1
0
mirror of https://github.com/spl0k/supysonic.git synced 2024-12-22 08:56:17 +00:00

Correct FK fields to match parent column type.

Add error handling for fetching an rss feed.
Add error handling for failure modes of feedparser
Add more optional fields to episode as a 'child'
Add planet money rss feed for testing
This commit is contained in:
Carl Hall 2020-08-16 21:13:32 -07:00
parent 08a83a8492
commit be305225e1
13 changed files with 325 additions and 36 deletions

View File

@ -13,6 +13,7 @@ from time import mktime
from urllib.parse import urlparse
from flask import request
import feedparser
from ..db import PodcastChannel, PodcastEpisode, PodcastStatus
@ -38,30 +39,73 @@ def get_podcasts():
)
def fetch_feed(url):
parsed_url = urlparse(url)
has_scheme_and_location = parsed_url.scheme and (parsed_url.netloc or parsed_url.path)
if not has_scheme_and_location:
return None, request.formatter.error(10, 'unexepected url')
try:
feed = feedparser.parse(url)
except Exception as ex:
return None, request.formatter.error(0, 'unexpected error')
if feed.status != 200:
return None, request.formatter.error(0, 'http:' + feed.status)
if feed.bozo:
return None, request.formatter.error(0, feed.bozo_exception)
if not hasattr(feed.feed, 'title'):
return None, request.formatter.error(10, 'title missing')
return feed, None
@api.route("/createPodcastChannel.view", methods=["GET", "POST"])
@require_podcast
def create_podcast_channel():
url = request.values["url"]
parsed_url = urlparse(url)
has_scheme_and_location = parsed_url.scheme and (parsed_url.netloc or parsed_url.path)
if not has_scheme_and_location:
return request.formatter.error(10, 'unexepected url')
feed, error = fetch_feed(url)
if error:
return error
feed = feedparser.parse(url)
channel = PodcastChannel(
url=url,
title=feed.feed.title,
)
for item in feed.entries:
channel.episodes.create(
title=item.title,
description=item.description,
stream_url=item.links[0].href,
duration=item.links[0].length,
publish_date=datetime.fromtimestamp(mktime(item.published_parsed)),
status=PodcastStatus.new.value,
)
# NOTE: 'suffix' and 'bitrate' will be set when downloading to local file
fields = {
'title': item.title,
'description': item['description'],
'year': item.published_parsed.tm_year,
'publish_date': datetime.fromtimestamp(mktime(item.published_parsed)),
'status': PodcastStatus.new.value,
}
audio_link = next((link for link in item.links if link.type == 'audio/mpeg'), None)
if audio_link:
fields['stream_url'] = audio_link.href
fields['size'] = audio_link.length
fields['content_type'] = audio_link.type
else:
fields['status'] = PodcastStatus.error.value
fields['error_message'] = 'Audio link not found in episode xml'
if item['itunes_duration']:
fields['duration'] = item.itunes_duration
if feed.feed['image'] and feed.feed.image['href']:
fields['cover_art'] = feed.feed.image.href
if feed.feed['tags']:
fields['genre'] = ",".join([tag['term'] for tag in feed.feed.tags])
channel.episodes.create(**fields)
return request.formatter.empty

View File

@ -641,7 +641,15 @@ class PodcastEpisode(db.Entity):
# Status params mirror PodcastStatus
status = Required(int, min=1, max=6, default=1)
publish_date = Optional(datetime, precision=0, default=now)
error_message = Optional(str, nullable=True)
created = Required(datetime, precision=0, default=now)
size = Optional(int, nullable=True)
suffix = Optional(str, nullable=True)
bitrate = Optional(str, nullable=True)
content_type = Optional(str, nullable=True)
cover_art = Optional(str, nullable=True)
genre = Optional(str, nullable=True)
year = Optional(int, nullable=True)
def soft_delete(self):
self.status = PodcastStatus.deleted.value
@ -660,11 +668,16 @@ class PodcastEpisode(db.Entity):
status=PodcastStatus(self.status).name,
)
if self.description:
info["description"] = self.description,
if self.publish_date:
info["publishDate"] = self.publish_date.isoformat()
opt_fields = [ 'description', 'duration', 'size', 'suffix', 'bitrate', 'content_type', 'cover_art', 'genre', 'year' ]
for opt in opt_fields:
if hasattr(self, opt):
val = getattr(self, opt)
if val:
info[opt] = val
return info

View File

@ -17,13 +17,21 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
id BINARY(16) PRIMARY KEY,
stream_url VARCHAR(256) NOT NULL,
file_path VARCHAR(256),
channel_id CHAR(36) NOT NULL,
channel_id BINARY(16) NOT NULL,
title VARCHAR(256),
description VARCHAR(256),
duration VARCHAR(8),
status TINYINT NOT NULL,
publish_date DATETIME,
error_message VARCHAR(256),
created DATETIME NOT NULL,
size INTEGER,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT,
FOREIGN KEY(channel_id) REFERENCES podcast_channel(id),
INDEX index_episode_channel_id_fk (channel_id),
INDEX index_episode_status (status)

View File

@ -18,13 +18,21 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
id UUID PRIMARY KEY,
stream_url VARCHAR(256) NOT NULL,
file_path VARCHAR(256),
channel_id CHAR(36) NOT NULL REFERENCES podcast_channel(id),
channel_id UUID NOT NULL REFERENCES podcast_channel(id),
title VARCHAR(256),
description VARCHAR(256),
duration VARCHAR(8),
status TINYINT NOT NULL,
publish_date TIMESTAMP,
created TIMESTAMP NOT NULL
error_message VARCHAR(256),
created TIMESTAMP NOT NULL,
size INTEGER,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT
);
CREATE INDEX IF NOT EXISTS index_episode_channel_id_fk ON podcast_channel(id);
CREATE INDEX IF NOT EXISTS index_episode_status ON podcast_episode(status);

View File

@ -24,7 +24,15 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
duration VARCHAR(8),
status TINYINT NOT NULL,
publish_date DATETIME,
created DATETIME NOT NULL
error_message VARCHAR(256),
created DATETIME NOT NULL,
size INT,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT
);
CREATE INDEX IF NOT EXISTS index_episode_channel_id_fk ON podcast_channel(id);
CREATE INDEX IF NOT EXISTS index_episode_status_id_fk ON podcast_episode(status);

View File

@ -176,13 +176,21 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
id BINARY(16) PRIMARY KEY,
stream_url VARCHAR(256) NOT NULL,
file_path VARCHAR(256),
channel_id CHAR(36) NOT NULL,
channel_id BINARY(16) NOT NULL,
title VARCHAR(256),
description VARCHAR(256),
duration VARCHAR(8),
status TINYINT NOT NULL,
publish_date DATETIME,
error_message VARCHAR(256),
created DATETIME NOT NULL,
size INTEGER,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT,
FOREIGN KEY(channel_id) REFERENCES podcast_channel(id),
INDEX index_episode_channel_id_fk (channel_id),
INDEX index_episode_status (status)

View File

@ -177,13 +177,21 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
id UUID PRIMARY KEY,
stream_url VARCHAR(256) NOT NULL,
file_path VARCHAR(256),
channel_id CHAR(36) NOT NULL REFERENCES podcast_channel(id),
channel_id UUID NOT NULL REFERENCES podcast_channel(id),
title VARCHAR(256),
description VARCHAR(256),
duration VARCHAR(8),
status TINYINT NOT NULL,
publish_date TIMESTAMP,
created TIMESTAMP NOT NULL
error_message VARCHAR(256),
created TIMESTAMP NOT NULL,
size INTEGER,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT
);
CREATE INDEX IF NOT EXISTS index_episode_channel_id_fk ON podcast_channel(id);
CREATE INDEX IF NOT EXISTS index_episode_status ON podcast_episode(status);

View File

@ -182,10 +182,18 @@ CREATE TABLE IF NOT EXISTS podcast_episode (
channel_id CHAR(36) NOT NULL REFERENCES podcast_channel,
title VARCHAR(256),
description VARCHAR(256),
duration VARCHAR(8),
duration VARCHAR(12),
status TINYINT NOT NULL,
publish_date DATETIME,
created DATETIME NOT NULL
error_message VARCHAR(256),
created DATETIME NOT NULL,
size INT,
suffix VARCHAR(8),
bitrate VARCHAR(16),
content_type VARCHAR(64),
cover_art VARCHAR(256),
genre VARCHAR(16),
year SMALLINT
);
CREATE INDEX IF NOT EXISTS index_episode_channel_id_fk ON podcast_channel(id);
CREATE INDEX IF NOT EXISTS index_episode_status_id_fk ON podcast_episode(status);

View File

@ -39,6 +39,7 @@ class PodcastTestCase(ApiTestBase):
self.assertEqual(channel.description, description)
self.assertEqual(channel.error_message, error_message)
@db_session
def test_create_podcast_channel(self):
# test for non-admin access
self._make_request(
@ -51,19 +52,35 @@ class PodcastTestCase(ApiTestBase):
self._make_request("createPodcastChannel", error=10)
self._make_request("createPodcastChannel", {"url": "bad url"}, error=10)
# create w/ required fields
url = "file://" + os.path.join(os.path.dirname(__file__), "../fixtures/rssfeed.xml")
# create w/o required fields
url = "file://" + os.path.join(os.path.dirname(__file__), "../fixtures/rssfeeds/empty.xml")
self._make_request("createPodcastChannel", {"url": url}, skip_post=True, error=10)
# create w/ required fields without episodes
url = "file://" + os.path.join(os.path.dirname(__file__), "../fixtures/rssfeeds/waitwait-noeps.xml")
self._make_request("createPodcastChannel", {"url": url}, skip_post=True)
self.assertDbCountEqual(PodcastChannel, 1)
self.assertDbCountEqual(PodcastEpisode, 0)
PodcastChannel.select().delete()
# create w/ required fields with episodes
feeds = { "waitwait.xml": 20, "planetmoney.xml": 6 }
for feed, count in feeds.items():
url = "file://" + os.path.join(os.path.dirname(__file__), "../fixtures/rssfeeds/" + feed)
self._make_request("createPodcastChannel", {"url": url}, skip_post=True)
self.assertDbCountEqual(PodcastChannel, 1)
self.assertDbCountEqual(PodcastEpisode, 20)
self.assertDbCountEqual(PodcastEpisode, count)
with db_session:
self.assertPodcastChannelEquals(PodcastChannel.select().first(), url, PodcastStatus.new.value)
for episode in PodcastEpisode.select():
self.assertEqual(episode.status, PodcastStatus.new.value)
PodcastChannel.select().delete()
PodcastEpisode.select().delete()
@db_session
def test_delete_podcast_channel(self):
# test for non-admin access
self._make_request(
@ -78,7 +95,6 @@ class PodcastTestCase(ApiTestBase):
self._make_request("deletePodcastChannel", {"id": str(uuid.uuid4())}, error=70)
# delete
with db_session:
channel = PodcastChannel(
url="https://example.local/podcast/delete",
status=PodcastStatus.new.value,
@ -88,7 +104,6 @@ class PodcastTestCase(ApiTestBase):
self.assertDbCountEqual(PodcastChannel, 1)
with db_session:
self.assertEqual(PodcastStatus.deleted.value, PodcastChannel[channel.id].status)
@db_session

5
tests/fixtures/rssfeeds/empty.xml vendored Normal file
View File

@ -0,0 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<!-- this should have at least 'title' to be valid -->
<channel></channel>
</rss>

134
tests/fixtures/rssfeeds/planetmoney.xml vendored Normal file
View File

@ -0,0 +1,134 @@
<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:npr="https://www.npr.org/rss/" xmlns:nprml="https://api.npr.org/nprml" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
<channel>
<title>Planet Money</title>
<link>https://www.npr.org/planetmoney</link>
<description><![CDATA[The economy explained. Imagine you could call up a friend and say, "Meet me at the bar and tell me what's going on with the economy." Now imagine that's actually a fun evening.]]></description>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<generator>NPR API RSS Generator 0.94</generator>
<language>en</language>
<itunes:summary><![CDATA[The economy explained. Imagine you could call up a friend and say, "Meet me at the bar and tell me what's going on with the economy." Now imagine that's actually a fun evening.]]></itunes:summary>
<itunes:author>NPR</itunes:author>
<itunes:block>no</itunes:block>
<itunes:owner>
<itunes:email>podcasts@npr.org</itunes:email>
<itunes:name>NPR</itunes:name>
</itunes:owner>
<itunes:category text="Business"/>
<itunes:category text="News"/>
<itunes:image href="https://media.npr.org/assets/img/2018/08/02/npr_planetmoney_podcasttile_sq-7b7fab0b52fd72826936c3dbe51cff94889797a0.jpg?s=1400"/>
<itunes:type>episodic</itunes:type>
<image>
<url>https://media.npr.org/assets/img/2018/08/02/npr_planetmoney_podcasttile_sq-7b7fab0b52fd72826936c3dbe51cff94889797a0.jpg?s=1400</url>
<title>Planet Money</title>
<link>https://www.npr.org/planetmoney</link>
</image>
<lastBuildDate>Fri, 14 Aug 2020 15:31:33 -0400</lastBuildDate>
<item>
<title>Big Rigged</title>
<description><![CDATA[Driving a truck used to mean freedom. Now it means a mountain of debt. Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money">here</a>. ]]></description>
<pubDate>Fri, 14 Aug 2020 15:31:33 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">003a12a1-5b32-4242-89af-9d2fadd3d851</guid>
<link>https://www.npr.org/2020/08/10/901110994/big-rigged</link>
<itunes:title>Big Rigged</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary>Trucking companies have been underpaying workers for years. And now they've found a way to get them to buy the trucks too. </itunes:summary>
<itunes:subtitle>Trucking companies have been underpaying workers for years. And now they've found a way to get them to buy the trucks too. </itunes:subtitle>
<itunes:image href="https://media.npr.org/assets/img/2020/08/14/gettyimages-535791583_wide-5bbf3c810e95fd1ef2cab2b0a0703af4ffc9c5e5.jpg?s=1400"/>
<itunes:duration>1483</itunes:duration>
<itunes:explicit>no</itunes:explicit>
<itunes:episodeType>full</itunes:episodeType>
<content:encoded><![CDATA[Driving a truck used to mean freedom. Now it means a mountain of debt. Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money">here</a>. ]]></content:encoded>
<enclosure url="https://play.podtrac.com/npr-510289/edge1.pod.npr.org/anon.npr-mp3/npr/pmoney/2020/08/20200814_pmoney_pmpod1025_1.mp3?awCollectionId=510289&amp;awEpisodeId=901110994&amp;orgId=1&amp;topicId=1017&amp;d=1483&amp;p=510289&amp;story=901110994&amp;t=podcast&amp;e=901110994&amp;size=23676843&amp;ft=pod&amp;f=510289" length="23676843" type="audio/mpeg"/>
</item>
<item>
<title>SUMMER SCHOOL 6: Taxes &amp; Donald Duck</title>
<description><![CDATA[The surprisingly entertaining history of the income tax.]]></description>
<pubDate>Wed, 12 Aug 2020 16:21:09 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">77a75311-e38c-482c-bc0e-709510464ea3</guid>
<link>https://www.npr.org/2020/08/12/901837703/summer-school-6-taxes-donald-duck</link>
<itunes:title>SUMMER SCHOOL 6: Taxes &amp; Donald Duck</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary><![CDATA[The surprisingly entertaining history of the income tax.]]></itunes:summary>
<itunes:image href="https://media.npr.org/assets/img/2020/08/12/6therriousdavis_planetmoney_wide-08bee0e21891ecd46e4a2fc956655f0eb9c5cafd.jpg?s=1400"/>
<itunes:duration>1661</itunes:duration>
<itunes:explicit>no</itunes:explicit>
<itunes:episodeType>full</itunes:episodeType>
<content:encoded><![CDATA[The surprisingly entertaining history of the income tax.]]></content:encoded>
<enclosure url="https://play.podtrac.com/npr-510289/edge1.pod.npr.org/anon.npr-mp3/npr/pmoney/2020/08/20200812_pmoney_pmpod1023.mp3?awCollectionId=510289&amp;awEpisodeId=901837703&amp;orgId=1&amp;d=1661&amp;p=510289&amp;story=901837703&amp;t=podcast&amp;e=901837703&amp;size=26529957&amp;ft=pod&amp;f=510289" length="26529957" type="audio/mpeg"/>
</item>
<item>
<title>Mask Communication</title>
<description><![CDATA[Why won't some people wear masks? Is there anything we can do to convince them? We look to behavioral economics for help. | Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money?utm_source=rss_feed_copy&utm_medium=podcast&utm_term=planet_money">here</a>.]]></description>
<pubDate>Fri, 07 Aug 2020 16:58:06 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">4837421e-6eac-48da-91ca-0191045b725c</guid>
<link>https://www.npr.org/2020/08/07/900273012/mask-communication</link>
<itunes:title>Mask Communication</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary>Behavioral economists have helped us smoke less and save more. Can they help us understand why some people won't wear masks, and find ways to get them to want to?</itunes:summary>
<itunes:subtitle>Behavioral economists have helped us smoke less and save more. Can they help us understand why some people won't wear masks, and find ways to get them to want to?</itunes:subtitle>
<itunes:image href="https://media.npr.org/assets/img/2020/08/07/gettyimages-1215037111_wide-f436d18533d519baacfb2add6f4b05cfc7d9b536.jpg?s=1400"/>
<itunes:duration>1586</itunes:duration>
<itunes:explicit>no</itunes:explicit>
<itunes:episodeType>full</itunes:episodeType>
<content:encoded><![CDATA[Why won't some people wear masks? Is there anything we can do to convince them? We look to behavioral economics for help. | Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money?utm_source=rss_feed_copy&utm_medium=podcast&utm_term=planet_money">here</a>.]]></content:encoded>
<enclosure url="https://play.podtrac.com/npr-510289/edge1.pod.npr.org/anon.npr-podcasts/podcast/npr/pmoney/2020/08/20200807_pmoney_pmpod1023-888aea1d-9e01-4765-a029-0fde7ae692f6.mp3?awCollectionId=510289&amp;awEpisodeId=900273012&amp;aw_0_1st.cv=yes&amp;orgId=1&amp;topicId=1128&amp;aggIds=812054919&amp;d=1586&amp;p=510289&amp;story=900273012&amp;t=podcast&amp;e=900273012&amp;size=25328369&amp;ft=pod&amp;f=510289" length="25328369" type="audio/mpeg"/>
</item>
<item>
<title>SUMMER SCHOOL 5: Trade &amp; Santa</title>
<description><![CDATA[The economics of free trade and what happens when governments get involved.]]></description>
<pubDate>Wed, 05 Aug 2020 16:27:58 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">219f4641-19a2-4a36-bd5c-623108875592</guid>
<link>https://www.npr.org/2020/08/05/899393029/summer-school-5-trade-santa</link>
<itunes:title>SUMMER SCHOOL 5: Trade &amp; Santa</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary><![CDATA[The economics of free trade and what happens when governments get involved.]]></itunes:summary>
<itunes:image href="https://media.npr.org/assets/img/2020/08/05/5therriousdavis_planetmoney-santa_wide-20328bf842207fc48720e009b1b451da24f257b9.jpg?s=1400"/>
<itunes:duration>1584</itunes:duration>
<itunes:explicit>no</itunes:explicit>
<itunes:episodeType>full</itunes:episodeType>
<content:encoded><![CDATA[The economics of free trade and what happens when governments get involved.]]></content:encoded>
<enclosure url="https://play.podtrac.com/npr-510289/edge1.pod.npr.org/anon.npr-mp3/npr/pmoney/2020/08/20200805_pmoney_pmpod1021.mp3?awCollectionId=510289&amp;awEpisodeId=899393029&amp;orgId=1&amp;d=1584&amp;p=510289&amp;story=899393029&amp;t=podcast&amp;e=899393029&amp;size=25293135&amp;ft=pod&amp;f=510289" length="25293135" type="audio/mpeg"/>
</item>
<item>
<title>College Fails</title>
<description><![CDATA[The pandemic is transforming college from a can't-miss into a can't-attend experience. Can colleges survive? | Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money?utm_source=rss_feed_copy&utm_medium=podcast&utm_term=planet_money">here</a>.]]></description>
<pubDate>Fri, 31 Jul 2020 19:32:55 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">01b0506e-cfd5-462d-b07e-05904a8104b1</guid>
<link>https://www.npr.org/2020/07/31/897983620/college-fails</link>
<itunes:title>College Fails</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary>With a month to go before the fall semester starts, universities are closing due to coronavirus, and also making hard cuts and tradeoffs around remote learning.</itunes:summary>
<itunes:subtitle>With a month to go before the fall semester starts, universities are closing due to coronavirus, and also making hard cuts and tradeoffs around remote learning.</itunes:subtitle>
<itunes:image href="https://media.npr.org/assets/img/2020/07/31/rbs-100-rock_wide-c67a4fbc768b75b5a856bde3f16038457918fce4.jpg?s=1400"/>
<itunes:duration>1586</itunes:duration>
<itunes:explicit>no</itunes:explicit>
<itunes:episodeType>full</itunes:episodeType>
<content:encoded><![CDATA[The pandemic is transforming college from a can't-miss into a can't-attend experience. Can colleges survive? | Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money?utm_source=rss_feed_copy&utm_medium=podcast&utm_term=planet_money">here</a>.]]></content:encoded>
<enclosure url="https://play.podtrac.com/npr-510289/edge1.pod.npr.org/anon.npr-mp3/npr/pmoney/2020/07/20200731_pmoney_pmpod1021.mp3?awCollectionId=510289&amp;awEpisodeId=897983620&amp;orgId=1&amp;topicId=1017&amp;d=1586&amp;p=510289&amp;story=897983620&amp;t=podcast&amp;e=897983620&amp;size=17683719&amp;ft=pod&amp;f=510289" length="17683719" type="audio/mpeg"/>
</item>
<item>
<title>SUMMER SCHOOL 4: Scarcity &amp; Pistachios</title>
<description><![CDATA[Class 4 brings us an economic conundrum: how do you efficiently share a scarce resource? | Subscribe to our weekly newsletter here. ]]></description>
<pubDate>Wed, 29 Jul 2020 18:14:21 -0400</pubDate>
<copyright>Copyright 2015-2020 NPR - For Personal Use Only</copyright>
<guid isPermalink="false">eaff3c77-d26e-44ed-a899-7e8ab3485de8</guid>
<link>https://www.npr.org/2020/07/28/896308345/summer-school-4-pistachios-scarcity</link>
<itunes:title>SUMMER SCHOOL 4: Scarcity &amp; Pistachios</itunes:title>
<itunes:author>NPR</itunes:author>
<itunes:summary>Learn about scarce resources and the tragedy of the commons from drought-stricken California.</itunes:summary>
<itunes:subtitle>Learn about scarce resources and the tragedy of the commons from drought-stricken California.</itunes:subtitle>
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<content:encoded><![CDATA[Class 4 brings us an economic conundrum: how do you efficiently share a scarce resource? | Subscribe to our weekly newsletter here. ]]></content:encoded>
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