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June 4, 2019 18:30
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Make an HTTP/2 Request, works as a PIPE command into openssl s_client.
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#!/usr/bin/env python | |
from __future__ import print_function | |
import struct | |
HTTP2_HEADER="PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" | |
# Does the thing for a frame | |
def frame(ty, flags, streamid, payload): | |
return struct.pack(">L", len(payload))[1:4] + struct.pack(">BBL", ty, flags, streamid) + payload | |
last_stream_id = 0 | |
# Returns a single naively hpacked value | |
def encode_header(key, value): | |
key = key.lower() | |
return struct.pack("<BB", 0, len(key)) + key + struct.pack("<B", len(value)) + value | |
# Does the thing for the HEADERS frame type | |
def headers(headers): | |
global last_stream_id | |
last_stream_id += 1 | |
# flags= (END_STREAM (0x1) | END_HEADERS (0x4)) | |
return frame(0x1, 0x5, last_stream_id, "".join(encode_header(x,y) for (x,y) in headers.items())) | |
def request(host, path, method="GET", scheme="http", extra_headers=None): | |
h = {":authority": host, ":path": path, ":method": method, ":scheme": scheme} | |
if extra_headers is not None: | |
h.update(extra_headers) | |
return headers(h) | |
#print(HTTP2_HEADER + frame(0x4, 0, 0, '') + request("pubnubcoin.com", "/example.php?foo=bar", extra_headers={"User-Agent": "baz"}), end="") | |
#print(HTTP2_HEADER + frame(0x4, 0, 0, '') + request("pubnubcoin.com", "/time/0", extra_headers={"User-Agent": "baz"}), end="") | |
print(HTTP2_HEADER + frame(0x4, 0, 0, '') + request("http2.pubnub.com", "/time/0", method="GET" extra_headers={"User-Agent": "baz"}), end="") |
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