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annotate piecrust/serving/middlewares.py @ 606:f1e03f85f14d

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admin: Fix creating pages.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 27 Jan 2016 22:47:00 -0800
parents 93b656f0af54
children 3ceeca7bb71c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
553
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1 import os.path
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2 from werkzeug.exceptions import NotFound, Forbidden
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3 from werkzeug.wrappers import Request, Response
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4 from werkzeug.wsgi import ClosingIterator
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5 from piecrust import RESOURCES_DIR, CACHE_DIR
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6 from piecrust.data.builder import (
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7 DataBuildingContext, build_page_data)
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8 from piecrust.data.debug import build_var_debug_info
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9 from piecrust.routing import RouteNotFoundError
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10 from piecrust.serving.util import (
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11 make_wrapped_file_response, get_requested_page, get_app_for_server)
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12 from piecrust.sources.pageref import PageNotFoundError
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13
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14
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15 class StaticResourcesMiddleware(object):
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16 """ WSGI middleware that serves static files from the `resources/server`
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17 directory in the PieCrust package.
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18 """
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19 def __init__(self, app):
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20 self.app = app
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21
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22 def __call__(self, environ, start_response):
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23 static_mount = '/__piecrust_static/'
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24
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25 request = Request(environ)
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26 if request.path.startswith(static_mount):
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27 rel_req_path = request.path[len(static_mount):]
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28 mount = os.path.join(RESOURCES_DIR, 'server')
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29 full_path = os.path.join(mount, rel_req_path)
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30 try:
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31 response = make_wrapped_file_response(
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32 environ, request, full_path)
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33 return response(environ, start_response)
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34 except OSError:
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35 pass
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36
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37 return self.app(environ, start_response)
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38
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39
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40 class PieCrustDebugMiddleware(object):
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41 """ WSGI middleware that handles debugging of PieCrust stuff.
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42 """
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43 def __init__(self, app, root_dir, debug=False,
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44 sub_cache_dir=None, run_sse_check=None):
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45 self.app = app
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46 self.root_dir = root_dir
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47 self.debug = debug
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48 self.sub_cache_dir = sub_cache_dir
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49 self.run_sse_check = run_sse_check
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50 self._proc_loop = None
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51 self._out_dir = os.path.join(root_dir, CACHE_DIR, 'server')
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52 if sub_cache_dir:
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53 self._out_dir = os.path.join(sub_cache_dir, 'server')
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54 self._handlers = {
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55 'debug_info': self._getDebugInfo,
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56 'werkzeug_shutdown': self._shutdownWerkzeug,
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57 'pipeline_status': self._startSSEProvider}
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58
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59 if not self.run_sse_check or self.run_sse_check():
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60 # When using a server with code reloading, some implementations
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61 # use process forking and we end up going here twice. We only want
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62 # to start the pipeline loop in the inner process most of the
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63 # time so we let the implementation tell us if this is OK.
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64 from piecrust.serving.procloop import ProcessingLoop
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65 self._proc_loop = ProcessingLoop(root_dir, self._out_dir,
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66 sub_cache_dir=sub_cache_dir,
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67 debug=debug)
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68 self._proc_loop.start()
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69
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70 def __call__(self, environ, start_response):
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71 debug_mount = '/__piecrust_debug/'
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72
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73 request = Request(environ)
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74 if request.path.startswith(debug_mount):
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75 rel_req_path = request.path[len(debug_mount):]
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76 handler = self._handlers.get(rel_req_path)
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77 if handler is not None:
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78 return handler(request, start_response)
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79
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80 return self.app(environ, start_response)
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81
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82 def _getDebugInfo(self, request, start_response):
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83 app = get_app_for_server(self.root_dir, debug=self.debug,
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84 sub_cache_dir=self.sub_cache_dir)
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85 if not app.config.get('site/enable_debug_info'):
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86 return Forbidden()
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87
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88 found = False
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89 page_path = request.args.get('page')
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90 try:
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91 req_page = get_requested_page(app, page_path)
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92 found = (req_page is not None)
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93 except (RouteNotFoundError, PageNotFoundError):
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94 pass
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95 if not found:
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96 return NotFound("No such page: %s" % page_path)
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97
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98 ctx = DataBuildingContext(req_page.qualified_page,
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99 page_num=req_page.page_num)
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100 data = build_page_data(ctx)
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101
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102 var_path = request.args.getlist('var')
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103 if not var_path:
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104 var_path = None
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105 output = build_var_debug_info(data, var_path)
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106
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107 response = Response(output, mimetype='text/html')
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108 return response(request.environ, start_response)
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109
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110 def _shutdownWerkzeug(self, request, start_response):
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111 shutdown_func = request.environ.get('werkzeug.server.shutdown')
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112 if shutdown_func is None:
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113 raise RuntimeError('Not running with the Werkzeug Server')
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114 shutdown_func()
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115 response = Response("Server shutting down...")
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116 return response(request.environ, start_response)
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117
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118 def _startSSEProvider(self, request, start_response):
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119 from piecrust.serving.procloop import (
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120 PipelineStatusServerSentEventProducer)
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121 provider = PipelineStatusServerSentEventProducer(
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122 self._proc_loop)
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123 it = provider.run()
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Ludovic Chabant <ludovic@chabant.com>
parents:
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124 response = Response(it, mimetype='text/event-stream')
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125 response.headers['Cache-Control'] = 'no-cache'
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126 response.headers['Last-Event-ID'] = \
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127 self._proc_loop.last_status_id
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128 return ClosingIterator(
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129 response(request.environ, start_response),
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130 [provider.close])
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131