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Basic CSV export, refs #266

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Tables and custom SQL query results can now be exported as CSV.

The easiest way to do this is to use the .csv extension, e.g.

	/test_tables/facet_cities.csv

By default this is served as Content-Type: text/plain so you can see it in
your browser. If you want to download the file (using text/csv and with an
appropriate Content-Disposition: attachment header) you can do so like this:

	/test_tables/facet_cities.csv?_dl=1

We link to the CSV and downloadable CSV URLs from the table and query pages.

The links use ?_size=max and so by default will return 1,000 rows.

Also fixes #303 - table names ending in .json or .csv are now detected and
URLs are generated that look like this instead:

	/test_tables/table%2Fwith%2Fslashes.csv?_format=csv

The ?_format= option is available for everything else too, but we link to the
.csv / .json versions in most cases because they are aesthetically pleasing.
This commit is contained in:
Simon Willison 2018-06-14 23:51:23 -07:00
commit 3a79ad98ea
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12 changed files with 243 additions and 38 deletions
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21
datasette/app.py
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@ -224,6 +224,9 @@ class Datasette:
conn.execute('PRAGMA cache_size=-{}'.format(self.config["cache_size_kb"]))
pm.hook.prepare_connection(conn=conn)
def table_exists(self, database, table):
return table in self.inspect().get(database, {}).get("tables")
def inspect(self):
" Inspect the database and return a dictionary of table metadata "
if self._inspect:
@ -395,7 +398,7 @@ class Datasette:
self.jinja_env.filters["escape_sqlite"] = escape_sqlite
self.jinja_env.filters["to_css_class"] = to_css_class
pm.hook.prepare_jinja2_environment(env=self.jinja_env)
app.add_route(IndexView.as_view(self), "/<as_json:(\.jsono?)?$>")
app.add_route(IndexView.as_view(self), "/<as_format:(\.jsono?)?$>")
# TODO: /favicon.ico and /-/static/ deserve far-future cache expires
app.add_route(favicon, "/favicon.ico")
app.static("/-/static/", str(app_root / "datasette" / "static"))
@ -408,37 +411,37 @@ class Datasette:
app.static(modpath, plugin["static_path"])
app.add_route(
JsonDataView.as_view(self, "inspect.json", self.inspect),
"/-/inspect<as_json:(\.json)?$>",
"/-/inspect<as_format:(\.json)?$>",
)
app.add_route(
JsonDataView.as_view(self, "metadata.json", lambda: self.metadata),
"/-/metadata<as_json:(\.json)?$>",
"/-/metadata<as_format:(\.json)?$>",
)
app.add_route(
JsonDataView.as_view(self, "versions.json", self.versions),
"/-/versions<as_json:(\.json)?$>",
"/-/versions<as_format:(\.json)?$>",
)
app.add_route(
JsonDataView.as_view(self, "plugins.json", self.plugins),
"/-/plugins<as_json:(\.json)?$>",
"/-/plugins<as_format:(\.json)?$>",
)
app.add_route(
JsonDataView.as_view(self, "config.json", lambda: self.config),
"/-/config<as_json:(\.json)?$>",
"/-/config<as_format:(\.json)?$>",
)
app.add_route(
DatabaseView.as_view(self), "/<db_name:[^/\.]+?><as_json:(\.jsono?)?$>"
DatabaseView.as_view(self), "/<db_name:[^/\.]+?><as_format:(\.jsono?|\.csv)?$>"
)
app.add_route(
DatabaseDownload.as_view(self), "/<db_name:[^/]+?><as_db:(\.db)$>"
)
app.add_route(
TableView.as_view(self),
"/<db_name:[^/]+>/<table:[^/]+?><as_json:(\.jsono?)?$>",
"/<db_name:[^/]+>/<table_and_format:[^/]+?$>",
)
app.add_route(
RowView.as_view(self),
"/<db_name:[^/]+>/<table:[^/]+?>/<pk_path:[^/]+?><as_json:(\.jsono?)?$>",
"/<db_name:[^/]+>/<table:[^/]+?>/<pk_path:[^/]+?><as_format:(\.jsono?)?$>",
)
self.register_custom_units()