ReqParser

ReqParser is a HTTP request parsing and formatting tool that accepts and logs HTTP requests, parses JSON data, and optionally converts it into Go or Rust struct definitions.

Features

• Accepts and logs all HTTP methods (GET, POST, PUT, DELETE, etc.)
• Parses and displays JSON request bodies
• Optional conversion to programming language formats:
  • Go structs
  • Rust structs (with serde attributes)
• Pretty print JSON with delimiters
• Optional HTTP headers display

Installation

go install github.com/stackloklabs/reqparser@latest

Or clone and build manually:

git clone https://github.com/stackloklabs/reqparser.git
cd reqparser
make build

Flag Behavior

• With -pretty: Shows JSON with delimiters
• Without -pretty: Shows compact JSON-Body format
• With -headers: Shows HTTP headers
• With -format go|rust Generates a struct

• Note: Only parent structs, need to code up child struct generation

Example Outputs

1. Basic usage (no flags):

JSON-Body: {"name":"test","value":123}

2. With -pretty:

==================
JSON START
{
    "name": "test",
    "value": 123
}
==================
JSON END
==================

3. With -headers:

Content-Type: application/json
User-Agent: curl/7.79.1
Accept: */*
Content-Length: 31

JSON-Body: {"name":"test","value":123}

4. With -format go:

JSON-Body: {"name":"test","value":123}
Struct format:
type GeneratedStruct struct {
    name string `json:"name"`
    value float64 `json:"value"`
}

5. With -format rust:

JSON-Body: {"name":"test","value":123}
Struct format:
#[derive(Debug, Serialize, Deserialize)]
struct GeneratedStruct {
    #[serde(rename = "name")]
    name: String,
    #[serde(rename = "value")]
    value: f64,
}

Command Line Options

Usage of reqparser:

reqparser is a HTTP request parsing and formatting tool

Options:
  -port int
        Port to run the server on (default 8080)
  -format string
        Output format type (go, rust) - if not provided, no struct will be generated
  -pretty
        Pretty print JSON with delimiters (if not provided, shows compact JSON-Body)
  -headers
        Show HTTP headers in output
  -version
        Show version information

Prerequisites

• Go 1.20 or later
• Make
• golangci-lint (installed automatically via Makefile)
• gosec (installed automatically via Makefile)