_forever() + except KeyboardInterrupt: + print("Shutting down file writer server...") + server.server_close()internal/stage_14.go (1)
69-77: Immediate closure checks may cause race conditions.
You’re checkingconnections[i].IsOpen()immediately after sending requests. If the server closes the connection slightly later (e.g., asynchronously), this check might fail intermittently. Consider introducing a brief wait or a retry to handle delayed closure.internal/stage_12.go (5)
13-13: Make sure this TODO is addressed before finalizing.The comment indicates a need for better emulated curl logs. Consider adding this to your planned follow-up tasks.
47-49: Use more descriptive logging for request sets.The current logging only mentions "first set of requests" without additional context. This could make debugging difficult.
-logger.Debugf("Sending first set of requests") +logger.Debugf("Sending first set of requests (total: %d) to test HTTP persistence", uniqueRequestCount)
55-57: Use more descriptive logging for request sets.Similar to the first request set, add more context to the logging.
-logger.Debugf("Sending second set of requests") +logger.Debugf("Sending second set of requests on the same connection to verify persistence")
58-58: Move the connection reuse message outside the loop.This debug message is printed for every request in the loop, but it would be more appropriate as a one-time message before the loop starts.
- for _, testCase := range testCases { - logger.Debugf("* Re-using existing connection with host localhost") + logger.Debugf("* Re-using existing connection with host localhost") + for _, testCase := range testCases {
64-68: Use more idiomatic Go error handling.The current implementation checks for an error, logs it, and then returns it. This can be simplified.
- err = connection.Close() - if err != nil { - logFriendlyError(logger, err) - return err - } + if err = connection.Close(); err != nil { + logFriendlyError(logger, err) + return err + }internal/http/connection/connection.go (1)
201-208: Consider returning the error for diagnostic purposes.The current implementation discards the error information when a connection is closed. It might be helpful to return both the boolean status and the error for better diagnostics.
You could modify the method signature to
func (c *HttpConnection) IsOpen() (bool, error)and return the error along with the boolean status. This would provide more context when diagnosing connection issues.internal/test_helpers/scenarios/pass_base/app/main.py (1)
175-184: Verify thread-based concurrency approach.The server spawns a new thread for each client connection without restricting or managing the thread count. For a large number of incoming connections, this can lead to resource exhaustion. Consider using a thread pool or an asynchronous I/O approach to handle concurrent requests more efficiently.
internal/http_messages.go (1)
181-181: Re-evaluate commented-out code for files endpoint testing.The function call to
GetFilesRequestResponsePairis commented out but might be useful to expand coverage tests. If this endpoint should be tested randomly, consider uncommenting and verifying interface consistency.
🛑 Comments failed to post (19)
internal/test_helpers/scenarios/pass_base/your_server.sh (1)
8-9: 💡 Verification agent
❓ Verification inconclusive
Enhance CD Command Robustness
Shellcheck has flagged the
cdcommand on line 8. To prevent potential issues (such as a failingcdor word splitting), please update it to handle errors and quote the directory path.
Suggested change:- cd $(dirname $0) + cd "$(dirname "$0")" || exit
Enhance CD Command Robustness
The current use of:
cd $(dirname $0)is prone to word splitting and does not handle failure if the directory change fails. Please update it to:
- cd $(dirname $0) + cd "$(dirname "$0")" || exitThis ensures that the directory path is properly quoted, and the script exits if the
cdcommand fails.🧰 Tools
🪛 Shellcheck (0.10.0)
[warning] 8-8: Use 'cd ... || exit' or 'cd ... || return' in case cd fails.
(SC2164)
[warning] 8-8: Quote this to prevent word splitting.
(SC2046)
internal/test_helpers/scenarios/pass_all/your_server.sh (1)
8-13:
⚠️ Potential issueFix the Docker Compose pipeline failure
The Docker Compose approach is causing a pipeline failure because the command is not available in the CI environment. According to the error logs: "docker-compose: not found. Failed to create connection: dial tcp [::1]:4221: connect: connection refused."
You have a few options to fix this:
- Ensure Docker Compose is installed in your CI environment
- Add error handling to handle the case when Docker Compose isn't available
- Provide an alternative fallback mechanism to start the server
-docker-compose up --build +if command -v docker-compose &> /dev/null; then + docker-compose up --build +else + echo "docker-compose not found, falling back to Python server" + cd $(dirname $0) + exec python3 -m app.main "$@" +fi📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.# cd $(dirname $0) # exec python3 -m app.main "$@" if command -v docker-compose &> /dev/null; then docker-compose up --build else echo "docker-compose not found, falling back to Python server" cd $(dirname $0) exec python3 -m app.main "$@" fi # And then run make test. # This script would do nothing, just start and end tests.🧰 Tools
🪛 GitHub Actions: Test
[error] 11-11: docker-compose: not found. Failed to create connection: dial tcp [::1]:4221: connect: connection refused.
Caddyfile (1)
32-39: 💡 Verification agent
❓ Verification inconclusive
Consider documenting the service on port 4222
The configuration forwards POST requests to port 4222, but it's not clear what service is expected to run on this port. Consider adding documentation about this service requirement, either in the Caddyfile comments or in a README.
🏁 Script executed:
#!/bin/bash # Check if there's any mention of the port 4222 service in the repository grep -r "4222" --include="*.{md,py,go,yml,yaml}" .Length of output: 50
Documentation Required for the Service on Port 4222
Our search for “4222” across documentation files (e.g. Markdown, YAML) returned no results. This indicates that the expected service (the local file-writing server forwarded to on port 4222) isn’t documented anywhere in the repository. Please add a clear note—either as an inline comment in the Caddyfile or in the project’s README—explaining what service is expected on port 4222, its responsibilities, and how it integrates with the rest of the system.
- Caddyfile (lines 32–39):
- The config forwards POST requests to
localhost:4222.- Action: Document the service requirements and its purpose to avoid future confusion.
internal/test_helpers/scenarios/pass_all/app/main.py (1)
195-196: 🛠️ Refactor suggestion
Return an HTTP 408 response on socket timeout.
Currently, the code silently closes the connection on timeout. Returning a 408 (Request Timeout) provides more informative feedback to the client.-except socket.timeout: - break +except socket.timeout: + timeout_response = Response( + status=HTTPStatus.REQUEST_TIMEOUT, + data="Request timed out", + headers={"Connection": "close"}, + ) + connection.send(bytes(timeout_response)) + break📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.except socket.timeout: - # Connection timed out, break the loop - break + timeout_response = Response( + status=HTTPStatus.REQUEST_TIMEOUT, + data="Request timed out", + headers={"Connection": "close"}, + ) + connection.send(bytes(timeout_response)) + breakinternal/utils.go (7)
60-66: 🛠️ Refactor suggestion
Avoid capturing loop variables in closures
The callback function captures the loop variable
iin a closure. This can lead to unexpected behavior in Go as all closures will see the same final value ofi. Use a local variable inside the loop to capture the correct value.- conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { + connIndex := i // Capture the current value of i + conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") - stageHarness.Logger.Debugf("* Connection #%d to host localhost left intact", i) + stageHarness.Logger.Debugf("* Connection #%d to host localhost left intact", connIndex) }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.connIndex := i // Capture the current value of i conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") stageHarness.Logger.Debugf("* Connection #%d to host localhost left intact", connIndex) }
22-44:
⚠️ Potential issueFix nil pointer dereference by checking error immediately after connection creation
There's a critical issue in your function logic. You're modifying
conn.Callbacksbefore checking ifconnis nil. This is causing the nil pointer dereference observed in the pipeline failure. Move the error checking right after creating the connection.func spawnPersistentConnection(stageHarness *test_case_harness.TestCaseHarness, logger *logger.Logger) (*http_connection.HttpConnection, error) { logger.Debugf("Creating connection") conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, "") + if err != nil { + logFriendlyError(logger, err) + return nil, err + } // We want to log all the requests at once, not one by one // Note: No support for logPrefix here conn.Callbacks.BeforeSendRequest = nil conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") stageHarness.Logger.Debugf("* Connection #0 to host localhost left intact") } - if err != nil { - logFriendlyError(logger, err) - return nil, err - } return conn, nil }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.func spawnPersistentConnection(stageHarness *test_case_harness.TestCaseHarness, logger *logger.Logger) (*http_connection.HttpConnection, error) { logger.Debugf("Creating connection") conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, "") if err != nil { logFriendlyError(logger, err) return nil, err } // We want to log all the requests at once, not one by one // Note: No support for logPrefix here conn.Callbacks.BeforeSendRequest = nil conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") stageHarness.Logger.Debugf("* Connection #0 to host localhost left intact") } return conn, nil }🧰 Tools
🪛 GitHub Actions: Test
[error] 29-29: panic: runtime error: invalid memory address or nil pointer dereference.
78-78:
⚠️ Potential issueFix incorrect range loop syntax
Similar to the issue in
spawnPersistentConnections, usingrangewith an integer is incorrect. Change to a traditional for loop.- for i := range connectionCount { + for i := 0; i < connectionCount; i++ {📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.for i := 0; i < connectionCount; i++ {
46-72: 🛠️ Refactor suggestion
Implement proper resource cleanup on error
If an error occurs while creating connections, the function should close all previously created connections before returning. Otherwise, this could lead to resource leaks.
func spawnPersistentConnections(stageHarness *test_case_harness.TestCaseHarness, connectionCount int, logger *logger.Logger) ([]*http_connection.HttpConnection, error) { logger.Debugf("Creating %d persistent connections", connectionCount) connections := make([]*http_connection.HttpConnection, connectionCount) for i := 0; i < connectionCount; i++ { conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, fmt.Sprintf("client-%d", i+1)) if err != nil { logFriendlyError(logger, err) + // Close all previously created connections + for j := 0; j < i; j++ { + if connections[j] != nil { + connections[j].Conn.Close() + } + } return nil, err } // We want to log all the requests at once, not one by one // Note: No support for logPrefix here conn.Callbacks.BeforeSendRequest = nil conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") stageHarness.Logger.Debugf("* Connection #%d to host localhost left intact", i) } connections[i] = conn } return connections, nil }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.func spawnPersistentConnections(stageHarness *test_case_harness.TestCaseHarness, connectionCount int, logger *logger.Logger) ([]*http_connection.HttpConnection, error) { logger.Debugf("Creating %d persistent connections", connectionCount) connections := make([]*http_connection.HttpConnection, connectionCount) for i := 0; i < connectionCount; i++ { conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, fmt.Sprintf("client-%d", i+1)) if err != nil { logFriendlyError(logger, err) // Close all previously created connections for j := 0; j < i; j++ { if connections[j] != nil { connections[j].Conn.Close() } } return nil, err } // We want to log all the requests at once, not one by one // Note: No support for logPrefix here conn.Callbacks.BeforeSendRequest = nil conn.Callbacks.AfterReadResponse = func(response http_parser.HTTPResponse) { for _, line := range strings.Split(strings.TrimSpace(response.FormattedString()), "\r\n") { stageHarness.Logger.Debugf("%s%s", "< ", line) } stageHarness.Logger.Debugf("%s%s", "< ", "") stageHarness.Logger.Debugf("* Connection #%d to host localhost left intact", i) } connections[i] = conn } return connections, nil }
50-50:
⚠️ Potential issueFix incorrect range loop syntax
The current loop syntax is incorrect. When using
rangewith an integer, Go expects a slice, array, map, string, or channel to iterate over, not a single integer value. You should use a traditional for loop here.- for i := range connectionCount { + for i := 0; i < connectionCount; i++ {📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.for i := 0; i < connectionCount; i++ {
38-41: 💡 Verification agent
🧩 Analysis chain
Consider adding a reference to
logFriendlyErrorThe function
logFriendlyErroris called but not defined in this file. Make sure this function is properly defined elsewhere or add a comment to indicate where it's defined to improve code readability.
🏁 Script executed:
#!/bin/bash # Check if logFriendlyError function is defined somewhere in the codebase rg -A 2 -B 2 "func logFriendlyError" --type goLength of output: 408
Action Required: Add a Clarifying Comment for logFriendlyError Reference
The function
logFriendlyErroris indeed defined ininternal/log_friendly_error.go. To improve code readability, please add an inline comment at its call site ininternal/utils.go(around lines 38–41) indicating that its definition can be found ininternal/log_friendly_error.go.
- Location:
internal/utils.go, lines 38–41- Suggestion: Add a comment such as:
// logFriendlyError is defined in internal/log_friendly_error.go if err != nil { logFriendlyError(logger, err) return nil, err }
74-88: 🛠️ Refactor suggestion
Implement proper resource cleanup on error
Similar to the issue in
spawnPersistentConnections, you should close any previously created connections when an error occurs.func spawnConnections(stageHarness *test_case_harness.TestCaseHarness, connectionCount int, logger *logger.Logger) ([]*http_connection.HttpConnection, error) { logger.Infof("Creating %d parallel connections", connectionCount) connections := make([]*http_connection.HttpConnection, connectionCount) for i := 0; i < connectionCount; i++ { logger.Debugf("Creating connection %d", i+1) conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, fmt.Sprintf("client-%d", i+1)) if err != nil { logFriendlyError(logger, err) + // Close all previously created connections + for j := 0; j < i; j++ { + if connections[j] != nil { + connections[j].Conn.Close() + } + } return nil, err } connections[i] = conn } return connections, nil }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.func spawnConnections(stageHarness *test_case_harness.TestCaseHarness, connectionCount int, logger *logger.Logger) ([]*http_connection.HttpConnection, error) { logger.Infof("Creating %d parallel connections", connectionCount) connections := make([]*http_connection.HttpConnection, connectionCount) for i := 0; i < connectionCount; i++ { logger.Debugf("Creating connection %d", i+1) conn, err := http_connection.NewInstrumentedHttpConnection(stageHarness, TCP_DEST, fmt.Sprintf("client-%d", i+1)) if err != nil { logFriendlyError(logger, err) // Close all previously created connections for j := 0; j < i; j++ { if connections[j] != nil { connections[j].Conn.Close() } } return nil, err } connections[i] = conn } return connections, nil }internal/test_helpers/scenarios/python_builtin/your_server.sh (1)
8-8: 🛠️ Refactor suggestion
Enhance Directory Change Robustness
The current
cd $(dirname $0)may fail silently if the directory change is unsuccessful. It is recommended to quote the command and add error handling to prevent unexpected behavior.-cd $(dirname $0) +cd "$(dirname "$0")" || { echo "Failed to change directory"; exit 1; }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.cd "$(dirname "$0")" || { echo "Failed to change directory"; exit 1; }🧰 Tools
🪛 Shellcheck (0.10.0)
[warning] 8-8: Use 'cd ... || exit' or 'cd ... || return' in case cd fails.
(SC2164)
[warning] 8-8: Quote this to prevent word splitting.
(SC2046)
file_writer.py (1)
5-35:
⚠️ Potential issueAdd path traversal protection for the file handler
The current implementation accepts any filename from the path without validation, which could lead to path traversal vulnerabilities if a request contains paths like
../../../etc/passwd.Add validation to ensure the filename doesn't contain path traversal sequences:
- filename = self.path.lstrip('/') + filename = self.path.lstrip('/') + # Prevent path traversal attacks + if '..' in filename or filename.startswith('/'): + self.send_response(400) + self.end_headers() + self.wfile.write(b"Invalid filename") + return📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.class FileWriterHandler(BaseHTTPRequestHandler): def do_POST(self): try: # Get the filename from the path filename = self.path.lstrip('/') # Prevent path traversal attacks if '..' in filename or filename.startswith('/'): self.send_response(400) self.end_headers() self.wfile.write(b"Invalid filename") return if not filename: self.send_response(400) self.end_headers() return # Get the content length content_length = int(self.headers['Content-Length']) # Read the request body data = self.rfile.read(content_length) # Write to file filepath = os.path.join('/tmp/data/codecrafters.io/http-server-tester', filename) os.makedirs(os.path.dirname(filepath), exist_ok=True) with open(filepath, 'wb') as f: f.write(data) self.send_response(201) self.end_headers() except Exception as e: print(f"Error: {e}", file=sys.stderr) self.send_response(500) self.end_headers()internal/stage_13.go (1)
62-67:
⚠️ Potential issueFix the loop logic for sending the second set of requests.
The loopfor i := range connectionCount { ... }will not compile becauserangecannot iterate over an integer in Go. Replace it with a standard for loop.Apply the following diff to fix this bug:
-for i := range connectionCount { +for i := 0; i < connectionCount; i++ {📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.for i := 0; i < connectionCount; i++ { logger.Debugf("* Re-using existing connection with host localhost") if err := testCases[i].RunWithConn(connections[i], logger); err != nil { return err } }internal/stage_14.go (1)
58-67:
⚠️ Potential issueFix the integer iteration in the range loop.
Similar totestPersistence2, the loopfor i := range uniqueRequestCount { ... }will not compile. Replace with a standard for loop.-for i := range uniqueRequestCount { +for i := 0; i < uniqueRequestCount; i++ {📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.logger.Debugf("Sending first set of requests to connection #0") for i := 0; i < uniqueRequestCount; i++ { if err := testCases[i].RunWithConn(connections[0], logger); err != nil { return err } } if connections[0].IsOpen() { return fmt.Errorf("connection is still open") }internal/stage_12.go (1)
42-42:
⚠️ Potential issueFix the panic in spawnPersistentConnection call.
The pipeline failure indicates a panic at this line. The
spawnPersistentConnectionfunction appears to be missing or improperly implemented, which is causing the test to fail.Ensure the
spawnPersistentConnectionfunction is properly defined in this package or imported from another package. The function should establish and return a persistent HTTP connection for testing purposes.🧰 Tools
🪛 GitHub Actions: Test
[error] 42-42: Test failed due to panic in testPersistence1 function.
internal/stage_6.go (1)
59-59:
⚠️ Potential issueInvalid range loop syntax
The loop syntax is incorrect. In Go, you can only use
rangewith slices, arrays, strings, maps, or channels, butconnectionCountis an integer (defined on line 18).-for i := range connectionCount { +for i := connectionCount - 1; i >= 0; i-- {Note: This should maintain the original reverse order as noted in the comments on lines 37-38.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.for i := connectionCount - 1; i >= 0; i-- {internal/test_helpers/scenarios/pass_base/app/main.py (1)
57-63: 🛠️ Refactor suggestion
Avoid mutable default argument for
headers.Using a mutable default (
{}) can lead to subtle bugs if the argument is modified and reused. It's better to default toNoneand initialize a new dictionary inside the function body.Here's a recommended fix:
def __init__( self, status: HTTPStatus = HTTPStatus.OK, - headers: dict[str, str] = {}, + headers: dict[str, str] | None = None, data: str = "", bytes_data: bytes = b"", ) -> None: if headers is None: headers = {} self.status = f"{status} {status.phrase}" ...📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.def __init__( self, status: HTTPStatus = HTTPStatus.OK, headers: dict[str, str] | None = None, data: str = "", bytes_data: bytes = b"", ) -> None: if headers is None: headers = {} self.status = f"{status} {status.phrase}" ...🧰 Tools
🪛 Ruff (0.8.2)
60-60: Do not use mutable data structures for argument defaults
Replace with
None; initialize within function(B006)
internal/http_messages.go (1)
210-210:
⚠️ Potential issueFix invalid loop range usage.
In Go,
for i := range countis invalid whencountis an integer. Use a classic for loop to iterate from 0 tocount.-func GetRandomRequestResponsePairs(count int, logger *logger.Logger) ([]*RequestResponsePair, error) { - requestResponsePairs := make([]*RequestResponsePair, count) - for i := range count { - requestResponsePair, err := getRandomRequestResponsePair(logger) - ... - } - return requestResponsePairs, nil -} +func GetRandomRequestResponsePairs(count int, logger *logger.Logger) ([]*RequestResponsePair, error) { + requestResponsePairs := make([]*RequestResponsePair, count) + for i := 0; i < count; i++ { + requestResponsePair, err := getRandomRequestResponsePair(logger) + if err != nil { + return nil, err + } + requestResponsePairs[i] = requestResponsePair + } + return requestResponsePairs, nil +}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.func GetRandomRequestResponsePairs(count int, logger *logger.Logger) ([]*RequestResponsePair, error) { requestResponsePairs := make([]*RequestResponsePair, count) for i := 0; i < count; i++ { requestResponsePair, err := getRandomRequestResponsePair(logger) if err != nil { return nil, err } requestResponsePairs[i] = requestResponsePair } return requestResponsePairs, nil }
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