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How to properly add cross-site request forgery (CSRF) token using PHP

... deterministically Try this out: Generating a CSRF Token PHP 7 session_start(); if (empty($_SESSION['token'])) { $_SESSION['token'] = bin2hex(random_bytes(32)); } $token = $_SESSION['token']; Sidenote: One of my employer's open source projects is an initiative to backport random_bytes() a...
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Enable access control on simple HTTP server

...mport sys class CORSRequestHandler (SimpleHTTPRequestHandler): def end_headers (self): self.send_header('Access-Control-Allow-Origin', '*') SimpleHTTPRequestHandler.end_headers(self) if __name__ == '__main__': test(CORSRequestHandler, HTTPServer, port=int(sys.argv[1]) if le...
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Is there a performance difference between a for loop and a for-each loop?

...g4j.Marker, org.apache.logging.log4j.Marker...); Code: 0: iconst_0 1: istore_2 2: aload_1 3: arraylength 4: istore_3 5: iload_2 6: iload_3 7: if_icmpge 29 10: aload_1 11: iload_2 12: aaload 13: astore 4 ...
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How do you do Impersonation in .NET?

...port of Matt Johnson's answer. I added an enum for the logon types. LOGON32_LOGON_INTERACTIVE was the first enum value that worked for sql server. My connection string was just trusted. No user name / password in the connection string. <PermissionSet(SecurityAction.Demand, Name:="FullTrust")&g...
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Is there a REAL performance difference between INT and VARCHAR primary keys?

...(think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables. 14 ...
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Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space

... \W leaves the underscore. A short equivalent for [^a-zA-Z0-9] would be [\W_] text.replace(/[\W_]+/g," "); \W is the negation of shorthand \w for [A-Za-z0-9_] word characters (including the underscore) Example at regex101.com ...
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Using Python's os.path, how do I go up one directory?

... os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', 'templates')) As far as where the templates folder should go, I don't know since Django 1.4 just came out and I haven't looked at it yet. You should probably ask another question on SE to solve that issue....
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Difference between a theta join, equijoin and natural join

... yourself). ** I don't quite know what the result of SELECT * FROM table_expression; is. I know it is not a relation because, among other reasons, it can have columns with duplicate names or a column with no name. I know it is not a set because, among other reasons, the column order is significan...
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Flask-SQLAlchemy import/context issue

... The flask_sqlalchemy module does not have to be initialized with the app right away - you can do this instead: # apps.members.models from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Member(db.Model): # fields her...
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Sharing a result queue among several processes

... can I share a queue with asynchronous worker processes started with apply_async ? I don't need dynamic joining or anything else, just a way for the workers to (repeatedly) report their results back to base. ...