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#!/usr/bin/env python3
"""Compare captured mitmproxy requests between gemini-cli and gemini-py."""
import json
import sys
from pathlib import Path
CAPTURES_DIR = sys.argv[1] if len(sys.argv) > 1 else "./test/captures"
IGNORE_HEADERS = {
"authorization",
"content-length",
"host",
"connection",
"proxy-connection",
"proxy-authorization",
"transfer-encoding",
"accept-encoding",
"x-capture-source",
"user-agent",
}
# Session-specific fields inside request body
VOLATILE_REQUEST_KEYS = {"session_id", "contents"}
def load_captures(directory):
caps = []
for f in sorted(Path(directory).glob("req_*.json")):
with open(f) as fh:
d = json.load(fh)
# Only compare the main content generation calls
url = d.get("url", "")
u = url.lower()
if "generatecontent" in u and "loadcodeassist" not in u and "counttokens" not in u:
caps.append(d)
return caps
def normalize_headers(headers):
return {k.lower(): v for k, v in headers.items() if k.lower() not in IGNORE_HEADERS}
def normalize_body(body):
if not isinstance(body, dict):
return body
out = {}
for k, v in body.items():
if k == "user_prompt_id":
out[k] = "<redacted>"
elif k == "request" and isinstance(v, dict):
out[k] = {
rk: ("<redacted>" if rk in VOLATILE_REQUEST_KEYS else rv) for rk, rv in v.items()
}
else:
out[k] = v
return out
def fmt(v):
if isinstance(v, (dict, list)):
return json.dumps(v, indent=2, default=str)
return str(v)
def compare_dicts(label, d1, d2, n1, n2):
keys = sorted(set(list(d1.keys()) + list(d2.keys())))
diffs = 0
for key in keys:
v1 = d1.get(key, "<missing>")
v2 = d2.get(key, "<missing>")
if v1 == v2:
print(f" \033[32m✓\033[0m {key}")
else:
diffs += 1
print(f" \033[31m✗\033[0m {key}")
print(f" {n1}: {fmt(v1)}")
print(f" {n2}: {fmt(v2)}")
if diffs == 0:
print(f" \033[32m{label}: IDENTICAL\033[0m")
else:
print(f" \033[31m{label}: {diffs} difference(s)\033[0m")
return diffs
def dump_request(cap):
src = cap.get("source", "?")
print(f" Source: {src}")
print(f" URL: {cap['url']}")
headers = normalize_headers(cap.get("headers", {}))
body = cap.get("body", {})
print(f" Headers ({len(headers)}):")
for k in sorted(headers):
print(f" {k}: {headers[k]}")
if isinstance(body, dict):
print(f" Body keys: {sorted(body.keys())}")
print(f" model: {body.get('model', 'N/A')}")
print(f" project: {body.get('project', 'N/A')}")
req = body.get("request", {})
if isinstance(req, dict):
print(f" generationConfig: {req.get('generationConfig', 'N/A')}")
def main():
caps = load_captures(CAPTURES_DIR)
if not caps:
print(f"No generateContent captures found in {CAPTURES_DIR}")
print("Run gemini-cli and gemini-py through the proxy first.")
sys.exit(1)
by_source = {}
for c in caps:
src = c.get("source", "unknown")
by_source.setdefault(src, []).append(c)
sources = {k: len(v) for k, v in by_source.items()}
print(f"Found {len(caps)} generateContent request(s)")
print(f"Sources: {sources}\n")
for i, cap in enumerate(caps):
print(f"--- Request #{cap.get('capture_id', i + 1)} ---")
dump_request(cap)
print()
sources = list(by_source.keys())
if len(sources) == 2 and all(len(v) >= 1 for v in by_source.values()):
n1, n2 = sources
def pick(caps):
# Prefer streamGenerateContent (actual response) over routing calls
streaming = [c for c in caps if "streamgeneratecontent" in c.get("url", "").lower()]
return streaming[-1] if streaming else caps[-1]
c1, c2 = pick(by_source[n1]), pick(by_source[n2])
print("=" * 60)
print(f"COMPARING: {n1} vs {n2}")
print("=" * 60)
h1 = normalize_headers(c1.get("headers", {}))
h2 = normalize_headers(c2.get("headers", {}))
total = compare_dicts("Headers", h1, h2, n1, n2)
b1 = normalize_body(c1.get("body", {}))
b2 = normalize_body(c2.get("body", {}))
total += compare_dicts("Body", b1, b2, n1, n2)
print(f"\n{'=' * 60}")
if total == 0:
print("\033[32mRESULT: Requests are identical on the wire.\033[0m")
else:
print(f"\033[31mRESULT: {total} total difference(s).\033[0m")
sys.exit(0 if total == 0 else 1)
else:
print("Tip: Clear test/captures/ and run one request from each client to compare.")
if __name__ == "__main__":
main()
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