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|
#!/usr/bin/env python
"""
pypi.py
Copyright (C) 2006 David Boddie
This file is part of PyPI Browser, a GUI browser for the Python Package Index.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
import os, urlparse, xmlrpclib
class Package:
"""Package
Describes a package in the package index.
Initially, the package has a name but, unless specified when created,
no release information. Release information is added as required,
typically by models that incrementally populate their internal structure.
"""
def __init__(self, name, releases = None):
self.name = name
self.releases = releases
self.new = True
class Release:
"""Release
Describes a single release of a package.
Initially, the release contains a reference to the relevant package
and a version string. The description, unless specified on creation,
is added as required.
"""
def __init__(self, package, version, description = None):
self.package = package
self.version = version
self.description = description
class Description:
"""Description
Provides a description of a single release of a package.
By default, descriptions are created with a reference to the release
they describe and an empty set of metadata. The metadata dictionary can
be accessed via the instance's metadata attribute.
"""
template_metadata = {
"name": None, "version": None, "stable_version": None,
"author": None, "author_email": None, "maintainer": None,
"maintainer_email": None, "home_page": None, "license": None,
"summary": None, "description": None,
"keywords": None, "platform": None, "download_url": None,
"classifiers": None, "release_urls": None
}
def __init__(self, release, metadata = {}):
self.release = release
self.metadata = self.template_metadata.copy()
for key in metadata.keys():
if self.metadata.has_key(key):
self.metadata[key] = metadata[key]
def metaData(self, field):
"""data(self, field)
Returns data corresponding to a given field in the description's
metadata.
"""
try:
value = self.metadata[field]
except KeyError:
return None
if field == "classifiers":
return u", ".join(value)
else:
return value
def setMetaData(self, field, data):
if data is None:
return
elif field == u"home_page":
if not urlparse.urlsplit(data)[0]:
data = None
elif field == u"download_url":
pieces = urlparse.urlsplit(data)
path = pieces[2]
if not path or path.endswith(u".html") or path.endswith(u"/"):
data = None
elif u"." not in path.split(u"/")[-1]:
data = None
else:
data = [u"url", data, u"packagetype", u"default"]
urls = self.metadata[u"release_urls"]
if not urls:
self.metadata[u"release_urls"] = data
else:
urls.append(data)
elif field == u"release_urls":
# Convert the dictionary into a list for serialisation.
lists = []
for url_dict in data:
lists += [(u"url", url_dict[u"url"]), (u"packagetype", url_dict[u"packagetype"])]
data = reduce(lambda x, y: x + list(y), lists, [])
self.metadata[field] = data
class AbstractServer:
"""AbstractServer
A base class for classes representing XML-RPC interfaces to package
indexes.
"""
def __init__(self, url = None):
self.url = url
def name(self):
if self.url:
return urlparse.urlsplit(self.url)[1]
else:
return None
def list_packages(self):
return []
class PackageServer(AbstractServer):
"""PackageServer(AbstractServer)
Provides an XML-RPC interface to a package index with a thin API over
the methods exported by the remote XML-RPC server.
"""
def __init__(self, url):
AbstractServer.__init__(self, url)
self.server = xmlrpclib.Server(url)
def list_packages(self):
"""list_packages(self)
Returns a sorted list of package name strings or an empty list if
the server could not be accessed successfully.
"""
try:
names = self.server.list_packages()
names.sort()
return map(Package, names)
except xmlrpclib.Error:
return []
def package_releases(self, package):
"""package_releases(self, package)
Returns a list of version strings describing the available releases
of the package specified by a Package object.
An empty list is returned if the call was unsuccessful.
"""
try:
return map(lambda x: Release(package, x), self.server.package_releases(package.name))
except xmlrpclib.Error:
print "missing release:", package.name
return []
def package_stable_release(self, package):
"""package_stable_release(self, package)
Returns a version string describing the stable release
of the package specified by a Package object.
No exception handling is performed.
"""
return Release(package, self.server.package_stable_release(package.name))
def release_urls(self, release):
"""release_urls(self, release)
Returns a list of dictionaries containing download information for
a given release specified by a Release object.
If the information could not be retrieved from the server, None is
returned.
"""
try:
return self.server.release_urls(release.package.name, release.version)
except xmlrpclib.Error:
return None
def release_data(self, release):
"""release_data(self, release)
Returns a Description object containing information about a given
release specified by a Release object.
If the information could not be retrieved from the server, None is
returned.
"""
try:
description = Description(release)
metadata = self.server.release_data(release.package.name, release.version)
for field, data in metadata.items():
description.setMetaData(field, data)
return description
except xmlrpclib.Error:
print "missing data:", release.package.name, release.version
return None
def release_full_data(self, release):
"""release_full_data(self, release)
Returns a Description object containing information about a given
release specified by a Release object.
If the information could not be retrieved from the server, None is
returned.
"""
try:
description = Description(release)
metadata = self.server.release_data(release.package.name, release.version)
for field, data in metadata.items():
description.setMetaData(field, data)
# Add additional information about download URLs for this release
# to the description.
urls = self.release_urls(release)
if urls:
description.setMetaData("release_urls", urls)
return description
except xmlrpclib.Error:
print "missing data:", release.package.name, release.version
return None
def search(self, specification, operator = "and"):
"""search(self, specification, operator = "and")
Searches the package index using the specified operator to combine
words in the given specification, returning a list of dictionaries
each containing the name, version and summary of each matching
package.
"""
# Possibly add a name: Package dictionary so that we can relate the
# descriptions returned to existing packages.
return self.server.search(specification, operator)
class TestServer(AbstractServer):
"""TestServer(AbstractServer)
A test server for simple GUI testing purposes.
"""
def __init__(self):
AbstractServer.__init__(self)
package = Package("Test package")
release1 = Release(package, "0.1")
description1 = Description(release1, {
"name": "Test package", "author": "David Boddie", "version": "0.1",
"download_url": "file://%s" % os.path.abspath(__file__),
"home_page": "file://"})
release1.description = description1
package.releases = [release1]
self.packages = [package]
def list_packages(self):
return self.packages
def package_releases(self, package):
try:
return map(lambda x: Release(package, x), self.server.package_releases(package.name))
except xmlrpclib.Error:
print "missing release:", package.name
return []
def package_stable_release(self, package):
return Release(package, self.server.package_stable_release(package.name))
def release_urls(self, release):
return self.server.release_urls(release.package.name, release.version)
def release_data(self, release):
try:
description = Description(release)
metadata = self.server.release_data(release.package.name, release.version)
for field, data in metadata.items():
description.setMetaData(field, data)
return description
except xmlrpclib.Error:
print "missing data:", release.package.name, release.version
return None
def search(self, spec, operator = "and"):
return self.server.search(spec, operator)
|
