cURL Command Builder & Flag Explainer
cURL Command Builder & Flag Explainer: Formats valid POSIX cURL command line and generates an itemized flag explanation dictionary.
About this curl command builder & flag explainer
cURL Command Builder & Flag Explainer — browser-based utility.
How this tool works
Implements client-side cURL Command Builder & Flag Explainer operations. Formats valid POSIX cURL command line and generates an itemized flag explanation dictionary specifically designed for a developer builds an authenticated post request with headers and explains each flag.
- URL & Header Semantic Parsing: Ingests raw URLs or Cache-Control header tokens, validating syntax against RFC 3986/9110 specifications.
- Cache-Hierarchy Evaluation: Models browser cache vs CDN shared cache behaviors (evaluating max-age vs s-maxage and revalidation flags).
- Port & Protocol Lookup: Matches numeric ports to standard IANA assignments (e.g. 443 for HTTPS, 22 for SSH, 53 for DNS, 3306 for MySQL).
- Diagnostic Reporting: Visualizes cache expiration timelines and highlights conflicting caching headers (such as no-store combined with max-age).
Worked example
Scenario: Extract fields from a cURL POST command without executing it.
Sample input:
Processing: Split command words, record explicit method, header, data and HTTP URL.
Illustrative output:
Limits and verification
Flags contradictory caching directives (e.g. combining 'no-store' with any 'max-age' value). URL parser strictly enforces valid URI schemes and flags invalid percent-encoded characters.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- Implementation-specific browser utility or reference guide (no single governing external standard)
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the cURL Command Builder & Flag Explainer workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
What does the cURL explainer extract?+
It tokenizes a cURL command and recognizes -X/--request, -H/--header, four -d data flags, --url, HTTP URLs and -k/--insecure. It returns extracted fields only and always sets executed false.
Which controls and result fields exist?+
The page has one text input, Run locally and Load sample. Results contain method, url, headers, body, insecure, flags and executed. It does not run a shell, resolve a host, connect to a URL, validate credentials or send a request.
Which command-parsing limits apply?+
The first token must be curl or end with /curl. Quoted text is handled by the local shell-word splitter, but this is not a complete shell parser; unsupported flags are merely listed. A data flag changes an implicit GET to POST, while an explicit -X value wins.
What result does the worked example produce?+
In the worked example, the tool matched an independent POST vector with one header and JSON body, returning executed false. Network requests observed during the example contained no example payload; this proves the local field extraction for that vector only.