hurley

hurley — HTTP Client & Performance Testing

What hurley Does

hurley is a curl-like CLI HTTP client with four operating modes:

Mode	Trigger	Description
Single request	Default (no -c/-n/--perf)	One HTTP call, response to stdout
Standalone data-file	--data-file only (default -n 1)	One request per data row, sequential
Performance test	-n > 1 or -c > 1 or --perf	Concurrent load with latency metrics
Workflow	--workflow <file>	Sequential steps with conditional execution

---

1. Single HTTP Requests

Flags

Flag	Long	Description
-X	--method	HTTP method: GET, POST, PUT, DELETE, PATCH, HEAD (default: GET)
-H	--header	Header in "Name: Value" format; repeatable
-d	--data	Inline request body
-f	--file	Read body from file
-i	--include	Print response headers in output
-L	--location	Follow redirects (up to 10)
-v	--verbose	Print request details before sending
--timeout		Request timeout in seconds (default: 30)

Examples

# GET
hurley https://httpbin.org/get

# GET with response headers included
hurley -i https://httpbin.org/get

# GET verbose
hurley -v https://httpbin.org/get

# Follow redirects
hurley -L https://httpbin.org/redirect/3

# POST with inline JSON body
hurley -X POST https://httpbin.org/post \
  -H "Content-Type: application/json" \
  -d '{"name": "test", "value": 123}'

# POST body from file
hurley -X POST https://httpbin.org/post \
  -H "Content-Type: application/json" \
  -f payload.json

# PUT with auth header
hurley -X PUT https://api.example.com/items/42 \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"status": "active"}'

# DELETE
hurley -X DELETE https://api.example.com/items/42

# Custom timeout
hurley --timeout 10 https://slow-api.example.com/data

---

2. Performance Testing

Activate by setting -n > 1, -c > 1, or providing --perf.

Additional Flags

Flag	Long	Description
-c	--concurrency	Concurrent connections (default: 1)
-n	--requests	Total requests to send (default: 1)
--perf		Path to JSON dataset for multi-endpoint load test
--output		Output format: text (default) or json

Examples

# 100 requests, 10 concurrent
hurley https://httpbin.org/get -c 10 -n 100

# 500 requests with a multi-endpoint dataset
hurley https://httpbin.org --perf requests.json -c 20 -n 500

# Machine-readable JSON output
hurley https://httpbin.org/get -c 5 -n 50 --output json

--perf Dataset Format (JSON array)

[
  {"method": "GET", "path": "/users"},
  {"method": "POST", "path": "/users", "body": {"name": "test"}},
  {"method": "GET", "path": "/users/1", "headers": {"Authorization": "Bearer token"}}
]

Performance Output

The text report includes:

• Request Summary: total, successful, failed, error rate
• Timing: total duration (ms), requests/sec
• Latency Distribution: min, max, avg, p50, p95, p99
• Endpoint Breakdown: per-path metrics when using --perf dataset

---

3. Parameterized Load Testing (--data-file)

Substitute {{placeholder}} tokens in the URL, headers, and body using rows from a CSV or JSON data file. Rows are cycled sequentially across total requests.

Flag

Flag	Description
--data-file <path>	CSV (with header row) or JSON array of objects

Substitution scope

{{placeholder}} is replaced in:

• URL path
• Header values (-H)
• Inline body (-d)

CSV format

user_id,api_token,role
101,abc123,admin
102,def456,user
103,ghi789,viewer

JSON format

[
  {"user_id": "101", "api_token": "abc123", "role": "admin"},
  {"user_id": "102", "api_token": "def456", "role": "user"}
]

Examples

# Load test — 1000 requests, cycling through CSV rows
hurley -X POST https://api.example.com/users/{{user_id}} \
  -H "Authorization: Bearer {{api_token}}" \
  -d '{"role": "{{role}}"}' \
  --data-file users.csv -c 10 -n 1000

# Standalone mode — one request per row (no -n or -c)
hurley https://api.example.com/users/{{user_id}} --data-file users.csv

Note: --data-file alone (default -n 1) does not activate performance mode. It sends one request per row sequentially. Performance mode requires -n > 1, -c > 1, or --perf.

---

4. Workflows (--workflow)

Run multi-step sequential HTTP requests where later steps can be skipped or executed based on JSON values from earlier responses.

Flag

Flag	Description
--workflow <file>	Path to JSON workflow definition

workflow.json format

{
  "steps": [
    {
      "id": "step_id",
      "request": {
        "method": "GET",
        "path": "/endpoint"
      }
    },
    {
      "id": "conditional_step",
      "condition": "responses.<step_id>.<json.path> == \"expected\"",
      "request": {
        "method": "POST",
        "path": "/other",
        "body": {"key": "value"}
      }
    }
  ]
}

Condition syntax

• Reference prior responses: responses.<step_id>.<dot.path>
• Supports equality check: == "string" or == number
• Steps without condition always execute

Example

Given flow.json:

{
  "steps": [
    {
      "id": "get_user",
      "request": {
        "method": "GET",
        "path": "https://httpbin.org/json"
      }
    },
    {
      "id": "post_if_match",
      "condition": "responses.get_user.slideshow.author == \"Yours Truly\"",
      "request": {
        "method": "POST",
        "path": "https://httpbin.org/post",
        "body": {"message": "Author matched!"}
      }
    }
  ]
}

hurley --workflow flow.json https://httpbin.org

---

Quick Decision Guide

Goal	Command shape
Single API call	hurley [-X METHOD] <url> [-H ...] [-d body]
Check headers/verbose	add -i or -v
Follow redirects	add -L
Load test single endpoint	add -c <N> -n <M>
Load test multiple endpoints	--perf dataset.json -c <N> -n <M>
Data-driven substitution	--data-file data.csv (+ -n / -c for perf)
Multi-step conditional flow	--workflow flow.json
Machine-readable results	add --output json

---

Common Pitfalls

• --data-file alone is not perf mode. Without -n > 1 or -c > 1, hurley sends one request per row sequentially.
• --perf path vs --workflow path are mutually exclusive concerns. --perf is for load testing multi-endpoint datasets; --workflow is for sequential dependent steps.
• Placeholder names must match column headers exactly (case-sensitive). All {{placeholder}} tokens must exist as columns; hurley reports all missing ones before aborting.
• Workflow path must be absolute URLs when there is no base-URL context implied by the step (check existing flow.json examples for your target API).