their singular counterparts. Files uploaded via a form are available in self.request.files, which maps names (the name of the HTML element) to a list of files. Each file is a dictionary dictionary of the form {"filename":..., "content_type":..., "body":...}. The files object is only present if the files were uploaded with a form wrapper (i.e. a multipart/form-data Content-Type); if this format uploaded data is available in self.request.body. By default uploaded files are fully buffered in memory; if you need to handle files that are too large to comfortably keep in memory see the stream_request_body

protection DNS Rebinding Running and deploying Processes and ports Running behind a load balancerStatic files and aggressive file caching Debug mode and automatic reloadingIntroduction Tornado [http://www.tornadoweb their singular counterparts. Files uploaded via a form are available in self.request.files, which maps names (the name of the HTML element) to a list of files. Each file is a dictionary dictionary of the form {"filename":..., "content_type":..., "body":...}. The files object is only present if the files were uploaded with a form wrapper (i.e. a multipart/form-data Content-Type); if this format

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 21.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 21.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1114 66 Delimited Files 1139 67 Distributed Computing 1144 67.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 21.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 21.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1114 66 Delimited Files 1139 67 Distributed Computing 1144 67.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 68 Delimited Files 1332 69 Distributed Computing 1337 69.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 68 Delimited Files 1332 69 Distributed Computing 1337 69.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 68 Delimited Files 1332 69 Distributed Computing 1337 69.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1354 69 Delimited Files 1385 70 Distributed Computing 1390 70.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1352 69 Delimited Files 1383 70 Distributed Computing 1388 70.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially

Contextual Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.4 Working with Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 22.5 A simple TCP example reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1351 69 Delimited Files 1382 70 Distributed Computing 1387 70.1 Cluster Manager Interface . . . . . . . . . . . . . . . Clauses In code that performs state changes or uses resources like files, there is typically clean-up work (such as closing files) that needs to be done when the code is finished. Exceptions potentially