Exemple : Préparer des fonds de carte Esri à utiliser dans des workflows hors connexion

La configuration préalable de Portal for ArcGIS inclut un ensemble de fonds de carte provenant d'ArcGIS Online. Ces fonds de carte ne peuvent pas être utilisés dans des workflows hors connexion. Par exemple, vous ne pouvez pas utiliser ces fonds de carte préconfigurés hors connexion dans Collector for ArcGIS.

Le script python suivant utilise des fonds de carte ArcGIS Online par défaut et les ajoute à votre portail sous la forme d'éléments de carte. Les éléments de carte des fonds de carte peuvent être déconnectés et utilisés dans des workflows hors connexion. Pour exécuter le script, vous devez fournir vos informations d'identification de compte ArcGIS Online.

Vous devez spécifier les informations suivantes lorsque vous exécutez le script :

URL permettant d'accéder à Portal for ArcGIS. Il peut s'agir de l'URL d'ArcGIS Web Adaptor, par exemple https://webadaptor.domain.com/arcgis ou de l'URL de l'ordinateur qui héberge le portail, par exemple https://portal.domain.com:7443/arcgis. Vous devez inclure le nom de domaine complet de l'ordinateur lorsque vous spécifiez l'URL.
Nom d'utilisateur et mot de passe d'un compte de votre portail.
Nom d'un dossier dans lequel seront créés de nouveaux éléments de carte. Si ce nom n'est pas fourni, les éléments sont créés dans votre dossier racine.
Nom d'utilisateur et mot de passe d'un compte ArcGIS Online. Ce script va incorporer vos informations d'identification ArcGIS Online dans les nouveaux éléments de carte pour activer les fonctions hors connexion des fonds de carte.

L'exemple suivant permet de créer un ensemble de fonds de carte dans votre dossier racine. Les fonds de carte comprennent vos informations d'identification ArcGIS Online pour que des applications telles que Collector for ArcGIS puissent les utiliser dans des workflows hors connexion.

python prepareEsriBasemapsForOfflineUse.py https://webadaptor.domain.com/arcgis portalUser portalPassword arcGISOnlineUser arcGISOnlinePassword

#!/usr/bin/env python
# Requires Python 2.7+

# Sample Usage:
# python addOfflineBasemaps.py -u <destinationPortal> -o <portalAdmin>
#                              -s <portalPassword> -f <destFolder>
#                              -a <agoUsername> -p <agoPassword>

import urllib
import json
import argparse

def generateToken(username, password, portalUrl):
    '''Retrieves a token to be used with API requests.'''
    parameters = urllib.urlencode({'username' : username,
                                   'password' : password,
                                   'client' : 'referer',
                                   'referer': portalUrl,
                                   'expiration': 60,
                                   'f' : 'json'})
    response = urllib.urlopen(portalUrl + '/sharing/rest/generateToken?',
                              parameters).read()
    try:
        jsonResponse = json.loads(response)
        if 'token' in jsonResponse:
            return jsonResponse['token']
        elif 'error' in jsonResponse:
            print jsonResponse['error']['message']
            for detail in jsonResponse['error']['details']:
                print detail
    except ValueError, e:
        print 'An unspecified error occurred.'
        print e

def searchPortal(portal, query=None, totalResults=None, sortField='numviews',
                 sortOrder='desc', token=''):
    '''
    Search the portal using the specified query and search parameters.
    Optionally provide a token to return results visible to that user.
    '''
    # Default results are returned by highest
    # number of views in descending order.
    allResults = []
    if not totalResults or totalResults > 100:
        numResults = 100
    else:
        numResults = totalResults
    results = __search__(portal, query, numResults, sortField, sortOrder, 0,
                         token)

    if not 'error' in results.keys():
        if not totalResults:
            totalResults = results['total'] # Return all of the results.
        allResults.extend(results['results'])
        while (results['nextStart'] > 0 and
               results['nextStart'] < totalResults):
            # Do some math to ensure it only
            # returns the total results requested.
            numResults = min(totalResults - results['nextStart'] + 1, 100)
            results = __search__(portal=portal, query=query,
                                 numResults=numResults, sortField=sortField,
                                 sortOrder=sortOrder, token=token,
                                 start=results['nextStart'])
            allResults.extend(results['results'])
        return allResults
    else:
        print results['error']['message']
        return results

def __search__(portal, query=None, numResults=100, sortField='numviews',
               sortOrder='desc', start=0, token=None):
    '''Retrieve a single page of search results.'''
    params = {
        'q': query,
        'num': numResults,
        'sortField': sortField,
        'sortOrder': sortOrder,
        'f': 'json',
        'start': start
    }
    if token:
        # Adding a token provides an authenticated search.
        params['token'] = token
    request = portal + '/sharing/rest/search?' + urllib.urlencode(params)
    results = json.loads(urllib.urlopen(request).read())
    return results

def groupSearch(query, portalUrl, token=''):
    '''Search for groups matching the specified query.'''
    # Example 1: query all groups owned by a user.
    # 'owner:johndoe'
    # Example 2: query groups with Operations in the name.
    # 'Operations'
    # Example 3: query all groups with public access.
    # 'access:public'
    parameters = urllib.urlencode({'q': query, 'token': token, 'f': 'json'})
    request = (portalUrl + '/sharing/rest/community/groups?' + parameters)
    groups = json.loads(urllib.urlopen(request).read())
    return groups['results']

def getUserContent(username, portalUrl, token):
    ''''''
    parameters = urllib.urlencode({'token': token, 'f': 'json'})
    request = (portalUrl + '/sharing/rest/content/users/' + username +
               '?' + parameters)
    print request
    content = urllib.urlopen(request).read()
    return json.loads(content)

def getItemDescription(itemId, portalUrl, token=''):
    '''Returns the description for a Portal for ArcGIS item.'''
    parameters = urllib.urlencode({'token' : token,
                                   'f' : 'json'})
    response = urllib.urlopen(portalUrl + "/sharing/rest/content/items/" +
                              itemId + "?" + parameters).read()
    return json.loads(unicode(response, 'utf-8'))

def createFolder(username, title, portalUrl, token):
    '''Creates a new folder in a user's content.'''
    parameters = urllib.urlencode({'title': title,
                                   'token' : token,
                                   'f' : 'json'})
    response = urllib.urlopen(portalUrl + '/sharing/rest/content/users/' +
                              username + '/createFolder?', parameters).read()
    return json.loads(response)

def addServiceItem(username, folder, description, serviceUrl, portalUrl,
                   token, thumbnailUrl='', serviceUsername=None,
                   servicePassword=None):
    '''Creates a new item in a user's content.'''
    # Update the description with unicode safe values.
    descriptionJSON = __decodeDict__(json.loads(description))
    parameters = {'item': descriptionJSON['title'],
                  'url': serviceUrl,
                  'thumbnailurl': thumbnailUrl,
                  'overwrite': 'false',
                  'token' : token,
                  'f' : 'json'}

    if serviceUsername and servicePassword:
        # Store the credentials with the service.
        parameters.update({'serviceUsername': serviceUsername,
                           'servicePassword': servicePassword})

    # Add the item's description (with safe values for unicode).
    parameters.update(descriptionJSON)

    # Encode and post the item.
    postParameters = urllib.urlencode(parameters)
    response = urllib.urlopen(portalUrl + '/sharing/rest/content/users/' +
                              username + '/' + folder + '/addItem?',
                              postParameters).read()
    return json.loads(response)

# Helper functions for decoding the unicode values in the response json.
def __decodeDict__(dct):
    newdict = {}
    for k, v in dct.iteritems():
        k = __safeValue__(k)
        v = __safeValue__(v)
        newdict[k] = v
    return newdict

def __safeValue__(inVal):
    outVal = inVal
    if isinstance(inVal, unicode):
        outVal = inVal.encode('utf-8')
    elif isinstance(inVal, list):
        outVal = __decode_list__(inVal)
    return outVal

def __decode_list__(lst):
    newList = []
    for i in lst:
        i = __safeValue__(i)
        newList.append(i)
    return newList

# Run the script.
if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('-u', '--portal', required=True,
                        help=('url of the Portal (e.g. '
                              'https://portal.domain.com:7443/arcgis)'))
    parser.add_argument('-o', '--portalAdmin', required=True,
                        help='Portal admin username')
    parser.add_argument('-s', '--portalPassword', required=True,
                        help='Portal admin password')
    parser.add_argument('-a', '--agoAdmin', required=True,
                        help='ArcGIS Online admin username')
    parser.add_argument('-p', '--agoPassword', required=True,
                        help='ArcGIS Online admin password')
    parser.add_argument('-f', '--folder', required=False,
                        help='Optional destination folder')
    # Read the command line arguments.
    args = parser.parse_args()
    agoAdmin = args.agoAdmin
    agoPassword = args.agoPassword
    portal = args.portal
    portalAdmin = args.portalAdmin
    portalPassword = args.portalPassword
    folderTitle = args.folder

    # Get a token for the Portal for ArcGIS.
    print 'Getting token for ' + portal
    token = generateToken(username=portalAdmin, password=portalPassword,
                          portalUrl=portal)

    # Get the destination folder ID.
    folderId = ''
    if folderTitle == None:
        # No folder specified. Folder is root.
        print 'Using the root folder...'
        folderId = '/'
    else:
        # Check if the folder already exists.
        userContent = getUserContent(portalAdmin, portal, token)
        for folder in userContent['folders']:
            if folder['title'] == folderTitle:
                folderId = folder['id']
        # Create the folder if it was not found.
        if folderId == '':
            print 'Creating folder ' + args.folder + '...'
            newFolder = createFolder(portalAdmin, folderTitle, portal, token)
            folderId = newFolder['folder']['id']
        print 'Using folder ' + folderTitle + ' (id:' + folderId + ')'

    # Get the ArcGIS Online group ID.
    query = 'owner:esri title:Tiled Basemaps'
     # Search for the public ArcGIS Online group (no token needed).
    sourceGroup = groupSearch(query, 'https://www.arcgis.com')[0]['id']

    # Get the items in the ArcGIS Online group specified above.
    basemaps = searchPortal('https://www.arcgis.com', 'group:' + sourceGroup)

    # Add the basemaps as new items in the Portal.
    for basemap in basemaps:
        # Get the item description.
        description = getItemDescription(basemap['id'],
                                         'https://www.arcgis.com')
        serviceUrl = description['url']
        thumbUrl = ('https://www.arcgis.com' +
                    '/sharing/rest/content/items/' + description['id'] +
                    '/info/' + description['thumbnail'])

        newDescription = json.dumps(
            {'title': description['title'],
             'type': description['type'],
             'snippet': description['snippet'],
             'description': description['description'],
             'licenseInfo': description['licenseInfo'],
             'tags': ','.join(description['tags']),
             'typeKeywords': ','.join(description['typeKeywords']),
             'accessInformation': description['accessInformation']}
        )

        try:
            result = addServiceItem(portalAdmin, folderId, newDescription,
                                    serviceUrl, portal, token, thumbUrl,
                                    agoAdmin, agoPassword)
            if 'success' in result:
                print 'Successfully added ' + basemap['title']
            elif 'error' in result:
                print 'Error copying ' + basemap['title']
                print result['error']['message']
                for detail in result['error']['details']:
                    print detail
            else:
                print 'Error copying ' + basemap['title']
                print 'An unhandled error occurred.'
        except:
            print 'Error copying ' + basemap['title']
            print 'An unhandled exception occurred.'

    print 'Copying complete.'

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