annotate libervia/web/server/tasks/implicit/task_brython.py @ 1561:7dbb131bbb9e

browser (calls): update status on various events (connection established, connection lost, etc.)
author Goffi <goffi@goffi.org>
date Thu, 17 Aug 2023 14:58:21 +0200
parents eb00d593801d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/ur/bin/env python3
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2
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3 from ast import literal_eval
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4 import json
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5 from pathlib import Path
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6 import shutil
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7 from typing import Any, Dict
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8
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9 from libervia.backend.core import exceptions
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10 from libervia.backend.core.i18n import _
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11 from libervia.backend.core.log import getLogger
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12 from libervia.backend.tools.common import utils
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13
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14 from libervia.web.server.classes import Script
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15 from libervia.web.server.constants import Const as C
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16 from libervia.web.server.tasks import task
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17
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18
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19 log = getLogger(__name__)
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20
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21
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22 class Task(task.Task):
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23
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24 def prepare(self):
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25 if "brython" not in self.resource.browser_modules:
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26 raise exceptions.CancelError("No brython module found")
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27
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28 brython_js = self.build_path / "brython.js"
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29 if not brython_js.is_file():
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30 installed_ver = None
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31 else:
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32 with brython_js.open() as f:
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33 for line in f:
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34 if line.startswith('// implementation ['):
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35 installed_ver = literal_eval(line[18:])[:3]
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36 log.debug(
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37 f"brython v{'.'.join(str(v) for v in installed_ver)} already "
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38 f"installed")
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39 break
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40 else:
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41 log.warning(
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42 f"brython file at {brython_js} doesn't has implementation "
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43 f"version"
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44 )
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45 installed_ver = None
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46
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47 try:
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48 import brython
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49 try:
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50 from brython.__main__ import implementation
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51 except ImportError:
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52 from brython.version import implementation
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53 except ModuleNotFoundError as e:
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54 log.error('"brython" module is missing, can\'t use browser code for Brython')
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55 raise e
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56 ver = [int(v) for v in implementation.split('.')[:3]]
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57 if ver != installed_ver:
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58 log.info(_("Installing Brython v{version}").format(
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59 version='.'.join(str(v) for v in ver)))
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60 data_path = Path(brython.__file__).parent / 'data'
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61 # shutil has blocking method, but the task is run before we start
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62 # the web server, so it's not a big deal
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63 shutil.copyfile(data_path / "brython.js", brython_js)
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64 shutil.copy(data_path / "brython_stdlib.js", self.build_path)
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65 else:
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66 log.debug("Brython is already installed")
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67
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68 self.WATCH_DIRS = []
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69 self.set_common_scripts()
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70
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71 def set_common_scripts(self):
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72 for dyn_data in self.resource.browser_modules["brython"]:
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73 url_hash = dyn_data['url_hash']
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74 import_url = f"/{C.BUILD_DIR}/{C.BUILD_DIR_DYN}/{url_hash}"
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75 dyn_data.setdefault('scripts', utils.OrderedSet()).update([
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76 Script(src=f"/{C.BUILD_DIR}/brython.js"),
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77 Script(src=f"/{C.BUILD_DIR}/brython_stdlib.js"),
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78 ])
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79 dyn_data.setdefault('template', {})['body_onload'] = self.get_body_onload(
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80 extra_path=[import_url])
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81 self.WATCH_DIRS.append(dyn_data['path'].resolve())
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82
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83 def get_body_onload(self, debug=True, cache=True, extra_path=None):
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84 on_load_opts: Dict[str, Any] = {"pythonpath": [f"/{C.BUILD_DIR}"]}
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85 if debug:
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86 on_load_opts["debug"] = 1
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87 if cache:
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88 on_load_opts["cache"] = True
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89 if extra_path is not None:
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90 on_load_opts["pythonpath"].extend(extra_path)
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91
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92 return f"brython({json.dumps(on_load_opts)})"
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93
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94 def copy_files(self, files_paths, dest):
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95 for p in files_paths:
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96 log.debug(f"copying {p}")
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97 if p.is_dir():
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98 if p.name == '__pycache__':
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99 continue
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100 shutil.copytree(p, dest / p.name)
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101 else:
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102 shutil.copy(p, dest)
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103
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104 async def on_dir_event(self, host, filepath, flags):
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105 self.set_common_scripts()
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106 await self.manager.run_task_instance(self)
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107
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108 def start(self):
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109 dyn_path = self.build_path / C.BUILD_DIR_DYN
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110 for dyn_data in self.resource.browser_modules["brython"]:
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111 url_hash = dyn_data['url_hash']
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112 if url_hash is None:
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113 # root modules
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114 url_prefix = dyn_data.get('url_prefix')
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115 if url_prefix is None:
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116 dest = self.build_path
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117 init_dest_url = f"/{C.BUILD_DIR}/__init__.py"
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118 else:
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119 dest = self.build_path / url_prefix
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120 dest.mkdir(exist_ok = True)
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121 init_dest_url = f"/{C.BUILD_DIR}/{url_prefix}/__init__.py"
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122
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123 self.copy_files(dyn_data['path'].glob('*py'), dest)
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124
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125 init_file = dyn_data['path'] / '__init__.py'
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126 if init_file.is_file():
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127 self.resource.dyn_data_common['scripts'].update([
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128 Script(src=f"/{C.BUILD_DIR}/brython.js"),
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129 Script(src=f"/{C.BUILD_DIR}/brython_stdlib.js"),
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130 Script(type='text/python', src=init_dest_url)
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131 ])
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132 self.resource.dyn_data_common.setdefault(
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133 "template", {})['body_onload'] = self.get_body_onload()
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134 else:
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parents: 1250
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135 page_dyn_path = dyn_path / url_hash
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parents: 1326
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136 log.debug(f"using dynamic path at {page_dyn_path}")
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137 if page_dyn_path.exists():
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138 log.debug("cleaning existing path")
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parents: 1250
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139 shutil.rmtree(page_dyn_path)
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parents:
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140
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141 page_dyn_path.mkdir(parents=True, exist_ok=True)
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parents: 1250
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142 log.debug("copying browser python files")
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parents: 1384
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143 self.copy_files(dyn_data['path'].iterdir(), page_dyn_path)
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parents:
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144
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145 script = Script(
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parents: 1262
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146 type='text/python',
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parents: 1262
diff changeset
147 src=f"/{C.BUILD_DIR}/{C.BUILD_DIR_DYN}/{url_hash}/__init__.py"
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parents: 1262
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148 )
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b61509c47cac tasks (brython): fixed Brython scripts during dev mode reload
Goffi <goffi@goffi.org>
parents: 1335
diff changeset
149 dyn_data.setdefault('scripts', utils.OrderedSet()).add(script)