From 24a4a426420f78de98786633d8191e7f24bf046c Mon Sep 17 00:00:00 2001
From: Michael Vrable <mvrable@cs.ucsd.edu>
Date: Wed, 28 Apr 2010 11:04:12 -0700
Subject: [PATCH] Create a simple Python script for sending pipelined GET
 requests to S3.

S3 doesn't seem to respond properly to these yet.
---
 s3bench/s3pipeline.py | 88 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100755 s3bench/s3pipeline.py

diff --git a/s3bench/s3pipeline.py b/s3bench/s3pipeline.py
new file mode 100755
index 0000000..bad40df
--- /dev/null
+++ b/s3bench/s3pipeline.py
@@ -0,0 +1,88 @@
+#!/usr/bin/python2.6
+
+import boto, httplib, socket, sys, time
+from boto.s3.key import Key
+from threading import Thread
+
+bucket_name = 'mvrable-benchmark'
+conn = boto.connect_s3(is_secure=False)
+
+class HttpResponseParser:
+    def __init__(self):
+        self.buf = ""
+        self.header = True
+        self.content_length = None
+
+    def process(self, data):
+        self.buf = self.buf + data
+        while self.parse():
+            pass
+
+    def parse(self):
+        if len(self.buf) == 0:
+            return False
+
+        if not self.header and self.content_length is not None:
+            consumed = min(self.content_length, len(self.buf))
+            print "Got", consumed, "bytes of data"
+            self.content_length -= consumed
+            self.buf = self.buf[consumed:]
+
+            if self.content_length == 0:
+                print "Completed reading body"
+                self.content_length = None
+                self.header = True
+
+            return True
+
+        crlf = self.buf.find("\r\n")
+        if crlf < 0:
+            return False
+
+        line = self.buf[0:crlf]
+        self.buf = self.buf[crlf+2:]
+        print "Header line:", line
+        if line.lower().startswith('content-length'):
+            self.content_length = int(line[16:])
+            print "Content length:", self.content_length
+        if line == "":
+            self.header = False
+        return True
+
+class PipelinedRequester:
+    def __init__(self, bucket):
+        self.bucket = bucket
+        self.host = conn.calling_format.build_host(conn.server_name(), bucket)
+        self.sock = socket.create_connection((self.host, 80))
+
+        t = Thread(target=self.reader_thread)
+        t.setDaemon(True)
+        t.start()
+
+    def reader_thread(self):
+        hrp = HttpResponseParser()
+        while True:
+            buf = self.sock.recv(4096)
+            if len(buf) == 0: break
+            hrp.process(buf)
+
+    def send_request(self, key):
+        method = 'GET'
+        path = conn.calling_format.build_path_base(self.bucket, key)
+        auth_path = conn.calling_format.build_auth_path(self.bucket, key)
+
+        headers = {'User-Agent': boto.UserAgent + " (pipelined)",
+                   'Content-Length': str(0), 'Connection': 'keep-alive'}
+        conn.add_aws_auth_header(headers, method, auth_path)
+
+        req = "%s %s HTTP/1.1\r\nHost: %s\r\n" % (method, path, self.host)
+        req = req + ''.join("%s: %s\r\n" % h for h in headers.items()) + "\r\n"
+        self.sock.sendall(req)
+
+requester = PipelinedRequester(bucket_name)
+for i in range(16):
+    requester.send_request('file-8192-' + str(i))
+    if i == 0:
+        time.sleep(2)
+
+time.sleep(5)
-- 
2.20.1