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The following Web server just returns a FASTA formatted
sequence, according to a given sequence identifier.
import os
import string
from BaseHTTPServer import HTTPServer
from BaseHTTPServer import BaseHTTPRequestHandler
class SeqHandler(BaseHTTPRequestHandler):
def do_GET(self):
seq_id = self.path
result = self.get_seq(seq_id)
if result is not None:
self.printCustomHTTPResponse(200)
else:
self.printCustomHTTPResponse(404)
self.wfile.write("<html>\n<body>\n")
self.wfile.write("<p>Request: " + seq_id + "</p>\n" )
if result is not None:
self.wfile.write("<pre>\n" )
self.wfile.write(result)
self.wfile.write("</pre>\n" )
self.wfile.write("\n</body>\n</html>\n")
def printCustomHTTPResponse(self, respcode):
self.send_response(respcode)
self.send_header("Content-Type", "text/html")
self.send_header("Server", "myHandler")
self.end_headers()
def get_seq(self, seq_id, db='sp'):
os.environ['PATH'] = '/usr/local/gensoft/bin' + ':' + os.environ['PATH']
cmd="golden " + db + ":" + seq_id
handle = os.popen(cmd, 'r')
entry = handle.readlines()
status = handle.close()
if status is not None:
return None
return string.join(entry, '')
if __name__ == "__main__":
server = HTTPServer(('',2113), SeqHandler)
for lp in range(5000):
server.handle_request()
How do you use this Web server?
How do you call the sequence identifier in Web parlance? Which standard
part of the request does it represent?
What do you think about this server? What is generally the role of
a Web server?
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