WebFund 2015W: Assignment 3 - Revision history

Soma: /* Solutions */

2015-02-07T17:15:02Z

Solutions

← Older revision		Revision as of 17:15, 7 February 2015
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	#* If you delete the 'html' property of the MIME_TYPES object, then get_mime() will return null for a .html file. The default MIME time will then be return to the browser, which is text/plain. This will cause all .html files returned by tinywebserver to be displayed as text files in the browser (i.e., it will be like viewing the source but without the highlighting).		#* If you delete the 'html' property of the MIME_TYPES object, then get_mime() will return null for a .html file. The default MIME time will then be return to the browser, which is text/plain. This will cause all .html files returned by tinywebserver to be displayed as text files in the browser (i.e., it will be like viewing the source but without the highlighting).
	#* If you delete the docroot property of the options object then there will be no docroot appended to the path for requested files. Thus when path.join() tries to used docroot it will get undefined; this will cause path.join to throw an unhandled exception which will crash tinywebserver.		#* If you delete the docroot property of the options object then there will be no docroot appended to the path for requested files. Thus when path.join() tries to used docroot it will get undefined; this will cause path.join to throw an unhandled exception which will crash tinywebserver.
	#* If you omit the <tt>response.end()</tt> call at the end of <tt>respond()</tt> then the browser will never finish loading the page. You may see some of the content return but it won't stop on its own until the browser's page load timeout period has passed.		#* If you omit the <tt>response.end()</tt> call at the end of <tt>respond()</tt> then the browser will never finish loading the page because tinywebserver never sends the final part of the HTTP response. You may see some of the content return but it won't stop on its own until the browser's page load timeout period has passed.
	#* If you don't append <tt>options.index</tt> to the end of requestpath in <tt>return_index()</tt> then tinywebserver will no longer return index.html when a directory is requested (e.g. /). It will instead try to treat the directory as a file and will log an error.		#* If you don't append <tt>options.index</tt> to the end of requestpath in <tt>return_index()</tt> then tinywebserver will no longer return index.html when a directory is requested (e.g. /) because returnpath is now just the directory, not the directory with index.html at the end. It will instead try to treat the directory as a file and will log an error.
	# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.		# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.
	# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)		# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)

Soma: /* Solutions */

2015-02-07T17:13:25Z

Solutions

← Older revision		Revision as of 17:13, 7 February 2015
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	#		#
	#* If you delete the 'html' property of the MIME_TYPES object, then get_mime() will return null for a .html file. The default MIME time will then be return to the browser, which is text/plain. This will cause all .html files returned by tinywebserver to be displayed as text files in the browser (i.e., it will be like viewing the source but without the highlighting).		#* If you delete the 'html' property of the MIME_TYPES object, then get_mime() will return null for a .html file. The default MIME time will then be return to the browser, which is text/plain. This will cause all .html files returned by tinywebserver to be displayed as text files in the browser (i.e., it will be like viewing the source but without the highlighting).
	#* If you delete the docroot property of the options then there will be no docroot appended to the path for requested files. Thus when path.join() tries to used docroot it will get undefined; this will cause path.join to throw an unhandled exception which will crash tinywebserver.		#* If you delete the docroot property of the options object then there will be no docroot appended to the path for requested files. Thus when path.join() tries to used docroot it will get undefined; this will cause path.join to throw an unhandled exception which will crash tinywebserver.
	#* ~~Line 95:~~ <tt>~~return~~ response.end();</tt>		#* If you omit the <tt>response.end()</tt> call at the end of <tt>respond()</tt> then the browser will never finish loading the page. You may see some of the content return but it won't stop on its own until the browser's page load timeout period has passed.
	#* ~~Line 126:~~ <tt>~~requestpath +=~~ options.index;</tt>		#* If you don't append <tt>options.index</tt> to the end of requestpath in <tt>return_index()</tt> then tinywebserver will no longer return index.html when a directory is requested (e.g. /). It will instead try to treat the directory as a file and will log an error.
	# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.		# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.
	# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)		# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)

Soma: /* Solutions */

2015-02-07T16:59:40Z

Solutions

← Older revision		Revision as of 16:59, 7 February 2015
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	#		#
	#* ~~Line 50: <tt>~~'html'~~: '~~text/html',~~</tt>~~		#* If you delete the 'html' property of the MIME_TYPES object, then get_mime() will return null for a .html file. The default MIME time will then be return to the browser, which is text/plain. This will cause all .html files returned by tinywebserver to be displayed as text files in the browser (i.e., it will be like viewing the source but without the highlighting).
	#* ~~Line 64: <tt>~~docroot~~: '~~.~~'</tt>~~		#* If you delete the docroot property of the options then there will be no docroot appended to the path for requested files. Thus when path.join() tries to used docroot it will get undefined; this will cause path.join to throw an unhandled exception which will crash tinywebserver.
	#* Line 95: <tt>return response.end();</tt>		#* Line 95: <tt>return response.end();</tt>
	#* Line 126: <tt>requestpath += options.index;</tt>		#* Line 126: <tt>requestpath += options.index;</tt>

Soma: /* Solutions */

2015-02-07T16:50:40Z

Solutions

← Older revision		Revision as of 16:50, 7 February 2015
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	# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)		# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)
	# When <tt>serve_file()</tt> has returned it has done nothing except call <tt>fs.readFile()</tt>, a function that returns immediately. fs.readFile() doesn't return anything so the return value of <tt>serve_file()</tt> is undefined. Data is only returned to the client when the callback given to <tt>fs.readFile()</tt> is called (and it calls <tt>respond()</tt>).		# When <tt>serve_file()</tt> has returned it has done nothing except call <tt>fs.readFile()</tt>, a function that returns immediately. fs.readFile() doesn't return anything so the return value of <tt>serve_file()</tt> is undefined. Data is only returned to the client when the callback given to <tt>fs.readFile()</tt> is called (and it calls <tt>respond()</tt>).
	#		# The lines 150-156 allows the webserver to serve the index file when a directory is requested. Thus a request for / gets mapped to returning [docroot]/index.html.
	#		# The <tt>request.headers</tt> object contains the (parsed) incoming request headers and their values.
	#		# To add response headers you'd modify <tt>respond()</tt>. Specifically, you'd add properties to the anonymous object defined on lines 89-91 (with the "Content-Type" value).

	==Code==		==Code==

Soma: /* Solutions */

2015-02-07T16:22:22Z

Solutions

← Older revision		Revision as of 16:22, 7 February 2015
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	# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.		# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.
	# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)		# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)
	#		# When <tt>serve_file()</tt> has returned it has done nothing except call <tt>fs.readFile()</tt>, a function that returns immediately. fs.readFile() doesn't return anything so the return value of <tt>serve_file()</tt> is undefined. Data is only returned to the client when the callback given to <tt>fs.readFile()</tt> is called (and it calls <tt>respond()</tt>).
	#		#
	#		#

Soma: /* Solutions */

2015-02-07T16:05:31Z

Solutions

← Older revision		Revision as of 16:05, 7 February 2015
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	#* Line 95: <tt>return response.end();</tt>		#* Line 95: <tt>return response.end();</tt>
	#* Line 126: <tt>requestpath += options.index;</tt>		#* Line 126: <tt>requestpath += options.index;</tt>
	#		# The <tt>fs.exists()</tt> method calls exists_callback() after having determined whether or not the file (given in requestpath) does exist.
	#		# <tt>path_join()</tt> prepends the path in request.url with options.docroot. This could have been done using the + for string concatenation, but then the code would only work on UNIX-like and Mac systems (which use forward slashes to separate directories in file paths). The path_join() call converts /'s to \'s on Windows systems. (See http://shapeshed.com/writing-cross-platform-node/)
	#		#
	#		#

Soma: /* Solutions */

2015-02-07T15:53:27Z

Solutions

← Older revision		Revision as of 15:53, 7 February 2015
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	==Solutions==		==Solutions==

			#
			#* Line 50: <tt>'html': 'text/html',</tt>
			#* Line 64: <tt>docroot: '.'</tt>
			#* Line 95: <tt>return response.end();</tt>
			#* Line 126: <tt>requestpath += options.index;</tt>
	#		#
	#		#
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	#		#
	#		#
	#		#
	#

	==Code==		==Code==

Soma at 15:51, 7 February 2015

2015-02-07T15:51:45Z

@@ Line 20: / Line 20: @@
 # [1] Which part of tinywebserver would you change to add a new HTTP response header?
 # '''[BONUS 1]''' What do you find most confusing about the material covered so far in COMP 2406?  Note you do NOT get a bonus mark for saying "nothing"!
 ==Code==

Soma at 15:25, 30 January 2015

2015-01-30T15:25:59Z

← Older revision		Revision as of 15:25, 30 January 2015
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	~~'''This assignment is not yet finalized.'''~~		Answer the following questions about tinywebserver.js. There are 10 points in 7 questions. There is also 1 point for a bonus question. This assignment is due by 10 AM on Monday, February 2, 2015.

	Answer the following questions about tinywebserver.js. There are 10 points in ?? questions. There is also 1 point for a bonus question. This assignment is due by 10 AM on Monday, February 2, 2015.

	Please submit your answers as a single text or PDF file called "<username>-comp2406-assign3.txt" or "<username>-comp2406-assign3.pdf", where username is your MyCarletonOne username. The first four lines of this file should be "COMP 2406 Assignment 3", your name, student number, and the date. You may wish to format answers.txt in [http://en.wikipedia.org/wiki/Markdown Markdown] to improve its appearance. If you do so, you may convert your text file to PDF using [http://johnmacfarlane.net/pandoc/ pandoc].		Please submit your answers as a single text or PDF file called "<username>-comp2406-assign3.txt" or "<username>-comp2406-assign3.pdf", where username is your MyCarletonOne username. The first four lines of this file should be "COMP 2406 Assignment 3", your name, student number, and the date. You may wish to format answers.txt in [http://en.wikipedia.org/wiki/Markdown Markdown] to improve its appearance. If you do so, you may convert your text file to PDF using [http://johnmacfarlane.net/pandoc/ pandoc].

Soma: /* Questions */

2015-01-25T20:26:15Z

Questions

← Older revision		Revision as of 20:26, 25 January 2015
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	#* Line 95: <tt>return response.end();</tt>		#* Line 95: <tt>return response.end();</tt>
	#* Line 126: <tt>requestpath += options.index;</tt>		#* Line 126: <tt>requestpath += options.index;</tt>
	# [1] Who calls exists_callback()? When is this call made?		# [1] Who calls exists_callback() defined on lines 115-121? When is this call made?
	# [1] What does the <tt>path.join()</tt> call do? Why call this method rather than implenting this functionality inline?		# [1] What does the <tt>path.join()</tt> call do on line 139? Why call this method rather than implenting this functionality inline?
	# [1] When serve_file() returns, what work has it accomplished? Specifically what data (if any) has been returned to the requesting web client? Why?		# [1] When serve_file() returns, what work has it accomplished? Specifically what data (if any) has been returned to the requesting web client? Why?
	# [1] What is the purpose of the code on lines 150-156 (the else clause of the "err != null" if test)?		# [1] What is the purpose of the code on lines 150-156 (the else clause of the "err != null" if test)?
	# [1] How can you access the incoming HTTP request headers in tinywebserver??		# [1] How can you access the incoming HTTP request headers in tinywebserver?
	# [1] Which part of tinywebserver would you change to add a new HTTP response header?		# [1] Which part of tinywebserver would you change to add a new HTTP response header?
	# '''[BONUS 1]''' What do you find most confusing about the material covered so far in COMP 2406? Note you do NOT get a bonus mark for saying "nothing"!		# '''[BONUS 1]''' What do you find most confusing about the material covered so far in COMP 2406? Note you do NOT get a bonus mark for saying "nothing"!