123 lines
4.9 KiB
Python
Executable File
123 lines
4.9 KiB
Python
Executable File
#!/usr/bin/env python3
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# You can test it with:
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# curl --request POST --data string=foobar\&what=language http://localhost:4000
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import wsgiref.simple_server as server
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import urllib.parse
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# PostgreSQL interface
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import psycopg2
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# HTML templates http://www.yattag.org/
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from yattag import Doc
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PORT = 4000
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REDIRECTION_URL = "https://www.langtag.net/registries/registry-html" # For
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# local testing: Firefox apparently does not accept a redirect to a
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# file.
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def pack(start_response, status, title, body, headers = []):
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doc, tag, text = Doc().tagtext()
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doc.asis("<?xml version=\"1.0\" ?>\n")
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doc.asis("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">")
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with tag("html", ("xml:lang", "en"), lang = "en", xmlns = "http://www.w3.org/1999/xhtml"):
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with tag("head"):
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with tag("title"):
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text(title)
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with tag("body"):
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doc.asis(body.getvalue())
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data = doc.getvalue()
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datae = data.encode()
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response_headers = [("Content-type", "text/html; charset=UTF-8"),
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("Content-Length", str(len(datae)))]
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if headers != []:
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for header in headers:
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response_headers.append(header)
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start_response(status, response_headers)
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return [datae]
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def application(environ, start_response):
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if environ["REQUEST_METHOD"] != "POST":
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status = "405 Method unavailable"
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msg = "Unsupported HTTP method \"%s\"\r\n" % environ["REQUEST_METHOD"]
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doc, tag, text = Doc().tagtext()
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with tag("p"):
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text(msg)
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return pack(start_response, status, msg, doc)
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try:
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body_size = int(environ.get("CONTENT_LENGTH", 0))
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except (ValueError):
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body_size = 0
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body = environ["wsgi.input"].read(body_size)
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query = urllib.parse.parse_qsl(body.decode())
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form = {}
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headers = []
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for q in query:
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form[q[0]] = q[1]
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for mandatory in ["string", "what"]:
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if mandatory not in form:
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status = "400 Invalid request"
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msg = "Missing \"%s\" in request\r\n" % mandatory
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doc, tag, text = Doc().tagtext()
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with tag("p"):
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text(msg)
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return pack(start_response, status, msg, doc)
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if form["what"] == "language":
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sql = "SELECT code,suppressscript,preferredvalue,added,comments FROM Languages WHERE code = %s"
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term = form["string"].lower()
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elif form["what"] == "script":
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sql = "SELECT code,added,comments FROM Scripts WHERE code = %s"
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term = form["string"].capitalize()
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else:
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status = "400 Invalid request"
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msg = "Unknown search category \"%s\"\r\n" % form["what"]
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doc, tag, text = Doc().tagtext()
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with tag("p"):
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text(msg)
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return pack(start_response, status, msg, doc)
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cursor.execute(sql, (term, ))
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mytuple = cursor.fetchone()
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status = "200 OK"
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doc, tag, text = Doc().tagtext()
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title = "Result for %s" % term
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if mytuple is not None:
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status = "308 Redirect"
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url = "%s/%s/%s.html" % (REDIRECTION_URL, form["what"], mytuple[0])
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headers.append(("Location", url))
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msg = "Redirect to %s\r\n" % (url)
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with tag("p"):
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text("Redirect to ")
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with tag("a", href = url):
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text(url)
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text("\r\n")
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else:
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if form["what"] == "language":
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sql = "SELECT Languages.code, Descriptions.description FROM Languages,Descriptions_Languages,Descriptions WHERE Descriptions_Languages.description = Descriptions.id AND Descriptions_Languages.lang = Languages.code AND position(%s in lower(Descriptions.description)) > 0;"
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elif form["what"] == "script":
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sql = "SELECT Scripts.code, Descriptions.description FROM Scripts,Descriptions_Scripts,Descriptions WHERE Descriptions_Scripts.description = Descriptions.id AND Descriptions_Scripts.script = Scripts.code AND position(%s in lower(Descriptions.description)) > 0;"
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cursor.execute(sql, (form["string"], ))
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found = False
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with tag("h1"):
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text("Results for %s" % form["string"])
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with tag("p"):
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with tag("ul"):
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for tuple in cursor.fetchall():
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code = tuple[0]
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description = tuple[1]
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with tag("li"):
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with tag("a", href = "%s/%s/%s.html" % (REDIRECTION_URL, form["what"], code)):
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text("%s: %s\r\n" % (code, description))
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found = True
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if not found:
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with tag("li"):
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text("\"%s\" not found\r\n" % term)
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return pack(start_response, status, title, doc, headers)
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if __name__ == "__main__":
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conn = psycopg2.connect("dbname=lsr")
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cursor = conn.cursor()
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httpd = server.make_server("", PORT, application)
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print("Listening on port %s" % PORT)
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httpd.serve_forever()
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