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#!/usr/bin/env python3
import base64
import json
import os
import select
import sys
from urllib.parse import parse_qs, urlparse
import click
def decode(b: bytes, encoding: str = "ascii") -> str:
try:
return b.decode(encoding)
except (UnicodeDecodeError, AttributeError):
return ""
def parse_multipart(body: bytes, boundary: bytes) -> dict:
parts = {}
for part in body.split(b"--" + boundary):
part = part.strip()
if not part or part == b"--":
continue
if b"\r\n\r\n" in part:
headers_raw, content = part.split(b"\r\n\r\n", 1)
elif b"\n\n" in part:
headers_raw, content = part.split(b"\n\n", 1)
else:
continue
headers = {}
for line in headers_raw.split(b"\n"):
if b": " in line:
k, v = line.strip().split(b": ", 1)
headers[decode(k).lower()] = decode(v)
disposition = headers.get("content-disposition", "")
name = None
filename = None
for item in disposition.split(";"):
item = item.strip()
if item.startswith("name="):
name = item[5:].strip('"')
elif item.startswith("filename="):
filename = item[9:].strip('"')
if name:
content = content.rstrip(b"\r\n-")
if filename:
parts[name] = {"filename": filename, "content": decode(content, "utf-8")}
else:
parts[name] = decode(content, "utf-8")
return parts
def parse_body(body: bytes, content_type: str | None) -> dict:
result = {"raw_base64": base64.b64encode(body).decode("ascii")}
if body and content_type:
if "application/json" in content_type:
try:
result["json"] = json.loads(body)
except (json.JSONDecodeError, UnicodeDecodeError):
pass
elif "application/x-www-form-urlencoded" in content_type:
try:
result["form"] = {k: v[0] if len(v) == 1 else v for k, v in parse_qs(decode(body, "utf-8")).items()}
except:
pass
elif "multipart/form-data" in content_type:
for part in content_type.split(";"):
if "boundary=" in part:
boundary = part.split("boundary=", 1)[1].strip().encode()
result["multipart"] = parse_multipart(body, boundary)
break
return result
def read_http_message(fd: int) -> tuple[bytes, bytes]:
buf = b""
timeout = 30.0
while b"\r\n\r\n" not in buf:
if not select.select([fd], [], [], timeout)[0]:
break
chunk = os.read(fd, 4096)
if not chunk:
break
buf += chunk
timeout = 0.1
if b"\r\n\r\n" not in buf:
return buf, b""
header_part, _, body = buf.partition(b"\r\n\r\n")
headers = {}
for line in header_part.split(b"\r\n")[1:]:
if b": " in line:
k, v = line.split(b": ", 1)
headers[decode(k).lower()] = decode(v)
remaining = int(headers.get("content-length", 0)) - len(body)
while remaining > 0:
if not select.select([fd], [], [], 0.1)[0]:
break
chunk = os.read(fd, remaining)
if not chunk:
break
body += chunk
remaining -= len(chunk)
return header_part, body
def parse_message(header_part: bytes, body: bytes, is_response: bool) -> dict:
lines = header_part.split(b"\r\n")
first_line = decode(lines[0]).split(" ", 2)
parsed = {}
for line in lines[1:]:
if b": " in line:
k, v = line.split(b": ", 1)
parsed[decode(k)] = decode(v)
headers = {
"raw_base64": base64.b64encode(b"\r\n".join(lines[1:])).decode("ascii"),
"parsed": parsed,
}
content_type = parsed.get("Content-Type")
if is_response:
return {
"status_code": int(first_line[1]) if len(first_line) > 1 else 0,
"status_text": first_line[2] if len(first_line) > 2 else "",
"headers": headers,
"body": parse_body(body, content_type),
}
path = first_line[1] if len(first_line) > 1 else "/"
parsed_url = urlparse(path)
return {
"method": first_line[0],
"url": path,
"path": parsed_url.path,
"query_params": {k: v[0] if len(v) == 1 else v for k, v in parse_qs(parsed_url.query).items()},
"headers": headers,
"body": parse_body(body, content_type),
}
@click.command()
@click.option("--response", "-r", is_flag=True, help="Parse as HTTP response instead of request")
@click.argument("file", required=False, type=click.Path(exists=True))
def main(response: bool, file: str | None):
"""Parse HTTP requests and responses into JSON."""
if file:
with open(file, "rb") as f:
data = f.read()
if b"\r\n\r\n" in data:
header_part, body = data.split(b"\r\n\r\n", 1)
else:
header_part, body = data, b""
else:
header_part, body = read_http_message(sys.stdin.fileno())
print(json.dumps(parse_message(header_part, body, response), indent=2), flush=True)
os._exit(0)
if __name__ == "__main__":
main()
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