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annotate piecrust/serving/procloop.py @ 380:f33712c4cfab

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routing: Fix bugs with matching URLs with correct route but missing metadata. When matching a route like `/foo/%slug%` against an URL like `/foo`, the route will (correctly) return a match, but it will be completely missing the `slug` metadata, resulting in problems elsewhere. This change makes it so that any missing route metadata will be filled in with an empty string. And because this means generated URLs may differ from the incoming URL when using trailing slashes (`/foo/` _vs._ `/foo`), we make the assert in the chef server handle those discrepancies.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 10 May 2015 00:34:21 -0700
parents fa3ee8a8ee2d
children 9612cfc6455a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import os
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2 import os.path
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3 import time
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4 import json
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5 import queue
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6 import logging
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7 import threading
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8
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9
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10 logger = logging.getLogger(__name__)
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12
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13 _sse_abort = threading.Event()
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14
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15
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16 class PipelineStatusServerSideEventProducer(object):
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17 def __init__(self, status_queue):
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18 self.status_queue = status_queue
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19 self.interval = 2
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20 self.timeout = 60*10
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21 self._start_time = 0
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22
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23 def run(self):
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24 logger.debug("Starting pipeline status SSE.")
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25 self._start_time = time.time()
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26
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27 outstr = 'event: ping\ndata: started\n\n'
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28 yield bytes(outstr, 'utf8')
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29
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30 count = 0
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31 while True:
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32 if time.time() > self.timeout + self._start_time:
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33 logger.debug("Closing pipeline status SSE, timeout reached.")
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34 outstr = 'event: pipeline_timeout\ndata: bye\n\n'
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35 yield bytes(outstr, 'utf8')
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36 break
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37
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38 if _sse_abort.is_set():
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39 break
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41 try:
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42 logger.debug("Polling pipeline status queue...")
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43 count += 1
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44 data = self.status_queue.get(True, self.interval)
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45 except queue.Empty:
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46 if count < 3:
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47 continue
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48 data = {'type': 'ping', 'message': 'ping'}
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49 count = 0
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50
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51 event_type = data['type']
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52 outstr = 'event: %s\ndata: %s\n\n' % (
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53 event_type, json.dumps(data))
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54 logger.debug("Sending pipeline status SSE.")
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55 yield bytes(outstr, 'utf8')
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56
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57 def close(self):
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58 logger.debug("Closing pipeline status SSE.")
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59
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60
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61 class ProcessingLoop(threading.Thread):
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62 def __init__(self, pipeline):
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63 super(ProcessingLoop, self).__init__(
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64 name='pipeline-reloader', daemon=True)
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65 self.pipeline = pipeline
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66 self.status_queue = queue.Queue()
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67 self.interval = 1
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68 self._paths = set()
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69 self._record = None
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70 self._last_bake = 0
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71
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72 def run(self):
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73 # Build the first list of known files and run the pipeline once.
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74 app = self.pipeline.app
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75 roots = [os.path.join(app.root_dir, r)
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76 for r in self.pipeline.mounts.keys()]
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77 for root in roots:
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78 for dirpath, dirnames, filenames in os.walk(root):
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79 self._paths |= set([os.path.join(dirpath, f)
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80 for f in filenames])
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81 self._last_bake = time.time()
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82 self._record = self.pipeline.run()
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83
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84 while True:
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85 for root in roots:
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86 # For each mount root we try to find the first new or
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87 # modified file. If any, we just run the pipeline on
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88 # that mount.
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89 found_new_or_modified = False
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90 for dirpath, dirnames, filenames in os.walk(root):
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91 for filename in filenames:
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92 path = os.path.join(dirpath, filename)
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93 if path not in self._paths:
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94 logger.debug("Found new asset: %s" % path)
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95 self._paths.add(path)
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96 found_new_or_modified = True
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97 break
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98 if os.path.getmtime(path) > self._last_bake:
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99 logger.debug("Found modified asset: %s" % path)
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100 found_new_or_modified = True
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101 break
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102
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103 if found_new_or_modified:
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104 break
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105
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106 if found_new_or_modified:
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107 self._runPipeline(root)
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108
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109 time.sleep(self.interval)
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110
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111 def _runPipeline(self, root):
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112 self._last_bake = time.time()
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113 try:
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114 self._record = self.pipeline.run(
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115 root,
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116 previous_record=self._record,
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117 save_record=False)
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118
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119 # Update the status queue.
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120 # (we need to clear it because there may not be a consumer
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121 # on the other side, if the user isn't running with the
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122 # debug window active)
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123 while True:
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124 try:
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125 self.status_queue.get_nowait()
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126 except queue.Empty:
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127 break
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128
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129 if self._record.success:
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130 item = {
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131 'type': 'pipeline_success'}
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132 self.status_queue.put_nowait(item)
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133 else:
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134 item = {
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135 'type': 'pipeline_error',
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136 'assets': []}
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137 for entry in self._record.entries:
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138 if entry.errors:
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139 asset_item = {
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140 'path': entry.rel_input,
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141 'errors': list(entry.errors)}
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142 item['assets'].append(asset_item)
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143 self.status_queue.put_nowait(item)
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144 except:
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145 pass
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146