Source code for

This module provides a wrapper around the VSO API.

import os
import cgi
import copy
import json
import socket
import inspect
import datetime
import warnings
import itertools
from pathlib import Path
from functools import partial
from urllib.error import URLError, HTTPError
from urllib.parse import urlencode
from urllib.request import Request, urlopen

import zeep

from sunpy import config, log
from import and_
from import BaseClient, QueryResponseRow
from import attrs
from import _walker as walker
from sunpy.util.decorators import deprecated
from sunpy.util.exceptions import SunpyDeprecationWarning, SunpyUserWarning
from import slugify
from sunpy.util.parfive_helpers import Downloader, Results
from .. import _attrs as core_attrs
from .exceptions import (
from .legacy_response import QueryResponse
from .table_response import VSOQueryResponseTable
from .zeep_plugins import SunPyLoggingZeepPlugin

DEFAULT_URL_PORT = [{'url': '',
                     'port': 'nsoVSOi'},
                    {'url': '',
                     'port': 'sdacVSOi'}]

class _Str(str):
    """ Subclass of string that contains a meta attribute for the
    record_item associated with the file. """
    meta = None

# ----------------------------------------
def check_connection(url):
        return urlopen(url).getcode() == 200
    except (socket.error, socket.timeout, HTTPError, URLError) as e:
        warnings.warn(f"Connection to {url} failed with error {e}. Retrying with different url and port.",
        return None

def get_online_vso_url():
    Return the first VSO url and port combination that is online.
    for mirror in DEFAULT_URL_PORT:
        if check_connection(mirror['url']):
            return mirror

def build_client(url=None, port_name=None, **kwargs):
    Construct a `zeep.Client` object to connect to VSO.

    url : `str`
        The URL to connect to.

    port_name : `str`
        The "port" to use.

    kwargs : `dict`
        All extra keyword arguments are passed to `zeep.Client`.


    if url is None and port_name is None:
        mirror = get_online_vso_url()
        if mirror is None:
            raise ConnectionError("No online VSO mirrors could be found.")
        url = mirror['url']
        port_name = mirror['port']
    elif url and port_name:
        if not check_connection(url):
            raise ConnectionError(f"Can't connect to url {url}")
        raise ValueError("Both url and port_name must be specified if either is.")

    if "plugins" not in kwargs:
        kwargs["plugins"] = [SunPyLoggingZeepPlugin()]

    client = zeep.Client(url, port_name=port_name, **kwargs)
    client.set_ns_prefix('VSO', '')
    return client

[docs]class VSOClient(BaseClient): """ Provides access to query and download from Virtual Solar Observatory (VSO). Parameters ---------- url : `str`, optional The VSO url to use. If not specified will use the first online known URL. port : `str`, optional The VSO port name to use. If not specified will use the first online known URL. api : `zeep.Client`, optional The `zeep.Client` instance to use for interacting with the VSO. If not specified one will be created. """ method_order = [ 'URL-FILE_Rice', 'URL-FILE', 'URL-packaged', 'URL-TAR_GZ', 'URL-ZIP', 'URL-TAR', ] def __init__(self, url=None, port=None, api=None): if not isinstance(api, zeep.Client): api = build_client(url, port) if api is None: raise ConnectionError("Cannot find an online VSO mirror.") self.api = api def __deepcopy__(self, memo): """ Copy the client but don't copy the API object. """ memo[id(self.api)] = self.api deepcopy_method = self.__deepcopy__ self.__deepcopy__ = None cp = copy.deepcopy(self, memo) self.__deepcopy__ = deepcopy_method cp.__deepcopy__ = deepcopy_method return cp
[docs] def make(self, atype, **kwargs): """ Create a new SOAP object. """ obj = self.api.get_type(f"VSO:{atype}") return obj(**kwargs)
[docs] def search(self, *query, response_format=None): """ Query data from the VSO with the new API. Takes a variable number of attributes as parameter, which are chained together using AND. Parameters ---------- response_format: {"legacy", "table"} The response format from the search, this can be either ``"legacy"`` to return a list-like object of the zeep responses, or ``"table"`` to return the responses in a subclass of `~astropy.table.QTable`. Examples -------- Query all data from eit or aia between 2010-01-01T00:00 and 2010-01-01T01:00. >>> from datetime import datetime >>> from import vso, attrs as a >>> client = vso.VSOClient() # doctest: +REMOTE_DATA >>> ... a.Time(datetime(2010, 1, 1), datetime(2010, 1, 1, 1)), ... a.Instrument.eit | a.Instrument.aia, ... response_format="table") # doctest: +REMOTE_DATA < object at ...> Start Time End Time Source ... Extent Type Size ... Mibyte ----------------------- ----------------------- ------ ... ----------- ------- 2010-01-01 00:00:08.000 2010-01-01 00:00:20.000 SOHO ... FULLDISK 2.01074 2010-01-01 00:12:08.000 2010-01-01 00:12:20.000 SOHO ... FULLDISK 2.01074 2010-01-01 00:24:10.000 2010-01-01 00:24:22.000 SOHO ... FULLDISK 2.01074 2010-01-01 00:36:08.000 2010-01-01 00:36:20.000 SOHO ... FULLDISK 2.01074 2010-01-01 00:48:09.000 2010-01-01 00:48:21.000 SOHO ... FULLDISK 2.01074 Returns ------- out : `QueryResult` Matched items. Return value is of same type as the one of :meth:``. """ if response_format is None: response_format = "legacy" warnings.warn("The default response format from the VSO client will " "be changing to 'table' in version 3.1. " "To remove this warning set response_format='legacy' " "to maintain the old behaviour or response_format='table'" " to use the new behaviour.", SunpyDeprecationWarning, stacklevel=2) query = and_(*query) QueryRequest = self.api.get_type('VSO:QueryRequest') VSOQueryResponse = self.api.get_type('VSO:QueryResponse') responses = [] exceptions = [] for block in walker.create(query, self.api): try: query_response = self.api.service.Query( QueryRequest(block=block) ) for resp in query_response: if resp["error"]: warnings.warn(resp["error"], SunpyUserWarning) responses.append( VSOQueryResponse(query_response) ) except Exception as ex: exceptions.append(ex) responses = self.merge(responses) if response_format == "legacy": response = QueryResponse.create(responses) else: response = VSOQueryResponseTable.from_zeep_response(responses, client=self) for ex in exceptions: response.add_error(ex) return response
[docs] def merge(self, queryresponses): """ Merge responses into one. """ if len(queryresponses) == 1: return queryresponses[0] fileids = set() providers = {} for queryresponse in queryresponses: for provideritem in queryresponse.provideritem: provider = provideritem.provider if not hasattr(provideritem, 'record'): continue if not hasattr(provideritem.record, 'recorditem'): continue if provideritem.provider not in providers: providers[provider] = provideritem fileids |= { record_item.fileid for record_item in provideritem.record.recorditem } else: for record_item in provideritem.record.recorditem: if record_item.fileid not in fileids: fileids.add(record_item.fileid) providers[provider].record.recorditem.append( record_item ) providers[provider].no_of_records_found += 1 providers[provider].no_of_records_returned += 1 return self.make('QueryResponse', provideritem=list(providers.values()))
[docs] @staticmethod def mk_filename(pattern, queryresponserow, resp, url): """ Generate the best possible (or least-worse) filename for a VSO download. * Use the ``content-disposition`` header. * Use ``fileid`` to generate a file name if content-disposition fails * If everything else fails use the last segment of the URL and hope. """ name = None if resp: cdheader = resp.headers.get("Content-Disposition", None) if cdheader: _, params = cgi.parse_header(cdheader) name = params.get('filename', "") # Work around if name.count('"') >= 2: name = name.split('"')[1] if name is None: # Advice from the VSO is to fallback to providerid + fileid for a filename # As it's possible multiple providers give the same fileid. # However, I haven't implemented this yet as it would be a breaking # change to the filenames we expect. fileid = queryresponserow['fileid'] # Some providers make fileid a path # Some also don't specify a file extension, but not a lot we can do # about that. name = fileid.split("/")[-1] # If somehow we have got this far with an empty string, fallback to url segment if not name: name = url.split('/')[-1] # Remove any not-filename appropriate characters name = slugify(name) # If absolutely everything else fails make a filename based on download time if not name: name = f"vso_file_{'%Y%m%d%H%M%S%f')}" fname = pattern.format(file=name, **queryresponserow.response_block_map) return fname
[docs] def fetch(self, query_response, path=None, methods=None, site=None, progress=True, overwrite=False, downloader=None, wait=True): """ Download data specified in the query_response. Parameters ---------- query_response : QueryResponse containing the items to be downloaded. path : str Specify where the data is to be downloaded. Can refer to arbitrary fields of the QueryResponseItem (instrument, source, time, ...) via string formatting, moreover the file-name of the file downloaded can be referred to as file, e.g. "{source}/{instrument}/{time.start}/{file}". methods : {list of str} Download methods, defaults to URL-FILE_Rice then URL-FILE. Methods are a concatenation of one PREFIX followed by any number of SUFFIXES i.e. ``PREFIX-SUFFIX_SUFFIX2_SUFFIX3``. The full list of `PREFIXES <>`_ and `SUFFIXES <>`_ are listed on the VSO site. site : str There are a number of caching mirrors for SDO and other instruments, some available ones are listed below. =============== ======================================================== NSO National Solar Observatory, Tucson (US) SAO (aka CFA) Smithonian Astronomical Observatory, Harvard U. (US) SDAC (aka GSFC) Solar Data Analysis Center, NASA/GSFC (US) ROB Royal Observatory of Belgium (Belgium) MPS Max Planck Institute for Solar System Research (Germany) UCLan University of Central Lancashire (UK) IAS Institut Aeronautique et Spatial (France) KIS Kiepenheuer-Institut fur Sonnenphysik Germany) NMSU New Mexico State University (US) =============== ======================================================== progress : `bool`, optional If `True` show a progress bar showing how many of the total files have been downloaded. If `False`, no progress bars will be shown at all. overwrite : `bool` or `str`, optional Determine how to handle downloading if a file already exists with the same name. If `False` the file download will be skipped and the path returned to the existing file, if `True` the file will be downloaded and the existing file will be overwritten, if ``'unique'`` the filename will be modified to be unique. downloader : `parfive.Downloader`, optional The download manager to use. wait : `bool`, optional If `False` ```` will not be called. Only has any effect if ``downloader`` is not `None`. Returns ------- out : `parfive.Results` Object that supplies a list of filenames and any errors. Examples -------- >>> files = fetch(qr) # doctest:+SKIP """ if path is None: path = Path(config.get('downloads', 'download_dir')) / '{file}' elif isinstance(path, (str, os.PathLike)) and '{file}' not in str(path): path = Path(path) / '{file}' else: path = Path(path) path = path.expanduser() dl_set = True if not downloader: dl_set = False downloader = Downloader(progress=progress, overwrite=overwrite) if isinstance(query_response, (QueryResponse, list)): query_response = VSOQueryResponseTable.from_zeep_response(query_response, client=self, _sort=False) if isinstance(query_response, QueryResponseRow): query_response = query_response.as_table() if not len(query_response): return if wait else Results() # Adding the site parameter to the info info = {} if site is not None: info['site'] = site VSOGetDataResponse = self.api.get_type("VSO:VSOGetDataResponse") data_request = self.make_getdatarequest(query_response, methods, info) data_response = VSOGetDataResponse(self.api.service.GetData(data_request)) err_results = self.download_all(data_response, methods, downloader, str(path), self.by_fileid(query_response)) if dl_set and not wait: return err_results results = results += err_results results._errors += err_results.errors return results
[docs] def make_getdatarequest(self, response, methods=None, info=None): """ Make datarequest with methods from response. """ if methods is None: methods = self.method_order + ['URL'] return self.create_getdatarequest( {g[0]['Provider']: list(g['fileid']) for g in response.group_by('Provider').groups}, methods, info )
[docs] def create_getdatarequest(self, maps, methods, info=None): """ Create datarequest from maps mapping data provider to fileids and methods, """ if info is None: info = {} if 'email' not in info: info['email'] = 'sunpy' # For the JSOC provider we need to make a DataRequestItem for each # series, not just one for the whole provider. # Remove JSOC provider items from the map jsoc = maps.pop('JSOC', []) # Make DRIs for everything that's not JSOC one per provider dris = [self.make('DataRequestItem', provider=k, fileiditem={'fileid': v}) for k, v in maps.items()] def series_func(x): """ Extract the series from the fileid. """ return x.split(':')[0] # Sort the JSOC fileids by series # This is a precursor to groupby as recommended by the groupby docs series_sorted = sorted(jsoc, key=series_func) # Iterate over the series and make a DRI for each. # groupby creates an iterator based on a key function, in this case # based on the series (the part before the first ':') for series, fileids in itertools.groupby(series_sorted, key=series_func): dris.append(self.make('DataRequestItem', provider='JSOC', fileiditem={'fileid': list(fileids)})) request = {'method': {'methodtype': methods}, 'info': info, 'datacontainer': {'datarequestitem': dris} } return self.make('VSOGetDataRequest', request=request)
[docs] def download_all(self, response, methods, downloader, path, qr, info=None): results = Results() GET_VERSION = [ ('0.8', (5, 8)), ('0.7', (1, 4)), ('0.6', (0, 3)), ] for dresponse in response.getdataresponseitem: for version, (from_, to) in GET_VERSION: if getattr(dresponse, version, '0.6') >= version: break else: results.add_error('', UnknownVersion(dresponse)) continue # If from_ and to are uninitialized, the else block of the loop # continues the outer loop and thus this code is never reached. code = ( dresponse.status[from_:to] if getattr(dresponse, 'status', None) else '200' ) if code == '200': for dataitem in dresponse.getdataitem.dataitem: try: dresponse.method.methodtype[0], dataitem.url, downloader, path, qr[dataitem.fileiditem.fileid[0]] ) except NoData: results.add_error('', '', DownloadFailed(dresponse)) continue elif code == '300' or code == '412' or code == '405': if code == '300': try: methods = self.multiple_choices( dresponse.method.methodtype, dresponse ) except NoData: results.add_error('', '', MultipleChoices(dresponse)) continue elif code == '412': try: info = self.missing_information( info, ) except NoData: results.add_error('', '', MissingInformation(dresponse)) continue elif code == '405': try: methods = self.unknown_method(dresponse) except NoData: results.add_error('', '', UnknownMethod(dresponse)) continue files = [] for dataitem in dresponse.getdataitem.dataitem: files.extend(dataitem.fileiditem.fileid) request = self.create_getdatarequest( {dresponse.provider: files}, methods, info ) self.download_all( self.api.service.GetData(request), methods, downloader, path, qr, info ) else: results.add_error('', '', UnknownStatus(dresponse)) return results
[docs] def download(self, method, url, downloader, *args): """ Enqueue a file to be downloaded, extra args are passed to ``mk_filename``""" if method.startswith('URL'): return downloader.enqueue_file(url, filename=partial(self.mk_filename, *args)) raise NoData
[docs] @staticmethod def by_fileid(response): """ Returns a dictionary of fileids corresponding to records in the response. """ return { record['fileid']: record for record in response }
[docs] def multiple_choices(self, choices, response): """ Override to pick between multiple download choices. """ for elem in self.method_order: if elem in choices: return [elem] raise NoData
[docs] def missing_information(self, info, field): """ Override to provide missing information. """ raise NoData
[docs] def unknown_method(self, response): """ Override to pick a new method if the current one is unknown. """ raise NoData
@classmethod def _can_handle_query(cls, *query): required = {core_attrs.Time} # Get all classes in core_attrs and attrs optional = {value for (name, value) in inspect.getmembers(core_attrs) if name in core_attrs.__all__} optional.update(value for (name, value) in inspect.getmembers(attrs) if name in attrs.__all__) return cls.check_attr_types_in_query(query, required, optional) @classmethod def _attrs_module(cls): return 'vso', '' def __del__(self): """ Attempt to close the connection, but if it fails, continue. """ try: self.api.transport.session.close() except Exception as e: log.debug(f"Failed to close VSO API connection with: {e}")
[docs] @classmethod def register_values(cls): # We always use the local file for now. return cls.load_vso_values()
[docs] @staticmethod def load_vso_values(): """ We take this list and register all the keywords as corresponding Attrs. Returns ------- dict The constructed Attrs dictionary ready to be passed into Attr registry. """ from import attrs as a here = os.path.dirname(os.path.realpath(__file__)) with open(os.path.join(here, 'data', 'attrs.json'), 'r') as attrs_file: keyword_info = json.load(attrs_file) # Now to traverse the saved dict and give them attr keys. attrs = {} for key, value in keyword_info.items(): attr = getattr(a, key.capitalize(), None) if attr is None: attr = getattr(a.vso, key.capitalize()) attrs[attr] = value return attrs
[docs] @staticmethod def create_parse_vso_values(): """ Makes a network call to the VSO API that returns what keywords they support. We take this list and register all the keywords as corresponding Attrs. """ here = os.path.dirname(os.path.realpath(__file__)) # Keywords we are after keywords = ["+detector", "+instrument", "+source", "+provider", "+physobs", "+level"] # Construct and format the request keyword_info = {} url = "" headers = {"Content-Type": "application/x-www-form-urlencoded"} for keyword in keywords: data = urlencode({'fields': f"['{keyword}']".replace("'", '"')}).encode('ascii') req = Request(url=url, data=data, headers=headers) response = urlopen(req) keyword_info[keyword.replace("+", "")] = json.loads( # Now to traverse the return and create attrs out of them. attrs = {} for key, value in keyword_info.items(): attrs[key] = [] for item in value: if item: if key == "level": attrs[key].append((str(item[key]), str(item[key]))) else: attrs[key].append((str(item[key]), str(item[key+"_long"]))) with open(os.path.join(here, 'data', 'attrs.json'), 'w') as attrs_file: json.dump(attrs, attrs_file, indent=2)