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Support for pre-fetched HTML/Markdown content.

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HTML output can be too large for the process called over the command
line. HTML data exchange now happens through an intermediate temporary
file.
This commit is contained in:
Fabio Manganiello 2020-06-25 01:37:59 +02:00
parent f50ad767e0
commit 96716dc872
2 changed files with 48 additions and 11 deletions
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29
platypush/plugins/http/webpage/__init__.py
View file

@ -2,6 +2,7 @@ import datetime
import json
import os
import subprocess
import tempfile
from platypush.plugins import action
from platypush.plugins.http.request import Plugin
@ -23,6 +24,14 @@ class HttpWebpagePlugin(Plugin):
_mercury_script = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'mercury-parser.js')
def _parse(self, proc):
output = ''
with subprocess.Popen(proc, stdout=subprocess.PIPE, stderr=None) as parser:
output = parser.communicate()[0].decode()
return output
@action
def simplify(self, url, type='html', html=None, outfile=None):
"""
@ -60,15 +69,27 @@ class HttpWebpagePlugin(Plugin):
"""
self.logger.info('Parsing URL {}'.format(url))
parser = subprocess.Popen(['node', self._mercury_script, url, type, html], stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
response = parser.stdout.read().decode().strip()
proc = ['node', self._mercury_script, url, type]
f = None
if html:
f = tempfile.NamedTemporaryFile('w+', delete=False)
f.write(html)
f.flush()
proc.append(f.name)
try:
response = json.loads(response)
response = self._parse(proc)
finally:
if f:
os.unlink(f.name)
try:
response = json.loads(response.strip())
except Exception as e:
raise RuntimeError('Could not parse JSON: {}. Response: {}'.format(str(e), response))
self.logger.info('Got response from Mercury API: {}'.format(response))
self.logger.debug('Got response from Mercury API: {}'.format(response))
title = response.get('title', '{} on {}'.format(
'Published' if response.get('date_published') else 'Generated',
response.get('date_published', datetime.datetime.now().isoformat())))

28
platypush/plugins/http/webpage/mercury-parser.js
View file

@ -6,22 +6,38 @@
'use strict';
const parser = require('@postlight/mercury-parser');
const fs = require('fs');
const Mercury = require('@postlight/mercury-parser');
if (process.argv.length < 3) {
console.error('Usage: ' + process.argv[1] + ' <url to parse> [markdown|html] [Pre-fetched content]');
console.error('Usage: ' + process.argv[1] + ' <url to parse> [markdown|html] [Pre-fetched HTML content file]');
process.exit(1);
}
const url = process.argv[2];
const type = process.argv[3] || 'html';
const content = process.argv[4];
const contentFile = process.argv[4];
const args = {
contentType: type,
html: content,
};
parser.parse(url, args).then(result => {
const parse = (url, args) => {
Mercury.parse(url, args).then(result => {
console.log(JSON.stringify(result));
});
});
};
if (contentFile) {
fs.readFile(contentFile, 'utf8', (err, data) => {
if (err) {
console.error(err);
process.exit(1);
}
args.html = data;
parse(url, args);
});
} else {
parse(url, args);
}