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#!/usr/bin/python3
import sys, re, sqlite3, json
import os.path
from http.server import HTTPServer, BaseHTTPRequestHandler
import urllib.parse
hostname = "localhost"
port = 8000
dbFile = "data/data.db"
imgDir = "../public/img/"
SEARCH_SUGG_LIMIT = 5
usageInfo = f"usage: {sys.argv[0]}\n"
usageInfo += "Starts a server that listens for GET requests to http://" + hostname + ":" + str(port) + ".\n"
usageInfo += "Responds to path+query /data/type1?name=name1 with JSON data.\n"
usageInfo += "\n"
usageInfo += "If type1 is 'node': Responds with map from names to objects representing node name1 and it's children.\n"
usageInfo += "If type1 is 'chain': Like 'node', but gets nodes from name1 up to the root, and their direct children.\n"
usageInfo += "If type1 is 'search': Responds with a tolnode name that has alt-name name1, or null.\n"
if len(sys.argv) > 1:
print(usageInfo, file=sys.stderr)
sys.exit(1)
# Connect to db, and load spellfix extension
dbCon = sqlite3.connect(dbFile)
dbCon.enable_load_extension(True)
dbCon.load_extension('./data/spellfix')
# Some functions
def lookupNodes(names):
nodeObjs = {}
cur = dbCon.cursor()
# Get node info
query = "SELECT name, children, parent, tips, p_support FROM nodes WHERE" \
" name IN ({})".format(",".join(["?"] * len(names)))
namesForImgs = []
firstSubnames = {}
secondSubnames = {}
for row in cur.execute(query, names):
name = row[0]
nodeObj = {
"children": json.loads(row[1]),
"parent": None if row[2] == "" else row[2],
"tips": row[3],
"pSupport": True if row[4] == 1 else False,
"commonName": None,
"imgName": None,
}
# Check for image file
match = re.fullmatch(r"\[(.+) \+ (.+)]", name)
if match == None:
namesForImgs.append(name)
else:
name1 = match.group(1)
name2 = match.group(2)
namesForImgs.extend([name1, name2])
firstSubnames[name1] = name
secondSubnames[name2] = name
# Add node object
nodeObjs[name] = nodeObj
# Get image names
query = "SELECT name, id FROM eol_ids WHERE" \
" name IN ({})".format(",".join(["?"] * len(namesForImgs)))
for [n, id] in cur.execute(query, namesForImgs):
filename = str(id) + ".jpg"
if not os.path.exists(imgDir + filename):
continue
if n in firstSubnames:
nodeName = firstSubnames[n]
nodeObjs[nodeName]["imgName"] = filename
elif n in secondSubnames:
nodeName = secondSubnames[n]
if nodeObjs[nodeName]["imgName"] == None:
nodeObjs[nodeName]["imgName"] = filename
else:
nodeObjs[n]["imgName"] = filename
# Get preferred-name info
query = "SELECT name, alt_name FROM names WHERE pref_alt = 1 AND" \
" name IN ({})".format(",".join(["?"] * len(names)))
for row in cur.execute(query, names):
[name, altName] = row
nodeObjs[name]["commonName"] = altName
#
return nodeObjs
def getNodeImg(name):
cur = dbCon.cursor()
row = cur.execute("SELECT name, id FROM eol_ids WHERE name = ?", (name,)).fetchone()
if row != None:
eolId = row[1]
filename = str(eolId) + ".jpg"
if os.path.exists(imgDir + filename):
return filename
return None
def lookupName(name):
cur = dbCon.cursor()
results = []
hasMore = False
#for row in cur.execute(
# "SELECT DISTINCT name, alt_name FROM names WHERE alt_name LIKE ? LIMIT ?",
# (name, SEARCH_SUGG_LIMIT)):
# results.append({"name": row[0], "altName": row[1]})
#for row in cur.execute(
# "SELECT DISTINCT names.name, names.alt_name, nodes.tips FROM" \
# " names INNER JOIN nodes ON names.name = nodes.name " \
# " WHERE alt_name LIKE ? ORDER BY nodes.tips DESC LIMIT ?",
# (name + "%", SEARCH_SUGG_LIMIT)):
# results.append({"name": row[0], "altName": row[1]})
for row in cur.execute(
"SELECT word, alt_name, name FROM" \
" spellfix_alt_names INNER JOIN names ON alt_name = word" \
" WHERE word MATCH ? LIMIT ?",
(name, SEARCH_SUGG_LIMIT)):
results.append({"name": row[2], "altName": row[0]})
if len(results) > SEARCH_SUGG_LIMIT:
hasMore = True
del results[-1]
return [results, hasMore]
def lookupNodeInfo(name):
cur = dbCon.cursor()
# Get node desc
row = cur.execute("SELECT desc, redirected from descs WHERE descs.name = ?", (name,)).fetchone()
desc = {"text": row[0], "fromRedirect": row[1] == 1} if row != None else None
# Get img info
imgInfoQuery = "SELECT eol_id, source_url, license, copyright_owner FROM" \
" images INNER JOIN eol_ids ON images.eol_id = eol_ids.id WHERE eol_ids.name = ?"
row = cur.execute(imgInfoQuery, (name,)).fetchone()
imgInfo = None
if row != None:
imgInfo = {"eolId": row[0], "sourceUrl": row[1], "license": row[2], "copyrightOwner": row[3]}
#
return {"desc": desc, "imgInfo": imgInfo}
class DbServer(BaseHTTPRequestHandler):
def do_GET(self):
# Parse URL
urlParts = urllib.parse.urlparse(self.path)
path = urllib.parse.unquote(urlParts.path)
queryDict = urllib.parse.parse_qs(urlParts.query)
# Check first element of path
match = re.match(r"/([^/]+)/(.+)", path)
if match != None and match.group(1) == "data" and "name" in queryDict:
reqType = match.group(2)
name = queryDict["name"][0]
# Check query string
if reqType == "node":
nodeObjs = lookupNodes([name])
if len(nodeObjs) > 0:
nodeObj = nodeObjs[name]
childNodeObjs = lookupNodes(nodeObj["children"])
childNodeObjs[name] = nodeObj
self.respondJson(childNodeObjs)
return
elif reqType == "chain":
results = {}
ranOnce = False
while True:
# Get node
nodeObjs = lookupNodes([name])
if len(nodeObjs) == 0:
if not ranOnce:
self.respondJson(results)
return
print("ERROR: Parent-chain node {} not found".format(name), file=sys.stderr)
break
nodeObj = nodeObjs[name]
results[name] = nodeObj
# Conditionally add children
if not ranOnce:
ranOnce = True
else:
childNamesToAdd = []
for childName in nodeObj["children"]:
if childName not in results:
childNamesToAdd.append(childName)
childNodeObjs = lookupNodes(childNamesToAdd)
results.update(childNodeObjs)
# Check if root
if nodeObj["parent"] == None:
self.respondJson(results)
return
else:
name = nodeObj["parent"]
elif reqType == "search":
self.respondJson(lookupName(name))
return
elif reqType == "info":
self.respondJson(lookupNodeInfo(name))
return
self.send_response(404)
self.end_headers()
self.end_headers()
def respondJson(self, val):
self.send_response(200)
self.send_header("Content-type", "application/json")
self.end_headers()
self.wfile.write(json.dumps(val).encode("utf-8"))
server = HTTPServer((hostname, port), DbServer)
print("Server started at http://{}:{}".format(hostname, port))
try:
server.serve_forever()
except KeyboardInterrupt:
pass
server.server_close()
dbCon.close()
print("Server stopped")
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