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#!/usr/bin/env python
from http.server import SimpleHTTPRequestHandler, HTTPServer
from urllib import parse
from urllib.request import *
import argparse
import re
import json
import os
import requests
import xml.etree.ElementTree as ET
import base64
# Configuration
coolServerUrl = "http://localhost:9980"
solrServerUrl = "http://localhost:8983"
documentPath = "Docs/"
coolInstance = coolServerUrl + "/loleaflet/f6d368a0a/loleaflet.html"
solrCollectionName = "documents"
# Templates
solrSelectUrl = "{}/solr/{}/select".format(solrServerUrl, solrCollectionName)
solrUpdateUrl = "{}/solr/{}/update?commit=true".format(solrServerUrl, solrCollectionName)
# Transform the LO indexing XML structure to Solr structure
def transformToSolrFormat(xmlContent, filename):
root = ET.fromstring(xmlContent)
builder = ET.TreeBuilder()
builder.start("add", {})
for entry in root:
if entry.tag == 'paragraph' or entry.tag == 'object':
builder.start("doc", {})
builder.start("field", {"name" : "filename"})
builder.data(filename)
builder.end("filed")
builder.start("field", {"name" : "type"})
builder.data(entry.tag)
builder.end("field")
for attribute in entry.attrib:
builder.start("field", {"name" : attribute})
builder.data(entry.attrib[attribute])
builder.end("field")
builder.start("field", {"name" : "content"})
builder.data(entry.text)
builder.end("field")
builder.end("doc")
builder.end("add")
et = ET.ElementTree(builder.close())
ET.indent(et, space=" ", level=0)
return ET.tostring(et.getroot(), encoding='utf-8', xml_declaration=True)
# Create Solr XML to remove all entries from the database
def createSolrDeleteXml():
builder = ET.TreeBuilder()
builder.start("update", {})
builder.start("delete", {})
builder.start("query", {})
builder.data("*:*")
builder.end("query")
builder.end("delete")
builder.end("update")
et = ET.ElementTree(builder.close())
ET.indent(et, space=" ", level=0)
return ET.tostring(et.getroot(), encoding='utf-8', xml_declaration=True)
# Calls "Convert To - Indexing XML" service on COOL Server
def callConvertToIndexingXml(filename, filepath):
filesDict = {
'data': (filepath, open(filepath, 'rb'), None, {})
}
response = requests.post("{}/lool/convert-to/xml".format(coolServerUrl), files=filesDict)
if response.ok:
return response.content
return None
# Reindex all documents
def runReindexProcess():
headers = {'Content-Type' : 'text/xml'}
# remove existing entries from the database
requests.post(solrUpdateUrl, data=createSolrDeleteXml(), headers=headers)
# add the new indices into SOLR server
for document in getDocuments():
filename = document['name']
xmlContent = callConvertToIndexingXml(filename, documentPath + filename)
if xmlContent:
# add indexing XML values
headers = {'Content-Type' : 'text/xml'}
solrTransformed = transformToSolrFormat(xmlContent, filename)
response = requests.post(solrUpdateUrl, data=solrTransformed, headers=headers)
if not response.ok:
return False
return True
# Search/Query on Solr
def callQueryServiceOnSolr(jsonString):
searchStructure = json.loads(jsonString)
query = searchStructure['query']
response = requests.get("{}?rows=50&q=content:{}".format(solrSelectUrl, query))
result = response.json()
responseBody = result['response']
if responseBody['numFound'] > 0:
for document in responseBody['docs']:
type = document['type'][0]
filename = document['filename'][0]
href = "{}?file_path=file://{}".format(coolInstance, os.path.abspath(documentPath + filename))
if type == "paragraph":
returnMap = {
'filename' : filename,
'href' : href,
'type' : document['type'][0],
'index' : document['index'][0],
'node_type' : document['node_type'][0],
'content' : document['content'][0]
}
if 'object_name' in document:
returnMap['object_name'] = document['object_name'][0]
yield returnMap
# Gets all the available documents contained in the document path
def getDocuments():
with os.scandir(documentPath) as entries:
for entry in entries:
if entry.is_file():
yield {
"name" : entry.name,
"href" : "{}?file_path=file://{}".format(coolInstance, os.path.abspath(documentPath + entry.name))
}
# Calls "Render Search Result" service on COOL Server
# Input is search result and the document, and return the rendered image
def callRenderImageService(resultJsonString):
result = json.loads(resultJsonString)
filename = result['filename']
# Enclose json with [] - as the server supports more search results, which are then combined
resultJsonProcessed = '[ ' + resultJsonString.decode('utf-8') + ' ]'
filesDict = {
"document": (filename, open(documentPath + filename, 'rb'), None, {}),
"result" : ("json", resultJsonProcessed, None, {})
}
response = requests.post("{}/lool/render-search-result".format(coolServerUrl), files=filesDict)
return base64.b64encode(response.content)
# HTTP Server - Handle HTTP requests
class HTTPRequestHandler(SimpleHTTPRequestHandler):
def handleImageRequest(self):
jsonString = self.rfile.read(int(self.headers['Content-Length']))
imageBase64 = callRenderImageService(jsonString)
if imageBase64:
self.send_response(200)
else:
self.send_response(403)
self.end_headers()
if imageBase64:
self.wfile.write(imageBase64)
def handleReindexRequest(self):
if runReindexProcess():
self.send_response(200)
else:
self.send_response(403)
self.end_headers()
def handleSearchRequest(self):
jsonString = self.rfile.read(int(self.headers['Content-Length']))
searchResult = [i for i in callQueryServiceOnSolr(jsonString)]
if searchResult:
self.send_response(200)
else:
self.send_response(403)
self.end_headers()
if searchResult:
data = json.dumps(searchResult)
self.wfile.write(data.encode('utf8'))
def handleDocumentsRequest(self):
self.send_response(200)
self.send_header('Content-Type', 'application/json')
self.end_headers()
data = json.dumps([i for i in getDocuments()])
self.wfile.write(data.encode('utf8'))
def do_POST(self):
if re.search('/search', self.path):
self.handleSearchRequest()
elif re.search('/reindex', self.path):
self.handleReindexRequest()
elif re.search('/image', self.path):
self.handleImageRequest()
else:
self.send_response(403)
self.end_headers()
def do_GET(self):
if self.path == '/':
self.path = '/Main.html'
elif re.search('/documents', self.path):
self.handleDocumentsRequest()
else:
return SimpleHTTPRequestHandler.do_GET(self)
#run with "python Server.py 8000 127.0.0.1"
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='HTTP Server')
parser.add_argument('port', type=int, default=8000, help='Listening port for HTTP Server')
parser.add_argument('ip', default="127.0.0.1", help='HTTP Server IP')
args = parser.parse_args()
server = HTTPServer((args.ip, args.port), HTTPRequestHandler)
print('HTTP Server Running...........')
server.serve_forever()
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