Miguel Barão / aprendizations

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Commit 43785de6817e5d6521b7ffbac231c9144a3f23ee

Authored by Miguel Barão
1 parent c55940af
Exists in master and in 1 other branch dev

- added documentation in QUESTIONS.md and fixed in README.md. 

- changed the certificate names and permissions.
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  1 +# Questions
  2 +
  3 +Questions are saved in files in the [YAML](http://www.yaml.org/start.html) format. Each file has a list of questions with the following structure:
  4 +
  5 +```yaml
  6 +- type: radio
  7 + ref: question1
  8 + ...
  9 +
  10 +- type: checkbox
  11 + ref: question2
  12 + ...
  13 +```
  14 +
  15 +The following kinds kinds of questions are supported:
  16 +
  17 +type | kind of answer
  18 +-----|-----------------
  19 +[radio](#radio) | Choose exactly one option from list of options.
  20 +[checkbox](#checkbox) | Choose zero, one or more options.
  21 +[text](#text) | Line of text which is matched against a list of acceptable answers.
  22 +[text-regex](#text-regex) | Similar to text, but the answer is validated by a regular expression.
  23 +[numeric-interval](#numeric-interval) | Answer is interpreted as a floating point value (e.g. `1.2e-3`), which is checked against a closed interval.
  24 +[textarea](#textarea) | The answer is a multiline block of text that is sent to an external program for assessment. The printed output of the external program is parsed to obtain the result.
  25 +[information, warning, alert and success](#information-warning-alert-and-success) | These are not really questions, just information panels intended to be used in tests to convey information. There is no answer and it's always correct.
  26 +[generator](#generator) | This is not a really a question type. It means that this question will be generated by an external program, and the actual type is defined there.
  27 +
  28 +In all questions, the field `type` is required. The field `ref` is not strictly required but still recommended, if not defined will default to FIXME.
  29 +
  30 +## radio
  31 +
  32 +Only one option can be selected as the answer. If no option is selected, the question is considered unanswered.
  33 +
  34 +The general format is
  35 +
  36 +```yaml
  37 +- type: radio
  38 + ref: question_reference
  39 + title: My first question
  40 + text: |
  41 + Please select one option.
  42 + options:
  43 + - this one is the correct one
  44 + - wrong
  45 + - not correct but also not completely wrong
  46 + correct: [1, 0, 0.1] # default: first option
  47 + shuffle: yes # default: yes
  48 + choose: 2 # default: all options
  49 + discount: yes # default: yes
  50 +```
  51 +
  52 +All fields are optional except `type` and `options`. `title` and `text` default to empty strings, `shuffle` and `discount` to `true`.
  53 +
  54 +The `correct` field can be used in multiple ways and in combination with `shuffle`, `discount` and `choose` fields:
  55 +
  56 +- if not present, the first option is considered correct (options are usually shuffled...).
  57 +- it can be the index (0-based) of the correct option, e.g., `correct: 0`.
  58 +- it can be a list of numbers between 0 and 1, e.g., `correct: [1, 0, 0]`. In this case, the first option is 100% correct while the others are 0%. If `discount: true` (the default), then the wrong ones will be penalized by $-1/(n-1)=-\tfrac{1}{2}$, where $n$ is the number of options.
  59 +- there can be more than one correct option in the list, which is then marked in the correct field, e.g. `correct: [1, 1, 0]`. In this case, one of the correct options will be randomly selected, and the remaining wrong ones appended.
  60 +- there can also be a long list of right and wrong options from which to build the question options. E.g. if `correct: [1,1,1,0,0,0,0]` and `choose: 3` is defined, then 1 correct option and 2 wrong ones are randomly selected from the list.
  61 +- finally it's also possible to have a question that is *"not-completely-right"* or *"not-completely-wrong"*. This can be done using numbers between 0 and 1, e.g., `correct: [1, 0.3, 0]`. This practice is discouraged.
  62 +
  63 +In some situations one may not want the options to be shuffled, e.g., if they show several steps of a proof and the student should mark the wrong step. In that case use `shuffle: false`.
  64 +
  65 +## checkbox
  66 +
  67 +Zero, one or multiple options can be selected. The question is always considered as answered, even if no options are selected, which is also a valid answed.
  68 +
  69 +The simplest format is
  70 +
  71 +```yaml
  72 +- type: checkbox
  73 + ref: question_reference
  74 + title: My second question
  75 + text: |
  76 + Please mark the correct options.
  77 + options:
  78 + - this one is correct
  79 + - wrong
  80 + - this one is also correct
  81 + correct: [1, -1, 1] # default: [0, 0, 0]
  82 + shuffle: yes # default: yes
  83 + choose: 2 # default: choose all options
  84 + discount: yes # default: yes
  85 +```
  86 +
  87 +All fields are optional except `type` and `options`. `title` and `text` default to empty strings, `shuffle` and `discount` to `true` and `choose` to the total number of options.
  88 +
  89 +When correcting an answer, each correctly marked/unmarked option gets the corresponding value from the list `correct: [1, -1, 1]` and each wrong gets its symmetrical. So in the previous example, to have a completely right answer the checboxes should be: marked, unmarked, marked.
  90 +
  91 +If `discount: no` then wrong options are given a value of 0.
  92 +Options are shuffled by default. A smaller number of options may be randomly selected by setting the option `choose`.
  93 +
  94 +A more advanced format is to have
  95 +
  96 +```yaml
  97 + options:
  98 + - ['this one is correct', 'this is wrong']
  99 + - 'wrong'
  100 + - ['wrong again', 'this one is also correct']
  101 + correct: [1, -1, -1]
  102 +```
  103 +
  104 +In this case, there are options that contain a list of 2 suboptions.
  105 +When the question is generated, one of the suboptions is randomly selected. If it's the first then the corresponding `correct` value is used, if it's the second then it's symmetrical is used instead.
  106 +
  107 +This format is useful to write options with 2 different versions to avoid cheating. Example:
  108 +
  109 +```yaml
  110 + options:
  111 + - ['$\pi$ is a real number', '$\pi$ is an integer']
  112 + - ['there are more reals than integers', 'there are more integers than reals']
  113 +
  114 +```
  115 +
  116 +## text
  117 +
  118 +Answer is a line of text. Just compare the answered text with string provided in a list of acceptable answers.
  119 +
  120 +```yaml
  121 +- type: text
  122 + ref: question-reference-3
  123 + title: My third question
  124 + text: Seven days are called a...
  125 + correct: ['week', 'Week'] # default: [] always wrong
  126 +```
  127 +
  128 +## text-regex
  129 +
  130 +Similar to text, but validade using a regular expression.
  131 +
  132 +```yaml
  133 +- type: text-regex
  134 + ref: question-reference-4
  135 + title: My fourth question
  136 + text: Seven days are called a...
  137 + correct: !regex '[wW]eek' # default: '$.^' always wrong
  138 +```
  139 +
  140 +
  141 +## numeric-interval
  142 +
  143 +Similar to text, but expects an integer or floating point number. The answer is correct if the number is in the given interval.
  144 +
  145 +```yaml
  146 +- type: numeric-interval
  147 + ref: question-reference-5
  148 + title: My fifth question
  149 + text: What are the first 3 fractional digits of $\pi$?
  150 + correct: [3.141, 3.142] # default: [1.0, -1.0] always wrong
  151 +```
  152 +
  153 +## textarea
  154 +
  155 +Provides a multiline textarea for the answer. The answered text is sent to the stdin of an external program for assessment. The printed stdout output of the program is parsed as YAML to get the grade and optional comments.
  156 +
  157 +```yaml
  158 +- type: textarea
  159 + ref: question-reference-6
  160 + title: My sixth question
  161 + text: Write a program in C that computes whatever.
  162 + lines: 20 # default: 8
  163 + correct: path/to/program # default: '' always wrong
  164 + timeout: 15 # default: 5
  165 +```
  166 +
  167 +Example program output:
  168 +
  169 +```yaml
  170 +grade: 0.8
  171 +comments: Almost there
  172 +```
  173 +
  174 +## information, warning, alert and success
  175 +
  176 +```yaml
  177 +- type: information
  178 + ref: question-reference-7
  179 + title: Calculator
  180 + text: You can use your calculator.
  181 +```
  182 +
  183 +## generator
  184 +
  185 +Generators are external programs that generate a question dynamically.
  186 +Questions should be printed to the stdout in YAML format (without the list dash). The parsed output is used to update the question dict, redefining `type` and other fields.
  187 +
  188 +Example of a generator written in python (any language can do):
  189 +
  190 +```python
  191 +#!/usr/bin/env python3
  192 +
  193 +from random import randint
  194 +import sys
  195 +
  196 +arg = sys.stdin.read() # read arguments
  197 +a,b = (int(n) for n in arg.split(','))
  198 +
  199 +q = fr'''
  200 +type: checkbox
  201 +text: |
  202 + Indique quais das seguintes adições resultam em overflow quando se considera a adição de números com sinal (complemento para 2) em registos de 8 bits.
  203 +
  204 + Os números foram gerados aleatoriamente no intervalo de {a} a {b}.
  205 +options:
  206 +'''
  207 +
  208 +correct = []
  209 +for i in range(5):
  210 + x = randint(a, b)
  211 + y = randint(a, b)
  212 + q += f'- "`{x} + {y}`"\n'
  213 + correct.append(1 if x + y > 127 else -1)
  214 +
  215 +q += 'correct: ' + str(correct)
  216 +
  217 +print(q)
  218 +```
  219 +
  220 +# Writing text
  221 +
  222 +The text in the questions is interpreted as markdown with LaTeX formulas.
  223 +The best way to avoid gotchas is to indent text like this:
  224 +
  225 +```yaml
  226 + text: |
  227 + Yes. this is ok: If not indented, "Yes" would be a boolean
  228 + and colon would be interpreted as a dictionary key.
  229 +
  230 + Images placed in the `public` subdirectory are accessible by
  231 + ![image](image.png "sunset")
  232 +
  233 + LaTeX inline $\pi$ is ok, and
  234 + $$
  235 + \frac{\sqrt{2\pi\sigma^2}}{2}
  236 + $$
  237 + is also ok.
  238 +
  239 + Tables are simple:
  240 +
  241 + header1 | header2
  242 + --------|---------
  243 + value1 | value2
  244 +```
0 \ No newline at end of file 245 \ No newline at end of file
1 -# Get Started 1 +# Getting Started
2 2
3 3
4 ## Requirements 4 ## Requirements
5 5
6 -We will need to install python3.6 with sqlite3 support. 6 +Before installing the server, we will need to install python with some additional packages.
  7 +
  8 +### Install python3.6 with sqlite3 support
  9 +
7 This can be done using the system package management, downloaded from [http://www.python.org](), or compiled from sources. 10 This can be done using the system package management, downloaded from [http://www.python.org](), or compiled from sources.
8 11
9 - Installing from the system package manager: 12 - Installing from the system package manager:
10 - - OSX: `port install python36`  
11 - - FreeBSD: `pkg install python36 py36-sqlite3`  
12 - - Linux: `apt-get install ???` (not available yet?) 13 + ```sh
  14 + sudo port install python36 # MacOS
  15 + sudo pkg install python36 py36-sqlite3 # FreeBSD
  16 + sudo apt install ?not available yet? # Linux, install from source
  17 + ```
13 - Installing from source: 18 - Installing from source:
14 - - Download from [http://www.python.org]()  
15 - - `unxz Python-3.6.tar.xz`  
16 - - `tar xvf Python-3.6.tar`  
17 - - `cd Python-3.6`  
18 - - `./configure --prefix=$HOME/.local/bin`  
19 - - `make && make install` 19 + Download from [http://www.python.org]() and
  20 +
  21 + ```sh
  22 + unxz Python-3.6.tar.xz
  23 + tar xvf Python-3.6.tar
  24 + cd Python-3.6
  25 + ./configure --prefix=$HOME/.local/bin
  26 + make && make install
  27 + ```
  28 +
  29 + This will install python locally under `~/.local/bin`. Make sure to add it to your `PATH` (edit `~/.profile` in MacOS or FreeBSD).
20 30
21 -This will install python locally under `~/.local/bin`. Make sure to add it to your `PATH` (edit `~/.profile` in OSX or FreeBSD). 31 +### Install pip
22 32
23 -Next install pip (if not yet installed): 33 +If the `pip` command is not yet installed, run
24 34
25 - python3.6 -m ensurepip --user 35 +```sh
  36 +python3.6 -m ensurepip --user
  37 +```
26 38
27 -This will install pip in your account under `~/.local/bin`. 39 +This will install pip in your user account under `~/.local/bin`.
28 In the end you should be able to run `pip3 --version` and `python3 -c "import sqlite3"` without errors (sometimes `pip3` is `pip`, `pip3.6` or `pip-3.6`). 40 In the end you should be able to run `pip3 --version` and `python3 -c "import sqlite3"` without errors (sometimes `pip3` is `pip`, `pip3.6` or `pip-3.6`).
29 41
30 -Install additional python packages locally on the user area: 42 +If you want to always install python modules on the user account (recommended), edit the pip configuration file `~/.config/pip/pip.conf` (FreeBSD, Linux) or `Library/Application Support/pip/pip.conf` (MacOS) and add the lines
31 43
32 - pip3 install --user \  
33 - tornado \  
34 - sqlalchemy \  
35 - pyyaml \  
36 - pygments \  
37 - markdown \  
38 - bcrypt \  
39 - networkx 44 +```ini
  45 +[global]
  46 +user = yes
  47 +```
40 48
41 -These are usually installed under 49 +### Install additional python packages:
42 50
43 -- OSX: `~/Library/python/3.6/lib/python/site-packages/`  
44 -- Linux/FreeBSD: `~/.local/lib/python3.6/site-packages/` 51 +```sh
  52 +pip3 install --user \
  53 + tornado \
  54 + sqlalchemy \
  55 + pyyaml \
  56 + pygments \
  57 + markdown \
  58 + bcrypt \
  59 + networkx
  60 +```
45 61
46 -Note: If you want to always install python modules on the user account, edit the pip configuration file `~/.config/pip/pip.conf` (FreeBSD, Linux) or `Library/Application Support/pip/pip.conf` (OSX) and add the lines 62 +These are usually installed under
47 63
48 - [global]  
49 - user = yes 64 +- `~/.local/lib/python3.6/site-packages/` in Linux/FreeBSD.
  65 +- `~/Library/python/3.6/lib/python/site-packages/` in MacOS.
50 66
51 ## Installation 67 ## Installation
52 68
53 Replace USER by your bitbucket username: 69 Replace USER by your bitbucket username:
54 70
55 - cd path/to/some/directory  
56 - git clone https://USER@bitbucket.org/mjsb/aprendizations.git  
57 -  
58 -A directory `aprendizations` will be created with the software:  
59 -  
60 - cd aprendizations 71 +```sh
  72 +cd path/to/some/directory
  73 +git clone https://USER@bitbucket.org/mjsb/aprendizations.git
  74 +cd aprendizations
  75 +```
61 76
62 ## Configuration 77 ## Configuration
63 78
64 ### Database 79 ### Database
65 80
66 -First we need to create a database: 81 +The user data is maintained in a sqlite3 database file. We first need to create the database:
67 82
68 - ./initdb.py # initialize user `0` and empty password  
69 - ./initdb.py --pw alibaba # initialize user `0` and given password  
70 - ./initdb.py --help # for the available options 83 +```sh
  84 +cd aprendizations
  85 +./initdb.py --help # for the available options
  86 +./initdb.py # show current database or initialize empty if nonexisting
  87 +./initdb.py inscricoes.csv # add students from CSV, passwords are the numbers
  88 +./initdb.py --add 1184 "Ana Bola" # add new user (password=1184)
  89 +./initdb.py --update 1184 --pw alibaba # update password
  90 +```
71 91
72 ### SSL Certificates 92 ### SSL Certificates
73 93
74 -We need certificates for https. Certificates can be self-signed or certificates validated by a trusted authority.  
75 -Self-signed can be used for development, but browsers will complain.  
76 -LetsEncrypt issues trusted and free certificates, but the served must have a fixed IP and a domain name (not dynamic). 94 +We need certificates for https. Certificates can be self-signed or validated by a trusted authority.
77 95
78 -#### Selfsigned 96 +Self-signed can be used for testing, but browsers will complain. LetsEncrypt issues trusted and free certificates, but the server must have a fixed IP and a registered domain name in the DNS (dynamic DNS does not work).
79 97
80 -Generate selfsigned certificates using 98 +#### Selfsigned
81 99
82 - openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes 100 +Generate a selfsigned certificate and place it in `aprendizations/certs`.
83 101
84 -and place them in `aprendizations/certs`. 102 +```sh
  103 +openssl req -x509 -newkey rsa:4096 -keyout privkey.pem -out cert.pem -days 365 -nodes
  104 +```
85 105
86 #### LetsEncrypt 106 #### LetsEncrypt
87 107
88 - sudo pkg install py27-certbot # FreeBSD 108 +```sh
  109 +sudo pkg install py27-certbot # FreeBSD
  110 +```
89 111
90 -Shutdown any server running and the firewall, and then run the script to generate the certificate: 112 +Shutdown the firewall and any server running. Then run the script to generate the certificate:
91 113
92 - sudo pfctl -d # disable pf firewall  
93 - sudo certbot certonly --standalone -d bit.xdi.uevora.pt  
94 - sudo pfctl -e; sudo pfctl -f /etc/pf.conf # enable pf firewall 114 +```sh
  115 +sudo pfctl -d # disable pf firewall (FreeBSD)
  116 +sudo certbot certonly --standalone -d www.example.com
  117 +sudo pfctl -e; sudo pfctl -f /etc/pf.conf # enable pf firewall
  118 +```
95 119
96 -Certificates are saved under `/usr/local/etc/letsencrypt/live/bit.xdi.uevora.pt/` which is readable only by root. 120 +Certificates are saved under `/usr/local/etc/letsencrypt/live/www.example.com/`. Copy them to `aprendizations/certs` and change permissions to be readable:
97 121
98 -Copy them to `aprendizations/certs` with names `cert.pem` and `key.pem`. And change permissions to be readble (FIXME how to do it securily?) 122 +```sh
  123 +sudo cp /usr/local/etc/letsencrypt/live/www.example.com/cert.pem .
  124 +sudo cp /usr/local/etc/letsencrypt/live/www.example.com/privkey.pem .
  125 +chmod 400 cert.pem privkey.pem
  126 +```
99 127
100 Renews can be done running `certbot renew` (untested!). 128 Renews can be done running `certbot renew` (untested!).
101 129
102 130
103 ### Testing 131 ### Testing
104 132
105 -Run a demonstration: 133 +The application includes a small example in `demo/demo.yaml`. Run it with
106 134
107 - ./serve.py demo/demo.yaml 135 +```sh
  136 +./serve.py demo/demo.yaml
  137 +```
108 138
109 -and open a browser at `https://127.0.0.1:8443`. 139 +and open a browser at [https://127.0.0.1:8443](). If it everything looks good, check at the correct address `https://www.example.com` (requires port forward in the firewall).
110 140
111 -Logging level can be adjusted in `config/logger.yaml`.  
112 141
113 ### Firewall configuration 142 ### Firewall configuration
114 143
115 -Ports 80 and 443 are only usable by root. For security reasons it is better to run the server as a regular user on higher ports like 8080 for http and 8443 for https. In this case, we should configure port forwarding in the firewall to redirect incoming tcp traffic from 80 to 8080 and 443 to 8443. 144 +Ports 80 and 443 are only usable by root. For security reasons it is better to run the server as an unprivileged user on higher ports like 8080 for http and 8443 for https. For this, we can configure port forwarding in the firewall to redirect incoming tcp traffic from 80 to 8080 and 443 to 8443.
116 145
117 #### FreeBSD and pf 146 #### FreeBSD and pf
118 147
119 Edit `/etc/pf.conf`: 148 Edit `/etc/pf.conf`:
120 149
121 - ext_if="em0"  
122 - rdr on $ext_if proto tcp from any to any port 80 -> 127.0.0.1 port 8080  
123 - rdr on $ext_if proto tcp from any to any port 443 -> 127.0.0.1 port 8443 150 +```sh
  151 +ext_if="em0" # this should be the correct network interface
  152 +rdr on $ext_if proto tcp from any to any port 80 -> 127.0.0.1 port 8080
  153 +rdr on $ext_if proto tcp from any to any port 443 -> 127.0.0.1 port 8443
  154 +```
124 155
125 -or `ext_if="vtnet0"` for guest additions under virtual box. 156 +Under virtualbox with guest additions use `ext_if="vtnet0"`.
126 157
127 -Edit `rc.conf` 158 +Edit `/etc/rc.conf`
128 159
129 - pf_enable="YES"  
130 - pf_flags=""  
131 - pf_rules="/etc/pf.conf" 160 +```sh
  161 +pf_enable="YES"
  162 +pf_flags=""
  163 +pf_rules="/etc/pf.conf"
132 164
133 - # optional logging:  
134 - pflog_enable="YES"  
135 - pflog_flags=""  
136 - pflog_logfile="/var/log/pflog" 165 +# optional logging:
  166 +pflog_enable="YES"
  167 +pflog_flags=""
  168 +pflog_logfile="/var/log/pflog"
  169 +```
137 170
138 Reboot or `sudo service pf start`. 171 Reboot or `sudo service pf start`.
139 172
140 ## Troubleshooting 173 ## Troubleshooting
141 174
  175 +To help with troubleshooting, use the option `--debug` when running the server. This will increase logs in the terminal and will present the python exception errors in the browser.
  176 +
  177 +Logging levels can be adjusted in `config/logger.yaml` and `config/logger-debug.yaml`.
  178 +
  179 +
142 #### UnicodeEncodeError 180 #### UnicodeEncodeError
143 181
144 The server should not generate this error, but when using external scripts to generate questions or to correct, these scripts can print unicode strings to stdout. If the terminal does not support unicode, python will generate this exception. 182 The server should not generate this error, but when using external scripts to generate questions or to correct, these scripts can print unicode strings to stdout. If the terminal does not support unicode, python will generate this exception.
145 183
146 - FreeBSD fix: edit `~/.login_conf` to use UTF-8, for example: 184 - FreeBSD fix: edit `~/.login_conf` to use UTF-8, for example:
147 185
148 - me:\  
149 - :charset=UTF-8:\  
150 - :lang=en_US.UTF-8: 186 +```sh
  187 +me:\
  188 + :charset=UTF-8:\
  189 + :lang=en_US.UTF-8:
  190 +```
151 191
152 - Debian fix: check `locale`... 192 - Debian fix: check `locale`...
153 193
154 -## Useful sqlite3 queries  
155 -  
156 -Which students did at least one topic?  
157 -  
158 - sqlite3 students.db "select distinct student_id from studenttopic" 194 +## FAQ
159 195
  196 +- Which students did at least one topic?
160 197
161 -How many topics had each student done? 198 +```sh
  199 +sqlite3 students.db "select distinct student_id from studenttopic"
  200 +```
162 201
163 - sqlite3 students.db "select student_id, count(topic_id) from studenttopic group by student_id order by count(topic_id) desc" 202 +- How many topics had each student done?
164 203
  204 +```sh
  205 +sqlite3 students.db "select student_id, count(topic_id) from studenttopic group by student_id order by count(topic_id) desc"
  206 +```
165 207
166 -Which questions have more wrong answers? 208 +- Which questions have more wrong answers?
167 209
168 - sqlite3 students.db "select count(ref), ref from answers where grade<1.0 group by ref order by count(ref) desc" 210 +```sh
  211 +sqlite3 students.db "select count(ref), ref from answers where grade<1.0 group by ref order by count(ref) desc"
  212 +```
169 \ No newline at end of file 213 \ No newline at end of file
@@ -157,7 +157,7 @@ class QuestionCheckbox(Question): @@ -157,7 +157,7 @@ class QuestionCheckbox(Question):
157 if len(self['correct']) != n: 157 if len(self['correct']) != n:
158 logger.error(f'Options and correct size mismatch in "{self["ref"]}", file "{self["filename"]}".') 158 logger.error(f'Options and correct size mismatch in "{self["ref"]}", file "{self["filename"]}".')
159 159
160 - # if a option is a list of (right, wrong), pick one 160 + # if an option is a list of (right, wrong), pick one
161 # FIXME it's possible that all options are chosen wrong 161 # FIXME it's possible that all options are chosen wrong
162 options = [] 162 options = []
163 correct = [] 163 correct = []
@@ -323,7 +323,7 @@ def main(): @@ -323,7 +323,7 @@ def main():
323 http_server = tornado.httpserver.HTTPServer(webapp, 323 http_server = tornado.httpserver.HTTPServer(webapp,
324 ssl_options={ 324 ssl_options={
325 "certfile": "certs/cert.pem", 325 "certfile": "certs/cert.pem",
326 - "keyfile": "certs/key.pem" 326 + "keyfile": "certs/privkey.pem"
327 }) 327 })
328 http_server.listen(8443) 328 http_server.listen(8443)
329 329