diff json_collect_data_source.py @ 32:1edc869cd008 draft

Uploaded 20170607

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/json_collect_data_source.py	Wed Jun 07 18:01:57 2017 -0400
@@ -0,0 +1,282 @@
+#!/usr/bin/env python
+import json
+import optparse
+import urllib
+import os.path
+import os
+from operator import itemgetter
+import tarfile
+
+__version__ = "1.0.0"
+CHUNK_SIZE = 2**20 #1mb
+VALID_CHARS = '.-()[]0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '
+
+
+def splitext(path):
+    for ext in ['.tar.gz', '.tar.bz2']:
+        if path.endswith(ext):
+            path, ext = path[:-len(ext)], path[-len(ext):]
+            break
+    else:
+        path, ext = os.path.splitext(path)
+    return path, ext[1:]
+
+
+def chunk_write( source_stream, target_stream, source_method = "read", target_method="write" ):
+    source_method = getattr( source_stream, source_method )
+    target_method = getattr( target_stream, target_method )
+    while True:
+        chunk = source_method( CHUNK_SIZE )
+        if chunk:
+            target_method( chunk )
+        else:
+            break
+
+
+def deconstruct_multi_filename( multi_filename ):
+    keys = [ 'primary', 'id', 'name', 'visible', 'file_type' ]
+    return ( dict( zip( keys, multi_filename.split('_') ) ) )
+
+
+def construct_multi_filename( id, name, file_type ):
+    """ Implementation of *Number of Output datasets cannot be determined until tool run* from documentation_.
+    .. _documentation: http://wiki.galaxyproject.org/Admin/Tools/Multiple%20Output%20Files
+    """
+    filename = "%s_%s_%s_%s_%s" % ( 'primary', id, name, 'visible', file_type )
+    return filename
+
+
+def download_from_query( query_data, target_output_filename  ):
+    """ Download file from the json data and write it to target_output_filename.
+    """
+    query_url = query_data.get( 'url' )
+    query_file_type = query_data.get( 'extension' )
+    query_stream = urllib.urlopen( query_url )
+    output_stream = open( target_output_filename, 'wb' )
+    chunk_write( query_stream, output_stream )
+    query_stream.close()
+    output_stream.close()
+
+def store_file_from_archive( file_object, target_output_filename, isString=False ):
+    """ Store file after extracting from archive and organize them as a collection using the structure 
+    (collection-name)_(file-name).ext as file name
+    """
+    output_stream = open( target_output_filename, 'wb' )
+    #chunk_write( file_object.read(), output_stream )
+    if not isString:
+        output_stream.write(file_object.read())
+    else:
+        output_stream.write(file_object)
+    output_stream.close()
+
+
+def download_extra_data( query_ext_data, base_path ):
+    """ Download any extra data defined in the JSON.
+    NOTE: the "path" value is a relative path to the file on our
+    file system. This is slightly dangerous and we should make every effort
+    to avoid a malicious absolute path to write the file elsewhere on the
+    filesystem.
+    """
+    for ext_data in query_ext_data:
+        if not os.path.exists( base_path ):
+            os.mkdir( base_path )
+        query_stream = urllib.urlopen( ext_data.get( 'url' ) )
+        ext_path = ext_data.get( 'path' )
+        os.makedirs( os.path.normpath( '/'.join( [ base_path, os.path.dirname( ext_path ) ] ) ) )
+        output_stream = open( os.path.normpath( '/'.join( [ base_path, ext_path ] ) ), 'wb' )
+        chunk_write( query_stream, output_stream )
+        query_stream.close()
+        output_stream.close()
+
+
+def metadata_to_json( dataset_id, metadata, filename, ds_type='dataset', primary=False):
+    """ Return line separated JSON """
+    meta_dict = dict( type = ds_type,
+                      ext = metadata.get( 'extension' ),
+                      filename = filename,
+                      name = metadata.get( 'name' ),
+                      metadata = metadata.get( 'metadata', {} ) )
+    if metadata.get( 'extra_data', None ):
+        meta_dict[ 'extra_files' ] = '_'.join( [ filename, 'files' ] )
+    if primary:
+        meta_dict[ 'base_dataset_id' ] = dataset_id
+    else:
+        meta_dict[ 'dataset_id' ] = dataset_id
+    return "%s\n" % json.dumps( meta_dict )
+
+
+def walk_on_archive(target_output_filename, check_ext, archive_name, appdata_path, db_key="?"):
+    archive_name = archive_name.replace("_", "-").replace(".", "-")
+    with tarfile.open( target_output_filename, check_ext ) as tf:
+        for entry in tf:
+            if entry.isfile():
+                fileobj = tf.extractfile( entry )
+                # reserve the underscore for the collection searator
+                filename = os.path.basename( entry.name ).replace("_", "-")
+                extension = splitext( filename )[1]
+                # pattern: (?P<identifier_0>[^_]+)_(?P<identifier_1>[^_]+)_(?P<ext>[^_]+)_(?P<dbkey>[^_]+)
+                if (len(extension) > 0):
+                    filename = (filename[0:len(filename)-(len(extension)+1)]).replace(".", "-") + "." + extension + "_" + extension
+                else:
+                    extension = "auto"
+                filename_with_collection_prefix = archive_name + "_" + filename + "_" + db_key
+                target_entry_output_filename = os.path.join(appdata_path, filename_with_collection_prefix)
+                store_file_from_archive( fileobj, target_entry_output_filename )
+    return True
+
+
+def download_files_and_write_metadata(query_item, json_params, output_base_path, metadata_parameter_file, primary, appdata_path, options, args):
+    """ Main work function that operates on the JSON representation of
+    one dataset and its metadata. Returns True.
+    """
+    dataset_url, output_filename, \
+        extra_files_path, file_name, \
+        ext, out_data_name, \
+        hda_id, dataset_id = set_up_config_values(json_params)
+    extension = query_item.get( 'extension' )
+    url = query_item.get( 'url' )
+    filename = query_item.get( 'name' )
+
+    check_ext = ""
+    if ( url.endswith( "gz" ) ):
+        check_ext = "r:gz"
+    elif ( url.endswith( "bz2" ) ):
+        check_ext = "r:bz2"
+    elif ( url.endswith( "tar" ) ):
+        check_ext = "r:"
+    isArchive = bool( check_ext and check_ext.strip() )
+
+    extra_data = query_item.get( 'extra_data', None )
+    if primary:
+        filename = ''.join( c in VALID_CHARS and c or '-' for c in filename )
+        name = construct_multi_filename( hda_id, filename, extension )
+        target_output_filename = os.path.normpath( '/'.join( [ output_base_path, name ] ) )
+        if isArchive is False:
+            metadata_parameter_file.write( metadata_to_json( dataset_id, query_item,
+                                                             target_output_filename,
+                                                             ds_type='new_primary_dataset',
+                                                             primary=primary) )
+    else:
+        target_output_filename = output_filename
+        if isArchive is False:
+            metadata_parameter_file.write( metadata_to_json( dataset_id, query_item,
+                                                             target_output_filename,
+                                                             ds_type='dataset',
+                                                             primary=primary) )
+    
+    if isArchive is False:
+        download_from_query( query_item, target_output_filename )
+    else:
+        target_output_path = os.path.join(appdata_path, filename)
+        download_from_query( query_item, target_output_path )
+    if extra_data:
+        extra_files_path = ''.join( [ target_output_filename, 'files' ] )
+        download_extra_data( extra_data, extra_files_path )
+
+    """ the following code handles archives and decompress them in a collection """
+    if ( isArchive ):
+        db_key = "?"
+        archive_metadata = query_item.get( 'metadata', None )
+        if archive_metadata is not None:
+            try:
+                db_key = archive_metadata.get( 'db_key' )
+            except:
+                pass
+        walk_on_archive(target_output_path, check_ext, filename, appdata_path, db_key)
+
+    return True
+
+
+def set_up_config_values(json_params):
+    """ Parse json_params file and return a tuple of necessary configuration
+    values.
+    """
+    datasource_params = json_params.get( 'param_dict' )
+    dataset_url = datasource_params.get( 'URL' )
+    output_filename = datasource_params.get( 'output1', None )
+    output_data = json_params.get( 'output_data' )
+    extra_files_path, file_name, ext, out_data_name, hda_id, dataset_id = \
+      itemgetter('extra_files_path', 'file_name', 'ext', 'out_data_name', 'hda_id', 'dataset_id')(output_data[0])
+    return (dataset_url, output_filename,
+            extra_files_path, file_name,
+            ext, out_data_name,
+            hda_id, dataset_id)
+
+
+def download_from_json_data( options, args ):
+    """ Parse the returned JSON data and download files. Write metadata
+    to flat JSON file.
+    """
+    output_base_path = options.path
+    appdata_path = options.appdata
+    if not os.path.exists(appdata_path):
+        os.makedirs(appdata_path)
+
+    # read tool job configuration file and parse parameters we need
+    json_params = json.loads( open( options.json_param_file, 'r' ).read() )
+    print("json_params: "+str(json_params))
+    
+    dataset_url, output_filename, \
+        extra_files_path, file_name, \
+        ext, out_data_name, \
+        hda_id, dataset_id = set_up_config_values(json_params)
+    # line separated JSON file to contain all dataset metadata
+    metadata_parameter_file = open( json_params['job_config']['TOOL_PROVIDED_JOB_METADATA_FILE'], 'wb' )
+
+    # get JSON response from data source
+    # TODO: make sure response is not enormous
+    query_params = json.loads(urllib.urlopen( dataset_url ).read())
+    # download and write files
+    primary = False
+    #primary = True
+    # query_item, hda_id, output_base_path, dataset_id
+    for query_item in query_params:
+        if isinstance( query_item, list ):
+            # TODO: do something with the nested list as a collection
+            for query_subitem in query_item:
+                primary = download_files_and_write_metadata(query_subitem, json_params, output_base_path,
+                                                            metadata_parameter_file, primary, appdata_path, options, args)
+
+        elif isinstance( query_item, dict ):
+            primary = download_files_and_write_metadata(query_item, json_params, output_base_path,
+                                                        metadata_parameter_file, primary, appdata_path, options, args)
+    metadata_parameter_file.close()
+
+def __main__():
+    """ Read the JSON return from a data source. Parse each line and request
+    the data, download to "newfilepath", and write metadata.
+
+    Schema
+    ------
+
+        [ {"url":"http://url_of_file",
+           "name":"encode WigData",
+           "extension":"wig",
+           "metadata":{"db_key":"hg19"},
+           "extra_data":[ {"url":"http://url_of_ext_file",
+                           "path":"rel/path/to/ext_file"}
+                        ]
+          }
+        ]
+
+    """
+    # Parse the command line options
+    usage = "Usage: json_data_source_mod.py max_size --json_param_file filename [options]"
+    parser = optparse.OptionParser(usage = usage)
+    parser.add_option("-j", "--json_param_file", type="string",
+                    action="store", dest="json_param_file", help="json schema return data")
+    parser.add_option("-p", "--path", type="string",
+                    action="store", dest="path", help="new file path")
+    parser.add_option("-a", "--appdata", type="string",
+                    action="store", dest="appdata", help="appdata folder name")
+    parser.add_option("-v", "--version", action="store_true", dest="version",
+                    default=False, help="display version and exit")
+
+    (options, args) = parser.parse_args()
+    if options.version:
+        print __version__
+    else:
+        download_from_json_data( options, args )
+
+
+if __name__ == "__main__": __main__()