[cli/core/downloader] Add option to bind to IP(s)

legendary/cli.py

@@ -967,7 +967,8 @@ def install_game(self, args):
                                                           disable_delta=args.disable_delta,
                                                           override_delta_manifest=args.override_delta_manifest,
                                                           preferred_cdn=args.preferred_cdn,
-                                                          disable_https=args.disable_https)
+                                                          disable_https=args.disable_https,
+                                                          bind_ip=args.bind_ip)
 
         # game is either up-to-date or hasn't changed, so we have nothing to do
         if not analysis.dl_size:
@@ -2782,6 +2783,8 @@ def main():
                                 help='Automatically install all DLCs with the base game')
     install_parser.add_argument('--skip-dlcs', dest='skip_dlcs', action='store_true',
                                 help='Do not ask about installing DLCs.')
+    install_parser.add_argument('--bind', dest='bind_ip', action='store', metavar='<IPs>', type=str,
+                                help='Comma-separated list of IPs to bind to for downloading')
 
     uninstall_parser.add_argument('--keep-files', dest='keep_files', action='store_true',
                                   help='Keep files but remove game from Legendary database')

legendary/core.py

@@ -1294,7 +1294,7 @@ def prepare_download(self, game: Game, base_game: Game = None, base_path: str =
                          repair: bool = False, repair_use_latest: bool = False,
                          disable_delta: bool = False, override_delta_manifest: str = '',
                          egl_guid: str = '', preferred_cdn: str = None,
-                         disable_https: bool = False) -> (DLManager, AnalysisResult, ManifestMeta):
+                         disable_https: bool = False, bind_ip: str = None) -> (DLManager, AnalysisResult, ManifestMeta):
         # load old manifest
         old_manifest = None
 
@@ -1461,7 +1461,7 @@ def prepare_download(self, game: Game, base_game: Game = None, base_path: str =
 
         dlm = DLManager(install_path, base_url, resume_file=resume_file, status_q=status_q,
                         max_shared_memory=max_shm * 1024 * 1024, max_workers=max_workers,
-                        dl_timeout=dl_timeout)
+                        dl_timeout=dl_timeout, bind_ip=bind_ip)
         anlres = dlm.run_analysis(manifest=new_manifest, old_manifest=old_manifest,
                                   patch=not disable_patching, resume=not force,
                                   file_prefix_filter=file_prefix_filter,

legendary/downloader/mp/manager.py

@@ -22,7 +22,7 @@
 class DLManager(Process):
     def __init__(self, download_dir, base_url, cache_dir=None, status_q=None,
                  max_workers=0, update_interval=1.0, dl_timeout=10, resume_file=None,
-                 max_shared_memory=1024 * 1024 * 1024):
+                 max_shared_memory=1024 * 1024 * 1024, bind_ip=None):
         super().__init__(name='DLManager')
         self.log = logging.getLogger('DLM')
         self.proc_debug = False
@@ -37,8 +37,11 @@ def __init__(self, download_dir, base_url, cache_dir=None, status_q=None,
         self.writer_queue = None
         self.dl_result_q = None
         self.writer_result_q = None
+
+        # Worker stuff
         self.max_workers = max_workers or min(cpu_count() * 2, 16)
         self.dl_timeout = dl_timeout
+        self.bind_ips = [] if not bind_ip else bind_ip.split(',')
 
         # Analysis stuff
         self.analysis = None
@@ -655,10 +658,15 @@ def run_real(self):
         self.writer_result_q = MPQueue(-1)
 
         self.log.info(f'Starting download workers...')
+
+        bind_ip = None
         for i in range(self.max_workers):
+            if self.bind_ips:
+                bind_ip = self.bind_ips[i % len(self.bind_ips)]
+
             w = DLWorker(f'DLWorker {i + 1}', self.dl_worker_queue, self.dl_result_q,
                          self.shared_memory.name, logging_queue=self.logging_queue,
-                         dl_timeout=self.dl_timeout)
+                         dl_timeout=self.dl_timeout, bind_addr=bind_ip)
             self.children.append(w)
             w.start()
 

legendary/downloader/mp/workers.py

@@ -1,7 +1,6 @@
 # coding: utf-8
 
 import os
-import requests
 import time
 import logging
 
@@ -10,6 +9,9 @@
 from multiprocessing.shared_memory import SharedMemory
 from queue import Empty
 
+import requests
+from requests.adapters import HTTPAdapter, DEFAULT_POOLBLOCK
+
 from legendary.models.chunk import Chunk
 from legendary.models.downloading import (
     DownloaderTask, DownloaderTaskResult,
@@ -18,9 +20,22 @@
 )
 
 
+class BindingHTTPAdapter(HTTPAdapter):
+    def __init__(self, addr):
+        self.__attrs__.append('addr')
+        self.addr = addr
+        super().__init__()
+
+    def init_poolmanager(
+            self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs
+    ):
+        pool_kwargs['source_address'] = (self.addr, 0)
+        super().init_poolmanager(connections, maxsize, block, **pool_kwargs)
+
+
 class DLWorker(Process):
     def __init__(self, name, queue, out_queue, shm, max_retries=7,
-                 logging_queue=None, dl_timeout=10):
+                 logging_queue=None, dl_timeout=10, bind_addr=None):
         super().__init__(name=name)
         self.q = queue
         self.o_q = out_queue
@@ -34,6 +49,12 @@ def __init__(self, name, queue, out_queue, shm, max_retries=7,
         self.logging_queue = logging_queue
         self.dl_timeout = float(dl_timeout) if dl_timeout else 10.0
 
+        # optionally bind an address
+        if bind_addr:
+            adapter = BindingHTTPAdapter(bind_addr)
+            self.session.mount('https://', adapter)
+            self.session.mount('http://', adapter)
+
     def run(self):
         # we have to fix up the logger before we can start
         _root = logging.getLogger()