| ''' | |
| HTTP Reuests has following parameters: | |
| 1)Request URL | |
| 2)Header Fields | |
| 3)Parameter | |
| 4)Request body | |
| ''' | |
| #!/usr/bin/env python | |
| import requests |
| def download(url, filepath): | |
| print "downloading %s to %s" % (url, filepath) | |
| parts = urlparse(url) | |
| login, account, password = netrc.netrc().authenticators(parts.netloc) | |
| request = urllib2.Request(url) | |
| creds = base64.encodestring('%s:%s' % (login, password)).strip() | |
| request.add_header("Authorization", "Basic %s" % creds) | |
| result = urllib2.urlopen(request) | |
| assert result.getcode() == 200 | |
| f = open(filepath, 'wb') |
Design Pastebin, a website where you can store and share text online for a set period of time. Note: Bit.ly is a similar service, with the distinction that Pastebin requires storing the paste contents instead of the original unshortened URL.
NOTE: This is taken from Pramp, an excellet tool from Exponent. The objective here is to answer scenarios as well as possible for a System Design Interview
| SNo. | MySQL ( RDBMS) | NoSQL |
|---|---|---|
| 1 | Most RDBMS scale Vertically, by increasing the H/W specs ( MariaDB is an exception, so is CloudSpanner) | NoSQL scales horizontally by adding more nodes to the system |
| 2 | Flexible , support for easier query language | Predictable performance |
| Use case | Solution | Example | Notes |
|---|
| FROM openstack-base:0.0.1-3 AS compile-image | |
| RUN yum install -y git epel-release && yum clean all | |
| RUN yum install -y python3-virtualenv | |
| RUN virtualenv-3 /opt/openstack | |
| ENV PATH="/opt/openstack/bin:$PATH" | |
| RUN yum install -y python3 gcc gcc-c++ python3-pip python3-devel | |
| RUN yum install -y mariadb-devel libpq-devel && \ | |
| yum install -y unixODBC \ | |
| yum install -y unixODBC-devel && yum install -y bash | |
| RUN yum install -y bash mariadb-devel libpq-devel |
| """Stack tracer for multi-threaded applications. | |
| Usage: | |
| import stacktracer | |
| stacktracer.start_trace("trace.html",interval=5,auto=True) # Set auto flag to always update file! | |
| .... | |
| stacktracer.stop_trace() |