#!/usr/bin/python
import datetime
import sqlite3
from wsgiref.simple_server import make_server
import jinja2
from werkzeug.exceptions import HTTPException, NotFound
from werkzeug.routing import Map, Rule, RequestRedirect
from werkzeug.wrappers import Request, Response
jinjaenv = jinja2.Environment(loader=jinja2.FileSystemLoader("."))
def format_size(size):
assert isinstance(size, int)
size = float(size)
fmt = "%d B"
if size >= 1024:
size /= 1024
fmt = "%.1f KB"
if size >= 1024:
size /= 1024
fmt = "%.1f MB"
if size >= 1024:
size /= 1024
fmt = "%.1f GB"
return fmt % size
jinjaenv.filters["format_size"] = format_size
base_template = jinjaenv.get_template("base.html")
package_template = jinjaenv.from_string(
"""{% extends "base.html" %}
{% block title %}duplication of {{ package|e }}{% endblock %}
{% block header %}<style type="text/css">.dependency { background-color: yellow; } </style>{% endblock %}
{% block content %}<h1>{{ package|e }}</h1>
<p>Version: {{ version|e }}</p>
<p>Architecture: {{ architecture|e }}</p>
<p>Number of files: {{ num_files }}</p>
<p>Total size: {{ total_size|format_size }}</p>
{%- if shared -%}
{%- for function, sharing in shared.items() -%}
<h3>sharing with respect to {{ function }}</h3>
<table border='1'><tr><th>package</th><th>files shared</th><th>data shared</th></tr>
{%- for entry in sharing|sort(attribute="savable", reverse=true) -%}
<tr><td{% if not entry.package or entry.package in dependencies %} class="dependency"{% endif %}>
{%- if entry.package %}<a href="{{ entry.package|e }}">{{ entry.package|e }}</a>{% else %}self{% endif %}
<a href="../compare/{{ package|e }}/{{ entry.package|default(package, true)|e }}">compare</a></td>
<td>{{ entry.duplicate }} ({{ (100 * entry.duplicate / num_files)|int }}%)</td>
<td>{{ entry.savable|format_size }} ({{ (100 * entry.savable / total_size)|int }}%)</td></tr>
{%- endfor -%}
</table>
{%- endfor -%}
{%- endif -%}
{% endblock %}""")
detail_template = jinjaenv.from_string(
"""{% extends "base.html" %}
{% block title %}sharing between {{ details1.package|e }} and {{ details2.package|e }}{% endblock%}
{% block content %}
<h1><a href="../../binary/{{ details1.package|e }}">{{ details1.package|e }}</a> <-> <a href="../../binary/{{ details2.package|e }}">{{ details2.package|e }}</a></h1>
{%- if shared -%}
<table border='1'><tr><th>size</th><th>filename in {{ details1.package|e }}</th><th>filename in {{ details2.package|e }}</th><th>hash functions</th></tr>
{%- for entry in shared|sort(attribute="size", reverse=true) -%}
<tr><td>{{ entry.size|format_size }}</td><td>{{ entry.filename1 }}</td><td>{{ entry.filename2 }}</td><td>
{%- for function, hashvalue in entry.functions.items() %}<a href="../../hash/{{ function|e }}/{{ hashvalue|e }}">{{ function|e }}</a> {% endfor %}</td></tr>
{%- endfor -%}
</table>
{%- endif -%}
{% endblock %}""")
hash_template = jinjaenv.from_string(
"""{% extends "base.html" %}
{% block title %}information on {{ function|e }} hash {{ hashvalue|e }}{% endblock %}
{% block content %}
<h1>{{ function|e }} {{ hashvalue|e }}</h1>
<table border='1'><tr><th>package</th><th>filename</th><th>size</th></tr>
{%- for entry in entries -%}
<tr><td><a href="../../binary/{{ entry.package|e }}">{{ entry.package|e }}</a></td>
<td>{{ entry.filename|e }}</td><td>{{ entry.size|format_size }}</td></tr>
{%- endfor -%}
</table>
{% endblock %}""")
index_template = jinjaenv.from_string(
"""{% extends "base.html" %}
{% block title %}Debian duplication detector{% endblock %}
{% block content %}
<h1>Debian duplication detector</h1>
<ul>
<li>To inspect a particlar binary package, go to <pre>binary/<packagename></pre> Example: <a href="binary/git">binary/git</a></li>
<li>To inspect a combination of binary packages go to <pre>compare/<firstpackage>/<secondpackage></pre> Example: <a href="compare/git/git">compare/git/git</a></li>
<li>To discover package shipping a particular file go to <pre>hash/sha512/<hashvalue></pre> Example: <a href="hash/sha512/ed94df7781793f06f9426a600c1bde86397afc7b35cb3aa11b60214bd31e35ad893b53a04a2cf4676154982d7c204c4aa165d6ccdaac0170031364a05dbab3bc">hash/sha512/ed94df7781793f06f9426a600c1bde86397afc7b35cb3aa11b60214bd31e35ad893b53a04a2cf4676154982d7c204c4aa165d6ccdaac0170031364a05dbab3bc</a></li>
</ul>
{% endblock %}""")
def fetchiter(cursor):
rows = cursor.fetchmany()
while rows:
for row in rows:
yield row
rows = cursor.fetchmany()
def encode_and_buffer(iterator):
buff = b""
for elem in iterator:
buff += elem.encode("utf8")
if len(buff) >= 2048:
yield buff
buff = b""
if buff:
yield buff
def html_response(unicode_iterator, max_age=24 * 60 * 60):
resp = Response(encode_and_buffer(unicode_iterator), mimetype="text/html")
resp.cache_control.max_age = max_age
resp.expires = datetime.datetime.now() + datetime.timedelta(seconds=max_age)
return resp
class Application(object):
def __init__(self):
self.db = sqlite3.connect("test.sqlite3")
self.cur = self.db.cursor()
self.routingmap = Map([
Rule("/", methods=("GET",), endpoint="index"),
Rule("/binary/<package>", methods=("GET",), endpoint="package"),
Rule("/compare/<package1>/<package2>", methods=("GET",), endpoint="detail"),
Rule("/hash/<function>/<hashvalue>", methods=("GET",), endpoint="hash"),
])
@Request.application
def __call__(self, request):
mapadapter = self.routingmap.bind_to_environ(request.environ)
try:
endpoint, args = mapadapter.match()
if endpoint == "package":
return self.show_package(args["package"])
elif endpoint == "detail":
return self.show_detail(args["package1"], args["package2"])
elif endpoint == "hash":
return self.show_hash(args["function"], args["hashvalue"])
elif endpoint == "index":
if not request.environ["PATH_INFO"]:
raise RequestRedirect(request.environ["SCRIPT_NAME"] + "/")
return html_response(index_template.stream())
raise NotFound()
except HTTPException as e:
return e
def get_details(self, package):
self.cur.execute("SELECT version, architecture FROM package WHERE package = ?;",
(package,))
row = self.cur.fetchone()
if not row:
raise NotFound()
version, architecture = row
details = dict(package=package,
version=version,
architecture=architecture)
self.cur.execute("SELECT count(filename), sum(size) FROM content WHERE package = ?;",
(package,))
num_files, total_size = self.cur.fetchone()
details.update(dict(num_files=num_files, total_size=total_size))
return details
def get_dependencies(self, package):
self.cur.execute("SELECT required FROM dependency WHERE package = ?;",
(package,))
return set(row[0] for row in fetchiter(self.cur))
def show_package(self, package):
params = self.get_details(package)
params["dependencies"] = self.get_dependencies(package)
shared = dict()
self.cur.execute("SELECT a.filename, a.function, a.hash, a.size, b.package FROM content AS a JOIN content AS b ON a.function = b.function AND a.hash = b.hash WHERE a.package = ? AND (a.filename != b.filename OR b.package != ?);",
(package, package))
for afile, function, hashval, size, bpkg in fetchiter(self.cur):
pkgdict = shared.setdefault(function, dict())
hashdict = pkgdict.setdefault(bpkg, dict())
fileset = hashdict.setdefault(hashval, (size, set()))[1]
fileset.add(afile)
sharedstats = {}
if shared:
for function, sharing in shared.items():
sharedstats[function] = list()
mapping = sharing.pop(package, dict())
if mapping:
duplicate = sum(len(files) for _, files in mapping.values())
savable = sum(size * (len(files) - 1) for size, files in mapping.values())
sharedstats[function].append(dict(package=None, duplicate=duplicate, savable=savable))
for pkg, mapping in sharing.items():
duplicate = sum(len(files) for _, files in mapping.values())
savable = sum(size * len(files) for size, files in mapping.values())
sharedstats[function].append(dict(package=pkg, duplicate=duplicate, savable=savable))
params["shared"] = sharedstats
return html_response(package_template.render(params))
def show_detail(self, package1, package2):
if package1 == package2:
details1 = details2 = self.get_details(package1)
self.cur.execute("SELECT a.filename, b.filename, a.size, a.function, a.hash FROM content AS a JOIN content AS b ON a.function = b.function AND a.hash = b.hash WHERE a.package = ? AND b.package = ? AND a.filename != b.filename;",
(package1, package1))
else:
details1 = self.get_details(package1)
details2 = self.get_details(package2)
self.cur.execute("SELECT a.filename, b.filename, a.size, a.function, a.hash FROM content AS a JOIN content AS b ON a.function = b.function AND a.hash = b.hash WHERE a.package = ? AND b.package = ?;",
(package1, package2))
shared = dict()
for filename1, filename2, size, function, hashvalue in fetchiter(self.cur):
shared.setdefault((filename1, filename2, size), dict())[function] = hashvalue
shared = [dict(filename1=filename1, filename2=filename2, size=size,
functions=functions)
for (filename1, filename2, size), functions in shared.items()]
params = dict(
details1=details1,
details2=details2,
shared=shared)
return html_response(detail_template.render(params))
def show_hash(self, function, hashvalue):
self.cur.execute("SELECT package, filename, size FROM content WHERE function = ? AND hash = ?;",
(function, hashvalue))
entries = [dict(package=package, filename=filename, size=size)
for package, filename, size in fetchiter(self.cur)]
if not entries:
raise NotFound()
params = dict(function=function, hashvalue=hashvalue, entries=entries)
return html_response(hash_template.render(params))
def main():
app = Application()
#app = DebuggedApplication(app, evalex=True)
make_server("0.0.0.0", 8800, app).serve_forever()
if __name__ == "__main__":
main()