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''' |
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Internal functions related to the communication with the |
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OpenSubmit server. |
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''' |
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import os |
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import shutil |
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import os.path |
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import glob |
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import json |
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from .exceptions import * |
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from .filesystem import * |
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from .hostinfo import ipaddress, all_host_infos |
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from urllib.request import urlopen, urlretrieve |
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from urllib.error import HTTPError, URLError |
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from urllib.parse import urlencode |
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import logging |
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logger = logging.getLogger('opensubmitexec') |
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def fetch(url, fullpath): |
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''' |
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Fetch data from an URL and save it under the given target name. |
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''' |
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logger.debug("Fetching %s from %s" % (fullpath, url)) |
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tmpfile, headers = urlretrieve(url) |
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if os.path.exists(fullpath): |
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os.remove(fullpath) |
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shutil.move(tmpfile, fullpath) |
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def send_post(config, urlpath, post_data): |
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''' |
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Send POST data to an OpenSubmit server url path, |
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according to the configuration. |
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''' |
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server = config.get("Server", "url") |
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post_data = urlencode(post_data) |
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post_data = post_data.encode("utf-8", errors="ignore") |
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url = server + urlpath |
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try: |
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urlopen(url, post_data) |
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except Exception as e: |
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logger.error('Error while sending data to server: ' + str(e)) |
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def send_hostinfo(config): |
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''' |
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Register this host on OpenSubmit test machine. |
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''' |
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info = all_host_infos() |
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logger.debug("Sending host information: " + str(info)) |
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post_data = [("Config", json.dumps(info)), |
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("Action", "get_config"), |
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("UUID", config.get("Server", "uuid")), |
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("Address", ipaddress()), |
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("Secret", config.get("Server", "secret")) |
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] |
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send_post(config, "/machines/", post_data) |
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def compatible_api_version(server_version): |
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''' |
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Check if this server API version is compatible to us. |
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''' |
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try: |
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semver = server_version.split('.') |
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if semver[0] != '1': |
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logger.error( |
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'Server API version (%s) is too new for us. Please update the executor installation.' % server_version) |
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return False |
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else: |
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return True |
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except Exception: |
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logger.error( |
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'Cannot understand the server API version (%s). Please update the executor installation.' % server_version) |
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return False |
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def fetch_job(config): |
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''' |
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Fetch any available work from the OpenSubmit server and |
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return an according job object. |
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Returns None if no work is available. |
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Errors are reported by this function directly. |
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''' |
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url = "%s/jobs/?Secret=%s&UUID=%s" % (config.get("Server", "url"), |
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config.get("Server", "secret"), |
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config.get("Server", "uuid")) |
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try: |
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# Fetch information from server |
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result = urlopen(url) |
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headers = result.info() |
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if not compatible_api_version(headers["APIVersion"]): |
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# No proper reporting possible, so only logging. |
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logger.error("Incompatible API version. Please update OpenSubmit.") |
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return None |
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if headers["Action"] == "get_config": |
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# The server does not know us, |
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# so it demands registration before hand. |
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logger.info("Machine unknown on server, sending registration ...") |
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send_hostinfo(config) |
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return None |
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# Create job object with information we got |
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from .job import Job |
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job = Job(config) |
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job.submitter_name = headers['SubmitterName'] |
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job.author_names = headers['AuthorNames'] |
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job.submitter_studyprogram = headers['SubmitterStudyProgram'] |
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job.course = headers['Course'] |
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job.assignment = headers['Assignment'] |
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job.action = headers["Action"] |
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job.file_id = headers["SubmissionFileId"] |
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job.sub_id = headers["SubmissionId"] |
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job.file_name = headers["SubmissionOriginalFilename"] |
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job.submitter_student_id = headers["SubmitterStudentId"] |
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if "Timeout" in headers: |
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job.timeout = int(headers["Timeout"]) |
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if "PostRunValidation" in headers: |
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job.validator_url = headers["PostRunValidation"] |
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job.working_dir = create_working_dir(config, job.sub_id) |
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# Store submission in working directory |
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submission_fname = job.working_dir + job.file_name |
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with open(submission_fname, 'wb') as target: |
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target.write(result.read()) |
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assert(os.path.exists(submission_fname)) |
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# Store validator package in working directory |
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validator_fname = job.working_dir + 'download.validator' |
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fetch(job.validator_url, validator_fname) |
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try: |
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prepare_working_directory(job, submission_fname, validator_fname) |
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except JobException as e: |
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job.send_fail_result(e.info_student, e.info_tutor) |
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return None |
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logger.debug("Got job: " + str(job)) |
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return job |
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except HTTPError as e: |
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if e.code == 404: |
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logger.debug("Nothing to do.") |
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return None |
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except URLError as e: |
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logger.error("Error while contacting {0}: {1}".format(url, str(e))) |
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return None |
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def fake_fetch_job(config, src_dir): |
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''' |
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Act like fetch_job, but take the validator file and the student |
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submission files directly from a directory. |
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Intended for testing purposes when developing test scripts. |
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Check also cmdline.py. |
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''' |
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logger.debug("Creating fake job from " + src_dir) |
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from .job import Job |
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job = Job(config, online=False) |
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job.working_dir = create_working_dir(config, '42') |
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for fname in glob.glob(src_dir + os.sep + '*'): |
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logger.debug("Copying {0} to {1} ...".format(fname, job.working_dir)) |
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shutil.copy(fname, job.working_dir) |
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case_files = glob.glob(job.working_dir + os.sep + '*') |
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assert(len(case_files) == 2) |
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if os.path.basename(case_files[0]) in ['validator.py', 'validator.zip']: |
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validator = case_files[0] |
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submission = case_files[1] |
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else: |
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validator = case_files[1] |
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submission = case_files[0] |
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logger.debug('{0} is the validator.'.format(validator)) |
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logger.debug('{0} the submission.'.format(submission)) |
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try: |
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prepare_working_directory(job, |
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submission_path=submission, |
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validator_path=validator) |
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except JobException as e: |
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job.send_fail_result(e.info_student, e.info_tutor) |
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return None |
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logger.debug("Got fake job: " + str(job)) |
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return job |
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troeger /
opensubmit
