def get(self, arkid, premisid):
"""
Get the whole record
"""
from flask import current_app
whitelist_opened = open(current_app.config["WHITELIST"], "r")
check = False
for line in whiteliste_opened:
if line.strip() == join(arkid, premisid):
check = True
break
if not check:
return abort(404, message="could not find the {}".format(join(arkid, presform.objid)))
try:
user = "******" if "private" in request.environ.get("REQUEST_URI") else "anonymous"
event_category = "anonymous download" if user == "anonymous" else "authorized download"
data = get_object_halves(arkid, premisid, current_app.config["LONGTERMSTORAGE_PATH"], current_app.config["LIVEPREMIS_PATH"])
if not data:
return abort(404, message="{} cannot be found".format(join(arkid, premisid)))
else:
attach_filename, mimetype = get_an_attachment_filename(data[1])
record_path = join(current_app.config["LIVEPREMIS_PATH"],
str(identifier_to_path(arkid)), "arf", "pairtree_root",
str(identifier_to_path(premisid)), "arf", "premis.xml")
make_download_event(record_path, event_category,
datetime.now().isoformat(), "SUCCESS",
user, data[1].objid)
resp = send_file(data[1].content_loc,
as_attachment=True,
attachment_filename=attach_filename,
mimetype=mimetype)
return resp
except Exception as e:
return jsonify(_EXCEPTION_HANDLER.handle(e).dictify())
def get_data_half_of_object(arkid, premisid, lp_path):
arkid_path = str(identifier_to_path(arkid))
premisid_path = str(identifier_to_path(premisid))
path_to_premis = join(lp_path, arkid_path,"arf", "pairtree_root", premisid_path, "arf", "premis.xml")
if exists(path_to_premis):
return (path_to_premis, extract_identity_data_from_premis_record(path_to_premis))
else:
return None
def get_content_half_of_object(arkid, premisid, lts_path):
arkid_path = str(identifier_to_path(arkid))
premisid_path = str(identifier_to_path(premisid))
path_to_content = join(lts_path, arkid_path, "arf", "pairtree_root",
premisid_path, "arf", "content.file")
if exists(path_to_content):
return (path_to_content, None)
else:
return None
def get(self, arkid, premisid, numbered_request):
"""a method to to retrieve one particular presform related to the identified object
__Args__
1. arkid (str): an accession identifier
2. premisid (str): an object identifier
3. numbered_request (int): a numbered related object that is desired
"""
from flask import current_app
try:
user = "******" if "private" in request.environ.get(
"REQUEST_URI") else "anonymous"
event_category = "anonymous download" if user == "anonymous" else "authorized download"
data = get_object_halves(arkid, premisid,
current_app.config["LIVEPREMIS_PATH"])
related_objects = data[1].related_objects
output = {}
tally = 1
for n_object in related_objects:
output[str(tally)] = {"loc": join("/", arkid, n_object)}
choice = output.get(numbered_request)
if choice:
presform = get_object_halves(
arkid,
choice.get("loc").split("/")[2],
current_app.config["LONGTERMSTORAGE_PATH"])
if presform:
record_path = join(
current_app.config["LIVEPREMIS_PATH"],
str(identifier_to_path(arkid)), "arf", "pairtree_root",
str(identifier_to_path(presform[1].objid)), "arf",
"premis.xml")
make_download_event(record_path, event_category,
datetime.now().isoformat(), "SUCCESS",
user, presform[1].objid)
attach_filename, mimetype = get_an_attachment_filename(
data)
resp = send_file(content_item,
as_attachment=True,
attachment_filename=attach_filename,
mimetype=mimetype)
return jsonify(resp.dictify())
else:
return abort(404,
message="could not find the {}".format(
join(arkid, presform.objid)))
else:
return abort(404,
message="could not find {}".format(
join(arkid, premisid)))
except Exception as e:
return jsonify(_EXCEPTION_HANDLER.handle(e).dictify())
def get_object(self, id):
content_path = Path(
self.lts_root, identifier_to_path(id), "arf", "content.file"
)
if not content_path.is_file():
raise ObjectNotFoundError(str(id))
return open(str(content_path))
def del_object(self, id):
content_path = Path(
self.lts_root, identifier_to_path(id), "arf", "content.file"
)
if not content_path.exists():
return True
remove(str(content_path))
return True
def set_object(self, id, content):
content_path = Path(
self.lts_root, identifier_to_path(id), "arf", "content.file"
)
if self.check_object_exists(id):
raise ObjectAlreadyExistsError(str(id))
makedirs(str(content_path.parent), exist_ok=True)
content.save(str(content_path))
def edit_a_premis_agent(dto):
identifier = dto.identifier
pairtree_identifier = str(identifier_to_path(identifier))
path_to_agent_record = create_agent_path(dto, identifier)
record_to_edit = PremisRecord(frompath=path_to_agent_record)
agents_list = record_to_edit.get_agent_list()
agent_node = agents_list[0]
for n_field in dto.edit_fields:
if n_field == "name":
agent_node.set_agentName(getattr(dto, n_field))
elif n_field == "type":
agent_node.set_agentType(getattr(dto, n_field))
agent_list = [agent_node]
record_to_edit = PremisRecord(agents=agent_list)
try:
write_a_premis_record(record_to_edit, path_to_agent_record)
return (True, identifier)
except IOError:
return (False, None)
def add_event_to_a_premis_agent(dto):
"""a function to add a PREMIS event to a particular premis record
__Args__
1. premis_record (PremisRecord) an instance of pyremis.lib.PremisRecord
2. an_event (Event): an instance of pypremis.nodes.Event
"""
path_to_agent_record = join(dto.root,
str(identifier_to_path(dto.identifier)), "prf",
"agent.xml")
record_to_edit = PremisRecord(frompath=path_to_agent_record)
agents = record_to_edit.get_agent_list()
agent = agents[0]
stderr.write(dto.event)
new_linked_event = LinkingEventIdentifier("DOI", dto.event)
stderr.write(str(new_linked_event))
agent.add_linkingEventIdentifier(new_linked_event)
records_to_edit = PremisRecord(agents=[agent])
write_a_premis_record(record_to_edit, path_to_agent_record)
return True
def __init__(self, arkid, objid, whitelist=True):
"""the initialization method for the AnInstanceItem class
__Args__
1. arkid (str): a string nice opaque universal identifier for a particular accession that
contains premis record objects
2. objid (str): a string unique universal identifier for a particular premis record object
__KWARgs__
1. whitelist (Boolean): a flag for whether or not to determine of the content is authorized to be distributed publicly
"""
self.arkid = arkid
self.objid = objid
self.whitelist = "/disk/0/repositoryCode/apistorage/publicurls/whitelist.txt"
self.content_root = "/data/repository/longTermStorage"
self.premis_root = "/data/repository/livePremis"
self.premisid_path = identifier_to_path(objid)
self.arkid_path = identifier_to_path(arkid)
self.premis_file_path = join(self.premis_root,
str(identifier_to_path(arkid)),
"arf", "pairtree_root",
str(identifier_to_path(objid)),
"arf", "premis.xml")
self.content_file_path = join(self.content_root,
str(identifier_to_path(arkid)),
"arf", "pairtree_root",
str(identifier_to_path(objid)),
"arf", "content.file")
self.premis_core_data = extract_identity_data_from_premis_record(self.premis_file_path)
self.mimetype = self.premis_core_data.mimetype
self.extension = self.mimetype.split('/')[1]
if whitelist:
if self.get_identifier() in open(self.whitelist, "r").readlines():
self.public = True
else:
self.public = False
def create_agent_path(dto, identifier):
path = join(dto.root, str(identifier_to_path(identifier)), "prf",
"agent.xml")
return path
def check_object_exists(self, id):
content_path = Path(
self.lts_root, identifier_to_path(id), "arf", "content.file"
)
return content_path.is_file()
def get(self, arkid, premisid):
"""a method to get the last related object if there is one or the content file
__Args__
1. arkid (str): an accession identifier
2. premisid (str): an object identifier
"""
from flask import current_app
try:
user = request.headers.get("uid") if request.headers.get(
"uid") else "anonymous"
event_category = "anononymous download" if user == "anonymous" else "restricted download"
data = get_object_halves(
arkid, premisid, current_app.config["LONGTERMSTORAGE_PATH"],
current_app.config["LIVEPREMIS_PATH"])
related_objects = data[1].related_objects
if len(related_objects) > 0:
output = {}
tally = 1
for n_object in related_objects:
output[str(tally)] = {"loc": join("/", arkid, n_object)}
last_related_object = list(output.keys())[-1]
choice = output.get(last_related_object)
if choice:
presform = get_object_halves(
arkid,
choice.get("loc").split("/")[2],
current_app.config["LONGTERMSTORAGE_PATH"])
if presform:
record_path = join(
current_app.config["LIVEPREMIS_PATH"],
str(identifier_to_path(arkid)), "arf",
"pairtree_root",
str(identifier_to_path(presform[1].objid)), "arf",
"premis.xml")
make_download_event(record_path, event_category,
datetime.now().isoformat(),
"SUCCESS", user, presform[1].objid)
attach_filename, mimetype = get_an_attachment_filename(
presform[1])
resp = send_file(presform[1].content_loc,
as_attachment=True,
attachment_filename=attach_filename,
mimetype=mimetype)
return resp
else:
return abort(404,
message="could not find the {}".format(
join(arkid, presform.objid)))
else:
return abort(404,
message="could not find {}".format(
join(arkid, premisid)))
else:
record_path = join(current_app.config["LIVEPREMIS_PATH"],
str(identifier_to_path(arkid)), "arf",
"pairtree_root",
str(identifier_to_path(premisid)), "arf",
"premis.xml")
make_download_event(record_path, event_category,
datetime.now().isoformat(), "SUCCESS",
user, data[1].objid)
attach_filename, mimetype = get_an_attachment_filename(data[1])
resp = send_file(data[1].content_loc,
as_attachment=True,
attachment_filename=attach_filename,
mimetype=mimetype)
return resp
except Exception as e:
return jsonify(_EXCEPTION_HANDLER.handle(e).dictify())
