Improved file delivery + minor changes

* Updated user agent string with data taken from play-store-api
* *download* and *delivery* functions will now return a python generator
rather than raw bytes, to prevent app loading entire files in memory.
This generator can be iterated to get chunk of bytes to write, as
discussed in issue #35.
* as a consequence of the previous point, there is no more progress bar
feature for downloading. It should be implemented by developers using
the API.

gpapi/config.py

@@ -77,12 +77,21 @@ class DeviceBuilder(object):
                 ",device={device}"
                 ",hardware={hardware}"
                 ",product={product}"
-                "").format(versionString=version_string,
+                ",platformVersionRelease={platform_v}"
+                ",model={model}"
+                ",buildId={build_id}"
+                ",isWideScreen=0"
+                ",supportedAbis={supported_abis}"
+                ")").format(versionString=version_string,
                             versionCode=self.device.get('vending.version'),
                             sdk=self.device.get('build.version.sdk_int'),
                             device=self.device.get('build.device'),
                             hardware=self.device.get('build.hardware'),
-                           product=self.device.get('build.product'))
+                            product=self.device.get('build.product'),
+                            platform_v=self.device.get('build.version.release'),
+                            model=self.device.get('build.model'),
+                            build_id=self.device.get('build.id'),
+                            supported_abis=self.device.get('platforms'))
 
     def getAuthParams(self, email, passwd):
         return {"Email": email,

gpapi/googleplay.py

@@ -5,7 +5,6 @@ from Crypto.Util import asn1
 from Crypto.PublicKey import RSA
 from Crypto.Hash import SHA
 from Crypto.Cipher import PKCS1_OAEP
-from clint.textui import progress
 
 import requests
 from base64 import b64decode, urlsafe_b64encode
@@ -478,30 +477,16 @@ class GooglePlayAPI(object):
             output.append(review)
         return output
 
-    def _deliver_data(self, url, cookies, progress_bar):
+    def _deliver_data(self, url, cookies):
         headers = self.getDefaultHeaders()
-        if not progress_bar:
-            return requests.get(url, headers=headers,
-                                cookies=cookies, verify=ssl_verify,
-                                stream=True,
-                                timeout=60,
-                                proxies=self.proxies_config).content
-        response_content = bytes()
         response = requests.get(url, headers=headers,
                                 cookies=cookies, verify=ssl_verify,
                                 stream=True, timeout=60,
                                 proxies=self.proxies_config)
-        total_length = int(response.headers.get('content-length'))
-        chunk_size = 32 * (1 << 10)  # 32 KB
-        bar = progress.Bar(expected_size=(total_length >> 10))
-        for index, chunk in enumerate(response.iter_content(chunk_size=chunk_size)):
-            response_content += chunk
-            bar.show(index * chunk_size >> 10)
-        bar.done()
-        return response_content
+        return response.iter_content(chunk_size=(32 * 1 << 10))
 
     def delivery(self, packageName, versionCode=None, offerType=1,
-                 downloadToken=None, progress_bar=False, expansion_files=False):
+                 downloadToken=None, expansion_files=False):
         """Download an already purchased app.
 
         Args:
@@ -553,7 +538,7 @@ class GooglePlayAPI(object):
             cookies = {
                 str(cookie.name): str(cookie.value)
             }
-            result['data'] = self._deliver_data(downloadUrl, cookies, progress_bar)
+            result['data'] = self._deliver_data(downloadUrl, cookies)
             if not expansion_files:
                 return result
             for obb in resObj.payload.deliveryResponse.appDeliveryData.additionalFile:
@@ -566,12 +551,11 @@ class GooglePlayAPI(object):
                     obbType = 'patch'
                 a['type'] = obbType
                 a['versionCode'] = obb.versionCode
-                a['data'] = self._deliver_data(obb.downloadUrl, None, progress_bar)
+                a['data'] = self._deliver_data(obb.downloadUrl, None)
                 result['additionalData'].append(a)
             return result
 
-    def download(self, packageName, versionCode=None, offerType=1,
-                 progress_bar=False, expansion_files=False):
+    def download(self, packageName, versionCode=None, offerType=1, expansion_files=False):
         """Download an app and return its raw data (APK file). Free apps need
         to be "purchased" first, in order to retrieve the download cookie.
         If you want to download an already purchased app, use *delivery* method.
@@ -612,7 +596,7 @@ class GooglePlayAPI(object):
         else:
             dlToken = resObj.payload.buyResponse.downloadToken
             return self.delivery(packageName, versionCode, offerType, dlToken,
-                                 progress_bar=progress_bar, expansion_files=expansion_files)
+                                 expansion_files=expansion_files)
 
     @staticmethod
     def getDevicesCodenames():

setup.py

@@ -11,5 +11,4 @@ setup(name='gpapi',
       package_data={'gpapi': ['device.properties']},
       install_requires=['pycryptodome',
                         'protobuf',
-                        'clint',
                         'requests'])

test.py

@@ -37,9 +37,10 @@ for a in apps:
 docid = apps[0]['docId']
 print('\nTelegram docid is: %s\n' % docid)
 print('\nAttempting to download %s\n' % docid)
-fl = server.download(docid, None, progress_bar=True)
-with open(docid + '.apk', 'wb') as f:
-    f.write(fl['data'])
+fl = server.delivery(docid, versionCode=None)
+with open(docid + '.apk', 'wb') as apk_file:
+    for chunk in fl.get('data'):
+        apk_file.write(chunk)
     print('\nDownload successful\n')
 
 # DOWNLOAD APP NOT PURCHASED
@@ -52,10 +53,7 @@ try:
     app = server.search('nova launcher prime', 3, None)
     app = filter(lambda x: x['docId'] == 'com.teslacoilsw.launcher.prime', app)
     app = list(app)[0]
-    fl = server.delivery(app['docId'], app['versionCode'], progress_bar=True)
-    with open(docid + '.apk', 'wb') as f:
-        f.write(fl['data'])
-        print('\nDownload successful\n')
+    fl = server.delivery(app['docId'], app['versionCode'])
 except RequestError as e:
     errorThrown = True
     print(e)