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__author__ = 'Manuela Kuhn <manuela.kuhn@desy.de>', 'Jan Garrevoet <jan,garrevoet@desy.de>'
import zmq
import os
import sys
import logging
import cPickle
import urllib
import requests
import re
import urllib2
import time
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def setup (log, prop):
#TODO
# check if prop has correct format
prop["session"] = requests.session()
def getMetadata (log, metadata, chunkSize, localTarget = None):
#extract fileEvent metadata
try:
#TODO validate metadata dict
filename = metadata["filename"]
sourcePath = metadata["sourcePath"]
relativePath = metadata["relativePath"]
except:
log.error("Invalid fileEvent message received.", exc_info=True)
log.debug("metadata=" + str(metadata))
#skip all further instructions and continue with next iteration
raise
# no normpath used because that would transform http://... into http:/...
sourceFilePath = sourcePath + os.sep + relativePath
sourceFile = os.path.join(sourceFilePath, filename)
#TODO combine better with sourceFile... (for efficiency)
if localTarget:
targetFilePath = os.path.normpath(localTarget + os.sep + relativePath)
targetFile = os.path.join(targetFilePath, filename)
else:
targetFile = None
try:
log.debug("create metadata for source file...")
#metadata = {
# "filename" : filename,
# "sourcePath" : sourcePath,
# "relativePath" : relativePath,
# "chunkSize" : chunkSize
# }
metadata[ "chunkSize" ] = chunkSize
log.debug("metadata = " + str(metadata))
except:
log.error("Unable to assemble multi-part message.", exc_info=True)
raise
return sourceFile, targetFile, metadata
def sendData (log, targets, sourceFile, targetFile, metadata, openConnections, context, prop):
response = prop["session"].get(sourceFile)
try:
response.raise_for_status()
log.debug("Initiating http get for file '" + str(sourceFile) + "' succeded.")
except:
log.error("Initiating http get for file '" + str(sourceFile) + "' failed.", exc_info=True)
return
# if response.status_code != 200:
# self.log.error("Unable to get file " + sourceFile + ". Http status code was " + respconse.status_code)
try:
chunkSize = metadata[ "chunkSize" ]
except:
log.error("Unable to get chunkSize", exc_info=True)
if prop["storeFlag"]:
try:
log.debug("Opening '" + str(targetFile) + "'...")
fileDescriptor = open(str(targetFile), "wb")
except IOError, e:
# errno.ENOENT == "No such file or directory"
if e.errno == errno.ENOENT:
#TODO create subdirectory first, then try to open the file again
try:
targetPath = os.path.normpath(prop["localTarget"] + os.sep + metadata["relativePath"])
os.makedirs(targetPath)
newFile = open(targetFile, "w")
log.info("New target directory created: " + str(targetPath))
except:
log.error("Unable to open target file '" + targetFile + "'.", exc_info=True)
log.debug("targetPath:" + str(targetPath))
raise
else:
log.error("Unable to open target file '" + targetFile + "'.", exc_info=True)
except:
log.error("Unable to open target file '" + targetFile + "'.", exc_info=True)
log.debug("e.errno = " + str(e.errno) + " errno.EEXIST==" + str(errno.EEXIST))
chunkNumber = 0
log.debug("Getting data for file '" + str(sourceFile) + "'...")
#reading source file into memory
for data in response.iter_content(chunk_size=chunkSize):
log.debug("Packing multipart-message for file " + str(sourceFile) + "...")
try:
#assemble metadata for zmq-message
metadataExtended = metadata.copy()
metadataExtended["chunkNumber"] = chunkNumber
metadataExtended = cPickle.dumps(metadataExtended)
payload = []
payload.append(metadataExtended)
payload.append(data)
except:
log.error("Unable to pack multipart-message for file " + str(sourceFile), exc_info=True)
if prop["storeFlag"]:
fileDescriptor.write(data)
__sendToTargets(log, targets, sourceFile, targetFile, openConnections, metadataExtended, payload, context)
log.debug("Passing multipart-message for file " + str(sourceFile) + "...done.")
except:
log.error("Unable to send multipart-message for file " + str(sourceFile), exc_info=True)
if prop["storeFlag"]:
try:
log.debug("Closing '" + str(targetFile) + "'...")
fileDescriptor.close()
except:
log.error("Unable to close target file '" + str(targetFile) + "'.", exc_info=True)
raise
def finishDataHandling (log, sourceFile, targetFile, prop):
if prop["removeFlag"]:
pass
#TODO delete file from detector after sending
# responce = requests.delete(sourceFile)
# try:
# responce.raise_for_status()
# log.debug("Deleting file " + str(sourceFile) + " succeded.")
# except:
# log.error("Deleting file " + str(sourceFile) + " failed.", exc_info=True)
# remove file
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def clean (prop):
pass
if __name__ == '__main__':
from shutil import copyfile
import subprocess
try:
BASE_PATH = os.path.dirname ( os.path.dirname ( os.path.dirname ( os.path.dirname ( os.path.realpath ( __file__ ) ))))
except:
BASE_PATH = os.path.dirname ( os.path.dirname ( os.path.dirname ( os.path.dirname ( os.path.abspath ( sys.argv[0] ) ))))
print "BASE_PATH", BASE_PATH
SHARED_PATH = BASE_PATH + os.sep + "src" + os.sep + "shared"
if not SHARED_PATH in sys.path:
sys.path.append ( SHARED_PATH )
del SHARED_PATH
import helpers
logfile = BASE_PATH + os.sep + "logs" + os.sep + "getFromHttp.log"
logsize = 10485760
# Get the log Configuration for the lisener
h1, h2 = helpers.getLogHandlers(logfile, logsize, verbose=True, onScreenLogLevel="debug")
# Create log and set handler to queue handle
root = logging.getLogger()
root.setLevel(logging.DEBUG) # Log level = DEBUG
root.addHandler(h1)
root.addHandler(h2)
receivingPort = "6005"
receivingPort2 = "6006"
extIp = "0.0.0.0"
dataFwPort = "50010"
context = zmq.Context.instance()
receivingSocket = context.socket(zmq.PULL)
connectionStr = "tcp://{ip}:{port}".format( ip=extIp, port=receivingPort )
receivingSocket.bind(connectionStr)
logging.info("=== receivingSocket connected to " + connectionStr)
receivingSocket2 = context.socket(zmq.PULL)
connectionStr = "tcp://{ip}:{port}".format( ip=extIp, port=receivingPort2 )
receivingSocket2.bind(connectionStr)
logging.info("=== receivingSocket2 connected to " + connectionStr)
prework_sourceFile = BASE_PATH + os.sep + "test_file.cbf"
localTarget = BASE_PATH + os.sep + "data" + os.sep + "target"
#read file to send it in data pipe
logging.debug("=== copy file to lsdma-lab04")
# os.system('scp "%s" "%s:%s"' % (localfile, remotehost, remotefile) )
subprocess.call("scp " + prework_sourceFile + " root@lsdma-lab04:/var/www/html/test_httpget/data", shell=True)
workload = {
"sourcePath" : "http://192.168.138.37/data",
"relativePath": "testp06",
"filename" : "35_data_000170.h5"
# workload = {
# "sourcePath" : "http://131.169.55.170/test_httpget/data",
# "relativePath": "",
# "filename" : "test_file.cbf"
# }
targets = [['localhost:' + receivingPort, 1, "data"], ['localhost:' + receivingPort2, 1, "data"]]
chunkSize = 10485760 ; # = 1024*1024*10 = 10 MiB
localTarget = BASE_PATH + os.sep + "data" + os.sep + "target"
openConnections = dict()
dataFetcherProp = {
"type" : "getFromHttp",
"session" : None,
"storeFlag" : True,
"removeFlag" : False
}
setup(logging, dataFetcherProp)
sourceFile, targetFile, metadata = getMetadata (logging, workload, chunkSize, localTarget)
# sourceFile = "http://131.169.55.170/test_httpget/data/test_file.cbf"
sendData(logging, targets, sourceFile, targetFile, metadata, openConnections, context, dataFetcherProp)
finishDataHandling(logging, sourceFile, targetFile, dataFetcherProp)
logging.debug("openConnections after function call: " + str(openConnections))
try:
recv_message = receivingSocket.recv_multipart()
logging.info("=== received: " + str(cPickle.loads(recv_message[0])))
recv_message = receivingSocket2.recv_multipart()
logging.info("=== received 2: " + str(cPickle.loads(recv_message[0])) + "\ndata-part: " + str(len(recv_message[1])))
except KeyboardInterrupt:
pass
finally:
receivingSocket.close(0)
receivingSocket2.close(0)
clean(dataFetcherProp)
context.destroy()